TWM593484U - Ball screw assembly - Google Patents

Abstract

A ball screw assembly includes an guider, an opening nut, a plurality of opening sleeves, a first circulator, a second circulator and a plurality of ball assemblies. The opening nut includes an axial cylinder having an axial opening. An inner spiral channel of the axial cylinder and a spiral channel of the guider are correspondingly formed an inner ball channel. The plurality of opening sleeves are axially sleeved on the axial cylinder. An inner wall of the plurality of opening sleeves and an outer wall of the axial cylinder are correspondingly formed an outer ball channel. The first circulator and the second circulator are disposed on opening nut and corresponding to the plurality of opening sleeves. Wherein the inner ball channel, a first curve of the first circulator, the outer ball channel and a second curve of the second circulator are formed the ball circulation channel.

Description

Ball circulation guide device

The present invention relates to a ball circulation guide device, especially a ball circulation guide device with an open nut with an axial opening.

Today's ball screw device, through the cooperation of the screw and the nut, converts the rotary motion into a linear motion. By making the balls set in the ball nut rolling in the circulation path cooperate with the screw with the spiral groove, the friction force generated when the ball nut and the screw are moved relative to each other is reduced.

Existing ball nuts are mostly in the form of complete cylinders. When the screw is long and a support seat is provided to avoid the sagging of the screw, it is necessary to provide a retracting mechanism on the support seat. When the ball nut rotates on the screw to pass through the place where there is a support seat, the support seat is first temporarily moved away from the screw through the retraction mechanism. After the ball nut passes through, the retraction mechanism returns the support base to the support position to provide the support force required by the screw.

However, with the above method, on the one hand, it is necessary to additionally provide a disengagement mechanism on each support base. On the other hand, when each support base is far from the screw, if the section of the screw sags due to its own weight, the ball nut may cause additional sway when the screw passes through the section of the screw, or the ball may not be able to Problems such as rolling in the thread groove affect the manufacturing accuracy when actually applied in the manufacturing process.

In view of this, in one embodiment, the present invention provides a ball circulation guide device including a guide, an open nut, a plurality of opening shields, a first circulator, a second circulator, and a plurality of ball circulation groups. The guide has a central axis and a plurality of spiral channels. The spiral channel surrounds the outer circumference of the guide. The open nut is slipped on the guide piece. The split nut includes an axial cylinder, and the axial cylinder has an axial opening. The axial cylinder is provided with a first axial wall and a second axial wall on opposite sides of the axial opening. The axial cylinder includes an inner ring wall and an outer ring wall. The inner ring wall has an inner spiral channel. The inner spiral channel and the spiral channel of the guide correspond to each other and together form an inner ball channel.

A plurality of opening shields are coaxially sleeved on the outer periphery of the axial cylinder, and each opening shield has an inner peripheral wall. The inner peripheral wall and the outer ring wall of the axial cylinder correspond to each other and together form an outer ball channel. In the plane projection of the outer ball channel formed by the radial direction, each outer ball channel is perpendicular to the central axis.

The first circulator is disposed on the first axial wall. The first circulator includes a plurality of first bends. The two ends of each first curve respectively correspond to one of the plural inner ball channels and one of the plural outer ball channels. The second circulator is disposed on the second axial wall. The second circulator includes a plurality of second curves, and two ends of each second curve respectively correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels. Each ball circulation group includes plural steel balls. Among them, one of the plural inner ball passages, one of the plural first bends, one of the plural outer ball passages and one of the plural second bends together form the first ball circulation passage, the other of the plural inner ball passages, the plural first The other of the bends, the other of the plurality of outer ball passages and the other of the plurality of second bends together form a second ball circulation passage. One of the plural ball circulation groups rolls in the first ball circulation channel, and the other of the plural ball circulation groups rolls in the second ball circulation channel.

In another embodiment of the present invention, a ball circulation guide device includes a guide, an open nut, a plurality of opening shields, a first circulator, a second circulator, and a plurality of ball circulation groups. The guide has a central axis and a plurality of spiral channels. The spiral channel surrounds the outer circumference of the guide. The open nut is slipped on the guide piece. The split nut includes an axial cylinder, and the axial cylinder has an axial opening. The axial cylinder is provided with a first axial wall and a second axial wall on opposite sides of the axial opening. The axial cylinder includes an inner ring wall and an outer ring wall. The inner ring wall has an inner spiral channel, and the inner spiral channel and the spiral channel of the guide member correspond to each other and jointly form a plurality of inner ball channels.

