CN217029775U

CN217029775U - Variable-damping rotary damper

Info

Publication number: CN217029775U
Application number: CN202122529377.4U
Authority: CN
Inventors: 温青; 龙航; 孙洪鑫; 华旭刚; 王修勇
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-07-22
Anticipated expiration: 2031-10-20

Abstract

The utility model discloses a variable-damping rotary damper, which comprises a displacement transmission assembly, a ball screw assembly, a displacement amplifier, a rotary damping assembly and a damping box, wherein the displacement transmission assembly is connected with the ball screw assembly; the upper end of the displacement transmission assembly is connected with the vibration control point, the lower end of the displacement transmission assembly is connected with the upper end of the ball screw assembly, and the displacement transmission assembly transmits the displacement of the vibration control point to the ball screw assembly; the lower end of the ball screw assembly is connected with the upper end of the displacement amplifier, and the ball screw assembly converts vertical displacement into circular motion and transmits the circular motion to the displacement amplifier; the lower end of the displacement amplifier is connected with a rotary damping component in the damping box, the displacement amplifier amplifies angular displacement and transmits the angular displacement to the rotary damping component, the rotary damping component is used for providing damping, and damping liquid is filled in the damping box. The utility model can automatically adjust the damping according to the change of external excitation under the condition of not inputting energy, achieves the aim of passively controlling the variable damping of the damper, and has positive value in the aspect of structural vibration control.

Description

Variable-damping rotary damper

Technical Field

The utility model relates to a variable damping rotary damper.

Background

The damper has a function of controlling the structural vibration, and can be divided into a passive control damper, a semi-active control damper and an active control damper, wherein the passive control damper has the advantages of simple structure, easiness in maintenance, good economical efficiency, durability and the like, and has wide market and economic values. However, because the structural spring and the damping parameters of the passive control damper are fixed, the passive control damper is difficult to carry out structural optimization design according to external excitation, and the application range of the passive control damper is limited.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a variable damping rotary damper which is simple in structure, low in cost and reliable in operation.

The technical scheme for solving the technical problems is as follows: a variable damping rotary damper comprises a displacement transmission assembly, a ball screw assembly, a displacement amplifier, a rotary damping assembly and a damping box; the upper end of the displacement transmission assembly is connected with the vibration control point, the lower end of the displacement transmission assembly is connected with the upper end of the ball screw assembly, and the displacement transmission assembly transmits the displacement of the vibration control point to the ball screw assembly; the lower end of the ball screw assembly is connected with the upper end of the displacement amplifier, and the ball screw assembly converts vertical displacement into circular motion and transmits the circular motion to the displacement amplifier; the lower end of the displacement amplifier is connected with a rotary damping component in the damping box, the displacement amplifier amplifies angular displacement and transmits the angular displacement to the rotary damping component, the rotary damping component is used for providing damping, and damping liquid is filled in the damping box.

Above-mentioned variable damping rotary damper, displacement transmission subassembly adopts ball-type ball pivot structure, including montant, ball pivot shell, ball, steel ball, the montant upper end connection vibration control point, the montant lower extreme pass ball pivot shell top opening and the interior ball fixed connection of ball pivot shell, ball circumference is equipped with the steel ball spout of a plurality of vertical settings, is equipped with the steel ball in the steel ball spout.

According to the variable-damping rotary damper, the ball screw assembly comprises a screw, a screw sliding groove, balls, a connecting channel, a sleeve and an angular displacement limiting clamp, the bottom end of the ball hinge shell is fixedly connected with the upper end of the sleeve through a connecting rod, the angular displacement limiting clamp for limiting the angular displacement of the sleeve is arranged on the outer side of the sleeve, the screw is sleeved in the sleeve, the screw is provided with a spiral screw sliding groove, the inner wall of the sleeve is provided with a spiral sleeve sliding groove matched with the screw sliding groove, the sleeve is internally provided with the connecting channel for communicating the top and the bottom of the sleeve sliding groove, and the balls are arranged in the sleeve sliding groove and the connecting channel; the vertical rod moves downwards to drive the balls in the sleeve sliding groove and the connecting channel to do circular reciprocating motion in the screw rod sliding groove, the balls act on the circumference of the screw rod sliding groove to enable the screw rod to do circular motion, and the angular displacement limiting clamp limits the angular displacement of the sleeve and the vertical rod, so that the vertical displacement of the sleeve is completely converted into the circular motion of the screw rod.

