A connecting bracket for electric drive axle assembly vibration test

Abstract

The utility model relates to vehicle electric drive technical field, concretely for a kind of connecting bracket for electric drive axle assembly vibration test, the structure includes support body;The support body includes two groups of ceiling and bottom plate;Two groups of ceiling are fixed on bottom plate side by side, wherein, bottom plate is fixed on vibration test bench, two ends of the electric drive axle assembly are placed on two groups of ceiling respectively, and fixed on bottom plate by two groups of ceiling. The overall structure of the application is single-layer bottom plate and double-layer ceiling flat layout, effectively shorten the distance between electric drive axle assembly and the tabletop of vibration test bench, avoid the interference signal superposition caused by multi-link switching, ensure that the deviation degree of excitation signal transmitted to electric drive axle assembly and test bench preset signal is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle electric drive technology, specifically a connection bracket for vibration testing of electric drive axle assemblies. Background Technology

[0002] With the continuous development of vehicle lightweighting, integration, and efficiency technologies, electric drive axles, as core components of vehicle electric drive systems, are becoming increasingly crucial for technological research and development and performance verification. Existing electric drive axle products effectively eliminate the drive shaft and related connecting parts in traditional transmission systems by integrating the drive motor and reducer (or transmission) into the drive axle body. This not only simplifies the vehicle transmission structure but also significantly reduces the overall vehicle weight and improves transmission efficiency, making it an important development direction for new energy vehicles and high-efficiency transmission vehicles.

[0003] According to relevant technology plans, some companies have already completed the development of three generations of electric drive axle products, and these products have passed bench performance tests. Some electric drive axle assemblies have also completed full-vehicle road tracking tests, indicating that electric drive axle products are gradually moving from the R&D stage to the practical application stage. However, before being put into actual use, electric drive axle assemblies need to undergo rigorous vibration performance tests to verify their structural stability and operational reliability under complex working conditions. Among these tests, the six-degree-of-freedom vibration test bench, which can simulate multi-dimensional actual vibration conditions, has become the core equipment for vibration testing of electric drive axle assemblies.

[0004] When conducting vibration tests on electric drive bridge assemblies using a six-degree-of-freedom vibration test bench, a dedicated support is required to ensure a stable connection between the test bench and the electric drive bridge assembly. This is crucial to ensure that the excitation signal from the test bench is accurately transmitted to the electric drive bridge assembly. However, conventional supports used in this scenario suffer from complex structural designs. On one hand, the complex structure increases the difficulty of assembling the support itself, hindering testing efficiency. On the other hand, and more importantly, the complex structure of conventional supports creates a significant gap between the electric drive bridge assembly and the test bench surface. This gap significantly affects the excitation signal output by the test bench, specifically causing attenuation or interference during transmission. This results in a deviation between the actual excitation signal transmitted to the electric drive bridge assembly and the preset test signal. Consequently, the vibration test results cannot accurately reflect the actual vibration performance of the electric drive bridge assembly, affecting the accuracy of assessments of key indicators such as structural strength and component reliability. Ultimately, this restricts the R&D optimization process and the effectiveness of performance verification for electric drive bridge products. Utility Model Content

[0005] In order to overcome the defects of the existing technology, the purpose of this utility model is to provide a connection bracket for vibration testing of electric drive bridge assembly, so as to solve the technical problem in the prior art of how to shorten the distance between the electric drive bridge assembly and the platform of the vibration test bench to avoid affecting the excitation source signal output by the test bench.

[0006] This utility model is achieved through the following technical solution: This utility model provides a connection bracket for vibration testing of an electric drive bridge assembly, including a bracket body; the bracket body includes two sets of top plates and a bottom plate; the two sets of top plates are fixed side by side on the bottom plate, wherein the bottom plate is fixed on a vibration test bench, and the two ends of the electric drive bridge assembly are respectively placed on the two sets of top plates and fixed to the bottom plate by the two sets of top plates.

[0007] Preferably, the top plate has a plurality of first through holes, and the bottom plate has a plurality of countersunk holes at the corresponding positions of the top plate. A first fixing bolt is inserted into the countersunk hole, and the first fixing bolt passes through the first through hole and is threaded into the first threaded hole at the bottom of the electric drive bridge assembly.

[0008] Furthermore, the diameter of the first fixing bolt corresponds to the diameter of the first through hole and the first threaded hole, respectively.

[0009] Furthermore, the height of the nut of the first fixing bolt is lower than the depth of the countersunk hole.

[0010] Preferably, the base plate is also provided with a number of second through holes, into which second fixing bolts are inserted, and the second fixing bolts are threadedly connected to the second threaded hole on the top of the vibration test bench through the second through holes.

[0011] Furthermore, the diameter of the second fixing bolt corresponds to the diameter of the second through hole and the second threaded hole.

[0012] Preferably, the top plate is welded and fixed to the bottom plate.

[0013] Preferably, the bottom plate has a groove at the position corresponding to the top plate, the size of the groove corresponds to the size of the top plate, and the top plate is welded into the groove.

[0014] Preferably, the two sets of top plates are at the same height as the bottom plate.

