TWM519199U - External circulation type ball screw - Google Patents

Description

外循環式滾珠螺桿External circulation ball screw

本創作與滾珠螺桿有關，尤指一種可提升作動順暢度之外循環式滾珠螺桿。This creation is related to the ball screw, especially a circulating ball screw that can improve the smoothness of the operation.

申請人於先前所申請公告第M485984號專利案提供了一種循環配件，循環配件具有一覆蓋件與二導引件，覆蓋件具有一迴流道與二定位槽，各導引件具有一定位部與一導引部，導引件藉由定位部安裝於覆蓋件之定位槽，且導引件藉由導引部安裝於螺帽之一安裝槽內，使得滾動件能透過導引件之導引部的導引而進入覆蓋件之迴流道內。The applicant provides a circulation fitting having a cover member and two guide members, and the cover member has a return passage and two positioning grooves, and each guide member has a positioning portion and a patent application No. M485984. a guiding portion, the guiding member is mounted on the positioning groove of the cover member by the positioning portion, and the guiding member is mounted in the mounting groove of one of the nuts by the guiding portion, so that the rolling member can be guided through the guiding member Guided by the part into the return channel of the cover.

然而在實際操作過後發現，導引件之導引部與覆蓋件之迴流道之間的銜接處會出現段差，此一段差會因為滾動件的不斷撞擊而產生震動及噪音，如此勢必會對滾珠螺桿的作動順暢度及使用壽命造成一定程度的影響。因此，前述習用專利案在結構上有改良之必要。However, after the actual operation, it is found that there is a step difference at the joint between the guiding portion of the guiding member and the return passage of the covering member, and this difference may cause vibration and noise due to the continuous impact of the rolling member, so that the ball will be bound to the ball. The smoothness and service life of the screw have a certain degree of influence. Therefore, the aforementioned conventional patents are necessary for structural improvement.

本創作之主要目的在於提供一種外循環式滾珠螺桿，其能提升作動順暢度及延長使用壽命。The main purpose of this creation is to provide an external circulation ball screw which can improve the smoothness of operation and prolong the service life.

為了達成上述目的，本創作之外循環式滾珠螺桿包含有一螺桿軸、一螺帽，以及一迴流單元。該螺桿軸具有一外螺紋槽；該螺帽可沿著該螺桿軸之軸向位移地套設於該螺桿軸且具有一內螺紋槽，該內螺紋槽對應於該螺桿軸之外螺紋槽，使得該螺帽之內螺紋槽與該螺桿軸之外螺紋槽之間形成一負載通道，此外，該螺帽具有一第一抵靠平面，該第一抵靠平面之兩端分別具有一連通該內螺紋槽之安裝孔；該迴流單元具有二導引件與一蓋板，各該導引件具有一導引部，該導引部嵌設於該螺帽之安裝孔內且具有一銜接該負載通道之第一迴流槽與一鄰接於該第一迴流槽之第一承接面，該蓋板具有一第二抵靠平面，該第二抵靠平面抵接於該螺帽之第一抵靠平面且具有一第二迴流槽與二凸部，各該凸部嵌設於該螺帽之安裝孔內且具有一延伸導引槽與一第二承接面，該延伸導引槽之兩端分別銜接該第一、第二迴流槽，該第二承接面抵接於該導引件之第一承接面。In order to achieve the above object, the recirculating ball screw of the present invention comprises a screw shaft, a nut, and a reflow unit. The screw shaft has an externally threaded groove; the nut is sleeved on the screw shaft along the axial direction of the screw shaft and has an internally threaded groove corresponding to the threaded groove outside the screw shaft, Forming a load passage between the inner thread groove of the nut and the thread groove of the screw shaft, and further, the nut has a first abutting plane, and the two ends of the first abutting plane respectively have a communication a mounting hole of the internal thread groove; the reflow unit has two guiding members and a cover plate, each guiding member has a guiding portion, the guiding portion is embedded in the mounting hole of the nut and has a connection a first returning groove of the load channel and a first receiving surface adjacent to the first returning groove, the cover plate has a second abutting plane, the second abutting plane abutting the first abutting of the nut The plane has a second recirculation groove and two protrusions, and each of the protrusions is embedded in the mounting hole of the nut and has an extending guiding slot and a second receiving surface, and the two ends of the extending guiding slot are respectively Connecting the first and second return grooves, the second receiving surface abuts the first receiving of the guiding member .

