CN203756834U - Vibration isolator - Google Patents

Abstract

The utility model relates to the technical field of vibration isolators, in particular to a vibration isolator, comprising a vibration isolator main body with a bearing plate and a positioning block, and a main shaft with a built-in movable damping shaft is arranged between the bearing plate and the positioning block The bottom of the main shaft sleeve has a bowl-shaped structure with a through hole, and its undercut is fixed on the positioning block; one end of the movable damping shaft is threaded with the lock nut, and the other end extends out of the through hole of the main shaft sleeve and is connected to the bearing plate. Fixed connection, the part of the movable damping shaft close to the bearing plate is provided with a cylindrical platform integrally formed with the movable damping shaft. A disc spring is sheathed on the shaft, and damping limit blocks are respectively set on the two ends of the disc spring, which are sheathed on the movable damping shaft. The outer diameter of the damping limit block is larger than the inner diameter of the through hole of the main shaft sleeve. The utility model has a simple, compact and reasonable structure, and can effectively prevent the vibration amplitude of the steel wire rope vibration isolator from being too large.

Description

a vibration isolator

technical field

The utility model relates to the technical field of vibration reduction, in particular to a vibration isolator.

Background technique

With the rapid development of information technology, the degree of electronization and precision of equipment has been further strengthened, and it has begun to be widely used in national defense, civil nuclear and other fields, which puts forward new requirements for electronic equipment to adapt to special environments. When electronic equipment is in a vibration and strong impact environment, due to vibration fatigue and resonance phenomena, the performance of electronic equipment may be reduced or even fail. In order to improve the service life and work efficiency of the equipment, vibration isolators are now installed on electronic equipment to improve the anti-vibration ability of the equipment, ensure the reliability of its normal operation under large impact, reduce structural noise, and ensure product performance. and reliability of use. At present, most of the vibration isolators installed in electronic equipment are mainly rubber vibration isolators and wire rope vibration isolators. Rubber vibration isolators are cheap. Weak and other disadvantages, most of the products used are civilian products, and the use of special fields such as scientific research and military use is relatively narrow. As a kind of vibration isolator widely used in scientific research and military fields, the wire rope vibration isolator has obvious energy absorption and noise reduction effect and impact resistance, but for higher amplitude vibrations, the effect of the wire rope vibration isolator is very unsatisfactory. If the stiffness of the vibration isolator is increased, the vibration isolation effect cannot be achieved.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages and provide a vibration isolator, thereby preventing the vibration amplitude of the wire rope vibration isolator from being too large and improving the vibration isolation effect.

In order to achieve the above technical purpose, the utility model provides a solution: a vibration isolator, including a vibration isolator main body with a bearing plate and a positioning block, and a built-in movable damping shaft is arranged between the bearing plate and the positioning block The main shaft sleeve has a bowl-shaped structure with a through hole at the bottom of the main shaft sleeve, and its undercut is fixed on the positioning block; one end of the movable damping shaft is threaded with the lock nut, and the other end extends out of the through hole of the main shaft sleeve and is connected with the bearing The object plate is fixedly connected. The part of the movable damping shaft close to the object plate is provided with a cylindrical platform integrally formed with the movable damping shaft. The outer diameter of the cylindrical platform is smaller than the inner diameter of the through hole of the main shaft sleeve. The distance between the cylindrical platform and the lock nut A disc spring is sleeved on the movable damping shaft, and damping limit blocks sleeved on the movable damping shaft are respectively arranged at both ends of the disc spring, and the outer diameter of the damping limit block is larger than the inner diameter of the through hole of the main shaft sleeve.

Moreover, the bearing plate and the positioning block are both circular, and the circumference of the positioning block is radially connected to several connecting blocks, and two steel wire ropes are arranged symmetrically on both sides of each connecting block to radially connect with the circumference of the bearing plate. The two ends of the wire rope have an included angle greater than zero in the axial direction.

Moreover, a hole for accommodating the movable damping shaft and the locking nut is provided in the middle of the positioning block, and the diameter of the hole is smaller than the outer diameter of the damping limit block.

Moreover, the diameter of the through hole of the main shaft sleeve is 2 mm larger than the outer diameter of the cylindrical platform.

Moreover, the lock nut, the movable damping shaft, and the damping limit block are all made of stainless steel.

Moreover, the main shaft sleeve is made of aluminum alloy.

The utility model has a simple, compact and reasonable structure, especially can effectively prevent the vibration amplitude of the steel wire rope vibration isolator from being too large.

Description of drawings

Figure 1 is a schematic structural view of the main body of the vibration isolator.

Fig. 2 is the structural representation of the utility model.

Figure 3 is a bottom view of Figure 2.

Fig. 4 is a schematic structural view of the main shaft sleeve.

FIG. 5 is a bottom view of FIG. 4 .

Fig. 6 is a structural schematic diagram of the movable damping shaft.