A plurality of opening shields are coaxially sleeved on the outer periphery of the axial cylinder, and each opening shield has an inner peripheral wall. The inner peripheral wall and the outer ring wall of the axial cylinder correspond to each other and together form an outer ball channel. The outer ball channels are projected obliquely with respect to the central axis in the plane projection. The plane is perpendicular to the symmetry plane of the opening shield viewed from one end of the central axis and parallel to the central axis.

The first circulator is disposed on the first axial wall. The first circulator includes a plurality of first bends. The two ends of each first curve respectively correspond to one of the plural inner ball channels and one of the plural outer ball channels. The second circulator is disposed on the second axial wall. The second circulator includes a plurality of second curves, and two ends of each second curve respectively correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels. Each ball circulation group includes plural steel balls. Among them, one of the plural inner ball passages, one of the plural first bends, one of the plural outer ball passages and one of the plural second bends together form the first ball circulation passage, the other of the plural inner ball passages, the plural first The other of the bends, the other of the plurality of outer ball passages and the other of the plurality of second bends together form a second ball circulation passage. One of the plural ball circulation groups rolls in the first ball circulation channel, and the other of the plural ball circulation groups rolls in the second ball circulation channel.

Because the axial nut of the split nut has an axial opening, when the split nut is set on a guide (such as a screw or a conversion rod) and moves, even if a support seat is provided under the guide, the split nut Where it passes through the support seat, it can pass through the support seat through an axial opening without interfering with the support seat. Thereby, there is no need to provide a dislocation mechanism on the support base. In addition, when the open nut passes through the support base, the support base can maintain the state of supporting the guide without causing the guide to sag and deform due to the departure of the support, which affects the manufacturing accuracy of the actual application in the manufacturing process. The opening shield can form an outer ball channel together with the axial cylinder, so that the steel ball rolls in the outer channel, and can also provide a dustproof effect.

The modular opening shield, the first circulator and the second circulator can be used to arrange the required number of opening shields, the first circulator and the second circulator at the required places. For example, for shorter or lighter weight carriers, one or two sets of opening shields, first circulators, and second circulators can be used together. For longer or heavy-weight carriers, multiple sets of opening shields, first circulators, and second circulators can be used at appropriate locations. Modular design can make the application more flexible and more in line with the needs.

In some embodiments, there are plural first circulators and plural second circulators.

In some embodiments, the inner peripheral wall and the outer ring wall of one of the plurality of open shields further form another outer ball channel. The two ends of one of the plurality of first bends respectively correspond to one of the plurality of inner ball channels and the other outer ball channel. The two ends of one of the plurality of second bends respectively correspond to one of the plurality of inner ball channels and the other outer ball channel. One of the plurality of inner ball channels, one of the plurality of first bends, the other outer ball channel and one of the plurality of second bends together form a third ball circulation channel. One of the ball circulation groups rolls in the third ball circulation channel.

In some embodiments, the first curve is disposed diagonally with respect to the short side of the first circulator, and the second curve is disposed diagonally with respect to the short side of the second circulator.

In some embodiments, each first curve and the short side of the first circulator are parallel to each other, and each second curve and the short side of the second circulator are parallel to each other.

In some embodiments, the ball circulation guiding device further includes a ball retainer, and a plurality of steel balls are connected in series by the ball retainer.

In some embodiments, the outer ring wall of the axial cylinder has a plurality of outer channels to form an outer ball channel together with the plurality of inner peripheral walls. Further, in some embodiments, the inner peripheral wall of each opening shield has an inner channel, and is disposed corresponding to the plurality of outer channels, so that the plurality of outer channels and the plurality of inner channels correspond to form an outer ball channel.

In some embodiments, the inner peripheral wall of each open shroud has an inner channel to form a plurality of outer ball channels together with the outer ring wall of the axial cylinder.

The detailed features and advantages of the new model are described in the following embodiments. The content is sufficient for anyone familiar with the relevant art to understand and implement the technical content of the new model, and according to the contents disclosed in this specification, the scope of patent application and the drawings Anyone who is familiar with related skills can easily understand the purpose and advantages of this new type.

Please refer to FIGS. 1 to 5 first. FIG. 1 is a perspective view of the ball circulation guide device according to the first embodiment of the present invention, and FIG. 2 is an exploded view of the ball circulation guide device according to the first embodiment of the present invention. FIG. 3 is an exploded view of the ball circulation guide device of the first embodiment of the present invention from another perspective, FIG. 4 is a bottom view of the opening sleeve of the first embodiment of the new model, and FIG. 5 is a model of the new model Top view of the second circulator of the first embodiment.