[0015] Preferably, the thickness of the two sets of top plates and bottom plates is the same.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a connection bracket for vibration testing of electric drive bridge assemblies. This bracket consists only of a base plate and two sets of side-by-side top plates, eliminating the multi-segment support, complex adapters, or redundant reinforcement structures of conventional brackets, significantly reducing the high redundancy caused by component stacking. The base plate is directly fixed to the vibration test bench surface, and the two sets of top plates are welded or bolted side-by-side to the upper surface of the base plate. The overall structure features a flat layout with a single-layer base plate and double-layer top plates, effectively shortening the distance between the electric drive bridge assembly and the vibration test bench surface. This avoids the superposition of interference signals caused by multiple adapters, ensuring a significant reduction in the deviation between the excitation signal transmitted to the electric drive bridge assembly and the preset signal of the test bench.

[0017] Furthermore, the bolt head is concealed within the countersunk hole, reducing the additional distance between the electric drive bridge assembly and the test bench. This means that the distance between the electric drive bridge assembly and the test bench is determined solely by the thickness of the top and bottom plates, thus avoiding any impact on the output excitation source signal of the test bench. After the first fixing bolt is positioned through the countersunk hole, the bolt axis is aligned with the force direction of the electric drive bridge, and multiple bolts are evenly distributed on the top plate, preventing relative displacement caused by local bolt loosening.

[0018] Furthermore, the diameter of the first fixing bolt corresponds to the size of the diameter of the first through hole and the diameter of the first threaded hole, ensuring convenient assembly while avoiding excessive shaking, and achieving a tight engagement between the bolt and the electric drive bridge assembly.

[0019] Furthermore, by keeping the nut height lower than the countersunk hole depth, the nut is completely concealed within the countersunk hole, neither contacting the test bench surface nor interfering with the top plate assembly. This eliminates the need for any shims or lifting measures, ensuring that the distance between the electric drive bridge and the test bench surface remains stable at the design values ​​of the base plate thickness and the top plate thickness, thus providing a physical basis for short-path transmission of the excitation signal.

[0020] Furthermore, the second fixing bolt is directly screwed into the test bench through the base plate without any intermediate connecting parts. Each set of bolts bears the same vibration load, avoiding deformation or loosening caused by local overload of the base plate.

[0021] Furthermore, the base plate has a groove at the position corresponding to the top plate. The size of the groove corresponds to the size of the top plate, which effectively shortens the distance between the electric drive bridge assembly and the vibration test bench. At the same time, the groove positions and constrains the top plate assembly, avoiding uneven signal transmission caused by lateral offset. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connecting bracket in this utility model; Figure 2 This is a schematic diagram of the electric drive bridge assembly of this utility model being assembled on a vibration test bench via a connecting bracket; In the diagram: 1. Support body; 2. Electric drive bridge assembly; 3. Vibration test bench; 4. First fixing bolt; 5. Second fixing bolt; 11. Top plate; 12. Bottom plate; 111. First through hole; 121. Countersunk hole; 122. Second through hole; 123. Groove; 21. First threaded hole; 31. Second threaded hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] The purpose of this utility model is to provide a connection bracket for vibration testing of electric drive bridge assembly, so as to solve the technical problem in the prior art of how to shorten the distance between the electric drive bridge assembly and the platform of the vibration test bench to avoid affecting the excitation source signal output by the test bench.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 and Figure 2 In one embodiment of the present invention, a connecting bracket for vibration testing of an electric drive bridge assembly is provided, including a bracket body 1; the bracket body 1 includes two sets of top plates 11 and a bottom plate 12; the two sets of top plates 11 are fixed side by side on the bottom plate 12, wherein the bottom plate 12 is fixed on a vibration test bench 3, and the two ends of the electric drive bridge assembly 2 are respectively placed on the two sets of top plates 11 and fixed on the bottom plate 12 by the two sets of top plates 11.

[0027] Specifically, the top plate 11 has a plurality of first through holes 111, and the bottom plate 12 has a plurality of countersunk holes 121 at the position corresponding to the top plate 11. A first fixing bolt 4 is inserted into the countersunk hole 121, and the first fixing bolt 4 passes through the first through hole 111 and is threaded into the first threaded hole 21 at the bottom of the electric drive bridge assembly 2.

[0028] In this embodiment, a coaxial design of the top plate through hole, bottom plate countersunk hole, and electric drive bridge threaded hole creates a direct bolt connection path, replacing the conventional multi-stage connection of the bracket top plate, intermediate adapter, and electric drive bridge, thus avoiding the high redundancy introduced by intermediate components. This avoids the loose connection problem of conventional multi-stage connections, ensuring zero backlash loss of the excitation signal from the top plate to the electric drive bridge.

[0029] The diameter of the first fixing bolt 4 corresponds to the diameter of the first through hole 111 and the first threaded hole 21, respectively.

[0030] The nut height of the first fixing bolt 4 is lower than the depth of the countersunk hole 121.

