CN113606279B

CN113606279B - Vibration damper with alternating damping

Info

Publication number: CN113606279B
Application number: CN202111173608.0A
Authority: CN
Inventors: 班书昊; 李晓艳; 蒋学东
Original assignee: Liyang Chang Technology Transfer Center Co ltd
Current assignee: Liyang Chang Technology Transfer Center Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2021-12-07
Anticipated expiration: 2041-10-09
Also published as: CN113606279A

Abstract

The invention discloses a vibration damper with alternating damping, and belongs to the technical field of vibration dampers. The device comprises a shell, an upper end cover, a lower end cover, a T-shaped platform, a telescopic spring A and a telescopic spring B; a support rod is fixedly arranged on the lower end cover, a rotating shaft is rotatably arranged at the upper end of the support rod, a damping driving rod is fixedly arranged on the rotating shaft, and two ends of the damping driving rod are respectively rotatably provided with a roller A and a roller B; the inner walls of the left side and the right side of the shell are respectively fixedly provided with a fixed rack A and a fixed rack B which are bilaterally symmetrical relative to the rotating shaft, a double-faced gear is arranged between the fixed rack A and the fixed rack B, and a flexible elliptic damping gear is arranged in the double-faced gear; the lower end of the T-shaped platform is rotatably provided with an inclined driving connecting rod. The invention is a vibration damping device with alternating damping, which has simple and reasonable structure and generates damping by means of alternating stress, and the damping magnitude is positively correlated with the displacement magnitude and the movement speed.

Description

Vibration damper with alternating damping

Technical Field

The invention mainly relates to the technical field of vibration dampers, in particular to a vibration damper with alternating damping.

Background

One type of vibration damping device is widely used in engineering because of its effect of protecting equipment from absorbing vibration and impact energy, and the existing vibration damping devices are generally classified into two types: one is a solid vibration damping device using spring force as vibration damping force, and the other is a fluid vibration damping device using fluid motion damping as vibration damping force. Although the solid vibration damping device in the prior art realizes vibration isolation and vibration absorption, the following defects still exist: firstly, the damping force in the solid vibration damping device is far smaller than the spring force, so the main acting force for vibration damping is the spring force rather than the damping force, namely the vibration damping efficiency is low; secondly, the damping force in the solid vibration damper is provided by the dynamic friction force of relative movement, namely the damping force is irrelevant to the movement speed of the vibration-isolated object; more importantly, two objects moving relative to each other will experience some wear, which will significantly reduce the damping force. Therefore, the design of the solid vibration damper which provides damping by the internal friction force has important application value.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the technical problems in the prior art, the invention provides the vibration damper with the alternating damping, which has the advantages of simple and reasonable structure, capability of generating the damping by depending on the alternating stress, positive correlation between the damping and the displacement and the movement speed and better vibration damping effect.

In order to solve the problems, the solution proposed by the invention is as follows: the utility model provides a vibration damper with alternation damping, includes the shell, fixedly installs respectively in the upper end cover and the lower extreme cover of shell upper and lower both ends, the slip is installed T type platform on the upper end cover.

The lower end cover is fixedly provided with a support rod, the upper end of the support rod is rotatably provided with a rotating shaft, the rotating shaft is fixedly provided with a damping driving rod, and two ends of the damping driving rod are respectively rotatably provided with a roller A and a roller B.

The inner walls of the left side and the right side of the shell are respectively and fixedly provided with a fixed rack A and a fixed rack B which are bilaterally symmetrical relative to the rotating shaft, a double-faced gear is arranged between the fixed rack A and the fixed rack B, and a flexible elliptic damping gear is arranged in the double-faced gear.

The flexible elliptic damping gear is a thin-wall elliptic gear which can be elastically deformed and is made of damping materials, the outer wall of the flexible elliptic damping gear is provided with meshing teeth, and the inner wall of the flexible elliptic damping gear is smooth; the double-sided gear is a circular gear made of rigid materials, and the outer wall and the inner wall of the double-sided gear are both provided with meshing teeth; the double-sided gear is externally meshed with the fixed rack A and the fixed rack B and internally meshed with the outer wall of the flexible elliptic damping gear in the major axis direction; the roller A and the roller B are in rolling contact with the inner wall of the flexible elliptic damping gear in the long axis direction.

The lower end of the T-shaped platform is rotatably provided with an inclined driving connecting rod, and the lower end of the driving connecting rod is rotatably arranged at the right end point of the damping driving rod.

The device also comprises a telescopic spring A and a telescopic spring B; the two ends of the telescopic spring A are respectively connected with the left end point of the damping driving rod and the lower end cover, and the two ends of the telescopic spring B are respectively connected with the right end point of the damping driving rod and the lower end cover.

When the T-shaped platform is in a balanced state, the damping driving rod is parallel to the horizontal plane, and the extension spring A and the extension spring B are in a regular splayed structure and are symmetrical relative to the support rod.

