WO2020073820A1 - 一种用于升降立柱的传动总成及升降立柱 - Google Patents

一种用于升降立柱的传动总成及升降立柱 Download PDF

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Publication number
WO2020073820A1
WO2020073820A1 PCT/CN2019/108362 CN2019108362W WO2020073820A1 WO 2020073820 A1 WO2020073820 A1 WO 2020073820A1 CN 2019108362 W CN2019108362 W CN 2019108362W WO 2020073820 A1 WO2020073820 A1 WO 2020073820A1
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WIPO (PCT)
Prior art keywords
transmission
hollow shaft
sleeve
transmission assembly
nut
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PCT/CN2019/108362
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English (en)
French (fr)
Inventor
陆小健
李威强
李兵
Original Assignee
浙江捷昌线性驱动科技股份有限公司
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Application filed by 浙江捷昌线性驱动科技股份有限公司 filed Critical 浙江捷昌线性驱动科技股份有限公司
Priority to US17/628,570 priority Critical patent/US20220259019A1/en
Priority to EP19871067.5A priority patent/EP3889097A4/en
Publication of WO2020073820A1 publication Critical patent/WO2020073820A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/16—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through bevel-wheel gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/20—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through multiple or change-speed gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions

Definitions

  • the invention relates to the technical field of lifting columns, in particular to a transmission assembly for lifting columns and lifting columns.
  • the lifting columns of lifting mechanisms such as lifting tables and lifting chairs on the market often set the driving device at the upper end of the transmission assembly and directly fix the driving device on the bottom surface of the lifting plane to realize the connection between the lifting column and the lifting plane.
  • the vibration of the motor is easy to produce during use, and the vibration of the motor is easily transmitted to the lifting plane, so that the lifting plane generates large vibration during the lifting process, which affects the user's experience.
  • the object of the present invention is to provide a transmission assembly and a lifting column which are used for lifting columns with stable transmission.
  • a transmission assembly for an elevating upright column includes an inner tube
  • the transmission assembly includes a hollow shaft provided with an external thread
  • a transmission screw located in the hollow shaft 3.
  • a sleeve sleeved outside the hollow shaft, a guide tube limited to the sleeve and a driving device for driving the guide tube to rotate, the guide tube and the hollow shaft can rotate synchronously and the guide tube and the hollow shaft can be along the shaft
  • the telescopic screw can rotate synchronously with the hollow shaft and the telescopic screw and the hollow shaft can be relatively telescopic along the axial direction.
  • the driving device is located in the inner tube and fixedly installed on the upper end of the sleeve.
  • the lower end of the sleeve is fixedly connected with
  • the first transmission nut is threaded with the hollow shaft, the first transmission nut is fixedly connected with the inner tube, and the upper end of the sleeve is freely set.
  • a top plate is provided at the upper end of the inner tube, and there is a gap between the driving device and the top plate; or, a flexible top plate is provided at the upper end of the inner tube, and there is no gap between the driving device and the flexible top plate.
  • the transmission assembly further includes a positioning block, a positioning groove is provided on the side wall of the first transmission nut, and a positioning hole is provided on the lower end of the inner tube, the positioning block passes through the positioning hole and the positioning groove in order to enable the first transmission
  • the nut and inner tube are fixed in position in the axial direction.
  • the driving device includes a motor, a gear box box and a speed reduction mechanism located in the gear box box.
  • the speed reduction mechanism includes a sun gear connected to the output shaft of the motor, a helical gear planetary carrier matched with the sun gear, and a slant gear The spur gear carrier matched with the output end of the gear planet carrier.
  • the upper end of the sleeve is connected to the driving device by screws; or, the upper end of the sleeve is connected to the driving device by snaps.
  • the lower end of the sleeve is connected to the first drive nut by screws; or, the lower end of the sleeve is connected to the first drive nut by snaps.
  • the invention also discloses a lifting column, which comprises a transmission assembly and inner and outer tubes which are sequentially arranged from inside to outside, wherein the transmission assembly becomes the transmission assembly for lifting columns in any of the above technical solutions.
  • the lower end of the hollow shaft is provided with a second transmission nut that is threaded with the transmission screw, and an external locking structure that restricts the rotation of the second transmission nut is provided on the outside of the second transmission nut. Cooperation with external management activities.
  • the transmission assembly further includes a middle tube.
  • the middle tube is located between the inner tube and the outer tube.
  • the lower end of the hollow shaft is provided with a second transmission nut threadedly matched with the transmission screw.
  • the exterior of the second transmission nut is provided with The locking structure restricting the rotation of the second transmission nut is fixedly connected to the lower end of the middle tube.
  • the upper end of the sleeve is freely arranged means that the upper end of the sleeve is not fixed and floats in the inner tube.