As can be seen from FIGS. 1 and 2, in this embodiment, the ball circulation guide device includes a guide 10, an opening nut 20, a plurality of opening shields 30, a first circulator 40, a second circulator 50, and a plurality of balls Circulation group 60. The guide 10 may be, for example, a screw or a conversion rod. In this embodiment, the screw is used as an example. As can be seen from FIG. 1, the guide 10 has a central axis C and a spiral channel 11.

As can be seen from FIGS. 1 and 2, the open nut 20 includes an axial cylinder 21, and the axial cylinder 21 has an axial opening 211. The axial cylinder 21 is provided with a first axial wall 212 and a second axial wall 213 on opposite sides of the axial opening 211. The axial cylinder 21 includes an inner ring wall 214 and an outer ring wall 215, and the inner ring wall 214 has an inner spiral channel 2141. The inner spiral channel 2141 and the spiral channel 11 of the guide 10 correspond to each other and together form an inner ball channel. In detail, the guide 10 has a spiral channel 11 surrounding the outer circumference of the guide 10. The spiral groove 11 is arranged around the outer circumference of the guide 10 at a desired spiral angle. The open nut 20 will axially penetrate and slide on the guide 10, and make the inner spiral channel 2141 and the spiral channel 11 of the guide 10 correspond to each other and form an inner ball channel together.

The opening shield 30 is axially sleeved on the outer periphery of the axial cylinder 21. Each opening shroud 30 has an inner peripheral wall 31 which corresponds to the outer ring wall 215 of the axial cylinder 21 and forms an outer ball channel together. In this embodiment, in order to enable the ball circulation group 60 to circulate and roll in the outer ball channel, an inner channel 311 is formed on the inner peripheral wall 31 of each opening shield 30, and the outer ring wall 215 of the axial cylinder 21 It is flat so that the inner channel 311 and the outer ring wall 215 of the axial cylinder 21 together form an outer ball channel.

In other embodiments, an outer channel can also be formed on the outer ring wall 215 of the axial cylinder 21. In this case, the outer channel and the inner peripheral wall 31 cooperate to form an outer ball channel. Or in other embodiments, an outer channel on the outer ring wall 215 of the axial cylinder 21 and an inner channel 311 corresponding to each other on the inner peripheral wall 31 of each opening shield 30 may be provided. The opening shield 30 is correspondingly arranged on the axial cylinder 21 so that the inner channel 311 on the inner peripheral wall 31 and the outer channel of the outer ring wall 215 jointly form an outer ball channel.

In addition, the opening shield 30 can form an outer ball channel together with the axial cylinder 21, so that the ball circulation group 60 rolls in the outer ball channel, and can also provide a dustproof effect.

In this embodiment, as can be seen from FIGS. 2 and 3, there are a plurality of inner spiral channels 2141, but this is only an example. Actually, only one inner spiral channel 2141 may be provided according to requirements, but two or more inner spiral channels 2141 may also be provided. In FIGS. 2 and 3, to make the drawings clear and concise, only one of them is marked as an example.

Next, please refer to FIGS. 2 to 5 at the same time. In order to clearly show the planes and axes, the XYZ three-axis coordinates that are perpendicular to each other are provided in FIG. 2 to clarify the relationship between the various perspectives in space, and the follow-up will also follow this The coordinate axis is used to explain each drawing. As can be seen from FIGS. 2 and 4, the central axis C of the guide 10 extends along the X-axis direction. Here, for direction description, a symmetry plane is defined as viewed from one end of the central axis C (for example, viewed from one end of the X axis toward the positive direction of the X axis) when the opening shield 30 or the opening nut 20 is used, the opening shield 30 Or the open nut 20 has a symmetrical plane, that is, the plane formed by the XZ axis shown in FIG. 2. Another definition is to look down from the top of the drawing along the Z-axis direction (toward the negative direction of the Z-axis), which is the top view direction P. The plane perpendicular to the symmetry plane and parallel to the central axis C, that is, the plane formed by the XY axis shown in FIG. 2 is also the plane formed by the plan view P.

