TWM474840U

TWM474840U - Ball screw with dual circulation structure

Info

Publication number: TWM474840U
Application number: TW102223150U
Authority: TW
Inventors: Shang-Hua Tsai; Szu-Wei Yu
Original assignee: Hiwin Tech Corp
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-03-21

Description

Ball screw with double cycle structure

　　本創作係為一種線性傳動元件，尤指一種具雙循環結構之滾珠螺桿。This creation is a linear transmission element, especially a ball screw with a double cycle structure.

　　誠如台灣公告第I281969號專利，係揭露一種具雙循環結構之滾珠螺桿，其藉由一迴流裝置及兩端塞構成兩獨立的循環結構，達到端塞式螺帽上可形成至少兩個獨立滾珠循環迴圈，使螺帽在可形成多道滾珠循環，而可使用偏位預壓方式調整螺帽之預壓力。然而，此種設計型式因為該迴流裝置係由螺帽外徑上開設一徑向孔槽供其設置，因為迴流裝置必須預留較厚的肉厚以供螺絲穿設承靠鎖固於螺帽，相對螺帽因為該徑向孔槽的設置也需增加外徑尺寸以配合該迴流裝置，故會因此增加了該螺帽的外徑尺寸，而失去原本端塞式螺帽具有較小外徑的優點，故實有改良精進之必要。As disclosed in Taiwan Patent No. I281969, a ball screw having a double-cycle structure is disclosed, which comprises two recirculating devices and two end plugs to form two independent circulating structures, so that at least two independent bodies can be formed on the end plug nut. The ball loops back, so that the nut can form multiple ball cycles, and the pre-pressure of the nut can be adjusted by the bias preloading method. However, this type of design is because the reflow device is provided with a radial hole for the outer diameter of the nut, because the reflow device must reserve a thicker thickness for the screw to be anchored to the nut. Because the radial nut slot is also required to increase the outer diameter dimension to match the reflow device, the outer diameter of the nut is increased, and the original end plug nut has a smaller outer diameter. The advantages, therefore, the need for improved and refined.

　　有鑑於上述問題，本創作主要目的在於：設計一種外塞式及端塞式所構成的雙循環結構之滾珠螺桿的螺帽之外徑尺寸，具有與端塞式螺帽之外徑尺寸相近的優勢。In view of the above problems, the main purpose of the present invention is to design an outer diameter of a nut of a ball screw having a double-cycle structure of an outer plug type and an end plug type, which has a similar outer diameter to that of the end plug nut. Advantage.

　　為達成上述之目的，本創作係為一種具雙循環結構之滾珠螺桿，係包含：一長軸，係沿一方向伸長為長條狀結構，該長軸之外緣面設有螺旋狀之滾動溝；一螺帽，係設有供該長軸穿設之穿孔，該穿孔之內緣面設有相對該滾動溝之滾動槽，該滾動溝與滾動槽係構成一負荷路徑，該螺帽更設有兩迴流路徑，兩該迴流路徑係分別與該負荷路徑銜接後構成兩運行路徑，該運行路徑係設有複數滾動件；其中該迴流路徑具有兩迴轉道，兩該迴轉道具有一迴轉半徑，兩該迴轉半徑係不相等。In order to achieve the above object, the present invention is a ball screw having a double-cycle structure, comprising: a long axis extending in a direction into a strip-like structure, the outer edge of the long axis being provided with a spiral rolling a groove, the nut is provided with a perforation for the long shaft, and the inner edge surface of the perforation is provided with a rolling groove opposite to the rolling groove, the rolling groove and the rolling groove form a load path, and the nut further comprises a load path Two return paths are provided, and the two return paths are respectively connected with the load path to form two running paths, wherein the running path is provided with a plurality of rolling elements; wherein the return path has two turning lanes, and the two rotating props have a radius of gyration. The two radii of radii are not equal.

　　較佳的，該迴流路徑係由一端塞及一外塞構成，該端塞係設置於該螺帽所設之端部安裝槽，該外塞係設置於該螺帽所設之徑向安裝槽，該徑向安裝槽與該端部安裝槽之間係由一迴流孔連接，使得該端塞及外塞所設之迴轉道之一端分別與該迴流孔之兩端銜接而構成該迴流路徑。Preferably, the return path is formed by an end plug and an outer plug. The end plug is disposed at an end mounting groove of the nut, and the outer plug is disposed on the radial mounting groove of the nut. The radial mounting groove and the end mounting groove are connected by a return hole, so that one end of the rotating channel provided by the end plug and the outer plug respectively engages with both ends of the return hole to form the return path.