由上述可知，本創作之外循環式滾珠螺桿利用該蓋板之凸部的延伸設計，可以有效改善習用技術當中所產生的段差問題，讓滾珠在轉折過程中不會有衝擊點的問題，進而達到提升作動順暢度及延長使用壽命的目的。It can be seen from the above that the recirculating ball screw of the present invention can effectively improve the step difference generated in the conventional technology by using the extension design of the convex portion of the cover plate, so that the ball does not have a problem of impact points during the turning process, and further To achieve the purpose of improving the smoothness of operation and extending the service life.

請參閱第1及2圖，本創作之外循環式滾珠螺桿10包含有一螺桿軸20、一螺帽30、一迴流單元40，以及多數滾珠70。Referring to Figures 1 and 2, the recirculating ball screw 10 of the present invention includes a screw shaft 20, a nut 30, a reflow unit 40, and a plurality of balls 70.

螺桿軸20之外周面具有一外螺紋槽22。The outer peripheral face of the screw shaft 20 has an externally threaded groove 22.

螺帽30套設於螺桿軸20且具有一內螺紋槽31，內螺紋槽31對應於螺桿軸20之外螺紋槽22而與螺桿軸20之外螺紋槽22之間形成一負載通道12(如第5圖所示)。此外，螺帽30具有一第一抵靠平面32，第一抵靠平面32之兩端分別具有一連通內螺紋槽31之安裝孔33與一鄰設於安裝孔33之螺孔34。The nut 30 is sleeved on the screw shaft 20 and has an internal thread groove 31. The internal thread groove 31 forms a load passage 12 corresponding to the external thread groove 22 of the screw shaft 20 and the thread groove 22 outside the screw shaft 20. Figure 5). In addition, the nut 30 has a first abutting surface 32. The two ends of the first abutting surface 32 respectively have a mounting hole 33 communicating with the internally threaded groove 31 and a screw hole 34 adjacent to the mounting hole 33.

迴流單元40具有二導引件50，各導引件50具有一導引部51與一定位部52，導引部51嵌設於螺帽30之安裝孔33內且具有一銜接負載通道12之第一迴流槽53與一鄰接於第一迴流槽53之第一承接面54，定位部52之一端連接導引部51，定位部52之另一端具有一定位孔55，各導引件50藉由一螺絲56固定於螺帽30，螺絲56穿設於導引件50之定位孔55且固定於螺帽30之螺孔34內。此外，如第3至5圖所示，迴流單元40更具有一蓋板60，蓋板60具有一第二抵靠平面61，第二抵靠平面61抵接於螺帽30之第一抵靠平面32且具有一第二迴流槽62、二凸部63以及二定位槽64，各凸部63嵌設於螺帽30之安裝孔33內且具有一延伸導引槽65與一第二承接面66，延伸導引槽65之兩端分別銜接第一、第二迴流槽53、62，第二承接面66抵接於導引件50之第一承接面54，定位槽64鄰設於凸部63且套接導引件50之定位部52，使蓋板60與導引件50能組裝在一起。The reflow unit 40 has two guiding members 50. Each guiding member 50 has a guiding portion 51 and a positioning portion 52. The guiding portion 51 is embedded in the mounting hole 33 of the nut 30 and has a connecting load channel 12. The first returning groove 53 and the first receiving surface 54 adjacent to the first returning groove 53 are connected to the guiding portion 51 at one end of the positioning portion 52. The other end of the positioning portion 52 has a positioning hole 55. The screw 56 is fixed to the nut 30 by a screw 56. The screw 56 is inserted into the positioning hole 55 of the guiding member 50 and fixed in the screw hole 34 of the nut 30. In addition, as shown in FIGS. 3 to 5, the reflow unit 40 further has a cover plate 60 having a second abutment plane 61, and the second abutment plane 61 abuts against the first abutment of the nut 30. The flat surface 32 has a second retreating groove 62, two convex portions 63 and two positioning grooves 64. Each convex portion 63 is embedded in the mounting hole 33 of the nut 30 and has an extending guiding groove 65 and a second receiving surface. 66, the two ends of the extending guide groove 65 are respectively connected to the first and second return grooves 53, 62, the second receiving surface 66 abuts against the first receiving surface 54 of the guiding member 50, and the positioning groove 64 is adjacent to the convex portion 63, and the positioning portion 52 of the guiding member 50 is sleeved, so that the cover plate 60 and the guiding member 50 can be assembled.