According to the variable-damping rotary damper, the lower part of the screw rod is provided with the limiting block for limiting the downward movement of the sleeve.

According to the variable-damping rotary damper, the displacement amplifier comprises the input shaft, the speed change gear set and the output shaft, the lower end of the screw rod is connected with the upper end of the input shaft, the lower end of the input shaft is connected with the upper end of the speed change gear set, the angular displacement is enlarged through the diameter ratio of the speed change gear set, and the lower end of the speed change gear set is connected with the output shaft.

Above-mentioned variable damping rotary damper, the rotary damping subassembly includes rotary main shaft, main rotor, vice rotor, rotating steel ball and base, displacement amplifier's output shaft and the rotary main shaft upper end fixed connection in the damping box are equipped with the base in the middle of the damping box bottom, are equipped with the rotating steel ball on the base, and the rotary main shaft lower extreme contacts with the rotating steel ball, rotary main shaft circumference is equipped with a plurality of main rotors, is equipped with the recess in the middle of the main rotor, and vice rotor is arranged in the recess and with main rotor sliding connection, is equipped with canceling release mechanical system between main rotor and the vice rotor.

Above-mentioned variable damping rotary damper, canceling release mechanical system includes blade slide rail and spring mechanism, the blade slide rail includes slide rail overcoat and slide rail, slide rail overcoat and main revolving fragment fixed connection, slide rail and vice revolving fragment fixed connection are equipped with limited slide in the slide rail overcoat, and the slide rail laminating concreties on vice revolving fragment, and the slide rail passes through slide rail steel ball slidable and sets up in the slide rail overcoat, and the slide rail tip is equipped with the limit slip card that limits slide rail roll-off slide rail overcoat, spring mechanism includes spring sleeve and spring, the spring sleeve is cup jointed by a plurality of sections barrel and is formed, and the spring sleeve both ends are fixed respectively on main revolving fragment and vice revolving fragment, inside the spring sleeve was located to the spring sleeve, spring both ends and spring sleeve both ends fixed connection.

In the variable damping rotary damper, the grooves are internally provided with the roller skates so as to reduce the friction of the upper and lower contact surfaces of the main rotating piece and the auxiliary rotating piece.

In the variable damping rotary damper, the auxiliary rotating piece is provided with the balancing weight.

Above-mentioned variable damping rotary damper, be equipped with sealed pulley between displacement amplifier and the damping case, sealed pulley includes pulley inside lining, pulley ball, pulley outer lantern ring, ball stationary blade and joint strip, and the pulley inside lining is fixed on displacement amplifier's output shaft and is subsidized the damping case, and pulley outer lantern ring is located the pulley inside lining outside, is equipped with a plurality of pulley balls between pulley inside lining and the pulley outer lantern ring, is equipped with the ball stationary blade between two adjacent pulley balls, is equipped with joint strip between pulley inside lining bottom and the damping case.

The utility model has the beneficial effects that: the utility model provides a variable damping rotary damper, which can automatically adjust the damping magnitude according to the change of external excitation under the condition of not inputting energy, achieves the aim of passively controlling the variable damping of the damper and has positive value in the aspect of structural vibration control.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the displacement transmission assembly in fig. 1.

Fig. 3 is a schematic structural view of the ball screw assembly of fig. 1.

Fig. 4 is a cross-sectional view of the sleeve of fig. 3.

Fig. 5 is a schematic diagram of the structure of the shift amplifier in fig. 1.

Fig. 6 is a schematic structural view of the sealing pulley in fig. 1.

Fig. 7 is a schematic structural view of the rotational damping assembly of fig. 1.

Fig. 8 is a schematic structural view of the main rotating plate in fig. 7.

