TW202028632A - Eddy-current type damper - Google Patents

Eddy-current type damper Download PDF

Info

Publication number
TW202028632A
TW202028632A TW108144208A TW108144208A TW202028632A TW 202028632 A TW202028632 A TW 202028632A TW 108144208 A TW108144208 A TW 108144208A TW 108144208 A TW108144208 A TW 108144208A TW 202028632 A TW202028632 A TW 202028632A
Authority
TW
Taiwan
Prior art keywords
conductive
magnet holding
gear
eddy current
permanent magnets
Prior art date
Application number
TW108144208A
Other languages
Chinese (zh)
Inventor
野口泰
野上裕
今西憲治
増井亮介
佐野薫平
Original Assignee
日商日本製鐵股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2018229340 priority Critical
Priority to JP2018-229340 priority
Application filed by 日商日本製鐵股份有限公司 filed Critical 日商日本製鐵股份有限公司
Publication of TW202028632A publication Critical patent/TW202028632A/en

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00Vibration-dampers; Shock-absorbers
    • F16F7/10Vibration-dampers; Shock-absorbers using inertia effect

Abstract

An eddy-current type damper (1) includes: a cylindrical magnet holding member (5); a plurality of permanent magnets (6); a cylindrical conductive member (4); a screw shaft (2); a ball nut (3); and a connection mechanism (7). The permanent magnets (6) are fixed to the magnet holding member (5), and are disposed so as to be spaced apart from each other along the circumferential direction of the magnet holding member (5) and to be alternately reversed in magnetic pole arrangement along the circumferential direction. The conductive member (4) faces the permanent magnets (6) with a gap therebetween in the radial direction of the magnet holding member (5). The screw shaft (2) can reciprocate along the center axis direction of the magnet holding member (5). The ball nut (3) is engaged with the screw shaft (2), and movement of the screw shaft (2) causes relative rotation of the permanent magnets (6) and the conductive member (4). The connection mechanism (7) causes connection between the magnet holding member (5) and the conductive member (4) and causes the magnet holding member (5) and the conductive member (4) to rotate in opposite directions.

Description

渦電流式阻尼器Eddy current damper

本發明,是關於渦電流式阻尼器。The present invention relates to an eddy current type damper.

為了從地震等的振動來保護建築物,在建築物安裝有制振裝置。制振裝置是將賦予至建築物的運動能量變換為熱能等之其他的能量,藉此抑制建築物的搖晃。作為這種制振裝置,已知有渦電流式阻尼器。In order to protect the building from vibrations such as earthquakes, a vibration damping device is installed in the building. The vibration damping device converts the kinetic energy applied to the building into other energy such as heat energy, thereby suppressing the shaking of the building. As such a vibration damping device, an eddy current type damper is known.

渦電流式阻尼器,例如揭示於日本特公平5-86496號公報(專利文獻1)。The eddy current type damper is disclosed in, for example, Japanese Patent Publication No. 5-86496 (Patent Document 1).

專利文獻1的渦電流式阻尼器,具備:安裝在主筒的複數個永久磁鐵、連接於螺紋軸的磁滯材、與螺紋軸咬合的滾珠螺母、連接於滾珠螺母的副筒。複數個永久磁鐵,其磁極的配置是交互相異。磁滯材,是與複數個永久磁鐵相對向,而可相對旋轉。若對該渦電流式阻尼器賦予運動能量的話,副筒及滾珠螺母會往軸方向往復移動,藉由滾珠螺桿的作用來使磁滯材旋轉。藉此,產生磁滯損而消費運動能量。且,由於在磁滯材產生渦電流,故因渦電流損而消費運動能量,來得到阻尼力,這些都記載於專利文獻1。The eddy current damper of Patent Document 1 includes a plurality of permanent magnets attached to a main cylinder, a hysteresis material connected to a screw shaft, a ball nut engaged with the screw shaft, and an auxiliary cylinder connected to the ball nut. The arrangement of the magnetic poles of a plurality of permanent magnets is mutually different. The hysteresis material is opposed to a plurality of permanent magnets and can rotate relatively. If kinetic energy is applied to the eddy current damper, the auxiliary cylinder and the ball nut will reciprocate in the axial direction, and the hysteresis material will be rotated by the action of the ball screw. In this way, hysteresis loss is generated and exercise energy is consumed. In addition, since the eddy current is generated in the hysteresis material, the kinetic energy is consumed due to the eddy current loss, and the damping force is obtained. These are described in Patent Document 1.

但是,在專利文獻1的渦電流式阻尼器,是在滾珠螺母的往復移動範圍之端部切換磁滯材的旋轉方向。因此,隨著滾珠螺母接近往復移動範圍之端部,磁滯材的旋轉速度會降低,所產生之渦電流的強度會變弱。亦即,專利文獻1的渦電流式阻尼器在其構造上,在滾珠螺母的往復移動範圍之端部附近無法避免渦電流之阻尼力的降低。However, in the eddy current damper of Patent Document 1, the rotation direction of the hysteresis material is switched at the end of the reciprocating movement range of the ball nut. Therefore, as the ball nut approaches the end of the reciprocating movement range, the rotation speed of the hysteresis material will decrease, and the intensity of the generated eddy current will become weaker. In other words, the eddy current damper of Patent Document 1 cannot avoid the reduction of the damping force of the eddy current in the vicinity of the end of the reciprocating movement range of the ball nut due to its structure.

另一方面,作為安裝於建築物的阻尼器,除了渦電流式阻尼器以外已知有使用黏性流體的流體式阻尼器。在流體式阻尼器也是使活塞往復移動藉此得到阻尼力,故在活塞之往復移動範圍的端部附近阻尼力會降低。On the other hand, as a damper installed in a building, a fluid damper using a viscous fluid is known in addition to an eddy current damper. In the fluid damper, the piston reciprocates to obtain the damping force, so the damping force is reduced near the end of the reciprocating movement range of the piston.

將該流體式阻尼器之往復移動範圍的端部附近之阻尼力降低之問題予以改善的技術,揭示於國際公開第2007/091399號(專利文獻2)。A technique to improve the problem of the reduction of the damping force near the end of the reciprocating movement range of the fluid damper is disclosed in International Publication No. 2007/091399 (Patent Document 2).

在專利文獻2的流體式阻尼器,是將磁性流體封入液壓缸內,活塞桿由磁性部及非磁性部所構成。在活塞桿位於往復移動範圍之中央附近的情況,是與通常的流體式阻尼器同樣以磁性流體的黏性阻抗來得到阻尼力。另一方面,若活塞桿接近往復移動範圍之端部附近的話,活塞桿的磁性部會接近磁場產生裝置(磁鐵等),藉此形成磁路。藉由該磁路的磁場使磁性流體的黏性阻抗變高,故可提升往復移動範圍之端部附近的阻尼力,這些都記載於專利文獻2。 [先前技術文獻] [專利文獻]In the fluid damper of Patent Document 2, a magnetic fluid is enclosed in a hydraulic cylinder, and the piston rod is composed of a magnetic part and a non-magnetic part. In the case where the piston rod is located near the center of the reciprocating movement range, the damping force is obtained by the viscous resistance of the magnetic fluid as in a normal fluid damper. On the other hand, if the piston rod approaches the end of the reciprocating range, the magnetic part of the piston rod approaches the magnetic field generating device (magnet, etc.), thereby forming a magnetic circuit. The magnetic field of the magnetic circuit increases the viscous resistance of the magnetic fluid, so that the damping force near the end of the reciprocating movement range can be increased. These are described in Patent Document 2. [Prior Technical Literature] [Patent Literature]

[專利文獻1]日本特公平5-86496號公報 [專利文獻2]國際公開第2007/091399號[Patent Document 1] Japanese Patent Publication No. 5-86496 [Patent Document 2] International Publication No. 2007/091399

[發明所欲解決之問題][The problem to be solved by the invention]

但是,專利文獻2的技術,是關於流體式阻尼器者,與渦電流式阻尼器的構造有著根本上的差異。因此,難以將專利文獻2的技術採用至渦電流式阻尼器。However, the technology of Patent Document 2 is related to a fluid type damper, and is fundamentally different in structure from an eddy current type damper. Therefore, it is difficult to adopt the technique of Patent Document 2 to an eddy current type damper.

