201226743 六、發明說明： 【發明所屬之技術領域】 本發明係一種線性傳動元件的防塵配件，尤指針 對螺帽所設置的防塵裝置做結構上的精進。 【先前技術】 按，精密機械、儀器中常使用一螺桿的轉動帶動 一螺帽的移動，該螺帽上並提供一工作檯的設置，以 此利用螺桿達到工作檯的精確控制，而螺帽於螺桿上 移動時，為了增加移動的順暢、增加附載與減少磨擦 力，均會於螺帽及螺桿間的相對螺紋槽設置滾珠，而 螺帽於螺桿上，同時間僅一小段的接觸，多數其餘的 螺桿段，均是暴露於外部空間中，而空間内佈滿了粉 塵與各種異物，尤其多數的加工場所，環境更是惡 劣，還有許多切削屑與加工油水的喷濺，該螺帽與該 螺桿間並非密閉，因均為金屬構件，因此具有一間隙 的存在，當這些粉塵、異物與切削屑落在螺桿表面 時，會附著於螺桿表面，尤其含有油水時，該些附著 物的附著累積更是驚人，且隨著螺桿的轉動與螺帽的 移動，該些附著物並會由間隙進入螺桿與螺帽間到達 滾珠處，進而會干涉滾珠的滚動與滾珠的磨耗，最終 會影響該滾珠螺桿的壽命與精度，因此如何消除該間 隙的存在，防止附著物進入滾珠螺桿内，便有許多結 201226743 構的設計因應而生，其中最常見的結構即係第一、二 圖的設計，係一螺桿60上設一螺帽70，該螺桿60 與該螺帽70間並各設有一螺紋槽61，71，複數滚珠 80係設於該螺紋槽61，71中循環滚動，且該螺帽70 的端部内徑處設有一容置槽72，以該容置槽72提供 一防塵裝置90的設置，且配合複數的螺絲900鎖設， 該防塵裝置90係設於該容置槽72内，且内周緣設有 配合該螺桿60螺紋槽61形狀的刮刷部91，該到刷 部91並配合該螺紋槽61以幾乎貼合的方式設置，使 該螺帽70及該防塵裝置90於螺桿60上移動時，以 該刮刷部91將該螺桿60上的附著物刮除，俾避免進 入該螺帽70内，而該刮刷部91係為消耗品，因此必 須能夠更換，該係於容置槽72的周緣設置複數貫穿 螺孔73，以該貫穿螺孔73提供該螺絲900鎖設，而 該防塵裝置90周緣的對應位置並設有一卡溝槽92， 該螺絲900的鎖設係進入該卡溝槽92内。 前述習知結構使用具有下述的缺失： 1.該防塵裝置90組裝於該螺帽70 —端的位置時， 必須以該卡溝槽92對正該貫穿螺孔73,再以該螺 絲900鎖設，而螺絲900係以徑方向Y方式鎖設， 而此種鎖設方式其各螺絲900鎖固的鬆緊無法一 致，當螺絲900鎖設過緊，會造成該防塵裝置90 201226743 受到擠壓變形，而使該刮刷部91對該螺桿60表 面產生假性預壓（亦即該刮刷部91與螺桿60表面 接觸力道過大），此會造成防塵裝置90的壽命減 短，且會影響該螺帽70的移動順暢度，而螺絲900 鎖設過鬆時，則會造成滚珠螺桿運行時，該防塵 裝置90容易脫落，進而失去除塵的功效。 2.再者，因該防塵裝置90組裝於該螺帽70 —端的 • 位置固定，必須以該卡溝槽92對正該貫穿螺孔 73，再以該螺絲900鎖設，無法調整該防塵裝置 90軸向位置，因此必須以旋轉方式進行繁鎖的對 牙工作，具組裝不方便，且對牙不正確時，更會 造成該刮刷部91又對該螺桿60表面產生假性預 壓。 【發明内容】 ® 基於上述習知技術之問題點，本發明人經過研究 改良後，終有確能達成以下發明之目的之發明誕生。 即，本發明首要目的在於，提供一種易組裝且不 會因為螺絲鎖的太緊或太鬆，而造成防塵裝置與螺桿 產生假性預壓或鬆動的問題產生。 為達上述之目的，本發明係為一種具防塵裝置之 滾珠螺桿，係包含： 201226743 一長軸，係為長條狀之結構，該長轴外緣面係設 有螺旋狀之滾動溝； 一螺帽組件’包含：一螺帽、至少一迴流通道， 該螺帽具有一供該長軸穿設之容置孔，該容置孔之内 緣面分別設有螺旋狀之滾動槽，及兩個螺旋狀之内螺 牙，該滾動槽係相對該滾動溝設置，且該滾動溝與滾 動槽係構成一負荷路徑，該負荷路徑係與該迴流通道 構成一循環路徑，該内螺牙係分別設置於該容置孔的 兩端部； 複數滚動體，係容設於該循環路徑； 兩防塵裝置，其具有一供該長軸穿設之通孔，該 通孔之内緣面係設有朝該滾動溝凸伸且與該滾動溝 接觸之唇部’該防塵裝置之外緣面係設有與該螺帽之 内螺牙相對之外螺牙’該螺帽之内螺牙係與該防塵裝 置之外螺牙相互螺合’使該防塵裝置固定於該螺帽之 容置孔兩端。 為了使該防塵裝置定位效果更佳，可於該螺帽之 端面與該防塵裝置之端面分別設有一定位孔及對位 孔’藉由一設有兩凸柱之固定塊’以兩該凸故分別穿 設於該定位孔及對位孔中，以限制該防塵裝晉 I <旋轉 自由度》 201226743 為了更進一步瞭解本發明之特徵及技術内容，請 參閱以下有關本發明之實施方式說明及圖式，然而此 實施方式及圖式僅供說明及參考用，而非用以對本發 明做任何限制者。 【實施方式】 以下茲配合圖式列舉一較佳實施例，用以對本發明之 組成構件及功效作進一步說明，其中各圖式之簡要說明如 下： 圖三係為本發明具防塵裝置之滾珠螺桿之系統 圖。 圖四係為本發明具防塵裝置之滾珠螺桿之組合 圖。 圖五係為本發明具防塵裝置之滚珠螺桿剖視 圖，防塵裝置之唇部係與長軸之滾動溝干涉。 圖六係為本發明具防塵裝置之滾珠螺桿端視圖。 圖七係為本發明具防塵裝置之滚珠螺桿剖視 圖，旋轉防塵裝置後，唇部係與長軸之滾動溝之間具 有間隙。 請參閱圖三至圖七所示，係為本發明一較佳實施 例，本發明係為一種具防塵裝置之滾珠螺桿，係包含： 一長軸1，係為長條狀之結構，該長軸1外緣面 係設有螺旋狀之滾動溝11 ; 201226743 一螺帽組件，包含：一螺帽2、至少一迴流通道 (未顯示），該螺帽2具有一供該長軸1穿設之容置孔 21，該容置孔21之内緣面分別設有螺旋狀之滾動槽 211，及兩個螺旋狀之内螺牙212，該滚動槽211係 相對該滾動溝11設置，且該滚動溝11與滾動槽211 係構成一負荷路徑，該負荷路徑係與該迴流通道構成 一循環路徑（於本實施例所列舉的迴流元件3係分別 設置於該容置孔21兩端，而該迴流元件3係具有一 迴流道31，而螺帽2係設有一軸方向且貫穿該螺帽2 之兩端面的迴流孔23，該迴流道31之兩端係分別銜 接該負荷路徑及該迴流孔23,故本實施例所舉的迴 流通道係由兩迴流道31及一迴流孔23所構成。但亦 有迴流元件之迴流道的兩端直接與該負荷路徑銜 接，而形成該循環路徑，故該迴流通道只由該迴流道 所構成。因為本發明所主張的特徵為防塵裝置，故對 於滾珠螺桿的循環方式不多作贅述，如為單純循環方 式的置換而防塵裝置的結構與本發明相同，則亦為本 發明所主張的範圍。），該内螺牙212係分別設置於 該容置孔21的兩端部； 複數滚動體6，係容設於該循環路徑； 兩防塵裝置4，其具有一供該長軸1穿設之通孔 41，該通孔41之内緣面係設有朝該滚動溝11凸伸之 201226743 唇部411，該防塵裝置4之外緣面係設有與該内螺牙 212相對之外螺牙42，該内螺牙212係與該外螺牙 42相互螺合，使該防塵裝置4固定於該容置孔21兩 端。為了使該防塵裝置4定位效果更佳，可於該螺帽 2之端面與該防塵裝置4之端面分別設有一定位孔22 及對位孔43，再藉由一固定塊5所設之凸柱51分別 穿設於該定位孔22及對位孔43中，以限制該防塵裝 _ 置4之旋轉自由度R。 再者，請參閱圖五至圖七所示，係說明該防塵裝 置4之安裝方式，首先將該防塵裝置4之外螺牙42 與該螺帽2之内螺牙212螺合後，使防塵裝置4能穩 固地設置於該螺帽2的容置孔21，然後裝配者需轉 動滾珠螺桿，比較該滾珠螺桿裝設防塵裝置4後的旋 轉順暢度，與未裝設該防塵裝置4的旋轉順暢度是否 φ 有差異，如果較為不順暢，則就是該防塵裝置4的唇 部411與滚動溝11產生過度干涉，如圖五元件符號 X為干涉處，此時，只需轉動該防塵裝置4,來調整 該唇部411與滚動溝11的干涉量或者保留一微小間 隙Η，如圖七所示，如此皆可以達到防止異物進入容 置孔21的效果，相對才能讓滾珠螺桿旋轉的更為順 暢，調整完後再將該固定塊5之凸柱51插設於該定 位孔22及對位孔43，以限制該防塵裝置4的旋轉自 201226743 由度R。 