Ball circulation guide

Abstract

The present invention discloses a ball circulation guide device, which includes a guide member, an open nut, a plurality of open shields, a first circulator, a second circulator and a plurality of ball circulation groups. The open nut is inserted and slidably disposed on the guide member. The open nut includes an axial cylinder, which has an axial opening. The inner spiral groove of the axial cylinder and the spiral groove of the guide member correspond to each other and jointly form an inner ball channel. A plurality of open shields are axially sleeved on the outer periphery of the axial cylinder, and the inner circumferential wall of each open shield corresponds to the outer annular wall of the axial cylinder and jointly form an outer ball channel. The first circulator and the second circulator are arranged on the axial cylinder corresponding to the open shields. Among them, the inner ball channel, the first bend, the outer ball channel and the second bend jointly form a ball circulation channel, and the ball circulation group rolls in the ball circulation channel.

Description

Technical Field

[0001] The invention relates to a ball circulation guide device, in particular to a ball circulation guide device with an open nut having an axial opening. Background Art

[0002] Today's ball screw devices convert rotational motion into linear motion through the cooperation of the screw and nut. The balls rolling in the circulation path of the ball nut cooperate with the screw with spiral grooves to reduce the friction generated between the ball nut and the screw when they move relative to each other.

[0003] Most existing ball nuts are in the shape of a complete cylinder. When the screw is long and a support seat is provided to prevent the screw from sagging, a retreat mechanism needs to be provided on the support seat. When the ball nut rotates on the screw and passes through the support seat, the support seat is temporarily moved away from the screw by the retreat mechanism. After the ball nut passes, the retreat mechanism returns the support seat to the supporting position to provide the support force required by the screw.

[0004] However, the above method requires, on the one hand, an additional retreat mechanism to be provided on each support seat. On the other hand, when each support seat is away from the screw, if the section of the screw sags due to its own weight, the screw may have additional shaking when the ball nut passes through the section of the screw, or the ball may be unable to roll in the thread groove due to the bending of the screw, thereby affecting the manufacturing accuracy when actually used in the process. Summary of the invention

[0005] In view of this, the present invention provides a ball circulation guide device in one embodiment, including a guide member, an open nut, a plurality of open shields, a first circulator, a second circulator, and a plurality of ball circulation groups. The guide member has a central axis and a plurality of spiral grooves. The spiral groove is arranged around the outer circumference of the guide member. The open nut is passed through and slid on the guide member. The open 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 annular wall and an outer annular wall, and the inner annular wall has an inner spiral groove, and the inner spiral groove corresponds to the spiral groove of the guide member and forms an inner ball channel together.

[0006] A plurality of open shields are coaxially sleeved on the outer periphery of the axial cylinder, and each open shield has an inner peripheral wall. The inner peripheral wall corresponds to the outer ring wall of the axial cylinder and forms an outer ball channel together. In the plane projection of the outer ball channel formed by the radial direction, each outer ball channel is perpendicular to the central axis.

[0007] The first circulator is arranged on the first axial wall, and the first circulator includes a plurality of first bends. The two ends of each first bend correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels respectively. The second circulator is arranged on the second axial wall. The second circulator includes a plurality of second bends, and the two ends of each second bend correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels respectively. Each ball circulation group includes a plurality of steel balls. Among them, one of the plurality of inner ball channels, one of the plurality of first bends, one of the plurality of outer ball channels and one of the plurality of second bends together form the first ball circulation channel, and another of the plurality of inner ball channels, another of the plurality of first bends, another of the plurality of outer ball channels and another of the plurality of second bends together form the second ball circulation channel. One of the plurality of ball circulation groups rolls in the first ball circulation channel, and another of the plurality of ball circulation groups rolls in the second ball circulation channel.

[0008] In another embodiment, the present invention provides a ball circulation guide device including a guide member, an open nut, a plurality of open shields, a first circulator, a second circulator and a plurality of ball circulation groups. The guide member has a central axis and a plurality of spiral grooves. The spiral groove is arranged around the outer circumference of the guide member. The open nut is passed through and slid on the guide member. The open nut includes an axial cylinder having 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 annular wall and an outer annular wall, the inner annular wall having an inner spiral groove, the inner spiral groove and the spiral groove of the guide member correspond to each other and together form a plurality of inner ball channels.

