1230232 玖、發明說明： 【發明所屬之技術領域】 本發明係關於一種滾珠螺桿，特別是指一種於螺帽内設 置有冷卻介質循環通道之滾珠螺桿。 【先前技術】 如圖八所示者，習用滾珠螺桿的冷卻方式，主要係於該 螺桿91部份沿軸方向的中央部位挖設有一軸向内孔92，且 其内部通常埋設有一管體93,管體93 一端係與設於螺桿Μ 一端之進口管94連接，而其另一端則與設於螺桿對側端之 出口 S 9 5連接，使油、水專冷卻液單向流通於螺桿91内部， 而得以攜出滾珠螺桿旋轉時所產生之高熱；而其構成上之主 要缺點為： 1)由於一般螺桿的長度皆遠大於螺帽的長度，且鋼珠 循％系統係設置於螺、帽内冑’滾珠螺桿運轉後，螺帽内部每 單位面積與循環鋼珠接觸的時間比螺桿每單位面積與循環 鋼珠接觸的時間高出許多，因此運轉所產生的熱量大部份集 中於螺帽上’螺帽溫度相對遠高於螺桿溫度，上述用的中空 導螺桿僅能直接冷卻螺桿部份，對於溫度較高的螺帽部份並 無法有效的冷卻，整體的冷卻效果並不顯著； 中 象 2) A中工滾珠螺桿一般被運用於高進給率的工具機 射工螺杯在焉速運轉時容易因偏心而產生若干振動現 對於 a栈的加工精度造成相當不利的影響； !23〇232 3) 由於中空螺桿之長度及外徑等因素，其於加工軸向 孔夺有八限制，且其冷卻液進口管及出口管分設於中空導 螺之兩側’其需佔用較大的設置空間，難以裝設於狹窄的空 間’形成應用上之不便與限制；以及 4) 又限於中空螺桿的外徑限制，其冷卻液於中空螺管 内難以形成一迴流設計，僅能單向通過該中空螺桿，使冷卻 液與螺杯的熱父換時間相當短促，熱交換效率難以有效提 昇。 本案發明人鑑於上述於螺桿内部設置冷卻通道的習用 中空滚珠螺桿所衍生的各項缺點，乃亟思加以改良創新，並 經多年苦心旨潛心研究後’終於成功研發完成本件於螺帽 内設置有冷卻介質循環通道之滾珠螺桿。 【發明目的】 本發明之目的即在於提供一種具冷卻通道之滾珠螺 桿，其可直料卻產生車交高運轉溫度的螺帽部份，具有較佳 的整體冷卻效果，進而使該滾珠螺桿較習用中空螺桿更適用 於高進給率及高加工精度的現代高速工具機。 本發明之次一目的係在於提供一種具冷卻通道之滾珠 螺补，其螺帽於咼速運轉時並無偏心振動現象，對於工具機 的加工精度並不造成任何不利的影變。 本發明之另一目的係在於提供一種具冷卻通道之滾珠 1230232 螺桿’其可於螺帽内部形成冷卻介質的迴流式循環通道，可 有效延長冷卻介質與螺帽的熱交換時間’藉以有效提昇冷卻 介質的熱交換效率。 本發明之又一目的係在於提供一種具冷卻通道之滾珠 螺桿’其冷卻介質的出、人σ可選擇直接安裝於螺帽或螺帽 兩側的端蓋上’其所需的設置空間遠小於習用中空螺桿所需 的設置空間，而可因應狹窄的空間佈設，此對於使用滾珠螺 桿作為傳動構件之各型機械（例如工具機等）之機構設計及 空間佈設，具有相當的便利性及適用性。 【發明内容】 可達成上述發明目的之具冷卻通道之滾珠螺桿，主要係 於螺帽兩側分別固設有内設數個槽溝的端蓋，利用兩側端蓋 的數個槽溝將螺帽内部所設置的數個冷卻通孔，連接成為一 冷卻介質之迴流式循環通道，將冷卻介質由一入口供應至該 循環通道内，藉以冷卻螺帽至一設定溫度值，吸收熱能後之 冷卻介質由一出口排出至外界。 該螺帽與其兩側端蓋間可分別設置有一防漏墊片，防止 冷卻介質之不當洩漏；同時該冷卻介質的出、入口可分別連 接至一冷卻介質供應裝置，形成一完整的冷卻循環系統，該 冷卻介質供應裝置包括有例如壓縮機、冷凝器、膨脹閥等已 知構件，藉以將於螺帽内部吸收熱能的冷卻介質降溫至_設 1230232 定的低溫工作溫度者。 【實施方式】 請參閱圖-，本發明所提供之滾珠螺桿1〇，包括有已知 形式的一螺桿u、數個鋼珠12、—鋼珠循環系統13及本發 明主要技耗徵料的純個冷料孔21的㈣20 :該鋼 珠12被置於該螺桿u與螺帽2〇之間，並利用該鋼珠循環 系統13使其循環運動；當螺桿11旋轉時可經由該等鋼珠12 帶動該螺帽20作-線性運動，使該滾珠螺桿1G可被作為例 如工具機等機械的進給裝置。 本發明主要係於該螺帽2〇内部沿軸向開設有數個貫穿 該螺帽20的冷卻通孔21，以供具有一設定工作溫度值的冷 卻介質進入該螺帽20内部，並與螺帽2〇進行熱交換，藉以 帶走該螺帽20與鋼珠丨2間因循環摩擦所產生的熱量；該冷 卻介質係指包含液體、氣體、固體等具有冷卻效果的各種物 質。 該螺帽20兩側分別固定設置有内具至少一個槽溝24的 端蓋23(如圖六及圖七所示者），利用兩側端蓋23的槽溝24 將該螺帽20内部所設置的數個冷卻通孔21，連接成為一冷 卻介質的迴流式循環通道，該冷卻介質由一入口 25供應至 該迴流式循環通道内，藉以冷卻螺帽至一設定溫度值，吸收 熱能後之冷卻介質由一出口 26排出至外界。 1230232 δ亥螺帽2 0與其兩侧端蓋p 而盡23間可分別設置有一防漏墊片 22 ’防正冷卻介質之不者 田/曳/属’該等防漏墊片22必須因應 該兩側端蓋23上所設样澧^ ^ 4 24的位置，開設相同位置及相同 數里的通孔2 7，使其不寻彡燮、人欠 、+〜θ冷部介質於該迴流式循環通道自 由流通者。 該兩側端蓋23及φ彳目I丨II*、、g # ,· 次兩側防漏墊片22可如圖二及圖三所示 者被埋設於該螺帽2 〇 & a /日，丨、山γ 的兩側鳊面内部；或如圖四及圖五所 示者被鎖固於該螺帽20的兩側端面上。 s上述冷卻介質的入口 25及出口 26分別位於該迴流式循 環通道的兩個開π端處，且其可如圖二及圖三所示者被設置 於该螺帽2。的兩側端面上；或如圖四及圖五所示者被設置 於該螺帽20的外圓肖面上；或被設置於該兩側端蓋23的端 面或外圓周面上；或依實際裝配需要的位置配置。 忒冷卻介質的入口 25及出口 26可分別連接至_冷卻介 質供應裝置（圖未示出），形成一完整的冷卻循環系統，該冷 Ύ為供應楚置包括有例如壓縮機、冷凝器、膨脹閥等已矣 構件，藉以將於螺帽20内部吸收熱能而溫度升高的冷卻介 質降溫至一設定的低溫工作溫度，再使其循環進 成螺帽20 内部，進行熱交換者。 【特點及功效】 本發明所提供之具冷卻通道之滚珠螺桿’與前述於螺才日 1230232 内部開設冷卻通孔之習用技術相互比較時’更具有下列之優 點· 1) 可直接冷卻產生較高運轉溫度的螺帽部份，具有較佳 的整體冷卻效果，進而使該滚珠螺桿較習用中空螺桿更適用 於高進給率及高加工精度的現代高速工具機，同時可確保滾 珠螺桿的精度及提高滾珠螺桿的使用壽命； 2) 可於螺帽内部形成冷卻介質的迴流式循環通道，而非 如習用技術的單向流動通孔，可有效延長冷卻介質與螺帽的 熱交換時間，藉以有效提昇冷卻介質的熱交換效率； 3) 由於螺帽係作一線性運動，因此螺帽並無習用中空螺 桿於高速旋轉時易產生的偏心振動現象，對於工具機的加工 精度並不造成任何不利的影響，更可相對有效提昇工具機的 加工精度； )冷卻介質的出、入口可選擇直接安裝 ％ Ί目我里系Γ曰 側的端盍上，其所需的設置空間遠小於習用中空螺桿所需I 設置空間，而可因應狹窄的空間佈設，此對於使用滾珠心 作為傳動構件之各型機械（例如卫具機等）之機構設計及； 間佈設，具有相當的便利性及適用性；以及 5)使用者僅需制—般接頭連接該迴流式循環通道合 ^口及出D，即可導人冷卻介質對螺帽内部進行冷卻，在, 裝上具有相當簡易的便利性。 1230232 上列δ羊細說明係針對本發明可行實施例之具體說明，惟 等實％例並非用以限制本發明之專利範圍，凡未脫離本發 明技藝精神所為 汀馬之專蚁貫施或變更，均應包含於本案之專利 範圍中。 所述，本案不但在技術思想上確屬 一·，，〜以j π 夏月匕平父^ 用物品增進卜抽、夕 夕員功效，應已充分符合新穎性及進步性之 法定發明專利要件，# 羑依法k出申請，懇請貴局核准本件 發月專和申凊案’以勵發明，至感德便。 