為求清楚說明本發明之實施特點，以下說明本發 明較習用進步之處及實用方式： 該防塵裝置4藉由其外螺牙與螺帽之内螺牙的配 合，使其能固定於該螺帽上，使該唇部411容設或抵 觸於該滾動溝11，相對的該防塵裝置4因為藉由該外 螺牙與螺帽之内螺牙的配合，故不會施以該防塵裝置 4一徑方向的鎖固力量（如習知技術為徑方向鎖固）， 相對也不會讓該防塵裝置4之内緣面（唇部411)對於 該長軸1產生假性預壓力（亦即過度干涉），是以， 本創作已完全解決改善習知技術所產生的問題，使防 塵裝置於裝配時更為快速且延長該防塵裝置的使用 壽命。 综所上述，所以本發明之『具有產業之可利用性』 應已毋庸置疑，除此之外，在本案實施例所揭露出的 特徵技術，於申請之前並未曾見於諸刊物，亦未曾被 公開使用，不但具有如上所述功效增進之事實，更具 有不可輕忽的附加功效，是故，本發明的『新穎性』 以及『進步性』都已符合專利法規，爰依法提出發明 專利之申請，祈請惠予審查並早日賜准專利，實感德 201226743 以上所述實施例之揭示係用以說明本發明，並非 用以限制本發明，故舉凡數值之變化與等效元件之置 換，仍應隸屬本發明之範疇。201226743 VI. Description of the Invention: [Technical Field] The present invention relates to a dustproof fitting for a linear transmission component, and particularly to a structurally advanced dustproof device provided for a nut. [Prior Art] According to the precision machinery and equipment, the rotation of a screw is often used to drive the movement of a nut. The nut is provided with a table setting, so that the screw can be used to achieve precise control of the table, and the nut is When moving on the screw, in order to increase the smoothness of movement, increase the load and reduce the friction force, the balls are arranged on the opposite thread grooves between the nut and the screw, and the nut is on the screw, and only a short contact is made at the same time, most of the rest The screw segments are exposed to the external space, and the space is covered with dust and various foreign objects, especially in most processing places, the environment is even worse, and there are many sprinkles and processing oil splashes, the nut and The screw is not sealed, because it is a metal member, so there is a gap. When the dust, foreign matter and cutting chips fall on the surface of the screw, they will adhere to the surface of the screw, especially when oil and water are contained. The accumulation is even more amazing, and as the screw rotates and the nut moves, the attachments will enter the ball between the screw and the nut through the gap. It will interfere with the rolling of the ball and the wear of the ball, which will eventually affect the life and accuracy of the ball screw. Therefore, how to eliminate the existence of the gap and prevent the attachment from entering the ball screw, there are many designs of the 201226743 structure. The most common structure is the first and second drawings. A screw 70 is disposed on a screw 60. The screw 60 and the nut 70 are respectively provided with a thread groove 61, 71, and a plurality of balls 80 series. The threaded groove 61, 71 is circulated and rolled, and an inner end of the nut 70 is provided with a receiving groove 72. The receiving groove 72 provides a dustproof device 90 and is matched with a plurality of screws 900. The dust-proof device 90 is disposed in the accommodating groove 72, and the inner peripheral edge is provided with a wiping portion 91 that matches the shape of the screw groove 61 of the screw 60. The brush portion 91 is matched with the screw groove 61 to be almost attached. When the nut 70 and the dustproof device 90 are moved on the screw 60, the attachment portion of the screw 60 is scraped off by the wiping portion 91 to avoid entering the nut 70. The wiping portion 91 is a consumable item, so