Further, the vertical rod of the T-shaped platform passes through a linear bearing arranged on the upper end cover.

Further, the rotating shaft is located at the center of the double-faced gear, and the center of the double-faced gear is overlapped with the center of the flexible elliptical damping gear.

Compared with the prior art, the invention has the following advantages and beneficial effects: the vibration damping device with alternating damping is provided with the flexible elliptic damping gear, so that when the damping driving rod rotates, the flexible elliptic damping gear continuously generates elastic deformation so as to change the direction of the long axis of the flexible elliptic damping gear, and the changed internal alternating stress and internal friction force form damping for absorbing external vibration energy; the displacement of the lifting motion of the T-shaped platform is increased, the rotating angle of the long shaft of the flexible elliptical damping gear is increased, and the total damping force is increased; the larger the lifting motion speed of the T-shaped platform is, the larger the change frequency of alternating stress and internal friction force in the flexible elliptical damping gear is, and the larger the damping force is. Therefore, the vibration damping device with the alternating damping is simple and reasonable in structure, damping is generated by means of the alternating stress, the damping is positively correlated with the displacement and the movement speed, and the vibration damping effect is better.

Drawings

Fig. 1 is a schematic view of the structural principle of a vibration damping device with alternating damping of the present invention.

In the figure, 11-T type platform; 12-upper end cap; 13-a housing; 14-lower end cap; 21-fixed rack a; 22-fixed rack B; 23-a support bar; 24-a rotating shaft; 25-a damping drive rod; 26-double sided gear; 27-flexible elliptical damping gear; 28-roller a; 29-roller B; 30-a drive link; 31-extension spring a; 32-expansion spring B.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1, the vibration damper with alternating damping of the present invention comprises a housing 13, an upper end cap 12 and a lower end cap 14 fixedly installed on the upper and lower ends of the housing 13, respectively, and a T-shaped platform 11 slidably installed on the upper end cap 12.

The lower end cover 14 is fixedly provided with a support rod 23, the upper end of the support rod 23 is rotatably provided with a rotating shaft 24, the rotating shaft 24 is fixedly provided with a damping driving rod 25, and two ends of the damping driving rod 25 are respectively rotatably provided with a roller A28 and a roller B29. The shaft 24 is located directly below the T-shaped platform 11.

The inner walls of the left and right sides of the housing 13 are respectively and fixedly provided with a fixed rack A21 and a fixed rack B22 which are bilaterally symmetrical relative to the rotating shaft 24, a double-faced gear 26 is arranged between the fixed rack A21 and the fixed rack B22, and a flexible elliptic damping gear 27 is arranged in the double-faced gear 26.

The flexible elliptic damping gear 27 is a thin-wall elliptic gear which is made of damping material and can generate elastic deformation, the outer wall of the flexible elliptic damping gear is provided with meshing teeth, and the inner wall of the flexible elliptic damping gear is smooth; the double-sided gear 26 is a circular gear made of rigid material, and the outer wall and the inner wall of the double-sided gear are both provided with meshing teeth; the double-faced gear 26 is externally meshed with the fixed rack A21 and the fixed rack B22, and the double-faced gear 26 cannot rotate; the double-sided gear 26 is meshed with the outer wall of the flexible elliptic damping gear 27 in the major axis direction, and the flexible elliptic damping gear 27 cannot rotate around the rotating shaft 24; the roller a28 and the roller B29 are in rolling contact with the inner wall of the flexible elliptic damping gear 27 in the major axis direction, when the damping driving rod 25 drives the roller a28 and the roller B29 to rotate, the flexible elliptic damping gear 27 can only elastically deform, so that the radial direction of the damping driving rod 25 is the major axis direction, and the direction perpendicular to the major axis direction is the minor axis direction, that is, the flexible elliptic damping gear 27 continuously changes the major axis direction and the minor axis direction, so that the positions of two meshing points of the flexible elliptic damping gear 27 and the double-sided gear 26 move in the circumferential direction. Because certain meshing gaps exist between the fixed rack A21 and the fixed rack B22 and the double-faced gear 26, a certain buffering space is provided for elastic deformation of the flexible elliptic damping gear 27, the flexible elliptic damping gear 27 is favorable for generating larger damping force, and the damping effect is further improved.

The lower end of the T-shaped platform 11 is rotatably provided with an inclined driving link 30, and the lower end of the driving link 30 is rotatably provided at the right end of the damping driving rod 25.

The device also comprises a telescopic spring A31 and a telescopic spring B32; the two ends of the extension spring A31 are respectively connected with the left end point of the damping driving rod 25 and the lower end cover 14, and the two ends of the extension spring B32 are respectively connected with the right end point of the damping driving rod 25 and the lower end cover 14.

When the T-shaped platform 11 is in a balanced state, the damping driving rod 25 is parallel to the horizontal plane, and the extension spring a31 and the extension spring B32 are in a regular splayed structure and are symmetrical about the support rod 23, so that the T-shaped platform 11 mounted with the vibration-isolated object has the minimum elastic potential energy in the balanced state.