【圖式簡單說明】 i閱以下有關本發明一較佳實施例之詳細說明及1附 t將可進-步瞭解本發明之技術内容及其目的功效；有關 該貫施例之附圖為·· 為本發明具冷卻通道之滾珠螺桿之軸向剖面視圖； 圖二為該滾珠螺桿中螺帽部份第—實施例之側面視圖； 圖二為圖二所示螺帽部份之正面視圖，· 圖四為該滾珠螺桿中螺帽 圖石， 伤第二實施例之側面視圖； 圖五為圖四所示螺帽部份之正面視圖，· 圖六為該滾珠螺桿中螺帽 圖… …伤的兩側端蓋之側面視圖； 圖七為圖六所示兩側端蓋 正®7視圖；以及 圖八為習用中空滾珠螺桿 r ^ ^ 之軸向剖面視圖。 ‘主要部分代表符號】1230232 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a ball screw, in particular to a ball screw provided with a cooling medium circulation channel in a nut. [Prior art] As shown in Figure 8, the cooling method of the conventional ball screw is mainly based on the fact that an axial inner hole 92 is dug in the central part of the screw 91 along the axial direction, and a pipe body 93 is usually buried inside the screw. One end of the tube body 93 is connected to the inlet pipe 94 provided at one end of the screw M, and the other end is connected to the outlet S 9 5 provided at the opposite end of the screw, so that the oil and water special coolant flows through the screw 91 in one direction. It can carry the high heat generated when the ball screw rotates. The main disadvantages of its structure are: 1) Because the length of the general screw is much larger than the length of the nut, and the steel ball circulation system is set on the screw and the cap. Internal 胄 'After the ball screw is running, the contact time per unit area inside the nut with the circulating steel ball is much higher than the contact time per unit area of the screw with the circulating steel ball, so most of the heat generated during operation is concentrated on the nut' The temperature of the nut is relatively higher than the temperature of the screw. The hollow lead screw used above can only directly cool the screw part. It cannot effectively cool the nut part with a higher temperature. The overall cooling effect is Significantly; Zhongxiang 2) A Zhonggong ball screw is generally used in high-feed-rate machine tools. Shooting screw cups are liable to generate some vibration due to eccentricity when running at high speed. Now it has a considerable adverse effect on the machining accuracy of a stack. ; 23〇232 3) Due to the length and outer diameter of the hollow screw, there are eight restrictions on the processing of the axial hole, and its coolant inlet pipe and outlet pipe are located on both sides of the hollow guide screw. Occupies a large installation space and is difficult to install in a narrow space, which is inconvenient and restrictive in application; and 4) It is also limited to the outer diameter limitation of the hollow screw, and it is difficult to form a reflux design for the coolant in the hollow solenoid. By passing the hollow screw in one direction, the heat exchange time between the cooling liquid and the screw cup is relatively short, and it is difficult to effectively improve the heat exchange efficiency. In view of the above-mentioned shortcomings derived from the conventional hollow ball screw provided with a cooling channel inside the screw, the inventor of the present case was eager to improve and innovate. After years of painstaking research, he finally successfully completed the development of this piece in the nut. Ball screw for cooling medium circulation channel. [Objective of the Invention] The purpose of the