it must be replaceable. A plurality of through-holes 73 are provided in the periphery of the receiving groove 72, and the screw 900 is provided with the screw 900. The corresponding position of the periphery of the dust-proof device 90 is provided with a card groove 92, and the screw 900 is locked. It enters the card slot 92. The prior art structure has the following drawbacks: 1. When the dustproof device 90 is assembled at the end of the nut 70, the through hole 73 must be aligned with the card groove 92, and then locked by the screw 900. The screw 900 is locked in the radial direction Y mode, and the locking manner of the screws 900 can not be consistently locked. When the screw 900 is locked too tight, the dustproof device 90 201226743 is subjected to crush deformation. Therefore, the wiping portion 91 generates a pseudo preload on the surface of the screw 60 (that is, the surface contact force between the wiping portion 91 and the screw 60 is too large), which causes the life of the dustproof device 90 to be shortened, and the snail is affected. When the cap 70 is moved smoothly, and the screw 900 is loosely locked, the dustproof device 90 is easily detached when the ball screw is operated, and the dust is removed. 2. In addition, since the dustproof device 90 is fixed at the end of the nut 70, the through hole 73 must be aligned with the through hole 91, and the screw 900 is locked, and the dustproof device cannot be adjusted. The axial position of the 90 is so that the complicated tooth working must be performed in a rotating manner, which is inconvenient to assemble, and when the tooth is incorrect, the wiping portion 91 causes a false preload on the surface of the screw 60. SUMMARY OF THE INVENTION ® Based on the problems of the above-mentioned conventional techniques, the inventors of the present invention have succeeded in research and development, and the invention which can achieve the object of the following invention is born. That is, the primary object of the present invention is to provide a problem that is easy to assemble and does not cause a false preload or looseness of the dustproof device and the screw because the screw lock is too tight or too loose. In order to achieve the above object, the present invention is a ball screw with a dustproof device, comprising: 201226743 a long shaft, which is a long strip structure, the long shaft outer edge surface is provided with a spiral rolling groove; The nut assembly includes: a nut, at least one return passage, the nut has a receiving hole for the long shaft, and the inner edge surface of the receiving hole is respectively provided with a spiral rolling groove, and two a spiral inner screw, the rolling groove is disposed with respect to the rolling groove, and the rolling groove and the rolling groove form a load path, and the load path and the return channel form a circulation path, and the internal thread system respectively Provided at both ends of the accommodating hole; a plurality of rolling elements are disposed in the circulation path; and two dustproof devices have a through hole through which the long shaft is bored, and an inner edge surface of the through hole is provided a lip portion that protrudes toward the rolling groove and contacts the rolling