Pure electric reducer NVH test tooling

Abstract

The present invention discloses a pure electric reducer NVH test tool, including a left dynamometer, a left half-shaft connecting flange, a left half-shaft, a reducer assembly, a speed case assembly, a speed case connecting plate, a right half-shaft, a right half-shaft connecting flange, and a right dynamometer; the left dynamometer is connected to one end of the left half-shaft through the left half-shaft connecting flange, and the other end of the left half-shaft is connected to the reducer assembly, the right dynamometer is connected to the right half-shaft through the right half-shaft connecting flange, and the other end of the right half-shaft is connected to the reducer assembly, and the reducer assembly is connected to the speed case assembly, and also includes a speed case input flange and an input dynamometer, the input dynamometer is connected to the speed case assembly through the speed case input flange, and the speed case assembly is fixed to the input dynamometer through the speed case connecting plate. The present invention solves the problem that the existing equipment has a low speed and a large center distance, and cannot meet the problem that the existing pure electric reducer has a small center distance and a high speed.

Description

Technical Field

[0001] The invention relates to a pure electric reducer NVH test tool. Background Art

[0002] Among the existing new energy reducers, some products have a small center distance and high speed requirements. The current test bench cannot meet the installation requirements of pure electric reducers, and certain tooling conversions are needed to meet the requirements.

[0003] The existing test equipment has the following technical problems:

[0004] 1. Since the input dynamometer is selected to meet the requirements of torque and speed, the dynamometer itself has a large diameter and cannot meet the assembly requirements of the small center distance of the reducer. The input dynamometer speed cannot meet the existing pure electric reducer test requirements.

[0005] 2. Since the equipment is an NVH test equipment, the axial distance of the equipment is subject to the room size of the test room and the acoustic packaging requirements. The test tooling that meets the test conditions cannot be too large, needs to be easy to install, and cannot be too heavy. Due to the requirements of long service life and low cost, material selection is very important.

[0006] 3. The adapter mechanism on the market is large in size, and the center distance after installation exceeds the acoustic packaging structure of the NVH test bench, and cannot be installed on the input dynamometer through the mounting plate. Summary of the invention

[0007] The present invention provides a pure electric reducer NVH test fixture, which solves the problem that the existing equipment has low rotation speed and large center distance and cannot meet the requirements of the existing pure electric reducer with small center distance and high rotation speed.

[0008] The technical solution to achieve the above purpose is as follows:

[0009] The pure electric reducer NVH test tooling includes a left dynamometer, a left half-shaft connecting flange, a left half-shaft, a reducer assembly, a gearbox assembly, a gearbox connecting plate, a right half-shaft, a right half-shaft connecting flange, and a right dynamometer; the left dynamometer is connected to one end of the left half-shaft through the left half-shaft connecting flange, and the other end of the left half-shaft is connected to the reducer assembly; the right dynamometer is connected to the right half-shaft through the right half-shaft connecting flange, and the other end of the right half-shaft is connected to the reducer assembly, and the reducer assembly is connected to the gearbox assembly.

[0010] It also includes a speed box input flange and an input dynamometer. The input dynamometer is connected to the speed box assembly via the speed box input flange, and the speed box assembly is fixed to the input dynamometer via a speed box connecting plate.

[0011] The reducer assembly includes a reducer, a reducer connecting flange, a connecting component, and a speed case connecting flange. One end of the reducer connecting flange is located in the reducer and connected to the reducer, the speed case connecting flange is fixedly connected to the other end of the reducer connecting flange, one end of the connecting component is fixed to the reducer, and the other end of the connecting component is fixed to the speed case assembly.

[0012] The gearbox assembly includes: a gearbox, which includes a left box, a first shaft, a second shaft, and a right box. The left box is fixed to the right box, a portion of the first shaft is located in the left box, one end of the first shaft is connected to the input flange of the gearbox, a portion of the second shaft is located in the right box, one end of the second shaft is connected to the reducer assembly, and the first shaft and the second shaft are matched in transmission.

[0013] One end of the first shaft is connected to the input flange of the gearbox through a spline.

[0014] Gears are provided on both the first shaft and the second shaft, and the first shaft and the second shaft form a transmission fit through the meshing of the gears.

[0015] The main shaft of the input dynamometer is fixed to the input flange of the gearbox by bolts.

[0016] The beneficial technical effects of the present invention are as follows: the gearbox assembly is fixed to the input dynamometer via the gearbox connecting plate, the input dynamometer drives the gearbox assembly to work via the gearbox input flange, the reducer assembly is fixed to the gearbox assembly via connecting components, and the output power of the output end of the gearbox assembly is transmitted to the reducer assembly. This structure makes the pure electric reducer NVH test tooling simple in structure, light in weight, highly versatile, easy to replace, and can meet the NVH test requirements of reducers with a small center distance. By replacing the reducer connecting plate, it can meet the use of reducers of different models. By optimizing the gearbox structure, it can be promoted to use in other test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the general assembly diagram of the present invention;

[0018] Figure 2 It is an assembly diagram of the reducer assembly and the speed-up box assembly in the present invention;

[0019] Figure 3 It is a schematic diagram of the speed-up box assembly of the present invention.

[0020] Markings in the attached drawings:

[0021] Left dynamometer 1, left half-shaft connecting flange 2, left half-shaft 3, reducer assembly A, reducer 4, reducer connecting flange 5, connecting component 6, gear box connecting flange 7, gear box assembly B, gear box 8, left box 8a, first shaft 8b, second shaft 8c, right box 8d, gear box connecting plate 9, gear box input flange 10, input dynamometer 11, right half-shaft 12, right half-shaft connecting flange 13, right dynamometer 14. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 3 The present invention is further described.