各滾珠70設於負載通道12內且經由第一、第二迴流槽53、62而產生循環運行。Each of the balls 70 is disposed in the load passage 12 and is circulated through the first and second return grooves 53 and 62.

由上述可知，本創作之外循環式滾珠螺桿10利用蓋板60之凸部63延伸進入安裝孔33，讓第二承接面66抵接於導引件50之第一承接面54，也讓導引槽65銜接第一迴流槽53，如此一來，滾珠70從負載通道12進入第一迴流槽後53可以快速地接觸凸部63而受到導引槽65的導引。讓本創作改善習用技術中在銜接處所產生的段差，也讓滾珠70在變換方向時能順暢地運行在負載通道12、螺帽30和迴流單元40內，減少滾珠70因為段差所造成的震動和噪音，進而提升作動順暢度也延長使用壽命。It can be seen from the above that the recirculating ball screw 10 of the present invention extends into the mounting hole 33 by the convex portion 63 of the cover plate 60, and the second receiving surface 66 abuts against the first receiving surface 54 of the guiding member 50, and also guides The guiding groove 65 is engaged with the first recirculation groove 53, so that the ball 70 can quickly contact the convex portion 63 and be guided by the guiding groove 65 after entering the first recirculation groove from the load channel 12. This creation improves the difference in the joints in the conventional technique, and also allows the balls 70 to smoothly run in the load channel 12, the nut 30 and the reflow unit 40 when changing directions, reducing the vibration of the balls 70 due to the step difference. Noise, which improves the smoothness of the operation and prolongs the service life.

10‧‧‧外循環式滾珠螺桿
12‧‧‧負載通道
20‧‧‧螺桿軸
22‧‧‧外螺紋槽
30‧‧‧螺帽
31‧‧‧內螺紋槽
32‧‧‧第一抵靠平面
33‧‧‧安裝孔
34‧‧‧螺孔
40‧‧‧迴流單元
50‧‧‧導引件
51‧‧‧導引部
52‧‧‧定位部
53‧‧‧第一迴流槽
54‧‧‧第一承接面
55‧‧‧定位孔
56‧‧‧螺絲
60‧‧‧蓋板
61‧‧‧第二抵靠平面
62‧‧‧第二迴流槽
63‧‧‧凸部
64‧‧‧定位槽
65‧‧‧延伸導引槽
66‧‧‧第二承接面
70‧‧‧滾珠10‧‧‧External circulation ball screw
12‧‧‧Load channel
20‧‧‧ Screw shaft
22‧‧‧External thread groove
30‧‧‧ Nuts
31‧‧‧Threaded groove
32‧‧‧First landing plane
33‧‧‧Installation holes
34‧‧‧ screw holes
40‧‧‧Reflux unit
50‧‧‧Guide
51‧‧‧Guidance
52‧‧‧ Positioning Department
53‧‧‧First reflow tank
54‧‧‧The first interface
55‧‧‧Positioning holes
56‧‧‧ screws
60‧‧‧ cover
61‧‧‧Second abutment plane
62‧‧‧Second reflow tank
63‧‧‧ convex
64‧‧‧ positioning slot
65‧‧‧Extension guide groove
66‧‧‧Second interface
70‧‧‧ balls

第1圖為本創作之立體圖。                  第2圖為本創作之立體分解圖。                  第3圖為本創作之局部立體圖，主要顯示導引件與蓋板之間的結構關係。                  第4圖為本創作之徑向剖視圖。                  第5圖為本創作之軸向剖視圖。The first picture is a perspective view of the creation. Figure 2 is an exploded perspective view of the creation. Figure 3 is a partial perspective view of the creation, mainly showing the structural relationship between the guide member and the cover plate. Figure 4 is a radial cross-sectional view of the creation. Figure 5 is an axial cross-sectional view of the creation.

