Broadband centralized bearing direct-drive vibration reduction actuator

Abstract

The utility model discloses a broadband centralized bearing direct-drive vibration reduction actuator, which belongs to the technical field of vibration reduction actuators, and comprises two groups of vibration reduction components with the same structure, each vibration reduction component comprises two frameless motors positioned on the same plane, rotors of the frameless motors are connected with eccentric mass blocks through eccentric shafts, and the eccentric mass blocks are connected with the bearings through bearings. The two eccentric mass blocks are located on the same plane, the frameless motor is installed in a casing, the casing is connected with a stator of the frameless motor in a centering mode, a plurality of bearings which are arranged adjacently are arranged in the casing, and the bearings are connected with the eccentric shaft. According to the broadband centralized bearing direct-driven vibration reduction actuator provided by the utility model, the rotor of the frameless motor drives the eccentric mass blocks to rotate, the rotor of the frameless motor and the eccentric mass blocks are supported by the centralized bearings, and the two groups of same mass blocks output broadband output forces with adjustable centrifugal force included angles. And the vibration force is counteracted with the vibration force in a use environment to realize active vibration reduction.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock-absorbing actuators, and in particular relates to a broadband centralized bearing direct-driven shock-absorbing actuator. Background Art

[0002] In a vibration environment, vibration reduction actuators are usually installed to reduce the vibration of the vibrating components so as to change the vibration state of the vibrating components.

[0003] The existing vibration damping actuator, such as the bracket spring adjustable vibration damping actuator disclosed in the previous patent with application number CN200920087710.7, comprises a vibration damping actuator body, a connecting seat, a suspension spring, a spring cover and an adjusting knob, wherein the suspension spring is sleeved on the vibration damping actuator body, the spring cover is located on the upper side of the suspension spring and sleeved on the piston rod of the vibration damping actuator body, the adjusting knob is located on the lower side of the suspension spring and is threadedly connected to the vibration damping actuator body, a thread is provided in the connecting seat, and the connecting seat is threadedly connected to the lower end of the vibration damping actuator body through its thread, and the vibration damping performance of the vibration damping actuator can be adjusted by the adjusting knob and can also be adjusted by rotating the connecting seat. However, the vibration damping actuator adopts a passive adjustment method, which cannot completely eliminate the vibration of the vibrating component, and the adjustment range of the vibration damping performance is limited, requiring manual adjustment.

[0004] Another example is an adjustable hydraulic vibration reduction actuator disclosed in a previous patent with application number CN200710069026.1, which includes a guide, a sealing ring and a sealing ring cap. Among them, there is a countersunk hole at the connection end between the guide and the working cylinder, and there are multiple grooves radially on this end face, the groove depth is the same as the depth of the countersunk hole, the thickness of the sealing ring is less than the inner hole height of the sealing ring cap, the sealing ring is located in the countersunk hole of the guide, and after the sealing ring cap is pressed into the countersunk hole of the guide, the sealing ring should be able to float up and down in the countersunk hole of the guide. This vibration reduction actuator also adopts a passive adjustment method, which cannot completely eliminate the vibration of the vibrating component. The adjustment range of the vibration reduction performance is limited and requires manual adjustment.

[0005] In recent years, some domestic companies have conducted research on active vibration reduction actuators, such as a vibration reduction actuator disclosed in the previous patent with application number CN201920878072.4, which includes a motor, a transmission assembly and two mass blocks. The output end of the motor is connected to the transmission assembly, and the transmission assembly is connected to the two mass blocks, so that the motor can drive the two mass blocks to rotate at the same time through the transmission assembly. The two mass blocks have the same mass, and the two mass blocks are arranged side by side. And the two mass blocks can rotate with the same rotation radius, the same speed and in opposite directions. The shock absorber realizes active vibration reduction, but the gear-based transmission assembly will inevitably bring noise. At the same time, the volume, weight and power consumption require larger parameters to achieve, which has certain limitations in practical applications.

