WO2020015743A1 - 线性致动结构 - Google Patents

线性致动结构 Download PDF

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Publication number
WO2020015743A1
WO2020015743A1 PCT/CN2019/096834 CN2019096834W WO2020015743A1 WO 2020015743 A1 WO2020015743 A1 WO 2020015743A1 CN 2019096834 W CN2019096834 W CN 2019096834W WO 2020015743 A1 WO2020015743 A1 WO 2020015743A1
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WIPO (PCT)
Prior art keywords
nut
pillar
shaft sleeve
screw
transmission
Prior art date
Application number
PCT/CN2019/096834
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English (en)
French (fr)
Inventor
吴伟凡
Original Assignee
捷世达企业股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201821159812.0U external-priority patent/CN208578949U/zh
Priority claimed from CN201821154937.4U external-priority patent/CN208578939U/zh
Application filed by 捷世达企业股份有限公司 filed Critical 捷世达企业股份有限公司
Publication of WO2020015743A1 publication Critical patent/WO2020015743A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms

Definitions

  • the invention relates to a linear actuation structure, in particular to a three-stage linear actuation structure having a lower post, a middle post, and an upper post.
  • Linear actuators are widely used in life, such as lifting tables and chairs, etc.
  • the height of the lifting tables and chairs can be adjusted by linear actuators to meet the needs of users.
  • the known linear actuator structure includes a lower post, a middle post, an upper post, and a linear mechanism.
  • the actuation of the linear mechanism can drive the displacement of the central post and the upper post to achieve a telescopic effect.
  • the lower pillar, the middle pillar, and the upper pillar are all hollow cylinders and are not connected to each other. When they are extended, they are supported only by the internal linear mechanism, which makes the structure of the linear actuator easy to be shaken by external forces. The phenomenon.
  • the invention provides a linear actuation structure.
  • the configuration of the first reinforcing set can effectively increase the stability of the linear actuation structure.
  • a linear actuation structure which includes a lower post, a middle post, an upper post, a driving unit, a linear mechanism, and a first reinforcing sleeve.
  • the lower pillar has an axial direction
  • the middle pillar is telescopically located in the lower pillar
  • the upper pillar is telescopically located in the middle pillar
  • the driving unit is located at one end of the lower pillar.
  • the linear mechanism is located in the lower column and is driven by the driving unit.
  • the linear mechanism includes a pipe tooth, a first nut, a middle pipe, a second nut, and a transmission group. One end of the tube is connected to the driving unit and is driven to rotate by the driving unit.
  • the first nut is sleeved on the tube, and the tube rotates to cause the first nut to be displaced in the axial direction.
  • the middle tube has a first end and a second end. The end is connected to the first nut; the second nut is connected to the second end of the middle pipe to move axially in synchronization with the first nut; the transmission group is telescopically located in the tube tooth, and the transmission group is connected to the upper column and driven to rotate by the tube tooth, The upper post is driven to move axially relative to the second nut.
  • the first reinforcing sleeve is connected between the center pillar and the first nut, so that the center pillar is linked by the first nut.
  • the central pillar and the upper pillar can be extended and contracted in the axial direction, and the structural configuration connected between the central pillar and the linear mechanism through the first reinforcing kit can be linearly actuated
  • the structure of the structure is more stable.
  • the aforementioned linear actuation structure may further include a second reinforcing sleeve set between the upper pillar and the middle tube, and the second reinforcing sleeve set is connected to the upper pillar.
  • the aforementioned linear actuation structure may further include a first sliding sheet and a second sliding sheet, the first sliding sheet is located between the lower pillar and the middle pillar, and the first sliding sheet includes a first bayonet passing through one of the middle pillars.
  • the first hole is used to fit a first card hole of the first reinforcing sleeve set; the second sliding piece is located between the middle post and the upper post, and the second sliding piece includes a second locking pin passing through a second The hole is fitted into a second card hole of the second reinforcing sleeve.
  • the first reinforcing sleeve group may include two first connecting blocks to be engaged with each other, and the second reinforcing sleeve group may include two second connecting blocks to be engaged with each other.
  • a first combination direction in which the two first connection blocks are engaged with each other may be perpendicular to a second combination direction in which the two second connection blocks are engaged with each other.
  • the transmission group may include a first fitting shaft sleeve, a screw, a second fitting shaft sleeve, and a transmission shaft, and the first fitting shaft sleeve is located in the tube and is in contact with the tube.
  • the screw is screwed by a second nut sleeve, and one end of the screw is connected to the upper post;
  • the second fitting shaft sleeve is located in the screw and fits with the screw; one end of the transmission shaft is connected to the first fitting shaft sleeve and the other end
  • the second fitting shaft sleeve is connected; when the pipe teeth rotate, the pipe teeth rotate with the first fitting shaft sleeve, so that the transmission shaft rotates with the second fitting shaft sleeve and the screw, and the screw drives the upper post Displace axially.
  • the first fitting shaft sleeve may include a first convex rib that protrudes outward along a radial direction of the first fitting shaft sleeve, and the tube includes a first inner wall insert. The groove is fitted correspondingly to the first convex rib.
  • the first fitting shaft sleeve may further include a plurality of first fitting teeth, which protrude inward along a radial direction of the first fitting shaft sleeve, and the transmission shaft includes a plurality of first engaging teeth located at one end of the transmission shaft. And respectively mesh with the first fitting teeth.
  • the second fitting shaft sleeve may include a second convex rib which protrudes outward along a radial direction of the second fitting shaft sleeve; and the screw includes a second inner wall recess Corresponding to the second rib.
  • the second fitting shaft sleeve may further include a plurality of second fitting teeth, which protrude inward along the radial direction of the second fitting shaft sleeve, and the transmission shaft includes a plurality of second engaging teeth, which are located at other portions of the transmission shaft. One end is respectively engaged with the second fitting teeth.
  • linear actuation structure further comprises a transmission nut which is connected to the other end of the pipe tooth and rotates in conjunction with the pipe tooth, wherein the transmission group is sleeved by the transmission nut and the transmission group is driven to rotate by the transmission nut.
  • the transmission group may further include a transmission sleeve, a screw and a sliding sleeve, the transmission sleeve is engaged with the transmission nut to be linked by the transmission nut, and the transmission sleeve includes an inner hole, the screw The screw is telescopically located in the inner hole, the screw is screwed by the second nut sleeve, one end of the screw is connected to the upper post, the sliding sleeve is sleeved to engage the other end of the screw, and the outer wall of the sliding sleeve is matched with the inner hole of the transmission shaft sleeve, where When the transmission shaft sleeve rotates in conjunction with the transmission nut, the transmission shaft sleeve drives the sliding sleeve linkage screw to move in the axial direction.
  • the transmission group may further include a screw baffle, which is sleeved on the screw and abuts on one end of the second nut, and the screw baffle is disposed on the transmission shaft sleeve.
  • the screw stopper may include two latching protrusions detachably engaged with two limiting holes of the transmission shaft sleeve.
  • a linear actuation structure which includes a lower post, a middle post, an upper post, a driving unit, a linear mechanism, and a first reinforcing sleeve.
