WO2019019228A1 - 伸缩梯子的自动适应管子形变的缓降机构 - Google Patents

伸缩梯子的自动适应管子形变的缓降机构 Download PDF

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Publication number
WO2019019228A1
WO2019019228A1 PCT/CN2017/097445 CN2017097445W WO2019019228A1 WO 2019019228 A1 WO2019019228 A1 WO 2019019228A1 CN 2017097445 W CN2017097445 W CN 2017097445W WO 2019019228 A1 WO2019019228 A1 WO 2019019228A1
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Prior art keywords
tube
disk
isolation bracket
telescopic ladder
pipe
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PCT/CN2017/097445
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English (en)
French (fr)
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潘跃进
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潘跃进
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Publication of WO2019019228A1 publication Critical patent/WO2019019228A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/02—Extending means

Definitions

  • the invention relates to a telescopic ladder, in particular to a descending mechanism of a telescopic ladder which is convenient to assemble, has a reliable structure and can automatically adapt to the roundness and straightness of the circular tube.
  • the telescopic ladder is a necessity for the climbing operation of the stretchable and retractable storage.
  • the telescopic ladder has a high requirement for the roundness and straightness of the ladder cylinder, and is slightly out of round. Or bending, it will seriously affect the effect of slowing down, or the effect of sealing due to the loss of roundness will result in rapid drop without slow down, or it will be stuck due to bending, resulting in a difficult situation, which seriously affects the stability of product quality during mass production.
  • Sex. I have tried a ladder in the market. According to the patent number displayed on the package, it is a slow-moving telescopic ladder using a rubber ring as a sealing ring, but the actual trial effect is far from the patent description.
  • the speed is very fast, and the impact of the decline is very large, and the purpose of reducing the security risk is not achieved at all.
  • the reason for the analysis is that the pipe used does not reach the desired size and the rubber ring will have a radial displacement during the descending process of the ladder and cannot always maintain the sealing effect.
  • the existing telescopic ladder technology requires high dimensional and dimensional accuracy of the circular tube.
  • the circular tube needs to be cold-drawn and straightened, but the product is greatly affected. Economic.
  • the slow-down effect of the tube is not suitable for the deformation of the tube, and the slow-down effect is poor.
  • the present invention provides a slow-down mechanism for automatically adapting the deformation of the tube to the telescopic ladder having a better descending effect.
  • a self-adapting tube deformation slow-down mechanism of a telescopic ladder includes a gas-discharging disk disposed at a lower end of the pipe, the air-closing disk being sealingly connected to an inner wall of the ladder-column pipe, and the air-closing disk is provided with an upper surface on the disk surface An exhausting hole; an isolation bracket is disposed under the air-disc, the isolation bracket is mounted at a lower end of the ladder column, and the isolation bracket is provided with a lower exhaust hole; and the lower end of the isolation bracket is disposed There is a piston ring that is in sealing connection with the inner wall of the adjacent lower tube.
  • the air-closing disk and the tube to which it is fitted are subjected to an interference fit.
  • a screw column is arranged at the center of the air-closing disk, and the screw column is inserted into the through hole at the center of the isolation bracket, and the air-closing disk is mounted on the isolation bracket by screws.
  • an upper portion of the isolation bracket is provided with a buckle hole, and the isolation bracket is mounted on the buckle provided at the lower end of the tube through the buckle hole.
  • the middle portion of the isolation bracket is provided with an upper stop disk having a diameter larger than an outer diameter of a smaller one of two adjacent tubes having a matching relationship with the smaller diameter of the larger tube. Small, thereby effectively isolating the two adjacent tubes; the lower portion of the isolation bracket is provided with a lower stop disk having a smaller diameter than the upper stop disk.
  • the upper surface of the piston ring is provided with a groove, and an opening is arranged in the radial direction, and the piston ring is installed between the upper port and the lower port of the isolation bracket.
  • the beneficial effects of the invention are mainly as follows: a slow-downing telescopic ladder capable of automatically adapting to the deformation of the pipe is provided, which reduces the processing difficulty and saves manpower and material cost under the premise of ensuring the product quality stability in mass production.
  • Figure 1 is a view showing the appearance of the contracted state and the extended state of the telescopic ladder, (a) is a collection Shrink state, (b) is stretched state;
  • Figure 2 is a three-dimensional exploded view of the slow-down mechanism that automatically adapts to the deformation of the pipe;
  • Figure 3 is a plan exploded view of the slow-down mechanism that automatically adapts to the deformation of the pipe;
  • Figure 4 is an assembled cross-sectional view of the slow-down mechanism that automatically adapts to the deformation of the tube.
  • a self-adapting tube deformation slow-down mechanism of a telescopic ladder includes a gas-discharging disk disposed at a lower end of the pipe, and the air-closing disk is sealingly connected with an inner wall of the ladder column pipe, the air-closing disk
  • An upper exhaust hole is disposed on the disk surface; an isolation bracket is disposed under the air lock plate, the isolation bracket is mounted on a lower end of the ladder column tube, and the isolation bracket is provided with a lower exhaust hole;