present invention is to provide a ball screw with a cooling channel, which can directly produce a nut part with high operating temperature at the turn of the car, and has a better overall cooling effect, thereby making the ball screw The conventional hollow screw is more suitable for modern high-speed machine tools with high feed rates and high machining accuracy. A secondary object of the present invention is to provide a ball screw with a cooling channel. The nut has no eccentric vibration during high-speed operation, and does not cause any adverse effect on the machining accuracy of the machine tool. Another object of the present invention is to provide a ball 1230232 screw with a cooling channel, which can form a recirculation circulation channel of the cooling medium inside the nut, which can effectively extend the heat exchange time between the cooling medium and the nut, thereby effectively improving cooling. Heat exchange efficiency of the medium. Yet another object of the present invention is to provide a ball screw with a cooling channel 'its cooling medium can be directly installed on the nut or the end caps on both sides of the nut', and its required installation space is much smaller than The space required for the hollow screw is used, and it can be laid out in accordance with the narrow space. This has considerable convenience and applicability for the mechanism design and space layout of various types of machinery (such as machine tools) that use ball screws as transmission components. . [Summary of the invention] The ball screw with cooling channel that can achieve the above-mentioned object of the invention is mainly fixed on both sides of the nut with end caps with a plurality of grooves inside. Several cooling through holes provided inside the cap are connected to form a return flow circulation channel of the cooling medium, and the cooling medium is supplied into the circulation channel from an inlet, thereby cooling the nut to a set temperature value and cooling after absorbing thermal energy The medium is discharged to the outside through an outlet. A leak-proof gasket can be respectively provided between the nut and the end caps on both sides to prevent improper leakage of the cooling medium; meanwhile, the inlet and outlet of the cooling medium can be respectively connected to a cooling medium supply device to form a complete cooling circulation system. The cooling medium supply device includes known components such as a compressor, a condenser, an expansion valve, etc., so that the cooling medium that will absorb the heat energy inside the nut is cooled down to a low temperature set by 1230232. [Embodiment] Please refer to FIG.-, the ball screw 10 provided by the present invention includes a screw u in a known form, several steel balls 12, steel ball circulation system 13 and pure materials which are mainly used in the present invention. ㈣20 of the cold material hole 21: the steel ball 12 is placed between the screw u and the nut 20, and the steel ball circulation system 13 is used to make it circulate; when the screw 11 rotates, the screw can be driven by the steel balls 12 The cap 20 performs a linear movement, so that the ball screw 1G can be used as a feeding device for a