  • the lower pillar has an axial direction
  • the middle pillar is telescopically located outside the lower pillar
  • the upper pillar is telescopically located outside the middle pillar
  • the drive unit is located at one end of the lower pillar.
  • the linear mechanism is located in the lower column and is driven by the driving unit.
  • the linear mechanism includes a pipe tooth, a first nut, a middle pipe, a second nut, and a transmission group. One end of the tube is connected to the driving unit and is driven to rotate by the driving unit.
  • the first nut is sleeved on the tube, and the tube rotates to cause the first nut to be displaced in the axial direction.
  • the middle tube has a first end and a second end. The end is connected to the first nut; the second nut is connected to the second end of the middle pipe to move axially in synchronization with the first nut; the transmission group is telescopically located in the tube tooth, and the transmission group is connected to the upper column and driven to rotate by the tube tooth, The upper post is driven to move axially relative to the second nut.
  • the first reinforcing sleeve is connected between the center pillar and the second nut, so that the center pillar is linked by the second nut.
  • the aforementioned linear actuation structure may further include a first sliding piece located between the upper pillar and the middle pillar.
  • the first sliding piece includes a first bayonet passing through a first hole of the middle pillar to fit the first patch.
  • a first card hole of the strong sleeve may further include a first sliding piece located between the upper pillar and the middle pillar.
  • the beneficial effect of the present invention is that the linear configuration of the center pillar and the top pillar can be extended and contracted in the axial direction by driving the linear mechanism through the driving unit, and the structural configuration connected between the center pillar and the linear mechanism through the first reinforcing set can Make the structure of the linear actuation structure more stable.
  • FIG. 1 is a schematic perspective view of a linear actuation structure according to an embodiment of the present invention.
  • FIG. 2 shows an exploded view of a portion of the linear actuation structure of FIG. 1;
  • FIG. 3 is a schematic exploded view of another part of the linear actuation structure of FIG. 1;
  • FIG. 3 is a schematic exploded view of another part of the linear actuation structure of FIG. 1;
  • FIG. 4 is a schematic partial cross-sectional view of the linear actuation structure of FIG. 1;
  • FIG. 5 is a schematic partial cross-sectional view of the linear actuation structure of FIG. 1;
  • FIG. 6 shows a schematic perspective view of a linear actuation structure according to another embodiment of the present invention.
  • FIG. 7 shows an exploded view of a portion of the linear actuation structure of FIG. 6.
  • FIG. 8 is a schematic partial cross-sectional view of the linear actuation structure of FIG. 6.
  • an element or mechanism or module, etc.
  • connection when an element (or mechanism or module, etc.) is "connected”, “set” or “coupled” to another element herein, it can mean that the element is directly connected, directly disposed, or directly coupled to another element, It can also mean that an element is indirectly connected, disposed indirectly, or indirectly coupled to another element, which means that other elements are interposed between the element and the other element.
  • an element when it is explicitly stated that an element is “directly connected”, “directly set” or “directly coupled” to another element, it means that no other element is interposed between the element and the other element.
  • the terms such as first, second, and third are only used to describe different components or components, and there are no restrictions on the components / components themselves.
  • the first component / component can also be renamed as the second component / component.
  • the combination of components / components / mechanisms / modules in this article is not a generally known, conventional or well-known combination in this field. You cannot determine whether the combination relationship is easy to be detected by the component or component / mechanism / module itself. Those skilled in the art can easily do this.
  • FIG. 1 shows a schematic perspective view of a linear actuation structure 10 according to an embodiment of the present invention
  • FIG. 2 shows the linear actuation of FIG. 1.
  • a partially exploded schematic diagram of the structure 10 FIG. 3 shows another partially exploded schematic diagram of the linear actuated structure 10 of FIG. 1
  • FIG. 4 shows a partial cross-sectional schematic diagram of the linear actuated structure 10 of FIG. 1, and FIG.
  • the linear actuation structure 10 includes a lower pillar 100, a middle pillar 200, an upper pillar 300, a driving unit 900, a linear mechanism 600, and a first reinforcing sleeve 400.
  • the lower pillar 100 has an axial direction I1
  • the middle pillar 200 is telescopically located in the lower pillar 100
  • the upper pillar 300 is telescopically located in the middle pillar 200
  • the driving unit 900 is located at one end of the lower pillar 100.
  • the linear mechanism 600 is located in the lower pillar 100 and is driven by the driving unit 900.
  • the linear mechanism 600 includes a pipe tooth 620, a first nut 630, a middle pipe 610, a second nut 640, and a transmission group 660.
  • One end of the die 620 is connected to the driving unit 900 and is driven to rotate by the driving unit 900.
  • the first nut 630 is sleeved on the pipe 620, and the pipe 620 rotates to displace the first nut 630 in the axial direction I1.
  • the middle tube 610 has a first end (not labeled) and a second end (not labeled). The first end is connected to the first nut 630.
  • the second nut 640 is connected to the second end of the middle pipe 610 to be displaced in the axial direction I1 in synchronization with the first nut 630.
  • the transmission group 660 is telescopically located in the pipe teeth 620.
  • the transmission group 660 is connected to the upper column 300 and is driven to rotate by the pipe teeth 620 to drive the upper column 300 to move in the axial direction I1 relative to the second nut 640.
  • the first reinforcing sleeve set 400 is connected between the center pillar 200 and the first nut 630, so that the center pillar 200 is linked by the first nut 630.
  • the actuation of the linear mechanism 600 by the driving unit 900 can cause the center pillar 200 and the upper pillar 300 to expand and contract in the axial direction I1, and is connected between the center pillar 200 and the linear mechanism 600 through the first reinforcement kit 400.
  • the structural relationship can make the structure of the linear actuation structure 10 more stable. Details of the linear actuation structure 10 and the manner of operation will be described later.
  • the inner diameters of the lower pillar 100, the middle pillar 200, and the upper pillar 300 decrease in order, so that the central pillar 200 can be located inside the lower pillar 100 and can be telescopically operated, and the upper pillar 300 can be located inside the central pillar 200 and can be telescopically moved.
  • the driving unit 900 may include a motor 910, a worm gear 920, and a coupling group (not shown).
  • the coupling group is connected between the worm gear 920 and the pipe tooth 620, and the axis of the motor 910 has a worm structure. Engaged with the worm gear 920, so the rotation of the motor 910 can drive the worm gear 920 to rotate, and then drive the pipe teeth 620 to rotate.
  • the outer wall of the pipe 620 has an external thread and can be screwed with the internal thread of the first nut 630.
  • the first nut 630 is restricted by its connection relationship with the center pillar 200 and cannot follow the rotation, so the first nut 630 can only be displaced in the axial direction I1. Therefore, the first nut 630 can drive the center pillar 200, the middle tube 610, and the second nut 640 to be displaced relative to the lower pillar 100 along the axial direction I1.
  • the linear mechanism 600 may further include a tube nut 650 at the other end of the tube 620.
  • the transmission group 660 when the pipe teeth 620 are rotated, the transmission group 660 is driven to rotate, thereby driving the upper pillar 300 to move relative to the center pillar 200.