本發明的目的,是提供使螺紋軸之往復移動範圍之端部附近的阻尼力提升的渦電流式阻尼器。 [解決問題之技術手段]The object of the present invention is to provide an eddy current type damper that improves the damping force near the end of the reciprocating movement range of a screw shaft. [Technical means to solve the problem]

本發明之實施形態的渦電流式阻尼器,含有:圓筒形狀的磁鐵保持構件、複數個永久磁鐵、圓筒形狀的導電構件、螺紋軸、滾珠螺母、連結機構。複數個永久磁鐵,固定於磁鐵保持構件。複數個永久磁鐵,沿著磁鐵保持構件的圓周方向彼此空出間隙來配置。複數個永久磁鐵,沿著圓周方向使磁極的配置交互地反轉。導電構件,是在磁鐵保持構件的徑方向與複數個永久磁鐵空出間隙而相對向。螺紋軸,可沿著磁鐵保持構件的中心軸方向往復移動。滾珠螺母,與螺紋軸咬合,使螺紋軸移動藉此使複數個永久磁鐵與導電構件相對旋轉。連結機構,將磁鐵保持構件與導電構件予以連接,使磁鐵保持構件與導電構件互相往反方向旋轉。 [發明之效果]The eddy current damper according to the embodiment of the present invention includes a cylindrical magnet holding member, a plurality of permanent magnets, a cylindrical conductive member, a screw shaft, a ball nut, and a coupling mechanism. A plurality of permanent magnets are fixed to the magnet holding member. The plurality of permanent magnets are arranged with a gap therebetween along the circumferential direction of the magnet holding member. A plurality of permanent magnets alternately reverse the arrangement of magnetic poles along the circumferential direction. The conductive member faces the plurality of permanent magnets with gaps in the radial direction of the magnet holding member. The screw shaft can reciprocate along the central axis of the magnet holding member. The ball nut is engaged with the threaded shaft, and the threaded shaft is moved to make the plurality of permanent magnets and the conductive member relatively rotate. The connecting mechanism connects the magnet holding member and the conductive member so that the magnet holding member and the conductive member rotate in opposite directions to each other. [Effects of Invention]

根據本發明的渦電流式阻尼器,可提升螺紋軸之往復移動範圍之端部附近的阻尼力。According to the eddy current damper of the present invention, the damping force near the end of the reciprocating movement range of the threaded shaft can be increased.

本實施形態的渦電流式阻尼器,含有:圓筒形狀的磁鐵保持構件、複數個永久磁鐵、圓筒形狀的導電構件、螺紋軸、滾珠螺母、連結機構。複數個永久磁鐵,固定於磁鐵保持構件。複數個永久磁鐵,沿著磁鐵保持構件的圓周方向彼此空出間隙來配置。複數個永久磁鐵,沿著圓周方向使磁極的配置交互地反轉。導電構件,是在磁鐵保持構件的徑方向與複數個永久磁鐵空出間隙而相對向。螺紋軸,可沿著磁鐵保持構件的中心軸方向往復移動。滾珠螺母,與螺紋軸咬合,使螺紋軸移動藉此使複數個永久磁鐵與導電構件相對旋轉。連結機構,將磁鐵保持構件與導電構件予以連接,使磁鐵保持構件與導電構件互相往反方向旋轉。The eddy current damper of this embodiment includes a cylindrical magnet holding member, a plurality of permanent magnets, a cylindrical conductive member, a screw shaft, a ball nut, and a coupling mechanism. A plurality of permanent magnets are fixed to the magnet holding member. The plurality of permanent magnets are arranged with a gap therebetween along the circumferential direction of the magnet holding member. A plurality of permanent magnets alternately reverse the arrangement of magnetic poles along the circumferential direction. The conductive member faces the plurality of permanent magnets with gaps in the radial direction of the magnet holding member. The screw shaft can reciprocate along the central axis of the magnet holding member. The ball nut is engaged with the threaded shaft, and the threaded shaft is moved to make the plurality of permanent magnets and the conductive member relatively rotate. The connecting mechanism connects the magnet holding member and the conductive member so that the magnet holding member and the conductive member rotate in opposite directions to each other.

根據如此構成的渦電流式阻尼器,若對渦電流式阻尼器施加振動,而使螺紋軸往軸方向變位的話,滾珠螺母會旋轉。藉由滾珠螺母的旋轉而使磁鐵保持構件(或導電構件)旋轉,使永久磁鐵與導電構件相對旋轉。此外,藉由連結機構的功能,導電構件(或磁鐵保持構件)與磁鐵保持構件(或導電構件)的旋轉方向是往反方向旋轉。藉此,可使永久磁鐵與導電構件的相對速度差變大,可使渦電流的阻尼力變大。According to the eddy current type damper constructed in this way, if vibration is applied to the eddy current type damper and the screw shaft is displaced in the axial direction, the ball nut rotates. The rotation of the ball nut rotates the magnet holding member (or the conductive member), so that the permanent magnet and the conductive member are relatively rotated. In addition, due to the function of the connecting mechanism, the rotation direction of the conductive member (or magnet holding member) and the magnet holding member (or conductive member) is reversed. Thereby, the relative speed difference between the permanent magnet and the conductive member can be increased, and the damping force of the eddy current can be increased.

且,磁鐵保持構件及導電構件是帶有加速度來旋轉,故在磁鐵保持構件及導電構件會各自產生慣性力。磁鐵保持構件及導電構件的旋轉方向為反轉時,亦即螺紋軸位在往復移動範圍之端部時,其慣性力成為最大,透過連結機構及滾珠螺母而傳達至螺紋軸,而作為抵抗螺紋軸之運動的阻抗力來運作。在本實施形態的渦電流式阻尼器,由於磁鐵保持構件及導電構件之雙方都旋轉,故慣性力比磁鐵保持構件及導電構件之任一方旋轉的渦電流式阻尼器還大。於是,在本實施形態的渦電流式阻尼器,螺紋軸位在往復移動範圍之端部附近時,可作用有比以往還大的慣性力所致的阻抗力。其結果,可在螺紋軸之往復移動範圍之端部附近提升對螺紋軸之運動的阻抗力。In addition, since the magnet holding member and the conductive member rotate with acceleration, the magnet holding member and the conductive member each generate inertial force. When the rotation direction of the magnet holding member and the conductive member is reversed, that is, when the threaded shaft is at the end of the reciprocating movement range, its inertial force becomes the maximum, which is transmitted to the threaded shaft through the connecting mechanism and the ball nut, and acts as a resistance thread The resistance of the movement of the axis to operate. In the eddy current damper of this embodiment, since both the magnet holding member and the conductive member rotate, the inertial force is larger than that of the eddy current damper in which either the magnet holding member and the conductive member rotate. Therefore, in the eddy current damper of the present embodiment, when the threaded shaft is located near the end of the reciprocating movement range, a resistive force due to inertial force greater than before can act. As a result, the resistance force to the movement of the screw shaft can be increased near the end of the reciprocating movement range of the screw shaft.

上述的渦電流式阻尼器為以下構成為佳。連結機構,含有:固定於磁鐵保持構件的第1齒輪、固定於導電構件的第2齒輪、與第1齒輪和第2齒輪咬合的遊星齒輪。The above-mentioned eddy current type damper is preferably configured as follows. The coupling mechanism includes a first gear fixed to the magnet holding member, a second gear fixed to the conductive member, and a pinion gear that meshes with the first gear and the second gear.

