TWI803900B - Coupling device - Google Patents
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- TWI803900B TWI803900B TW110124987A TW110124987A TWI803900B TW I803900 B TWI803900 B TW I803900B TW 110124987 A TW110124987 A TW 110124987A TW 110124987 A TW110124987 A TW 110124987A TW I803900 B TWI803900 B TW I803900B
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Abstract
一種聯軸器裝置,具有一軸座,軸座具有一穿孔,且在軸座之環周壁上徑向開設有數個組設槽,各組設槽中分別組設有一配重塊,而一止逆接頭組設於軸座之環周壁中,止逆接頭之內部形成有一可與穿孔相通之流道,流道中形成有一錐形孔,而一止逆件穿設於流道中,止逆件於相對錐形孔處形成有一與錐形孔之形狀相對應之斜錐面,且止逆件受一彈性件推抵以封閉流道,並在軸座之穿孔中穿設有一呈中空環狀之金屬薄環,金屬薄環之外徑小於穿孔之內徑,使金屬薄環與穿孔之環壁間形成有一供填注液壓油之容室。 A shaft coupling device, which has a shaft seat, the shaft seat has a perforation, and several group grooves are radially opened on the circumferential wall of the shaft seat, and a counterweight is respectively grouped in each group design groove, and a non-return The joints are assembled in the circumferential wall of the shaft seat. A flow channel that can communicate with the perforation is formed inside the non-return joint. A tapered hole is formed in the flow channel. A tapered surface corresponding to the shape of the tapered hole is formed at the tapered hole, and the anti-reverse part is pushed by an elastic part to close the flow channel, and a hollow ring-shaped metal is pierced in the through hole of the shaft seat. Thin ring, the outer diameter of the thin metal ring is smaller than the inner diameter of the perforation, so that a chamber for filling hydraulic oil is formed between the thin metal ring and the ring wall of the perforation.
Description
本發明與動力傳遞機構有關,特別是指一種聯軸器裝置。 The invention relates to a power transmission mechanism, in particular to a coupling device.
按,聯軸器為機構傳動領域中常見的動力傳遞元件,其主要用以連結二個機械裝置的轉軸,使被連接的轉軸能夠精確的傳遞扭矩。 Press, the coupling is a common power transmission element in the field of mechanism transmission, which is mainly used to connect the shafts of two mechanical devices, so that the connected shafts can transmit torque accurately.
然而一般聯軸器在隨主軸高速旋動時,若其轉動慣量不平衡,容易在離心力之作用下,因重心偏移而產生振動,使整體運作旋轉有不平穩之情況發生,進而會有轉軸傳遞扭矩之能量過度損失、轉軸之壽命縮短、加工精度降低等問題,且隨轉軸轉動時更容易因共振而產生噪音,種種衍生的問題皆不利於高速機型的應用。此外,一般聯軸器大多是藉由斜錐設計再利用旋鎖迫緊的方式來固定外部軸心,不但要耗費很多的時間在聯軸器的安裝與校正上,且以此固定方式並無法使外部軸心可被均勻受力夾持,導致外部軸心容易損壞而使配合之精密度降低。 However, when the general coupling rotates with the main shaft at high speed, if its moment of inertia is unbalanced, it is easy to vibrate due to the shift of the center of gravity under the action of centrifugal force, making the overall operation and rotation unstable, and there will be a shaft Excessive loss of energy for torque transmission, shortened life of the shaft, reduced machining accuracy, etc., and it is easier to generate noise due to resonance when rotating with the shaft, and all kinds of derived problems are not conducive to the application of high-speed models. In addition, most of the general couplings use the oblique cone design and then use the screw lock method to fix the external axis. The outer axis can be clamped by uniform force, which will cause the outer axis to be easily damaged and reduce the precision of fit.
有鑒於此,故如何解決上述問題,即為本發明所欲解決之主要課題,因此本案發明人秉持精益求精之精神,經過不斷的苦思與試做後,才終於有本發明之產生。 In view of this, how to solve the above-mentioned problems is the main problem to be solved by the present invention. Therefore, the inventor of this case adheres to the spirit of keeping improving, and finally has the generation of the present invention after continuous hard thinking and trial work.
