WO2021110002A1 - 一种低安装距的升降立柱 - Google Patents

一种低安装距的升降立柱 Download PDF

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Publication number
WO2021110002A1
WO2021110002A1 PCT/CN2020/133177 CN2020133177W WO2021110002A1 WO 2021110002 A1 WO2021110002 A1 WO 2021110002A1 CN 2020133177 W CN2020133177 W CN 2020133177W WO 2021110002 A1 WO2021110002 A1 WO 2021110002A1
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WO
WIPO (PCT)
Prior art keywords
screw rod
tube
guide sleeve
nut
screw
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Application number
PCT/CN2020/133177
Other languages
English (en)
French (fr)
Inventor
胡仁昌
陆小健
潘坚
Original Assignee
浙江捷昌线性驱动科技股份有限公司
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
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 US17/761,204 priority Critical patent/US11975953B2/en
Priority to EP20895030.3A priority patent/EP4046957B1/en
Publication of WO2021110002A1 publication Critical patent/WO2021110002A1/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
    • 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
    • B66F3/18—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through worm gearings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
    • E04H12/182—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic telescopic
    • 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
    • B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors
    • 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
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/209—Arrangements for driving the actuator using worm gears
    • 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
    • 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
    • F16H25/2056—Telescopic screws with at least three screw members in coaxial arrangement

Definitions

  • the invention relates to the technical field of a lifting column, in particular to a lifting column with a low installation distance.
  • the lifting column has been widely used in daily life due to its adjustable height and convenient handling.
  • the installation distance of the lifting column refers to the height of the lifting column when it is in the retracted state.
  • the current lifting columns on the market are generally two-section lifting For pipes or three-section lifting pipes, in order to meet a longer stroke, the installation distance of the lifting column is relatively large, so that the height of the lifting column is still high when the lifting column is in a retracted state, and the transportation is still not convenient.
  • the purpose of the present invention is to provide a lifting column with a low installation distance.
  • a low installation distance lifting column including a driving device, a lifting tube, and a transmission assembly located inside the lifting tube
  • the lifting tube includes a first tube that is sequentially sleeved from the inside to the outside, The second tube, the third tube, the fourth tube and the fifth tube.
  • the lower end of the fifth tube is fixed on the driving device.
  • the transmission assembly includes a first screw rod, a hollow second screw rod, and a hollow screw rod that are sleeved from the inside to the outside.
  • the third screw rod and the hollow fourth screw rod, the output end of the driving device is matched with the first screw rod and can drive the first screw rod to rotate, and the lower end of the second screw rod is provided with a threaded transmission connection with the first screw rod
  • the lower end of the third screw rod is provided with a second nut threadedly connected to the second screw rod, and the lower end of the fourth screw rod is provided with a third nut threadedly connected to the third screw rod.
  • the first tube There is a fourth nut screw-drivingly connected with the fourth screw rod at the lower end.
  • the upper end of the first screw rod is provided with a first guide sleeve that restricts the axial position of the first nut
  • the upper end of the second screw rod is provided with a second guide sleeve that restricts the axial position of the second nut.
  • the upper end of the rod is provided with a third guide sleeve for limiting the axial position of the third nut
  • the upper end of the fourth screw rod is provided with a fourth guide sleeve for limiting the axial position of the fourth nut.
  • the outer wall of the first guide sleeve is matched with the inner wall of the second screw
  • the outer wall of the second guide sleeve is matched with the inner wall of the third screw
  • the outer wall of the third guide sleeve is matched with the inner wall of the fourth screw.
  • the outer wall of the fourth guide sleeve is matched with the inner wall of the first tube.
  • a positioning groove is provided in the circumferential direction of the fourth screw rod, and the fourth guide sleeve is rotatably provided on the positioning groove.
  • the fourth guide sleeve is provided with an opening which is convenient for the fourth guide sleeve to be radially pressed into the positioning groove.
  • first guide sleeve and the first screw are fixedly connected by screws
  • second guide sleeve and the second screw are fixedly connected by screws
  • third guide sleeve and the third screw are fixedly connected by screws.
  • oil grooves are provided on the inner walls of the second screw rod, the third screw rod and the fourth screw rod, and the oil grooves are arranged along the axial direction of the screw rod.
  • a self-locking device is sleeved on the lower end of the first screw rod, and the self-locking device includes a torsion spring seat and a torsion spring sleeved on the torsion spring seat.