Fig. 9 is a schematic structural view of the blade slide rail in fig. 7.

Fig. 10 is a structural schematic diagram of the outer cover of the slide rail in fig. 9 after being cut open.

Fig. 11 is a schematic view of the spring mechanism of fig. 7 with the spring sleeve open.

Fig. 12 is a schematic view of the spring mechanism of fig. 7 with the spring sleeve retracted.

Fig. 13 is a schematic diagram of a spring structure of the spring mechanism of fig. 7.

Fig. 14 is a schematic view of the position of the weight member in fig. 7.

Fig. 15 is a schematic view showing the position of the anchor bolt in fig. 1.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1, a variable damping rotary damper comprises a displacement transmission assembly 1, a ball screw assembly 2, a displacement amplifier 3, a rotary damping assembly 5, a damping box 8, damping liquid 7 and a fixing bolt 6; the upper end of the displacement transmission assembly 1 is connected with the vibration control point, the lower end of the displacement transmission assembly 1 is connected with the upper end of the ball screw assembly 2, and the displacement transmission assembly 1 transmits the displacement of the vibration control point to the ball screw assembly 2; the lower end of the ball screw component 2 is connected with the upper end of the displacement amplifier 3, and the ball screw component 2 converts vertical displacement into circular motion and transmits the circular motion to the displacement amplifier 3; the lower end of the displacement amplifier 3 is connected with a rotary damping component 5 in a damping box 8, the displacement amplifier 3 amplifies angular displacement and transmits the angular displacement to the rotary damping component 5, the rotary damping component 5 is used for providing damping, and the damping box 8 is filled with damping liquid 7.

As shown in fig. 2, the displacement transmission assembly 1 adopts a spherical ball hinge structure and comprises a vertical rod 1-1, a ball hinge housing 1-2, a ball 1-3 and a steel ball 1-4, wherein the upper end of the vertical rod 1-1 is connected with a vibration control point, the lower end of the vertical rod 1-1 penetrates through an opening at the top end of the ball hinge housing 1-2 to be fixedly connected with the ball 1-3 in the ball hinge housing 1-2, and the opening at the top end of the ball hinge housing 1-2 has an effect of limiting the rotation amplitude of the vertical rod 1-1 by taking the center of a ball hinge as an origin; the ball 1-3 is circumferentially provided with a plurality of vertically arranged steel ball chutes 1-5, 8 steel balls 1-4 are arranged in the steel ball chutes 1-5, the opening of each steel ball chute 1-5 is smaller than the diameter of each steel ball 1-4, the steel ball chutes 1-5 are used for allowing the steel balls 1-4 to have certain vertical displacement during rotation so as to reduce friction, and the steel balls 1-4 are used for reducing the friction between the ball 1-3 and the ball hinge housing 1-2 so that the vertical rods 1-1 can realize low-friction rotation. The displacement transmission assembly 1 has the functions of realizing the transmission of vertical positions and allowing a structural vibration control point to have limited non-vertical displacement, and accords with the design and engineering practice of a damper.

As shown in fig. 3 and 4, the ball screw assembly 2 comprises a screw 2-1, a screw sliding groove 2-2, a ball 2-3, a connecting channel 2-4, a sleeve 2-5 and an angular displacement limiting clamp 2-6, the bottom end of the ball hinge housing 1-2 is fixedly connected with the upper end of the sleeve 2-5 through a connecting rod, the screw 2-1 is sleeved in the sleeve 2-5, the screw 2-1 is provided with a spiral screw sliding groove 2-2, the inner wall of the sleeve 2-5 is provided with a spiral sleeve sliding groove matched with the screw sliding groove 2-2, the outer side of the sleeve 2-5 is provided with the angular displacement limiting clamp 2-6 for limiting the angular displacement of the vertical rod 1-1 and the sleeve 2-5, the sleeve 2-5 is internally provided with the connecting channel 2-4 for communicating the top and the bottom of the sleeve sliding groove, balls 2-3 are arranged in the sleeve sliding groove and the connecting channel 2-4; the lower part of the screw rod 2-1 is provided with a limiting block 2-7 for limiting the maximum distance of the downward movement of the sleeve 2-5; the vertical rod 1-1 moves downwards to drive the ball bearings 2-3 in the sleeve sliding groove and the connecting channel 2-4 to do circular reciprocating motion in the screw rod sliding groove 2-2, and the horizontal force of the ball bearings 2-3 acting on the circumference of the screw rod sliding groove 2-2 enables the screw rod 2-1 to do circular motion, so that the vertical displacement of the sleeve 2-5 is completely converted into the circular motion of the screw rod 2-1.