本發明之主要目的,在於提供一種聯軸器裝置,其具有可均勻、穩固夾持外部軸心之效果,以及有利於執行線上動平衡校正工作之功效。 The main purpose of the present invention is to provide a coupling device, which has the effect of uniformly and stably clamping the external shaft center, and is beneficial to perform online dynamic balance correction work.
為達前述之目的,本發明提供一種聯軸器裝置,包含有: 一呈圓柱狀之軸座,具有一沿其軸向貫穿軸座兩端的穿孔,該軸座之環周壁上開設有分別連通該穿孔之一注油通道與一排氣通道,並於該軸座之一端外凸形成有數個凸部,該軸座於鄰近該各凸部之環周壁上徑向開設有數個呈等角間隔設置且分別朝該軸座之軸心延伸的組設槽,且該各組設槽中分別組設有一配重塊;一止逆接頭,組設於該注油通道中,該止逆接頭具有一朝向該穿孔之第一端、及一與該第一端相反的第二端,並於該止逆接頭之內部形成有一貫穿該第一端與該第二端之流道,該流道於靠近該第一端處形成有一大徑孔,該流道於靠近該第二端處形成有一小徑孔,該大徑孔與該小徑孔之間連接有一朝該小徑孔漸縮之錐形孔,而一止逆件穿設於流道中,該止逆件於相對該錐形孔處形成有一與該錐形孔之形狀相對應之斜錐面,且該止逆件於朝向該穿孔之一端上套設有一彈性件,該彈性件之兩端分別彈抵於該止逆件與該止逆接頭面向該穿孔之一側壁上;以及 一套接件,呈中空環狀,該套接件具有一金屬薄環,該套接件以其金屬薄環穿設於該穿孔中,該金屬薄環之外徑小於該穿孔之內徑,使該金屬薄環與該穿孔之環壁間形成有一供填注液壓油之容室。 In order to achieve the aforementioned purpose, the present invention provides a coupling device, comprising: A cylindrical shaft seat has a perforation through the two ends of the shaft seat along its axial direction. An oil injection channel and an exhaust channel respectively communicating with the through hole are opened on the peripheral wall of the shaft seat, and on the shaft seat One end protrudes outwards to form several protrusions, and the shaft seat is radially provided with several assembly grooves arranged at equiangular intervals and extending toward the axis center of the shaft seat on the circumferential wall adjacent to each protrusion, and each of the A counterweight is respectively assembled in the assembly groove; a non-return joint is assembled in the oil injection channel, and the non-return joint has a first end facing the through hole and a second end opposite to the first end. end, and a flow channel is formed inside the non-return joint through the first end and the second end, the flow channel is formed with a large diameter hole near the first end, and the flow channel is near the second end A small-diameter hole is formed at the end, and a tapered hole that tapers toward the small-diameter hole is connected between the large-diameter hole and the small-diameter hole. An oblique conical surface corresponding to the shape of the tapered hole is formed at the tapered hole, and an elastic member is sleeved on the end of the non-return member facing the through hole, and the two ends of the elastic member respectively bounce against the The non-return member and the non-return joint are on a side wall facing the through hole; and A socket is in the shape of a hollow ring. The socket has a thin metal ring. The metal thin ring of the socket is passed through the through hole. The outer diameter of the metal thin ring is smaller than the inner diameter of the through hole. A chamber for filling hydraulic oil is formed between the metal thin ring and the ring wall of the perforation.
較佳地,該各組設槽之開設深度與該環周壁之壁厚的比值介於0.85至0.95。 Preferably, the ratio of the depth of each set of grooves to the thickness of the peripheral wall is between 0.85 and 0.95.
較佳地,該各組設槽之內周壁分別設有一內螺紋段,而各該配重塊之外周緣設有與該內螺紋段相對應的外螺紋段,各該配重塊分別螺接組設於相對應之組設槽中,並在各該配重塊朝向該環周壁之端面上分別凹設有一嵌槽。且進一步地,該各組設槽之開口處分別組設有一與該環周壁相切齊之蓋體,藉以將該配重塊封閉於相對應之組設槽中。 Preferably, the inner peripheral walls of each set of grooves are respectively provided with an internal thread section, and the outer peripheral edge of each of the counterweights is provided with an external thread section corresponding to the internal thread section, and each of the counterweights is screwed The assembly is arranged in the corresponding assembly groove, and an embedding groove is recessed on the end face of each counterweight facing the peripheral wall. Furthermore, the openings of the respective assembly grooves are respectively provided with a cover which is tangent to the peripheral wall, so as to seal the counterweight in the corresponding assembly grooves.