  • the lower end of the isolation bracket is provided with a piston ring, and the piston ring is sealingly connected to the inner wall of the adjacent lower tube.
  • a screw column is arranged at the center of the air-closing disk, and the screw column is inserted into the through hole at the center of the isolation bracket, and the air-closing disk is mounted on the isolation bracket by screws.
  • an upper portion of the isolation bracket is provided with a buckle hole, and the isolation bracket is mounted on the buckle provided at the lower end of the tube through the buckle hole.
  • the middle portion of the isolation bracket is provided with an upper stop disk having a diameter larger than an outer diameter of a smaller one of two adjacent tubes having a matching relationship with the smaller diameter of the larger tube. Small, thereby effectively isolating the two adjacent tubes; the lower portion of the isolation bracket is provided with a lower stop disk having a smaller diameter than the upper stop disk.
  • the upper surface of the piston ring is provided with a groove, and an opening is arranged in the radial direction, and the piston ring is installed between the upper port and the lower port of the isolation bracket.
  • the state diagram includes two longitudinally arranged ladder columns 1 and a plurality of laterally arranged steps 2, each of which is sleeved by a plurality of tubes 1(1) to 1(n) which are large to small.
  • the above is the conventional structure of the telescopic ladder.
  • 1(2) is the larger of the two adjacent tubes
  • 1(3) is the smaller of the two adjacent tubes, at the lower end of the tube 1 (3).
  • isolation bracket 2 which is fastened by a buckle hole 16 provided at an upper portion thereof to a buckle 17 provided at a lower portion of the pipe 1 (3), and the spacer bracket 2 is thus mounted and fixed to the pipe 1 (3). Lower end.
  • the middle portion of the isolation bracket 2 is provided with an upper end disk 6 having a diameter slightly larger than the outer diameter of the smaller tube 1 (3) of the two adjacent tubes having a matching relationship therewith.
  • the relatively large inner diameter of the tube 1 (2) is slightly smaller, so that the adjacent two tubes 1 (2) and 1 (3) are effectively isolated but axially movable, and mutual movement is avoided.
  • Contact friction; the center of the disk surface of the upper port 6 is provided with a through hole 8; and the disk surface of the upper port 6 is further provided with a vent hole 9.
  • the lower portion of the spacer bracket 2 is provided with a lower stop disk 7, and the diameter of the lower port plate 7 is smaller than the diameter of the upper port plate 6.
  • An air closing plate 3 is disposed in a lower portion of the tube 1 (3), and the air blocking plate 3 is provided with an interference fit with the tube 1 (3), and the air blocking surface of the air blocking plate 3 is provided with a vent hole 10,
  • the center of the air-closing disk 3 is provided with a raised screw column 11.
  • a piston ring 4 is mounted between the upper port 6 and the lower port 7 on the isolation bracket 2, and the upper surface of the piston ring 4 is provided with a recess 12 due to the presence of the recess 12.
  • the piston ring 4 is formed with a ring of elastic thin walls 13 which are elastic and can automatically adapt to the deformation of the tube 1 (2).
  • the inner lower part of the piston ring 4 is provided with a relying surface 14 which abuts against the lower stop disk 7 at the lower part of the spacer 2 so that the piston ring 4 encounters the deformed tube 1 (2)
  • the radial displacement is not generated, and the elastic elastic thin wall 13 can automatically adapt to the deformation while being in contact with the inner wall of the tube 1 (2) while maintaining the sealing performance when passing through the deformation of the tube 1 (2).
  • the piston ring 4 is provided with an opening 15 in the radial direction.
  • the opening 15 is arranged for convenient installation, and the upper opening plate 6 can be conveniently mounted on the isolation bracket 2 only by staggering the opening. Between the lower end plates 7, and after the insertion of the tube 1 (2), the opening 15 is closed, ensuring a tight seal between the piston ring 4 and the inner wall of the tube 1 (2).
  • the working process of the present invention is as follows: Referring to FIG. 4, a set of automatic adaptations of the isolation bracket 2, the air-disc 3, the piston ring 4 and the screw 5 are provided in the lower part of the pipe 1 (2) and the pipe 1 (3).
  • the slow-down mechanism of the deformation of the pipe when the pipe 1 (3) is lowered, since the air-closing disk 3 (1) and the piston ring 4 (2) are closely fitted to the inner wall of the pipe 1 (2), the pipe 1 ( 2)
  • the air between the inner closed air disc 3 (1) and the piston ring 4 (2) can only pass through the small exhaust hole 9 (1), the exhaust hole 10 (1) and the exhaust hole 9 (2), the row
  • the vent 10(2) is slowly discharged to achieve the purpose of slow descending; more importantly, the descending mechanism has a strong automatic adaptability due to the structural design, which is ideal not only when using a tube of an ideal shape and size.
  • the air-closing effect ensures the ideal air-closing effect when using a pipe with a certain tolerance.
  • the tubes produced by extrusion actually have a certain degree of shape tolerance (for example, radial out-of-round and axial linear deviation), but the descending mechanism can automatically adapt to this degree of shape tolerance, and can directly use the extrusion.
  • the pipe produced by the process can achieve the ideal slow-down effect, without additional cold drawing and straightening process to improve the shape and dimensional accuracy of the pipe, thereby greatly reducing the processing difficulty, saving manpower, material cost and improving The economics of the product and market competitiveness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