As shown in fig. 5, the displacement amplifier 3 comprises an input shaft 3-1, a speed change gear set 3-2 and an output shaft 3-3, the lower end of a screw rod 2-1 is connected with the upper end of the input shaft 3-1, the lower end of the input shaft 3-1 is connected with the upper end of the speed change gear set 3-2, the speed change gear set 3-2 comprises 4 speed change gears, the 4 speed change gears surround the input shaft 3-1 to enlarge the angular displacement, the displacement output shaft 3-3 is meshed with a gear at the bottom end of the speed change gear set 3-2, and the angular displacement is further enlarged through the gear set diameter ratio. The angular displacement expansion ratio can be adjusted by adjusting the diameters of different gear sets so as to be suitable for different working environments.

As shown in fig. 6, a sealing pulley 4 is disposed between the displacement amplifier 3 and the damping box 8, the sealing pulley 4 includes a pulley inner liner 4-1, pulley balls 4-2, a pulley outer collar 4-3, ball fixing pieces 4-4 and sealing rubber strips 4-5, the pulley inner liner 4-1 is fixed on the output shaft 3-3 of the displacement amplifier 3 and attached to the damping box 8, the pulley outer collar 4-3 is located on the outer side of the pulley inner liner 4-1, a plurality of pulley balls 4-2 are disposed between the pulley inner liner 4-1 and the pulley outer collar 4-3, the ball fixing pieces 4-4 are disposed between two adjacent pulley balls 4-2, and the sealing rubber strips 4-5 are disposed between the bottom of the pulley inner liner 4-1 and the damping box 8.

As shown in fig. 7 and 8, the rotary damping assembly 5 comprises a rotary main shaft 5-1, a main rotary plate 5-2, an auxiliary rotary plate 5-3, a rotary steel ball 5-4 and a base 5-5, an output shaft 3-3 of the displacement amplifier 3 is fixedly connected with the upper end of a rotating main shaft 5-1 in a damping box 8, a base 5-5 is arranged in the middle of the bottom of the damping box 8, a rotating steel ball 5-4 is arranged on the base 5-5, the lower end of the rotating main shaft 5-1 is contacted with the rotating steel ball 5-4, the rotating main shaft 5-1 is circumferentially provided with a plurality of main rotating pieces 5-2, a groove is formed in the middle of each main rotating piece 5-2, an auxiliary rotating piece 5-3 is positioned in the groove and is slidably connected with the main rotating piece 5-2, and a roller skate 5-7 is arranged in the groove to reduce the friction of the upper and lower contact surfaces of the main rotating piece 5-2 and the auxiliary rotating piece 5-3; a reset mechanism is arranged between the main rotating sheet 5-2 and the auxiliary rotating sheet 5-3, and a balancing weight 5-6 is arranged on the auxiliary rotating sheet 5-3. The auxiliary rotating sheet 5-3 is processed by an arc angle 5-8 to prevent the clamping during sliding.