groove. The outer surface of the dustproof device is provided with a screw thread opposite to the inner thread of the nut. The screw is screwed to the outside of the dustproof device to fix the dustproof device Both ends of the nut accommodating hole. In order to improve the positioning effect of the dustproof device, a positioning hole and a matching hole 'of a fixing block provided with two protrusions' are respectively disposed on the end surface of the nut and the end surface of the dustproof device. Separately disposed in the positioning hole and the alignment hole to limit the dustproof assembly I < rotational freedom. 201226743 In order to further understand the features and technical contents of the present invention, please refer to the following description of the embodiments of the present invention. The drawings and the drawings are for illustrative purposes only and are not intended to limit the invention. [Embodiment] Hereinafter, a preferred embodiment will be described with reference to the accompanying drawings for further explaining the components and functions of the present invention. The brief description of each of the drawings is as follows: Figure 3 is a ball screw with a dustproof device of the present invention. System diagram. Figure 4 is a combination view of the ball screw with the dustproof device of the present invention. Figure 5 is a cross-sectional view of the ball screw with the dustproof device of the present invention, the lip portion of the dustproof device interfering with the rolling groove of the long axis. Figure 6 is a view of the ball screw end of the dustproof device of the present invention. Figure 7 is a cross-sectional view of the ball screw with the dustproof device of the present invention. After the dustproof device is rotated, there is a gap between the lip system and the rolling groove of the long axis. Referring to FIG. 3 to FIG. 7 , the present invention is a ball screw with a dustproof device, comprising: a long shaft 1 , which is a long strip structure, the length The outer peripheral surface of the shaft 1 is provided with a spiral rolling groove 11; 201226743 A nut assembly comprises: a nut 2, at least one return passage (not shown), the nut 2 has a thread for the long shaft 1 The inner peripheral surface of the accommodating hole 21 is provided with a spiral rolling groove 211 and two spiral inner screw teeth 212, and the rolling groove 211 is disposed opposite to the rolling groove 11, and The rolling groove 11 and the rolling groove 211 form a load path, and the load path and the return channel form a circulation path (the reflow elements 3 exemplified in the embodiment are respectively disposed at the two ends of the receiving hole 21, The reflow element 3 has a return passage 31, and the nut 2 is provided with a return hole 23 extending in the axial direction and extending through the both end faces of the nut 2, and the two ends of the return passage 31 respectively engage the load path and the The return hole 23, the return channel of the embodiment is composed of two return channels 31 and a return hole 2 3, but also the return path of the return element is directly connected to the load path to form the circulation path, so the return channel is only constituted by the return