以下,參照圖式,詳細說明本發明的實施形態。對圖中相同或相當的部分附上相同符號且不重複該說明。Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. The same symbols are attached to the same or equivalent parts in the figures and the description is not repeated.

[第1實施形態] 圖1,是第1實施形態之渦電流式阻尼器之沿著軸方向之面的剖面圖。渦電流式阻尼器1,含有:磁鐵保持構件5、複數個永久磁鐵6、導電構件4、螺紋軸2、滾珠螺母3、連結機構7。又,在本說明書之「軸方向」是代表著螺紋軸2的中心軸方向,螺紋軸2的中心軸是與磁鐵保持構件5及導電構件4的中心軸一致。且,在本說明書之「徑方向」是代表著磁鐵保持構件5及導電構件4的半徑方向。本說明書之「圓周方向」是代表著磁鐵保持構件5及導電構件4的圓周方向。[First Embodiment] Fig. 1 is a cross-sectional view of the eddy current type damper of the first embodiment along the axial direction. The eddy current damper 1 includes a magnet holding member 5, a plurality of permanent magnets 6, a conductive member 4, a screw shaft 2, a ball nut 3, and a connecting mechanism 7. In addition, the "axial direction" in this specification represents the central axis direction of the threaded shaft 2, and the central axis of the threaded shaft 2 coincides with the central axis of the magnet holding member 5 and the conductive member 4. In addition, the “radial direction” in this specification means the radial direction of the magnet holding member 5 and the conductive member 4. The “circumferential direction” in this specification represents the circumferential direction of the magnet holding member 5 and the conductive member 4.

[磁鐵保持構件] 圖2,是圖1的一部分擴大圖。磁鐵保持構件5,為含有內周面及外周面的圓筒形狀。於內周面的內側收容有螺紋軸2的一部分及滾珠螺母3的一部分。於外周面固定有複數個永久磁鐵6。也就是說,磁鐵保持構件5,保持複數個永久磁鐵6。為了使來自永久磁鐵6的磁通難以漏出至外部,磁鐵保持構件5的材質以碳鋼、鑄鐵等之磁性體為佳。該情況時,磁鐵保持構件5,是發揮作為磁軛的功能。[Magnet holding member] Figure 2 is an enlarged view of a part of Figure 1. The magnet holding member 5 has a cylindrical shape including an inner peripheral surface and an outer peripheral surface. A part of the screw shaft 2 and a part of the ball nut 3 are housed inside the inner peripheral surface. A plurality of permanent magnets 6 are fixed to the outer peripheral surface. In other words, the magnet holding member 5 holds a plurality of permanent magnets 6. In order to prevent the magnetic flux from the permanent magnet 6 from leaking to the outside, the material of the magnet holding member 5 is preferably a magnetic body such as carbon steel or cast iron. In this case, the magnet holding member 5 functions as a yoke.

磁鐵保持構件5之一方的端部,透過後述的第1齒輪7A而固定於滾珠螺母3的凸緣部。於是,若滾珠螺母3旋轉,伴隨於此磁鐵保持構件5亦旋轉。磁鐵保持構件5之另一方的端部成為自由端,透過推力軸承24而被外殼8支撐。One end part of the magnet holding member 5 is fixed to the flange part of the ball nut 3 through the 1st gear 7A mentioned later. Then, if the ball nut 3 rotates, the magnet holding member 5 also rotates accompanying this. The other end of the magnet holding member 5 becomes a free end and is supported by the housing 8 through the thrust bearing 24.

[永久磁鐵] 圖3,是圖1中的III-III線剖面圖。在圖3,僅圖示出磁鐵保持構件5、複數個永久磁鐵6及導電構件4,其他構造的圖示被省略。複數個永久磁鐵6,固定於磁鐵保持構件5的外周面。複數個永久磁鐵6,配列於磁鐵保持構件5的圓周方向,在彼此相鄰的兩個永久磁鐵6之間設有間隙。[permanent magnet] Fig. 3 is a sectional view taken along the line III-III in Fig. 1. In FIG. 3, only the magnet holding member 5, the plurality of permanent magnets 6, and the conductive member 4 are shown, and the illustration of other structures is omitted. The plural permanent magnets 6 are fixed to the outer peripheral surface of the magnet holding member 5. The plurality of permanent magnets 6 are arranged in the circumferential direction of the magnet holding member 5, and a gap is provided between two permanent magnets 6 adjacent to each other.

圖4,是圖3的一部分擴大圖。複數個永久磁鐵6,在徑方向與導電構件4的內周面空出間隙而相對向。間隙的大小,為了使來自永久磁鐵6的磁通有效率地到達導電構件4,是盡可能越小越好。且,各永久磁鐵6與導電構件4的內周面之間距離為固定為佳。Fig. 4 is an enlarged view of a part of Fig. 3. The plurality of permanent magnets 6 face the inner circumferential surface of the conductive member 4 with a gap in the radial direction. The size of the gap is as small as possible in order for the magnetic flux from the permanent magnet 6 to reach the conductive member 4 efficiently. In addition, the distance between each permanent magnet 6 and the inner peripheral surface of the conductive member 4 is preferably fixed.

複數個永久磁鐵6,是沿著磁鐵保持構件5的圓周方向使磁極的配置交互地反轉來配列。換句話說,在磁鐵保持構件5之圓周方向相鄰的永久磁鐵6彼此是交互地使磁極的配置反轉。又,在圖4,雖示出永久磁鐵6之磁極的配置為導電構件4之徑方向的情況,但磁極的配置並不限於此。例如永久磁鐵6之磁極的配置為磁鐵保持構件5的軸方向(亦即螺紋軸的軸方向)亦可。The plural permanent magnets 6 are arranged by alternately inverting the arrangement of magnetic poles along the circumferential direction of the magnet holding member 5. In other words, the permanent magnets 6 adjacent to each other in the circumferential direction of the magnet holding member 5 alternately reverse the arrangement of the magnetic poles. In addition, in FIG. 4, although the arrangement of the magnetic poles of the permanent magnet 6 is in the radial direction of the conductive member 4, the arrangement of the magnetic poles is not limited to this. For example, the magnetic poles of the permanent magnet 6 may be arranged in the axial direction of the magnet holding member 5 (that is, the axial direction of the screw shaft).

[導電構件] 參照圖1,導電構件4為圓筒形狀。於導電構件4的內部(圓筒的內部空間),收容有:螺紋軸2的一部分、滾珠螺母3的一部分、磁鐵保持構件5及永久磁鐵6。也就是說,導電構件4配置在磁鐵保持構件5的外側。就其他觀點來看,導電構件4是與磁鐵保持構件5同心狀地配置。導電構件4包圍磁鐵保持構件5。由於是藉由永久磁鐵6所形成的磁場來產生渦電流,故導電構件4的材質是鋼等之具有導電性的材料。[Conductive member] 1, the conductive member 4 has a cylindrical shape. Inside the conductive member 4 (the inner space of the cylinder), a part of the screw shaft 2, a part of the ball nut 3, the magnet holding member 5 and the permanent magnet 6 are housed. That is, the conductive member 4 is arranged outside the magnet holding member 5. From another point of view, the conductive member 4 is arranged concentrically with the magnet holding member 5. The conductive member 4 surrounds the magnet holding member 5. Since the eddy current is generated by the magnetic field formed by the permanent magnet 6, the material of the conductive member 4 is a conductive material such as steel.