  • the transmission group 660 may include a first fitting shaft sleeve 661, a screw 664, a second fitting shaft sleeve 663, and a transmission shaft 662.
  • the first fitting shaft sleeve 661 is located in the pipe 620 and is The pipe 620 is fitted; the screw 664 is threaded by a second nut 640, and one end of the screw 664 is connected to the upper post 300; the second fitting shaft sleeve 663 is located in the screw 664 and is fitted with the screw 664; one end of the transmission shaft 662 The first fitting shaft sleeve 661 is connected and the other end is connected to the second fitting shaft sleeve 663.
  • the pipe 620 rotates, the pipe 620 rotates in conjunction with the first fitting shaft sleeve 661 to rotate the transmission shaft 662 in conjunction with the second fitting shaft sleeve 663 and the screw 664, so that the screw 664 drives the upper column 300 Displace along the axis I1.
  • the first fitting shaft sleeve 661 may include four first protruding ribs 6611, which protrude outward along a radial direction (not shown) of the first fitting shaft sleeve 661, and the tube 620 includes four first An inner wall embedding groove 621 and four first inner wall embedding grooves 621 are respectively fitted into the four first ribs 6611.
  • the first fitting shaft sleeve 661 may further include a plurality of first fitting teeth 6612, which protrude inward along a radial direction of the first fitting shaft sleeve 661, and the transmission shaft 662 includes a plurality of first engaging teeth 6621. It is located at one end of the transmission shaft 662 and meshes with the first fitting teeth 6612 respectively.
  • the second fitting shaft sleeve 663 may include a plurality of second protruding ribs 6631 that protrude outward along a radial direction (not shown) of the second fitting shaft sleeve 663; and the screw 664 includes a plurality of second inner wall inserts.
  • the grooves 6641 are respectively fitted to the second protruding ribs 6631.
  • the second fitting shaft sleeve 663 may further include a plurality of second fitting teeth 6632, which protrude inward along a radial direction of the second fitting shaft sleeve 663, and the transmission shaft 662 includes a plurality of second engaging teeth 6622. The other end of the transmission shaft 662 is engaged with the second fitting teeth 6632 respectively.
  • the first fitting shaft sleeve 661 can be fitted into the pipe 620, and the first fitting shaft sleeve 661 can be driven when the pipe 620 rotates. move. And because the first fitting tooth 6612 is engaged with the first bite tooth 6621, the transmission shaft 662 can be rotated when the first fitting shaft sleeve 661 is rotated.
  • the second fitting tooth 6632 meshes with the second engaging tooth 6622
  • the second fitting shaft sleeve 663 is connected to the transmission shaft 662
  • the second protruding rib 6631 is fitted with the second inner wall recess 6641, so that the first The two fitting shaft sleeves 663 are fitted to the screw 664, which can cause the transmission shaft 662 to interlock with the second fitting shaft sleeve 663 and the rotation of the screw 664.
  • the number of the first raised rib, the first inner wall recessed groove, the second raised rib, and the second inner wall recessed groove is at least one, which is not limited thereto.
  • the outer wall of the screw 664 has an external thread and can be screwed to the internal thread of the second nut 640.
  • the screw 664 rotates in conjunction with the transmission shaft 662, the second nut 640 cannot be rotated due to its connection relationship with the middle tube 610, so the screw 664 can be displaced in the axial direction I1 relative to the second nut 640. Therefore, the screw 664 can drive the upper pillar 300 to be displaced in the axial direction I1 relative to the middle pillar 200 and the lower pillar 100.
  • the linear actuation structure 10 may further include a second reinforcing sleeve 500 between the upper pillar 300 and the middle pipe 610, and the second reinforcing sleeve 500 is connected to the upper pillar 300.
  • the linear actuation structure 10 may further include four first sliding sheets 800 and four second sliding sheets 700.
  • Each first sliding sheet 800 is located between the lower pillar 100 and the middle pillar 200.
  • Each first sliding sheet 800 includes two The first locking pin 810 passes through two first holes (not shown) of the center pillar 200 to fit the two first locking holes 411 of the first reinforcing sleeve set 400.
  • Each second sliding sheet 700 is located between the center pillar 200 and the upper pillar 300.
  • Each second sliding sheet 700 includes two second locking pins 710 passing through two second holes (not shown) of the upper pillar 300 for fitting.
  • first reinforcing sleeve set 400 may include two first connecting blocks 410 to engage with each other
  • second reinforcing sleeve set 500 may include two second connecting blocks 510 to engage with each other.
  • the two first connection blocks 410 have the same shape, and each of the first connection blocks 410 includes half of the inner wall of the pipe (not labeled), two end faces (not labeled), two latching grooves 412, two latches 413, and two blinds.
  • the hole 414, the clamping groove 412 is located on the inner wall of the half pipe and is used for engaging the radial ribs 631 of the first nut 630, the two tenons 413 are located on one end surface, and the two blind holes 414 are located on the other end surface. Therefore, during assembly, the two clamping slots 412 of the first first connection block 410 can be aligned with the two radial ribs 631 of the first nut 630, and the two of the second first connection block 410 can be aligned.
  • the slot 412 is aligned with the other two radial ribs 631 of the first nut 630, and the two tenons 413 of the first first connection block 410 are engaged with the two blinds of the second first connection block 410.
  • Hole 414, and the two tongues 413 of the second first connection block 410 are engaged with the two blind holes 414 of the first first connection block 410, so as to complete the connection of the first reinforcing sleeve 400.
  • Each first connection block 410 may further include a side surface (not labeled), two connection surfaces (not labeled), and four first card holes 411.
  • the two connection surfaces are respectively connected between the side surfaces and the end surfaces.
  • One card hole 411 is located on two connecting surfaces, and the other two first card holes 411 are located on the side. Therefore, after the two first connection blocks 410 are combined with each other, the first card hole 411 on the connection surface of the first first connection block 410 and the first card hole 411 on the connection surface of the second first connection block 410.
  • the two first locking pins 810 for the same first sliding piece 800 can be engaged respectively.
  • the structure of the second connection block 510 differs from that of the first connection block 410 only in that the second connection block 510 does not include a card slot.
  • the number of holes is at least one, and between the first first connection block and the second first connection block, between the first second connection block and the second second connection block, or the first reinforcement sleeve
  • the connection mode between the group and the first nut may be a lock connection or other detachable connection mode, and is not limited to the above disclosure.
  • a first combination direction R1 where the two first connection blocks 410 are engaged with each other may be perpendicular to a second combination direction R2 where the two second connection blocks 510 are engaged with each other. That is, the two first connection blocks 410 are connected to each other along the first combined direction R1, and the two second connection blocks 510 are connected to each other along the second combined direction R2, which can further strengthen the structural stability of the linear actuation structure 10 Sex.
  • the driving unit 900 drives the pipe 620 to rotate, the first nut 630 drives the center pillar 200, the middle pipe 610, and the second nut 640 to be displaced in the axial direction I1, and drives the first fitting shaft sleeve with the pipe 620 661, the transmission shaft 662 and the second fitting shaft sleeve 663 are rotated by the interlocking screw 664, so that the screw 664 moves the upper column 300 along the axial direction I1 relative to the second nut 640 to complete the lifting of the center column 200 and the upper column 300 Adjustment.
