TW201443353A - Ball screw device with preload sensing function - Google Patents
Ball screw device with preload sensing function Download PDFInfo
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- TW201443353A TW201443353A TW102115779A TW102115779A TW201443353A TW 201443353 A TW201443353 A TW 201443353A TW 102115779 A TW102115779 A TW 102115779A TW 102115779 A TW102115779 A TW 102115779A TW 201443353 A TW201443353 A TW 201443353A
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Abstract
Description
本發明係與滾珠螺桿裝置有關，特別是關於一種具有預壓力感測功能之滾珠螺桿裝置。 The present invention relates to a ball screw device, and more particularly to a ball screw device having a pre-pressure sensing function.
滾珠螺桿裝置是精密定位中常用的零組件，包含有一受馬達驅轉之螺桿、一受該螺桿帶動而直線移動之螺帽以及多數設置於螺桿與螺帽之間的滾珠，滾珠以滾動方式作為螺桿與螺帽間動力傳輸介面，藉以大幅降低運動時的摩擦阻力。 The ball screw device is a commonly used component in precision positioning, and includes a screw driven by a motor, a nut that is linearly moved by the screw, and a plurality of balls disposed between the screw and the nut. The ball is rolled in a rolling manner. The power transmission interface between the screw and the nut greatly reduces the frictional resistance during exercise.
滾珠螺桿裝置本身通常會設有預壓力，以消除滾珠與螺桿、螺帽之間的軸向間隙，進而增加滾珠螺桿裝置運轉時的剛性、定位精度以及定位的穩定性，因此預壓力為衡量滾珠螺桿裝置之剛性、定位精度及定位穩定性的重要指標之一。然而，經過一段時間的使用，滾珠與螺桿、螺帽之間會因為磨耗而形成軸向間隙，使得預壓力逐漸消失，導致剛性、定位精度及定位穩定性逐漸降低。 The ball screw device itself usually has a pre-pressure to eliminate the axial gap between the ball and the screw and the nut, thereby increasing the rigidity, positioning accuracy and positioning stability of the ball screw device during operation, so the pre-pressure is a measure of the ball. One of the important indexes of the rigidity, positioning accuracy and positioning stability of the screw device. However, after a period of use, an axial gap is formed between the ball and the screw and the nut due to wear, so that the pre-pressure gradually disappears, resulting in a gradual decrease in rigidity, positioning accuracy, and positioning stability.
中華民國專利公開編號201204960之專利案揭露了一種可感測出滾珠螺桿裝置之預壓力是否失效的方法，係對滾珠螺桿裝置運作時發出的聲紋訊號進行經驗模態分解濾波，再使用希爾伯特黃轉換(HHT)以產生希爾伯特黃圖譜(HHS)，接著再使用多尺度熵萃取，以產生聲紋訊號的多尺度熵複雜度模式，然後比較原始的多尺度熵複雜度模式與現況的多尺度熵複雜度模式，藉以診斷出滾珠螺桿裝置的預壓力是否消失。 The patent of the Republic of China Patent Publication No. 201204960 discloses a method for sensing whether the pre-pressure of the ball screw device is invalid, and performing empirical mode decomposition filtering on the voiceprint signal emitted by the ball screw device, and then using Hill. Bert Yellow Transform (HHT) to generate Hilbert Yellow Map (HHS), followed by multi-scale entropy extraction to generate a multi-scale entropy complexity pattern of the voiceprint signal, and then compare the original multi-scale entropy complexity pattern The multi-scale entropy complexity mode with the current situation is used to diagnose whether the pre-pressure of the ball screw device disappears.
然而，前述之先前技術在實際施行時，並未直接地對滾珠螺桿裝置之受力狀況進行量測，而且很容易受到其他環境因素影響，例如加工過程所產生的振動、噪音或頻率等等，因此其量測結果的準確度較不理想。 However, the foregoing prior art does not directly measure the force condition of the ball screw device when it is actually implemented, and is easily affected by other environmental factors, such as vibration, noise or frequency generated by the machining process, etc. Therefore, the accuracy of the measurement results is less than ideal.
