WO2020147174A1 - 一种可延长使用寿命的双蜗杆自消隙结构 - Google Patents

一种可延长使用寿命的双蜗杆自消隙结构 Download PDF

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Publication number
WO2020147174A1
WO2020147174A1 PCT/CN2019/077072 CN2019077072W WO2020147174A1 WO 2020147174 A1 WO2020147174 A1 WO 2020147174A1 CN 2019077072 W CN2019077072 W CN 2019077072W WO 2020147174 A1 WO2020147174 A1 WO 2020147174A1
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Prior art keywords
worm
movable
fixed
service life
backlash
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PCT/CN2019/077072
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English (en)
French (fr)
Inventor
高强
程振涛
汤秀清
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广州市昊志机电股份有限公司
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Publication of WO2020147174A1 publication Critical patent/WO2020147174A1/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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F16H55/24—Special devices for taking up backlash
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/039—Gearboxes for accommodating worm gears

Definitions

  • the invention relates to a worm, in particular to a double worm self-anti-backlash structure which can prolong the service life.
  • the purpose of the present invention is to provide a double worm self-anti-backlash structure that can compensate for the wear of the worm wheel and worm in real time, can realize high-precision rotation, and does not require manual adjustment of the worm wheel and worm, and has a long service life.
  • a double worm self-anti-backlash structure that can prolong the service life includes a fixed worm, a movable worm, an elastic structure and a cylinder structure.
  • the movable worm and the fixed worm rotate coaxially, and the movable worm and the fixed worm circumference
  • the elastic structure is installed between the fixed worm and the movable worm to provide a force away from each other between the fixed worm and the movable worm.
  • the cylinder structure includes a cylinder
  • the fixed worm is in contact with the tooth surface of the worm gear, and the cylinder is ventilated to make the piston bear against the movable worm, eliminating the force of the elastic structure,
  • the movable worm is contacted and disconnected from the worm wheel; when the worm is reversed, the cylinder body is cut off, and the movable worm is in contact with the tooth surface of the worm wheel under the force of the elastic structure to drive the worm wheel to rotate.
  • the cylinder structure further includes a second elastic member installed between the cylinder and the piston, so that the piston is reset when the cylinder is out of air.
  • the second elastic member is a spring.
  • the double-worm self-anti-backlash structure with prolonged service life further includes a compression cover that is housed in the movable worm and is fixedly connected to the movable worm, and the compression cover is located in the One side of elastic structure.
  • the movable worm and the fixed worm are connected by a spline.
  • the elastic structure includes a first elastic member, and two ends of the first elastic member respectively abut the movable worm and the fixed worm.
  • the first elastic member is a disc spring or a spring.
  • the elastic structure further includes an adjusting washer located between the first elastic member and the fixed worm.
  • the double worm self-anti-backlash structure that can prolong the service life further includes a support structure and a box body.
  • the support structure includes a first bearing and a bearing seat.
  • the first bearing supports the fixed worm and passes through the
  • the bearing seat is installed on the box, and the cylinder is fixedly installed on the box.
  • the movable worm and the fixed worm of the double worm self-anti-backlash structure of the present invention can prolong the service life and rotate coaxially.
  • the movable worm and the fixed worm are circumferentially fixed and axially movable relative to each other, and the elastic structure is installed on the fixed worm.
  • the fixed worm and the movable worm are provided with a force away from each other with the movable worm.
  • the cylinder structure includes a cylinder and a piston installed in the cylinder. When the worm rotates forward, the fixed worm and the worm gear are in contact with the tooth surface, and the cylinder is ventilated.
  • the piston resists the movable worm and eliminates the force of the elastic structure to disconnect the movable worm from the worm wheel; when the worm reverses, the cylinder block is cut off, and the movable worm contacts the worm gear tooth surface under the force of the elastic structure to drive the worm wheel to rotate;
  • the above design ensures that the worm wheel and the worm will not be affected by the backlash regardless of the forward and reverse rotation.
  • the movable worm does not contact the tooth surface of the worm wheel, reducing wear and extending the service life of the worm wheel.