  • FIG. 6 is a schematic perspective view of a linear actuation structure 20 according to an embodiment of the present invention
  • FIG. 7 illustrates another part of the linear actuation structure 20 of FIG. 6 exploding 8 is a schematic partial cross-sectional view of the linear actuation structure 20 of FIG. 6.
  • the linear actuating structure 20 includes a lower pillar 100a, a middle pillar 200a, an upper pillar 300a, a driving unit 900a, a linear mechanism 600a, a first reinforcing sleeve 400a, and a second reinforcing sleeve 500a.
  • the structure of the linear actuating structure 20 is similar to the linear actuating structure 10, only the differences are listed below, and the same or similar details are not described again.
  • the linear actuation structure 20 also includes a transmission nut 650a, which is connected to the other end of the pipe tooth 620a and rotates in conjunction with the pipe tooth 620a.
  • the transmission group 660a is sleeved by the transmission nut 650a, and the transmission group 660a is driven to rotate by the transmission nut 650a. .
  • the transmission group 660a may further include a transmission sleeve 661a, a screw 663a, and a sliding sleeve 662a.
  • the transmission sleeve 661a is engaged with the transmission nut 650a to be linked by the transmission nut 650a, and the transmission shaft sleeve 661a includes an inner Hole 6611a.
  • the screw 663a is telescopically located in the inner hole 6611a, the screw 663a is screwed by the second nut 640a, and one end of the screw 663a is connected to the upper post 300a.
  • the sliding sleeve 662a is sleeved and engaged with the other end of the screw 663a, and the outer wall of the sliding sleeve 662a cooperates with the inner hole 6611a of the transmission shaft sleeve 661a.
  • the transmission shaft sleeve 661a when the transmission shaft sleeve 661a is rotated in conjunction with the transmission nut 650a, the transmission shaft sleeve 661a drives the sliding sleeve 662a and the interlocking screw 663a to be displaced in the axial direction I1.
  • the inner wall of the transmission nut 650a has a hexagonal cross-sectional shape
  • the transmission shaft sleeve 661a has a hollow hexagonal column structure, and can cooperate with the inner wall of the transmission nut 650a.
  • the cross-sectional shape of the inner hole 6611a of the transmission sleeve 661a is also hexagonal
  • the sliding sleeve 662a is also a hollow hexagonal column structure.
  • the outer wall of the transmission sleeve 661a and the transmission sleeve 661a cooperate with each other and can be displaced in the axial direction I1 in the transmission sleeve 661a.
  • the inner wall of the sliding sleeve 662a includes a plurality of engaging teeth (not labeled), and can be engaged with a plurality of engaging teeth (not labeled) on the other end of the screw 663a to connect the sliding sleeve 662a with the screw 663a.
  • the outer wall of the screw 663a has an external thread and can be screwed to the internal thread of the second nut 640a.
  • the second nut 640a is restricted by its connection relationship with the middle tube 610a and cannot follow the rotation, so the screw 663a can be displaced in the axial direction I1 relative to the second nut 640a. Therefore, the screw 663a can drive the upper pillar 300a to be displaced in the axial direction I1 relative to the lower pillar 100a.
  • the transmission group 660a may further include a screw stopper 664a, which is sleeved on the screw 663a and abuts one end of the second nut 640a, and the screw stopper 664a is disposed on the transmission shaft sleeve 661a.
  • the screw stopper 664a may include two latching protrusions 6641a detachably engaged with two limiting holes 6612a of the transmission shaft sleeve 661a.
  • the two locking projections 6641a of the screw stopper 664a are located on both sides of the screw stopper 664a, and the two limiting holes 6612a of the transmission shaft sleeve 661a are located at one end of the transmission shaft sleeve 661a.
  • the driving unit 900a drives the pipe tooth 620a to rotate, and the first nut 630a drives the center pillar 200a, the middle pipe 610a, and the second nut 640a to move in the axial direction I1, and the driving nut 650a that rotates together with the pipe tooth 620a drives
  • the transmission shaft sleeve 661a rotates in conjunction with the sliding sleeve 662a and the screw 663a, so that the screw 663a relative to the second nut 640a drives the upper pillar 300a to be displaced in the axial direction I1, thereby completing the lifting adjustment of the middle pillar 200a and the upper pillar 300a.
  • the inner diameter of the lower pillar, the middle pillar, and the upper pillar may also be sequentially increased. Therefore, the middle pillar is retractably located outside the lower pillar, and the upper pillar is retractably located outside the middle pillar.
  • a reinforcing sleeve is connected between the center pillar and the second nut, so that the center pillar is linked by the second nut.
  • the first sliding piece is located between the upper pillar and the middle pillar, and the first sliding piece includes a first locking pin passing through the first hole of the middle pillar to fit the first locking hole of the first reinforcing sleeve group.
  • connection manner between the second nut and the first reinforcement sleeve may be the same as the connection manner between the first nuts 630, 630a and the first reinforcement sleeve 400, 400a in the embodiment of FIG. 1 and FIG. 6 described above.
  • the structural configuration of the first nut and the second nut can be made the same, and the first reinforcing sleeve can be fitted and connected with the first nut.