參照圖2,導電構件4之一方的端部成為自由端,透過後述之第2齒輪7B、推力軸承24、及齒輪固定構件7D而被外殼8支撐。導電構件4之另一方的端部成為自由端,透過推力軸承24而被外殼8支撐。2, one end of the conductive member 4 becomes a free end, and is supported by the housing 8 through the second gear 7B, the thrust bearing 24, and the gear fixing member 7D described later. The other end of the conductive member 4 becomes a free end and is supported by the housing 8 through the thrust bearing 24.

[螺紋軸] 參照圖1,螺紋軸2,為直線狀延伸的構件,於外周面形成有螺紋部。螺紋軸2,固定於安裝在建築物的安裝件22。若建築物搖晃時,其振動會透過安裝件22傳達給螺紋軸2。藉此,螺紋軸2會往軸方向變位,而與振動同步地往復移動。[Threaded shaft] 1, the threaded shaft 2 is a member extending linearly, and a threaded portion is formed on the outer peripheral surface. The screw shaft 2 is fixed to a mounting member 22 installed in a building. If the building shakes, its vibration will be transmitted to the threaded shaft 2 through the mounting part 22. As a result, the threaded shaft 2 is displaced in the axial direction and reciprocates in synchronization with the vibration.

在圖1,表示螺紋軸2位在往復移動中央位置的狀態。所謂往復移動中央位置,代表著沿著螺紋軸2之軸方向的往復移動範圍之中央。渦電流式阻尼器1,在螺紋軸2位於往復移動中央位置的狀態下,安裝於建築物。Fig. 1 shows a state where the screw shaft 2 is positioned at the center of the reciprocating movement. The so-called reciprocating movement center position represents the center of the reciprocating movement range along the axial direction of the screw shaft 2. The eddy current type damper 1 is installed in a building with the threaded shaft 2 at the center of the reciprocating movement.

[滾珠螺母] 滾珠螺母3,是與螺紋軸2構成滾珠螺桿。螺紋軸2往軸方向變位的話滾珠螺母3會旋轉。亦即,滾珠螺母3是將螺紋軸2的並進運動變換成旋轉運動。[Ball nut] The ball nut 3 and the threaded shaft 2 constitute a ball screw. When the threaded shaft 2 is displaced in the axial direction, the ball nut 3 will rotate. That is, the ball nut 3 transforms the parallel movement of the threaded shaft 2 into a rotational movement.

滾珠螺母3,含有:貫通孔、凸緣部。於貫通孔插通有螺紋軸2。於貫通孔的內周面,形成有與螺紋軸2的螺紋部咬合的螺紋部。凸緣部,從軸方向觀看時為中空的圓板形狀(環形狀)。The ball nut 3 includes a through hole and a flange. A threaded shaft 2 is inserted into the through hole. On the inner peripheral surface of the through hole, a threaded portion that meshes with the threaded portion of the threaded shaft 2 is formed. The flange portion has a hollow disc shape (ring shape) when viewed from the axial direction.

[連結機構] 參照圖2,連結機構7,含有:第1齒輪7A、第2齒輪7B、遊星齒輪7C。第1齒輪7A及第2齒輪7B均為環形狀,彼此配置成同心狀。在本實施形態,固定有第2齒輪7B的導電構件4,是配置在固定有第1齒輪7A的磁鐵保持構件5之外側。因此,第2齒輪7B包圍第1齒輪7A。[Link organization] 2, the connecting mechanism 7 includes a first gear 7A, a second gear 7B, and a planetary gear 7C. Both the first gear 7A and the second gear 7B have a ring shape and are arranged concentrically with each other. In this embodiment, the conductive member 4 to which the second gear 7B is fixed is arranged outside the magnet holding member 5 to which the first gear 7A is fixed. Therefore, the second gear 7B surrounds the first gear 7A.

圖5,是圖1中的V-V線剖面圖。在圖5,僅圖示出連結機構7,其他構造的圖示被省略。第1齒輪7A為環形狀,於外周面形成有齒。也就是說,第1齒輪7A為外齒齒輪。第1齒輪7A之齒的種類並未特別限定。第1齒輪7A,例如為平齒、斜齒等。第2齒輪7B為環形狀,於內周面形成有齒。也就是說,第2齒輪7B為內齒齒輪。第2齒輪7B之齒的種類並未特別限定,但與第1齒輪7A之齒為相同種類。第2齒輪7B之內周面的直徑,比第1齒輪7A之外周面的直徑還大。遊星齒輪7C,與第1齒輪7A及第2齒輪7B咬合。亦即,遊星齒輪7C,在徑方向配置於第1齒輪7A與第2齒輪7B之間。連結機構7,亦可含有兩個以上的遊星齒輪7C。該情況時,複數個遊星齒輪7C是沿著圓周方向以等間隔來配置為佳。Fig. 5 is a sectional view taken along the line V-V in Fig. 1. In FIG. 5, only the connection mechanism 7 is illustrated, and the illustration of other structures is omitted. The first gear 7A has a ring shape, and teeth are formed on the outer peripheral surface. That is, the first gear 7A is an external gear. The type of teeth of the first gear 7A is not particularly limited. The first gear 7A is, for example, flat teeth, helical teeth, or the like. The second gear 7B has a ring shape and has teeth formed on the inner peripheral surface. That is, the second gear 7B is an internal gear. The type of teeth of the second gear 7B is not particularly limited, but is the same type as the teeth of the first gear 7A. The diameter of the inner peripheral surface of the second gear 7B is larger than the diameter of the outer peripheral surface of the first gear 7A. The planetary gear 7C meshes with the first gear 7A and the second gear 7B. That is, the planetary gear 7C is arranged between the first gear 7A and the second gear 7B in the radial direction. The connecting mechanism 7 may also include more than two planetary gears 7C. In this case, the plural planetary gears 7C are preferably arranged at equal intervals along the circumferential direction.

參照圖2,第1齒輪7A,配置在磁鐵保持構件5之一方的端部與滾珠螺母3的凸緣部之間。第1齒輪7A,固定於磁鐵保持構件5及滾珠螺母3之雙方。固定方法並未特別限定,但例如螺栓的締結、接著劑的接著等。第1齒輪7A與滾珠螺母3同步旋轉,伴隨於此磁鐵保持構件5亦與滾珠螺母3同步旋轉。2, the first gear 7A is arranged between one end of the magnet holding member 5 and the flange of the ball nut 3. The first gear 7A is fixed to both the magnet holding member 5 and the ball nut 3. The fixing method is not particularly limited, but for example, the connection of a bolt, the bonding of an adhesive, and the like. The first gear 7A rotates synchronously with the ball nut 3, and with this, the magnet holding member 5 also rotates synchronously with the ball nut 3.

第2齒輪7B,配置在導電構件4之一方的端部與推力軸承24之間。第2齒輪7B,固定於導電構件4及推力軸承24之雙方。推力軸承24透過齒輪固定構件7D而被外殼8支撐。第2齒輪7B可對外殼8旋轉。伴隨著第2齒輪7B的旋轉,導電構件4亦可與第2齒輪7B同步旋轉。The second gear 7B is arranged between one end of the conductive member 4 and the thrust bearing 24. The second gear 7B is fixed to both the conductive member 4 and the thrust bearing 24. The thrust bearing 24 is supported by the housing 8 through the gear fixing member 7D. The second gear 7B can rotate with respect to the housing 8. Along with the rotation of the second gear 7B, the conductive member 4 may also rotate in synchronization with the second gear 7B.

遊星齒輪7C、第1齒輪7A及第2齒輪7B,配置在可於軸方向互相咬合的位置,較佳為配置在軸方向相同的位置。The planetary gear 7C, the first gear 7A, and the second gear 7B are arranged at positions capable of meshing with each other in the axial direction, and preferably arranged at the same positions in the axial direction.