  • Fig. 1 is a schematic structural view of a double worm self-anti-backlash structure that can extend the service life of the present invention
  • Figure 2 is a cross-sectional view of the double worm self-anti-backlash structure A-A that can extend the service life of Figure 1;
  • Fig. 3 is a perspective view of the working state of the double worm self-anti-backlash structure with extended service life of Fig. 1;
  • Fig. 4 is an enlarged view of B of the double worm self-anti-backlash structure with prolonged service life of Fig. 3;
  • Fig. 5 is a structural schematic diagram of the worm rotating forward of the double worm self-anti-backlash structure of Fig. 4 which can extend the service life;
  • Fig. 6 is a schematic structural diagram of the worm reversal of the double worm self-anti-backlash structure of Fig. 4 which can extend the service life.
  • a component when referred to as being "fixed to” another component, it can be directly on the other component or a central component may also exist.
  • a component When a component is considered to be “connected” to another component, it can be directly connected to another component or there may be a centered component at the same time.
  • a component When a component is considered to be “set on” another component, it may be set directly on another component or there may be a centered component at the same time.
  • the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only.
  • Figures 1 to 6 is a double worm self-anti-backlash structure of the present invention that can extend the service life, including a worm wheel 1, a fixed worm 2, a movable worm 3, an elastic structure 4, a compression cover 5, and an input gear assembly 6 , Bearing lock nut 7, supporting structure 8, box body 9 and cylinder structure 10.
  • the fixed worm 2 is partially housed in the movable worm 3 and the movable worm 3 is fixed in the circumferential direction by a spline, and can move in the axial direction. At this time, the fixed worm 2 and the movable worm 3 are coaxial.
  • the worm wheel 1 meshes with the fixed worm 2 and the movable worm 3 at the same time.
  • the elastic structure 4 includes an adjusting pad 41 and a first elastic member 42.
  • the adjusting washer 41 and the first elastic member 42 are located inside the movable worm 3 and in the recess of the fixed worm 2.
  • the adjusting washer 41 is located between the side wall of the fixed worm 2 and the first elastic member 42.
  • the first elastic member 42 is a spring or a disc spring.
  • the first elastic member 42 is a disc spring.
  • the compression cover 5 and the movable worm 3 are fixed by screwing to prevent loosening.
  • the input gear assembly 6 is fixed at the end of the movable worm 3 and is used for torque input connection of the servo motor.
  • the supporting structure 8 includes a first bearing 81, a bearing seat 82 and a second bearing 83.
  • the first bearing 81 is a tapered roller bearing, which is used to support the fixed worm 2 so that the fixed worm 2 can only rotate and cannot move axially.
  • the first bearing 81 is mounted to the case 9 through a bearing seat 82.
  • the second bearing 83 is a needle bearing for supporting the movable worm 3, and the second bearing 83 is installed on the box 9.
  • the bearing lock nut 7 is fixed to the end of the fixed worm 2 to lock the first bearing 81.
  • the cylinder structure 10 includes a piston 11, a second elastic member 12 and a cylinder 13.
  • the cylinder 13 is fixed to the box 9 by bolts, and the piston 11 is movably accommodated in the cylinder 13.
  • the second elastic member 12 is a spring and is installed in the cylinder 13, and two ends of the second elastic member 12 respectively abut against the piston 11 and the cylinder 13.
  • the piston 11 can abut against the pressing cover 5.
  • the cylinder 13 is provided with a ventilation joint.
  • the fixed worm 2 and the movable worm 3 are limited by the spline connection and can only move relative to each other.
  • the elastic structure forces the fixed worm 2 and the movable worm 3 to generate a force away from each other .
  • Both the fixed worm 2 and the movable worm 3 can contact the tooth surface of the worm wheel 1.
  • the fixed worm 2 and the movable worm 3 rotate forward, the fixed worm 2 contacts the left tooth surface of the worm wheel 1.
  • the cylinder 13 is ventilated through the vent joint, and the piston 11 presses the cover 5 against the movable worm 3 to offset the force of the elastic mechanism.