  • the present invention has the following advantages:
  • the vibration caused by the driving device passes through the sleeve
  • the tube is transferred to the first drive nut and then to the lower end of the inner tube, but not directly to the lifting platform above the inner tube, so that the vibration of the lifting platform during lifting is less, and the transmission of the transmission assembly is more It is stable and improves the user's experience.
  • the upper part of the lower end of the inner tube is basically unstressed, which greatly reduces the stress on the inner tube and improves the service life of the inner tube.
  • the gap between the driving device and the top plate is set, so that the driving device is not easy to contact the top plate during use, and the vibration will not be transmitted to the lifting platform through the top plate, which further improves the shock absorption effect and makes the transmission of the transmission assembly more smooth.
  • the top plate is a flexible top plate, that is, the top plate is made of a flexible material. At this time, since the flexible top plate can buffer the vibration of the driving device, the driving device can be set with no gap between the flexible top plate.
  • the positioning block By setting the positioning block, the positioning block passes through the positioning hole and the positioning groove in order to fix the position of the first transmission nut and the inner tube in the axial direction, and the fixing is simple and convenient.
  • the power transmission of the driving device is more stable, the generation of noise is reduced, and the stability of the transmission assembly transmission is further improved.
  • the upper end of the casing is connected with the driving device by screws. Due to the self-locking nature of the thread, the connection between the driving device and the casing is more reliable. At the same time, the connection is relatively simple and reliable. Or, it is connected by a snap, making disassembly and assembly simple and convenient without the use of tools.
  • the lower end of the bushing is connected to the first drive nut by screws. Due to the self-locking nature of the thread, the connection between the drive device and the bushing is more reliable. At the same time, the connection is relatively simple and reliable. Or, it is connected by snaps, which makes disassembly and assembly simple and convenient without tools.
  • the present invention also discloses a lifting column.
  • the lifting column includes a transmission assembly and an inner tube and an outer tube which are sequentially arranged from inside to outside. Because the transmission assembly runs more smoothly and has less noise, the lifting column is relatively more stable during the lifting process. Stable, less vibration.
  • the locking structure and the outer tube can move freely in the axial direction, and the locking structure can move up and down in the outer tube with the second transmission nut.
  • the transmission assembly can be expanded and contracted in three sections, which can reduce the installation distance of the lifting column.
  • the second transmission nut moves in the axial direction At the same time, it can drive the middle tube to rise and fall relative to the outer tube, making the transmission more stable.
  • FIG. 1 is a schematic structural diagram of a transmission assembly according to Embodiment 1 of the present invention.
  • FIG. 2 is a cross-sectional view of the transmission assembly according to Embodiment 1 of the present invention.
  • FIG. 3 is an enlarged view of A in FIG. 2.
  • FIG. 4 is an enlarged view of B in FIG. 2.
  • FIG 5 is an exploded view of the transmission assembly according to Embodiment 1 of the present invention.
  • FIG. 6 is an exploded view of the driving device in the transmission assembly according to Embodiment 1 of the present invention.
  • FIG. 7 is a cross-sectional view of the lifting post according to Embodiment 1 of the present invention.
  • FIG. 8 is a partial cross-sectional view of a lifting post according to Embodiment 2 of the present invention.
  • FIG. 9 is a cross-sectional view of a lifting column according to Embodiment 3 of the present invention.
  • the present invention provides a transmission assembly for a lifting column.
  • the lifting column includes an inner tube 8.
  • the transmission assembly includes a hollow shaft 2 provided with an external thread, located in the hollow shaft 2
  • the drive screw 1, the sleeve 4 sleeved outside the hollow shaft 2, the guide tube 3 rotatably restricted in the sleeve 4 and the drive device 5 for driving the guide tube 3 to rotate, the guide tube 3 and
  • the hollow shaft 2 can rotate synchronously and the guide tube 3 and the hollow shaft 2 can expand and contract relative to each other in the axial direction
  • the transmission screw 1 can rotate synchronously with the hollow shaft 2 and the transmission screw 1 and the hollow shaft 2 can be opposed in the axial direction
  • Telescopic the driving device 5 is located in the inner tube 8 and fixedly installed on the upper end of the sleeve 4, the lower end of the sleeve 4 is fixedly connected with a first transmission nut 7, the first transmission nut 7 is threaded with the hollow shaft 2, the first transmission The nut 7 is fixed
  • the upper end of the inner tube 8 is provided with a top plate 81, and there is a gap between the driving device 5 and the inner tube 8 and the top plate 81, so that the driving device 5 is not easy to contact the inner tube 8 and the top plate 81 during use.