連結機構7,亦可進一步含有齒輪固定構件7D。齒輪固定構件7D,固定於外殼8。齒輪固定構件7D,將遊星齒輪7C支撐成可旋轉,且限制遊星齒輪7C之軸方向、徑方向及圓周方向的移動。藉由設置這種齒輪固定構件7D,可使遊星齒輪7C穩定地與第1齒輪7A及第2齒輪7B咬合。The connection mechanism 7 may further include a gear fixing member 7D. The gear fixing member 7D is fixed to the housing 8. The gear fixing member 7D supports the planetary gear 7C to be rotatable and restricts the movement of the planetary gear 7C in the axial, radial and circumferential directions. By providing such a gear fixing member 7D, the pinion gear 7C can be stably engaged with the first gear 7A and the second gear 7B.

連結機構7,亦可複數含有齒輪固定構件7D。亦即,在複數設置遊星齒輪7C的情況,以一個齒輪固定構件7D來支撐一個遊星齒輪7C亦可。但是,齒輪固定構件7D的數量為一個亦可,用一個齒輪固定構件7D來支撐複數個遊星齒輪7C亦可。The connection mechanism 7 may include plural gear fixing members 7D. That is, in the case where plural planetary gears 7C are provided, one planetary gear 7C may be supported by one gear fixing member 7D. However, the number of gear fixing members 7D may be one, and one gear fixing member 7D may support a plurality of planetary gears 7C.

針對對這種構造之第1實施形態的渦電流式阻尼器施加振動的情況之動作進行說明。The operation when vibration is applied to the eddy current damper of the first embodiment of this structure will be described.

若對建築物施加振動的話,該振動會傳達至安裝件22,使螺紋軸2於軸方向變位。當螺紋軸2變位時,因滾珠螺桿的作用而使滾珠螺母3、第1齒輪7A、磁鐵保持構件5及複數個永久磁鐵6往同一方向旋轉。使第1齒輪7A旋轉,藉此使與第1齒輪7A咬合的遊星齒輪7C旋轉,並使與遊星齒輪7C咬合的第2齒輪7B旋轉。If vibration is applied to the building, the vibration will be transmitted to the attachment 22, and the threaded shaft 2 will be displaced in the axial direction. When the screw shaft 2 is displaced, the ball nut 3, the first gear 7A, the magnet holding member 5, and the plurality of permanent magnets 6 rotate in the same direction due to the action of the ball screw. By rotating the first gear 7A, the pinion gear 7C engaged with the first gear 7A is rotated, and the second gear 7B engaged with the pinion gear 7C is rotated.

在此,因遊星齒輪7C的功能,第2齒輪7B的旋轉方向,是與第1齒輪7A的旋轉方向成為反方向。於第2齒輪7B固定有導電構件4,故導電構件4亦往與第1齒輪7A相反的方向旋轉。亦即,在第1實施形態的渦電流式阻尼器,施加有振動時,導電構件4與複數個永久磁鐵6(磁鐵保持構件5)會互相往反方向旋轉。Here, due to the function of the planetary gear 7C, the rotation direction of the second gear 7B is opposite to the rotation direction of the first gear 7A. Since the conductive member 4 is fixed to the second gear 7B, the conductive member 4 also rotates in the opposite direction to the first gear 7A. That is, in the eddy current damper of the first embodiment, when vibration is applied, the conductive member 4 and the plurality of permanent magnets 6 (magnet holding members 5) rotate in opposite directions to each other.

接著,針對如此動作之第1實施形態之渦電流式阻尼器的阻尼力進行說明。作為第1實施形態之渦電流式阻尼器的阻尼力,有著渦電流所致之阻尼力、慣性力所致之阻抗力。Next, the damping force of the eddy current type damper of the first embodiment operated in this way will be described. As the damping force of the eddy current damper of the first embodiment, there are damping force due to eddy current and resistive force due to inertial force.

[渦電流所致之阻尼力] 圖6,是表示第1實施形態之渦電流式阻尼器之磁通路的示意圖。複數個永久磁鐵6,其鄰接之永久磁鐵6彼此的磁極為反轉。因此,由某永久磁鐵6的N極出來的磁通,會通過磁鐵保持構件5,到達鄰接之永久磁鐵6的S極。由該永久磁鐵6的N極出來的磁通,會通過導電構件4,到達永久磁鐵6的S極。亦即,藉由鄰接的兩個永久磁鐵6、磁鐵保持構件5及導電構件4,形成磁路。[Damping force caused by eddy current] Fig. 6 is a schematic diagram showing the magnetic path of the eddy current type damper of the first embodiment. In the plural permanent magnets 6, the magnetic poles of the adjacent permanent magnets 6 are reversed. Therefore, the magnetic flux from the N pole of a certain permanent magnet 6 passes through the magnet holding member 5 and reaches the S pole of the adjacent permanent magnet 6. The magnetic flux from the N pole of the permanent magnet 6 passes through the conductive member 4 and reaches the S pole of the permanent magnet 6. That is, the two adjacent permanent magnets 6, the magnet holding member 5, and the conductive member 4 form a magnetic circuit.

若對渦電流式阻尼器施加振動,而使複數個永久磁鐵6與導電構件4相對旋轉的話,通過導電構件4之內周面的磁通會變化,而在導電構件4產生渦電流。若產生渦電流的話,會產生新的磁通(抗磁場)。該抗磁場,會往妨礙導電構件4之旋轉的方向運作。由於導電構件4是透過連結機構7而與磁鐵保持構件5連動來旋轉,故導電構件4的旋轉被妨礙的話,磁鐵保持構件5的旋轉(亦即滾珠螺母3的旋轉)會被妨礙。若滾珠螺母3的旋轉被妨礙的話,螺紋軸2之往軸方向的運動亦被妨礙,使振動衰減。這就成為渦電流所致之阻尼力。If vibration is applied to the eddy current damper and the plurality of permanent magnets 6 and the conductive member 4 are relatively rotated, the magnetic flux passing through the inner peripheral surface of the conductive member 4 changes, and an eddy current is generated in the conductive member 4. If eddy current is generated, new magnetic flux (diamagnetic field) will be generated. The diamagnetic field will operate in a direction that hinders the rotation of the conductive member 4. Since the conductive member 4 rotates in conjunction with the magnet holding member 5 through the coupling mechanism 7, if the rotation of the conductive member 4 is hindered, the rotation of the magnet holding member 5 (that is, the rotation of the ball nut 3) is hindered. If the rotation of the ball nut 3 is hindered, the movement of the threaded shaft 2 in the axial direction is also hindered, and the vibration is attenuated. This becomes the damping force caused by the eddy current.

渦電流所致之阻尼力的強度,是依存於複數個永久磁鐵6與導電構件4之間相對的旋轉速度差。在此點,第1實施形態的渦電流式阻尼器,由於複數個永久磁鐵6(磁鐵保持構件5)與導電構件4是互相往反方向旋轉,故與只有複數個永久磁鐵6及導電構件4之任一方旋轉的情況相較之下,可使複數個永久磁鐵6與導電構件4之間的相對速度差變大。The strength of the damping force caused by the eddy current depends on the relative rotational speed difference between the permanent magnets 6 and the conductive member 4. At this point, in the eddy current damper of the first embodiment, since the plurality of permanent magnets 6 (magnet holding member 5) and the conductive member 4 rotate in opposite directions to each other, it differs from only the plurality of permanent magnets 6 and the conductive member 4. Compared with the case where either one rotates, the relative speed difference between the plurality of permanent magnets 6 and the conductive member 4 can be made larger.

也就是說,根據第1實施形態的渦電流式阻尼器,即使滾珠螺母3的旋轉速度與以往相同,亦可得到更大的渦電流所致之阻尼力。接著,針對慣性力所致之阻抗力進行說明。That is, according to the eddy current damper of the first embodiment, even if the rotation speed of the ball nut 3 is the same as in the past, a larger damping force due to the eddy current can be obtained. Next, the resistive force caused by the inertial force will be described.

