TW201629370A - Feed screw device - Google Patents
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- TW201629370A TW201629370A TW104129044A TW104129044A TW201629370A TW 201629370 A TW201629370 A TW 201629370A TW 104129044 A TW104129044 A TW 104129044A TW 104129044 A TW104129044 A TW 104129044A TW 201629370 A TW201629370 A TW 201629370A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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Abstract
Description
本發明是關於進給螺桿裝置。 The present invention relates to a feed screw device.
進給螺桿裝置具有：螺桿軸；具有螺桿軸插穿，與螺桿軸的螺旋溝槽成面接觸或透過滾動體(滾珠或滾柱)成點接觸的螺旋溝槽的螺帽；及透過軸接頭結合於螺桿軸的軸向一端的馬達，將馬達的旋轉轉換成螺帽的直線運動的裝置。 The feed screw device has: a screw shaft; a nut having a screw shaft inserted through the spiral groove in surface contact with the screw shaft or a spiral groove in contact with the rolling element (ball or roller); and a transmission shaft joint A motor that is coupled to one end of the axial direction of the screw shaft converts the rotation of the motor into a linear motion of the nut.
工作機械等所使用之一般的進給螺桿裝置是例如第10圖表示，具有螺桿軸1的螺旋溝槽11與螺帽2的螺旋溝槽透過滾珠成點接觸的滾珠螺桿進給構造。 A general feed screw device used in a work machine or the like is, for example, a tenth, and a ball screw feed structure in which a spiral groove 11 having a screw shaft 1 and a spiral groove of a nut 2 are in point contact with a ball through a ball.
該進給螺桿裝置100中，螺桿軸1之軸向一端部的馬達側端部12是藉著複數列止推滾珠軸承6與殼體7，以限制軸向位移的狀態自由旋轉地支撐於基台8。並將螺桿軸1的軸向另一端部的逆馬達側端部13是藉著深槽滾珠軸承4與殼體5，以容許軸向位移的狀態自由旋轉地支撐於基台8。 In the feed screw device 100, the motor-side end portion 12 of the one end portion of the screw shaft 1 in the axial direction is supported by the plurality of rows of the thrust ball bearing 6 and the casing 7 so as to be freely rotatably supported in a state in which the axial displacement is restricted. Taiwan 8. The reverse motor side end portion 13 of the other end portion of the screw shaft 1 in the axial direction is rotatably supported by the base 8 by the deep groove ball bearing 4 and the casing 5 so as to permit axial displacement.
在如習知的進給螺桿裝置中，軸向剛性在螺帽的行程 位置(螺帽在直線移動的範圍內的位置)會有大的變化的問題點。 In a conventional feed screw device, the axial rigidity is in the travel of the nut The position (the position of the nut within the range of the linear movement) has a problem of a large change.
為解決此一問題點，專利文獻1提出有兩端支撐進給螺桿(以相對於基台限制軸向位移的狀態自由旋轉地支撐螺桿軸的軸向兩端)，在進給螺桿的兩端(螺桿軸的軸向兩端)分別連結伺服馬達，使伺服馬達彼此同步驅動之進給螺桿的驅動方法。 In order to solve this problem, Patent Document 1 proposes that both ends support a feed screw (freely supporting the axial ends of the screw shaft in a state of axial displacement with respect to the base), at both ends of the feed screw (The axial ends of the screw shaft are respectively connected to the servo motor, and the driving method of the feed screw that drives the servo motors in synchronization with each other.
[專利文獻1]日本特開平10-86027號公報 [Patent Document 1] Japanese Patent Laid-Open No. Hei 10-86027
專利文獻1記載的提案中，由於有在螺桿軸的軸向兩端設置馬達的必要，或有同步驅動馬達用之複雜控制機構的必要等，因此無可避免地在成本上比習知的進給螺桿裝置更高。 In the proposal described in Patent Document 1, since it is necessary to provide a motor at both axial ends of the screw shaft, or to have a complicated control mechanism for synchronously driving the motor, it is inevitable that the cost is higher than the conventional one. Give the screw unit even higher.
本發明的課題是提供與習知的進給螺桿裝置比較不會導致大的成本增加(例如，與習知的進給螺桿裝置成本相同或較低的成本，或與專利文獻1比較低成本)的方法，抑制軸向剛性之行程位置的變化的進給螺桿裝置。 An object of the present invention is to provide a large cost increase as compared with a conventional feed screw device (for example, the same or lower cost as a conventional feed screw device, or a lower cost compared with Patent Document 1) The method of the feed screw device that suppresses the change in the stroke position of the axial rigidity.
為解決上述課題，本發明的第一樣態的進給螺桿裝置，其特徵為：具有下述的構成(1)~(3)。 In order to solve the above problems, the feed screw device of the first aspect of the present invention has the following configurations (1) to (3).
(1)具有：螺桿軸，具有上述螺桿軸插穿，與上述螺桿軸的螺旋溝槽成面接觸或透過滾動體成點接觸的螺旋溝槽的螺帽；及透過軸接頭結合於上述螺桿軸的軸向一端的馬達，將上述馬達的旋轉轉換成上述螺帽的直線運動。 (1) having: a screw shaft having a nut inserted through the screw shaft in a surface contact with the spiral groove of the screw shaft or a spiral groove in contact with the rolling element; and a transmission shaft joint coupled to the screw shaft The motor at one axial end converts the rotation of the motor into a linear motion of the nut.
