Totally-closed rigidity adjustable type vibration isolator

[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.