20‧‧‧螺桿軸 20‧‧‧ Screw shaft

22‧‧‧外螺紋槽 22‧‧‧External thread groove

30‧‧‧螺帽 30‧‧‧ Nuts

31‧‧‧內螺紋槽 31‧‧‧Threaded groove

32‧‧‧第一抵靠平面 32‧‧‧First landing plane

33‧‧‧安裝孔 33‧‧‧Installation holes

34‧‧‧螺孔 34‧‧‧ screw holes

40‧‧‧迴流單元 40‧‧‧Reflux unit

50‧‧‧導引件 50‧‧‧Guide

51‧‧‧導引部 51‧‧‧Guidance

52‧‧‧定位部 52‧‧‧ Positioning Department

53‧‧‧第一迴流槽 53‧‧‧First reflow tank

54‧‧‧第一承接面 54‧‧‧The first interface

55‧‧‧定位孔 55‧‧‧Positioning holes

56‧‧‧螺絲 56‧‧‧ screws

60‧‧‧蓋板 60‧‧‧ cover

61‧‧‧第二抵靠平面 61‧‧‧Second abutment plane

62‧‧‧第二迴流槽 62‧‧‧Second reflow tank

63‧‧‧凸部 63‧‧‧ convex

64‧‧‧定位槽 64‧‧‧ positioning slot

65‧‧‧延伸導引槽 65‧‧‧Extension guide groove

66‧‧‧第二承接面 66‧‧‧Second interface

Claims (2)

一種外循環式滾珠螺桿，包含有： 一螺桿軸，具有一外螺紋槽； 一螺帽，可沿著該螺桿軸之軸向位移地套設於該螺桿軸且具有一內螺紋槽，該內螺紋槽對應於該螺桿軸之外螺紋槽，使得該螺帽之內螺紋槽與該螺桿軸之外螺紋槽之間形成一負載通道，該螺帽具有一第一抵靠平面，該第一抵靠平面之兩端分別具有一連通該內螺紋槽之安裝孔；以及 一迴流單元，具有二導引件與一蓋板，各該導引件具有一導引部，該導引部嵌設於該螺帽之安裝孔內且具有一銜接該負載通道之第一迴流槽與一鄰接於該第一迴流槽之第一承接面，該蓋板具有一第二抵靠平面，該第二抵靠平面抵接於該螺帽之第一抵靠平面且具有一第二迴流槽與二凸部，各該凸部嵌設於該螺帽之安裝孔內且具有一延伸導引槽與一第二承接面，該延伸導引槽之兩端分別銜接該第一、第二迴流槽，該第二承接面抵接於該導引件之第一承接面。An outer circulation type ball screw comprises: a screw shaft having an externally threaded groove; a nut that is axially displaced along the axial direction of the screw shaft and has an internally threaded groove therein The thread groove corresponds to the thread groove outside the screw shaft, so that a threaded groove is formed between the thread groove of the nut and the thread groove of the screw shaft, and the nut has a first abutting plane, and the first abutting Each of the two ends of the plane has a mounting hole communicating with the internally threaded groove; and a reflow unit having two guiding members and a cover plate, each of the guiding members having a guiding portion, the guiding portion being embedded in the guiding portion The first recirculation groove of the nut and the first recirculation groove adjacent to the first recirculation groove have a second abutting surface, and the second abutment The plane abuts against the first abutting surface of the nut and has a second recirculation groove and two protrusions, each of the protrusions being embedded in the mounting hole of the nut and having an extension guiding slot and a second a receiving surface, the two ends of the extending guiding groove are respectively connected to the first and second return grooves, Second receiving surface abuts against the first receiving surface of the guide member. 如請求項1所述之外循環式滾珠螺桿，其中該螺帽之第一抵靠平面的兩端分別具有一鄰設於該安裝孔之螺孔，各該導引件更具有一連接該導引部之定位部與一貫穿該定位部之定位孔，各該導引件藉由一螺絲固定於該螺帽，該螺絲穿設於該導引件之定位孔且固定於該螺帽之螺孔內，該蓋板之第二抵靠平面的兩端分別具有一定位槽，該定位槽套設於一該導引件之定位部。The recirculating ball screw of claim 1, wherein the two ends of the first abutting plane of the nut respectively have a screw hole adjacent to the mounting hole, and each of the guiding members further has a connecting guide. a positioning portion of the lead portion and a positioning hole penetrating the positioning portion, each of the guiding members is fixed to the nut by a screw, the screw is inserted through the positioning hole of the guiding member and fixed to the screw of the nut In the hole, the two ends of the second abutting plane of the cover plate respectively have a positioning groove, and the positioning groove is sleeved on a positioning portion of the guiding member.