[0009] A plurality of open shields are coaxially sleeved on the outer periphery of the axial cylinder, and each open shield has an inner peripheral wall. The inner peripheral wall corresponds to the outer ring wall of the axial cylinder and forms an outer ball channel together. In the plane projection of the outer ball channel, each outer ball channel is arranged obliquely relative to the central axis, and the plane and the symmetry plane when the open shield is viewed from one end of the central axis are perpendicular to each other and parallel to the central axis.

[0010] The first circulator is arranged on the first axial wall, and the first circulator includes a plurality of first bends. The two ends of each first bend correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels respectively. The second circulator is arranged on the second axial wall. The second circulator includes a plurality of second bends, and the two ends of each second bend correspond to one of the plurality of inner ball channels and one of the plurality of outer ball channels respectively. Each ball circulation group includes a plurality of steel balls. Among them, one of the plurality of inner ball channels, one of the plurality of first bends, one of the plurality of outer ball channels and one of the plurality of second bends together form the first ball circulation channel, and another of the plurality of inner ball channels, another of the plurality of first bends, another of the plurality of outer ball channels and another of the plurality of second bends together form the second ball circulation channel. One of the plurality of ball circulation groups rolls in the first ball circulation channel, and another of the plurality of ball circulation groups rolls in the second ball circulation channel.

[0011] Since the axial barrel of the open nut has an axial opening, when the open nut is set on the guide (such as a screw or a conversion rod) and moved, even if a support seat is set below the guide, the open nut can pass through the support seat through the axial opening without interfering with the support seat. In this way, there is no need to set a retreat mechanism on the support seat. And when the open nut passes through the support seat, the support seat can maintain the state of supporting the guide member, and will not cause the guide member to sag and deform due to the departure of the support seat, affecting the manufacturing accuracy when it is actually used in the process. In addition to forming an outer ball channel together with the axial barrel so that the steel ball rolls in the outer groove, the open shield can also provide dust prevention.

[0012] By using the modular opening shield, the first circulator and the second circulator, the required number of opening shields, the first circulator and the second circulator can be set at the required place. For example, for a shorter or lightweight carrier, one or two sets of opening shields, the first circulator and the second circulator can be used in combination. For a longer or heavier carrier, multiple sets of opening shields, the first circulator and the second circulator can be set at appropriate positions for use. The modular design allows for greater flexibility in application and better meets needs.

[0013] In some embodiments, the number of first circulators is plural, and the number of second circulators is plural.

[0014] In some embodiments, the inner peripheral wall and the outer ring wall of one of the plurality of opening shields further form another outer ball channel. The two ends of one of the plurality of first bends correspond to and are connected to one of the plurality of inner ball channels and another outer ball channel, respectively. The two ends of one of the plurality of second bends correspond to and are connected to one of the plurality of inner ball channels and another outer ball channel, respectively. One of the plurality of inner ball channels, one of the plurality of first bends, another 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.

[0015] In some embodiments, the first bend is disposed obliquely relative to a short side of the first circulator, and the second bend is disposed obliquely relative to a short side of the second circulator.

[0016] In some embodiments, each first bend is disposed parallel to a short side of the first circulator, and each second bend is disposed parallel to a short side of the second circulator.

[0017] In some embodiments, the ball circulation guide device further includes a ball retainer, and a plurality of steel balls are connected in series by the ball retainer.

[0018] In some embodiments, the outer annular wall of the axial cylinder has a plurality of outer grooves to form an outer ball channel together with the plurality of inner circumferential walls. Further, in some embodiments, the inner circumferential wall of each opening shield has an inner groove, and is arranged corresponding to the plurality of outer grooves, so that the plurality of outer grooves and the plurality of inner grooves correspond to form an outer ball channel.

[0019] In some embodiments, the inner peripheral wall of each opening shield has an inner groove to form a plurality of outer ball channels together with the outer annular wall of the axial cylinder.