  • the fourth nut and the first tube are fixed by riveting.
  • the lifting pipes are all square pipes.
  • the present invention has the following advantages:
  • the lifting pipe includes the first pipe, the second pipe, the third pipe, the fourth pipe and the fifth pipe which are set in sequence from the inside to the outside.
  • the installation distance of each section of the lifting pipe can be reduced.
  • the first screw rod, the second screw rod, the third screw rod, the fourth screw rod and the first pipe are connected by a threaded transmission, and the nut is installed on the adjacent screw rod, located at the same
  • there is no need to install additional fixing nut devices which makes the axial and radial of the transmission assembly more compact, further reduces the installation distance of the lifting column, and realizes the low installation distance and large stroke of the lifting column.
  • the axial positions of the first nut, the second nut, the third nut and the fourth nut are restricted respectively, so that each nut
  • the axial movement distance is restricted, that is, the axial position of each screw is restricted.
  • the transmission of the first guide sleeve is relatively stable when it moves in the second screw rod, so that the overall lifting is relatively stable; for the same reason, by setting The second guide sleeve is matched with the inner wall of the third screw rod, the third guide sleeve is matched with the inner wall of the fourth screw rod, and the fourth guide sleeve is matched with the inner wall of the first tube, so that the transmission during the whole lifting process is relatively smooth.
  • the fourth guide sleeve is rotatably arranged in the positioning groove, so that the axial position of the fourth guide sleeve and the fourth screw rod are fixed, and the circumferential direction can be freely rotated , Thereby enabling relative rotation between the fourth screw rod and the first tube.
  • the fourth guide sleeve is radially pressed into the positioning groove through the opening, which makes the installation of the fourth guide sleeve more convenient.
  • the first guide sleeve and the first screw are fixedly connected by screws
  • the second guide sleeve and the second screw are fixedly connected by screws
  • the third guide sleeve and the third screw are fixedly connected by screws, so that the first guide sleeve,
  • the disassembly and assembly of the second guide sleeve and the third guide sleeve are more convenient, and the connection is more reliable due to the self-locking nature of the threads.
  • Oil grooves are provided on the inner walls of the second screw rod, the third screw rod and the fourth screw rod.
  • the oil groove is arranged along the axial direction of the screw rod to facilitate the processing of the second screw rod, the third screw rod and the fourth screw rod.
  • the oil groove can store grease, thereby reducing the friction between the first guide sleeve and the second screw, the friction between the second guide sleeve and the third screw, and the third guide sleeve and the fourth screw. Friction between.
  • the torsion spring seat restricts the axial position of the torsion spring.
  • the torsion spring restricts the rotation of the first screw rod and acts as a self-locking function. Make the use of the transmission assembly more reliable.
  • the fourth nut is fixed on the first pipe by riveting, so that the fourth nut cannot rotate circumferentially, and the riveting process is simple and the connection is reliable.
  • FIG. 1 is a schematic diagram of the structure of the lifting column according to the first embodiment of the present invention.
  • Fig. 2 is a partial structural diagram of the lifting column according to the first embodiment of the present invention.
  • Fig. 3 is a cross-sectional view of the lifting column according to the first embodiment of the present invention.
  • Fig. 4 is an enlarged view of A in Fig. 3.
  • Fig. 5 is an enlarged view of B in Fig. 3.
  • FIG. 6 is a schematic diagram of the cooperation between the fourth screw rod and the fourth guide sleeve in the lifting column according to the first embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the lifting column according to the second embodiment of the present invention.
  • Fig. 8 is a partial structural diagram of the lifting column according to the second embodiment of the present invention.
  • Driving device lifting tube; 210, first tube; 211, fourth nut; 220, second tube; 230, third tube; 240, fourth tube; 250, fifth tube; 300, transmission assembly Into; 310, the first screw; 311, the first guide sleeve; 312, the torsion spring; 313, the torsion spring seat; 320, the second screw; 321, the first nut; 322, the second guide sleeve; 330, the first Three screw rod; 331, second nut; 332, third guide sleeve; 340, fourth screw rod; 341, third nut; 342, fourth guide sleeve; 3421, opening; 343, positioning groove; 400, first Slider; 500, second slide; 600, third slide; 700, fourth slide; 800, lower slide; 900, oil groove.