有鑑於上述缺失，本發明之主要目的在於提供一種具有預壓力感測功能之滾珠螺桿裝置，可供即時監控其預壓力，且係採用直接感測之方式，因而較不易受環境因素影響，因此其感測結果較為準確。 In view of the above-mentioned deficiencies, the main object of the present invention is to provide a ball screw device with a pre-pressure sensing function, which can be used for monitoring the pre-pressure in real time, and adopts a direct sensing method, so that it is less susceptible to environmental factors, so The sensing result is more accurate.
為達成上述目的，本發明所提供之具有預壓力感測功能之滾珠螺桿裝置，包含有一螺帽、一螺桿以及複數滾珠，該滾珠螺桿裝置能定義出一中心軸線，該螺帽具有一繞著該中心軸線之內螺紋，該螺桿係穿設於該螺帽並具有一繞著該中心軸線之外螺紋，該等滾珠係能滾動地設置於該螺帽之內螺紋及該螺桿之外螺紋之間；該滾珠螺桿裝置之特徵在於：該螺帽設有一安裝孔，該安裝孔內具有一安裝面，該安裝面係實質上以垂直於該中心軸線之方向而對應於該內螺紋，且該安裝面設置一力量感測器。 In order to achieve the above object, a ball screw device with a pre-pressure sensing function provided by the present invention comprises a nut, a screw and a plurality of balls, wherein the ball screw device can define a central axis, and the nut has a surrounding An internal thread of the central axis, the screw is threaded through the nut and has a thread around the central axis, and the balls are rollably disposed on the internal thread of the nut and the external thread of the screw The ball screw device is characterized in that: the nut is provided with a mounting hole, the mounting hole has a mounting surface, the mounting surface substantially corresponding to the internal thread in a direction perpendicular to the central axis, and the A force sensor is provided on the mounting surface.
藉此，該力量感測器能直接地感測出滾珠施予螺帽之壓力，因此該力量感測器之輸出訊號可供使用者即時監控滾珠螺桿裝置之預壓力維持狀況，以即時得知預壓力不足之問題並進行調整，且其感測結果較不易受環境因素影響，因而較為準確。 Thereby, the force sensor can directly sense the pressure of the ball feeding nut, so the output signal of the force sensor can be used for the user to immediately monitor the pre-pressure maintaining state of the ball screw device, so as to be instantly known. The problem of insufficient pre-stress is adjusted and the sensing result is less susceptible to environmental factors, so it is more accurate.
有關本發明所提供之具有預壓力感測功能之滾珠螺桿裝置的詳細構造、特點、組裝或使用方式，將於後續的實施方式詳細說明中予以描述。然而，在本發明領域中具有通常知識者應能瞭解，該等詳細說明以及實施本發明所列舉的特定實施例，僅係用於說明本發明，並非用以限制本發明之專利申請範圍。 The detailed construction, features, assembly or use of the ball screw device having the pre-pressure sensing function provided by the present invention will be described in the detailed description of the subsequent embodiments. However, it should be understood by those of ordinary skill in the art that the present invention is not limited by the scope of the invention.
10‧‧‧滾珠螺桿裝置 10‧‧‧Ball screw device
20‧‧‧螺帽 20‧‧‧ nuts
22‧‧‧穿孔 22‧‧‧Perforation
24‧‧‧內螺紋 24‧‧‧ internal thread
26‧‧‧安裝孔 26‧‧‧Installation holes
262‧‧‧安裝面 262‧‧‧Installation surface
264‧‧‧開口 264‧‧‧ openings
28‧‧‧圓柱面 28‧‧‧ cylindrical surface
30‧‧‧螺桿 30‧‧‧ screw
32‧‧‧外螺紋 32‧‧‧External thread
40‧‧‧滾珠 40‧‧‧ balls
50‧‧‧力量感測器 50‧‧‧Power Sensor
60‧‧‧螺帽 60‧‧‧ nuts
62‧‧‧安裝孔 62‧‧‧Installation holes
622‧‧‧安裝面 622‧‧‧Installation surface
64‧‧‧內螺紋 64‧‧‧ internal thread
70‧‧‧螺帽 70‧‧‧ nuts
72‧‧‧安裝孔 72‧‧‧Installation holes
722‧‧‧安裝面 722‧‧‧Installation surface
L‧‧‧中心軸線 L‧‧‧ center axis
第1圖為本發明一第一較佳實施例所提供之具有預壓力感測功能之滾珠螺桿裝置的立體組合圖；第2圖為本發明該第一較佳實施例所提供之具有預壓力感測功能之滾珠螺桿裝置的剖視圖；第3圖為本發明一第二較佳實施例所提供之具有預壓力感測功能之滾珠螺桿裝置的局部剖視圖；以及第4圖為本發明一第三較佳實施例所提供之具有預壓力感測功能之滾 珠螺桿裝置的局部剖視圖。 1 is a perspective assembled view of a ball screw device with a pre-pressure sensing function according to a first preferred embodiment of the present invention; and FIG. 2 is a pre-pressure provided by the first preferred embodiment of the present invention. FIG. 3 is a cross-sectional view of a ball screw device having a pre-pressure sensing function according to a second preferred embodiment of the present invention; and FIG. 4 is a third view of the present invention Roll with pre-pressure sensing function provided by the preferred embodiment A partial cross-sectional view of the bead screw device.