[0020] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable anyone familiar with the relevant skills to understand the technical content of the present invention and implement it accordingly. Moreover, according to the contents disclosed in this specification, the claims and the drawings, any person familiar with the relevant skills can easily understand the relevant purposes and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the ball circulation guide device according to the first embodiment of the present invention;

[0022] Figure 2 An exploded view of the ball circulation guide device according to the first embodiment of the present invention;

[0023] Figure 3 An exploded view of the ball circulation guide device according to the first embodiment of the present invention from another perspective;

[0024] Figure 4 A bottom view of the split sleeve of the first embodiment of the present invention;

[0025] Figure 5 A top view of the second circulator of the first embodiment of the present invention;

[0026] Figure 6 An exploded view of the ball circulation guide device according to the second embodiment of the present invention;

[0027] Figure 7 An exploded view of the ball circulation guide device according to the second embodiment of the present invention from another perspective;

[0028] Figure 8 A bottom view of the split sleeve according to the second embodiment of the present invention; and

[0029] Fig. 9 It is a top view of the second circulator according to the second embodiment of the present invention.

[0030] Wherein, the reference numerals are:

[0031] 10 Guide 11 Spiral groove

[0032] 20 Open nut 21 Axial cylinder

[0033] 211 axial opening 212 first axial wall

[0034] 213 second axial wall 214 inner annular wall

[0035] 2141 inner spiral groove 215 outer ring wall

[0036] 30, 30a Opening shield 31, 31a Inner peripheral wall

[0037] 311, 311a inner channel 40, 40a first circulator

[0038] 41, 41a First bend 50, 50a Second circulator

[0039] 51, 51a Second bend 60, 60a Ball circulation group

[0040] 61 Steel ball A, A1 Angle

[0041] C Center axis P Top view direction DETAILED DESCRIPTION

[0042] Please read first Figures 1 to 5 , Figure 1 This is a three-dimensional diagram of the ball circulation guide device according to the first embodiment of the present invention. Figure 2 This is an exploded view of the ball circulation guide device according to the first embodiment of the present invention. Figure 3 This is an exploded view of the ball circulation guide device according to the first embodiment of the present invention from another perspective. Figure 4 This is a bottom view of the split sleeve of the first embodiment of the present invention, Figure 5 This is a top view of the second circulator according to the first embodiment of the present invention.

[0043] Depend on Figure 1 and Figure 2 It can be seen that in this embodiment, the ball circulation guide device includes a guide member 10, an open nut 20, a plurality of open shields 30, a first circulator 40, a second circulator 50, and a plurality of ball circulation groups 60. The guide member 10 can be, for example, a screw or a conversion rod. In this embodiment, a screw is used as an example. Figure 1 It can be seen that the guide member 10 has a central axis C and a spiral groove 11 .

[0044] Depend on Figure 1 and Figure 2It can be seen that the split 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 annular wall 214 and an outer annular wall 215, and the inner annular wall 214 has an inner spiral groove 2141. The inner spiral groove 2141 and the spiral groove 11 of the guide member 10 correspond to each other and form an inner ball channel together. In detail, the guide member 10 has a spiral groove 11 arranged around the outer circumference of the guide member 10. The spiral groove 11 is arranged around the outer circumference of the guide member 10 at a desired helical angle. The split nut 20 is axially penetrated and slidable on the guide member 10, so that the inner spiral groove 2141 and the spiral groove 11 of the guide member 10 correspond to each other and form an inner ball channel together.

[0045] The open shield 30 is axially sleeved on the outer periphery of the axial cylinder 21. Each open shield 30 has an inner peripheral wall 31, and the inner peripheral wall 31 corresponds to the outer annular 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 groove 311 is formed on the inner peripheral wall 31 of each open shield 30, and the outer annular wall 215 of the axial cylinder 21 is a plane, so that the inner groove 311 and the outer annular wall 215 of the axial cylinder 21 form an outer ball channel together.

[0046] In other embodiments, an outer groove may be formed on the outer annular wall 215 of the axial cylinder 21. In this case, the outer groove and the inner circumferential wall 31 cooperate with each other to form an outer ball channel. Alternatively, in other embodiments, an outer groove may be provided on the outer annular wall 215 of the axial cylinder 21 and inner grooves 311 corresponding to each other may be provided on the inner circumferential wall 31 of each opening shield 30. When the opening shield 30 is correspondingly assembled on the axial cylinder 21, the inner groove 311 on the inner circumferential wall 31 and the outer groove of the outer annular wall 215 jointly form an outer ball channel.