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  • General Engineering & Computer Science (AREA)
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Abstract

一种线性致动结构，其包含下柱（100）、中柱（200）、上柱（300）、驱动单元（900）、线性机构（600）及第一补强套组（400）。线性机构（600）位于下柱（100）内且受驱动单元（900）驱动，线性机构（600）包含管牙（620）、第一螺母（630）、中管（610）、第二螺母（640）及传动组（660）。管牙（620）受驱动单元（900）驱动旋转；第一螺母（630）套设于管牙（620），管牙（620）旋转而使第一螺母（630）沿轴向位移；中管（610）第一端连接第一螺母（630）；第二螺母（640）连接中管（610）的第二端以与第一螺母（630）同步位移；传动组（660）位于管牙（620）内，传动组（660）连接上柱（300）且受管牙（620）驱动旋转，以相对第二螺母（640）带动上柱（300）沿轴向位移。第一补强套组（400）连接于中柱与第一螺母（630）之间，以使中柱（200）受第一螺母（630）连动。由此增加线性致动结构稳固性。

Description

线性致动结构 技术领域
本发明涉及一种线性致动结构，尤其涉及一种具有下柱、中柱及上柱的三段式线性致动结构。
背景技术
线性致动器广泛地应用于生活中，例如升降桌及升降椅等，通过线性致动器可以调整升降桌及升降椅的高度，以符合使用者需求。
公知的线性致动器结构包含一下柱、一中柱、一上柱以及一线性机构，通过线性机构的作动可带动中柱及上柱位移而达到伸缩的效果。然而，下柱、中柱及上柱皆为中空的柱体且彼此不相连接，其在伸长时仅靠内部的线性机构支撑，而使得线性致动器结构容易受外力影响产生摇晃不稳的现象。
有鉴于此，如何有效地改善线性致动器结构的结构配置，增加其伸长时的稳固性，遂成相关业者努力的目标。
发明内容
本发明提供一种线性致动结构，通过第一补强套组的配置，可以有效的增加线性致动结构的稳固性。
依据本发明的一实施方式提供一种线性致动结构，其包含一下柱、一中柱、一上柱、一驱动单元、一线性机构及一第一补强套组。下柱具有一轴向，中柱可伸缩地位于下柱内，上柱可伸缩地位于中柱内，驱动单元位于下柱的一端。线性机构位于下柱内且受驱动单元驱动，线性机构包含一管牙、一第一螺母、一中管、一第二螺母及一传动组。管牙一端连接驱动单元且受驱动单元驱动旋转；第一螺母套设于管牙，管牙旋转而使第一螺母沿轴向位移；中管具有一第一端及一第二端，第一端连接第一螺母；第二螺母连接中管的第二端，以与第一螺母同步沿轴向位移；传动组可伸缩地位于管牙内，传动组连接上柱且受管牙驱动旋转，以相对第二螺母带动上柱沿轴向位移。第一补强套组连接于中柱与第一螺母之间，以使中柱受第一螺母连动。
由此，通过驱动单元驱动线性机构作动，可使中柱及上柱沿轴向伸缩，且通过第一补强套组连接于中柱与线性机构之间的结构配置，可使线性致动结构的结构更稳固。
依据前述的线性致动结构，还可包含一第二补强套组位于上柱及中管之间，且第二补强套组连接上柱。或前述线性致动结构可还包含一第一滑动片及一第二滑动片，第一滑动片位于下柱与中柱之间，第一滑动片包含一第一卡销穿过中柱的一第一孔洞以嵌合第一补强套组的一第一卡孔；第二滑动片位于中柱与上柱之间，第二滑动片包含一第二卡销穿过上柱的一第二孔洞以嵌合第二补强套组的一第二卡孔。
依据前述的线性致动结构，其中第一补强套组可包含两个第一连接块互相卡合，且第二补强套组可包含两个第二连接块互相卡合。或两个第一连接块互相卡合的一第一组合方向可与两个第二连接块互相卡合的一第二组合方向垂直。
依据前述的线性致动结构，其中传动组可包含一第一嵌合轴套、一螺杆、一第二嵌合轴套以及一传动轴，第一嵌合轴套位于管牙内且与管牙嵌合；螺杆被第二螺母套设螺接，且螺杆的一端连接上柱；第二嵌合轴套位于螺杆内且与螺杆嵌合；传动轴一端连接第一嵌合轴套且一另一端连接第二嵌合轴套；其中，当管牙转动时，管牙连动第一嵌合轴套转动，以使传动轴连动第二嵌合轴套及螺杆转动，而使螺杆带动上柱沿轴向位移。
依据前述的线性致动结构，其中，第一嵌合轴套可包含一第一凸肋，其沿第一嵌合轴套的一径向朝外凸出，且管牙包含一第一内壁嵌槽，其与第一凸肋对应嵌合。或第一嵌合轴套可还包含多个第一嵌合齿，其沿第一嵌合轴套的径向朝内凸出，且传动轴包含多个第一咬合齿，位于传动轴的一端且分别与第一嵌合齿啮合。
依据前述的线性致动结构，其中，第二嵌合轴套可包含一第二凸肋，其沿第二嵌合轴套的一径向朝外凸出；且螺杆包含一第二内壁嵌槽，与第二凸肋对应嵌合。或第二嵌合轴套可还包含多个第二嵌合齿，其沿第二嵌合轴套的径向朝内凸出，且传动轴包含多个第二咬合齿，位于传动轴的另一端且分别与第二嵌合齿啮合。
依据前述的线性致动结构，还包含一传动螺母，其连接管牙的另一端且受管牙连动旋转，其中，传动组被传动螺母套设，传动组受传动螺母驱动旋转。
依据前述的线性致动结构，其中传动组更可包含一传动轴套、一螺杆及一滑套，传动轴套啮合于传动螺母以受传动螺母连动，且传动轴套包含一内孔，螺杆可伸缩地位于内孔，螺杆被第二螺母套设螺接，且螺杆的一端连接上柱，滑套套设啮合于螺杆的另一端，且滑套的外壁与传动轴套的内孔配合，其中，当传动轴套受传动螺母连动旋转，传动轴套带动 滑套连动螺杆沿轴向位移。或传动组更可包含一螺杆档片，其套设于螺杆且抵接于第二螺母的一端，螺杆档片设置于传动轴套。或螺杆档片可包含两个卡凸可拆地卡合于传动轴套的两个限位孔。
依据本发明的另一实施方式提供一种线性致动结构，其包含一下柱、一中柱、一上柱、一驱动单元、一线性机构及一第一补强套组。下柱具有一轴向，中柱可伸缩地位于下柱外，上柱可伸缩地位于中柱外，驱动单元位于下柱的一端。线性机构位于下柱内且受驱动单元驱动，线性机构包含一管牙、一第一螺母、一中管、一第二螺母及一传动组。管牙一端连接驱动单元且受驱动单元驱动旋转；第一螺母套设于管牙，管牙旋转而使第一螺母沿轴向位移；中管具有一第一端及一第二端，第一端连接第一螺母；第二螺母连接中管的第二端，以与第一螺母同步沿轴向位移；传动组可伸缩地位于管牙内，传动组连接上柱且受管牙驱动旋转，以相对第二螺母带动上柱沿轴向位移。第一补强套组连接于中柱与第二螺母之间，以使中柱受第二螺母连动。
依据前述的线性致动结构，还可包含一第一滑动片位于上柱与中柱之间，第一滑动片包含一第一卡销穿过中柱的一第一孔洞以嵌合第一补强套组的一第一卡孔。
本发明的有益效果在于，通过驱动单元驱动线性机构作动，可使中柱及上柱沿轴向伸缩，且通过第一补强套组连接于中柱与线性机构之间的结构配置，可使线性致动结构的结构更稳固。
附图说明
图1示出依照本发明一实施例的一种线性致动结构的立体示意图；
图2示出图1的线性致动结构的一部分爆炸示意图；
图3示出图1的线性致动结构的另一部分爆炸示意图；
图4示出图1的线性致动结构的一局部剖面示意图；