  • the vibration will not be transmitted to the lifting platform through the top plate 81 and the inner tube 8, further improving the vibration reduction effect of the transmission assembly.
  • the driving device 5 includes a motor 51, a gear box case 52, and a speed reduction mechanism located in the gear box case 52.
  • the speed reduction mechanism includes a sun gear 53 connected to the output shaft of the motor 51, and a helical gear carrier that is in transmission cooperation with the sun gear 53 54 and a spur gear carrier 55 cooperating with the output end of the helical gear carrier 54.
  • the gearbox case 52 includes a gearbox case 521 and a gearbox case cover 522.
  • the deceleration structure is located in the inner cavity formed by the gearbox case 521 and the gearbox case cover 522, and cooperates by providing a helical gear planet carrier 54 and a spur gear planet carrier 55 , Making the power transmission of the driving device 5 more stable, reducing the generation of noise, and further improving the shock absorption effect of the transmission assembly.
  • the output end of the spur gear carrier 55 is provided with a spline sleeve 551, and the guide tube 3 is provided with an internal spline.
  • the spline sleeve 551 cooperates with the internal spline so that the guide tube 3 and the spur gear carrier 55 can rotate synchronously.
  • the guide tube 3 and the hollow shaft 2 are drive-connected by a first transmission component 21, and the first transmission component 21 is fixedly installed at the upper end of the hollow shaft 2.
  • the cross-sectional shape of the first transmission component 21 is transverse to the guide tube 3
  • the cross-sectional shapes are matched so that the first transmission member 21 can only move axially relative to the guide tube 3 and cannot rotate in the circumferential direction.
  • the transmission screw 1 is connected to the hollow shaft 2 through a second transmission component 11.
  • the second transmission component 11 is fixedly installed on the upper end of the transmission screw 1.
  • the cross-sectional shape of the second transmission component 11 is the same as the cross-sectional shape of the hollow shaft 2. With the cooperation, the second transmission component 11 can only move axially relative to the hollow shaft 2 and cannot rotate in the circumferential direction.
  • the transmission assembly further includes a positioning block 82.
  • a positioning groove 71 is provided on the side wall of the first transmission nut 7 and a positioning hole is provided at the lower end of the inner tube 8.
  • the positioning block 82 passes through the positioning hole and the positioning groove 71 in order to make the first
  • the transmission nut 7 and the inner tube 8 are fixed in position in the axial direction, and the fixing is simple and convenient.
  • the upper end of the sleeve 4 and the gear box cover 522 of the drive device 5 are connected by screws. Due to the self-locking nature of the thread, the connection between the drive device 5 and the sleeve 4 is relatively reliable. At the same time, the connection is relatively simple and reliable.
  • the cross section of the sleeve 4 is square, and four screws are provided and are located at the four corners of the sleeve 4 respectively, so that the connection between the sleeve 4 and the driving device 5 is more stable and reliable.
  • the lower end of the sleeve 4 is connected to the first transmission nut 7 by screws, and the screw passes through the first transmission nut 7 and cooperates with the sleeve 4 to fix the sleeve 4 and the first transmission nut 7, because the thread is self-locking, so that the drive
  • the connection between the device 5 and the sleeve 4 is relatively reliable, and at the same time, the connection is relatively simple and reliable.
  • the present invention also discloses a lifting column, including a transmission assembly and an inner tube 8 and an outer tube 9 which are sequentially arranged from the inside to the outside.
  • the transmission assembly becomes any of the above technical solutions for the lifting column
  • the transmission assembly because the operation of the transmission assembly is relatively stable and the noise is low, the lifting column is relatively stable during the lifting process, and the vibration is small.
  • the lower end of the outer tube 9 is provided with a bottom plate 91, the lower end of the transmission screw 1 is fixed on the bottom plate 91, and the lifting upright post is fixed on the installation plane through the bottom plate 91.
  • the lower end of the hollow shaft 2 is provided with a second transmission nut 6 with a fixed circumferential position.
  • the second transmission nut 6 is threadedly engaged with the transmission screw 1, and the hollow shaft 2 is rotatable with the second transmission nut 6 in the axial direction
  • the outer part of the second transmission nut 6 is provided with a locking structure 61 that restricts the rotation of the second driving nut 6.
  • the locking structure 61 is located in the outer tube 9 and movably cooperates with the outer tube 9.
  • the locking structure 61 includes a first locking block 611 and a second locking block 612, the first locking block 611 and the second locking block 612 are engaged to form a receiving groove, and the second transmission nut 6 is located in the receiving In the slot, a limit hole is provided in the accommodating slot, and a limit protrusion is provided on the second transmission nut 6.