一种伸缩梯子的自动适应管子形变的缓降机构，包括一个设在管子内靠下端的闭气盘（3），闭气盘（3）与所在梯柱管子内壁密封连接，闭气盘（3）在盘面上设有一个上排气小孔（10）；在该闭气盘（3）下方设置有一个隔离支架（2），隔离支架（2）安装在梯柱管子的下端，隔离支架（2）上设有一个下排气小孔（9）；在隔离支架（2）的下端设有活塞环（4），活塞环（4）与相邻下方管子内壁密封连接。

Description

伸缩梯子的自动适应管子形变的缓降机构 技术领域
本发明涉及伸缩梯子，尤其是一种组装方便，结构可靠，能自动适应圆管正圆度和直线度的伸缩梯子的缓降机构。
背景技术
伸缩梯子是一种可伸展使用、可收缩存放的爬高作业的必需品，当前技术中的伸缩梯子，其缓降机构对梯柱圆管的正圆度和直线度要求很高，稍有失圆或弯曲，就严重影响缓降的效果，要么因为失圆而影响密封的效果导致没有缓降地快速掉落，要么就因为弯曲而卡住，导致上下两难，严重影响批量生产时产品质量的稳定性。本人在市场上曾试用过一款梯子，根据其包装物上显示的专利号查询出是一款使用橡胶圈作为密封圈的缓降伸缩梯，但实际试用效果却与专利描述效果甚远，下降速度很快，下降产生的冲击力很大，根本没有达到降低安全风险的目的。分析其原因就是因为使用的管子没有达到理想尺寸及其橡胶圈在梯子下降过程中会产生径向位移而不能做到始终保持密封的效果。
因此现有的伸缩梯子技术对圆管的形状尺寸精度要求很高，要想达到理想的缓降效果，就需要对圆管进行冷拔、矫直加工，但又较大程度地影响了产品的经济性。
发明内容
为了克服现有伸缩梯子的缓降方式无法适用于管子形变、缓降效果较差的不足，本发明提供一种具有较好缓降效果的伸缩梯子的自动适应管子形变的缓降机构。
本发明解决其技术问题所采用的技术方案是：
一种伸缩梯子的自动适应管子形变的缓降机构，包括一个设在管子内靠下端的闭气盘，所述闭气盘与所在梯柱管子内壁密封连接，所述闭气盘在盘面上设有一个上排气小孔；在该闭气盘下方设置有一个隔离支架，所述隔离支架安装在梯柱管子的下端，所述隔离支架上设有一个下排气小孔；在所述隔离支架的下端设有活塞环，所述活塞环与相邻下方管子内壁密封连接。
进一步，所述闭气盘与其配合的管子采用过盈配合。
更进一步，所述闭气盘中心处设有螺丝柱，所述螺丝柱插入设在隔离支架中心的通孔后，通过螺丝将闭气盘安装在隔离支架上。
再进一步，所述隔离支架的上部设有扣孔，所述隔离支架通过该扣孔安装在设在管子靠下端的扣位上。
优选的，所述隔离支架的中部设有上止口盘，该上止口盘的直径比与其有配合关系的两支相邻的管子中较小管子的外径大，比较大的管子的内径小，从而将该相邻的两支管子有效地隔离；所述隔离支架的下部设有下止口盘，所述下止口盘的直径比上止口盘的直径小。
更进一步，所述活塞环的上表面设有一条凹槽，在径向设有一个开口，所述活塞环安装在所述隔离支架的上止口盘与下止口盘之间。
本发明的有益效果主要表现为：提供了一款能自动适应管子形变的缓降伸缩梯，在保证了批量生产时产品质量稳定性的前提下，降低了加工难度，节约了人力、材料成本。
附图说明
图1为伸缩梯子的收缩状态和伸展状态的外观形态图，(a)是收 缩状态，(b)是伸展状态；
图2为本自动适应管子形变的缓降机构的三维爆炸图；
图3为本自动适应管子形变的缓降机构的平面爆炸图；
图4为本自动适应管子形变的缓降机构的组装剖视图。
具体实施方式
下面结合附图对本发明做进一步说明。
参照图1～图4，一种伸缩梯子的自动适应管子形变的缓降机构，包括一个设在管子内靠下端的闭气盘，所述闭气盘与所在梯柱管子内壁密封连接，所述闭气盘在盘面上设有一个上排气小孔；在该闭气盘下方设置有一个隔离支架，所述隔离支架安装在梯柱管子的下端，所述隔离支架上设有一个下排气小孔；在所述隔离支架的下端设有活塞环，所述活塞环与相邻下方管子内壁密封连接。