[0047] In addition, the open shield 30 can form an outer ball channel together with the axial cylinder 21 so that the ball circulation group 60 can roll in the outer ball channel, and can also provide a dust-proof effect.

[0048] In this embodiment, Figure 2 and Figure 3 It can be seen that there are multiple inner spiral grooves 2141, but this is only for example. In practice, only one inner spiral groove 2141 may be provided according to the needs, but two or more inner spiral grooves 2141 may also be provided. Figure 2 and Figure 3 In order to make the drawings clear and concise, only one of them is marked as an example.

[0049] Next, please also refer to Figures 2 to 5In order to clearly represent each plane and axis, Figure 2 The three mutually perpendicular XYZ axes are provided to clarify the relationship between the various perspectives in the space, and the subsequent descriptions of the various drawings will also be based on these coordinate axes. Figure 2 and Figure 4 It can be seen that the central axis C of the guide member 10 extends along the X-axis direction. For the convenience of explanation, a symmetry plane is defined as a plane that makes the open shield 30 or the open nut 20 symmetrical when viewed from one end of the central axis C (for example, from one end of the X-axis to the positive direction of the X-axis), that is, Figure 2 The plane formed by the XZ axis is shown in . In addition, the direction along the Z axis from the top of the figure to the bottom (looking in the negative direction of the Z axis) is defined as the top view direction P. The plane perpendicular to the symmetry plane and parallel to the central axis C is Figure 2 The plane formed by the XY axes shown in is also the plane formed when observing from the top direction P.

[0050] The outer ball channel and the central axis C are arranged obliquely to each other. Figure 4 , which is a schematic diagram of viewing the opening shield 30 from the upward direction (toward the positive direction of the Z axis). Figure 4 It can be seen that in this embodiment, the inner groove 311 serving as the outer ball channel is an inner groove 311 arranged radially around the inner peripheral wall 31. When viewed from above, it can be clearly seen that the groove direction of each inner groove 311 is oblique (inclined from the upper right to the lower left, and the style of this inner groove 311 is commonly known as an oblique groove). Figure 4 It can be seen that when the inner channel 311 and the central axis C are projected in the upward direction, in the plane projection formed in the upward direction, the inner channel 311 is disposed obliquely relative to the central axis C, that is, the angle A between the two is not a right angle. Similarly, if the inner channel 311 and the central axis C are projected in the downward direction P and projected on a plane (i.e., on the plane formed by the XY axis), in the plane projection formed in the downward direction P, the inner channel 311 is disposed obliquely relative to the central axis C, that is, the angle between the two is not a right angle.

[0051] Furthermore, since the inner spiral groove 2141 and the inner groove 311 are both spirally arranged, when the two are spiral grooves with the same helix angle, that is, as shown in the present embodiment, when the inner spiral groove 2141 and the inner groove 311 are arranged parallel to each other, since the inclination angles of the two are the same, when the ball circulation group 60 rolls in the ball circulation channel, its load can roll more continuously and smoothly without the problem of excessive rolling angle conversion causing the rolling to be less continuous.

[0052] Next, please refer to 1 to Figure 3 and Figure 6, the first circulator 40 is arranged on the first axial wall 212. The first circulator 40 includes a plurality of first bends 41, and the two ends of each first bend 41 will correspond to one of the plurality of inner spiral grooves 2141 (inner ball channels) and one of the plurality of inner grooves 311 (outer ball channels). The second circulator 50 is arranged on the second axial wall 213. The second circulator 50 includes a plurality of second bends 51, and the two ends of each second bend 51 will correspond to one of the plurality of inner spiral grooves 2141 (inner ball channels) and one of the plurality of inner grooves 311 (outer ball channels). In this embodiment, by Figure 2 and Figure 3 It can be seen that there are multiple first bends 41 and multiple second bends 51. Figure 2 and Figure 3 In order to make the drawing clear and concise, only one of the first bend 41 and the second bend 51 is marked as an example.