[慣性力所致之阻抗力] 參照圖1,在上述般的第1實施形態之渦電流式阻尼器,若對渦電流式阻尼器施加有振動的話,與振動同步地使螺紋軸2沿著軸方向往復移動,而作用有上述之渦電流所致之阻尼力。[Resistance force caused by inertial force] 1, in the eddy current damper of the first embodiment as described above, if vibration is applied to the eddy current damper, the threaded shaft 2 is reciprocated in the axial direction in synchronization with the vibration, and the above action The damping force caused by the eddy current.

但是,渦電流所致之阻尼力,並非經常固定,而是因應距往復移動中央位置的螺紋軸2之變位(螺紋軸2之軸方向的速度)而變動。However, the damping force caused by the eddy current is not always fixed, but fluctuates in response to the displacement of the threaded shaft 2 from the center of the reciprocating movement (the speed of the threaded shaft 2 in the axial direction).

圖7,是表示對渦電流式阻尼器施加正弦波之振動的情況之螺紋軸的變位、速度及加速度的圖。在圖7,將螺紋軸的往復移動中央位置設為相位0。觀察螺紋軸的變位及速度的圖表,隨著螺紋軸的變位從往復移動中央位置接近往復移動範圍之端部(π/2),螺紋軸的速度會降低,在往復移動範圍之端部,速度成為0。之後,螺紋軸改變移動的方向。隨著螺紋軸的變位從往復移動之端部朝向往復移動中央位置(π),螺紋軸的速度會增加,且在往復移動中央位置成為最大。螺紋軸的速度與產生於導電構件的渦電流之強度成比例。因此,渦電流所致之阻尼力,在螺紋軸的往復移動中央位置成為最大,隨著接近往復移動範圍之端部而變弱,在往復移動範圍之端部成為0。Fig. 7 is a diagram showing the displacement, velocity, and acceleration of the threaded shaft when a sine wave vibration is applied to the eddy current type damper. In Fig. 7, the reciprocating movement center position of the screw shaft is set to phase 0. Observe the graph of the displacement and speed of the threaded shaft. As the displacement of the threaded shaft approaches the end of the reciprocating range (π/2) from the center of the reciprocating movement, the speed of the threaded shaft will decrease at the end of the reciprocating movement range. , The speed becomes 0. After that, the threaded shaft changes the direction of movement. With the displacement of the threaded shaft from the end of the reciprocating movement to the reciprocating center position (π), the speed of the threaded shaft will increase and become the maximum at the reciprocating center position. The speed of the screw shaft is proportional to the intensity of the eddy current generated in the conductive member. Therefore, the damping force caused by the eddy current becomes the largest at the center of the reciprocating movement of the threaded shaft, becomes weaker as it approaches the end of the reciprocating movement range, and becomes zero at the end of the reciprocating movement range.

另一方面,觀察螺紋軸的變位及加速度的圖表,隨著螺紋軸的變位從往復移動中央位置接近往復移動範圍之端部(π/2),螺紋軸的加速度會增加,且在往復移動範圍之端部成為最大。這點,在透過連結機構及滾珠螺母而與螺紋軸連動的磁鐵保持構件及導電構件之旋轉方向的加速度亦相同。也就是說,螺紋軸位在往復移動範圍之端部時,磁鐵保持構件及導電構件之旋轉方向的加速度成為最大。On the other hand, observe the graph of the displacement and acceleration of the threaded shaft. As the displacement of the threaded shaft moves from the center of the reciprocating movement to the end of the reciprocating range (π/2), the acceleration of the threaded shaft will increase and it will reciprocate. The end of the moving range becomes the largest. This point is the same for the acceleration in the rotation direction of the magnet holding member and the conductive member that are linked to the screw shaft through the coupling mechanism and the ball nut. That is, when the screw shaft is positioned at the end of the reciprocating movement range, the acceleration in the rotation direction of the magnet holding member and the conductive member becomes the maximum.

在此,若物體加速的話,在與加速度之朝向相反的方向會作用有慣性力是眾所皆知。針對磁鐵保持構件及導電構件來觀看這點的話,螺紋軸位在往復移動範圍之端部時,磁鐵保持構件及導電構件的加速度會成為最大,故磁鐵保持構件及導電構件的慣性力亦成為最大。然後,磁鐵保持構件及導電構件的慣性力會透過連結機構及滾珠螺母傳達至螺紋軸,其朝向成為妨礙螺紋軸朝向往復移動中央位置的方向。也就是說,藉由磁鐵保持構件及導電構件的慣性力,螺紋軸之往軸方向的運動被妨礙,使得螺紋軸的移動量降低。Here, if an object accelerates, it is well known that inertial force will act in the direction opposite to the direction of acceleration. Looking at this point for the magnet holding member and the conductive member, when the screw shaft is at the end of the reciprocating movement range, the acceleration of the magnet holding member and the conductive member will be the largest, so the inertial force of the magnet holding member and the conductive member will also be the largest . Then, the inertial force of the magnet holding member and the conductive member is transmitted to the threaded shaft through the coupling mechanism and the ball nut, and its orientation is a direction that prevents the threaded shaft from moving toward the center position of the reciprocation. In other words, due to the inertial force of the magnet holding member and the conductive member, the movement of the screw shaft in the axial direction is hindered, so that the movement amount of the screw shaft is reduced.

參照圖1,在第1實施形態的渦電流式阻尼器1,磁鐵保持構件5及導電構件4是互相往反方向旋轉。因此,對於由第1實施形態的渦電流式阻尼器1所產生之慣性力所致之螺紋軸2之運動的阻抗力,會比只有磁鐵保持構件5及導電構件4之任一方旋轉的渦電流式阻尼器1所產生之慣性力所致之阻抗力還大。此外,磁鐵保持構件5及導電構件4之慣性力的大小,依存於磁鐵保持構件5及導電構件4之徑方向的大小。這點,在第1實施形態的渦電流式阻尼器1,導電構件4配置在磁鐵保持構件5的徑方向外側故徑方向較大。於是,導電構件4之慣性力的大小可變得更大,對於慣性力所致之螺紋軸2之運動的阻抗力可進一步變大。1, in the eddy current damper 1 of the first embodiment, the magnet holding member 5 and the conductive member 4 rotate in opposite directions to each other. Therefore, the resistive force of the movement of the screw shaft 2 caused by the inertial force generated by the eddy current damper 1 of the first embodiment is higher than that of the eddy current when only one of the magnet holding member 5 and the conductive member 4 rotates. The resistive force caused by the inertial force generated by the type damper 1 is still large. In addition, the magnitude of the inertial force of the magnet holding member 5 and the conductive member 4 depends on the magnitude of the magnet holding member 5 and the conductive member 4 in the radial direction. In this regard, in the eddy current damper 1 of the first embodiment, the conductive member 4 is arranged on the outer side of the magnet holding member 5 in the radial direction, so the radial direction is larger. Therefore, the magnitude of the inertial force of the conductive member 4 can become larger, and the resistance force to the movement of the threaded shaft 2 caused by the inertial force can be further increased.

也就是說,在第1實施形態的渦電流式阻尼器1,導電構件4與磁鐵保持構件5(永久磁鐵6)是互相往反方向旋轉,故可使導電構件4與永久磁鐵6之間的相對速度差變大,可使渦電流所致之阻尼力變大。且,渦電流所致之阻尼力,雖隨著螺紋軸2接近往復移動範圍之端部而變弱,但這可藉由導電構件4及磁鐵保持構件5之雙方的慣性力所致之對螺紋軸2之運動的阻抗力來彌補。That is, in the eddy current damper 1 of the first embodiment, the conductive member 4 and the magnet holding member 5 (permanent magnet 6) rotate in opposite directions to each other, so the gap between the conductive member 4 and the permanent magnet 6 The larger the relative speed difference can increase the damping force caused by the eddy current. Moreover, although the damping force caused by the eddy current becomes weaker as the screw shaft 2 approaches the end of the reciprocating movement range, this can be caused by the inertial force of both the conductive member 4 and the magnet holding member 5. The resistance force of the movement of axis 2 compensates.