As shown in fig. 9-13, the reset mechanism comprises a blade sliding rail 5-8 and a spring mechanism 5-9, the blade sliding rail 5-8 comprises a sliding rail outer sleeve 5-10 and a sliding rail 5-11, the sliding rail outer sleeve 5-10 is fixedly connected with a main rotating sheet 5-2, a limited slideway 5-12 is arranged in the sliding rail outer sleeve 5-10, the sliding rail 5-11 is attached and fixed on an auxiliary rotating sheet 5-3, the other end of the sliding rail 5-11 is slidably arranged in the limited slideway 5-12 through a sliding rail steel ball 5-13, a limited slip clamp 5-14 for limiting the sliding rail 5-11 to slide out of the limited slideway 5-12 is arranged at the end of the sliding rail 5-11, a limit clamp 5-15 for preventing the sliding rail 5-11 and the sliding rail outer sleeve 5-10 in a pan is arranged at the other end of the sliding rail 5-11, the spring mechanism 5-9 comprises a spring sleeve 5-16 and a spring 5-17, the spring sleeve 5-16 is formed by sleeving a plurality of sections of sleeves, two ends of the spring sleeve 5-16 are respectively fixed on the main rotating sheet 5-2 and the auxiliary rotating sheet 5-3, the spring 5-17 is sleeved inside the spring sleeve 5-16, and two ends of the spring 5-17 are fixedly connected with two ends of the spring sleeve 5-16.

The working process of the utility model is as follows: structural vibration is downwards transmitted to the ball screw assembly 2 through the displacement transmission assembly 1, the ball screw assembly 2 converts vertical displacement into angular displacement, the angular displacement is amplified by the displacement amplifier 3 and then is output to the rotating spindle 5-1, the rotating spindle 5-1 drives the main rotating piece 5-2 to rotate, at the moment, the auxiliary rotating piece 5-3 slides out of the main rotating piece 5-2 through the sliding rail 5-11 under the centrifugal force of a balance weight, meanwhile, the spring 5-17 stretches to counteract the centrifugal force, the sliding-out distance of the auxiliary rotating piece 5-3 is determined by the centrifugal force and the rigidity of the spring 5-17, the sliding-out distance of the auxiliary rotating blade can be adjusted by changing the rigidity of the spring 5-17, and therefore damping is adjusted. The slide limiting card 5-14 limits the maximum distance for the auxiliary rotating sheet 5-3 to slide out, and ensures that the auxiliary rotating sheet 5-3 does not slide out of the main rotating sheet 5-2. In addition, a diagonal line, such as a diamond diagonal line, may be engraved on the surfaces of the main rotating plate 5-2 and the sub rotating plate 5-3 to increase the damping force. In addition, damping structures can be added to the main rotating piece 5-2 and the auxiliary rotating piece 5-3, or the application range can be expanded by designing the structures such as an upper structure, a lower structure and the like.

Claims

1. A variable damping rotary damper is characterized by comprising a displacement transmission assembly, a ball screw assembly, a displacement amplifier, a rotary damping assembly and a damping box; the upper end of the displacement transmission assembly is connected with the vibration control point, the lower end of the displacement transmission assembly is connected with the upper end of the ball screw assembly, and the displacement transmission assembly transmits the displacement of the vibration control point to the ball screw assembly; the lower end of the ball screw assembly is connected with the upper end of the displacement amplifier, and the ball screw assembly converts vertical displacement into circular motion and transmits the circular motion to the displacement amplifier; the lower end of the displacement amplifier is connected with a rotary damping component in the damping box, the displacement amplifier amplifies angular displacement and transmits the angular displacement to the rotary damping component, the rotary damping component is used for providing damping, and damping liquid is filled in the damping box.

2. The variable damping rotary damper according to claim 1, wherein the displacement transmission assembly is of a spherical hinge structure and comprises a vertical rod, a spherical hinge housing, a round ball and a steel ball, the upper end of the vertical rod is connected with a vibration control point, the lower end of the vertical rod penetrates through an opening at the top end of the spherical hinge housing to be fixedly connected with the round ball in the spherical hinge housing, a plurality of vertically arranged steel ball chutes are circumferentially arranged on the round ball, and the steel ball chutes are internally provided with steel balls.