[0053] The first circulator 40 and the second circulator 50 can be set on the first axial wall 212 and the second axial wall 213 by screwing, bonding or clamping. If they are fixed by screwing, when the first circulator 40 and the second circulator 50 are worn out due to long-term use, only the first circulator 40 and the second circulator 50 can be replaced without replacing the entire ball nut.

[0054] Furthermore, the first circulator 40 and the second circulator 50 shown in the present embodiment have the same structure, so that only one type of element needs to be manufactured during manufacturing, that is, it can be used as the first circulator 40 and the second circulator 50 at the same time. Of course, the first circulator 40 and the second circulator 50 with different structures can also be used according to 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 with different arrangements or arrangement spacings are used.

[0055] Then, by Figure 2 It can be seen 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 arranged from one end as the first, second, ... Nth. The inner grooves 311 (outer ball channels) arranged in sequence are also arranged from the same end as the first, second, ... Nth. The plurality of first bends 41 and the plurality of second bends 51 are also arranged from the same end as the first, second, ... Nth. Figure 1After the first circulator 40 and the second circulator 50 are assembled, the first first bend 41 of the first circulator 40 disposed on the first axial wall 212 of the axial cylinder 21 will be connected to the first inner ball channel and the first outer ball channel, and the first second bend 51 of the second circulator 50 disposed on the second axial wall 213 of the axial cylinder 21 will be connected to the first inner ball channel and the first outer ball channel. At this time, the first inner ball channel, the first first bend 41, the first outer spiral ball channel and the first second bend 51 will form the first ball circulation channel together. All the steel balls 61 in a set of ball circulation groups 60 will circulate and roll in the first ball circulation channel.

[0056] In this order, the second first bend 41 will be connected to the second inner ball channel and the second outer ball channel, and the second second bend 51 will be connected to the second inner ball channel and the second outer ball channel. At this time, the second inner ball channel, the second first bend 41, the second outer spiral ball channel and the second second bend 51 will 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.

[0057] By means of the above structure, by arranging the first circulator 40 and the second circulator 50 on the axial cylinder 21, the inner spiral groove 2141 on the inner ring wall 214 of the axial cylinder 21 and the inner groove 311 on the inner peripheral wall 31 can be connected through the first circulator 40 and the second circulator 50. At the same time, the ball circulation group 60 can be more smoothly in the process of rolling from the inner spiral groove 2141 to the inner groove 311.

[0058] At the same time, if Figure 2 and Figure 3 As shown, 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 requirements of light or heavy loads. For example, according to the requirements, only two sets of ball circulation groups can be used to set in two of the ball circulation channels, or more sets of ball circulation groups can be used, or the entire open nut 20 and the open shield 30 can be fully arranged to achieve light or heavy loads.

[0059] Next, please refer to Figure 2 and Figure 3 Here, a set of ball circulation group 60 is decomposed for illustration, which is also used to show the arrangement of the steel balls 61 of the ball circulation group 60 in the ball circulation channel. The ball circulation group 60 will form a ring along the inner ball channel, the first bend 41, the outer spiral ball channel and the second bend 51, and circulate in an independent ball circulation channel. In actual application, Figure 2 and Figure 3As shown in , multiple groups of ball circulation groups 60 can be set, and each group of ball circulation groups 60 will only continue to roll in the ball circulation channel in which it is set.

[0060] With the above structure, since the axial opening 211 is provided on the axial barrel 21 of the split nut 20, when the split nut 20 moves on the guide member 10, even if an additional support assembly (such as a support seat, not shown) is provided below the guide member 10, the split nut 20 can pass through the support assembly through the axial opening 211 without interfering with the support assembly. In this way, there is no need to provide a retreat mechanism on the support assembly, so that the support assembly retreats away from the guide member 10 when a general cylindrical ball nut is to pass through. And when the split nut 20 passes through the support assembly, the support assembly can maintain the state of supporting the guide member 10, and will not cause the guide member 10 to sag and deform, which will affect the manufacturing accuracy when it is actually used in the process.

[0061] like Figure 2 and Figure 3 It can be seen that in this embodiment, there are multiple ball circulation channels and multiple groups of ball circulation groups 60, which are respectively arranged in corresponding groups, and each group of ball circulation groups 60 circulates and rolls independently in the set ball circulation channels.