  • the limit slot cooperates with the limit protrusion to fix the circumferential relative position of the locking structure 61 and the second drive nut 6
  • the cross-sectional shape of the locking structure 61 matches the cross-sectional shape of the housing, so that the locking structure 61 can only move axially within the housing and cannot rotate in the circumferential direction.
  • the operation process of the lifting column in this embodiment the motor 51 in the driving device 5 drives the sun gear 53 to rotate, the sun gear 53 drives the helical gear planet carrier 54 to rotate, the helical gear planet carrier 54 drives the spur gear planet carrier 55 to rotate, and the spur gear
  • the planetary carrier 55 drives the spline sleeve 551 to rotate, the spline sleeve 551 drives the guide tube 3 to rotate, the guide tube 3 drives the hollow shaft 2 to rotate synchronously through the first transmission component 21, and the hollow shaft 2 drives the transmission screw through the second transmission component 11 1 rotation, because the transmission screw 1 and the bottom plate 91 are at the upper limit of the axial direction, the second transmission nut 6 is lifted along the axial direction of the transmission screw 1, and the hollow shaft 2 is raised and lowered with the second transmission nut 6 while rotating
  • the first transmission nut 7 moves up and down along the axial direction of the hollow shaft 2, and the first transmission nut 7 drives the inner tube 8 to move up and down, thereby realizing the lifting of the lifting column
  • the upper end of the sleeve and the gear box cover can also be connected by snaps.
  • the lower end of the sleeve and the first transmission nut may also be connected by a snap.
  • a limiting protrusion may be provided in the accommodating groove, and a limiting hole is provided on the second transmission nut.
  • the top plate 81 is a flexible top plate, that is, the top plate is made of a flexible material.
  • the driving device can be set with no gap between the flexible top plate and the flexible top plate can be Buffer the vibration of the drive.
  • the transmission assembly further includes a middle tube 10, and the middle tube 10 is located between the inner tube 8 and the outer tube 9.