較佳地,在該注油通道朝外之開口處組設有一與該環周壁相切齊之封蓋,以封閉該注油通道與該止逆接頭。 Preferably, a cover that is tangent to the circumferential wall is assembled at the outward opening of the oil injection channel to close the oil injection channel and the non-return joint.
較佳地,該止逆接頭用以供一注油嘴相接,該注油嘴具有一與該止逆接頭相接的注油口,並於該注油口中設有一銜接件,該銜接件具有一用以固接於該注油口中之基座,該銜接件呈中空環狀圈圍形成有一通道,且該基座於朝向該止逆接頭之一側凸伸有數個爪塊,該各爪塊環繞該通道且彼此間以一間隙呈間隔設置,且該注油嘴以其注油口相對套設於該止逆接頭時,該各爪塊將相對夾掣於該止逆接頭之外周上。 Preferably, the non-return joint is used to connect with a grease nozzle, and the grease nozzle has an oil injection port connected with the non-return joint, and an adapter is provided in the oil injection port, and the adapter has a The base fixed in the oil filling port, the connecting piece forms a channel in the form of a hollow ring, and the base protrudes from the side facing the non-return joint with several claws, each of which surrounds the channel And they are arranged at intervals with a gap, and when the oil injection nipple is relatively sleeved on the non-return joint with its oil injection port, the claw blocks will be relatively clamped on the outer circumference of the non-return joint.
較佳地,該穿孔之一端外擴形成有一定位槽,而該套接件之一端具有一用以對應置入該定位槽並固定之定位環,該定位環朝該軸座之穿孔內延伸形成有該金屬薄環,該金屬薄環供圈束定位一由外部置入之外部軸心,並於該金屬薄環之內壁上凹設有一螺旋溝槽。 Preferably, one end of the through hole expands to form a positioning groove, and one end of the sleeve has a positioning ring for correspondingly inserting into the positioning groove and fixing, and the positioning ring extends toward the through hole of the shaft seat to form a There is the thin metal ring, and the thin metal ring is used for the positioning of the ring beam, an external shaft center inserted from the outside, and a spiral groove is recessed on the inner wall of the thin metal ring.
而本發明之上述目的與優點,不難從下述所選用實施例之詳細說明與附圖中獲得深入了解。 The above objects and advantages of the present invention can be easily understood from the detailed description of the following selected embodiments and the accompanying drawings.
11:軸座 11: shaft seat
12:穿孔 12: Perforation
121:定位槽 121: positioning slot
13:環周壁 13: Circumferential wall
14:注油通道 14: Oil injection channel
141:封蓋 141: capping
15:排氣通道 15: exhaust channel
151:密封件 151: seal
152:抵置件 152: arrival part
16:凸部 16: convex part
17:組設槽 17: Assembly slot
171:內螺紋段 171: internal thread segment
18:配重塊 18: Counterweight
181:嵌槽 181: slotting
182:外螺紋段 182: external thread segment
19:蓋體 19: cover body
D:開設深度 D: opening depth
L:壁厚 L: wall thickness
21:止逆接頭 21: Check connector
211:側壁 211: side wall
22:第一端 22: first end
23:第二端 23: Second end
24:流道 24: Runner
25:大徑孔 25: large diameter hole
26:小徑孔 26: small diameter hole
27:錐形孔 27: tapered hole
28:止逆件 28: Backstop
281:斜錐面 281: oblique cone
29:彈性件 29: Elastic parts
31:套接件 31: Socket
32:定位環 32: positioning ring
33:金屬薄環 33: metal thin ring
331:螺旋溝槽 331: spiral groove
34:容室 34: Containment room
41:注油嘴 41:Grease nozzle
42:注油口 42: Oil filling port
43:銜接件 43: Connector
431:基座 431: base
44:通道 44: channel
432:爪塊 432: claw block
51:連接件 51: Connector
第1圖為本發明之分解示意圖。 Figure 1 is an exploded view of the present invention.
第2圖為本發明之軸向剖面示意圖。 Fig. 2 is an axial sectional view of the present invention.
