200949098 九、發明說明： 【發明所屬之技術領域】 本發明係提供一種具迴流構件之滚珠螺桿，其係提供 切線外循環滚珠螺桿或滾柱螺桿運用，以同時解決習知迴 流路徑曲率半徑較小、零組件過多、破壞螺帽剛性等問題 之特殊技術。 【先前技術】 請參閱圖一及二所示，其係滚珠或滾柱螺桿之迴流 裝置，其包括有： 一可供螺桿螺合之螺帽（91)，該螺帽（91)具有貫穿 兩端之内螺紋（92)，而螺帽（91)外側則設置有至少二連 通内螺紋（92)之穴槽（93); 一迴流管（94)，其兩端緣分別形成相對應之弧曲段 (941); 二腳座（95)，其--對應的組設於二穴槽（93)中， 並具有能鎖固於穴槽（93)之鎖耳（951)，該腳座（95)頂端 則凹設有可供弧曲段（941)底端銜接之凹槽（952)，且腳 座（95)由頂端向底端貫設有連通迴流管（94)、内螺紋（92) 之引道（953) ’使滾珠或滾柱能於内螺紋（92)、腳座 (95)、迴流管（94)中循環。 其可組裝於螺帽（91)之迴流管（94)、腳座（95)係提 供滾珠或滾柱安裝至内螺紋（92)，使滾珠或滚柱能於内 200949098 , 螺紋（92)中循環，但是該習用迴流裝置有以下之缺點： 1.迴流管（94)於腳座（95)上方組合，若螺帽（91)外徑 較小時，會使得迴流管（94)弧曲段（941)的迴流半 徑蠻小。 2·此方式使得螺帽（91)外徑無法太大，否則穴槽（93) 加工深度會太深，結構剛性變差。 3.迴流管（94)需要彎製且與腳座（95)分離，配件製作 ❹ 不易。 【發明内容】 本發明主要内容在於：提供一種具迴流構件之滾珠 螺桿，其包括有： 一具有貫穿導孔之迴流管，其兩端緣分別形成相對 應之弧曲段； 二柱狀腳座，係一體成型於弧曲段外周，俾讓腳座 ©具有容易組裝至螺帽穴槽而對接内螺紋之功能，並使弧 曲段含蓋於腳座-頂面及-側面相交之部分區域。 藉弧曲段連接於腳座細之對應關係，可使該孤曲 段之導孔料半徑械•，叫賴昇滚珠或滚柱於 導孔循環之順暢度，且該迴流構件之—體構造尚具有簡 化零組件之經濟性，以及使螺帽穴槽切麻度相對減少 而具有較佳之剛性，其料為現今滾珠或滚柱螺桿之迴 200949098 . 流裝置提出一有效解決的新穎技術。 【實施方式】 為使責審查委員能進一步暸解本發明之結構，特徵 及其他目的，玆附以較佳實施例之圖式詳細說明如后： 請參閱圖三至七’本發明迴流裝置主要包含： 一螺桿（10)，其外徑具有螺旋狀之外螺紋（11); 一螺帽（20)，係具有一可供螺桿（10)穿入之内孔，該 ❹ 内孔中設有與螺桿（10)外螺紋（11)相對應之内螺紋（21)， 而螺帽（20)外周銑削有一安裝面（22)，而安裝面（22)則設 置有至少二連通内螺紋（21)之穴槽（23)，此安裝面（22)在 二穴槽（23)鄰近之角隅則凹設有錐狀逃離部（24); 複數之滾動元件（30)，其可為滾珠或滚柱，係保持於 前述螺桿（10)之外螺紋（11)及螺帽（20)之内螺紋（21) 間，使螺帽（20)和螺桿（10)間可被相互轉動； ® 一迴流構件（40)，其係由迴流管（41)及柱狀腳座（42) 一體以樹脂成型製成；其迴流管（41)具有中空之導孔 (410)，且於兩端緣分別彎曲成相對應之弧曲段（411); 腳座（42)係成型於此弧曲段（411)外周，且令腳座（42)、 弧曲段（411)底端切齊’令導孔（410)由腳座（42)底端透 出，俾讓腳座（42)具有容易組裝至螺帽（2〇)穴槽（23)而 對接内螺紋（21)之功能，且令兩弧曲段（411)頂緣恰位於 200949098 ^逃離部（24)中，以避免干料形降低迴流管⑹ 突出之高度；該弧曲段（411)係含蓋於腳座（42)-頂面 (421)及-側面（422)相交之部分區域，藉㈣段（411) 連接於腳座（42)頂端角隅之對應關係，可使導孔（41〇) 能由腳座⑽底端之同侧角隅透出，以有效加大該弧曲 段（411)導孔（410)之曲率半徑，令該導孔（41〇)中心線 與螺帽（20)内螺紋（21)節圓直徑相切，俾能大大提 ❹ 昇滾動元件（30)於該處循環之順暢度；以及 一固定板（50)，其由底面向上成型有一容穴（51)， 此容穴（51)恰能供迴流管（41)對合，以使固定板（5〇)藉 螺栓（52)而鎖設至安裝面（22)時，其容穴（51)恰能有效 的壓制迴流管（41) ’用以將迴流構件（4〇)固定於螺帽 (20)，逕而構成一迴流裝置。 由以上說明得知，本發明至少具有以下優點： ❹ 1.其弧曲段（411)連接於腳座（42)頂端角隅，使導孔 (410)能由腳座（42)底端之同側角隅透出，該等構造可有 效加大該弧曲段（411)導孔（410)之曲率半徑，以提昇滾 動元件（30)於該處循環之順暢度。 2.該迴流構件（40)係將迴流管（41)及腳座（42)—體 成型製造，該等構造具有簡化零組件或組裝方便之經濟 效益。 8 200949098 - 3.本發明由於腳座（42)與迴流管（41)係採一體設 置，所以可容易的為固定板（50)壓制的鎖合於螺帽（2〇) 安裝面（22)上，如此便能使螺帽（2〇)穴槽（23)切削深度 相對減少，使螺帽（20)具有較佳之剛性。 請另外參閱圖三，本發明為使迴流構件（4〇)能夠大 量生產，其沿導孔（410)中心線的將腳座（42)與迴流管 (41)對半剖成二部件，以使導孔（41〇)形成開放空 ® 間，據以達到成型容易之目的，而此二部件具有 扣合結構，使二者極容易組合成一迴流構件（4〇)。 综上所述，本發明是一技術理念上的高度發明，應符 專利申請要件，爰依法提出申請。惟以上所述者，僅為本 發明之一較佳實施例而已，當不能以之限定本發明實施之 範圍，即大凡依本發明申請專利範圍所作之均等變化與修 飾’皆應仍屬本發明涵蓋之範園内。 200949098 【圖式簡單說明】 圖一：係傳統迴流管與腳座之分解示意圖。 圖二：係傳統螺帽、迴流管、腳座之組合外觀示意圖。 圖三：係本發明之分解示意圖。 圖四：係本發明之組合外觀示意圖。 圖五：係本發明之組合透視示意圖。200949098 IX. Description of the invention: [Technical field of the invention] The present invention provides a ball screw with a reflow member, which provides an application of a tangentially recirculating ball screw or a roller screw to simultaneously solve a conventional radius of curvature of a return path. Special techniques for problems such as excessive components and damage to the rigidity of the nut. [Prior Art] Referring to Figures 1 and 2, it is a ball or roller screw reflow device, which comprises: a nut (91) for screwing the screw, the nut (91) has two through The inner thread (92) of the end, and the outer side of the nut (91) is provided with at least two pockets (93) connecting the internal threads (92); a return tube (94), the opposite ends of which form corresponding arcs respectively a curved section (941); a two-legged seat (95), wherein the corresponding group is disposed in the two-chamber slot (93) and has a locking ear (951) that can be locked to the pocket (93), the footrest (95) The top end is recessed with a groove (952) for engaging the bottom end of the curved section (941), and the foot seat (95) is connected to the return pipe (94) and the internal thread from the top end to the bottom end ( 92) Approach (953) 'Route the ball or roller in the internal thread (92), the foot (95), and the return line (94). It can be assembled into the return pipe (94) of the nut (91), and the foot (95) is provided with balls or rollers to be mounted to the internal thread (92), so that the ball or the roller can be inserted in the inner 200949098, the thread (92) Circulation, but the conventional reflow device has the following disadvantages: 1. The return pipe (94) is combined above the foot (95). If the outer diameter of the nut (91) is small, the return pipe (94) is curved. The return radius of (941) is quite small. 