channel. Because the claimed feature is a dustproof device Therefore, the circulation mode of the ball screw is not described in detail. For the replacement of the simple circulation method, the structure of the dustproof device is the same as that of the present invention, and is also within the scope of the invention.) The internal thread 212 is separately provided. The two ends of the accommodating hole 21 are provided in the circulation path; the two dustproof devices 4 have a through hole 41 through which the long shaft 1 is inserted, and the through hole 41 The inner edge surface is provided with a 201226743 lip portion 411 protruding toward the rolling groove 11. The outer edge surface of the dustproof device 4 is provided with a screw 42 opposite to the inner thread 212, and the inner thread 212 is coupled with The external thread 42 is screwed to each other to fix the dustproof device 4 to both ends of the receiving hole 21. In order to make the dustproof device 4 better in positioning, a positioning hole 22 and an alignment hole 43 are respectively disposed on the end surface of the nut 2 and the end surface of the dustproof device 4, and the protruding column is provided by a fixing block 5 51 is respectively disposed in the positioning hole 22 and the alignment hole 43 to limit the rotational freedom R of the dustproof device 4. Referring to FIG. 5 to FIG. 7 , the installation method of the dustproof device 4 is described. First, the external screw 42 of the dustproof device 4 and the screw 212 of the nut 2 are screwed together to prevent dust. The device 4 can be stably disposed in the receiving hole 21 of the nut 2, and then the assembler needs to rotate the ball screw to compare the rotation smoothness of the ball screw after the dustproof device 4 is installed, and the rotation of the dustproof device 4 is not installed. Whether the smoothness is different or not, if it is not smooth, the lip portion 411 of the dustproof device 4 and the rolling groove 11 are excessively interfered, as shown in Fig. 5, the symbol X is an interference, and at this time, the dustproof device only needs to be rotated. 4, to adjust the amount of interference of the lip portion 411 and the rolling groove 11 or to retain a small gap Η, as shown in Figure 7, so that the effect of preventing foreign matter from entering the accommodating hole 21 can be achieved, so that the ball screw can be rotated. Further, after the adjustment, the protrusion 51 of the fixing block 5 is inserted into the positioning hole 22 and the alignment hole 43 to limit the rotation of the dustproof device 4 from 201226743. In order to clarify the implementation features of the present invention, the following description shows the advantages and practical ways of the present invention: The dustproof device 4 can be fixed to the snail by the cooperation of the external screw and the internal thread of the nut. The lip portion 411 is disposed on or in contact with the rolling groove 11. The opposing dustproof device 4 does not apply the dustproof device 4 by the cooperation of the external screw and the screw inside the nut. The locking force in the radial direction (as in the prior art, the radial locking) does not allow the inner edge surface (lip portion 411) of the