[0062] In other embodiments, the two ends of the first bend 41 may be connected to an inner ball channel and another outer ball channel respectively, and the two ends of the second bend 51 may be connected to an inner ball channel and another outer ball channel respectively. For example, one end of the first bend 41 may be connected to the inner spiral groove 2141 located in the first lane, and the other end may be connected to the inner groove 311 located in the third lane, instead of being connected to the inner groove 311 which is also the first lane. The two ends of the second bend 51 correspond to the connection mode of the first bend 41, with one end connected to the inner spiral groove 2141 located in the first lane, and the other end connected to the inner groove 311 located in the third lane. This can be achieved by adjusting the inclination of the first bend 41 and the second bend 51.

[0063] For example, if the first curve 41 is obliquely arranged relative to the short side of the first circulator 40, and the second curve 51 is obliquely arranged relative to the short side of the second circulator 50, by adjusting the inclinations of the first curve 41 and the second curve 51, the inner spiral groove 2141 can be connected to the inner groove 311 of a different lane to achieve the effect of skipping lanes.

[0064] In this way, the first inner ball channel, the first first bend 41, the third outer ball channel and the first second bend 51 together form the third ball circulation channel. The ball circulation group 60 arranged in the third ball circulation channel will circulate and roll in the first inner ball channel, the first first bend 41, the third outer ball channel and the first second bend 51. In this way, by setting 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 loads or light loads.

[0065] In this embodiment, since the inner spiral groove 2141 and the inner groove 311 are spiral grooves with the same spiral angle, the first bend 41 and the short side of the first circulator 40 are arranged parallel to each other, and the second bend 51 and the short side of the second circulator 50 are arranged parallel to each other. Since the first circulator 40 and the second circulator 50 are the same structure, Figure 5 Only the second circulator 50 is used as an example for explanation. Figure 5 The top view of the figure can more clearly understand that when there are multiple second bends 51 of the second circulator 50, each second bend 51 is arranged in parallel with each other, and is arranged straight from top to bottom, that is, it will be arranged parallel to the short side of the second circulator 50. Similarly, there are multiple first bends 41, and each first bend 41 will be arranged parallel to each other. If the first circulator 40 is moved to the same viewing angle as the second circulator 50, that is, when the opening is on top, the first bend 41 is also arranged straight from top to bottom, that is, it will be arranged parallel to the short side of the first circulator 40. Thereby, when the first bend 41 is to be formed on the first circulator 40, or when the second bend 51 is to be formed on the second circulator 50, it will be 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, the manufacture and demolding of the mold will be easier.

[0066] In addition, in this embodiment, the steel balls 61 provided in the ball circulation guide device do not need to be provided with a ball retainer, and can roll in each independent ball circulation channel under the limitation of the ball circulation channel formed by the guide 10, the open nut 20, the open shield 30, the first circulator 40 and the second circulator 50 without falling out of the ball circulation channel. However, in other embodiments, multiple steel balls 61 in the ball circulation group 60 can also be connected in series by providing a ball retainer.

[0067] Next, please refer to Figures 6 to 9 , Figure 6 This is an exploded view of the ball circulation guide device according to the second embodiment of the present invention. Figure 7 This is an exploded view of the ball circulation guide device according to the second embodiment of the present invention from another perspective. Figure 8 is a bottom view of the split sleeve of the second embodiment of the present invention, Fig. 9 FIG. 2 is a top view of the second circulator of the second embodiment of the present invention. The same elements as those of the first embodiment are represented by the same reference numerals and will not be described in detail.

[0068] First, the difference between this embodiment and the first embodiment is that the plurality of opening shields 30a ( Figure 6 In the embodiment, the inner circumferential wall 31a of the open shield 30a is formed with an inner groove 311a, and the outer annular wall 215 of the axial cylinder 21 is a plane, so that the inner groove 311a and the outer annular wall 215 of the axial cylinder 21 together form an outer ball channel.

