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CN-121989651-A - High-performance mounting bracket with thermal variable rigidity and control method thereof

CN121989651ACN 121989651 ACN121989651 ACN 121989651ACN-121989651-A

Abstract

The invention discloses a high-performance mounting bracket with thermal variable rigidity and a control method thereof, relates to the technical field of vibration damping equipment, and aims to solve the technical problem that an existing vehicle-mounted motor vibration damping bracket cannot be adaptively adjusted along with temperature change. The invention realizes temperature self-adaptive rigidity switching through the TiNiNb shape memory alloy pulling column, low-temperature rigidity fixed shock resistance and high-temperature flexible vibration reduction, adapts to different temperature range vibration characteristics of a motor, forms double vibration reduction by a vibration reduction gasket and an air damping mechanism, greatly improves the high-frequency broadband vibration attenuation effect by triple damping effect, realizes forced air circulation by motor vibration, rapidly discharges vibration reduction and heat generation, ensures high-temperature vibration reduction stability, converts vibration into reverse rotation force of a radial vibration reduction ring by matching a vibration wave mechanism with a unidirectional shaft ring, counteracts radial vibration force of rotor eccentricity from a source, and realizes accurate radial vibration reduction.

Inventors

  • ZHENG JUNWEI

Assignees

  • 象山华民汽车配件有限公司

Dates

Publication Date
20260508
Application Date
20260305

Claims (10)