The outer ball channel and the central axis C are arranged obliquely to each other. FIG. 4 is a schematic view of the opening shield 30 viewed from the upward direction (toward the positive value of the Z axis). As can be seen from FIG. 4, in this embodiment, the inner channel 311 as the outer ball channel is an inner channel 311 that is circumferentially arranged on the inner peripheral wall 31, and the inner channel 311 is clearly visible from the bottom The direction of the channel is an oblique direction (inclined from the upper right to the lower left, the style of the internal channel 311 is commonly known as the inclined groove). It can be seen from FIG. 4 that the inner channel 311 and the central axis C are projected in the upward direction. In the planar projection formed by the upward direction, the inner channel 311 will be disposed obliquely with respect to the central axis C, that is, between the two The included angle A is not a right angle. Similarly, if the inner channel 311 and the central axis C are projected in a plan view direction P and projected on a plane (that is, on the plane formed by the XY axis), in the plane projection formed in the plan direction P, the inner channel 311 will be set obliquely with respect to the central axis C, which means that the angle between the two is not a right angle.

Further, since the inner spiral channel 2141 and the inner channel 311 are both spirally arranged, when the two are spiral channels with the same spiral angle, that is, as shown in this embodiment, when the inner spiral channel 2141 and the inner channel 311 When they are set parallel to each other, due to the same inclination angle, when the ball circulation group 60 rolls in the ball circulation channel, its load can be more continuous and smoothly roll, without excessive roll angle conversion, which makes the rolling more Discontinuity problem.

Next, please refer to FIGS. 1 to 3 and 6 again, the first circulator 40 is disposed on the first axial wall 212. The first circulator 40 includes a plurality of first curves 41, and the two ends of each first curve 41 will respectively correspond to one of the plurality of inner spiral channels 2141 (inner ball channel) and the plurality of inner channels 311 (outer ball channel) one. The second circulator 50 is disposed on the second axial wall 213. The second circulator 50 includes a plurality of second bends 51, and two ends of each second bend 51 respectively correspond to one of the plurality of inner spiral grooves 2141 (inner ball channel) and the plurality of inner grooves 311 (outer ball channel) One. In this embodiment, as can be seen from FIGS. 2 and 3, there are a plurality of first curves 41 and second curves 51. In FIGS. 2 and 3, to make the drawing clear and concise, only one of the first curve 41 and the second curve 51 is marked as an example.

Wherein, the first circulator 40 and the second circulator 50 can be disposed on the first axial wall 212 and the second axial wall 213 by screwing, sticking or clamping. If it is fixed by screw lock, when the first circulator 40 and the second circulator 50 are worn out due to long-term use, you can replace only the first circulator 40 and the second circulator 50 without replacing the entire ball Nut 100.

Further, the first circulator 40 and the second circulator 50 shown in this embodiment have the same structure, so that only one type of component needs to be manufactured during manufacturing, that is, they can be used as the first circulator at the same time 40 and the second circulator 50 are used. Of course, the first circulator 40 and the second circulator 50 with different structures may also be used depending on actual use requirements. For example, the first circulator 40 and the second circulator 50 with different numbers of bends are used, or the first circulator 40 and the second circulator 50 with bends having different arrangements or arrangement pitches are used.

Next, it can be seen from FIG. 2 that each ball circulation group 60 includes a plurality of steel balls 61. If the inner spiral grooves 2141 (inner ball channels) arranged in sequence are ordered from one end to the first, second, ... Nth lanes. The inner channels 311 (outer ball channels) arranged in sequence are also sequenced from the same end into the first channel, the second channel...the Nth channel. The plurality of first curves 41 and the plurality of second curves 51 are also sequenced from the same end into the first track, the second track...the Nth track. After the assembly of the first circulator 40 and the second circulator 50 is completed as shown in FIG. 1, the first bend of the first circulator 40 disposed on the first axial wall 212 of the axial cylinder 21 The channel 41 will correspond to the first inner ball channel and the first outer ball channel, and the first second curve 51 of the second circulator 50 disposed on the second axial wall 213 of the axial cylinder 21 It will also correspond to the first inner ball channel and the first outer ball channel. At this time, the first inner ball channel, the first first curved path 41, the first outer spiral ball channel and the first second curved path 51 will jointly form a first ball circulation channel. All the steel balls 61 in a group of ball circulation groups 60 will circulate and roll in the first ball circulation channel.

Going down in sequence, the second first curve 41 will correspond to the second inner ball channel and the second outer ball channel, and the second second curve 51 will also correspond to the second inner ball channel and the second Outside the ball channel. At this time, the second inner ball channel, the second first curve 41, the second outer spiral ball channel and the second second curve 51 will jointly form a second ball circulation channel. All the steel balls 61 in the other ball circulation group 60 will circulate and roll in the second ball circulation channel.