  • the movable worm 3 does not contact the tooth surface of the worm wheel 1, and the second elastic member 12 is in Compressed state; when the fixed worm 2 and the movable worm 3 are reversed, the cylinder 13 is cut off, the second elastic member 12 resets the piston 11, and the movable worm 3 contacts the right tooth surface of the worm wheel 1 under the force of the elastic mechanism.
  • the movable worm 3 drives the worm wheel 1 to rotate.
  • the movable worm 3 does not contact the tooth surface of the worm wheel 1, thereby reducing wear and extending the service life of the worm wheel 1, the fixed worm 2 and the movable worm 3.
  • the spring force of the disc spring is set to F, and the distance between the point of action of the worm wheel 1 and the worm is L from the center of rotation of the worm wheel 1, and it can be estimated that the worm wheel 1 is subjected to external torque within M ⁇ F*L. There is no backlash during rotation, and it can rotate with high precision.
  • the cylinder structure 10 makes the fixed worm 2 and the movable worm 3 rotate forward, the movable worm 3 does not contact the tooth surface of the worm wheel 1, and the wear of the worm wheel 1 and the worm wheel is avoided.
  • the worm wheel 1 and the worm will heat and expand during use. Because of the zero backlash, the worm wheel 1 and the worm structure of the rotary system will be stuck. Due to the existence of the elastic structure 4, the movable worm 3 can be moved after thermal expansion. Rebound to allow the position without jamming problems, a good solution to this problem.
  • the worm wheel 1 and the worm will wear out during use. At this time, the elastic structure 4 can self-compensate to compensate for the backlash.