3. The variable damping rotary damper according to claim 2, wherein the ball screw assembly comprises a screw, a screw sliding groove, balls, a connecting channel, a sleeve and an angular displacement limiting clamp, the bottom end of the ball hinge housing is fixedly connected with the upper end of the sleeve through a connecting rod, the outer side of the sleeve is provided with the angular displacement limiting clamp for limiting the angular displacement of the sleeve, the screw is sleeved in the sleeve, the screw is provided with a spiral screw sliding groove, the inner wall of the sleeve is provided with a spiral sleeve sliding groove matched with the screw sliding groove, the sleeve is internally provided with the connecting channel for communicating the top and the bottom of the sleeve sliding groove, and the sleeve sliding groove and the connecting channel are internally provided with the balls; the vertical rod moves downwards to drive the balls in the sleeve sliding groove and the connecting channel to do circular reciprocating motion in the screw rod sliding groove, the balls act on the circumference of the screw rod sliding groove to enable the screw rod to do circular motion, and the angular displacement limiting clamp limits the angular displacement of the sleeve and the vertical rod, so that the vertical displacement of the sleeve is completely converted into the circular motion of the screw rod.

4. The variable damping rotary damper according to claim 3, wherein a limiting block for limiting the downward movement of the sleeve is provided at a lower portion of the screw rod.

5. The variable damping rotary damper according to claim 3, wherein the displacement amplifier comprises an input shaft, a speed change gear set and an output shaft, the lower end of the lead screw is connected with the upper end of the input shaft, the lower end of the input shaft is connected with the upper end of the speed change gear set, the angular displacement is enlarged by the diameter ratio of the speed change gear set, and the lower end of the speed change gear set is connected with the output shaft.

6. The variable damping rotary damper according to claim 5, wherein the rotary damping assembly comprises a rotary main shaft, a main rotary piece, an auxiliary rotary piece, a rotary steel ball and a base, the output shaft of the displacement amplifier is fixedly connected with the upper end of the rotary main shaft in the damping box, the base is arranged in the middle of the bottom of the damping box, the rotary steel ball is arranged on the base, the lower end of the rotary main shaft is in contact with the rotary steel ball, a plurality of main rotary pieces are circumferentially arranged on the rotary main shaft, a groove is arranged in the middle of each main rotary piece, the auxiliary rotary piece is located in the groove and is slidably connected with the main rotary piece, and a reset mechanism is arranged between each main rotary piece and the corresponding auxiliary rotary piece.

7. The variable damping rotary damper according to claim 6, wherein the reset mechanism comprises a blade slide rail and a spring mechanism, the blade slide rail comprises a slide rail outer sleeve and a slide rail, the slide rail outer sleeve is fixedly connected with the main rotary piece, a limited slide way is arranged in the slide rail outer sleeve, the slide rail is attached to and fixedly connected with the auxiliary rotary piece, the slide rail is slidable through slide rail steel balls and arranged in the slide rail outer sleeve, a sliding limiting clamp for limiting the slide rail to slide out of the slide rail outer sleeve is arranged at the end of the slide rail, the spring mechanism comprises a spring sleeve and a spring, the spring sleeve is formed by sleeving a plurality of sections of sleeves, two ends of the spring sleeve are respectively fixed on the main rotary piece and the auxiliary rotary piece, the spring sleeve is arranged inside the spring sleeve, and two ends of the spring are fixedly connected with two ends of the spring sleeve.

8. The variable damping rotary damper according to claim 7, wherein a roller is disposed in the groove to reduce friction between upper and lower contact surfaces of the main rotor and the sub-rotor.

9. The variable damping rotary damper of claim 7, wherein a weight is provided on the secondary rotor.

10. The variable damping rotation damper according to claim 7, wherein a sealing pulley is disposed between the displacement amplifier and the damping box, the sealing pulley includes a pulley inner lining, a pulley ball, a pulley outer collar, a ball retaining piece and a sealing rubber strip, the pulley inner lining is fixed on the output shaft of the displacement amplifier and attached to the damping box, the pulley outer collar is disposed outside the pulley inner lining, a plurality of pulley balls are disposed between the pulley inner lining and the pulley outer collar, the ball retaining piece is disposed between two adjacent pulley balls, and the sealing rubber strip is disposed between the bottom of the pulley inner lining and the damping box.