Preferably, the vertical rod of the T-shaped platform 11 passes through a linear bearing mounted on the upper end cover 12, reducing the friction force during its lifting movement.

Preferably, the rotating shaft 24 is located at the center of the double-sided gear 26, and the center of the double-sided gear 26 coincides with the center of the flexible elliptic damping gear 27, so that the straight line of the rotating damping driving rod 25 is always collinear with the major axis of the flexible elliptic damping gear 27.

The alternating damping principle of the invention is as follows: the object to be damped is first mounted on the T-shaped platform 11. When the T-shaped platform 11 moves upwards, the driving connecting rod 30 drives the damping driving rod 25 to rotate around the rotating shaft 24 in the anticlockwise direction, so that the roller A28 and the roller B29 are driven to rotate around the rotating shaft 24 in the anticlockwise direction, and the flexible elliptical damping gear 27 generates elastic deformation to enable the long axis of the flexible elliptical damping gear to rotate in the anticlockwise direction and to be always collinear with the damping driving rod 25; the T-shaped platform 11 moves downward, the driving link 30 drives the damping driving rod 25 to rotate clockwise, and the flexible elliptical damping gear 27 elastically deforms and rotates clockwise with its long axis always collinear with the damping driving rod 25. Since the flexible elliptic damping gear 27 itself does not rotate around the rotary shaft 24, its major axis rotates due to elastic deformation, and therefore, it generates alternating stress and internal friction force in its interior, which constitutes the damping of the vibration damping device of the present invention. The splayed telescopic springs A31 and B32 can enable the T-shaped platform 11 to return to the initial position in a static state, and can convert the stored elastic potential energy into power for driving the damping driving rod 25 to rotate reversely, so that the absorption effect of external energy is accelerated. Because the lifting movement of the T-shaped platform 11 firstly causes the damping driving rod 25 to rotate, and then the extension spring A31 and the extension spring B32 generate certain deformation, the damping device of the invention takes damping force as the main part and spring force as the auxiliary part in the vibration isolation process.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through creative efforts should fall within the scope of the present invention.

Claims

1. The utility model provides a vibration damper with alternation damping, includes shell (13), respectively fixed install upper end cover (12) and lower end cover (14) at both ends about shell (13), slide and install T type platform (11) on upper end cover (12), its characterized in that:

a support rod (23) is fixedly arranged on the lower end cover (14), a rotating shaft (24) is rotatably arranged at the upper end of the support rod (23), a damping driving rod (25) is fixedly arranged on the rotating shaft (24), and two ends of the damping driving rod (25) are respectively rotatably provided with a roller A (28) and a roller B (29);

the inner walls of the left side and the right side of the shell (13) are respectively and fixedly provided with a fixed rack A (21) and a fixed rack B (22) which are bilaterally symmetrical relative to the rotating shaft (24), a double-faced gear (26) is arranged between the fixed rack A (21) and the fixed rack B (22), and a flexible elliptic damping gear (27) is arranged in the double-faced gear (26);

the flexible elliptic damping gear (27) is a thin-wall elliptic gear which is made of damping materials and can generate elastic deformation, the outer wall of the flexible elliptic damping gear is provided with meshing teeth, and the inner wall of the flexible elliptic damping gear is smooth; the double-sided gear (26) is a circular gear made of rigid materials, and the outer wall and the inner wall of the double-sided gear are both provided with meshing teeth; the double-sided gear (26) is externally meshed with the fixed rack A (21) and the fixed rack B (22) and is internally meshed with the outer wall of the flexible elliptic damping gear (27) in the long axis direction; the roller A (28) and the roller B (29) are in rolling contact with the inner wall of the flexible elliptic damping gear (27) in the long axis direction;

the lower end of the T-shaped platform (11) is rotatably provided with an inclined driving connecting rod (30), and the lower end of the driving connecting rod (30) is rotatably arranged on the right end point of the damping driving rod (25);

the device also comprises a telescopic spring A (31) and a telescopic spring B (32); two ends of the telescopic spring A (31) are respectively connected with the left end point of the damping driving rod (25) and the lower end cover (14), and two ends of the telescopic spring B (32) are respectively connected with the right end point of the damping driving rod (25) and the lower end cover (14);

when T type platform (11) is in balanced state, damping actuating lever (25) are on a parallel with the horizontal plane, expanding spring A (31) with expanding spring B (32) are the structure of regular splayed and about cradling piece (23) symmetry.

2. A vibration damping device with alternating damping according to claim 1, wherein: and a vertical rod of the T-shaped platform (11) penetrates through a linear bearing arranged on the upper end cover (12).

3. A vibration damping device with alternating damping according to claim 1, wherein: the rotating shaft (24) is positioned at the center of the double-sided gear (26), and the center of the double-sided gear (26) is coincided with the center of the flexible elliptic damping gear (27).