申請人首先在此說明，在以下將要介紹之實施例以及圖式中，相同之參考號碼，表示相同或類似之元件或其結構特徵。 The Applicant first describes the same or similar elements or structural features thereof in the embodiments and the drawings which will be described below.
請先參閱第1圖及第2圖，本發明一第一較佳實施例所提供之具有預壓力感測功能之滾珠螺桿裝置10主要包含有一螺帽20、一螺桿30以及複數滾珠40。 Referring to FIG. 1 and FIG. 2 , a ball screw device 10 having a pre-pressure sensing function according to a first preferred embodiment of the present invention mainly includes a nut 20 , a screw 30 , and a plurality of balls 40 .
該滾珠螺桿裝置10係與習用者類同，能定義出一中心軸線L，該螺帽20具有一以該中心軸線L為中心之穿孔22，該穿孔22內具有一繞著該中心軸線L之內螺紋24，該螺桿30係能轉動地穿設於該螺帽20之穿孔22，並具有一繞著該中心軸線L之外螺紋32，該等滾珠40係能滾動地設置於該螺帽20之內螺紋24及該螺桿30之外螺紋32之間，藉以將該螺桿30之動力傳輸至該螺帽20而使該螺帽20直線移動，並以滾動方式大幅降低運動時的摩擦阻力。 The ball screw device 10 is similar to the conventional one and can define a central axis L. The nut 20 has a through hole 22 centered on the central axis L. The through hole 22 has a center axis L around the central axis L. The internal thread 24 is rotatably disposed through the through hole 22 of the nut 20 and has a thread 32 around the central axis L. The balls 40 are rollably disposed on the nut 20 Between the internal thread 24 and the external thread 32 of the screw 30, the power of the screw 30 is transmitted to the nut 20 to linearly move the nut 20, and the frictional resistance during movement is greatly reduced in a rolling manner.
該滾珠螺桿裝置10與習用者之差異在於該螺帽20設有一安裝孔26，該安裝孔26內具有一安裝面262，該安裝面262係實質上以垂直於該中心軸線L之方向(在第2圖中為向下之方向)而對應於該內螺紋24，且該安裝面262設置一力量感測器50。該力量感測器50可為(但不限於)一應變規，藉以直接地感測滾珠40施予螺帽20之壓力。 The ball screw device 10 differs from the conventional one in that the nut 20 is provided with a mounting hole 26 having a mounting surface 262 therein, the mounting surface 262 being substantially perpendicular to the central axis L (in The downward direction of FIG. 2 corresponds to the internal thread 24, and the mounting surface 262 is provided with a force sensor 50. The force sensor 50 can be, but is not limited to, a strain gauge to directly sense the pressure at which the ball 40 is applied to the nut 20.
在本實施例中，該安裝孔26為一盲孔，且係自該螺帽20外側之圓柱面28以垂直於該中心軸線L之方向而向內凹陷，該安裝面262為一平面，且係面對該安裝孔26之開口264；藉此，該安裝孔26相當容易鑽設，且其安裝面262可相當接近該內螺紋24，使得該力量感測器50感測預壓力之效果更為靈敏。 In this embodiment, the mounting hole 26 is a blind hole, and the cylindrical surface 28 from the outer side of the nut 20 is inwardly recessed in a direction perpendicular to the central axis L. The mounting surface 262 is a flat surface, and The opening 264 of the mounting hole 26 is formed; thereby, the mounting hole 26 is relatively easy to drill, and the mounting surface 262 thereof can be relatively close to the internal thread 24, so that the force sensor 50 senses the effect of the pre-pressure. Be sensitive.