特別是,在可能對建築物造成嚴重災害的長周期振動,有著振幅(螺紋軸2的變位量)變大的傾向,故對這種大振幅之振動的衰減,第1實施形態的渦電流式阻尼器為有效。In particular, in the long-period vibration that may cause serious damage to the building, the amplitude (displacement amount of the screw shaft 2) tends to increase. Therefore, the attenuation of such large-amplitude vibration is the eddy current of the first embodiment Type dampers are effective.

且,在第1實施形態的渦電流式阻尼器1,是構成為使滾珠螺母3配置在導電構件4及磁鐵保持構件5的內部,且不於軸方向移動。藉由這種構造,沒有必要在渦電流式阻尼器設置滾珠螺母3之往軸方向的可動範圍,可使渦電流式阻尼器變小型。In addition, in the eddy current damper 1 of the first embodiment, the ball nut 3 is arranged inside the conductive member 4 and the magnet holding member 5 and does not move in the axial direction. With this structure, it is not necessary to provide the movable range of the ball nut 3 in the axial direction of the eddy current damper, and the eddy current damper can be reduced in size.

以上,針對第1實施形態的渦電流式阻尼器進行了說明。但是,本發明的渦電流式阻尼器,並不限於上述第1實施形態,亦可為下述般的實施形態。Above, the eddy current type damper of the first embodiment has been described. However, the eddy current damper of the present invention is not limited to the above-mentioned first embodiment, and may be the following embodiment.

[第2實施形態] 針對第2實施形態的渦電流式阻尼器進行說明。[Second Embodiment] The eddy current type damper of the second embodiment will be described.

圖8,是第2實施形態之渦電流式阻尼器之沿著軸方向之面之剖面圖的一部分擴大圖。第2實施形態的渦電流式阻尼器,就磁鐵保持構件5與導電構件4的配置關係相反這點,與第1實施形態的渦電流式阻尼器不同。且,就第1齒輪7A與第2齒輪7B的配置關係相反這點,亦與第1實施形態的渦電流式阻尼器不同。也就是說,在第2實施形態,固定有第1齒輪7A的磁鐵保持構件5,是配置在固定有第2齒輪7B的導電構件4之外側。該情況時,第1齒輪7A為內齒齒輪,第2齒輪7B為外齒齒輪。第2實施形態之渦電流式阻尼器之其他的構造,是與第1實施形態的渦電流式阻尼器相同故省略詳細的說明。Fig. 8 is a partially enlarged view of a cross-sectional view of a plane along the axial direction of the eddy current damper of the second embodiment. The eddy current damper of the second embodiment is different from the eddy current damper of the first embodiment in that the arrangement relationship between the magnet holding member 5 and the conductive member 4 is reversed. In addition, the arrangement relationship between the first gear 7A and the second gear 7B is reversed, which is also different from the eddy current damper of the first embodiment. That is, in the second embodiment, the magnet holding member 5 to which the first gear 7A is fixed is arranged outside the conductive member 4 to which the second gear 7B is fixed. In this case, the first gear 7A is an internal gear, and the second gear 7B is an external gear. The other structure of the eddy current type damper of the second embodiment is the same as that of the eddy current type damper of the first embodiment, so detailed description is omitted.

這種第2實施形態的渦電流式阻尼器也一樣,由於磁鐵保持構件5(永久磁鐵6)與導電構件4互相往反方向旋轉,故得到與第1實施形態的渦電流式阻尼器相同的效果。The eddy current damper of this second embodiment is the same. Since the magnet holding member 5 (permanent magnet 6) and the conductive member 4 rotate in opposite directions to each other, the same thing as the eddy current damper of the first embodiment is obtained. effect.

不過,如上述般,對渦電流式阻尼器施加振動,而使永久磁鐵6與導電構件4相對旋轉的話,會在導電構件4產生渦電流。此時,會因焦耳熱而使導電構件4溫度上昇並熱膨脹。在第1實施形態,固定有第2齒輪7B的導電構件4,配置在固定有第1齒輪7A的磁鐵保持構件5之外側。也就是說,第2齒輪7B配置在遊星齒輪7C的外側。該情況時,若導電構件4熱膨脹的話,第2齒輪7B與遊星齒輪7C之間的背隙會變大。相對於此,在第2實施形態,固定有第2齒輪7B的導電構件4,配置在固定有第1齒輪7A的磁鐵保持構件5之內側。也就是說,第2齒輪7B配置在遊星齒輪7C的內側。該情況時,若導電構件4熱膨脹的話,第2齒輪7B與遊星齒輪7C之間的背隙會變小。若第2齒輪7B與遊星齒輪7C之間的背隙變小的話,有著妨礙遊星齒輪7C之圓滑的旋轉之虞。於是,就確保遊星齒輪7C之圓滑的旋轉這觀點來看,第1實施形態比第2實施形態還好。However, as described above, if vibration is applied to the eddy current damper and the permanent magnet 6 and the conductive member 4 are relatively rotated, an eddy current is generated in the conductive member 4. At this time, the temperature of the conductive member 4 rises and thermally expands due to Joule heat. In the first embodiment, the conductive member 4 to which the second gear 7B is fixed is arranged outside the magnet holding member 5 to which the first gear 7A is fixed. That is, the second gear 7B is arranged outside the planetary gear 7C. In this case, if the conductive member 4 thermally expands, the backlash between the second gear 7B and the star gear 7C will increase. In contrast, in the second embodiment, the conductive member 4 to which the second gear 7B is fixed is arranged inside the magnet holding member 5 to which the first gear 7A is fixed. That is, the second gear 7B is arranged inside the planetary gear 7C. In this case, if the conductive member 4 thermally expands, the backlash between the second gear 7B and the planetary gear 7C becomes smaller. If the backlash between the second gear 7B and the planetary gear 7C becomes smaller, the smooth rotation of the planetary gear 7C may be hindered. Therefore, in terms of ensuring smooth rotation of the planetary gear 7C, the first embodiment is better than the second embodiment.

互相咬合之第2齒輪7B及遊星齒輪7C的齒形,為漸開線齒形為佳。只要為漸開線齒形彼此的咬合,即使是背隙有變動的情況亦可用固定的旋轉速度來咬合。也就是說,即使在導電構件4熱膨脹的情況,亦可維持永久磁鐵6與導電構件4之相對的旋轉速度。遊星齒輪7C的齒形為漸開線齒形的情況,與遊星齒輪7C咬合的第1齒輪7A亦為漸開線齒形為佳。The tooth profile of the second gear 7B and the planetary gear 7C that mesh with each other is preferably an involute tooth profile. As long as the involute tooth profile is engaged with each other, even if the backlash is fluctuating, it can be engaged with a fixed rotation speed. That is, even when the conductive member 4 thermally expands, the relative rotation speed of the permanent magnet 6 and the conductive member 4 can be maintained. If the tooth profile of the planetary gear 7C is an involute tooth profile, the first gear 7A meshed with the planetary gear 7C also has an involute tooth profile.

以上,針對本實施形態的渦電流式阻尼器進行了說明。其他,本發明並不限定於上述的實施形態,在不超脫本發明之主旨的範圍,自然可進行各種的變更。In the above, the eddy current type damper of this embodiment has been described. In addition, the present invention is not limited to the above-mentioned embodiment, and various changes can be made naturally within the scope not deviating from the gist of the present invention.

