Totally-closed rigidity adjustable type vibration isolator

An adjustable vibration isolator technology, applied in the field of buffer devices and airborne equipment vibration isolation, can solve the problems of high cost, long time period, inability to meet the use requirements, etc., to expand the scope of use, improve energy consumption, improve Vibration isolation effect

Active Publication Date: 2012-06-27
CHINA AIRPLANT STRENGTH RES INST
6 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Rubber vibration isolators have good damping characteristics and three-way vibration isolation effects. When airborne equipment is not allowed to be used in oily, dusty and other environments, rubber vibration isolators with open structures will not be able to meet the use of such environments Require
[0003] In addition, for ordinary rubber vibration isolators, when the selected rubber formula and structural design form are d...
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Method used

In addition, in order to eliminate the shrinkage stress of rubber, improve the durability of vibration isolator, after vibration isolator is installed, each rubber original should bear certain preload, so the radial radius of damping rubber ball 5, the upper rubber ring 4 and the outer diameter of the lower rubber ring 7 are slightly larger than the inner diameter of the housing 6, and they fit tightly with the inner wall of the housing 6 after installation. In the axial direction, the upper rubber ring 4 and the lower rubber ring 7 are in close contact with the inner wall of the upper cover 3 and the bottom plate 9 respectively. Vibration isolators dissipate energy during impact and vibration through the large damping provided by damping rubber components, and suppress resonance peaks. In addition, the pre-tightening force on the rubber components can be adjusted by rotating the upper cover 3 to achieve the purpose of adjusting the overall stiffness of the shock absorber. Under the same shell size and working height, by changing the material and structure of the upper rubber ring 4 and the lower rubber ring 7, a series of products with the same overall size but different stiffness and damping characteristics and different load capacity can be obtained.
Please refer to Fig. 1 and Fig. 2 at the same time, wherein Fig. 1 is a schematic structural view of a fully enclosed stiffness-adjustable vibration isolator of the present invention, and Fig. 2 is a top view of Fig. 1 . The fully enclosed vibration isolator with adjustable stiffness includes a mounting mandrel 1, a protective rubber cover 2, an upper cover 3, an upper rubber ring 4, a damping rubber ball 5, a shell 6, a lower rubber ring 7, a hollow rivet 8, and a bottom plate 9. Th...
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Abstract

The invention relates to a vibration isolation and buffer device for machine-born equipment, in particular to a totally-closed rigidity adjustable type vibration isolator, which comprises a casing, an installation core shaft, a protective rubber cover, an upper rubber ring, a spherical vibration isolation part and a lower rubber ring. The casing is of a sealed structure, the top of the casing is provided with an installation hole where the installation core shaft is arranged, and the spherical vibration isolation part is arranged in the sealed casing and is connected with the bottom of the installation core shaft together. The upper rubber ring is sleeved at the upper portion of a damp rubber ball, and the lower rubber ring is sleeved at the lower portion of the damp rubber ball which is sealed in the casing. The totally-closed rigidity adjustable type vibration isolator adopts a totally-closed structure to have small environment influence, utilizes a combination structure combining the spherical surface and the cylindrical surface to improve vibration isolation and retarding effects, utilizes the structures of the upper rubber ring and the lower rubber ring to limit the swinging of the head of the installation core shaft and improve using safety, and can be suitable for different frequency ranges by rotating the upper cover to adjust the rigidity of the vibration isolator.

Application Domain

Technology Topic

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  • Totally-closed rigidity adjustable type vibration isolator
  • Totally-closed rigidity adjustable type vibration isolator
  • Totally-closed rigidity adjustable type vibration isolator

Examples

  • Experimental program(1)