图5示出图1的线性致动结构的另一局部剖面示意图；
图6示出依照本发明另一实施例的一种线性致动结构的立体示意图；
图7示出图6的线性致动结构的一部分爆炸示意图；以及
图8示出图6的线性致动结构的一局部剖面示意图。
附图标记如下：
10、20 线性致动结构
100、100a 下柱
200、200a 中柱
300、300a 上柱
400、400a 第一补强套组
410 第一连接块
411 第一卡孔
412 卡槽
413 卡榫
414 盲孔
500、500a 第二补强套组
510 第二连接块
511 第二卡孔
600、600a 线性机构
610、610a 中管
620、620a 管牙
621 第一内壁嵌槽
630、630a 第一螺母
631 径向凸肋
640、640a 第二螺母
650 管牙螺母
650a 传动螺母
660、660a 传动组
661 第一嵌合轴套
661a 传动轴套
6611 第一凸肋
6611a 内孔
6612 第一嵌合齿
6612a 限位孔
662 传动轴
662a 滑套
6621 第一咬合齿
6622 第二咬合齿
663 第二嵌合轴套
6631 第二凸肋
6632 第二嵌合齿
664、663a 螺杆
664a 螺杆档片
6641a 卡凸
6641 第二内壁嵌槽
700 第二滑动片
710 第二卡销
800 第一滑动片
810 第一卡销
900、900a 驱动单元
910 马达
920 蜗轮
I1 轴向
R1 第一组合方向
R2 第二组合方向
具体实施方式
以下将参照附图说明本发明的实施例。为明确说明起见，许多实务上的细节将在以下叙述中一并说明。然而，阅读者应了解到，这些实务上的细节不应用以限制本发明。也就是说，在本发明部分实施例中，这些实务上的细节是非必要的。而为简化附图起见，一些公知惯用的结构与元件在附图中将以简单示意的方式示出；并且重复的元件将可能使用相同或类似的编号表示。
此外，本文中当某一元件(或机构或模块等)“连接”、“设置”或“耦合”于另一元件，可指所述元件是直接连接、直接设置或直接耦合于另一元件，亦可指某一元件是间接 连接、间接设置或间接耦合于另一元件，意即，有其他元件介于所述元件及另一元件之间。而当有明示某一元件是“直接连接”、“直接设置”或“直接耦合”于另一元件时，才表示没有其他元件介于所述元件及另一元件之间。而第一、第二、第三等用语只是用来描述不同元件或成分，而对元件/成分本身并无限制，因此，第一元件/成分亦可改称为第二元件/成分。且本文中的元件/成分/机构/模块的组合非此领域中的一般周知、常规或公知的组合，不能以元件/成分/机构/模块本身是否为公知，来判定其组合关系是否容易被本领域技术人员轻易完成。
请参阅图1、图2、图3、图4及图5，其中图1示出依照本发明一实施例的一种线性致动结构10的立体示意图，图2示出图1的线性致动结构10的一部分爆炸示意图，图3示出图1的线性致动结构10的另一部分爆炸示意图，图4示出图1的线性致动结构10的一局部剖面示意图，图5示出图1的线性致动结构10的另一局部剖面示意图。线性致动结构10其包含一下柱100、一中柱200、一上柱300、一驱动单元900、一线性机构600及一第一补强套组400。
下柱100具有一轴向I1，中柱200可伸缩地位于下柱100内，上柱300可伸缩地位于中柱200内，驱动单元900位于下柱100的一端。线性机构600位于下柱100内且受驱动单元900驱动，线性机构600包含一管牙620、一第一螺母630、一中管610、一第二螺母640及一传动组660。管牙620一端连接驱动单元900且受驱动单元900驱动旋转。第一螺母630套设于管牙620，管牙620旋转而使第一螺母630沿轴向I1位移。中管610具有一第一端(未标示)及一第二端(未标示)，第一端连接第一螺母630。第二螺母640连接中管610的第二端，以与第一螺母630同步沿轴向I1位移。
传动组660可伸缩地位于管牙620内，传动组660连接上柱300且受管牙620驱动旋转，以相对第二螺母640带动上柱300沿轴向I1位移。第一补强套组400连接于中柱200与第一螺母630之间，以使中柱200受第一螺母630连动。
由此，通过驱动单元900驱动线性机构600的作动可使中柱200及上柱300沿轴向I1伸缩，且通过第一补强套组400连接于中柱200与线性机构600之间的结构关系，可使线性致动结构10的结构更稳固。后面将详述线性致动结构10的细节及作动方式。
下柱100、中柱200及上柱300的内径依序递减，而使得中柱200可位于下柱100内部伸缩作动，上柱300可位于中柱200内部伸缩作动。
驱动单元900可包含一马达910、一蜗轮920及一联轴器组(未示出)，联轴器组连接 于蜗轮920及管牙620之间，马达910的轴心呈一蜗杆结构而能啮合于蜗轮920，因此马达910转动可以带动蜗轮920转动，进而带动管牙620转动。
管牙620的外壁具有外螺纹而可以与第一螺母630的内螺纹螺接。当管牙620旋转时，第一螺母630受限于其与中柱200的连接关系而无法跟随旋转，故第一螺母630仅能沿轴向I1位移。因此，第一螺母630可带动中柱200与中管610及第二螺母640相对下柱100沿轴向I1位移。线性机构600可还包含一管牙螺母650位于管牙620的另一端。
另外，当管牙620旋转时，会带动传动组660转动，进而带动上柱300相对中柱200移动。详细地说，传动组660可包含一第一嵌合轴套661、一螺杆664、一第二嵌合轴套663以及一传动轴662，第一嵌合轴套661位于管牙620内且与管牙620嵌合；螺杆664被第二螺母640套设螺接，且螺杆664的一端连接上柱300；第二嵌合轴套663位于螺杆664内且与螺杆664嵌合；传动轴662一端连接第一嵌合轴套661且一另一端连接第二嵌合轴套663。其中，当管牙620转动时，管牙620连动第一嵌合轴套661转动，以使传动轴662连动第二嵌合轴套663及螺杆664转动，而使螺杆664带动上柱300沿轴向I1位移。
其中，第一嵌合轴套661可包含四个第一凸肋6611，其沿第一嵌合轴套661的一径向(未示出)朝外凸出，且管牙620包含四个第一内壁嵌槽621，四个第一内壁嵌槽621分别与四个第一凸肋6611对应嵌合。第一嵌合轴套661可还包含多个第一嵌合齿6612，其沿第一嵌合轴套661的径向朝内凸出，且传动轴662包含多个第一咬合齿6621，其位于传动轴662的一端且分别与第一嵌合齿6612啮合。
第二嵌合轴套663可包含多个第二凸肋6631，其沿第二嵌合轴套663的一径向(未示出)朝外凸出；且螺杆664包含多个第二内壁嵌槽6641，其分别与各第二凸肋6631对应嵌合。第二嵌合轴套663可还包含多个第二嵌合齿6632，其沿第二嵌合轴套663的径向朝内凸出，且传动轴662包含多个第二咬合齿6622，其位于传动轴662的另一端且分别与第二嵌合齿6632啮合。