更进一步，所述闭气盘中心处设有螺丝柱，所述螺丝柱插入设在隔离支架中心的通孔后，通过螺丝将闭气盘安装在隔离支架上。
再进一步，所述隔离支架的上部设有扣孔，所述隔离支架通过该扣孔安装在设在管子靠下端的扣位上。
优选的，所述隔离支架的中部设有上止口盘，该上止口盘的直径比与其有配合关系的两支相邻的管子中较小管子的外径大，比较大的管子的内径小，从而将该相邻的两支管子有效地隔离；所述隔离支架的下部设有下止口盘，所述下止口盘的直径比上止口盘的直径小。
更进一步，所述活塞环的上表面设有一条凹槽，在径向设有一个开口，所述活塞环安装在所述隔离支架的上止口盘与下止口盘之间。
参照图1为本实施例的伸缩梯子的收缩状态和伸展状态的基本形 态图，包括左右对称的两根纵向设置的梯柱1，若干根横向设置的梯级2，每根梯柱1都由若干支由大到小的管子1(1)～1(n)套接而成；以上为伸缩梯子的常规结构。
参照图2和图3，1(2)为相邻两支管子中较大的管子，1(3)为相邻两支管子中较小的管子，在所述管子1(3)的下端设有隔离支架2，所述隔离支架2通过设在其上部的扣孔16扣在设在管子1(3)下部的扣位17上，所述隔离支架2从而安装固定在管子1(3)的下端。
所述隔离支架2的中部设有上止口盘6，所述上止口盘6的直径比与其有配合关系的两支相邻的管子中较小管子1(3)的外径略大，比较大的管子1(2)的内径略小，从而将该相邻的两支管子1(2)和1(3)有效地隔离但又可作轴向运动，而且避免了轴向运动时相互接触磨擦；所述上止口盘6的盘面中心设有通孔8；所述上止口盘6的盘面上还设有排气孔9。
所述隔离支架2的下部设有下止口盘7，下止口盘7的直径比上止口盘6的直径小。
在所述管子1(3)的下部内设有闭气盘3，所述闭气盘3与管子1(3)采用过盈配合，所述闭气盘3的盘面上设有排气孔10，所述闭气盘3的中心设有凸起的螺丝柱11，安装时，所述螺丝柱11插入设在隔离支架2中心的通孔8后，通过螺丝5将闭气盘安装在隔离支架2上。
在所述隔离支架2上的上止口盘6和下止口盘7之间安装有活塞环4，所述活塞环4的上表面设有一条凹槽12，正因有凹槽12的存在，致使活塞环4上形成了一圈有弹性的、能自动适应管子1(2)形变的弹性薄壁13。
所述活塞环4的内侧下部设有依靠面14，所述依靠面14紧靠在隔离支架2下部的下止口盘7上，从而使活塞环4在遇到形变的管子1(2)时，不会产生径向位移，而富有弹性的弹性薄壁13在通过管子1(2)形变处时，能自动适应形变的同时还能紧贴管子1(2)的内壁，保持密封性能。
所述活塞环4的径向设有一个开口15，所述开口15的设置是为了方便安装，只需将开口处错开一点就能很方便地安装于隔离支架2上的上止口盘6与下止口盘7之间，并且在装入管子1(2)后，所述开口15闭合，确保活塞环4与管子1(2)内壁的紧贴密封性。
本发明的工作过程为：参照图4，在管子1(2)和管子1(3)的下部都设有一套由隔离支架2、闭气盘3、活塞环4和螺丝5组合在一起的自动适应管子形变的缓降机构；当管子1(3)下降时，因闭气盘3(1)和活塞环4(2)都与管子1(2)的内壁紧密地贴合密封，所以在管子1(2)内闭气盘3(1)和活塞环4(2)之间的空气只能通过小的排气孔9(1)、排气孔10(1)和排气孔9(2)、排气孔10(2)缓慢排出，从而达到缓慢下降的目的；而更重要的是：本缓降机构因结构设计拥有很强的自动适应能力，不但在使用理想形状尺寸的管子时能达到理想的闭气效果，在使用一定程度公差的管子时，本缓降机构同样能保证理想的闭气效果。
众所周知，挤压生产出来的管子实际上都存在一定程度上形状公差(例如：径向失圆和轴向直线偏差)，但本缓降机构能自动适应此程度的形状公差，能直接使用挤压工艺生产出来的管子，即能达到理想的缓降效果，无需额外通过冷拔和矫直工艺来提高管子的形状尺寸精度，从而较大程度地降低了加工难度，节约了人力、材料成本，提高 了产品的经济性和市场竞争力。