  • the advantage of this setting is that by installing three sections of tubes for simultaneous expansion and contraction, the installation distance of the lifting columns can be reduced.
  • the lower end of the hollow shaft 2 is provided with a second transmission nut 6 fixed in a circumferential position, the second transmission nut 6 is threadedly engaged with the transmission screw 1, and the hollow shaft 2 is rotatably connected to the second transmission nut 6 is positioned in the axial direction, the outer part of the second transmission nut 6 is provided with a locking structure 61 which restricts the rotation of the second transmission nut 6, and the locking structure 61 is fixedly connected to the lower end of the middle tube 10, along the second transmission nut 6 When moving in the axial direction, the middle tube 10 can be driven to rise and fall relative to the outer tube, making the transmission more stable.
  • the motor in the driving device 5 drives the sun gear to rotate, the sun gear drives the helical gear planet carrier to rotate, the helical gear planet carrier drives the spur gear planet carrier to rotate, and the spur gear planet carrier drives the spline sleeve 551 rotates, the spline sleeve 551 drives the guide tube 3 to rotate, and the guide tube 3 drives the hollow shaft 2 to rotate synchronously through the first transmission component 21, and the hollow shaft 2 drives the transmission screw 1 to rotate through the second transmission component 11, because the transmission screw 1
  • the upper limit of the axial direction with the bottom plate 91 so the second transmission nut 6 is lifted along the axial direction of the transmission screw 1, the second transmission nut 6 drives the middle tube 10 to rise and fall through the locking structure 61, and the hollow shaft 2 is rotating
  • the second drive nut 6 moves up and down
  • the first drive nut 7 moves up and down along the axial direction of the hollow shaft 2
  • the first drive nut 7 drives the inner tube 8 to move up

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

一种用于升降立柱的传动总成及升降立柱，升降立柱包括内管（8），传动总成包括中空心轴（2）、传动螺杆（1）、套装于中空心轴（2）外部的套管（4）、被限制于套管（4）内的导向管（3）及用于驱动导向管（3）旋转的驱动装置（5），导向管（3）与中空心轴（2）可同步旋转且导向管（3）与中空心轴（2）可沿着轴向相对伸缩，传动螺杆（1）可与中空心轴（2）同步旋转且传动螺杆（1）与中空心轴（2）可沿着轴向相对伸缩，驱动装置（5）位于内管（8）内且固定安装在套管（4）的上端，套管（4）的下端固定连接有与中空心轴（2）螺纹配合的第一传动螺母（7），第一传动螺母（7）与内管（8）固定连接，套管（4）的上端自由设置，驱动装置（5）造成的震动通过套管（4）传递到第一传动螺母（7）上，不会直接传递到内管（8）上方的升降平台上，使震感减小，传动总成的传动更加平稳，升降立柱升降的震动较小。