With the above structure, by providing the first circulator 40 and the second circulator 50 on the axial cylinder 21, the first circulator 40 and the second circulator 50 can communicate with the annular wall located inside the axial cylinder 21 The inner spiral channel 2141 on 214 and the inner channel 311 on the inner peripheral wall 31. At the same time, the ball circulation group 60 can be smoother during the process of rolling from the inner spiral channel 2141 to the inner channel 311 during rolling.

At the same time, as shown in FIGS. 2 and 3, in this embodiment, multiple sets of ball circulation channels are presented. However, in actual use, the number of ball circulation groups can be freely matched according to the needs of light and heavy loads. For example, as needed, only two sets of ball circulation groups can be used in two of the ball circulation channels, or more sets of ball circulation groups can be used, or the entire opening nut 20 and the opening guard 30 can be filled. Row setting, so as to achieve light and heavy load.

Next, please refer to FIG. 2 and FIG. 3 again. Here, a group of ball circulation groups 60 is exploded as a schematic, which is also used to indicate the installation status of the steel balls 61 of the ball circulation group 60 in the ball circulation channels. The ball circulation group 60 will wrap around the inner ball channel, the first curve 41, the outer spiral ball channel and the second curve 51 in a ring shape, and circulate and roll in an independent ball circulation channel. In practical applications, as shown in FIG. 2 and FIG. 3, a plurality of sets of ball circulation groups 60 may be set, and each group of ball circulation groups 60 will only continue to roll in the ball circulation channels provided by it.

With the above structure, since the axial barrel 21 of the split nut 20 has the axial opening 211, when the split nut 20 moves on the guide 10, even if an additional support assembly is provided under the guide 10 (For example, a support base, not shown), the opening nut 20 can pass through the support assembly through the axial opening 211 where it passes through the support assembly without interfering with the support assembly. Thereby, it is not necessary to provide a dislocation mechanism on the support assembly, so that the support assembly is dislocated away from the guide 10 when the generally cylindrical ball nut is going to pass. In addition, when the split nut 20 passes through the support assembly, the support assembly can maintain the state of supporting the guide 10 without causing a problem that the guide 10 sags and deforms, which affects the manufacturing accuracy when actually applied in the manufacturing process.

As can be seen in FIGS. 2 and 3, in this embodiment, there are a plurality of ball circulation channels and a plurality of ball circulation groups 60, which are respectively set corresponding to each group. Each group of ball circulation groups 60 is independently circulated and rolled in the set ball circulation channels.

In other embodiments, the two ends of the first curve 41 may respectively correspond to an inner ball channel and another outer ball channel, and the two ends of the second curve 51 may respectively correspond to an inner ball channel and another outer ball channel. Ball channel. For example, one end of the first curve 41 may be connected to the inner spiral channel 2141 in the first channel, and the other end may be connected to the inner channel 311 in the third channel instead of being connected to the inner channel which is also the first channel道311. The two ends of the second curve 51 correspond to the communication manner of the first curve 41. One end is connected to the inner spiral channel 2141 in the first channel, and the other end is connected to the inner channel 311 in the third channel. This can be achieved by adjusting the inclination of the first curve 41 and the second curve 51.

For example, if the first curve 41 is arranged diagonally with respect to the short side of the first circulator 40, and the second curve 51 is arranged diagonally with respect to the short side of the second circulator 50, by adjusting the The inclination of one curve 41 and the second curve 51 can make the inner spiral channel 2141 communicate with the inner channels 311 of different channels to achieve the effect of jumping.

In this way, the first inner ball channel, the first first curve 41, the third outer ball channel, and the first second curve 51 jointly form a third ball circulation channel. The ball circulation group 60 provided in the third ball circulation channel will circulate and roll in the first inner ball channel, the first first curve 41, the third outer ball channel and the first second curve 51 . In this way, through the setting of different circulators, different inner ball channels and outer ball channels can be matched to form different combinations of independent ball circulation channels. In this way, users can flexibly match heavy or light loads.