(2)上述螺桿軸的軸向一端部的馬達側端部是以容許軸向位移的狀態自由旋轉地支撐於上述基台。 (2) The motor-side end portion of the one end portion of the screw shaft in the axial direction is rotatably supported by the base in a state in which the axial displacement is permitted.
(3)上述螺桿軸的軸向另一端部的逆馬達側端部是以限制軸向位移的狀態自由旋轉地支撐於上述基台。 (3) The reverse motor side end portion of the other end portion of the screw shaft in the axial direction is rotatably supported by the base in a state in which the axial displacement is restricted.
本發明的第二樣態的進給螺桿裝置以具有上述構成(1)(3)與下述的構成(4)為特徵。 A feed screw device according to a second aspect of the present invention is characterized by having the above configuration (1) (3) and the following configuration (4).
(4)上述螺桿軸的軸向一端部的馬達側端部未支撐於基台。 (4) The motor side end portion of the one end portion in the axial direction of the screw shaft is not supported by the base.
根據本發明，提供一種與習知的進給螺桿裝置比較不會導致大的成本增加的方法，抑制軸向剛性之行程位置的變化的進給螺桿裝置。 According to the present invention, there is provided a feed screw device which does not cause a large cost increase as compared with a conventional feed screw device and which suppresses a change in the stroke position of the axial rigidity.
1‧‧‧螺桿軸 1‧‧‧Screw shaft
10‧‧‧進給螺桿裝置 10‧‧‧ Feed screw device
10A‧‧‧進給螺桿裝置 10A‧‧‧feed screw unit
10B‧‧‧進給螺桿裝置 10B‧‧‧feed screw device
100‧‧‧進給螺桿裝置 100‧‧‧feed screw device
11‧‧‧螺桿軸的螺旋溝槽 11‧‧‧Spiral groove of the screw shaft
12‧‧‧螺桿軸的軸向一端(馬達側端部) 12‧‧‧Axis end of the screw shaft (motor side end)
13‧‧‧螺桿軸的軸向另一端(逆馬達側端部) 13‧‧‧The other end of the screw shaft in the axial direction (reverse motor side end)
15‧‧‧工作台 15‧‧‧Workbench
2‧‧‧螺帽 2‧‧‧ nuts
20‧‧‧工作機械 20‧‧‧Working machinery
3‧‧‧馬達 3‧‧‧Motor
31‧‧‧軸接頭 31‧‧‧ shaft joint
32‧‧‧殼體 32‧‧‧ housing
34‧‧‧導軌 34‧‧‧rails
35‧‧‧滑塊 35‧‧‧ Slider
4‧‧‧深槽滾珠軸承 4‧‧‧Deep groove ball bearing
40‧‧‧複數列深槽滾珠軸承 40‧‧‧Multiple row deep groove ball bearings
5‧‧‧殼體 5‧‧‧Shell
50‧‧‧殼體 50‧‧‧shell
6‧‧‧DF型的複數列止推滾珠軸承 6‧‧‧DF type multi-column thrust ball bearing
60‧‧‧DB型的複數列止推滾珠軸承 60‧‧‧DB type complex row thrust ball bearing
7‧‧‧殼體 7‧‧‧Shell
8‧‧‧基台 8‧‧‧Abutment
9‧‧‧托架 9‧‧‧ bracket
91‧‧‧圓筒部 91‧‧‧Cylinder
92‧‧‧工作台安裝部 92‧‧‧Workbench installation
第1圖是表示第一實施形態之進給螺桿裝置的概略構成圖。 Fig. 1 is a schematic configuration view showing a feed screw device according to the first embodiment.
第2圖是表示具有進給螺桿裝置之工作機械的上視圖。 Fig. 2 is a top view showing a work machine having a feed screw device.
第3圖是針對第1圖的進給螺桿裝置，表示軸向位移及軸向剛性與行程位置的關係的圖表。 Fig. 3 is a graph showing the relationship between the axial displacement and the axial rigidity and the stroke position with respect to the feed screw device of Fig. 1.
第4圖是比較實施形態之進給螺桿裝置的行程位置的軸向剛性的變化(G1)與習知的進給螺桿裝置的行程位置的軸向剛性的變化(G2)的圖表。 Fig. 4 is a graph comparing the change in the axial rigidity (G1) of the stroke position of the feed screw device of the embodiment with the change in the axial rigidity (G2) of the stroke position of the conventional feed screw device.
第5圖是表示第3圖表示之位移的剛性(Gc)與(d)之位移的剛性(Gd)的比(Gd/Gc)成為0.4以上1.6以下的範圍之螺桿軸的外徑與導程的關係的圖表。 Fig. 5 is a view showing the outer diameter and the lead of the screw shaft in which the ratio (Gd/Gc) of the displacement (Gc) of the displacement shown in Fig. 3 to the rigidity (Gd) of the displacement of (d) is 0.4 or more and 1.6 or less. Diagram of the relationship.