　　較佳的，該外塞之迴轉半徑係小於該端塞之迴轉半徑。Preferably, the radius of gyration of the outer plug is smaller than the radius of gyration of the end plug.

1‧‧‧長軸
11‧‧‧滾動溝
2‧‧‧螺帽
21‧‧‧穿孔
211‧‧‧滾動槽
90‧‧‧負荷路徑
212‧‧‧端部安裝槽
22‧‧‧徑向安裝槽
23‧‧‧迴流孔
3‧‧‧端塞
31‧‧‧迴轉道
4‧‧‧外塞
41‧‧‧迴轉道
R1、R2‧‧‧迴轉半徑
5‧‧‧滾動件
80‧‧‧迴流路徑
100‧‧‧運行路徑1‧‧‧ long axis
11‧‧‧ rolling groove
2‧‧‧ nuts
21‧‧‧Perforation
211‧‧‧ rolling groove
90‧‧‧Load path
212‧‧‧End mounting slots
22‧‧‧ Radial mounting slots
23‧‧‧Return hole
3‧‧‧End plug
31‧‧‧Rotary Road
4‧‧‧ Outer plug
41‧‧‧Rotary Road
R1, R2‧‧‧ radius of gyration
5‧‧‧Rolling parts
80‧‧‧Return path
100‧‧‧Running path

第一圖係為本創作具雙循環結構之滾珠螺桿之系統圖。
第二圖係為本創作具雙循環結構之滾珠螺桿之組合圖。
第三圖係為本創作具雙循環結構之滾珠螺桿之剖視圖。
第四圖係為本創作具雙循環結構之滾珠螺桿之單一運行路徑立體示意圖。The first figure is a system diagram of a ball screw with a double-cycle structure.
The second figure is a combination diagram of a ball screw with a double cycle structure.
The third figure is a cross-sectional view of a ball screw with a double-cycle structure.
The fourth figure is a three-dimensional schematic diagram of a single running path of a ball screw with a double-cycle structure.

　　請參閱第一圖至第四圖所示，係為本創作一較佳實施例之圖式，本創作係為一種具雙循環結構之滾珠螺桿，係包含：一長軸（1），係沿一方向伸長為長條狀結構，該長軸（1）之外緣面設有螺旋狀之滾動溝（11）；一螺帽（2），係設有供該長軸（1）穿設之穿孔（21），該穿孔（21）之內緣面設有相對該滾動溝（11）之滾動槽（211），該滾動溝（11）與滾動槽（211）係構成一負荷路徑（90），該螺帽（2）更設有兩迴流路徑（80），兩該迴流路徑（80）係分別與該負荷路徑（90）銜接後構成兩運行路徑（100），該運行路徑（100）係設有複數滾動件（5）；其中該迴流路徑（80）具有兩迴轉道（31、41），兩該迴轉道（31、41）具有一迴轉半徑（R1、R2），兩該迴轉半徑（R1、R2）係不相等。Please refer to the first to fourth figures, which are diagrams of a preferred embodiment of the present invention. The present invention is a ball screw with a double-cycle structure, comprising: a long axis (1), a line along the line One direction is elongated into a long strip structure, and the outer edge of the long axis (1) is provided with a spiral rolling groove (11); a nut (2) is provided for the long shaft (1) to be worn a perforation (21), the inner edge surface of the perforation (21) is provided with a rolling groove (211) opposite to the rolling groove (11), and the rolling groove (11) and the rolling groove (211) form a load path (90) The nut (2) is further provided with two return paths (80), and the two return paths (80) are respectively connected with the load path (90) to form two running paths (100), and the running path (100) is A plurality of rolling elements (5) are provided; wherein the return path (80) has two turning lanes (31, 41), and the two rotating lanes (31, 41) have a radius of gyration (R1, R2), and the radius of rotation R1, R2) are not equal.