In this embodiment, since the inner spiral channel 2141 and the inner channel 311 are spiral channels with the same spiral angle, the short sides of the first curved channel 41 and the first circulator 40 are parallel to each other, and the second curved channel The short sides of 51 and the second circulator 50 are arranged parallel to each other. Since the first circulator 40 and the second circulator 50 have the same structure, only the second circulator 50 is taken as an example for illustration in FIG. 5. It can be more clearly understood from the top view of FIG. 5 that when there are a plurality of second bends 51 of the second circulator 50, the second bends 51 are arranged parallel to each other, and are arranged vertically from top to bottom, that is, parallel to the first The short side of the second circulator 50 is set. Similarly, there are a plurality of first curves 41, and each first curve 41 will be arranged parallel to each other. If the first circulator 40 is moved to the same angle of view as the second circulator 50, that is, when the opening is up, the first curve 41 is also arranged vertically from top to bottom, that is, parallel to the short side of the first circulator 40 Settings. In this way, when the first bend 41 is to be formed on the first circulator 40 or the second bend 51 is to be formed on the second circulator 50, it is more convenient to locate the direction to be milled. Or, when the first circulator 40 or the second circulator 50 is manufactured by injection molding, it is easier to manufacture and remove the mold.

In addition, in this embodiment, the steel ball 61 provided in the ball circulation guide device does not need to be additionally provided with a ball retainer, that is, the guide 10, the opening nut 20, the opening shield 30, the first circulator Under the limit of the ball circulation channel formed by 40 and the second circulator 50, it rolls in each independent ball circulation channel without falling out of the ball circulation channel. However, in other embodiments, a plurality of steel balls 61 in the ball circulation group 60 may be connected in series by providing a ball retainer.

6 to 9, FIG. 6 is an exploded view of the ball circulation guide device of the second embodiment of the present invention, and FIG. 7 is another perspective of the ball circulation guide device of the second embodiment of the present invention 8 is a bottom view of the opening sleeve of the second embodiment of the present invention, and FIG. 9 is a top view of the second circulator of the second embodiment of the present invention. In this embodiment, the same points as the first embodiment will be denoted by the same element symbols, and will not be repeated.

First of all, the difference between this embodiment and the first embodiment is that in this embodiment, a plurality of opening shields 30a (two of them are exemplified in FIG. 6) are arranged at intervals, and only when there is an opening shield 30a Only the ball circulation group 60a is provided. In addition, in this embodiment, an inner channel 311a is formed on the inner peripheral wall 31a of the opening shield 30a, and the outer cylindrical wall 215 of the axial cylinder 21 is flat so that the inner channel 311a and the axial cylinder 21 The outer ring wall 215 together forms an outer ball channel.

However, the inner channel 311a of this embodiment is different from the first embodiment. Please refer to FIGS. 6-8 at the same time. In this embodiment, the outer ball channel and the central axis C are perpendicular to each other. As can be seen from FIG. 8, in this embodiment, the inner channel 311a as the outer ball channel is the inner channel 311a that is circumferentially arranged on the inner peripheral wall 31a in the radial direction, and the inner channel 311a is clearly visible from the bottom view The direction of the channel is the up-down direction shown on the drawing (the style of the inner channel 311a is commonly known as straight groove). Project the inner channel 311a and the central axis C in the upward direction. In the planar projection formed by the upward direction, the inner channel 311a and the central axis C will be perpendicular to each other, that is, the angle A1 between them is Right angle. Similarly, if the inner channel 311a and the central axis C are projected in the above-mentioned plan direction P, in the planar projection formed by the plan direction P, the inner channel 311a and the central axis C will be perpendicular to each other, that is to say, the two The angle between them is right angle.

In addition, as is clear from FIGS. 6 and 7, the first circulator 40a is plural, and the second circulator 50a is plural. In this embodiment, to match the number of opening shields 30a, there are two first circulators 40a and two second circulators 50a shown in the figure. The two first circulators 40a are disposed on the first axial wall 212 corresponding to the opening shield 30a. The first circulator 40a includes a first curve 41a. The two ends of the first curve 41a will respectively communicate with the inner spiral channel 2141 (inner ball channel) and the inner channel 311a (outer ball channel). The two second circulators 50a are disposed on the second axial wall 213 corresponding to the opening shield 30a. The second circulator 50a includes a second bend 51a, and two ends of the second bend 51a respectively communicate with the inner spiral channel 2141 (inner ball channel) and the inner channel 311a (outer ball channel). Through the first circulator 40a and the second circulator 50a that can be provided in correspondence with the opening shield 30a, the opening shield 30a, the first circulator 40a, and the second circulator 50a can be set to be modularized in the opening The required number of opening shields 30a, the first circulator 40a, and the second circulator 50a can be provided in the required positions of the nut 20, which can also reduce the overall load, and can also be more flexible and flexible.