第6圖是表示第二實施形態的進給螺桿裝置(構成第2圖的工作機械之進給螺桿裝置的一例)的側視圖。 Fig. 6 is a side view showing a feed screw device (an example of a feed screw device constituting the machine tool of Fig. 2) according to the second embodiment.
第7圖是表示第三實施形態的進給螺桿裝置(構成第2圖的工作機械之進給螺桿裝置的一例)的側視圖。 Fig. 7 is a side view showing a feed screw device (an example of a feed screw device constituting the machine tool of Fig. 2) according to the third embodiment.
第8圖是表示構成第三實施形態的進給螺桿裝置之支撐馬達側端部的軸承的一例的剖視圖。 Fig. 8 is a cross-sectional view showing an example of a bearing that supports the motor-side end portion of the feed screw device of the third embodiment.
第9圖是表示構成第三實施形態的進給螺桿裝置之支撐馬達側端部的軸承的一例的剖視圖。 Fig. 9 is a cross-sectional view showing an example of a bearing that supports the motor-side end portion of the feed screw device of the third embodiment.
第10圖是表示習知進給螺桿裝置的概略構成圖。 Fig. 10 is a schematic block diagram showing a conventional feed screw device.
第11圖是針對第10圖的進給螺桿裝置，表示軸向位移及軸向剛性與行程位置的關係的圖表。 Fig. 11 is a graph showing the relationship between the axial displacement and the axial rigidity and the stroke position with respect to the feed screw device of Fig. 10.
以下，雖針對本發明的實施形態說明，但本 發明不為該實施形態所限定。以下表示的實施形態中，為實施本發明雖以較佳之技術予以限定，但此一限定並非為本發明之必備要件。 Hereinafter, the embodiments of the present invention will be described, but The invention is not limited by the embodiment. In the embodiments shown below, the present invention is limited by the preferred techniques, but this limitation is not an essential requirement of the present invention.
如第1圖表示，該實施形態的進給螺桿裝置10具有：螺桿軸1、螺帽2、馬達3、深槽滾珠軸承4、深槽滾珠軸承4的殼體5、複數列止推滾珠軸承6及複數列止推滾珠軸承6的殼體7。該進給螺桿裝置10，具有螺桿軸1插穿於螺帽2，螺桿軸1的螺旋溝槽11與螺帽2的螺旋溝槽透過滾珠(滾動體)成點接觸的滾珠進給螺桿構造。 As shown in Fig. 1, the feed screw device 10 of this embodiment has a screw shaft 1, a nut 2, a motor 3, a deep groove ball bearing 4, a housing 5 of a deep groove ball bearing 4, and a plurality of rows of thrust ball bearings. 6 and a plurality of rows of housings 7 of the thrust ball bearing 6. The feed screw device 10 has a screw shaft 1 inserted through the nut 2, and the spiral groove 11 of the screw shaft 1 and the spiral groove of the nut 2 are in point contact with a ball (rolling element) in a ball feed screw configuration.
在螺桿軸1的軸向一端，透過軸接頭31結合有馬達3。軸接頭31是具有可吸收螺桿軸1之軸向位移的構造。作為軸接頭31可例示如板簧式聯軸器、十字滑塊聯軸器(在中間體的突出部及與此嵌合的溝槽之間設置軸向間隙的設置)、鍵固定後的剛性聯軸器。藉軸接頭31的螺桿軸1與馬達3的結合部份是配置在固定於基台8的殼體32內。 At the axial end of the screw shaft 1, a motor 3 is coupled to the transmission shaft joint 31. The shaft joint 31 is configured to absorb the axial displacement of the screw shaft 1. As the shaft joint 31, for example, a leaf spring type coupling, a cross slide coupling (an arrangement in which an axial gap is provided between a protruding portion of an intermediate body and a groove fitted thereto), and rigidity after key fixing can be exemplified. Coupling. The joint portion of the screw shaft 1 and the motor 3 of the shaft joint 31 is disposed in the casing 32 fixed to the base 8.
深槽滾珠軸承4的內圈是被固定在螺桿軸1的軸向一端部的馬達側端部12，固定深槽滾珠軸承4的外圈的殼體5的下部被固定於基台8。藉此，螺桿1的馬達側端部12是以容許軸向位移的狀態自由旋轉地被支撐於基台8。 The inner ring of the deep groove ball bearing 4 is a motor side end portion 12 fixed to one end portion of the screw shaft 1 in the axial direction, and the lower portion of the casing 5 that fixes the outer ring of the deep groove ball bearing 4 is fixed to the base 8. Thereby, the motor side end portion 12 of the screw 1 is rotatably supported by the base 8 in a state in which the axial displacement is allowed.