[0069] However, the inner channel 311a of this embodiment is different from that of the first embodiment. Figures 6 to 8 In this embodiment, the outer ball channel is perpendicular to the central axis C. Figure 8 It can be seen that in this embodiment, the inner groove 311a serving as the outer ball channel is an inner groove 311a arranged radially around the inner peripheral wall 31a. It can be clearly seen from the bottom view that the groove direction of each inner groove 311a is the up-down direction shown in the figure (the style of this inner groove 311a is commonly known as a straight groove). The inner groove 311a and the central axis C are projected in the upward direction. In the plane projection formed in the upward direction, the inner groove 311a and the central axis C will be perpendicular to each other, that is, the angle A1 between the two is a right angle. Similarly, if the inner groove 311a and the central axis C are projected in the aforementioned top-down direction P, in the plane projection formed in the top-down direction P, the inner groove 311a and the central axis C will be perpendicular to each other, that is, the angle A1 between the two is a right angle.

[0070] In addition, by Figure 6 and Figure 7It can be clearly seen that there are multiple first circulators 40a and multiple second circulators 50a. In the present embodiment, in order to match the number of the opening shield 30a, there are two first circulators 40a and two second circulators 50a shown in the figure. The two first circulators 40a will be arranged on the first axial wall 212 corresponding to the opening shield 30a. The first circulator 40a includes a first bend 41a, and the two ends of the first bend 41a will correspond to the inner spiral groove 2141 (inner ball channel) and the inner groove 311a (outer ball channel) respectively. The two second circulators 50a will be arranged on the second axial wall 213 corresponding to the opening shield 30a. The second circulator 50a includes a second bend 51a, and the two ends of the second bend 51a will correspond to the inner spiral groove 2141 (inner ball channel) and the inner groove 311a (outer ball channel) respectively. By using the first circulator 40a and the second circulator 40a, 50a which can be arranged corresponding to the opening shield 30a, the opening shield 30a, the first circulator 40a and the second circulator 50a can be set to be modular, and the required number of opening shields 30a, the first circulator 40a and the second circulator 50a can be set at the required position of the opening nut 20, thereby reducing the overall load and allowing for more flexible and agile application.

[0071] In addition, the miniaturized first circulator 40a and the second circulator 50a can be applied more widely. For example, the first circulator 40a and the second circulator 50a in this embodiment can also be arranged in the structure of the relatively long opening shield 30 shown in the first embodiment. As long as a plurality of first circulators 40a and second circulators 50a are arranged, the same structure and function can be achieved.

[0072] Next, see Fig. 9 Another difference between this embodiment and the first embodiment is that, in this embodiment, the first bend 41a is disposed obliquely relative to the short side of the first circulator 40a, and the second bend 51a is disposed obliquely relative to the short side of the second circulator 50a. Since the first circulator 40a and the second circulator 50a are of the same structure, Fig. 9 Only the second circulator 50a is used as an example for explanation. Fig. 9 It can be more clearly understood from the top view that when there are multiple second bends 51a of the second circulator 50a, each second bend 51a is arranged in parallel with each other, and is arranged obliquely from right to left from top to bottom on the drawing. Similarly, when there are multiple first bends 41a, each first bend 41a will be arranged in parallel with each other. If the first circulator 40a is moved to the same viewing angle as the second circulator 50a, that is, when the opening is at the top, the first bend 41a is also arranged obliquely from right to left from top to bottom.

[0073] Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Anyone skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be subject to the scope defined by the claims attached to this specification.

Claims

1. A ball circulation guide device, characterized in that: include: A guide member having a central axis and a plurality of spiral grooves, wherein the spiral grooves are disposed around the outer circumference of the guide member; an open nut, which is inserted and slidably mounted on the guide member, the open nut comprising an axial cylinder having an axial opening, the axial cylinder being provided with a first axial wall and a second axial wall on opposite sides of the axial opening, the axial cylinder comprising an inner annular wall and an outer annular wall, the inner annular wall having a plurality of inner spiral grooves, the inner spiral grooves corresponding to the spiral grooves of the guide member and forming a plurality of inner ball channels together; A plurality of open shields, each of which is coaxially sleeved on the outer periphery of the axial cylinder, each of which has an inner peripheral wall, the inner peripheral wall and the outer ring wall of the axial cylinder correspond to each other and form an outer ball channel together, and in the plane projection of the outer ball channels formed by a radial direction, each of the outer ball channels is 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 are respectively connected to one of the inner ball channels and one of the outer ball channels; a second circulator, disposed on the second axial wall, the second circulator comprising a plurality of second bends, two ends of each of the second bends correspondingly connecting to one of the inner ball channels and one of the outer ball channels; and A plurality of ball circulation groups, each of the ball circulation groups comprises 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 form a first ball circulation channel, another of the inner ball channels, another of the first bends, another of the outer ball channels and another of the second bends together form a second ball circulation channel, one of the ball circulation groups rolls in the first ball circulation channel, and another of the ball circulation groups rolls in the second ball circulation channel.