Description

一种用于升降立柱的传动总成及升降立柱 技术领域
本发明涉及升降立柱技术领域，尤其涉及一种用于升降立柱的传动总成及升降立柱。
背景技术
目前市面上升降桌、升降椅等升降机构的升降立柱往往将驱动装置设置在传动总成的上端且将驱动装置直接固定在升降平面的底面上实现升降立柱与升降平面的连接，因驱动装置中的电机在使用过程中容易产生震动，电机的震动很容易传递到升降平面上，使得升降平面在升降过程中发生较大的震动，影响用户的使用感受。
发明内容
本发明的目的在于提供一种传动平稳的用于升降立柱的传动总成及升降立柱。
为了达到上述目的，本发明采用如下技术方案：一种用于升降立柱的传动总成，升降立柱包括内管，传动总成包括设有外螺纹的中空心轴、位于中空心轴内的传动螺杆、套装于中空心轴外部的套管、被限制于套管内的导向管及用于驱动导向管旋转的驱动装置，导向管与中空心轴可同步旋转且导向管与中空心轴可沿着轴向相对伸缩，传动螺杆可与中空心轴同步旋转且传动螺杆与中空心轴可沿着轴向相对伸缩，驱动装置位于内管内且固定安装在套管的上端，套管的下端固定连接有与中空心轴螺纹配合的第一传动螺母，第一传动螺母与内管固定连接，套管的上端自由设置。
进一步的，所述内管的上端设有顶板，驱动装置与顶板之间存在间隙；或者，所述内管的上端设有柔性顶板，驱动装置与柔性顶板之间无间隙设置。
进一步的，所述驱动装置与内管之间存在间隙。
进一步的，所述传动总成还包括定位块，第一传动螺母的侧壁上设有定位槽，内管的下端设有定位孔，定位块依次穿过定位孔和定位槽以使第一传动螺母和内管在轴向方向上位置固定。
进一步的，所述驱动装置包括马达、齿轮箱箱体及位于齿轮箱箱体内的减速机构，减速机构包括连接于马达输出轴上的太阳轮、与太阳轮传动配合的斜齿轮行星架及与斜齿轮行星架的输出端配合的直齿轮行星架。
进一步的，所述套管的上端与驱动装置通过螺钉连接；或者，所述套管的上端与驱动装置通过卡扣连接。
进一步的，所述套管的下端与第一传动螺母通过螺钉连接；或者，所述套管的下端与第一传动螺母通过卡扣连接。
本发明还公开了一种升降立柱，包括传动总成及由内向外依次套装的内管和外管，其中，传动总成为任一上述技术方案中的用于升降立柱的传动总成。
进一步的，所述中空心轴的下端设有与传动螺杆螺纹配合的第二传动螺母，第二传动螺母的外部设有限制第二传动螺母旋转的抱死结构，抱死结构位于外管内且与外管活动配合。
进一步的，所述传动总成还包括中管，中管位于内管和外管之间，中空心轴的下端设有与传动螺杆螺纹配合的第二传动螺母，第二传动螺母的外部设有限制第二传动螺母旋转的抱死结构，抱死结构与中管的下端固定连接。
本发明中，“套管的上端自由设置”指的是套管的上端未被固定，浮动在内管内。
采用上述技术方案后，本发明具有如下优点：
1、通过将驱动装置设置在内管内并固定安装在套管的上端，因套管的下端 固定在第一传动螺母上，第一传动螺母固定在内管的下端，驱动装置造成的震动通过套管传递到第一传动螺母上再传递到内管的下端，而不会直接传递到内管上方的升降平台上，使得升降平台在升降过程中的产生的震动较小，传动总成的传动更加平稳，提升用户使用感受；同时，因震动直接传递到内管的下端，内管的下端往上部分基本不受力，极大地减小了内管的受力，提升内管的使用寿命。
2、通过设置驱动装置与顶板之间存在间隙，使得驱动装置在使用过程中不容易与顶板接触，不会通过顶板将震动传递给升降平台，进一步提升减震效果，使得传动总成的传动更加平稳。或者，顶板为柔性顶板，即顶板采用柔性材料制成，此时，因柔性顶板可以缓冲驱动装置的震动，驱动装置可以与柔性顶板之间无间隙设置。
3、驱动装置与内管之间存在间隙，使得驱动装置在使用过程中不容易与内管壁接触，不会通过内管的上端将震动传递给升降平台，进一步提升减震效果，使得传动总成的传动更加平稳。
4、通过设置定位块，定位块依次穿过定位孔和定位槽以使第一传动螺母和内管在轴向方向上位置固定，且固定简单方便。
5、通过设置斜齿轮行星架和直齿轮行星架配合，使得驱动装置的动力传递更加平稳，减少噪音的产生，进一步提升传动总成传动的稳定性。
6、套管的上端与驱动装置通过螺钉连接，因螺纹具有自锁性，使得驱动装置和套管的连接比较可靠，同时，连接比较简单、可靠。或者，通过卡扣连接，使得拆装简单方便、无需借助工具。
7、套管的下端与第一传动螺母通过螺钉连接，因螺纹具有自锁性，使得驱动装置和套管的连接比较可靠，同时，连接比较简单、可靠。或者，通过卡扣 连接，使得拆装简单方便、无需借助工具。
8、本发明还公开了一种升降立柱，升降立柱包括传动总成及由内向外依次套装的内管和外管，因传动总成运行较为平稳、噪音小，使得升降立柱在升降过程中较为稳定，震动较小。
9、通过设置抱死结构与外管活动配合，抱死结构与外管在轴向方向上可自由移动，抱死结构可随第二传动螺母在外管内升降。
10、通过设置中管，使得传动总成可以分三段管进行伸缩，可以减小升降立柱的安装距，通过将抱死结构与中管的下端固定，在第二传动螺母沿着轴向移动时，可以带动中管相对于外管升降，使得传动更加平稳。
附图说明
下面结合附图对本发明作进一步说明：
图1为本发明实施例一所述传动总成的结构示意图。
图2为本发明实施例一所述传动总成的剖视图。
图3为图2中A的放大图。
图4为图2中B的放大图。
图5为本发明实施例一所述传动总成的爆炸图。
图6为本发明实施例一所述传动总成中驱动装置的爆炸图。