2. This method makes the outer diameter of the nut (91) not too large, otherwise the machining depth of the pocket (93) will be too deep and the structural rigidity will be deteriorated. 3. The return pipe (94) needs to be bent and separated from the foot (95), making the fittings difficult. SUMMARY OF THE INVENTION The main content of the present invention is to provide a ball screw having a reflow member, comprising: a return pipe having a through-hole; the two end edges respectively form corresponding arc segments; The system is integrally formed on the outer circumference of the curved section, so that the foot base has the function of being easily assembled to the nut pocket and butting the internal thread, and the curved section covers the part where the foot-top surface and the side surface intersect. . By the arc curve connected to the corresponding relationship of the foot, the radius of the guide hole of the solitary section can be made, that is, the smoothness of the circulation of the roller or the roller in the guide hole, and the body structure of the return member It also has the economics of simplifying the components, and the rigidity of the nut cavities is relatively reduced, and the material is the back of the current ball or roller screw. 200949098. The flow device proposes an effective new technology. [Embodiment] For the purpose of further understanding of the structure, features and other objects of the present invention, the detailed description of the preferred embodiments is as follows: Please refer to Figures 3 to 7 'The reflow device of the present invention mainly comprises a screw (10) having an outer diameter having a helical outer thread (11); a nut (20) having an inner bore through which the screw (10) can be inserted, the inner bore of the bore being provided with The external thread (11) of the screw (10) corresponds to the internal thread (21), and the outer surface of the nut (20) is milled with a mounting surface (22), and the mounting surface (22) is provided with at least two internal threads (21). a groove (23), the mounting surface (22) is concavely provided with a tapered escape portion (24) at a corner adjacent to the two-hole groove (23); a plurality of rolling elements (30), which may be balls or rolls The column is held between the thread (11) outside the screw (10) and the internal thread (21) of the nut (20), so that the nut (20) and the screw (10) can be rotated with each other; a member (40) which is integrally formed of a resin by a return pipe (41) and a cylindrical foot (42); and a return pipe (41) having a hollow guide hole (410) And the two ends are respectively bent into corresponding arc segments (411); the foot (42) is formed on the outer circumference of the arc segment (411), and the foot (42) and the arc segment (411) are bottomed. The end-cutting is used to make the guide hole (410) protrude from the bottom end of the foot (42), so that the foot (42) has an easy assembly to the nut (2) groove (23) and the internal thread (21) The function is such that the top edge of the two arc segments (411) is located in the escape portion (24) of the 200949098 ^ to avoid the dry shape reducing the height of the protruding portion of the return pipe (6); the curved segment (411) is covered with the foot The portion of the seat (42)-top (421) and the