2. A ball circulation guide device, characterized in that: include: A guide member having a central axis and a plurality of spiral grooves, wherein the spiral grooves are disposed around the outer circumference of the guide member; an open nut, which is inserted and slidably mounted on the guide member, the open nut comprising an axial cylinder having an axial opening, the axial cylinder being provided with a first axial wall and a second axial wall on opposite sides of the axial opening, the axial cylinder comprising an inner annular wall and an outer annular wall, the inner annular wall having a plurality of inner spiral grooves, the inner spiral grooves corresponding to the spiral grooves of the guide member and forming a plurality of inner ball channels together; A plurality of open shields, each of which is coaxially sleeved on the outer periphery of the axial cylinder, each of which has an inner peripheral wall, the inner peripheral wall and the outer ring wall of the axial cylinder correspond to each other and jointly form an outer ball channel, each of which is obliquely arranged relative to the central axis in a plane projection, and the plane is perpendicular to a symmetry plane when the open shields are viewed from one end of the central axis and is 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 are respectively connected to one of the inner ball channels and one of the outer ball channels; a second circulator, disposed on the second axial wall, the second circulator comprising a plurality of second bends, two ends of each of the second bends correspondingly connecting to one of the inner ball channels and one of the outer ball channels; and A plurality of ball circulation groups, each of the ball circulation groups comprises 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 form a first ball circulation channel, another of the inner ball channels, another of the first bends, another of the outer ball channels and another of the second bends together form a second ball circulation channel, one of the ball circulation groups rolls in the first ball circulation channel, and another of the ball circulation groups rolls in the second ball circulation channel.

3. The ball circulation guide device according to claim 1 or 2, characterized in that: The number of the first circulators is plural, and the number of the second circulators is plural.

4. The ball circulation guide device according to claim 1 or 2, characterized in that: The inner circumferential wall and the outer annular wall of one of the opening shields also form another outer ball channel, the two ends of one of the first bends are respectively connected to one of the inner ball channels and the other outer ball channel, the two ends of one of the second bends are respectively connected to one of the inner ball channels and the other outer ball channel, one of the inner ball channels, one of the first bends, the other outer ball channel and one of the second bends together form a third ball circulation channel, and one of the ball circulation groups rolls in the third ball circulation channel.

5. The ball circulation guide device according to claim 1 or 2, characterized in that: The first bends are disposed obliquely relative to the short side of the first circulator, and the second bends are disposed obliquely relative to the short side of the second circulator.

6. The ball circulation guide device according to claim 2, characterized in that: The first bends are arranged parallel to the short side of the first circulator, and the second bends are arranged parallel to the short side of the second circulator.

7. The ball circulation guide device according to claim 1 or 2, characterized in that: The first circulator has a plurality of first bends, each of which is arranged in parallel with each other. The second circulator has a plurality of second bends, each of which is arranged in parallel with each other.

8. The ball circulation guide device according to claim 1 or 2, characterized in that: The invention also comprises a ball retainer, wherein the steel balls are connected in series by the ball retainer.

9. The ball circulation guide device according to claim 1 or 2, characterized in that: The outer ring wall of the axial cylinder has a plurality of outer grooves to form the outer ball channels together with the inner peripheral walls.

10. The ball circulation guide device according to claim 9, characterized in that: The inner peripheral wall of each of the opening shields has an inner groove, and is arranged corresponding to the outer grooves, so that the outer grooves correspond to the inner grooves to form the outer ball channels.

11. The ball circulation guide device according to claim 1 or 2, characterized in that: The inner peripheral wall of each of the opening shields has an inner groove to form the outer ball channels together with the outer ring wall of the axial cylinder.

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