通过第一凸肋6611与第一内壁嵌槽621的结构配置，可以使第一嵌合轴套661嵌合于管牙620内，而使得管牙620旋转时带动第一嵌合轴套661连动。而由于第一嵌合齿6612啮合于第一咬合齿6621，可使第一嵌合轴套661转动时连动传动轴662旋转。另外，因为第二嵌合齿6632啮合于第二咬合齿6622，故第二嵌合轴套663与传动轴662连接，且由于第二凸肋6631与第二内壁嵌槽6641嵌合而使得第二嵌合轴套663嵌合于螺杆664， 可导致传动轴662连动第二嵌合轴套663及螺杆664旋转的作动关系。在其他实施例中，第一凸肋、第一内壁嵌槽、第二凸肋及第二内壁嵌槽的数量至少为一，不限于此。
另外，螺杆664的外壁具有外螺纹而可以与第二螺母640的内螺纹螺接。当螺杆664受传动轴662连动旋转时，第二螺母640受限于其与中管610的连接关系而无法跟随旋转，故螺杆664可相对于第二螺母640沿轴向I1位移。因此，螺杆664可带动上柱300相对中柱200及下柱100沿轴向I1位移。
进一步地，线性致动结构10可还包含一第二补强套组500位于上柱300及中管610之间，且第二补强套组500连接上柱300。线性致动结构10还可包含四个第一滑动片800及四个第二滑动片700，各第一滑动片800位于下柱100与中柱200之间，各第一滑动片800包含两个第一卡销810穿过中柱200的两个第一孔洞(未示出)以嵌合第一补强套组400的两个第一卡孔411。各第二滑动片700位于中柱200与上柱300之间，各第二滑动片700包含两个第二卡销710穿过上柱300的两个第二孔洞(未示出)以嵌合第二补强套组500的两个第二卡孔511。
更仔细的说，第一补强套组400可包含两个第一连接块410互相卡合，且第二补强套组500可包含两个第二连接块510互相卡合。两个第一连接块410的形状相同，且各第一连接块410包含一半管内壁(未标示)、两个端面(未标示)、两个卡槽412、两个卡榫413及两个盲孔414，卡槽412位于半管内壁上且供第一螺母630的径向凸肋631卡合，两个卡榫413位于其中一端面上，两个盲孔414位于另一端面上。因此，在组合时，可让第一个第一连接块410的两个卡槽412对准第一螺母630的两个径向凸肋631，并让第两个第一连接块410的两个卡槽412对准第一螺母630的另两个径向凸肋631，并让第一个第一连接块410的两个卡榫413卡合于第二个第一连接块410的两个盲孔414，并让第二个第一连接块410的两个卡榫413卡合于第一个第一连接块410的两个盲孔414，以完成第一补强套组400的连接。
各第一连接块410可还包含一侧面(未标示)、两个连接面(未标示)及四个第一卡孔411，两个连接面分别连接于侧面及端面之间，两个个第一卡孔411分别位于两个连接面上，另外两个第一卡孔411皆位于侧面上。由此，当两个第一连接块410相互组合后，第一个第一连接块410连接面上的第一卡孔411及第二个第一连接块410连接面上的第一卡孔411可供同一个第一滑动片800的两个第一卡销810分别卡合。第二连接块510的结构与第一连接块410的差别仅在于，第二连接块510不包含卡槽。
在此要特别说明的是，在其他实施例中，第一滑动片、第二滑动片、第一卡销、第二卡销、第一卡孔、第二卡孔、第一孔洞及第二孔洞的数量至少为一，且第一个第一连接块及第二个第一连接块之间、第一个第二连接块及第二个第二连接块之间、或第一补强套组与第一螺母之间的连接方式可以是锁接或其他可拆地连接方式，不以上述公开为限。
在图3的实施例中，两个第一连接块410互相卡合的一第一组合方向R1可与两个第二连接块510互相卡合的一第二组合方向R2垂直。也就是说，两个第一连接块410是沿第一组合方向R1相互连接，两个第二连接块510是沿第二组合方向R2相互连接，而能更强化线性致动结构10的结构稳定性。
在作动时，由驱动单元900驱动管牙620转动，第一螺母630带动中柱200、中管610及第二螺母640沿轴向I1位移，且与管牙620带动第一嵌合轴套661、传动轴662及第二嵌合轴套663，以连动螺杆664转动，使螺杆664相对第二螺母640带动上柱300沿轴向I1位移，以完成中柱200及上柱300的升降调整。
请参阅图6、图7及图8，其中图6示出依照本发明一实施例的一种线性致动结构20的立体示意图，图7示出图6的线性致动结构20的另一部分爆炸示意图，图8示出图6的线性致动结构20的一局部剖面示意图。线性致动结构20包含一下柱100a、一中柱200a、一上柱300a、一驱动单元900a、一线性机构600a、一第一补强套组400a及一第二补强套组500a。线性致动结构20的结构与线性致动结构10类似，以下仅列出不同处，而相同或类似处不再赘述。
线性致动结构20还包含一传动螺母650a，其连接管牙620a的另一端且受管牙620a连动旋转，其中，传动组660a被传动螺母650a套设，传动组660a受传动螺母650a驱动旋转。
当管牙620a旋转时，会带动连接于管牙620a另一端的传动螺母650a转动，而带动传动组660a转动，进而带动上柱300a相对中柱200a移动。详细地说，传动组660a更可包含一传动轴套661a、一螺杆663a及一滑套662a，传动轴套661a啮合于传动螺母650a以受传动螺母650a连动，且传动轴套661a包含一内孔6611a。螺杆663a可伸缩地位于内孔6611a，螺杆663a被第二螺母640a套设螺接，且螺杆663a的一端连接上柱300a。滑套662a套设啮合于螺杆663a的另一端，且滑套662a的外壁与传动轴套661a的内孔6611a配合。其中，当传动轴套661a受传动螺母650a连动旋转时，传动轴套661a带动滑套662a连动螺杆663a沿轴向I1位移。
如图7所示，传动螺母650a的内壁具有一呈六角形的截面形状，传动轴套661a呈空心六角柱结构，而能与传动螺母650a的内壁相互配合。此外，传动轴套661a内孔6611a的截面形状亦为六角形，滑套662a亦为空心六角柱结构，其外壁与传动轴套661a相互配合而能于传动轴套661a内沿轴向I1位移。滑套662a的内壁包含多个咬合齿(未标示)，而可以囓合于螺杆663a另一端上的多个啮合齿(未标示)，以使滑套662a与螺杆663a连接。
螺杆663a的外壁具有外螺纹而可以与第二螺母640a的内螺纹螺接。当螺杆663a受传动轴套661a连动旋转时，第二螺母640a受限于其与中管610a的连接关系而无法跟随旋转，故螺杆663a可相对于第二螺母640a沿轴向I1位移。因此，螺杆663a可带动上柱300a相对下柱100a沿轴向I1位移。
进一步地，传动组660a更可包含一螺杆档片664a，其套设于螺杆663a且抵接于第二螺母640a的一端，螺杆档片664a设置于传动轴套661a。螺杆档片664a可包含两个卡凸6641a可拆地卡合于传动轴套661a的两个限位孔6612a。
更详细地说，螺杆档片664a的两个卡凸6641a位于螺杆档片664a的两侧，传动轴套661a的两个限位孔6612a位于传动轴套661a的一端，两个卡凸6641a可相对于螺杆档片664a的一径向变形。当螺杆档片664a设置于传动轴套661a内时，两个卡凸6641a可分别卡合于两个限位孔6612a，且螺杆档片664a的一抵接部(未示出)外露于传动轴套661a以抵接于第二螺母640a的一端。