　　本實施例該迴流路徑（80）係由一端塞（3）及一外塞（4）構成，該端塞（3）係設置於該螺帽（2）之穿孔（21）的端部之端部安裝槽（212），該外塞（4）係設置於該螺帽（2）之徑向安裝槽（22），而該徑向安裝槽（22）與該端部安裝槽（212）之間係由一迴流孔（23）連接，使得該端塞（3）及外塞（4）所設之迴轉道（31、41）之一端分別與該迴流孔（23）之兩端銜接而構成該迴流路徑（80）；為了使該螺帽（2）之外徑尺寸具有原本端塞式螺帽之外徑尺寸的優勢，本創作係將該外塞（4）之迴轉半徑（R2）設計小於該端塞（3）之迴轉半徑（R1），如此即可縮小該外塞（4）的整體厚度，使該徑向安裝槽（22）之高度能降低，相對也使螺帽（2）外徑縮小。In this embodiment, the return path (80) is composed of an end plug (3) and an outer plug (4), and the end plug (3) is disposed at the end of the end of the through hole (21) of the nut (2). a mounting groove (212), the outer plug (4) is disposed on the radial mounting groove (22) of the nut (2), and the radial mounting groove (22) and the end mounting groove (212) The intermediate system is connected by a return hole (23) such that one end of the rotary channel (31, 41) provided by the end plug (3) and the outer plug (4) is respectively connected with the two ends of the return hole (23). The return path (80); in order to make the outer diameter dimension of the nut (2) have the advantage of the outer diameter dimension of the original end plug nut, the present invention designs the radius of gyration (R2) of the outer plug (4) Less than the radius of gyration (R1) of the end plug (3), so that the overall thickness of the outer plug (4) can be reduced, so that the height of the radial mounting groove (22) can be reduced, and the nut (2) is relatively The outer diameter is reduced.

　　綜所上述，所以本創作之『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，本創作的『新穎性』以及『進步性』都已符合專利法規，爰依法提出創作專利之申請，祈請惠予審查並早日賜准專利，實感德便。In view of the above, the "industry availability" of this creation should be unquestionable. In addition, the characteristic techniques revealed in the examples in this case have not been seen in publications before, and have not been disclosed. The use, not only has the fact that the effect is improved as described above, but also has additional functions that cannot be neglected. Therefore, the "novelty" and "progressiveness" of the creation have been in compliance with the patent regulations, and the application for creating a patent is proposed according to law. Please give us a review and grant a patent as soon as possible.

　　以上所述實施例之揭示係用以說明本創作，並非用以限制本創作，故舉凡數值之變化與等效元件之置換，仍應隸屬本創作之範疇。The above description of the embodiments is intended to illustrate the present invention and is not intended to limit the present invention. Therefore, variations of numerical values and substitution of equivalent elements are still within the scope of the present invention.

90‧‧‧負荷路徑 90‧‧‧Load path

31‧‧‧迴轉道 31‧‧‧Rotary Road

41‧‧‧迴轉道 41‧‧‧Rotary Road

R1、R2‧‧‧迴轉半徑 R1, R2‧‧‧ radius of gyration

5‧‧‧滾動件 5‧‧‧Rolling parts

80‧‧‧迴流路徑 80‧‧‧Return path

100‧‧‧運行路徑 100‧‧‧Running path

Claims

A ball screw having a double-cycle structure comprises: a long shaft extending in a direction into a long strip structure, wherein the outer surface of the long shaft is provided with a spiral rolling groove; a nut is provided for The long shaft passes through the through hole, and the inner edge surface of the through hole is provided with a rolling groove opposite to the rolling groove, the rolling groove and the rolling groove form a load path, and the nut is further provided with two return paths, and the return path After the connection with the load path, two running paths are formed, and the running path is provided with a plurality of rolling elements; wherein the returning path has two turning lanes, and the two rotating props have a radius of gyration, and the two turning radii are not equal.

The ball screw with a double-cycle structure according to claim 1, wherein the return path is composed of an end plug and an outer plug, and the end plug is disposed at an end mounting groove of the nut, the plug The utility model is disposed on a radial mounting groove of the nut, and the radial mounting groove and the end mounting groove are connected by a return hole, so that one end of the rotary channel provided by the end plug and the outer plug respectively The two ends of the return hole are joined to each other to constitute the return path.

The ball screw having a double cycle structure according to claim 2, wherein a radius of gyration of the outer plug is smaller than a radius of gyration of the end plug.