Active and passive integrated vibration isolation platform based on soft and hard rubber and voice coil motor

Abstract

The invention discloses an active and passive integrated vibration isolation device based on soft and hard rubber and a voice coil motor. The active and passive integrated vibration isolation device comprises a bottom plate, a supporting ring and six supporting legs, and each supporting leg comprises a gapless spherical hinge, a piston, a piston upper cover, a linear motion bearing, soft rubber, hard rubber, an outer sleeve, an outer sleeve lower cover, an impedance head and a vibration isolation device connecting part; the gapless spherical hinges at the two ends of the single supporting leg are connected with the bottom plate and the supporting ring through connecting blocks. The linear motion bearing is mounted at the upper part of the outer sleeve; rubber on two sides of the linear motion bearing is symmetrically arranged; the piston rod penetrates through the center of the bearing; the gapless spherical hinge is inserted into the inner wall of the piston; the bottom of the piston is connected with a coil of the voice coil motor through screws. The voice coil motor permanent magnet is connected with the outer sleeve lower cover through a stud; the outer sleeve lower cover is connected with the outer sleeve through a fastening screw; the outer sleeve lower cover is connected with the impedance head through a stud; and the impedance head is connected with the gapless spherical hinge through the connecting block. The device has the characteristics of micro-vibration vibration isolation self-adaption, high efficiency and stable work.

Description

Technical Field

[0001] The invention relates to the field of vibration control, and in particular to an active and passive integrated vibration isolation device based on soft and hard rubber and a voice coil motor. Background Art

[0002] Vibration control has always been an important issue in industrial production. The harm of vibration can reduce industrial production efficiency at the least and threaten production safety at the worst. When the natural frequency of the vibration isolator is consistent with the forced vibration frequency of the equipment, it can reduce the vibration amplitude of the equipment at this frequency and play a good vibration isolation role. For vibrations with large frequency fluctuations, traditional vibration isolators can only isolate vibrations passively and cannot achieve good vibration isolation effects for vibrations in different frequency bands. Therefore, in order to increase the application range of vibration isolators, an active and passive integrated vibration isolation device is needed. Summary of the invention

[0003] The purpose of the present invention is to provide an active and passive integrated vibration isolation device, which can achieve vibration isolation for vibrations with a wider range of frequencies and accelerations.

[0004] The present invention adopts the following technical solutions:

[0005] An active and passive integrated vibration isolation device based on a voice coil motor and soft and hard rubber mainly comprises a base plate, a support ring, and six legs, wherein each leg comprises a gapless ball joint, a piston, a piston upper cover, a linear motion bearing, soft rubber, hard rubber, an outer sleeve, an outer sleeve lower cover, an impedance head, and a vibration isolation device connecting component; the gapless ball joints at both ends of a single leg are connected to the base plate and the support ring through a connecting block; the linear motion bearing is installed on the upper part of the outer sleeve; the rubbers on both sides of the linear motion bearing are symmetrically placed, and the piston rod passes through the center of the bearing; the piston rod is screwed into the piston upper cover; the gapless ball joint is inserted into the inner wall of the piston; the bottom of the piston is connected to the coil of the voice coil motor through a screw; the permanent magnet of the voice coil motor is connected to the outer sleeve lower cover through a stud; the outer sleeve lower cover is connected to the outer sleeve through a fastening screw; the outer sleeve lower cover is connected to the impedance head through a stud; the impedance head is connected to the gapless ball joint through a connecting block.

[0006] Furthermore, the base plate and the single leg of the present invention are connected via a three-way connecting block of independent design.

[0007] Furthermore, the present invention controls the output force of the motor by adjusting the bottom adjustment voice coil motor input current lai.

[0008] Furthermore, the lower end of the piston upper cover of the present invention is connected to the piston rod base through threads, so that the rubbers on both sides remain symmetrical.

[0009] Furthermore, the stiffness coefficients of the soft and hard rubbers of the present invention vary greatly, thereby achieving vibration isolation under different accelerations.

[0010] Furthermore, the base plate, outer sleeve, piston and vibration isolation platform connecting parts of the vibration isolator described in the present invention are all made of lightweight aluminum alloy.

[0011] Different from traditional vibration isolators, the soft and hard rubber of the vibration isolation device described in the present invention are symmetrically installed on the top of the outer sleeve. When vibrating, the rubbers at both ends are in a parallel state to improve the rigidity of the system. The device combines the passive vibration isolation of the rubber with the active vibration isolation of the voice coil motor. The force signal collected by the impedance head uses the LMS algorithm to calculate the output force of the voice coil motor. The present invention has the characteristics of self-adaptation of micro-vibration isolation, high efficiency and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic examples and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a general schematic diagram of the active and passive integrated vibration isolation device of the present invention;

[0014] Figure 2 It is a schematic diagram of a single leg according to the present invention;

[0015] Figure 3 A schematic diagram of the permanent magnet connection components of the voice coil motor claimed in the present invention;

[0016] Figure 4 This is a schematic diagram of the outer sleeve and piston installation method claimed in the present invention;

[0017] Figure 5 This is a schematic diagram of the assembly of the piston and the voice coil motor coil of the present invention;

[0018] Figure 6 This is a schematic diagram of the gapless ball joint claimed in the present invention.