  1. 1. The high-performance mounting bracket with the thermal variable rigidity is characterized by comprising a vibration reduction ring (1) formed by two semi-rings, wherein one side of the vibration reduction ring (1) is connected with an external connecting frame (2) fixed with an external vehicle body, an elastic vibration reduction gasket (3) is adhered to the inner periphery of the vibration reduction ring (1), the inside of the vibration reduction ring (1) is of a hollow structure, a plurality of rigid fixing columns (4) used for fixing a vibration source are arranged at the two ends of the vibration reduction ring (1), one end of each rigid fixing column (4) is positioned inside the vibration reduction ring (1) and is connected with a rotary arc plate (5), one side of the rotary arc plate (5) is provided with an inclined pressure section (51), and a plurality of conversion mechanisms (6) are arranged on the outer periphery of the pressure section (51) on the same side; The conversion mechanism (6) comprises a transverse shaft positioning ring (601), a rotary moving lantern ring (602) is arranged on one side of the transverse shaft positioning ring (601), a drawing column (603) is connected between the rotary moving lantern ring (602) and the transverse shaft positioning ring (601), the drawing column (603) is made of a thermal-induced material, the drawing column (603) is of a spiral structure surrounding the axis of the vibration reduction ring (1), an extending ring (604) is arranged on one side of the rotary moving lantern ring (602), and a tight top surface (605) which is integrally formed on one side of the extending ring (604) and is attached to the pressure section (51).
  2. 2. The high-performance mounting bracket with the thermal variable rigidity according to claim 1, wherein an axial constraint ring (7) is fixed on the inner wall of the vibration reduction ring (1), a plurality of sliding grooves are formed in the axial constraint ring (7), the transverse shaft positioning ring (601) slides in the sliding grooves Zhou Xianwei, and an elastic pulling piece (71) is connected between the transverse shaft positioning ring (601) and the vibration reduction ring (1).
  3. 3. The high-performance mounting bracket with the thermal variable rigidity according to claim 2, wherein the inner ring of the screwing collar (602) is integrally formed with a screwing protrusion (81), a plurality of spiral screwing spiral grooves (82) matched with the screwing protrusion (81) are formed in the inner wall of the cavity of the vibration reduction ring (1), and the screwing direction of the screwing spiral grooves (82) is the same as the thermal variable screwing direction of the drawing column (603).
  4. 4. A high performance mounting bracket with thermal variable stiffness according to claim 3, wherein a plurality of air damping mechanisms (9) are arranged on the vibration damping washer (3), the air damping mechanisms (9) comprise jacking bosses (901) embedded on the vibration damping washer (3), the jacking bosses (901) are made of compressible materials, one ends of the jacking bosses (901) are protruded to the inner ring of the vibration damping ring (1), and the part, close to the jacking bosses (901), of the vibration damping ring (1) is provided with an elastic layer (902) capable of elastic deformation.
  5. 5. The high-performance mounting bracket with the thermal variable rigidity according to claim 4, wherein a plurality of ventilation air bags (10) are arranged on two sides of the vibration reduction ring (1), and an air compressing plate (11) connected with the arc rotating plate (5) is arranged on the outer side of the ventilation air bags (10).
  6. 6. The high-performance mounting bracket with the thermal variable rigidity according to claim 5, wherein the ventilation air bag (10) comprises an air bag body (101), two air ports (102) are communicated with the periphery of the air bag body (101), the two air ports (102) are respectively positioned outside the vibration reduction ring (1) and in a cavity of the vibration reduction ring (1), one-way valves are arranged at the ends of the air ports (102), and the flow limiting directions of the one-way valves on the two ends of the ventilation air bag (10) are opposite to form a flow passage.
  7. 7. The high-performance mounting bracket with the thermal variable rigidity according to claim 6, wherein two unidirectional shaft rings (12) are arranged in the center of an inner cavity of the vibration reduction ring (1), radial vibration reduction rings (13) are fixed on inner rings of the unidirectional shaft rings (12), vibration wave mechanisms (14) are arranged between the two radial vibration reduction rings (13), a plurality of screw movement grooves (121) are formed in the outer side wall of the inner cavity of the vibration reduction ring (1), a plurality of screw movement protrusions (122) are protruded out of the unidirectional shaft rings (12), and the screw movement protrusions (122) move along the track of the screw movement grooves (121).
  8. 8. The high-performance mounting bracket with the thermal variable rigidity according to claim 7, wherein the vibration wave mechanism (14) comprises a movable ring (141), the movable ring (141) and the unidirectional shaft collar (12) slide in a limited manner, a stress ring (142) is fixed on an inner ring of the movable ring (141), an inclined plane is arranged on one side of the bottom of the stress ring (142), a fluctuation piece (143) is arranged between the two stress rings (142), and a jacking column (144) capable of propping against the unidirectional shaft collar (12) is connected on one side of the transverse shaft positioning ring (601).
  9. 9. The high-performance mounting bracket with thermally variable stiffness according to claim 8, wherein the wave member (143) comprises a counterweight arc plate (1431), two sides of the counterweight arc plate (1431) are connected with inclined sliding seats (1432), and the inclined sliding seats (1432) slide with inclined surfaces of the stress ring (142) in a limiting manner.
  10. 10. A control method for using a thermally variable rigid high performance mounting bracket according to any of the preceding claims 1-9, comprising the steps of: s1, when the temperature is less than or equal to 0 ℃, the pulling column (603) has no rotary displacement, the rotary lantern ring (602) is kept fixed, the tight top surface (605) is tightly attached to the pressing section (51), the rigid fixing column (4) has no axial displacement, and two ends of the vehicle-mounted motor are pressed; S2, transferring heat to a pull column (603) to enable the pull column to be deformed in a rotating mode, enabling a rotating lantern ring (602) to rotate in a spiral mode along a rotating spiral groove (82), enabling an extension ring (604) to move in a direction away from a rotating arc plate (5), and gradually separating a tight top surface (605) from a pressing section (51); s3.1, small horizontal displacement of the transverse shaft positioning ring (601) along the sliding groove of the axial constraint ring (7) and deformation of the elastic pull piece (71) along with the sliding groove, elastic resetting of the vibration damping gasket (3), small radial fluctuation of the jacking convex head (901) and small protrusion-flat complex deformation of the elastic layer (902); S3.2, the expansion displacement amplitude of the air bag body (101) of the ventilation air bag (10) is increased, the air exchange quantity of the air port (102) is increased, and ventilation is realized; S3.3, the fluctuation amplitude of the counterweight arc plate (1431) is increased, the inclined slide seat (1432) slides along the inclined plane of the stress ring (142) to push the stress ring (142) to axially separate, the unidirectional shaft collar (12) moves slightly along the spiral moving groove (121) in a rotating way, and the radial vibration damping ring (13) slightly rotates along with the spiral moving groove.