複數列止推滾珠軸承6是由DF型(正面組合)組合的 兩個止推滾珠軸承所構成。殼體7具有限制複數列止推滾珠軸承6的外圈之軸向端面的肩部。複數列止推滾珠軸承6的內圈是固定於螺桿1的軸向另一端部之逆馬達端部13，固定複數列止推滾珠軸承6的外圈的殼體7的下部是被固定在基台8。藉此，以限制軸向位移的狀態將螺桿軸1的逆馬達側端部13自由旋轉地支撐於基台8。 The multi-column thrust ball bearing 6 is a combination of DF type (front combination) Two thrust ball bearings are formed. The housing 7 has a shoulder that limits the axial end faces of the outer rings of the plurality of rows of thrust ball bearings 6. The inner ring of the plurality of rows of thrust ball bearings 6 is a reverse motor end portion 13 fixed to the other axial end portion of the screw 1, and the lower portion of the casing 7 that fixes the outer ring of the plurality of rows of thrust ball bearings 6 is fixed to the base. Taiwan 8. Thereby, the counter motor side end portion 13 of the screw shaft 1 is rotatably supported by the base 8 in a state where the axial displacement is restricted.
該進給螺桿裝置10是例如在第2圖表示的工作機械20中，作為往返移動工作台15的移動機構使用。第2圖表示的工作機械20具有引導工作台15往返移動的一對線性引導裝置。各線性引導裝置具有導軌34與兩個滑塊35。 This feed screw device 10 is used as a moving mechanism of the reciprocating table 15, for example, in the machine tool 20 shown in Fig. 2 . The work machine 20 shown in Fig. 2 has a pair of linear guides that guide the table 15 to reciprocate. Each linear guiding device has a guide rail 34 and two sliders 35.
因此，如第1圖表示，在進給螺桿裝置10的螺帽2透過具有圓筒部91與在圓筒部91的徑向延伸的工作台安裝部92的托架9，固定工作台15。使工作台安裝部92朝向基台8的相反側，將托架9的圓筒部91嵌合於螺帽2的外側，在工作台安裝部92固定工作台15。 Therefore, as shown in Fig. 1, the nut 2 of the feed screw device 10 passes through the bracket 9 having the cylindrical portion 91 and the table mounting portion 92 extending in the radial direction of the cylindrical portion 91, and the table 15 is fixed. The table mounting portion 92 is directed to the opposite side of the base 8, and the cylindrical portion 91 of the bracket 9 is fitted to the outside of the nut 2, and the table 15 is fixed to the table mounting portion 92.
以預定的控制程式驅動馬達3，藉此旋轉螺桿軸1，並藉滾珠螺桿機構使得螺帽2在行程範圍內往返直線運動。伴隨此，工作台15沿著螺桿軸1往返移動，各線性引導裝置引導工作台15的往返移動。 The motor 3 is driven by a predetermined control program, whereby the screw shaft 1 is rotated, and the nut 2 is moved linearly in the stroke range by the ball screw mechanism. Along with this, the table 15 reciprocates along the screw shaft 1, and each linear guide guides the reciprocating movement of the table 15.
進給螺桿裝置的傳動系整體的軸向剛性是依據構成傳動系之零組件的軸向位移的和來決定。構成零組件的位移 有(a)固定軸承的軸向位移；(b)伴隨作用於螺帽與螺桿軸之間的力的螺帽的軸向位移；(c)壓縮力或拉張力作用於螺桿軸產生的螺桿軸的軸向位移；(d)伴隨著螺桿軸的扭轉變形之螺帽的軸向位移。 The overall axial stiffness of the drive train of the feed screw assembly is determined by the sum of the axial displacements of the components that make up the drive train. The displacement that constitutes the component There are (a) axial displacement of the fixed bearing; (b) axial displacement of the nut accompanying the force acting between the nut and the screw shaft; (c) compression force or tension acting on the screw shaft generated by the screw shaft Axial displacement; (d) axial displacement of the nut with torsional deformation of the screw shaft.
(d)的位移是在螺桿軸未旋轉的狀態軸向負載施加於固定在螺帽的工作台的場合，伴隨著螺桿軸受來自螺帽的扭矩而扭轉變形在螺帽產生的軸向位移。 The displacement of (d) is a case where the axial load is applied to the table fixed to the nut when the screw shaft is not rotated, and the axial displacement of the screw shaft due to the torque from the nut is torsionally deformed in the nut.
在此，調查對第1圖的進給螺桿裝置10，施加10kN的軸向負載的場合的(a)~(d)的軸向位移及軸向剛性與行程位置的關係。進給螺桿裝置10的構成是螺桿軸1的外徑為40mm且導程為40mm；螺帽2的行程為1000mm；深槽滾珠軸承4為日本精工(股)的型號6206(容許徑向負載19500N、容許轉數7500rpm)；複數列止推滾珠軸承6為同型號30TAC62B(容許徑向負載43000N、容許轉數3000rpm)。 Here, the relationship between the axial displacement and the axial rigidity of (a) to (d) and the stroke position when the axial load of 10 kN is applied to the feed screw device 10 of Fig. 1 is investigated. The feed screw device 10 is constructed such that the outer diameter of the screw shaft 1 is 40 mm and the lead length is 40 mm; the stroke of the nut 2 is 1000 mm; and the deep groove ball bearing 4 is a model 6206 of Japan Seiko Co., Ltd. (allowing radial load 19500 N) The allowable number of revolutions is 7500 rpm); the plurality of thrust ball bearings 6 are the same type 30TAC62B (allowing radial load 43000 N, allowable number of revolutions 3000 rpm).