  • the present invention provides a lifting column with a low installation distance, which includes a driving device 100, a lifting pipe 200, and a transmission assembly 300 located inside the lifting pipe 200.
  • the lower end of the fifth tube 250 is fixed on the driving device 100, and the driving device is located at the lower end of the lifting column.
  • the upper end of the first tube 210 is fixed on the lifting platform.
  • the lifting column is in an upside-down state.
  • the first screw rod 310, the hollow second screw rod 320, the hollow third screw rod 330 and the hollow fourth screw rod 340 are set in sequence, and the output end of the driving device 100 is in cooperation with the first screw rod 310 and can be driven
  • the first screw rod 310 rotates
  • the lower end of the second screw rod 320 is provided with a first nut 321 which is screw-drivingly connected with the first screw rod 310
  • the lower end of the third screw rod 330 is provided with a screw-driving connection with the second screw rod 320.
  • the second nut 331, the lower end of the fourth screw 340 is provided with a third nut 341 which is threadedly connected to the third threaded rod 330
  • the lower end of the first tube 210 is provided with a fourth nut which is threadedly connected to the fourth threaded rod 340 211.
  • the first screw rod, the second screw rod, the third screw rod, the fourth screw rod and the first tube are connected by a threaded transmission, and the nut is installed on the adjacent screw rods, and is located on the adjacent two screw rods.
  • there is no need to install additional fixing nut devices making the transmission assembly more compact in the axial and radial directions, further reducing the installation distance of the lifting column, and realizing the low installation distance and large stroke of the lifting column.
  • the upper end of the first screw rod 310 is provided with a first guide sleeve 311 that limits the axial position of the first nut 321, and the first guide sleeve 311 and the first screw rod 310 are fixedly connected by screws.
  • the upper end of the second screw 320 is provided with a second guide sleeve 322 that limits the axial position of the second nut 331, and the second guide sleeve 322 is fixedly connected with the second screw 320 by screws;
  • the upper end of the third screw 330 is provided with The third guide sleeve 332 that restricts the axial position of the third nut 341 is fixedly connected with the third screw 330 by screws;
  • the upper end of the fourth screw 340 is provided with a second guide sleeve that restricts the axial position of the fourth nut 211
  • Four guide sleeve 342, combined with FIG. 6, the fourth screw rod 340 is provided with a positioning groove 343 in the circumferential direction.
  • the fourth guide sleeve 342 By providing an opening 3421 on the fourth guide sleeve 342, the fourth guide sleeve is radially pressed into the positioning groove through the opening, so that The axial position of the fourth guide sleeve and the fourth screw rod is fixed, and the circumferential direction can be freely rotated, so that relative rotation can occur between the fourth screw rod and the first tube.
  • the outer wall of the first guide sleeve 311 is matched with the inner wall of the second screw rod 320, so that when the first guide sleeve 311 moves in the second screw rod 320, the transmission is relatively stable; the outer wall of the second guide sleeve 322 and the third screw rod
  • the inner walls of 330 are matched, so that when the second guide sleeve 322 moves in the third screw 330, the transmission is relatively stable;
  • the outer wall of the third guide sleeve 332 matches the inner wall of the fourth screw 340, so that the third guide sleeve 332
  • the lifting pipes 200 are all square pipes, which can restrict the rotation between adjacent lifting pipes.
  • the outer wall of the fourth guide sleeve 342 matches the inner wall of the first pipe 210, Therefore, the fourth guide sleeve is a square guide sleeve, so that when the fourth guide sleeve moves in the first tube, the transmission is relatively stable, and thus the transmission during the entire lifting process is relatively stable.
  • the ascending operation process of the lifting column is as follows: the output end of the driving device 100 drives the first screw rod 310 to rotate, and the fourth nut 211 is fixed on the first tube 210 and cannot rotate, and the thread helix angle of the first nut 321 is the largest. Therefore, the first nut 321 moves upward along the first screw rod 310 and drives the remaining screw rods to move upward as a whole. At this time, the first guide sleeve 311 rotates and translates in the second screw rod 320 to ensure the smooth movement of the whole; When a nut 321 contacts the first guide sleeve 311, the axial movement of the first screw rod 310 stops, and the second screw rod 320 rotates with the first screw rod 310.
  • the helix angle of the second nut 331 is at the second The nut 331, the third nut 341, and the fourth nut 211 are the largest.