[0006] Another example is a vibration reduction actuator disclosed in the previous patent with application number CN202120268822.3. The vibration reduction actuator drives the mass block to rotate through the rotor of the frameless motor. The rotor and mass block of the frameless motor are both supported by the inner bearing. A group of identical mass blocks output a wide-band output force with an adjustable centrifugal force angle, which offsets the vibration force in the use environment and realizes active vibration reduction. The motor driven mass block used in the vibration reduction actuator outputs the vibration reduction force, realizes active vibration reduction, and solves the problems of slow response and narrow frequency band of passive vibration reduction. The inner bearing direct drive method adopted solves the problems of high noise, large volume, large weight and high power consumption of the gear-based transmission assembly. However, the vibration reduction actuator outputs a wide-band output force with an adjustable centrifugal force angle through a group of identical mass blocks, and the amplitude bandwidth of the vibration reduction force is narrow. At the same time, two groups of vibration reduction actuators are required to cooperate in applications with high amplitude bandwidth of the vibration reduction force. The integration is low and there are certain limitations in practical applications.

[0007] Therefore, there is an urgent need for a vibration reduction actuator to solve the above problems. Utility Model Content

[0008] The utility model aims at the deficiencies of the prior art and provides a wide-band centralized bearing direct-drive vibration reduction actuator.

[0009] The utility model is realized by the following technical solutions:

[0010] A broadband centralized bearing direct-drive vibration reduction actuator comprises two groups of vibration reduction components with the same structure, wherein the vibration reduction components comprise two frameless motors located in the same plane, the rotors of the frameless motors are connected to eccentric mass blocks via eccentric shafts, the two eccentric mass blocks are located in the same plane, the frameless motor is installed in a casing, the casing is centrally connected to the stator of the frameless motor, a plurality of closely arranged bearings are provided in the casing, and the bearings are connected to the eccentric shafts.

[0011] Furthermore, the eccentric mass block is composed of a chassis and an eccentric block arranged on the chassis. The eccentric block is in a semicircular ring shape and is arranged on the outer edge of the chassis.

[0012] Furthermore, the receiver is provided with a receiver cover.

[0013] Furthermore, the two groups of vibration reduction components are arranged opposite to each other and installed in the same housing.

[0014] Furthermore, a partition is provided in the middle of the shell.

[0015] Furthermore, sealing covers are provided at both ends of the shell.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The broadband centralized bearing direct-drive vibration reduction actuator provided by the utility model drives the eccentric mass block to rotate through the rotor of the frameless motor. The rotor and the eccentric mass block of the frameless motor are both supported by centralized bearings. Two groups of identical eccentric mass blocks output broadband output force with adjustable centrifugal force angles, which offset the vibration force in the use environment to achieve active vibration reduction.

[0018] The wide-band centralized bearing direct-drive vibration reduction actuator provided by the utility model adopts an electric motor to drive an eccentric mass block to output vibration reduction force, thereby realizing active vibration reduction and solving the problems of slow response and narrow frequency band of passive vibration reduction. The centralized bearing direct-drive mode adopted solves the problems of high noise, large volume, large weight and high power consumption of transmission components mainly composed of gears. The two sets of identical integrated eccentric mass blocks are adopted to solve the problems of narrow amplitude of output vibration reduction force and low integration.

[0019] The broadband centralized bearing direct-drive vibration reduction actuator provided by the utility model adopts a combined design of a frameless motor and a centralized bearing, and optimizes the structure of the eccentric mass block, fully utilizing the internal space, greatly reducing the structural volume, and facilitating the output of a greater vibration reduction force in a smaller usage space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 This is a schematic structural diagram of a vibration reduction actuator in an embodiment of the utility model;

[0022] Reference numerals in the figure: 1-end cover, 2-casing cover, 3-bearing, 4-casing, 5-motor rotor, 6-motor stator, 7-eccentric mass block, 8-eccentric shaft, 9-casing. DETAILED DESCRIPTION

[0023] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Reference Figure 1 The utility model discloses a specific embodiment of a broadband centralized bearing direct-drive vibration reduction actuator, the actuator comprises two groups of vibration reduction components, namely a first group of vibration reduction components and a second group of vibration reduction components, wherein the first group of vibration reduction components and the second group of vibration reduction components have the same structure.