第3圖為本發明組設噴油嘴時之軸向剖面示意圖。 Fig. 3 is a schematic axial cross-sectional view of the present invention when the fuel injector is assembled.
第4圖為本發明噴油嘴之結構示意圖。 Figure 4 is a schematic structural view of the fuel injector of the present invention.
第5圖為本發明組設噴油嘴時之使用狀態示意圖(一)。 Figure 5 is a schematic diagram of the use state when the fuel injector is assembled according to the present invention (1).
第6圖為本發明組設噴油嘴時之使用狀態示意圖(二)。 Figure 6 is a schematic diagram of the use state when the fuel injector is assembled according to the present invention (2).
第7圖為本發明於注油通道組設封蓋時之結構示意圖。 Fig. 7 is a schematic diagram of the structure of the present invention when the oil injection channel is assembled with a cover.
首先,請參閱第1、2圖所示,為本發明所提供之聯軸器裝置,其主要由一軸座11、一止逆接頭21及一套接件31所組成,其中:
First of all, please refer to Figures 1 and 2, the coupling device provided by the present invention is mainly composed of a
該軸座11,呈中空圓柱狀,該軸座11於其軸心位置具有一沿其軸向貫穿軸座11兩端的穿孔12,並於該穿孔12之一端外擴形成有一定位槽121,且該軸座11之環周壁13上開設有分別連通該穿孔12之一注油通道14與一排氣通道15,而該軸座11之一端外凸形成有數個凸部16,該軸座11於鄰近該各凸部16之環周壁13上徑向開設有8~12個呈等角間隔設置且分別朝該軸座11之軸心延伸的組設槽17,且該各組設槽17中分別組設有一配重塊18。而於本實施例中,係於該軸座11之環周壁13上開設有12個呈等角(即30度)間隔設置的組設槽17,較佳地,組設槽17之開設深度D與環周壁13之壁厚L的比值介於0.85至0.95,並於各組設槽17之內周壁分別設有一內螺紋段171,各該配重塊18係由塑料材質製成,且各該配重塊18於朝向該環周壁13之端面上分別凹設有一可供鎖設工具(例如螺絲起子或扳手)卡設組接之嵌槽181,各該配重塊18之外周緣設有與該內螺紋段171相對應的外螺紋段182,該各配重塊18分別經由相對應組設槽17之開口端螺接組設於組設槽17中,且透過旋鎖配重塊18即可調整各配重塊18之螺接位置,並在該各組設槽17之開口處分別組設有一與該環周壁13相切齊之蓋體19,藉以將該配重塊18封閉於相對應之組設槽17中,且進一步地,該配重塊18之重量大於該蓋體19之重量。
The
該止逆接頭21,組設於該注油通道14中,該止逆接頭21具有一朝向該穿孔12之第一端22、及一與該第一端22相反的第二端23,並於該止逆接頭21之內部形成有一貫穿該第一端22與該第二端23之流道24,該流道24於靠近該第一端22處形成有一大徑孔25,該流道24於靠近該第二端23處形成有一小徑孔26,該大徑孔25與該小徑孔26之間連接有一朝該小徑孔26漸縮之錐形孔27,而一止逆件28
穿設於該流道24中,該止逆件28於相對該錐形孔27處形成有一與該錐形孔27之形狀相對應之斜錐面281,且該止逆件28於朝向該穿孔12之一端上套設有一彈性件29,該彈性件29之兩端分別彈抵於該止逆件28與該止逆接頭21面向該穿孔12之一側壁211上。而如第3、4圖所示,該止逆接頭21用以供與外部之一注油嘴41相接,使液壓油可經該止逆接頭21注入於該軸座11內部,其中,該注油嘴41具有一與該止逆接頭21相接的注油口42,並於該注油口42中設有一銜接件43,該銜接件43具有一用以固接於該注油口42中之基座431,該銜接件43呈中空環狀圈圍形成有一通道44,且該基座431於朝向該止逆接頭21之一側凸伸有數個爪塊432,該各爪塊432環繞該通道44且彼此間以一間隙呈間隔設置,藉由該等間隙使該各爪塊432於受力後可產生微幅張合之變形,且該注油嘴41以其注油口42相對套設於該止逆接頭21上時,該各爪塊432將受該止逆接頭21之外周推擠而略為外擴,並透過該各爪塊432本身之彈性回復力而穩固夾掣於該止逆接頭21上,如此一來,即可無須以旋鎖方式鎖固組設該注油嘴41,使該注油嘴41之組設工作可更為簡單、快速。
The non-return joint 21 is assembled in the
該套接件31,呈中空環狀,該套接件31之一端具有一供對應置入該定位槽121並固定之定位環32,該定位環32朝該軸座11穿孔12內延伸形成有一金屬薄環33,該金屬薄環33用以供圈束定位一由外部置入之外部軸心(圖中未示),該金屬薄環33可於受壓後略為內縮變形,且該金屬薄環33之外徑略小於該穿孔12,使該金屬薄環33與穿孔12之環壁間形成一供填滿液壓油之容室34。於本實施例中,該套接件31與軸座11相接的位置處係以焊接固定密封。
The
此外,如第1圖所示,本發明所提供之聯軸器裝置於使用時係具有二個分別與外部軸心結合之軸座11,並於二軸座11之間夾持一連接件51,俾供連結不同之外部軸心來同軸傳動。
In addition, as shown in Figure 1, the coupling device provided by the present invention has two