dustproof device 4 to generate a pseudo preload for the long axis 1 (ie, Excessive interference) Therefore, this creation has completely solved the problems caused by the improvement of the conventional technology, making the dustproof device more rapid in assembly and prolonging the service life of the dustproof device. In view of the above, the "industry availability" of the present invention should be unquestionable. In addition, the feature technology disclosed in the embodiment of the present invention has not been seen in publications before the application, nor has it been disclosed. The use not only has the fact that the effect is improved as described above, but also has an additional effect that cannot be neglected. Therefore, the "novelty" and "progressiveness" of the present invention are in compliance with the patent regulations, and the application for the invention patent is filed according to law. Please refer to the review and grant the patent as soon as possible. The disclosure of the above embodiments is used to illustrate the present invention and is not intended to limit the present invention. Therefore, the change of numerical values and the replacement of equivalent components should still be vested in this document. The scope of the invention.
11 201226743 【圖式簡單說明】 圖一係為習知技術之防塵裝置與滚珠螺桿之分 解圖。 圖二係為習知技術之防塵裝置與滾珠螺桿之組 合圖。 圖三係為本發明具防塵裝置之滚珠螺桿之系統 圖。 圖四係為本發明具防塵裝置之滾珠螺桿之組合 圖。 圖五係為本發明具防塵裝置之滾珠螺桿剖視 圖，防塵裝置之唇部係與長軸之滾動溝干涉。 圖六係為本發明具防塵裝置之滚珠螺桿端視圖。 圖七係為本發明具防塵裝置之滚珠螺桿剖視 圖，旋轉防塵裝置後，唇部係與長軸之滾動溝之間具 有間隙。 12 201226743 【主要元件符號說明】 習知技術 60螺桿 70螺帽 72容置槽 80滾珠 91刮刷部 • 900螺絲 本發明 1長軸 2螺帽 211滚動槽 22定位孔 3迴流元件 φ 4防塵裝置 411唇部 43對位孔 51凸柱 X干涉處 R旋轉自由度 61螺紋槽 71螺紋槽 73貫穿螺孔 90防塵裝置 92卡溝槽 Y徑方向 11滚動溝 21容置孔 212内螺牙 23迴流孔 31迴流道 41通孔 42外螺牙 5固定塊 6滾動體 Η間隙 1311 201226743 [Simple description of the drawing] Figure 1 is an exploded view of the dustproof device and the ball screw of the prior art. Figure 2 is a combination of a dustproof device of the prior art and a ball screw. Figure 3 is a system diagram of a ball screw with a dustproof device of the present invention. Figure 4 is a combination view of the ball screw with the dustproof device of the present invention. Figure 5 is a cross-sectional view of the ball screw with the dustproof device of the present invention, the lip portion of the dustproof device interfering with the rolling groove of the long axis. Figure 6 is a view of the ball screw end of the dustproof device of the present invention. Figure 7 is a cross-sectional view of the ball screw with the dustproof device of the present invention. After the dustproof device is rotated, there is a gap between the lip system and the rolling groove of the long axis. 12 201226743 [Description of main components] Conventional technology 60 screw 70 nut 72 accommodating groove 80 ball 91 scraping part • 900 screw The invention 1 long shaft 2 nut 211 rolling groove 22 positioning hole 3 reflow element φ 4 dustproof Device 411 lip 43 alignment hole 51 protrusion column X interference point R rotation degree of freedom 61 thread groove 71 thread groove 73 through screw hole 90 dustproof device 92 card groove Y radial direction 11 rolling groove 21 accommodating hole 212 thread 23 return hole 31 return channel 41 through hole 42 outer screw 5 fixed block 6 rolling body Η gap 13