[0023] The pure electric reducer NVH test tooling includes a left dynamometer 1, a left half-shaft connecting flange 2, a left half-shaft 3, a reducer assembly A, a gearbox assembly B, a gearbox connecting plate 9, a right half-shaft 12, a right half-shaft connecting flange 13, a right dynamometer 14, a gearbox input flange 10, and an input dynamometer 11. The left dynamometer 1 is connected to one end of the left half-shaft 3 through the left half-shaft connecting flange 2, and the other end of the left half-shaft 3 is connected to the reducer assembly A, the right dynamometer 14 is connected to the right half-shaft 12 through the right half-shaft connecting flange 13, and the other end of the right half-shaft 12 is connected to the reducer assembly A, and the reducer assembly A is connected to the gearbox assembly B.

[0024] The input dynamometer 11 is connected to the gearbox assembly B through the gearbox input flange 10. The main shaft of the input dynamometer 11 is fixed to the gearbox input flange 10 by priority bolts. The number of bolts is preferably 6. The gearbox assembly B is fixed to the input dynamometer 11 through the gearbox connecting plate 9.

[0025] The reducer assembly A includes a reducer 4, a reducer connecting flange 5, a connecting component 6, and a speed-up case connecting flange 7. One end of the reducer connecting flange 5 is located inside the reducer 4 and connected to the reducer 4. The speed-up case connecting flange 7 is fixedly connected to the other end of the reducer connecting flange 5. One end of the connecting component 6 is fixed to the reducer 4, and the other end of the connecting component 6 is fixed to the speed-up case assembly.

[0026] The gearbox assembly B includes a gearbox 8, which includes a left box 8a, a first shaft 8b, a second shaft 8c, and a right box 8d. The left box 8a is fixed to the right box 8d, a portion of the first shaft 8b is located in the left box 8a, one end of the first shaft 8b is connected to the gearbox input flange 10, a portion of the second shaft 8c is located in the right box 8d, one end of the second shaft 8c is connected to the reducer assembly, and the first shaft 8b and the second shaft 8c are in transmission cooperation. One end of the first shaft 8b is connected to the gearbox input flange 10 through a spline. Gears are provided on the first shaft 8b and the second shaft 8c, and the first shaft 8b and the second shaft 8c form a transmission cooperation through the meshing of the gears. The second shaft 8c cooperates with the gearbox connecting flange 7, and the second shaft 8c and the gearbox connecting flange 7 are preferably splined.

[0027] The pure electric reducer NVH test tooling of the present invention has a simple structure, light weight, strong versatility, and is easy to replace. It can meet the NVH test requirements of reducers with a small center distance. By replacing the connecting component 6, it can meet the use of reducers of different models. By optimizing the structure of the speed-up box assembly, it can be promoted to use in other test equipment.

Claims

1. A pure electric reducer NVH test fixture, comprising a left dynamometer (1), a left half-shaft connecting flange (2), a left half-shaft (3), a reducer assembly (A), a gearbox assembly (B), a gearbox connecting plate (9), a right half-shaft (12), a right half-shaft connecting flange (13), and a right dynamometer (14); the left dynamometer (1) is connected to one end of the left half-shaft (3) through the left half-shaft connecting flange (2), the other end of the left half-shaft (3) is connected to the reducer assembly (A), the right dynamometer (14) is connected to the right half-shaft (12) through the right half-shaft connecting flange (13), the other end of the right half-shaft (12) is connected to the reducer assembly (A), and the reducer assembly (A) is connected to the gearbox assembly (B), characterized in that: It also includes a gearbox input flange (10) and an input dynamometer (11), wherein the input dynamometer (11) is connected to the gearbox assembly via the gearbox input flange (10), and the gearbox assembly (B) is fixed to the input dynamometer (11) via a gearbox connecting plate (9); The reducer assembly (A) comprises: a reducer (4), a reducer connecting flange (5), a connecting component (6), and a speed-up case connecting flange (7), wherein one end of the reducer connecting flange (5) is located in the reducer (4) and connected to the reducer (4), the speed-up case connecting flange (7) is fixedly connected to the other end of the reducer connecting flange (5), one end of the connecting component (6) is fixed to the reducer (4), and the other end of the connecting component (6) is fixed to the speed-up case assembly; The gearbox assembly (B) comprises: a gearbox (8), the gearbox (8) comprising a left box (8a), a first shaft (8b), a second shaft (8c), and a right box (8d), the left box (8a) and the right box (8d) being fixed, a portion of the first shaft (8b) being located in the left box (8a), one end of the first shaft (8b) being connected to the gearbox input flange (10), a portion of the second shaft (8c) being located in the right box (8d), one end of the second shaft (8c) being connected to the reducer assembly, and the first shaft (8b) and the second shaft (8c) being in transmission cooperation.

2. The pure electric reducer NVH test fixture according to claim 1, characterized in that: One end of the first shaft (8b) is connected to the speed-changing box input flange (10) via a spline.

3. The pure electric reducer NVH test fixture according to claim 1, characterized in that: Gears are provided on both the first shaft (8b) and the second shaft (8c), and the first shaft (8b) and the second shaft (8c) form a transmission fit through the meshing of the gears.

4. The pure electric reducer NVH test fixture according to claim 1, characterized in that: The main shaft of the input dynamometer (11) is fixed to the gearbox input flange (10) by bolts.

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