In addition, the application range of the miniaturized first circulator 40a and second circulator 50a may be wider. For example, the first circulator 40a and the second circulator 50a in this embodiment may also be disposed in the structure of the longer opening shield 30 shown in the first embodiment. As long as a plurality of first circulators 40a and second circulators 50a are provided, the same structure and effect can also be achieved.

Next, referring to FIG. 9, another difference between this embodiment and the first embodiment is that in this embodiment, the first curve 41a is disposed obliquely with respect to the short side of the first circulator 40a, and the second The curve 51a is disposed obliquely with respect to the short side of the second circulator 50a. Since the first circulator 40a and the second circulator 50a have the same structure, only the second circulator 50a is used as an example for illustration in FIG. 9. From the perspective of the top view of FIG. 9, it can be more clearly understood that when the second bend 51a of the second circulator 50a is plural, the second bends 51a are arranged parallel to each other, and the top to bottom of the drawing is from right to Oblique setting with left tilt. Similarly, there are a plurality of first curves 41a, and each first curve 41a will be arranged parallel to each other. If the first circulator 40a is moved to the same angle of view as the second circulator 50a, that is, when the opening is up, the first curve 41a is also arranged obliquely from right to left from top to bottom.

Although the present invention is disclosed as above with the foregoing embodiments, it is not intended to limit the present invention. Anyone who is familiar with the similar technology can make some changes and retouching without departing from the spirit and scope of the present invention. The scope of patent protection shall be determined by the scope of the patent application attached to this specification.

10: Guide 11: Threaded channel 20: Open nut 21: Axial cylinder 211: Axial opening 212: first axial wall 213: Second axial wall 214: inner ring wall 2141: inner spiral channel 215: outer ring wall 30, 30a: opening guard 31, 31a: inner peripheral wall 311, 311a: inner channel 40, 40a: the first circulator 41, 41a: the first curve 50, 50a: second circulator 51, 51a: Second curve 60, 60a: Ball circulation group 61: Steel Ball A, A1: Angle C: central axis P: Overlooking direction

[Figure 1] This is a perspective view of the ball circulation guide device according to the first embodiment of the present invention; [FIG. 2] This is an exploded view of the ball circulation guide device according to the first embodiment of the present invention; [FIG. 3] This is an exploded view of the ball circulation guide device of the first embodiment of the present invention from another perspective; [FIG. 4] This is a bottom view of the opening sleeve according to the first embodiment of the present invention; [FIG. 5] A top view of the second circulator according to the first embodiment of the present invention; [FIG. 6] This is an exploded view of the ball circulation guide device according to the second embodiment of the present invention; [FIG. 7] This is an exploded view of the ball circulation guide device of the second embodiment of the present invention from another perspective; [FIG. 8] This is a bottom view of the opening sleeve according to the second embodiment of the present invention; and 9 is a top view of a second circulator according to the second embodiment of the present invention.

10: Guide

11: Threaded channel

20: Open nut

21: Axial cylinder

211: Axial opening

213: Second axial wall

214: inner ring wall

2141: inner spiral channel

215: outer ring wall

30: opening guard

31: Inner peripheral wall

311: inner channel

40: The first circulator

41: First corner

50: second circulator

51: Second corner

60: Ball circulation group

61: Steel Ball

P: Overlooking direction

Claims (11)