其結果表示於第3圖。第3圖的行程位置是表示設逆馬達側(第1圖的左側)的行程端為「0」，設馬達側(第1圖的右側)的行程端為「1」的相對位置。 The result is shown in Fig. 3. The stroke position in Fig. 3 indicates that the stroke end of the reverse motor side (the left side of Fig. 1) is "0", and the stroke end of the motor side (the right side of Fig. 1) is "1".
如第3圖表示，(a)及(b)的軸向位移雖是在全行程範圍分別為10μm左右一定的範圍，但(c)的軸向位移則是左端為0隨著向右成直線增加而在右端成為最大的52μm左右。(d)的軸向位移為左端52μm左右成為最大，隨著向右成直線減少而在右端成為最小的15μm左右。又，構成零組件之軸向位移的和在左端為72μm左右，右 端成為87μm左右，其差為5μm左右。 As shown in Fig. 3, the axial displacements of (a) and (b) are in a range of about 10 μm in the full stroke range, but the axial displacement in (c) is 0 in the left end and straight in the right direction. Increase and become the largest 52μm at the right end. The axial displacement of (d) is about 52 μm at the left end, and becomes the largest at about 15 μm at the right end as the line decreases to the right. Moreover, the sum of the axial displacements constituting the components is about 72 μm at the left end, right The end was about 87 μm, and the difference was about 5 μm.
第3圖的線G1是表示行程範圍的軸向剛性的變化。顯示G1時，軸向剛性的最低值為116N/μm，最大值為140N/μm左右，軸向剛性之行程範圍的變化量是成為24N/μm左右。 The line G1 in Fig. 3 is a change in the axial rigidity indicating the stroke range. When G1 is displayed, the minimum value of the axial rigidity is 116 N/μm, the maximum value is about 140 N/μm, and the amount of change in the stroke range of the axial rigidity is about 24 N/μm.
作為比較例，調查與第10圖表示之習知進給螺桿裝置100相同條件的(a)~(d)的軸向位移及軸向剛性與行程位置的關係，將其結果表示於第11圖。 As a comparative example, the relationship between the axial displacement and the axial rigidity of (a) to (d) and the stroke position under the same conditions as those of the conventional feed screw device 100 shown in Fig. 10 was examined, and the results are shown in Fig. 11. .
第10圖表示的習知進給螺桿裝置100中，如第11圖表示，(a)~(c)的軸向位移雖是與第2圖相同，但(d)的軸向位移則是左端為最小的15μm左右，隨著向右成直線增加而在右端成為最大的52μm左右。並且，構成零組件之軸向位移的和在左端為34μm左右，右端成為124μm左右，其差較大為90μm左右。 In the conventional feed screw device 100 shown in Fig. 10, as shown in Fig. 11, the axial displacement of (a) to (c) is the same as that of Fig. 2, but the axial displacement of (d) is the left end. It is about 15 μm which is the smallest at the right end as the line increases to the right. Further, the sum of the axial displacements of the components is about 34 μm at the left end, and the right end is about 124 μm, and the difference is about 90 μm.
第11圖的線G2是表示行程範圍的軸向剛性的變化。顯示G2時，軸向剛性的最低值為83N/μm，最大值為290N/μm左右，軸向剛性之行程範圍的變化量是成為207N/μm左右。第4的圖表中，可比較線G1與線G2。 The line G2 of Fig. 11 is a change indicating the axial rigidity of the stroke range. When G2 is displayed, the minimum value of the axial rigidity is 83 N/μm, the maximum value is about 290 N/μm, and the amount of change in the stroke range of the axial rigidity is about 207 N/μm. In the fourth graph, the line G1 and the line G2 can be compared.
從以上說明，第1圖表示的第一實施形態的進給螺桿裝置10與第10圖表示之習知的進給螺桿裝置100比較，可得知軸向剛性的行程位置的變化不但變小，且軸向剛性的最低值變大。 As described above, the feed screw device 10 of the first embodiment shown in Fig. 1 is compared with the conventional feed screw device 100 shown in Fig. 10, and it can be seen that the change in the axial rigidity of the stroke position is not small. And the minimum value of the axial rigidity becomes large.
又，如第1圖表示的進給螺桿裝置10是以和 第10圖表示之進給螺桿裝置100相同的構成零組件所構成，在馬達側與逆馬達側相反設置軸承及殼體，因此可以和習知進給螺桿裝置100相同的成本獲得。 Further, the feed screw device 10 shown in Fig. 1 is and Fig. 10 shows the same constituent components of the feed screw device 100, and the bearing and the casing are provided opposite to the reverse motor side on the motor side, so that it can be obtained at the same cost as the conventional feed screw device 100.