machine such as a machine tool. The present invention is mainly provided in the nut 20 with a plurality of cooling through holes 21 extending through the nut 20 in the axial direction so that a cooling medium having a set operating temperature value can enter the nut 20 and communicate with the nut. 20 Perform heat exchange to take away the heat generated by the cyclic friction between the nut 20 and the steel ball 丨 2; the cooling medium refers to various substances that have a cooling effect such as liquid, gas, and solid. An end cover 23 (as shown in FIGS. 6 and 7) having at least one groove 24 is fixed on each side of the nut 20, and the inside of the nut 20 is formed by using the grooves 24 of the end cover 23 on both sides. A plurality of cooling through holes 21 provided are connected to a return-type circulation channel that becomes a cooling medium. The cooling medium is supplied into the return-type circulation channel through an inlet 25, thereby cooling the nut to a set temperature value and absorbing heat energy. The cooling medium is discharged to the outside through an outlet 26. 1230232 δ helical nut 2 0 and end caps on both sides of it can be provided with a leak-proof gasket 22 as far as possible. The position of the sample 澧 ^^ 4 on the end caps 23 on both sides is 24, and the same position and the same number of through holes 2 7 are opened, so that it is not found, people owe, + ~ θ cold part medium in the reflux type Free circulation circulation channel. The end caps 23 on both sides and φ 彳 目 I 丨 II * ,, g #, and the leakage preventive gasket 22 on both sides can be buried in the nut 2 as shown in FIG. 2 and FIG. 3. On the two sides, the inner surfaces of the two sides of the mountain γ, or as shown in FIGS. 4 and 5 are locked to the end faces of the nut 20 on both sides. The inlet 25 and outlet 26 of the above-mentioned cooling medium are located at the two open pi ends of the return-type circulation channel, respectively, and they can be provided on the nut 2 as shown in Figs. 2 and 3. On both end faces; or as shown in Figs. 4 and 5 on the outer surface of the nut 20; or on the end faces or outer circumferential surfaces of the end caps 23 on both sides; or Location configuration required for actual assembly. The inlet 25 and outlet 26 of the cooling medium can be respectively connected to a cooling medium supply device (not shown in the figure) to form a complete cooling cycle system. The cooling unit includes, for example, a compressor, a condenser, and an expansion unit. Valves and other components have been used to reduce the temperature of the cooling medium that has absorbed the heat energy inside the nut 20 to a set low temperature operating temperature, and then circulate it into the inside of the nut 20 for heat exchange. [Features and effects] When the ball screw with cooling channel provided by the present invention is compared with the above-mentioned conventional technology of opening a cooling through hole in the screw hole 1230232, it has the following advantages. 