图7为本发明实施例一所述升降立柱的剖视图。
图8为本发明实施例二所述升降立柱的部分剖视图。
图9为本发明实施例三所述升降立柱的剖视图。
图中所标各部件名称如下：
1、传动螺杆；11、第二传动部件；2、中空心轴；21、第一传动部件；3、导向管；4、套管；5、驱动装置；51、马达；52、齿轮箱箱体；521、齿轮箱外 壳；522、齿轮箱箱盖；53、太阳轮；54、斜齿轮行星架；55、直齿轮行星架；551、花键套；6、第二传动螺母；61、抱死结构；611、第一抱死块；612、第二抱死块；7、第一传动螺母；71、定位槽；8、内管；81、顶板；82、定位块；9、外管；91、底板；10、中管。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明。需要理解的是，下述的“上”、“下”、“左”、“右”、“纵向”、“横向”、“内”、“外”、“竖直”、“水平”、“顶”、“底”等指示方位或位置关系的词语仅基于附图所示的方位或位置关系，仅为了便于描述本发明和简化描述，而不是指示或暗示所指的装置/元件必须具有特定的方位或以特定的方位构造和操作，因此不能理解为对本发明的限制。
实施例一：
如图1至图6所示，本发明提供一种用于升降立柱的传动总成，升降立柱包括内管8，传动总成包括设有外螺纹的中空心轴2、位于中空心轴2内的传动螺杆1、套装于中空心轴2外部的套管4、以可旋转的方式被限制在套管4内的导向管3及用于驱动导向管3旋转的驱动装置5，导向管3与中空心轴2可同步旋转且导向管3与中空心轴2可沿着轴向相对伸缩，传动螺杆1可与中空心轴2同步旋转且传动螺杆1与中空心轴2可沿着轴向相对伸缩，驱动装置5位于内管8内且固定安装在套管4的上端，套管4的下端固定连接有第一传动螺母7，第一传动螺母7与中空心轴2螺纹配合，第一传动螺母7与内管8固定连接，套管4的上端自由设置，套管的上端未被固定，浮动在内管内，驱动装置5造成的震动通过套管4传递到第一传动螺母7上再传递到内管8的下端，而不会直接传递到内管8上方的升降平台上，使得升降平台在升降过程中的产生的震动较小，传动总成的传动更加平稳，提升用户使用感受；同时，因震动直接传 递到内管的下端，内管的下端往上部分基本不受力，极大地减小了内管的受力，提升内管的使用寿命。
本实施例中，内管8的上端设有顶板81，驱动装置5与内管8和顶板81之间均存在间隙，使得驱动装置5在使用过程中不容易与内管8和顶板81接触，不会通过顶板81和内管8将震动传递给升降平台，进一步提升传动总成的减震效果。
驱动装置5包括马达51、齿轮箱箱体52及位于齿轮箱箱体52内的减速机构，减速机构包括连接于马达51输出轴上的太阳轮53、与太阳轮53传动配合的斜齿轮行星架54及与斜齿轮行星架54的输出端配合的直齿轮行星架55。齿轮箱箱体52包括齿轮箱外壳521和齿轮箱箱盖522，减速结构位于齿轮箱外壳521与齿轮箱箱盖522构成的内腔内，通过设置斜齿轮行星架54和直齿轮行星架55配合，使得驱动装置5的动力传递更加平稳，减少噪音的产生，进一步提升传动总成的减震效果。
直齿轮行星架55的输出端设有花键套551，导向管3上设有内花键，花键套551与内花键配合使得导向管3与直齿轮行星架55可以同步转动。
具体的，导向管3与中空心轴2通过第一传动部件21传动连接，第一传动部件21固定安装在中空心轴2的上端，第一传动部件21的横截面形状与导向管3的横截面形状相配合，使得第一传动部件21只能相对于导向管3轴向移动而不能周向转动。
传动螺杆1与中空心轴2通过第二传动部件11传动连接，第二传动部件11固定安装在传动螺杆1的上端，第二传动部件11的横截面形状与中空心轴2的横截面形状相配合，使得第二传动部件11只能相对于中空心轴2轴向移动而不能周向转动。
传动总成还包括定位块82，第一传动螺母7的侧壁上设有定位槽71，内管8的下端设有定位孔，定位块82依次穿过定位孔和定位槽71以使第一传动螺母7和内管8在轴向方向上位置固定，且固定简单方便。
套管4的上端与驱动装置5的齿轮箱箱盖522通过螺钉连接，因螺纹具有自锁性，使得驱动装置5和套管4的连接比较可靠，同时，连接比较简单、可靠。套管4的横截面为正方形，螺钉设有四个且分别位于套管4的四角上，使得套管4与驱动装置5的连接更加稳定、可靠。
套管4的下端与第一传动螺母7通过螺钉连接，螺钉穿过第一传动螺母7与套管4配合以使套管4与第一传动螺母7固定，因螺纹具有自锁性，使得驱动装置5和套管4的连接比较可靠，同时，连接比较简单、可靠。具体的螺钉设有四个且分别位于套管4的四角上，使得套管4与第一传动螺母7的连接更加稳定、可靠。
如图7所示，本发明还公开了一种升降立柱，包括传动总成及由内向外依次套装的内管8和外管9，传动总成为任一上述技术方案中的用于升降立柱的传动总成，因传动总成运行较为平稳、噪音小，使得升降立柱在升降过程中较为稳定，震动较小。外管9的下端设有底板91，传动螺杆1的下端固定在底板91上，升降立柱通过底板91固定在安装平面上。
中空心轴2的下端设有周向位置固定的第二传动螺母6，第二传动螺母6与传动螺杆1螺纹配合，中空心轴2以可旋转的方式与第二传动螺母6在轴向上定位，第二传动螺母6的外部设有限制第二传动螺母6旋转的抱死结构61，抱死结构61位于外管9内且与外管9活动配合，通过设置抱死结构61与外管9活动配合，抱死结构61与外管9在轴向方向上可自由移动，抱死结构61可随第二传动螺母6在外管9内升降。