而如第5、6圖,本發明所提供之聯軸器裝置於使用時,使用者僅需以該注油嘴41之注油口42直接套接於該止逆接頭21上,接著當以一注油機(圖中
未示)供應液壓油至該注油嘴41時,液壓油會推開流道24中的止逆件28,使其斜錐面281與錐形孔27間形成有可供液壓油流過之空間,而液壓油並從此處流經大徑孔25、注油通道14而注入至該容室34中,並且,在容室34持續注入液壓油之過程中,容室34中會產生一定之壓力,且因為液壓油係於容室34中環繞著金屬薄環33,故此壓力會均勻的施加於金屬薄環33之外周上,並令金屬薄環33產生些微內縮之形變,進而使穿設於金屬薄環33內的外部軸心,可受到內縮之金屬薄環33圈束固定,其中並因液壓油係均勻施力予金屬薄環33,故連帶使得受金屬薄環33所夾持圈束之外部軸心產生均勻受力之穩固夾持效果。此外,搭配參閱第6圖所示,該排氣通道15之一端係與該容室34連通,另一端則與外部連通,該排氣通道15係為當容室34注入液壓油時,藉以排出容室34之空氣,且當容室34之空氣排出後,該排氣通道15於連通外部之一端設置密封容室34之密封件151,該排氣通道15與密封件151間設有一抵置件152,且抵置件152係受密封件151抵壓而定位並密封該排氣通道15,使排氣通道15完全密封。
And as shown in Figures 5 and 6, when the coupling device provided by the present invention is in use, the user only needs to directly socket the oil injection port 42 of the oil injection nozzle 41 on the non-return joint 21, and then use an oil injection machine (in the figure
(not shown) When hydraulic oil is supplied to the oil injection nozzle 41, the hydraulic oil will push away the non-return member 28 in the flow channel 24, so that a space for the hydraulic oil to flow is formed between the inclined tapered surface 281 and the tapered hole 27 , and the hydraulic oil flows from here through the large-diameter hole 25 and the oil injection channel 14 and is injected into the chamber 34, and, in the process of continuously injecting hydraulic oil into the chamber 34, a certain pressure will be generated in the chamber 34, And because the hydraulic oil system surrounds the thin metal ring 33 in the chamber 34, the pressure will be evenly applied to the outer circumference of the thin metal ring 33, and the thin metal ring 33 will be deformed slightly inward, and then the thin metal ring 33 will be slightly retracted, so that the thin metal ring 33 that passes through The outer shaft center in the thin metal ring 33 can be fixed by the thin metal ring 33 that shrinks inwardly, and because the hydraulic oil system uniformly applies force to the thin metal ring 33, it is also made to be clamped by the thin metal ring 33. The outer axis produces a stable clamping effect with uniform force. In addition, as shown in FIG. 6, one end of the
接著如第7圖所示,當容室34中液壓油之壓力達到一定之程度時,透過位在大徑孔25處之彈性件29之彈力而推頂該止逆件28復位,令止逆件28之斜錐面281再次抵緊於錐形孔27之壁上,此時,即可將注油嘴拆下,並在該注油通道14朝外之開口處組設有一與該環周壁13相切齊之封蓋141,藉以封閉該注油通道14與該止逆接頭21,而可避免因該止逆接頭21外露而導致該軸座11於轉動時產生風切之問題。
Next, as shown in Figure 7, when the pressure of the hydraulic oil in the
且進一步搭配參閱第2圖所示,該金屬薄環33之內壁上凹設有一沿其軸向延伸之螺旋溝槽331,於該金屬薄環33徑向內縮變形時,該螺旋溝槽331更可使該金屬薄環33於油壓作動而受力變形時,平均往徑向軸心移動,使金屬薄環33內壁平均夾持於外部軸心上,以確保外部軸心不致磨損或損壞而影響配合之精密度。
And further matching is shown in Figure 2, the inner wall of the