  • the second nut 331 starts to move upward along the second screw rod 320.
  • the second guide sleeve 322 rotates and translates in the third screw rod 330 to ensure the overall The movement is smooth; when the second nut 331 is in contact with the second guide sleeve 322, the axial movement of the second screw rod 320 stops, and the third screw rod 330 follows the first screw rod 310 and the second screw rod 320 to rotate.
  • the helix angle of the third nut 341 is the largest among the third nut 341 and the fourth nut 211.
  • the third nut 341 starts to move upward along the third screw rod 330.
  • the third guide sleeve 332 is in the fourth screw rod 340.
  • Internal rotation and translation ensure the stability of the overall movement; when the third nut 341 contacts the third guide sleeve 332, the axial movement of the third screw rod 330 stops, and the fourth screw rod 340 follows the first screw rod 310 and the second screw rod 310.
  • the screw 320 and the third screw 330 rotate.
  • the fourth nut 211 moves upward along the fourth screw 340, and the fourth guide sleeve 342 translates in the first tube 210 to ensure the smooth movement of the whole.
  • a first sliding block 400 is arranged between the first tube 210 and the second tube 220, the first sliding block 400 is fixed to the lower end of the first tube 210, and a second sliding block is arranged between the second tube 220 and the third tube 230 500, the second sliding block 500 is fixed to the lower end of the second tube 220, a third sliding block 600 is provided between the third tube 230 and the fourth tube 240, and the third sliding block 600 is fixed to the lower end of the third tube 230.
  • a fourth slider 700 is provided between the fourth tube 240 and the fifth tube 250. The fourth slider 700 is fixed to the lower end of the fourth tube 240.
  • the second tube 220, the third tube 230, the fourth tube 240 and the fifth tube The upper end of the inner wall of the 250 is provided with a static slider.
  • the upper limit of the second tube is realized by the second slider contacting the static slider on the inner wall of the third tube.
  • the upper limit of the third tube is achieved by the third slider and the fourth tube.
  • the static sliding block on the wall is in contact, and the upper limit of the fourth tube is realized by the fourth sliding block being in contact with the static sliding block on the inner wall of the fifth tube.
  • the lower end of the inner wall of the fifth tube 250 is provided with a lower sliding block 800, and the lower limit of the second tube 220 and the third tube 230 is realized by the second tube 220 and the third tube 230 contacting the lower sliding block.
  • the inner walls of the second screw rod 320, the third screw rod 330, and the fourth screw rod 340 are all provided with an oil groove 900.
  • the oil groove 900 is arranged along the axial direction of the screw rod. The arrangement of the oil groove is convenient for the second screw rod, the third screw rod and the The processing of the fourth screw rod, while the oil groove can store grease, thereby reducing the friction between the first guide sleeve and the second screw, the friction between the second guide sleeve and the third screw, and the third guide sleeve Friction force with the fourth screw.
  • a self-locking device is sleeved on the lower end of the first screw 310.
  • the self-locking device includes a torsion spring seat 313 and a torsion spring 312 sleeved on the torsion spring seat 313.
  • the torsion spring seat 313 limits the axial position of the torsion spring 312.
  • the torsion spring 312 restricts the rotation of the first screw rod 310 and plays a self-locking role, making the use of the transmission assembly more reliable.
  • the fourth nut 211 and the first tube 210 are fixed by riveting, so that the fourth nut cannot rotate circumferentially, and the riveting process is simple and the connection is reliable.
  • the main difference between this embodiment and the first embodiment is that the lifting column is in an upright installation state.
  • the driving device 100 when the lifting column is in the upright installation state, the driving device 100 is fixed on the lifting platform, the lifting pipe 200 is located at the lower end of the driving device 100, the first nut 321 is located at the upper end of the second screw 320, and the second The nut 331 is located at the upper end of the third screw rod 330, the third nut 341 is located at the upper end of the fourth screw rod 340, and the fourth nut 221 is located at the upper end of the first tube 210.
  • the present invention has other embodiments.
  • Those skilled in the art can make various changes and modifications according to the present invention. As long as they do not deviate from the spirit of the present invention, they should all be defined by the appended claims of the present invention. range.