Among them, 1. Vibration isolator main body, 2. Lock nut, 3. Movable damping shaft, 4. Damping limit block, 5. Disc spring, 6. Steel wire rope, 7. Main shaft sleeve, 8. Connection block, 9. Positioning Block, 10, bearing plate.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

This embodiment provides a vibration isolator, including a vibration isolator main body 1 with a bearing plate 10 and a positioning block 9, and a main shaft sleeve with a built-in movable damping shaft 3 is arranged between the bearing plate 10 and the positioning block 9, The bottom of the main shaft sleeve has a bowl-shaped structure with a through hole, and its undercut is fixed on the positioning block 9; one end of the movable damping shaft 3 is threaded with the lock nut 2, and the other end extends out of the through hole of the main shaft sleeve and is connected to the bearing. The plate 10 is fixedly connected, and the part of the movable damping shaft 3 close to the object bearing plate 10 is provided with a cylindrical platform integrally formed with the movable damping shaft 3. The outer diameter of the cylindrical platform is smaller than the inner diameter of the through hole of the main shaft sleeve. A disc spring is sheathed on the movable damping shaft 3 between the 2, and a damping limit block 4 is set on the movable damping shaft 3 at both ends of the disc spring respectively. the inside diameter of.

Further, the object-bearing plate 10 and the positioning block 9 are both circular, and the circumference of the positioning block 9 is radially connected to several connecting blocks 8, and two steel wire ropes are symmetrically arranged on the two sides of each connecting block 8 to connect with the object-bearing plate 10. The circumference is radially connected, and the two ends of each steel wire rope have an included angle greater than zero in the axial direction.

Further, a hole for accommodating the movable damping shaft 3 and the locking nut 2 is provided in the middle of the positioning block 9 , and the diameter of the hole is smaller than the outer diameter of the damping limiting block 4 .

Further, the diameter of the through hole of the main shaft sleeve 7 is 2 mm larger than the outer diameter of the cylindrical platform.

Further, the lock nut 2, the movable damping shaft 3, and the damping limit block 4 are all made of stainless steel

Further, the main shaft sleeve 7 is made of aluminum alloy.

When working, when the amplitude of the equipment is small, since the damping limit block 4 at the upper and lower ends does not contact the upper end of the main shaft sleeve 7 and the positioning block 9, the disc spring 5 in the main shaft sleeve 7 will not work without deformation. Only the main body of the vibration isolator 1 plays the role of shock isolation; when the amplitude of the equipment is large, that is, the main body of the vibration isolator 1 has a large amplitude change in the vertical direction: if the compression amplitude of the upper and lower ends of the main body of the vibration isolator 1 is too large, that is, the bearing If the distance between the plate 10 and the positioning block 9 is too small, then the lower end damping limit block 4 contacts with the positioning block 9, so that the disc spring 5 is gradually compressed, and the damping becomes larger, preventing the contact between the bearing plate 10 and the positioning block 9. The distance becomes smaller, thereby preventing the vibration amplitude of the vibration isolator body 1 from continuing to increase; if the upper and lower ends of the vibration isolator body 1 are stretched and the amplitude is too large, then the upper end of the damping limit block 4 and the upper end of the main shaft sleeve 7 are in contact, so that the disc spring 5 is gradually compressed, and the damping becomes larger, preventing the distance between the object bearing plate 10 and the positioning block 9 from becoming larger, thereby preventing the vibration amplitude of the vibration isolator main body 1 from further expanding. This can effectively prevent the vibration amplitude of the wire rope isolator from being too large.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements or deformations can also be made, these improvements or Deformation should also be regarded as the protection scope of the present utility model.

Claims (6)

1. A vibration isolator, comprising a vibration isolator main body with a bearing plate and a positioning block, characterized in that: a main shaft sleeve with a built-in movable damping shaft is provided between the object bearing plate and the positioning block, and the main shaft sleeve bottom has The bowl-shaped structure of the through hole, the undercut is fixed on the positioning block; one end of the movable damping shaft is threadedly connected with the lock nut, and the other end extends out of the through hole of the main shaft sleeve and is fixedly connected with the bearing plate. The movable damping shaft The part close to the bearing plate is equipped with a cylindrical platform integrally formed with the movable damping shaft. The outer diameter of the cylindrical platform is smaller than the inner diameter of the through hole of the main shaft sleeve, and a disc spring is sleeved on the movable damping shaft between the cylindrical platform and the lock nut. , the two ends of the disc spring are respectively provided with damping limit blocks sleeved on the movable damping shaft, and the outer diameter of the damping limit block is larger than the inner diameter of the through hole of the main shaft sleeve. 2. A vibration isolator according to claim 1, characterized in that: the object bearing plate and the positioning block are circular, the circumference of the positioning block is radially connected to several connecting blocks, and the two sides of each connecting block Two steel wire ropes are symmetrically arranged to be radially connected with the circumference of the object bearing plate, and the two ends of each steel wire rope have an included angle greater than zero in the axial direction. 3. A vibration isolator according to claim 1, characterized in that: the middle part of the positioning block is provided with a hole for accommodating the movable damping shaft and the locking nut, and the diameter of the hole is smaller than the outer diameter of the damping limit block . 4. A vibration isolator according to claim 1, characterized in that: the diameter of the through hole of the main shaft sleeve is 2 mm larger than the outer diameter of the cylindrical platform. 5. A vibration isolator according to claim 1 or 2 or 3 or 4, characterized in that: the locking nut, the movable damping shaft, and the damping limit block are all made of stainless steel. 6. A vibration isolator according to claim 1 or 2 or 3 or 4, characterized in that: the main shaft sleeve is made of aluminum alloy.