  • the dual worm self-anti-backlash structure that can prolong the service life of the application solves the problem of backlash between the worm wheel 1 and the worm, and can make the worm pair structure work under zero backlash conditions and rotate with high precision; reduce the processing difficulty of the worm pair, Ordinary worm wheel 1 and worm are enough, and do not need to be a double-lead worm; the cylinder structure 10 makes the fixed worm 2 and the movable worm 3 rotate forward, the movable worm 3 does not contact the tooth surface of the worm wheel 1, avoiding the worm wheel 1. The wear and tear with the worm greatly increases the service life of the double worm self-anti-backlash structure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Gears, Cams (AREA)

Abstract

一种可延长使用寿命的双蜗杆自消隙结构，包括固定蜗杆（2）、活动蜗杆（3）、弹性结构（4）及气缸结构（10），活动蜗杆（3）与固定蜗杆（2）同轴转动，且两者周向固定并可轴向相对移动，弹性结构（4）安装于固定蜗杆（2）与活动蜗杆（3）之间，以给两者提供相互远离的力，气缸结构（10）包括缸体（13）及安装于缸体（13）内的活塞（11），蜗杆正转时，固定蜗杆（2）与蜗轮（1）齿面接触，缸体（13）通气，使活塞（11）顶住活动蜗杆（3），消除弹性结构（4）的作用力，使活动蜗杆（3）与蜗轮（1）接触断开；蜗杆反转时，缸体（13）断气，活动蜗杆（3）在弹性结构（4）的作用力下与蜗轮（1）齿面接触，带动蜗轮（1）转动，通过上述设计，确保蜗轮（1）与蜗杆不管正反转动，都不会受背隙的影响，蜗杆正转时，活动蜗杆（3）与蜗轮（1）的齿面不接触，降低磨损，延长蜗轮蜗杆的使用寿命。

Description

一种可延长使用寿命的双蜗杆自消隙结构 技术领域
本发明涉及蜗杆，尤其是涉及一种可延长使用寿命的双蜗杆自消隙结构。
背景技术
近年来，随着装备制造技术的发展，对伺服驱动设备提出精密、零背隙转动的要求。而在机床的应用中，常用的蜗轮蜗杆转动因齿隙的存在，反向运动会导致转动失效，从而降低转动的精度并对稳定性造成影响。目前主流的双导程蜗杆虽然可以短时减小背隙，但要求隔一段时间在蜗轮蜗杆磨损后人为重新调整，非常麻烦，并且使用寿命也短，需要经常更换和维修。
发明内容
为了克服现有技术的不足，本发明的目的在于提供一种可以实时补偿蜗轮蜗杆的磨损；可以实现高精度转动，而且不需要人为周期调整蜗轮蜗杆、使用寿命长的双蜗杆自消隙结构。
本发明的目的采用以下技术方案实现：
一种可延长使用寿命的双蜗杆自消隙结构，包括固定蜗杆、活动蜗杆、弹性结构及气缸结构，所述活动蜗杆与所述固定蜗杆同轴转动，所述活动蜗杆与所述固定蜗杆周向固定并轴向可相对移动，所述弹性结构安装于所述固定蜗杆与所述活动蜗杆之间给所述固定蜗杆及所 述活动蜗杆之间提供相互远离的力，所述气缸结构包括缸体及安装于缸体内的活塞，蜗杆正转时，所述固定蜗杆与蜗轮齿面接触，所述缸体通气使所述活塞顶住所述活动蜗杆，消除所述弹性结构的作用力，使所述活动蜗杆与蜗轮接触断开；蜗杆反转时，所述缸体断气，所述活动蜗杆在所述弹性结构的作用力下与所述蜗轮齿面接触带动蜗轮转动。
进一步地，所述气缸结构还包括第二弹性件，所述第二弹性件安装于所述缸体与所述活塞之间，使所述活塞在所述缸体断气时复位。
进一步地，所述第二弹性件为弹簧。
进一步地，所述可延长使用寿命的双蜗杆自消隙结构还包括压紧盖，所述压紧盖收容于所述活动蜗杆并与所述活动蜗杆固定连接，所述压紧盖位于所述弹性结构一侧。
进一步地，所述活塞与所述压紧盖抵触。
进一步地，所述活动蜗杆与所述固定蜗杆之间通过花键连接。
进一步地，所述弹性结构包括第一弹性件，所述第一弹性件两端分别与所述活动蜗杆及所述固定蜗杆抵触。
进一步地，所述第一弹性件为碟簧或弹簧。
进一步地，所述弹性结构还包括调节垫片，所述调节垫片位于所述第一弹性件与所述固定蜗杆之间。
进一步地，所述可延长使用寿命的双蜗杆自消隙结构还包括支撑结构及箱体，所述支撑结构包括第一轴承及轴承座，所述第一轴承支撑所述固定蜗杆并通过所述轴承座安装于所述箱体，所述缸体固定安 装于所述箱体。