[0019] Markings in the figure are: 1-base plate, 2-support ring, 3-clearance-free ball joint, 4-base connecting block, 5-linear bearing, 6-outer sleeve, 7-rubber, 8-piston rod, 9-piston upper cover, 10-voice coil motor coil, 11-voice coil motor permanent magnet, 12-outer sleeve lower cover, 13-impedance head, 14-connecting block. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0021] like Figures 1 to 6As shown, the active and passive integrated vibration isolation device described in the present invention mainly includes a base plate (1), a support ring (2), a gapless ball joint (3), an outer sleeve (6), rubber (7), a piston rod (8), a piston upper cover (9), an outer sleeve lower cover (12), and an impedance head (3). The gapless ball joints (3) at both ends of the single leg are connected to the bottom plate (1) and the support ring (2) through the base connecting block (4); the linear bearing (5) is installed on the upper part of the outer sleeve (6); the rubbers (7) on both sides of the linear motion bearing (5) are symmetrically placed; the piston rod (8) passes through the center of the linear bearing (5); the piston rod (8) is screwed into the piston upper cover (9); the gapless ball joint (3) is inserted into the inner wall of the piston rod (8); the base of the piston rod (8) is connected to the coil (10) of the voice coil motor through screws; the voice coil motor permanent magnet (11) is connected to the outer sleeve lower cover (12) through studs; the outer sleeve lower cover (12) is connected to the outer sleeve (6) through fastening screws; the outer sleeve lower cover (12) is connected to the impedance head (13) through studs; the impedance head (13) is connected to the gapless ball joint (3) through a connecting block (14).

[0022] The active and passive integrated vibration isolation device based on soft and hard rubber and a voice coil motor provided by the present invention is different from a traditional vibration isolator in that the soft and hard rubber of the vibration isolation device of the present invention are symmetrically installed and placed on the top of the outer sleeve, and the rubbers at both ends are in a parallel state during vibration, thereby improving the stiffness of the system; the device combines the passive vibration isolation of the rubber with the active vibration isolation of the voice coil motor; the force signal collected by the impedance head uses the LMS algorithm to calculate the output force of the voice coil motor; the present invention has the characteristics of self-adaptation of micro-vibration isolation, high efficiency and stable operation.

[0023] In the past, other vibration isolation technologies mainly considered the isolation of the micro-amplitude, wide-band vibration of the control moment gyro in the orbit section, ignoring the large impact load borne during the satellite launch process. This design takes into account the vibration isolation needs of both the orbit section and the launch section, and configures the soft and hard rubber gradient to achieve coordinated vibration reduction of the soft and hard rubber in the launch section. In the orbit section, the force generated by the vibration is very small, so only the soft rubber plays a passive vibration isolation effect. The soft rubber and the voice coil motor are connected in parallel to achieve active and passive integrated vibration isolation in the orbit section.

[0024] The above description is only one embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. However, it can be considered that various modes of the principles disclosed here are still within the scope of the claims.

Claims

1. An active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor, wherein the gapless ball joints (3) at both ends of a single leg are connected to a base plate (1) and a support ring (2) through a base connection block (4), a flange of a linear motion bearing (5) is embedded in a slot of an outer sleeve (6), rubbers (7) on both sides of the linear motion bearing (5) are symmetrically placed, a piston rod (8) passes through the linear motion bearing (5) from the inside of the outer sleeve (6) and is screwed into a piston upper cover (9), and the gapless ball joint (3) is inserted into the piston The inner wall of the rod (8), the base of the piston rod (8) is connected to the voice coil motor coil (10) by screws, the voice coil motor coil (10) is placed in the voice coil motor permanent magnet, (11) the voice coil motor permanent magnet (11) is connected to the outer sleeve lower cover (12) by studs, the outer sleeve lower cover (12) is connected to the outer sleeve (6) by fastening screws, the outer sleeve lower cover (12) is connected to the impedance head (13) by studs; the impedance head (13) is connected to the gapless ball joint (3) by a connecting block (14).

2. According to claim 1, an active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor is characterized in that: A gapless ball joint (3) is used between the base plate (1), the support ring (2) and the single leg, which has strong anti-impact mechanical properties and avoids the occurrence of gaps that cause component collisions under vibration loads.

3. According to claim 1, an active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor is characterized in that: The lower end of the piston upper cover (9) is connected to the base of the piston rod (8) via threads, so that the rubbers on both sides remain symmetrical.

4. The active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor according to claim 1, characterized in that: The voice coil motor coil (10) and the voice coil motor permanent magnet (11) are in a non-zero displacement state in a natural state, but are in the middle of the travel of the voice coil motor coil (10), so that the coil can generate bilaterally symmetrical displacement.

5. The active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor according to claim 1, characterized in that: The rubber (7) and the voice coil motor coil (10) are connected via a piston rod (8), thereby realizing parallel connection of a passive vibration isolation part and an active vibration isolation part, thereby realizing active and passive integrated vibration isolation.

6. According to claim 1, an active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor: the impedance head (13) collects the force signal transmitted to the base part in real time, and then feeds it back to the algorithm to calculate the output force of the voice coil motor according to the dynamic equation.

7. The active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor according to claim 1, characterized in that: The rubber (7) of the vibration isolator comprises two parts, soft rubber and hard rubber, wherein the soft rubber is nested in the hard rubber, the soft rubber has an outer diameter of 20 mm, an inner diameter of 10 mm and a height of 13 mm, and the hard rubber has an outer diameter of 40 mm, an inner diameter of 20 mm and a height of 10 mm.

8. The active and passive integrated vibration isolation device based on soft and hard rubber and voice coil motor according to claim 1, characterized in that: Except for the voice coil motor, all other parts of the vibration isolator are made of lightweight aluminum alloy.

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