例如,第1實施形態及第2實施形態的渦電流式阻尼器中,並非將滾珠螺母3固定於磁鐵保持構件5,而是固定於導電構件4亦可。 [產業上的可利用性]For example, in the eddy current dampers of the first embodiment and the second embodiment, the ball nut 3 may not be fixed to the magnet holding member 5 but may be fixed to the conductive member 4. [Industrial availability]

本發明的渦電流式阻尼器,在建築物的制振裝置及避震裝置上為有用。The eddy current damper of the present invention is useful for vibration damping devices and shock absorbers of buildings.

1:渦電流式阻尼器 2:螺紋軸 3:滾珠螺母 4:導電構件 5:磁鐵保持構件 6:永久磁鐵 7:連結機構 7A:第1齒輪 7B:第2齒輪 7C:遊星齒輪 7D:齒輪固定構件 8:外殼 22:安裝件 24:推力軸承1: Eddy current damper 2: threaded shaft 3: Ball nut 4: conductive member 5: Magnet holding member 6: Permanent magnet 7: Linking institutions 7A: First gear 7B: 2nd gear 7C: Planetary Gear 7D: Gear fixing member 8: shell 22: Installation parts 24: Thrust bearing

[圖1],是第1實施形態之渦電流式阻尼器之沿著軸方向之面的剖面圖。 [圖2],是圖1的一部分擴大圖。 [圖3],是圖1中的III-III線剖面圖。 [圖4],是圖3的一部分擴大圖。 [圖5],是圖1中的V-V線剖面圖。 [圖6],是表示第1實施形態之渦電流式阻尼器之磁通路的示意圖。 [圖7],是表示對渦電流式阻尼器施加正弦波之振動的情況之螺紋軸的變位、速度及加速度的圖。 [圖8],是第2實施形態之渦電流式阻尼器之沿著軸方向之面之剖面圖的一部分擴大圖。[Fig. 1] is a cross-sectional view of the surface along the axial direction of the eddy current damper of the first embodiment. [Figure 2] is an enlarged view of a part of Figure 1. [Fig. 3] is a sectional view taken along the line III-III in Fig. 1. [Fig. [Fig. 4] is an enlarged view of a part of Fig. 3. [Fig. 5] is a sectional view taken along the line V-V in Fig. 1. [Fig. 6] is a schematic diagram showing the magnetic path of the eddy current type damper of the first embodiment. [Fig. 7] is a diagram showing the displacement, velocity, and acceleration of the screw shaft when the sine wave vibration is applied to the eddy current type damper. [Fig. 8] is a partially enlarged view of a cross-sectional view of a plane along the axial direction of the eddy current damper of the second embodiment.

2:螺紋軸 2: threaded shaft

3:滾珠螺母 3: Ball nut

4:導電構件 4: conductive member

5:磁鐵保持構件 5: Magnet holding member

6:永久磁鐵 6: Permanent magnet

7:連結機構 7: Linking institutions

7A:第1齒輪 7A: First gear

7B:第2齒輪 7B: 2nd gear

7C:遊星齒輪 7C: Planetary Gear

7D:齒輪固定構件 7D: Gear fixing member

8:外殼 8: shell

22:安裝件 22: Installation parts

24:推力軸承 24: Thrust bearing

Claims (2)

一種渦電流式阻尼器,具備: 圓筒形狀的磁鐵保持構件; 複數個永久磁鐵,其固定於前述磁鐵保持構件,沿著前述磁鐵保持構件的圓周方向彼此空出間隙來配置,且沿著前述圓周方向使磁極的配置交互地反轉; 圓筒形狀的導電構件,其在前述磁鐵保持構件的徑方向與前述複數個永久磁鐵空出間隙而相對向; 螺紋軸,其可沿著前述磁鐵保持構件的中心軸方向往復移動; 滾珠螺母,其與前述螺紋軸咬合,使前述螺紋軸移動藉此使前述複數個永久磁鐵與前述導電構件相對旋轉;以及 連結機構,其將前述磁鐵保持構件與前述導電構件予以連接,使前述磁鐵保持構件與前述導電構件互相往反方向旋轉。An eddy current type damper with: Cylindrical magnet holding member; A plurality of permanent magnets, which are fixed to the magnet holding member, are arranged with gaps between each other along the circumferential direction of the magnet holding member, and the arrangement of the magnetic poles is alternately reversed along the circumferential direction; A cylindrical conductive member facing the plurality of permanent magnets with a gap in the radial direction of the magnet holding member; A threaded shaft, which can reciprocate along the central axis of the aforementioned magnet holding member; A ball nut that engages with the threaded shaft to move the threaded shaft to thereby make the plurality of permanent magnets and the conductive member relatively rotate; and The connecting mechanism connects the magnet holding member and the conductive member to rotate the magnet holding member and the conductive member in opposite directions to each other. 如請求項1所述之渦電流式阻尼器,其中, 前述連結機構,含有: 固定於前述磁鐵保持構件的第1齒輪、 固定於前述導電構件的第2齒輪、 與前述第1齒輪及前述第2齒輪咬合的遊星齒輪。The eddy current type damper according to claim 1, wherein: The aforementioned linking mechanism includes: The first gear fixed to the magnet holding member, The second gear fixed to the aforementioned conductive member, A star gear that meshes with the first gear and the second gear.
TW108144208A 2018-12-06 2019-12-04 Eddy-current type damper TW202028632A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018229340 2018-12-06
JP2018-229340 2018-12-06

Publications (1)

Publication Number Publication Date
TW202028632A true TW202028632A (en) 2020-08-01

Family

ID=70975090

Family Applications (1)

Application Number Title Priority Date Filing Date
TW108144208A TW202028632A (en) 2018-12-06 2019-12-04 Eddy-current type damper

Country Status (3)

Country Link
JP (1) JPWO2020116344A1 (en)
TW (1) TW202028632A (en)
WO (1) WO2020116344A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013244841A (en) * 2012-05-25 2013-12-09 Ntn Corp Vehicular suspension device
DE102013203431A1 (en) * 2013-02-28 2014-08-28 Zf Friedrichshafen Ag Rotary damper for a vehicle
JP6104678B2 (en) * 2013-04-02 2017-03-29 株式会社東芝 Attenuator
JP2019183906A (en) * 2018-04-05 2019-10-24 株式会社免制震ディバイス Mass damper

Also Published As

Publication number Publication date
WO2020116344A1 (en) 2020-06-11
JPWO2020116344A1 (en) 2021-10-14

Similar Documents

Publication Publication Date Title
JP5925672B2 (en) Damping device and structure damping device
JP6104678B2 (en) Attenuator
JP2014126177A5 (en)
JP2007182986A (en) Vibration reducing damper
JP2019183906A (en) Mass damper
JP6594763B2 (en) Variable inertia mass damping device
TW202028632A (en) Eddy-current type damper
JP7040357B2 (en) Eddy current damper
KR102339773B1 (en) Eddy Current Damper
JP7050619B2 (en) Eddy current damper
JP2008202726A (en) Balancer mechanism for reciprocating engine
JP6594764B2 (en) Variable inertia mass damping device
JP2020070825A (en) Eddy current type damper
JP6067459B2 (en) Rotary damping device
CN109538725A (en) Dynamic damper
JP6245725B2 (en) Vibration isolator
JP6863465B2 (en) Eddy current damper
JP7040350B2 (en) Eddy current damper
JP6897525B2 (en) Eddy current damper
JP2020016309A (en) Eddy current type damper
JP2019157947A (en) Mass damper
JP2019078331A (en) Eddy current-type damper
JP2019078332A (en) Eddy current-type damper
JP2019100438A (en) Eddy current damper
JP2016111789A (en) Linear actuator and vibration-proofing device