此外,本發明之聯軸器裝置進一步在其軸座11之組設槽17中分別組設有配重塊18,因此當使用者透過動平衡量測儀進行頻譜分析後,僅須透過旋鎖調整各配重塊18之螺接位置,即可用以改變該軸座11之轉動慣量,並可因應各種不同之情況進行個別的調整,進而實現動平衡之校正工作,且在調整各配重塊18時更可搭配塗佈密封膠,以定位各配重塊18調整後之位置,使動平衡校正工作可更為簡單、快速,而有利於本發明所提供之聯軸器裝置安裝於工作位置後執行線上動平衡之校正工作;再者,本發明在該各組設槽17之開口處分別組設有一與該環周壁13相切齊之蓋體19,更可有效避免本發明所提供之聯軸器裝置於轉動時產生風切之問題,且透過該配重塊18之重量大於該蓋體19之重量之設定,更可確保其轉動之平穩性。
In addition, the coupling device of the present invention is further equipped with
惟,以上各實施例之揭示僅用以說明本發明,並非用以限制本發明,故舉凡數值之變更或等效元件之置換仍應隸屬本發明之範疇。 However, the disclosures of the above embodiments are only used to illustrate the present invention, not to limit the present invention, so any changes in numerical values or replacement of equivalent elements should still fall within the scope of the present invention.
綜上所述,當可使熟知本項技藝者明瞭本發明確可達成前述目的,實已符合專利法之規定,故依法提出申請。 To sum up, when it can make those who are familiar with this technology understand that the present invention can clearly achieve the above-mentioned purpose, it actually complies with the provisions of the Patent Law, so the application is filed according to the law.
11:軸座 11: shaft seat
12:穿孔 12: Perforation
121:定位槽 121: positioning slot
13:環周壁 13: Circumferential wall
14:注油通道 14: Oil injection channel
15:排氣通道 15: exhaust channel
16:凸部 16: convex part
17:組設槽 17: Assembly slot
18:配重塊 18: Counterweight
181:嵌槽 181: slotting
19:蓋體 19: cover body
21:止逆接頭 21: Check connector
31:套接件 31: Socket
32:定位環 32: positioning ring
33:金屬薄環 33: metal thin ring
331:螺旋溝槽 331: spiral groove
51:連接件 51: Connector
Claims (6)
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TW110124987A TWI803900B (en) | 2021-07-07 | 2021-07-07 | Coupling device |
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TW110124987A TWI803900B (en) | 2021-07-07 | 2021-07-07 | Coupling device |
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TWI803900B true TWI803900B (en) | 2023-06-01 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485673A1 (en) * | 1980-06-26 | 1981-12-31 | Castens Rudolf | DEVICE FOR TRANSMITTING A TORQUE OF A TURNING ELEMENT AROUND A ROTATION AXIS TO A ROTATING ELEMENT |
CN201925360U (en) * | 2011-01-19 | 2011-08-10 | 盈锡精密工业股份有限公司 | Balance structure of locking precision nut |
TWI390135B (en) * | 2010-01-06 | 2013-03-21 |
-
2021
- 2021-07-07 TW TW110124987A patent/TWI803900B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485673A1 (en) * | 1980-06-26 | 1981-12-31 | Castens Rudolf | DEVICE FOR TRANSMITTING A TORQUE OF A TURNING ELEMENT AROUND A ROTATION AXIS TO A ROTATING ELEMENT |
TWI390135B (en) * | 2010-01-06 | 2013-03-21 | ||
CN201925360U (en) * | 2011-01-19 | 2011-08-10 | 盈锡精密工业股份有限公司 | Balance structure of locking precision nut |
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