side (422) intersects, and the (4) segment (411) is connected to the top corner of the foot (42) to enable the guide hole (41〇). The inner side corner of the bottom end of the foot (10) is transparently enlarged to effectively increase the radius of curvature of the guide hole (410) of the curved portion (411), so that the guide hole (41〇) center line and the nut (20) The pitch of the internal thread (21) is tangent, the 俾 can greatly improve the smoothness of the rolling element (30) circulating there; and a fixing plate (50) which is formed with a cavity (51) from the bottom surface. This cavity (51) can supply reflux (41) Aligning, so that the fixing plate (5 〇) is locked to the mounting surface (22) by the bolt (52), the cavity (51) can effectively suppress the return pipe (41) 'for The return member (4〇) is fixed to the nut (20) and has a diameter to constitute a reflow device. From the above description, the present invention has at least the following advantages: ❹ 1. The curved section (411) is connected to the top corner 隅 of the foot (42) so that the guide hole (410) can be supported by the bottom end of the foot (42). The same side corners are permeable, and the structures can effectively increase the radius of curvature of the guide hole (410) of the curved section (411) to improve the smoothness of the rolling element (30) circulating there. 2. The reflow member (40) is formed by integrally forming a return pipe (41) and a foot (42), which have the economic benefit of simplifying the components or facilitating assembly. 8 200949098 - 3. In the present invention, since the foot (42) and the return pipe (41) are integrally provided, the fixing plate (50) can be easily pressed to the nut (2) mounting surface (22). In this way, the cutting depth of the nut (2) groove (23) can be relatively reduced, so that the nut (20) has better rigidity. Referring additionally to FIG. 3, in order to enable the reflow member (4〇) to be mass-produced, the foot (42) and the return pipe (41) are half-cut into two parts along the center line of the guide hole (410) to The guide holes (41 turns) are formed into an open space, which is easy to form, and the two members have a snap-fit structure, so that the two are easily combined into one return member (4 turns). In summary, the present invention is a highly invented technical concept, which should meet the requirements of a patent application, and apply in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the average variation and modification of the scope of the patent application of the present invention should still belong to the present invention. Covered in the park. 200949098 [Simple description of the diagram] Figure 1: Schematic diagram of the decomposition of the traditional return pipe and the foot. Figure 2: A schematic view of the combination of a conventional nut, a return pipe, and a foot. Figure 3 is an exploded perspective view of the present invention. Figure 4 is a schematic view showing the appearance of the combination of the present invention. Figure 5 is a schematic perspective view of the combination of the present invention.
圖六：係本發明迴流構件與螺帽之局部剖面示意圖。 圖七：係本發明圖四A-A位置之剖面示意圖。 【主要元件符號說明】 (10)螺桿 （11)外螺紋 (20)螺帽 （21)内螺紋 (22)安裝面 （23)穴槽 (24)逃離部 (30)滾動元件 ® (40)迴流構件 （41)迴流管 (410)導孔 （411)弧曲段 (42)腳座 （421)頂面 (422)側面 (50)固定板 （51)容穴 (52)螺栓Figure 6 is a partial cross-sectional view showing the reflow member and the nut of the present invention. Figure 7 is a schematic cross-sectional view of the position A-A of Figure 4 of the present invention. [Description of main component symbols] (10) Screw (11) External thread (20) Nut (21) Internal thread (22) Mounting surface (23) Clot (24) Escape part (30) Rolling element® (40) Reflow Member (41) return pipe (410) guide hole (411) arc segment (42) foot (421) top surface (422) side (50) fixing plate (51) cavity (52) bolt