並且，第3圖的結果雖是使用外徑與導程相同之螺桿軸時的結果，但是以(c)的位移決定的剛性是對應螺桿軸的外徑而變化，(d)的位移決定的剛性是對應螺桿軸的外徑與導程而變化。可得知(d)之位移的剛性Gd只要在(c)的位移之剛性Gc的0.4倍以上1.6倍以下的範圍，即具有抑制軸向剛性之行程位置的變化的高的效果。計算剛性的比(Gd/Gc)成為0.4以上1.6以下的範圍之螺桿軸的外徑(A)與導程(L)的關係。 Further, although the result of Fig. 3 is a result of using a screw shaft having the same outer diameter and the lead, the rigidity determined by the displacement of (c) is changed corresponding to the outer diameter of the screw shaft, and the displacement of (d) is determined. The rigidity varies depending on the outer diameter and the lead of the screw shaft. It is understood that the rigidity Gd of the displacement of (d) is in a range of 0.4 times or more and 1.6 times or less of the rigidity Gc of the displacement of (c), that is, a high effect of suppressing a change in the stroke position of the axial rigidity. The relationship between the outer diameter (A) of the screw shaft and the lead (L) in which the ratio (Gd/Gc) of the rigidity is 0.4 or more and 1.6 or less is calculated.
其結果，在螺桿軸的外徑(A)與導程(L)的關係滿足0.4≦Gd/Gc≦1.6的範圍，在第5圖的圖表，可得知成為L=αA的線(α=0.86)上及L=βA的線(β=1.75)上的關係，及成為兩線之間的範圍的關係。因此，只要螺桿軸的導程(L)與螺桿軸的外徑(A)的關係是滿足下述的(1)式的進給螺桿裝置，即具有高的抑制軸向剛性的行程位置之變化的效果。 As a result, the relationship between the outer diameter (A) of the screw shaft and the lead (L) satisfies the range of 0.4 ≦ Gd / Gc ≦ 1.6, and in the graph of Fig. 5, the line which becomes L = αA (α = 0.86) The relationship between the line above L=βA (β=1.75) and the relationship between the two lines. Therefore, as long as the relationship between the lead (L) of the screw shaft and the outer diameter (A) of the screw shaft is a feed screw device that satisfies the following formula (1), that is, a change in stroke position with high axial rigidity suppression Effect.
0.86A≦L≦1.75A…(1) 0.86A≦L≦1.75A...(1)
第6圖表示的進給螺桿裝置10A是構成第2圖的工作機械的進給螺桿裝置，具有：螺桿軸1、螺帽2、馬達 3、殼體7及配置在殼體7與螺桿軸1之間的軸承。該進給螺桿裝置10A具有螺桿軸1插穿螺帽2，使螺桿軸1的螺旋溝槽與螺帽2的螺旋溝槽透過滾珠(滾動體)成點接觸的滾珠螺桿進給構造。在螺桿軸1的軸向一端透過軸承接頭31結合有馬達3。 The feed screw device 10A shown in Fig. 6 is a feed screw device constituting the machine tool of Fig. 2, and has a screw shaft 1, a nut 2, and a motor. 3. A housing 7 and a bearing disposed between the housing 7 and the screw shaft 1. The feed screw device 10A has a ball screw feed structure in which the screw shaft 1 is inserted through the nut 2 so that the spiral groove of the screw shaft 1 and the spiral groove of the nut 2 pass through the balls (rolling elements) in point contact. A motor 3 is coupled to the axial end of the screw shaft 1 through a bearing joint 31.
在螺桿軸1的軸向一端部的馬達側端部12與基台8之間，未設有軸承及殼體。亦即，螺桿軸1的馬達側端部12未支撐於基台8。螺桿軸1的軸向另一端部的逆馬達側端部13是與第1圖的進給螺桿裝置10同樣，藉著複數列止推滾珠軸承6及具有限制其外圈的軸向端面的肩部的殼體7，以限制軸向位移的狀態自由旋轉地支撐於基台8。 A bearing and a casing are not provided between the motor side end portion 12 at one end portion of the screw shaft 1 in the axial direction and the base 8. That is, the motor side end portion 12 of the screw shaft 1 is not supported by the base 8. The reverse motor side end portion 13 of the other end portion of the screw shaft 1 in the axial direction is the same as the feed screw device 10 of Fig. 1, and the thrust ball bearing 6 and the shoulder having the axial end face of the outer ring are limited by the plurality of rows. The casing 7 of the portion is rotatably supported by the base 8 in a state in which the axial displacement is restricted.
因此，第二實施形態的進給螺桿裝置10A與第10圖表示的習知的進給螺桿裝置100比較，軸向剛性之行程位置的變化會變小，且軸向剛性的最低值會變大。 Therefore, in the feed screw device 10A of the second embodiment, as compared with the conventional feed screw device 100 shown in Fig. 10, the change in the stroke position of the axial rigidity becomes small, and the minimum value of the axial rigidity becomes large. .
又，第二實施形態的進給螺桿裝置10A不需要支撐螺桿軸1的馬達側端部12的軸承及殼體，因此可以較第10圖表示之進給螺桿裝置100低的成本獲得。 Further, since the feed screw device 10A of the second embodiment does not need to support the bearing and the casing of the motor-side end portion 12 of the screw shaft 1, it can be obtained at a lower cost than the feed screw device 100 shown in Fig. 10.