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Abstract

一种低安装距的升降立柱，包括驱动装置（100）、升降管（200）及传动总成，升降管（200）包括第一管（210）、第二管（220）、第三管（230）、第四管（240）和第五管（250），第五管（250）的下端固定于驱动装置（100）上，传动总成包括第一丝杆（310）、第二丝杆（320）、第三丝杆（330）和第四丝杆（340），驱动装置（100）的输出端与第一丝杆（310）传动配合且可驱动第一丝杆（310）旋转，第二丝杆（320）的下端设有与第一丝杆（310）螺纹传动连接的第一螺母（321），第三丝杆（330）的下端设有与第二丝杆（320）螺纹传动连接的第二螺母（331），第四丝杆（340）的下端设有与第三丝杆（330）螺纹传动连接的第三螺母（341），第一管（210）的下端设有与第四丝杆（340）螺纹传动连接的第四螺母（211），相邻丝杆通过螺纹传动连接，且螺母位于相邻两个丝杆之间，使得传动总成的轴向和径向都更加紧凑，实现升降立柱的低安装距大行程。

Description

一种低安装距的升降立柱 技术领域
本发明涉及升降立柱技术领域，尤其涉及一种低安装距的升降立柱。
背景技术
升降立柱因高度可调、搬运方便的优点在日常生活中得到了广泛的应用，升降立柱的安装距指的是升降立柱处于收缩状态时的高度，目前市面上的升降立柱一般为两节式升降管或三节式升降管，为满足较长的行程，升降立柱的安装距都较大，使得升降立柱处于收缩状态时高度依然较高，搬运仍然不够便利。
发明内容
本发明的目的在于提供一种低安装距的升降立柱。
为了达到上述目的，本发明采用如下技术方案：一种低安装距的升降立柱，包括驱动装置、升降管及位于升降管内部的传动总成，升降管包括由内向外依次套装的第一管、第二管、第三管、第四管和第五管，第五管的下端固定于驱动装置上，传动总成包括由内向外依次套装的第一丝杆、中空的第二丝杆、中空的第三丝杆和中空的第四丝杆，驱动装置的输出端与第一丝杆传动配合且可驱动第一丝杆旋转，第二丝杆的下端设有与第一丝杆螺纹传动连接的第一螺母，第三丝杆的下端设有与第二丝杆螺纹传动连接的第二螺母，第四丝杆的下端设有与第三丝杆螺纹传动连接的第三螺母，第一管的下端设有与第四丝杆螺纹传动连接的第四螺母。
进一步的，所述第一丝杆的上端设有限制第一螺母轴向位置的第一导向套，第二丝杆的上端设有限制第二螺母轴向位置的第二导向套，第三丝杆的上端设有限制第三螺母轴向位置的第三导向套，第四丝杆的上端设有限制第四螺母轴向位置的第四导向套。
进一步的，所述第一导向套的外壁与第二丝杆的内壁相配合，第二导向套的外壁与第三丝杆的内壁相配合，第三导向套的外壁与第四丝杆的内壁相配合，第四导向套的外壁与第一管的内壁相配合。
进一步的，所述第四丝杆的周向上设有定位槽，第四导向套可转动地设于定位槽上。
进一步的，所述第四导向套上设有便于第四导向套径向压入定位槽的开口。
进一步的，所述第一导向套与第一丝杆通过螺钉固定连接，第二导向套与第二丝杆通过螺钉固定连接，第三导向套与第三丝杆通过螺钉固定连接。
进一步的，所述第二丝杆、第三丝杆和第四丝杆的内壁上均设有油槽，油槽沿丝杆的轴向设置。
进一步的，所述第一丝杆的下端套设有自锁装置，自锁装置包括扭簧座和套设于扭簧座上的扭簧。
进一步的，所述第四螺母与第一管通过铆接固定。
进一步的，所述升降管均为方形管。
采用上述技术方案后，本发明具有如下优点：
1、升降管包括由内向外依次套装的第一管、第二管、第三管、第四管和第五管，通过将升降立柱设置成五节，可以减小每节升降管的安装距，使得安装距较低，第一丝杆、第二丝杆、第三丝杆、第四丝杆和第一管之间通过螺纹传动连接，且螺母安装在相邻的丝杆上，位于相邻两个丝杆之间，无需另外设置固定螺母的装置，使得传动总成的轴向和径向都更加紧凑，进一步降低升降立柱的安装距，实现升降立柱的低安装距大行程。
2、通过设置第一导向套、第二导向套、第三导向套和第四导向套，分别限制第一螺母、第二螺母、第三螺母和第四螺母的轴向位置，使得每个螺母的轴 向移动距离受到限制，即每个丝杆的轴向位置受到限制。