[0025] The first set of vibration reduction components and the second set of vibration reduction components are arranged oppositely and installed in the same housing 9. Each set of vibration reduction components includes two frameless motors located in the casing 4. The two frameless motors are located in the same plane. The motor stator 6 is connected to the casing 4 in a centering manner. The motor rotor 5 is connected to the eccentric shaft 8. The eccentric shaft 8 is connected to the mass block 7. The output radial support and axial limit are provided by the combined installation of two bearings 3 arranged closely in the casing 4, the motor rotor 5 and the casing 4, so that the motor rotor 5 drives the eccentric mass block 7 to rotate. The eccentric mass block 7 is composed of a chassis and an eccentric block arranged on the chassis. The eccentric block is in a semicircular ring shape and is arranged on the outer edge of the chassis. The two eccentric mass blocks in each vibration reduction component are also located in the same plane. The casing 4 is provided with a casing cover 2 for encapsulating the frameless motor and the built-in bearing 3. A partition is provided in the middle of the casing 9, and the first vibration reduction component and the second vibration reduction component are relatively installed on both sides of the partition. End covers 1 for encapsulation are provided at both ends of the casing 9.

[0026] The control circuit drives the frameless motor to respond to different rotation frequencies and phase angles according to instructions; the frameless motor drives the eccentric mass block to rotate at the same speed in real time through the eccentric shaft, achieving a stable response frequency accuracy of up to 0.1% and a 108-degree phase response time of up to 0.3s.

[0027] In this embodiment, when the eccentric mass block rotates around the axis, the centrifugal force curve outputs a sinusoidal output force in the plane around the axis. At the same time, the outer structure of the eccentric mass block is similar to the outer edge of the nested "parasitic" rotating eccentric shaft, and the thickness is equivalent to the thickness of the frameless motor, so that the thickness does not increase, and the size is only increased in the radial direction. The increase in size is designed according to the maximum output force index constraint, and the output force of one mass block can reach 1000N.

[0028] The control circuit collects the rotation angle and position of the frameless motor in real time through the Hall angle sensor and high-precision magnetic encoder in the frameless motor stator, and realizes real-time control of the motor rotation frequency and phase angle through the control algorithm to meet the requirements of the control instructions.

[0029] The integrated centralized bearing direct-drive vibration reduction actuator described in this embodiment is symmetrical in rotation structure design, including four sets of "frameless motor + eccentric mass block", and the four sets of "frameless motor + eccentric mass block" rotate coaxially. The control circuit controls the rotation of the four eccentric mass blocks respectively, responding to the same rotation frequency and different phase angles, thereby achieving the output of a variable sinusoidal output force in the plane around the axis at the same rotation frequency.

[0030] In a vibration environment, an "integrated centralized bearing direct-drive vibration reduction actuator" controls four eccentric mass blocks to respond in real time to the same frequency, achieve the output force, and then achieve a sinusoidal output force at a certain angle in the plane around the axis. The rotation frequency, phase angle and a certain angle in the plane around the axis in the corresponding instructions are exactly the same as the vibration frequency and vibration force angle of the vibration environment, but the phase angle differs by 180 degrees, achieving active cancellation of the environmental vibration force, and then achieving active vibration reduction.

[0031] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A broadband centralized bearing direct-drive vibration reduction actuator, characterized in that: The invention comprises two groups of vibration reduction components with the same structure, wherein the vibration reduction components comprise two frameless motors located in the same plane, the rotors of the frameless motors are connected to eccentric mass blocks via eccentric shafts, the two eccentric mass blocks are located in the same plane, the frameless motors are installed in a casing, the casing is connected to the stator of the frameless motor in a centering manner, a plurality of closely arranged bearings are arranged in the casing, and the bearings are connected to the eccentric shafts.

2. A broadband centralized bearing direct-drive vibration reduction actuator according to claim 1, characterized in that: The eccentric mass block is composed of a chassis and an eccentric block arranged on the chassis. The eccentric block is in a semicircular ring shape and is arranged on the outer edge of the chassis.

3. A broadband centralized bearing direct-drive vibration reduction actuator according to claim 1, characterized in that: The receiver is provided with a receiver cover.

4. A broadband centralized bearing direct-drive vibration reduction actuator according to claim 1, characterized in that: The two groups of vibration reduction components are arranged opposite to each other and installed in the same housing.

5. A broadband centralized bearing direct-drive vibration reduction actuator according to claim 4, characterized in that: A partition is arranged in the middle of the shell.

6. A broadband centralized bearing direct-drive vibration reduction actuator according to claim 4, characterized in that: Sealing covers are arranged at both ends of the shell.

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