第7圖表示的進給螺桿裝置10B為構成第2圖的工作機械的進給螺桿裝置，具有：螺桿軸1、螺帽2、馬達3、殼體7、50及配置在殼體7、50與螺桿軸1之間的各軸承。該進給螺桿裝置10B具有螺桿軸1插穿螺帽2，使 螺桿軸1的螺旋溝槽與螺帽2的螺旋溝槽透過滾珠(滾動體)成點接觸的滾珠螺桿進給構造。在螺桿軸1的軸向一端透過軸承接頭31結合有馬達3。 The feed screw device 10B shown in Fig. 7 is a feed screw device constituting the machine tool of Fig. 2, and has a screw shaft 1, a nut 2, a motor 3, housings 7, 50, and a housing 7 and 50. Each bearing between the screw shaft 1 and the shaft. The feed screw device 10B has a screw shaft 1 inserted through the nut 2 so that The spiral groove of the screw shaft 1 and the spiral groove of the nut 2 are in a point of contact with the ball (rolling body) in a ball screw feeding configuration. A motor 3 is coupled to the axial end of the screw shaft 1 through a bearing joint 31.
螺桿軸1的軸向一端部的馬達側端部12是藉著複數列的滾珠軸承與其殼體50，以容許軸向位移的狀態自由旋轉地支撐於基台8。作為複數列的滾珠軸承的具體例，可例示以第8圖表示的DB型(背面組合型)組合的兩個止推滾珠軸承所構成的複數列止推滾珠軸承60，及第9圖表示的兩個深槽滾珠軸承40。殼體50不具有限制複數列止推軸承60的外圈之軸向端面的肩部。 The motor-side end portion 12 of the one end portion of the screw shaft 1 in the axial direction is rotatably supported by the base 8 by a plurality of ball bearings and its casing 50 so as to permit axial displacement. Specific examples of the ball bearing of the plurality of rows include a plurality of thrust thrust ball bearings 60 composed of two thrust ball bearings of the DB type (back combination type) shown in Fig. 8, and Fig. 9 Two deep groove ball bearings 40. The housing 50 does not have a shoulder that limits the axial end faces of the outer rings of the plurality of rows of thrust bearings 60.
螺桿軸1的軸向另一端部的逆馬達側端部13是與第1圖的進給螺桿裝置10同樣，藉著複數列止推滾珠軸承6及具有限制其外圈的軸向端面的肩部的殼體7，以限制軸向位移的狀態自由旋轉地支撐於基台8。 The reverse motor side end portion 13 of the other end portion of the screw shaft 1 in the axial direction is the same as the feed screw device 10 of Fig. 1, and the thrust ball bearing 6 and the shoulder having the axial end face of the outer ring are limited by the plurality of rows. The casing 7 of the portion is rotatably supported by the base 8 in a state in which the axial displacement is restricted.
因此，第三實施形態的進給螺桿裝置10B與第10圖表示的習知的進給螺桿裝置100比較，軸向剛性之行程位置的變化會變小，且軸向剛性的最低值會變大。 Therefore, in the feed screw device 10B of the third embodiment, as compared with the conventional feed screw device 100 shown in Fig. 10, the change in the stroke position of the axial rigidity becomes small, and the minimum value of the axial rigidity becomes large. .
又，螺桿軸1的馬達側端部12在以一個深槽滾珠軸承4支撐的第一實施形態的進給螺桿裝置10，及不以軸承支撐的第二實施形態的進給螺桿裝置10A中，馬達3的振動容易傳播至傳動系。相對於此，第三實施形態的進給螺桿裝置10B是以複數列的滾珠軸承支撐螺桿軸1的馬達側端部12，可藉此防止馬達3的振動傳播至傳動系。 Further, the motor side end portion 12 of the screw shaft 1 is supported by the feed screw device 10 of the first embodiment supported by the one deep groove ball bearing 4, and the feed screw device 10A of the second embodiment which is not supported by the bearing. The vibration of the motor 3 is easily transmitted to the drive train. On the other hand, the feed screw device 10B of the third embodiment supports the motor-side end portion 12 of the screw shaft 1 with a plurality of ball bearings, whereby the vibration of the motor 3 can be prevented from propagating to the drive train.
另外，第三實施形態的進給螺桿裝置10B相對於第 10圖表示的進給螺桿裝置100可以僅些微成本的增加獲得，較專利文獻1的方法獲得的進給螺桿裝置以更低成本獲得。 Further, the feed screw device 10B of the third embodiment is relative to the first The feed screw device 100 shown in Fig. 10 can be obtained with only a slight increase in cost, and the feed screw device obtained by the method of Patent Document 1 is obtained at a lower cost.
第一樣態的進給螺桿裝置具有上述構成(1)~(3)，與習知的進給螺桿裝置比較，抑制軸向剛性的行程位置的變化。且該進給螺桿裝置是使用與習知的進給螺桿裝置相同的構成零組件，可以將習知的進給螺桿裝置的螺桿軸相對於馬達側端部之基台的支撐狀態與相對於逆馬達側端部之基台的支撐狀態相反組裝而獲得。 The feed screw device of the first state has the above-described configurations (1) to (3), and the change in the stroke position of the axial rigidity is suppressed as compared with the conventional feed screw device. And the feed screw device uses the same constituent components as the conventional feed screw device, and the support state of the screw shaft of the conventional feed screw device relative to the base of the motor side end can be reversed The support state of the base of the motor side end portion is obtained by assembling it in reverse.