1) It can be directly cooled to produce higher The nut part at the operating temperature has better overall cooling effect, so that the ball screw is more suitable for modern high-speed machine tools with high feed rate and high processing accuracy than the conventional hollow screw. At the same time, it can ensure the accuracy of the ball screw and Increase the service life of the ball screw; 2) A return-type circulation channel for the cooling medium can be formed inside the nut, instead of the unidirectional flow through hole as in conventional technology, which can effectively extend the heat exchange time between the cooling medium and the nut, thereby effectively Improve the heat exchange efficiency of the cooling medium; 3) Since the nut is in a linear motion, the nut is not used to the eccentric vibration phenomenon that can occur when the hollow screw rotates at high speed, which does not cause any disadvantage to the machining accuracy of the machine tool Influence, can more effectively improve the machining accuracy of the machine tool;) cooling medium can be directly installed at the inlet and outlet In the end, the installation space on the side is much smaller than the installation space required for the conventional hollow screw, and it can be installed in accordance with the narrow space. This is for various types of machinery that use ball cores as transmission components. (Such as health machines, etc.) mechanism design and layout; it has considerable convenience and applicability; and 5) the user only needs to make a general connector to connect the return type circulation channel opening and outlet D, and then Guided cooling medium cools the inside of the nut, and it is quite easy to install. 1230232 The above δ sheep detailed description is a specific description of the feasible embodiments of the present invention, but the actual examples are not intended to limit the scope of the patent of the present invention. Shall be included in the patent scope of this case. As mentioned above, this case is not only technically ideological, but also uses j π Xia Yue Ding Ping ^ to use articles to enhance the effectiveness of the pumping and xixi members, which should have fully met the statutory invention patent requirements of novelty and progress # 出 According to the law, make an application, and kindly ask your bureau to approve this case to issue a monthly and application case to encourage inventions, and it will be very moral. [Brief description of the drawings] I can read the following detailed description of a preferred embodiment of the present invention and 1 attached t to further understand the technical content of the present invention and its purpose and effectiveness; the drawings related to this embodiment are: · It is an axial sectional view of a ball screw with a cooling channel according to the present invention; FIG. 2 is a side view of the first embodiment of the nut portion of the ball screw; FIG. 2 is a front view of the nut portion shown in FIG. · Figure 4 is a side view of the nut in the ball screw, which hurts the second embodiment; Figure 5 is a front view of the nut part shown in Figure 4; · Figure 6 is a nut in the ball screw ... A side view of the end caps on both sides of the injury; Figure 7 is a front view of the two end caps shown in Figure 6; and Figure 8 is an axial sectional view of a conventional hollow ball screw r ^ ^. ‘The main part represents the symbol]