具体的，抱死结构61包括第一抱死块611和第二抱死块612，第一抱死块611和第二抱死块612抱合后形成容置槽，第二传动螺母6位于容置槽内，容置槽内设有限位孔，第二传动螺母6上设有限位凸起，限位槽与限位凸起配合使抱死结构61与第二传动螺母6的周向相对位置固定，限制第二传动螺母6旋转，同时，抱死结构61的横截面形状与外壳的横截面形状相配合，使得抱死结构61在外壳内只能轴向移动而不能周向旋转。
本实施例中的升降立柱的运行过程：驱动装置5中的马达51驱动太阳轮53旋转，太阳轮53带动斜齿轮行星架54旋转，斜齿轮行星架54带动直齿轮行星架55旋转，直齿轮行星架55带动花键套551旋转，花键套551带动导向管3转动，导向管3通过第一传动部件21带动中空心轴2同步旋转，中空心轴2通过第二传动部件11带动传动螺杆1旋转，由于传动螺杆1与底板91在轴向上限位，因此第二传动螺母6向沿着传动螺杆1的轴向进行升降，中空心轴2在旋转的同时随第二传动螺母6进行升降，第一传动螺母7沿着中空心轴2的轴向进行升降，第一传动螺母7带动内管8进行升降，从而实现升降立柱的升降。
可以理解的，驱动装置与内管之间也可以无间隙设置。
可以理解的，套管的上端与齿轮箱箱盖也可以通过卡扣连接。
可以理解的，套管的下端与第一传动螺母也可以通过卡扣连接。
可以理解的，也可以是容置槽内设有限位凸起，第二传动螺母上设有限位孔。
实施例二：
如图8所示，本实施例与实施例一的主要区别在于，顶板81为柔性顶板，即顶板采用柔性材料制成，此时，驱动装置可以与柔性顶板之间无间隙设置，柔性顶板可以缓冲驱动装置的震动。
实施例三：
如图9所示，本实施例与实施例一的主要区别在于，传动总成还包括中管10，中管10位于内管8和外管9之间。这样设置的好处在于，通过设置三段管进行同步伸缩，可以减小升降立柱的安装距。
本实施例中，中空心轴2的下端设有周向位置固定的第二传动螺母6，第二传动螺母6与传动螺杆1螺纹配合，中空心轴2以可旋转的方式与第二传动螺母6在轴向上定位，第二传动螺母6的外部设有限制第二传动螺母6旋转的抱死结构61，抱死结构61与中管10的下端固定连接，在第二传动螺母6沿着轴向移动时，可以带动中管10相对于外管升降，使得传动更加平稳。
本实施例中的升降立柱的运行过程：驱动装置5中的马达驱动太阳轮旋转，太阳轮带动斜齿轮行星架旋转，斜齿轮行星架带动直齿轮行星架旋转，直齿轮行星架带动花键套551旋转，花键套551带动导向管3转动，导向管3通过第一传动部件21带动中空心轴2同步旋转，中空心轴2通过第二传动部件11带动传动螺杆1旋转，由于传动螺杆1与底板91在轴向上限位，因此第二传动螺母6向沿着传动螺杆1的轴向进行升降，第二传动螺母6通过抱死结构61带动中管10升降，中空心轴2在旋转的同时随第二传动螺母6进行升降，第一传动螺母7沿着中空心轴2的轴向进行升降，第一传动螺母7带动内管8进行升降，从而实现升降立柱的升降。
除上述优选实施例外，本发明还有其他的实施方式，本领域技术人员可以根据本发明作出各种改变和变形，只要不脱离本发明的精神，均应属于本发明所附权利要求所定义的范围。

Claims (10)

  1. 一种用于升降立柱的传动总成，升降立柱包括内管，传动总成包括设有外螺纹的中空心轴、位于中空心轴内的传动螺杆、套装于中空心轴外部的套管、被限制于套管内的导向管及用于驱动导向管旋转的驱动装置，导向管与中空心轴可同步旋转且导向管与中空心轴可沿着轴向相对伸缩，传动螺杆可与中空心轴同步旋转且传动螺杆与中空心轴可沿着轴向相对伸缩，其特征在于，所述驱动装置位于内管内且固定安装在套管的上端，套管的下端固定连接有与中空心轴螺纹配合的第一传动螺母，第一传动螺母与内管固定连接，套管的上端自由设置。
  2. 根据权利要求1所述的传动总成，其特征在于，所述内管的上端设有顶板，驱动装置与顶板之间存在间隙；或者，所述内管的上端设有柔性顶板，驱动装置与柔性顶板之间无间隙设置。
  3. 根据权利要求1所述的传动总成，其特征在于，所述驱动装置与内管之间存在间隙。
  4. 根据权利要求1所述的传动总成，其特征在于，所述传动总成还包括定位块，第一传动螺母的侧壁上设有定位槽，内管的下端设有定位孔，定位块依次穿过定位孔和定位槽以使第二传动螺母和内管在轴向方向上位置固定。
  5. 根据权利要求1所述的传动总成，其特征在于，所述驱动装置包括马达、齿轮箱箱体及位于齿轮箱箱体内的减速机构，减速机构包括连接于马达输出轴上的太阳轮、与太阳轮传动配合的斜齿轮行星架及与斜齿轮行星架的输出端配合的直齿轮行星架。
  6. 根据权利要求1所述的传动总成，其特征在于，所述套管的上端与驱动装置通过螺钉连接；或者，所述套管的上端与驱动装置通过卡扣连接。
  7. 根据权利要求1所述的传动总成，其特征在于，所述套管的下端与第一传动 螺母通过螺钉连接；或者，所述套管的下端与第一传动螺母通过卡扣连接。
  8. 一种升降立柱，包括传动总成及由内向外依次套装的内管和外管，其特征在于，所述传动总成为权利要求1至7任意一项所述的用于升降立柱的传动总成。
  9. 根据权利要求8所述的升降立柱，其特征在于，所述中空心轴的下端设有与传动螺杆螺纹配合的第二传动螺母，第二传动螺母的外部设有限制第二传动螺母旋转的抱死结构，抱死结构位于外管内且与外管活动配合。
  10. 根据权利要求8所述的升降立柱，其特征在于，所述传动总成还包括中管，中管位于内管和外管之间，中空心轴的下端设有与传动螺杆螺纹配合的第二传动螺母，第二传动螺母的外部设有限制第二传动螺母旋转的抱死结构，抱死结构与中管的下端固定连接。
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