一种滑动式电机悬置高频夹具
By designing a sliding motor suspension high-frequency fixture, the problem of resonance interference in high-frequency NVH analysis of electric vehicles using traditional fixtures was solved, achieving both accuracy and ease of operation in high-frequency dynamic stiffness testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ASIMCO NVH TECH CO LTD ANHUI
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional fixture systems cannot meet the needs of high-frequency NVH analysis of electric vehicles, especially in dynamic stiffness testing in the frequency band above 1500Hz, which is prone to introducing resonance interference and causing test data distortion.
Design a sliding motor suspension high-frequency fixture, including a tooling base, a limiting component, a limiting shaft, and a dynamic force sensor. The limiting component restricts the axial and radial movement of the suspension bushing, and the limiting shaft and positioning assembly enable rapid fixing. An acceleration sensor and a dynamic force sensor are used to measure the high-frequency dynamic stiffness.
It effectively suppresses the self-resonance of the fixture, ensures the stability of boundary conditions, simplifies the clamping process, improves the accuracy and efficiency of testing, and provides accurate high-frequency dynamic stiffness data.
Smart Images
Figure CN224509436U_ABST
Abstract
Claims
1. A sliding motor suspension high frequency fixture, comprising a tool base (200) mounted on the top of a shaker (100), characterized in that, A top plate (300) is provided above the tooling base (200). A limiting member (400) symmetrically arranged with respect to the tooling base (200) is slidably installed below the top plate (300). The limiting member (400) is used to restrict the axial movement of the suspension bushing (500) in the tooling base (200). A limiting shaft (600) for limiting its radial displacement is provided inside the suspension bushing (500). The limiting shaft (600) is set through two limiting members (400). A movable sleeve (700) matching the limiting shaft (600) is installed in one of the limiting members (400). A positioning component (800) to prevent its movement is installed on the limiting shaft (600). A dynamic force sensor (900) is installed between the top plate (300) and the limiting member (400). An acceleration sensor (1000) is installed on the tooling base (200).
2. A sliding motor suspended high frequency fixture according to claim 1, characterized in that, The tooling base (200) includes a connecting plate (201), an annular seat (202), and a support base (204) with a mounting hole (203). The connecting plate (201) is connected to the vibrator (100). The annular seat (202) is mounted on the top of the connecting plate (201). The support base (204) is connected to the top of the annular seat (202). The mounting hole (203) is provided through the end of the support base (204) away from the annular seat (202), and the suspension bushing (500) is coaxially placed in the mounting hole (203).
3. A sliding motor suspended high frequency fixture according to claim 1, wherein, The limiting member (400) includes a side baffle (402) with a through hole (401) and a limiting sleeve (403). The through hole (401) is opened at the bottom end of the side baffle (402). The movable sleeve (700) is inserted into the through hole (401). The limiting sleeve (403) is installed on the side of the side baffle (402) near the tooling base (200) and is used to limit the axial movement of the suspension bushing (500).
4. A sliding motor suspension high frequency clamp according to claim 3, characterized in that, The limiting sleeve (403), through hole (401) and suspension bushing (500) are all coaxially arranged, and the inner diameter of the limiting sleeve (403) is not less than the outer diameter of the limiting shaft (600).
5. A sliding motor suspended high frequency fixture according to claim 3, wherein The top of the side baffle (402) is provided with a lower groove (404), and the bottom of the top plate (300) is provided with an upper groove (301) corresponding to the lower groove (404). The dynamic force sensor (900) is installed at the bottom of the upper groove (301), and the detection end of the dynamic force sensor (900) is in contact with the bottom of the lower groove (404).
6. A sliding motor suspended high frequency clamp according to claim 5, wherein The lower groove (404) has symmetrically arranged protruding edges (405) distributed along its length at the groove opening. The protruding edges (405) extend into the upper groove (301) and are slidably connected to the upper groove (301).
7. A sliding motor suspended high frequency fixture according to claim 1, wherein A bearing seat (302) is installed on the upper surface of the top plate (300), and a preload mass block for simulating the static load of the suspension bushing (500) of the whole vehicle is installed on the bearing seat (302).
8. A sliding motor suspended high frequency fixture according to claim 1, wherein, The limiting shaft (600) includes a threaded section (601) and a smooth section (602). The two threaded sections (601) are coaxially arranged at both ends of the smooth section (602). The smooth section (602) passes through the suspension bushing (500) and its two ends extend into the two limiting members (400) respectively.
9. A sliding motor suspended high frequency clamp according to claim 8, characterized in that, The positioning component (800) includes a nut (801) and a pressure ring (802). The nut (801) is threadedly sleeved with the threaded section (601), and the pressure ring (802) is movably sleeved (700) with the threaded section (601). The pressure ring (802) is located between the nut (801) and the limiting member (400).
10. A sliding motor suspended high frequency clamp according to claim 8, wherein The outer diameter of the smooth section (602) is equal to the inner diameter of the suspension bushing (500) and the movable sleeve (700).