Example Embodiment

[0021] The present invention will be further described in detail below through specific embodiments:
[0022] See also figure 1 with figure 2 ,among them, figure 1 It is a schematic diagram of the structure of the fully enclosed stiffness adjustable vibration isolator of the present invention, figure 2 Yes figure 1 Top view. The fully enclosed stiffness adjustable vibration isolator includes a mounting mandrel 1, a protective rubber cover 2, an upper cover 3, an upper rubber ring 4, a damping rubber ball 5, a shell 6, a lower rubber ring 7, a hollow rivet 8, and a bottom plate 9. The upper cover 3 is arranged on the shell 6 and is threadedly connected with the shell, and the top has a mounting hole for placing the mounting mandrel 1. The bottom edge of the shell 6 is connected with the bottom plate 9 by hollow rivets 8 to form an integral sealed shell. The bottom of the mounting mandrel 1 is deep inside the housing and has a transverse boss structure. The spherical vibration isolator as the main vibration isolator of the vibration isolator is the damping rubber ball 5, which is arranged in the shell and is vulcanized and bonded to the transverse boss structure at the bottom of the mounting mandrel 1, such as image 3 Shown. The upper rubber ring 4 and the lower rubber ring 7 are respectively sleeved on the upper part and the lower part of the damping rubber ball 5 to further improve the buffering and vibration isolation effects. In addition, a protective rubber cover 2 made of oil-resistant rubber is sleeved on the mounting mandrel 1 and located above the upper cover 3 to prevent harmful substances such as oil and dust from corroding the internal damping rubber structure and play a protective role.
[0023] See Figure 4 , Which is a schematic diagram of the three-dimensional structure of the upper and lower rubber rings. The upper rubber ring 4 and the lower rubber ring 7 are annular structures composed of rubber or damping rubber. The material and structural dimensions of the rubber ring can be designed according to specific requirements to realize the designability of the stiffness of the rubber isolator. At the same time, the rubber ring plays a role of lateral fixing, which can improve the lateral bearing capacity of the vibration isolator.
[0024] The axial stiffness of the fully enclosed stiffness adjustable vibration isolator of the present invention is provided by the damping rubber ball 5, the upper rubber ring 4 and the lower rubber ring 7 together. When the mounting mandrel 1 of the vibration isolator moves up and down, the damping rubber ball 5 compresses the upper and lower rubber rings, and the rubber ring and the rubber ball produce damping deformation, which consumes energy. In the same way, the lateral stiffness of the vibration isolator is provided by the damping rubber ball 5, the upper rubber ring 4 and the lower rubber ring 7. The spherical surface of the rubber ball and the cylindrical surface of the rubber ring enable the vibration isolator to have a proper proportion of free surfaces during the working process, resulting in deformation and consuming vibration energy.
[0025] In addition, in order to eliminate the contraction stress of the rubber and improve the durability of the vibration isolator, each rubber element after the vibration isolator is installed should bear a certain preload. Therefore, the radial radius of the damping rubber ball 5, the upper rubber ring 4 and the lower The outer diameter of the rubber ring 7 is slightly larger than the inner diameter of the housing 6, and it is tightly attached to the inner wall of the housing 6 after installation. In the axial direction, the upper rubber ring 4 and the lower rubber ring 7 are in close contact with the inner wall of the upper cover 3 and the bottom plate 9 respectively. The vibration isolator uses the large damping provided by the damping rubber element to dissipate the energy in the impact and vibration process and suppress the resonance peak. The pre-tightening force of the rubber component can be adjusted by rotating the upper cover 3 to achieve the purpose of adjusting the overall stiffness of the shock absorber. Under the same housing size and working height, by changing the material and structure of the upper rubber ring 4 and the lower rubber ring 7, a series of products with the same external dimensions but with different stiffness and damping characteristics and different bearing capacities can be obtained.
[0026] The manufacturing process of the fully enclosed stiffness adjustable vibration isolator of the present invention is as follows: the damping rubber ball 5 and the mounting mandrel 1 are vulcanized and bonded together to form a damping rubber vibration isolation component. The shell 6 and the bottom plate 9 are riveted together with 4 hollow rivets 8, and the lower rubber ring 7, the damping rubber ball 5, and the upper rubber ring 4 pusher assembly are inserted into the shell 6, and the upper cover 3 is rotated and tightened to install the mandrel The column of 1 passes through the circular hole in the middle of the upper cover 3, and then the protective rubber cover 2 is sleeved on the mounting mandrel 1 to complete the assembly of the vibration isolator of the present invention. In addition, the internal thread of the installation mandrel 1 of the vibration isolator is connected to the equipment, and four screws are respectively passed through the inner holes of the hollow rivets to be connected to the installation foundation.
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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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