第二樣態的進給螺桿裝置具有上述構成(1)(3)(4)，與習知的進給螺桿裝置比較，抑制軸向剛性的行程位置的變化。且該進給螺桿裝置，由於不需要支撐結合馬達一側的零組件，因此較習知的進給螺桿裝置可以更低的成本獲得。 The feed screw device of the second aspect has the above-described configurations (1), (3) and (4), and changes in the stroke position of the axial rigidity are suppressed as compared with the conventional feed screw device. Moreover, since the feed screw device does not need to support the components on the side of the motor, the conventional feed screw device can be obtained at a lower cost.
第一樣態及第二樣態的進給螺桿裝置，可具有下述的構成(5)或(6)。 The feed screw device of the first state and the second state may have the following configuration (5) or (6).
(5)上述螺桿軸的導程(L)與螺桿軸的外徑(A)的關係滿足下述的(1)式。 (5) The relationship between the lead (L) of the screw shaft and the outer diameter (A) of the screw shaft satisfies the following formula (1).
0.86A≦L≦1.75A…(1) 0.86A≦L≦1.75A...(1)
(6)上述軸接頭具有可吸收上述螺桿軸的軸向位移的構造。 (6) The above-mentioned shaft joint has a structure that can absorb the axial displacement of the above-mentioned screw shaft.
1‧‧‧螺桿軸 1‧‧‧Screw shaft
2‧‧‧螺帽 2‧‧‧ nuts
3‧‧‧馬達 3‧‧‧Motor
4‧‧‧深槽滾珠軸承 4‧‧‧Deep groove ball bearing
5‧‧‧殼體 5‧‧‧Shell
6‧‧‧DF型的複數列止推滾珠軸承 6‧‧‧DF type multi-column thrust ball bearing
7‧‧‧殼體 7‧‧‧Shell
8‧‧‧基台 8‧‧‧Abutment
9‧‧‧托架 9‧‧‧ bracket
10‧‧‧進給螺桿裝置 10‧‧‧ Feed screw device
11‧‧‧螺桿軸的螺旋溝槽 11‧‧‧Spiral groove of the screw shaft
12‧‧‧螺桿軸的軸向一端(馬達側端部) 12‧‧‧Axis end of the screw shaft (motor side end)
13‧‧‧螺桿軸的軸向另一端(逆馬達側端部) 13‧‧‧The other end of the screw shaft in the axial direction (reverse motor side end)
15‧‧‧工作台 15‧‧‧Workbench
31‧‧‧軸接頭 31‧‧‧ shaft joint
32‧‧‧殼體 32‧‧‧ housing
91‧‧‧圓筒部 91‧‧‧Cylinder
92‧‧‧工作台安裝部 92‧‧‧Workbench installation
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014179198A JP6007953B2 (en) | 2014-09-03 | 2014-09-03 | Method for suppressing change in axial rigidity of feed screw device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW201629370A true TW201629370A (en) | 2016-08-16 |
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ID=55439364
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104129044A TW201629370A (en) | 2014-09-03 | 2015-09-02 | Feed screw device |
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| Country | Link |
|---|---|
| JP (1) | JP6007953B2 (en) |
| TW (1) | TW201629370A (en) |
| WO (1) | WO2016035275A1 (en) |
Cited By (2)
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| CN113357610A (en) * | 2020-03-06 | 2021-09-07 | Zkw集团有限责任公司 | Adjusting device for adjusting an optically relevant structural unit of a motor vehicle headlight |
| CN115023303A (en) * | 2020-01-21 | 2022-09-06 | 格拉齐奥利切萨雷责任有限公司 | Conveying machine |
Families Citing this family (2)
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| PL3298996T3 (en) * | 2015-05-20 | 2023-08-28 | Nichiban Company Limited | Adhesive skin patch material, and support for adhesive skin patch material which can be used in same |
| CN108380939A (en) * | 2018-05-15 | 2018-08-10 | 浙江屹立机器人科技有限公司 | A kind of transmission mechanism of oblique lathe bed set class puncher |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08276341A (en) * | 1995-04-07 | 1996-10-22 | Toshiba Mach Co Ltd | Spindle feeding device of machine tool |
| JP2004257502A (en) * | 2003-02-27 | 2004-09-16 | Ntn Corp | Ball screw |
| JP3137802U (en) * | 2007-05-24 | 2007-12-13 | 稔 中村 | Slider |
| JP5434123B2 (en) * | 2009-02-18 | 2014-03-05 | 日本精工株式会社 | Ball screw |
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|---|---|---|---|---|
| CN115023303A (en) * | 2020-01-21 | 2022-09-06 | 格拉齐奥利切萨雷责任有限公司 | Conveying machine |
| CN113357610A (en) * | 2020-03-06 | 2021-09-07 | Zkw集团有限责任公司 | Adjusting device for adjusting an optically relevant structural unit of a motor vehicle headlight |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6007953B2 (en) | 2016-10-19 |
| WO2016035275A1 (en) | 2016-03-10 |
| JP2016053386A (en) | 2016-04-14 |
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