A ball circulation guide device, including: A guide piece having a central axis and a plurality of spiral grooves, the spiral grooves are arranged around the outer circumference of the guide piece; An open nut is slipped on the guide member, the open nut includes an axial cylinder, the axial cylinder has an axial opening, and the axial cylinder opens in the axial direction A first axial wall and a second axial wall are provided on opposite sides, the axial cylinder includes an inner ring wall and an outer ring wall, the inner ring wall has a plurality of inner spiral grooves, and the inner spiral grooves The channels and the spiral grooves of the guide correspond to each other and together form a plurality of inner ball channels; A plurality of opening shields, each of the opening shields is coaxially sleeved on the outer periphery of the axial cylinder, each of the opening shields has an inner peripheral wall, the inner peripheral wall and the outer ring wall of the axial cylinder are mutually Correspondingly and jointly forming an outer ball channel, the outer ball channels are projected in a plane formed by a radial direction, and the outer ball channels are perpendicular to the central axis; A first circulator is disposed on the first axial wall. The first circulator includes a plurality of first bends, and two ends of each of the first bends respectively correspond to one of the inner ball channels and the One of the outer ball channels; A second circulator is disposed on the second axial wall. The second circulator includes a plurality of second bends, and the two ends of the second bends respectively correspond to one of the inner ball channels and the One of the outer ball channels; and A plurality of ball circulation groups, each of the ball circulation groups including a plurality of steel balls, wherein one of the inner ball channels, one of the first bends, one of the outer ball channels and one of the second bends Together forming a first ball circulation channel, the other of the inner ball channels, the other of the first bends, the other of the outer ball channels and the other of the second bends together form a first In the two ball circulation channels, one of the ball circulation groups rolls in the first ball circulation channel, and the other of the ball circulation groups rolls in the second ball circulation channel. A ball circulation guide device, including: A guide piece having a central axis and a plurality of spiral grooves, the spiral grooves are arranged around the outer circumference of the guide piece; An open nut is slipped on the guide member, the open nut includes an axial cylinder, the axial cylinder has an axial opening, and the axial cylinder opens in the axial direction A first axial wall and a second axial wall are provided on opposite sides, the axial cylinder includes an inner ring wall and an outer ring wall, the inner ring wall has a plurality of inner spiral grooves, and the inner spiral grooves The channels and the spiral grooves of the guide correspond to each other and together form a plurality of inner ball channels; A plurality of opening shields, each of the opening shield sleeves is coaxially arranged on the outer periphery of the axial cylinder, each of the opening shields has an inner peripheral wall, the inner peripheral wall and the outer ring wall of the axial cylinder are mutually Correspondingly and jointly forming an outer ball channel, the outer ball channels are in a plane projection, each of the outer ball channels is disposed obliquely with respect to the central axis, the plane is the same as when viewing the opening shields from one end of the central axis One of the planes of symmetry is perpendicular to each other and parallel to the central axis; A first circulator is disposed on the first axial wall. The first circulator includes a plurality of first bends, and two ends of each of the first bends respectively correspond to one of the inner ball channels and the One of the outer ball channels; A second circulator is disposed on the second axial wall. The second circulator includes a plurality of second bends, and the two ends of the second bends respectively correspond to one of the inner ball channels and the One of the outer ball channels; and A plurality of ball circulation groups, each of the ball circulation groups including a plurality of steel balls, wherein one of the inner ball channels, one of the first bends, one of the outer ball channels and one of the second bends Together forming a first ball circulation channel, the other of the inner ball channels, the other of the first bends, the other of the outer ball channels and the other of the second bends together form a first In the two ball circulation channels, one of the ball circulation groups rolls in the first ball circulation channel, and the other of the ball circulation groups rolls in the second ball circulation channel. The ball circulation guide device according to claim 1 or 2, wherein the first circulator is plural and the second circulator is plural. The ball circulation guide device according to claim 1 or 2, wherein the inner peripheral wall and the outer ring wall of one of the opening shields further form another outer ball channel, and one of the first bends The two ends respectively correspond to one of the inner ball channels and the other outer ball channel, and the two ends of one of the second curved channels respectively correspond to one of the inner ball channels and the other outer ball channel. One of the inner ball channels, one of the first curved channels, the other outer ball channel and one of the second curved channels together form a third ball circulation channel, and one of the ball circulation groups rolls on the The third ball circulation channel. The ball circulation guide device according to claim 1 or 2, wherein the first bends are disposed obliquely with respect to the short side of the first circulator, and the second bends are relative to the second circulator The short side is set diagonally. The ball circulation guide device according to claim 2, wherein the first bends and the short sides of the first circulator are parallel to each other, and the second bends and the short sides of the second circulator are mutually Set in parallel. The ball circulation guide device according to claim 1 or 2, wherein the first bend of the first circulator is plural, each of the first bends is arranged parallel to each other, and the first There are a plurality of second curves, and the second curves are arranged parallel to each other. The ball circulation guide device according to claim 1 or 2, further comprising a ball retainer, the balls are connected in series by the ball retainer. The ball circulation guide device according to claim 1 or 2, wherein the outer ring wall of the axial cylinder has a plurality of outer channels to form the outer ball channels together with the inner peripheral walls. The ball circulation guide device according to claim 9, wherein the inner peripheral wall of each of the opening shields has an inner channel, and is corresponding to the outer channels, so that the outer channels and the The inner channels correspond to the outer ball channels. The ball circulation guide device according to claim 1 or 2, wherein the inner peripheral wall of each of the opening shields has an inner channel to form the outer walls together with the outer ring wall of the axial cylinder Ball channel.

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