Claims (6)

  1. 一种伸缩梯子的自动适应管子形变的缓降机构，其特征在于：包括一个设在管子内靠下端的闭气盘，所述闭气盘与所在梯柱管子内壁密封连接，所述闭气盘在盘面上设有一个上排气小孔；在该闭气盘下方设置有一个隔离支架，所述隔离支架安装在梯柱管子的下端，所述隔离支架上设有一个下排气小孔；在所述隔离支架的下端设有活塞环，所述活塞环与相邻下方管子内壁密封连接。
  2. 如权利要求1所述的伸缩梯子的自动适应管子形变的缓降机构，其特征在于：所述闭气盘与其配合的管子采用过盈配合。
  3. 如权利要求1或2所述的伸缩梯子的自动适应管子形变的缓降机构，其特征在于：所述闭气盘中心处设有螺丝柱，所述螺丝柱插入设在隔离支架中心的通孔后，通过螺丝将闭气盘安装在隔离支架上。
  4. 如权利要求1或2所述的伸缩梯子的自动适应管子形变的缓降机构，其特征在于：所述隔离支架的上部设有扣孔，所述隔离支架通过该扣孔安装在设在管子靠下端的扣位上。
  5. 如权利要求4所述的伸缩梯子的自动适应管子形变的缓降机构，其特征在于：所述隔离支架的中部设有上止口盘，该上止口盘的直径比与其有配合关系的两支相邻的管子中较小管子的外径大，比较大的管子的内径小，从而将该相邻的两支管子有效地隔离；所述隔离支架的下部设有下止口盘，所述下止口盘的直径比上止口盘的直径小。
  6. 如权利要求1或2所述的伸缩梯子的自动适应管子形变的缓降机构，其特征在于：所述活塞环的上表面设有一条凹槽，在径向设有一个开口，所述活塞环安装在所述隔离支架的上止口盘与下止口盘之间。
PCT/CN2017/097445 2017-07-27 2017-08-15 伸缩梯子的自动适应管子形变的缓降机构 WO2019019228A1 (zh)

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