然而，本發明所提供之滾珠螺桿裝置中，該螺帽之安裝孔設置的位置並不以前述實施例所提供者為限，只要能形成出徑向地對應於內螺紋之安裝面以供力量感測器設置即可。而且，該安裝面亦不限為平面，例如，第3圖所示之本發明一第二較佳實施例，其中之螺帽60的安裝孔62內具有一為凸面之安裝面622；或者，如第4圖所示之本發明一第三較佳實施例，其中之螺帽70的安裝孔72內具有一為凹面之安裝面722。 However, in the ball screw device provided by the present invention, the position at which the mounting hole of the nut is disposed is not limited to the one provided in the foregoing embodiment, as long as a mounting surface radially corresponding to the internal thread can be formed for strength. The sensor settings are all right. Moreover, the mounting surface is not limited to a flat surface. For example, in a second preferred embodiment of the present invention shown in FIG. 3, the mounting hole 62 of the nut 60 has a convex mounting surface 622 therein; or A third preferred embodiment of the present invention, as shown in FIG. 4, wherein the mounting hole 72 of the nut 70 has a concave mounting surface 722 therein.
值得一提的是，在前述該第二較佳實施例中(如第3圖所示)，該安裝面622的曲率半徑係與該螺帽60之內螺紋64的曲率半徑相等，如此之設計使得該力量感測器50各部位與該內螺紋64的距離皆相等，可得到較佳之感測效果。 It is to be noted that, in the second preferred embodiment (as shown in FIG. 3), the radius of curvature of the mounting surface 622 is equal to the radius of curvature of the internal thread 64 of the nut 60. The distance between each part of the force sensor 50 and the internal thread 64 is equal, and a better sensing effect can be obtained.
最後，必須再次說明，本發明於前揭實施例中所揭露的構成元件，僅為舉例說明，並非用來限制本案之範圍，其他等效元件的替代或變化，亦應為本案之申請專利範圍所涵蓋。 Finally, it is to be noted that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, and alternative or variations of other equivalent elements should also be the scope of the patent application of the present application. Covered.
10‧‧‧滾珠螺桿裝置 10‧‧‧Ball screw device
20‧‧‧螺帽 20‧‧‧ nuts
22‧‧‧穿孔 22‧‧‧Perforation
24‧‧‧內螺紋 24‧‧‧ internal thread
26‧‧‧安裝孔 26‧‧‧Installation holes
262‧‧‧安裝面 262‧‧‧Installation surface
264‧‧‧開口 264‧‧‧ openings
28‧‧‧圓柱面 28‧‧‧ cylindrical surface
30‧‧‧螺桿 30‧‧‧ screw
32‧‧‧外螺紋 32‧‧‧External thread
40‧‧‧滾珠 40‧‧‧ balls
50‧‧‧力量感測器 50‧‧‧Power Sensor
L‧‧‧中心軸線 L‧‧‧ center axis
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102115779A TWI544164B (en) | 2013-05-02 | 2013-05-02 | Ball screw device with pre-pressure sensing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102115779A TWI544164B (en) | 2013-05-02 | 2013-05-02 | Ball screw device with pre-pressure sensing function |
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| Publication Number | Publication Date |
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| TW201443353A true TW201443353A (en) | 2014-11-16 |
| TWI544164B TWI544164B (en) | 2016-08-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10914368B2 (en) | 2018-07-20 | 2021-02-09 | Industrial Technology Research Institute | Ball screw with force sensor in radial direction |
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| TWI664365B (en) * | 2017-12-29 | 2019-07-01 | 財團法人工業技術研究院 | Ball screw with tilt detector |
| CN112096816B (en) * | 2020-09-14 | 2021-09-14 | 山东大学 | Magnetic suspension ball screw pair |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10914368B2 (en) | 2018-07-20 | 2021-02-09 | Industrial Technology Research Institute | Ball screw with force sensor in radial direction |
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