3、通过设置第一导向套的外壁与第二丝杆的内壁相配合，使得第一导向套在第二丝杆内移动时，传动比较平稳，使得整体的升降比较平稳；同理，通过设置第二导向套与第三丝杆的内壁相配合，第三导向套与第四丝杆的内壁相配合，第四导向套与第一管的内壁相配合，使得整个升降过程中的传动都比较平稳。
4、通过在第四丝杆的周向上设置定位槽，第四导向套可转动地设置在定位槽内，使得第四导向套与第四丝杆的轴向位置固定，周向方向可自由转动，进而使得第四丝杆与第一管之间可以发生相对转动。
5、通过在第四导向套上设置开口，第四导向套通过开口径向压入定位槽内，使得第四导向套的安装更加方便。
6、第一导向套与第一丝杆通过螺钉固定连接，第二导向套与第二丝杆通过螺钉固定连接，第三导向套与第三丝杆通过螺钉固定连接，使得第一导向套、第二导向套和第三导向套的拆装比较方便，同时因螺纹具有自锁性，连接比较可靠。
7、第二丝杆、第三丝杆和第四丝杆的内壁上均设置有油槽，油槽沿丝杆的轴向设置，方便第二丝杆、第三丝杆和第四丝杆的加工，同时油槽可存储油脂，进而减小第一导向套与第二丝杆之间的摩擦力、第二导向套与第三丝杆之间的摩擦力、第三导向套与第四丝杆之间的摩擦力。
8、通过设置扭簧座和扭簧，扭簧座限制扭簧的轴向位置，在传动总成受力有收缩趋势时，扭簧限制第一丝杆的转动，起到自锁的作用，使得传动总成的使用更加可靠。
9、第四螺母通过铆接固定在第一管上，使得第四螺母无法周向转动，且铆 接工艺简单且连接可靠。
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升降立柱的结构示意图。
图2为本发明实施例一所述升降立柱的部分结构示意图。
图3为本发明实施例一所述升降立柱的剖视图。
图4为图3中A处的放大图。
图5为图3中B处的放大图。
图6为本发明实施例一所述升降立柱中第四丝杆与第四导向套的配合示意图。
图7为本发明实施例二所述升降立柱的结构示意图。
图8为本发明实施例二所述升降立柱的部分结构示意图。
图中所标各部件名称如下：
100、驱动装置；200、升降管；210、第一管；211、第四螺母；220、第二管；230、第三管；240、第四管；250、第五管；300、传动总成；310、第一丝杆；311、第一导向套；312、扭簧；313、扭簧座；320、第二丝杆；321、第一螺母；322、第二导向套；330、第三丝杆；331、第二螺母；332、第三导向套；340、第四丝杆；341、第三螺母；342、第四导向套；3421、开口；343、定位槽；400、第一滑块；500、第二滑块；600、第三滑块；700、第四滑块；800、下滑块；900、油槽。
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4所示，本发明提供一种低安装距的升降立柱，包括驱动装置100、升降管200及位于升降管200内部的传动总成300，升降管200包括由内向外依次套装的第一管210、第二管220、第三管230、第四管240和第五管250，通过将升降立柱设置成五节，可以减小每节升降管的安装距，使得安装距较低，第五管250的下端固定于驱动装置100上，驱动装置位于升降立柱的下端，第一管210的上端固定于升降平台上，升降立柱处于倒装状态，传动总成300包括由内向外依次套装的第一丝杆310、中空的第二丝杆320、中空的第三丝杆330和中空的第四丝杆340，驱动装置100的输出端与第一丝杆310传动配合且可驱动第一丝杆310旋转，第二丝杆320的下端设有与第一丝杆310螺纹传动连接的第一螺母321，第三丝杆330的下端设有与第二丝杆320螺纹传动连接的第二螺母331，第四丝杆340的下端设有与第三丝杆330螺纹传动连接的第三螺母341，第一管210的下端设有与第四丝杆340螺纹传动连接的第四螺母211，第一丝杆、第二丝杆、第三丝杆、第四丝杆和第一管之间通过螺纹传动连接，且螺母安装在相邻的丝杆上，位于相邻两个丝杆之间，无需另外设置固定螺母的装置，使得传动总成的轴向和径向都更加紧凑，进一步降低升降立柱的安装距，实现升降立柱的低安装距大行程。