在作动时，由驱动单元900a驱动管牙620a转动，第一螺母630a带动中柱200a、中管610a及第二螺母640a沿轴向I1位移，且与管牙620a一同转动的传动螺母650a带动传动轴套661a，以连动滑套662a及螺杆663a转动，使螺杆663a相对第二螺母640a带动上柱300a沿轴向I1位移，进而完成中柱200a及上柱300a的升降调整。
在另一实施例中，亦可以是下柱、中柱及上柱的内径依序递增，故中柱是可伸缩地位于下柱外，上柱是可伸缩地位于中柱外，且将第一补强套组改连接于中柱与第二螺母之间，以使中柱受第二螺母连动。而第一滑动片位于上柱与中柱之间，且第一滑动片包含第一卡销穿过中柱的第一孔洞以嵌合第一补强套组的第一卡孔。
其中，第二螺母与第一补强套组的连接方式可与上述的图1、图6实施例中的第一螺母630、630a与第一补强套组400、400a的连接方式相同，不在赘述。在此情况下，可让第一螺母与第二螺母的结构配置相同，而能让第一补强套组改与第一螺母嵌合连接。
虽然本发明已以实施方式公开如上，然其并非用以限定本发明，本领域技术人员在不 脱离本发明的精神和范围内，当可作各种的更动与润饰，因此本发明的保护范围当视随附的权利要求所界定为准。

Claims (16)

  1. 一种线性致动结构，其特征在于包含：
    一下柱，具有一轴向；
    一中柱，可伸缩地位于该下柱内；
    一上柱，可伸缩地位于该中柱内；
    一驱动单元，位于该下柱的一端；
    一线性机构，位于该下柱内且受该驱动单元驱动，该线性机构包含：
    一管牙，其一端连接该驱动单元且受该驱动单元驱动旋转；
    一第一螺母，套设于该管牙，该管牙旋转而使该第一螺母沿该轴向位移；
    一中管，具有一第一端及一第二端，该第一端连接该第一螺母；
    一第二螺母，连接该中管的该第二端，以与该第一螺母同步沿该轴向位移；及
    一传动组，可伸缩地位于该管牙内，该传动组连接该上柱且受该管牙驱动旋转，以相对该第二螺母带动该上柱沿该轴向位移；以及
    一第一补强套组，连接于该中柱与该第一螺母之间，以使该中柱受该第一螺母连动。
  2. 如权利要求1所述的线性致动结构，其特征在于，还包含：
    一第二补强套组，位于该上柱及该中管之间，且该第二补强套组连接该上柱。
  3. 如权利要求2所述的线性致动结构，其特征在于，还包含：
    一第一滑动片，位于该下柱与该中柱之间，该第一滑动片包含一第一卡销穿过该中柱的一第一孔洞以嵌合该第一补强套组的一第一卡孔；以及
    一第二滑动片，位于该中柱与该上柱之间，该第二滑动片包含一第二卡销穿过该上柱的一第二孔洞以嵌合该第二补强套组的一第二卡孔。
  4. 如权利要求2所述的线性致动结构，其特征在于，该第一补强套组包含两个第一连接块互相卡合，且该第二补强套组包含两个第二连接块互相卡合。
  5. 如权利要求4所述的线性致动结构，其特征在于，两个该第一连接块互相卡合的一第一组合方向与两个该第二连接块互相卡合的一第二组合方向垂直。
  6. 如权利要求1所述的线性致动结构，其特征在于，该传动组包含：
    一第一嵌合轴套，位于该管牙内且与该管牙嵌合；
    一螺杆，被该第二螺母套设螺接，且该螺杆的一端连接该上柱；
    一第二嵌合轴套，位于该螺杆内且与该螺杆嵌合；以及
    一传动轴，一端连接该第一嵌合轴套且一另一端连接该第二嵌合轴套；
    其中，当该管牙转动时，该管牙连动该第一嵌合轴套转动，以使该传动轴连动该第二嵌合轴套及该螺杆转动，而使该螺杆带动该上柱沿该轴向位移。
  7. 如权利要求6所述的线性致动结构，其特征在于，
    该第一嵌合轴套包含：
    一第一凸肋，其沿该第一嵌合轴套的一径向朝外凸出；且
    该管牙包含：
    一第一内壁嵌槽，与该第一凸肋对应嵌合。
  8. 如权利要求7所述的线性致动结构，其特征在于，
    该第一嵌合轴套还包含：
    多个第一嵌合齿，其沿该第一嵌合轴套的该径向朝内凸出；且
    该传动轴包含：
    多个第一咬合齿，位于该传动轴的该端且分别与多个所述第一嵌合齿啮合。
  9. 如权利要求6所述的线性致动结构，其特征在于，
    该第二嵌合轴套包含：
    一第二凸肋，其沿该第二嵌合轴套的一径向朝外凸出；且
    该螺杆包含：
    一第二内壁嵌槽，与该第二凸肋对应嵌合。
  10. 如权利要求9所述的线性致动结构，其特征在于，
    该第二嵌合轴套还包含：
    多个第二嵌合齿，其沿该第二嵌合轴套的该径向朝内凸出；且
    该传动轴包含：
    多个第二咬合齿，位于该传动轴的该另一端且分别与多个所述第二嵌合齿啮合。
  11. 如权利要求1所述的线性致动结构，其特征在于，还包含：
    一传动螺母，连接该管牙的另一端且受该管牙连动旋转；
    其中，该传动组被该传动螺母套设，该传动组受该传动螺母驱动旋转。
  12. 如权利要求11所述的线性致动结构，其特征在于，该传动组还包含：
    一传动轴套，啮合于该传动螺母以受该传动螺母连动，且该传动轴套包含一内孔；
    一螺杆，可伸缩地位于该内孔，该螺杆被该第二螺母套设螺接，且该螺杆的一端连接 该上柱；以及
    一滑套，套设啮合于该螺杆的另一端，且该滑套的外壁与该传动轴套的该内孔配合；
    其中，当该传动轴套受该传动螺母连动旋转，该传动轴套带动该滑套连动该螺杆沿该轴向位移。
  13. 如权利要求12所述的线性致动结构，其特征在于，该传动组还包含：
    一螺杆档片，套设于该螺杆且抵接于该第二螺母的一端，该螺杆档片设置于该传动轴套。
  14. 如权利要求13所述的线性致动结构，其特征在于，该螺杆档片包含两个卡凸可拆地卡合于该传动轴套的两个限位孔。
  15. 一种线性致动结构，其特征在于包含：
    一下柱，具有一轴向；
    一中柱，可伸缩地位于该下柱外；
    一上柱，可伸缩地位于该中柱外；
    一驱动单元，位于该下柱的一端；
    一线性机构，位于该下柱内且受该驱动单元驱动，该线性机构包含：
    一管牙，其一端连接该驱动单元且受该驱动单元驱动旋转；
    一第一螺母，套设于该管牙，该管牙旋转而使该第一螺母沿该轴向位移；
    一中管，具有一第一端及一第二端，该第一端连接该第一螺母；
    一第二螺母，连接该中管的该第二端，以与该第一螺母同步沿该轴向位移；及
    一传动组，可伸缩地位于该管牙内，该传动组连接该上柱且受该管牙驱动旋转，
    以相对该第二螺母带动该上柱沿该轴向位移；以及
    一第一补强套组，连接于该中柱与该第二螺母之间，以使该中柱受该第二螺母连动。
  16. 如权利要求15所述的线性致动结构，其特征在于，还包含：
    一第一滑动片，位于该上柱与该中柱之间，该第一滑动片包含一第一卡销穿过该中柱的一第一孔洞以嵌合该第一补强套组的一第一卡孔。
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