[0031] Specifically, the base plate 12 is provided with several second through holes 122. Second fixing bolts 5 are inserted into the second through holes 122. The second fixing bolts 5 are threadedly connected to the second threaded hole 31 on the top of the vibration test bench 3 through the second through holes 122.

[0032] The diameter of the second fixing bolt 5 corresponds to the diameter of the second through hole 122 and the second threaded hole 31.

[0033] In this embodiment, the top plate 11 is welded and fixed to the bottom plate 12.

[0034] Specifically, the bottom plate 12 has a groove 123 at the position corresponding to the top plate 11. The size of the groove 123 corresponds to the size of the top plate 11, and the top plate 11 is welded into the groove 123.

[0035] In this embodiment, the two sets of top plates 11 are at the same height as the bottom plate 12. The two sets of top plates 11 and bottom plates 12 have the same thickness.

[0036] In this embodiment, both the top plate 11 and the bottom plate 12 are made of the same type of steel plate, and the overall thickness is only the thickness of two layers of steel plates, which minimizes the distance between the test specimen and the vibration table surface and facilitates the iteration of bench test data.

[0037] In this embodiment, the vibration test support has no other structures or accessories besides the top plate 11 and the bottom plate 12. While meeting the strength and stiffness requirements of the vibration test, the mass of the support assembly can be minimized, thereby improving the response speed of the vibration table.

[0038] In this embodiment, a countersunk hole 121 is provided at the bottom of the vibration test bracket base plate 12 for placing bolts to fix the test specimen. After the bolts are assembled, the bolt heads are all placed inside the countersunk hole with no exposed parts, which facilitates the assembly of the vibration test bracket onto the vibration table. The countersunk hole step surface of the base plate does not penetrate the base plate, and the overall strength is more reliable after the vibration test bracket and the test specimen are assembled.

[0039] The connection bracket for vibration testing of electric drive bridge assembly provided in this embodiment is used as follows: First, the electric drive bridge assembly 2 is assembled onto the two sets of top plates 11, and then the first fixing bolt 4 is threaded through the countersunk hole 121 and the first through hole 111 and threaded into the first threaded hole 21 at the bottom of the electric drive bridge assembly 2. Then, the bottom plate 12 is threaded through the second through hole 122 and threaded into the second threaded hole 31 at the top of the vibration test bench 3 by the second fixing bolt 5, thus completing the fixation of the electric drive bridge assembly 2 on the vibration test bench 3.

[0040] In summary, the connection bracket provided in this embodiment for vibration testing of electric drive bridge assemblies consists only of a base plate and two sets of side-by-side top plates. It eliminates the multi-segment support, complex adapters, or redundant reinforcement structures of conventional brackets, significantly reducing the high redundancy caused by component stacking. The base plate is directly fixed to the vibration test bench surface, and the two sets of top plates are welded or bolted side-by-side to the upper surface of the base plate. The overall structure features a flat layout with a single-layer base plate and double-layer top plates, effectively shortening the distance between the electric drive bridge assembly and the vibration test bench surface. This avoids the superposition of interference signals caused by multiple adapters, ensuring a significant reduction in the deviation between the excitation signal transmitted to the electric drive bridge assembly and the preset signal of the test bench.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A connection bracket for vibration testing of an electric drive bridge assembly, characterized in that, Includes a support body (1); the support body (1) includes two sets of top plates (11) and a bottom plate (12); the two sets of top plates (11) are fixed side by side on the bottom plate (12), wherein the bottom plate (12) is fixed on the vibration test bench (3), and the two ends of the electric drive bridge assembly (2) are respectively placed on the two sets of top plates (11) and fixed on the bottom plate (12) through the two sets of top plates (11).

2. The connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The top plate (11) has several first through holes (111), and the bottom plate (12) has several countersunk holes (121) at the position corresponding to the top plate (11). A first fixing bolt (4) is inserted into the countersunk hole (121), and the first fixing bolt (4) passes through the first through hole (111) and is threaded into the first threaded hole (21) at the bottom of the electric drive bridge assembly (2).

3. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 2, characterized in that, The diameter of the first fixing bolt (4) corresponds to the diameter of the first through hole (111) and the first threaded hole (21).

4. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 2, characterized in that, The nut height of the first fixing bolt (4) is lower than the hole depth of the countersunk hole (121).

5. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The base plate (12) is also provided with several second through holes (122). Second fixing bolts (5) are inserted into the second through holes (122). The second fixing bolts (5) are threadedly connected to the second threaded hole (31) on the top of the vibration test bench (3) through the second through holes (122).

6. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 5, characterized in that, The diameter of the second fixing bolt (5) corresponds to the diameter of the second through hole (122) and the second threaded hole (31).

7. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The top plate (11) is welded and fixed to the bottom plate (12).

8. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The bottom plate (12) has a groove (123) at the position corresponding to the top plate (11). The size of the groove (123) corresponds to the size of the top plate (11), and the top plate (11) is welded into the groove (123).

9. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The two sets of top plates (11) are at the same height as the bottom plate (12).

10. A connection bracket for vibration testing of an electric drive bridge assembly according to claim 1, characterized in that, The two sets of top plates (11) and bottom plates (12) have the same thickness.

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