如图5所示，本实施例中，第一丝杆310的上端设有限制第一螺母321轴向位置的第一导向套311，第一导向套311与第一丝杆310通过螺钉固定连接；第二丝杆320的上端设有限制第二螺母331轴向位置的第二导向套322，第二导 向套322与第二丝杆320通过螺钉固定连接；第三丝杆330的上端设有限制第三螺母341轴向位置的第三导向套332，第三导向套332与第三丝杆330通过螺钉固定连接；第四丝杆340的上端设有限制第四螺母211轴向位置的第四导向套342，结合图6，第四丝杆340的周向上设有定位槽343，通过在第四导向套342上设置开口3421，第四导向套通过开口径向压入定位槽内，使得第四导向套与第四丝杆的轴向位置固定，周向方向可自由转动，进而使得第四丝杆与第一管之间可以发生相对转动。
第一导向套311的外壁与第二丝杆320的内壁相配合，使得第一导向套311在第二丝杆320内移动时，传动比较平稳；第二导向套322的外壁与第三丝杆330的内壁相配合，使得第二导向套322在第三丝杆330内移动时，传动比较平稳；第三导向套332的外壁与第四丝杆340的内壁相配合，使得第三导向套332在第四丝杆340内移动时，传动比较平稳；升降管200均为方形管，可限制相邻升降管之间的转动，第四导向套342的外壁与第一管210的内壁相配合，因此第四导向套为方形导向套，使得第四导向套在第一管内移动时，传动比较平稳，进而使得整个升降过程中的传动都比较平稳。
该升降立柱的上升运行过程为：驱动装置100的输出端驱动第一丝杆310旋转，因第四螺母211固定在第一管210上无法旋转，而第一螺母321的螺纹螺旋升角最大，因此第一螺母321沿着第一丝杆310向上移动，并带动其余丝杆整体向上移动，此时第一导向套311在第二丝杆320内旋转且平移，保证整体移动的平稳；当第一螺母321与第一导向套311接触时，第一丝杆310的轴向移动停止，第二丝杆320跟随第一丝杆310旋转，此时，第二螺母331的螺旋升角在第二螺母331、第三螺母341和第四螺母211中最大，第二螺母331开始沿着第二丝杆320向上移动，此时第二导向套322在第三丝杆330内旋转且 平移，保证整体移动的平稳；当第二螺母331与第二导向套322接触时，第二丝杆320的轴向移动停止，第三丝杆330跟随第一丝杆310、第二丝杆320旋转，此时，第三螺母341的螺旋升角在第三螺母341和第四螺母211中最大，第三螺母341开始沿着第三丝杆330向上移动，此时第三导向套332在第四丝杆340内旋转且平移，保证整体运动的平稳；当第三螺母341与第三导向套332接触时，第三丝杆330的轴向移动停止，第四丝杆340跟随第一丝杆310、第二丝杆320、第三丝杆330旋转，此时，第四螺母211沿着第四丝杆340向上移动，第四导向套342在第一管210内平移，保证整体运动的平稳，当第四螺母211与第四导向套342接触时，传动总成的行程达到最大，第二丝杆320、第三丝杆330、第四丝杆340和第一管210向上移动时，带动第二管220、第三管230、第四管240和第五管250向上移动，实现升降立柱的上升。
同理，升降立柱下降时，第一丝杆310旋转，第一螺母321先沿着第一丝杆310向下移动，然后依次是第二螺母331沿着第二丝杆320向下移动、第三螺母341沿着第三丝杆330向下移动、第四螺母211沿着第四丝杆340向下移动，第二丝杆320、第三丝杆330、第四丝杆340和第一管210向下移动时，带动第二管220、第三管230、第四管240和第五管250向下移动，实现升降立柱的下降。
第一管210和第二管220之间设有第一滑块400，第一滑块400固定于第一管210的下端，第二管220与第三管230之间设有第二滑块500，第二滑块500固定于第二管220的下端，第三管230和第四管240之间设有第三滑块600，第三滑块600固定于第三管230的下端，第四管240与第五管250之间设有第四滑块700，第四滑块700固定于第四管240的下端，第二管220、第三管230、第四管240和第五管250的内壁上端均设置有静滑块，第二管的上限位通过第 二滑块与第三管内壁上的静滑块接触实现，第三管的上限位通过第三滑块与第四管内壁上的静滑块接触实现，第四管的上限位通过第四滑块与第五管内壁上的静滑块接触实现。