Description

High-performance mounting bracket with thermal variable rigidity and control method thereof Technical Field The invention relates to the technical field of vibration reduction equipment, in particular to a high-performance mounting bracket with thermally variable rigidity and a control method thereof. Background In the new energy automobile power system, the vehicle-mounted driving motor is used as a whole automobile core power component, and the running stability of the vehicle-mounted driving motor directly influences the NVH performance, the riding comfort and the running safety of the whole automobile. In the working process of the driving motor, various complex vibrations are generated simultaneously, such as broadband vibration caused by electromagnetic excitation, radial vibration caused by rotor eccentricity, and torsional impact vibration caused by frequent start-stop and acceleration and deceleration. Meanwhile, the working environment temperature of the motor is changed drastically along with the load, seasons and working conditions within the wide range of-40 ℃ to 120 ℃, and extremely high requirements are provided for vibration reduction and supporting performance of the matched mounting bracket. At present, a conventional mounting bracket mostly adopts a fixed rigidity structure, the rigidity characteristic does not change along with temperature, and the rigidity characteristic cannot be matched with the vibration characteristics of a driving motor at different temperatures, so that the vibration reduction effect is poor, and the structural cooperativity is insufficient. Particularly, under the temperature change, the motor vibration characteristics are significantly different. When the temperature is lower than 0 ℃, the viscosity of lubricating oil in the motor is increased, the bearing damping is increased, the impact torque is larger in the start-stop stage, the vibration is mainly low-frequency and high-impact, the viscosity of the lubricating oil is reduced under the normal temperature/high temperature working condition, the rotating speed response of the motor is faster, and the vibration is mainly high-frequency and wide-frequency. The conventional bracket has fixed rigidity, can not provide enough impact rigidity at low temperature, and can not provide proper flexible vibration reduction at normal temperature/high temperature, so that the vibration reduction effect greatly fluctuates with temperature. In addition, the conventional bracket is not enough in the fitting degree with the shell and the flange of the cylindrical motor, and the stress and the force transmission path are uneven, so that the vibration reduction effect is further weakened. The motor vibration can not be well and effectively attenuated, resonance and abnormal sound are caused when the motor vibration is transmitted to a vehicle body, driving comfort is reduced, fatigue damage of a bracket, a flange and a shell can be accelerated by long-term alternating vibration and impact, cracking and loosening occur, the service lives of a bearing, a stator, a rotor and peripheral parts in the motor can be influenced by vibration, abnormal sound, abrasion and even failure are caused, and the reliability and safety of the whole vehicle are seriously threatened. In view of the above, we propose a thermally-induced-stiffness high-performance mounting bracket and a control method thereof. Disclosure of Invention The invention aims to provide a high-performance mounting bracket with thermal variable rigidity and a control method thereof, so as to solve the technical problem that the conventional vehicle-mounted motor vibration reduction bracket cannot be adaptively adjusted along with temperature change. In order to solve the technical problems, the invention provides the technical scheme that the high-performance mounting bracket with the thermal variable rigidity comprises a vibration reduction ring which consists of two semi-rings, wherein one side of the vibration reduction ring is connected with an external connecting frame fixed with an external vehicle body, an elastic vibration reduction gasket is adhered to the inner periphery of the vibration reduction ring, the inside of the vibration reduction ring is of a hollow structure, a plurality of rigid fixing columns used for fixing a vibration source are arranged at the two ends of the vibration reduction ring, one end of each rigid fixing column is positioned in the vibration reduction ring and is connected with a rotary arc plate, one side of the rotary arc plate is provided with an inclined pressure section, and the periphery of the plurality of pressure sections on the same side is provided with a conversion mechanism; The conversion mechanism comprises a transverse shaft positioning ring, a rotary moving lantern ring is arranged on one side of the transverse shaft positioning ring, a pulling column is connected between the rotary moving lantern ring and the transverse sha