第五管250内壁的下端设有下滑块800，第二管220和第三管230的下限位通过第二管220和第三管230接触下滑块实现。
第二丝杆320、第三丝杆330和第四丝杆340的内壁上均设有油槽900，油槽900沿丝杆的轴向设置，油槽的设置方便第二丝杆、第三丝杆和第四丝杆的加工，同时油槽可存储油脂，进而减小第一导向套与第二丝杆之间的摩擦力、第二导向套与第三丝杆之间的摩擦力、第三导向套与第四丝杆之间的摩擦力。
第一丝杆310的下端套设有自锁装置，自锁装置包括扭簧座313和套设于扭簧座313上的扭簧312，扭簧座313限制扭簧312的轴向位置，在传动总成300受力有收缩趋势时，扭簧312限制第一丝杆310的转动，起到自锁的作用，使得传动总成的使用更加可靠。
第四螺母211与第一管210通过铆接固定，使得第四螺母无法周向转动，且铆接工艺简单且连接可靠。
实施例二：
本实施例与实施例一的主要区别在于，升降立柱处于正装状态。
如图7和图8所示，升降立柱处于正装状态下，驱动装置100固定于升降平台上，升降管200位于驱动装置100的下端，第一螺母321位于第二丝杆320的上端，第二螺母331位于第三丝杆330的上端，第三螺母341位于第四丝杆340的上端，第四螺母221位于第一管210的上端。
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. 一种低安装距的升降立柱，包括驱动装置、升降管及位于升降管内部的传动总成，其特征在于，所述升降管包括由内向外依次套装的第一管、第二管、第三管、第四管和第五管，第五管的下端固定于驱动装置上，传动总成包括由内向外依次套装的第一丝杆、中空的第二丝杆、中空的第三丝杆和中空的第四丝杆，驱动装置的输出端与第一丝杆传动配合且可驱动第一丝杆旋转，第二丝杆的下端设有与第一丝杆螺纹传动连接的第一螺母，第三丝杆的下端设有与第二丝杆螺纹传动连接的第二螺母，第四丝杆的下端设有与第三丝杆螺纹传动连接的第三螺母，第一管的下端设有与第四丝杆螺纹传动连接的第四螺母。
  2. 根据权利要求1所述的低安装距的升降立柱，其特征在于，所述第一丝杆的上端设有限制第一螺母轴向位置的第一导向套，第二丝杆的上端设有限制第二螺母轴向位置的第二导向套，第三丝杆的上端设有限制第三螺母轴向位置的第三导向套，第四丝杆的上端设有限制第四螺母轴向位置的第四导向套。
  3. 根据权利要求2所述的低安装距的升降立柱，其特征在于，所述第一导向套的外壁与第二丝杆的内壁相配合，第二导向套的外壁与第三丝杆的内壁相配合，第三导向套的外壁与第四丝杆的内壁相配合，第四导向套的外壁与第一管的内壁相配合。
  4. 根据权利要求2所述的低安装距的升降立柱，其特征在于，所述第四丝杆的周向上设有定位槽，第四导向套可转动地设于定位槽上。
  5. 根据权利要求4所述的低安装距的升降立柱，其特征在于，所述第四导向套上设有便于第四导向套径向压入定位槽的开口。
  6. 根据权利要求2所述的低安装距的升降立柱，其特征在于，所述第一导向套与第一丝杆通过螺钉固定连接，第二导向套与第二丝杆通过螺钉固定连接， 第三导向套与第三丝杆通过螺钉固定连接。
  7. 根据权利要求1所述的低安装距的升降立柱，其特征在于，所述第二丝杆、第三丝杆和第四丝杆的内壁上均设有油槽，油槽沿丝杆的轴向设置。
  8. 根据权利要求1所述的低安装距的升降立柱，其特征在于，所述第一丝杆的下端套设有自锁装置，自锁装置包括扭簧座和套设于扭簧座上的扭簧。
  9. 根据权利要求1-8任意一项所述的低安装距的升降立柱，其特征在于，所述第四螺母与第一管通过铆接固定。
  10. 根据权利要求1-8任意一项所述的低安装距的升降立柱，其特征在于，所述升降管均为方形管。
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