相比现有技术，本发明可延长使用寿命的双蜗杆自消隙结构的活动蜗杆与固定蜗杆同轴转动，活动蜗杆与固定蜗杆周向固定并轴向可相对移动，弹性结构安装于固定蜗杆与活动蜗杆之间给固定蜗杆及活动蜗杆之间提供相互远离的力，气缸结构包括缸体及安装于缸体内的活塞，蜗杆正转时，固定蜗杆与蜗轮齿面接触，缸体通气使活塞顶住活动蜗杆，消除弹性结构的作用力，使活动蜗杆与蜗轮接触断开；蜗杆反转时，缸体断气，活动蜗杆在弹性结构的作用力下与蜗轮齿面接触带动蜗轮转动；通过上述设计，确保蜗轮与蜗杆不管正反转动，都不会受背隙的影响。而且，蜗杆正转时，活动蜗杆与蜗轮的齿面不接触，降低磨损，延长蜗轮蜗杆的使用寿命。
附图说明
图1为本发明可延长使用寿命的双蜗杆自消隙结构的一结构示意图；
图2为图1的可延长使用寿命的双蜗杆自消隙结构A-A处的剖视图；
图3为图1的可延长使用寿命的双蜗杆自消隙结构的工作状态立体图；
图4为图3的可延长使用寿命的双蜗杆自消隙结构的B处的放大图；
图5为图4的可延长使用寿命的双蜗杆自消隙结构的蜗杆正转的 结构示意图；
图6为图4的可延长使用寿命的双蜗杆自消隙结构的蜗杆反转的结构示意图。
图中：1、蜗轮；2、固定蜗杆；3、活动蜗杆；4、弹性结构；41、调节垫片；42、第一弹性件；5、压紧盖；6、输入齿轮组件；7、轴承锁紧螺母；8、支撑结构；81、第一轴承；82、轴承座；83、第二轴承；9、箱体；10、气缸结构；11、活塞；12、第二弹性件；13、缸体。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，当组件被称为“固定于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1至图6，为本发明一种可延长使用寿命的双蜗杆自消隙结构，包括蜗轮1、固定蜗杆2、活动蜗杆3、弹性结构4、压紧盖5、输入齿轮组件6、轴承锁紧螺母7、支撑结构8、箱体9及气缸结构10。
固定蜗杆2部分收容于活动蜗杆3与活动蜗杆3通过花键周向固定，并且在轴向上能够移动。此时固定蜗杆2与活动蜗杆3同轴。蜗轮1同时与固定蜗杆2及活动蜗杆3啮合。在本实施例中，弹性结构4包括调节垫片41及第一弹性件42。调节垫片41及第一弹性件42位于活动蜗杆3内部并位于固定蜗杆2的凹陷处。调节垫片41位于固定蜗杆2的侧壁及第一弹性件42之间。第一弹性件42为弹簧或碟簧。在本实施例中，第一弹性件42为碟簧。压紧盖5与活动蜗杆3通过螺纹配合固定，防止松动。输入齿轮组件6固定于活动蜗杆3的末端，用于伺服电机的扭矩输入连接。
支撑结构8包括第一轴承81、轴承座82及第二轴承83。第一轴承81为圆锥滚子轴承，用于支撑固定蜗杆2使固定蜗杆2只能旋转，不能轴向窜动。第一轴承81通过轴承座82安装于箱体9。第二轴承83为滚针轴承，用于支撑活动蜗杆3，第二轴承83安装于箱体9。 轴承锁紧螺母7固定于固定蜗杆2的端部锁紧第一轴承81。
气缸结构10包括活塞11、第二弹性件12及缸体13。缸体13通过螺栓固定于箱体9，活塞11活动收容于缸体13。第二弹性件12为弹簧并安装于缸体13内，第二弹性件12两端分别与活塞11及缸体13抵触。活塞11能够抵触压紧盖5。缸体13上设有通气接头。
使用可延长使用寿命的双蜗杆自消隙结构时，固定蜗杆2和活动蜗杆3通过花键联接限位，只能轴向相对移动，弹性结构迫使固定蜗杆2和活动蜗杆3产生相互远离的力。使得固定蜗杆2和活动蜗杆3均能接触蜗轮1的齿面。当固定蜗杆2和活动蜗杆3正转时，固定蜗杆2与蜗轮1左齿面接触。此时缸体13通过通气接头通气，活塞11通过压紧盖5顶住活动蜗杆3，将弹性机构的力抵消，活动蜗杆3与蜗轮1的齿面不接触，此时第二弹性件12处于压缩状态；当固定蜗杆2和活动蜗杆3反转时，缸体13断气，第二弹性件12使活塞11复位，活动蜗杆3在弹性机构的力的作用下与蜗轮1的右齿面接触，活动蜗杆3带动蜗轮1转动，通过上述设计，确保蜗轮1与固定蜗杆2及活动蜗杆3不管正反转动，都不会受背隙的影响，精度不衰减，精度高。而且，固定蜗杆2和活动蜗杆3正转时，活动蜗杆3与蜗轮1的齿面不接触，降低磨损，延长蜗轮1、固定蜗杆2和活动蜗杆3的使用寿命。
此处设碟簧弹力为F，蜗轮1与蜗杆的作用点离蜗轮1旋转中心距离为L，可以估算蜗轮1受外界作用扭矩在M≤F*L内，此蜗杆副结构不管正转还是反转，都不存在背隙，可以很高精度地转动。当蜗 轮1受外界扭矩M＞F*L时候，此蜗杆副结构正转时候不存在背隙，反转时候会出现背隙，但当反转停止后，活动蜗杆3在弹性结构4作用下又会消除掉背隙，即将蜗轮1转动到理论的位置，不受背隙影响；即当蜗轮1受外界扭矩M＞F*L时候，联动精度会因背隙产生而受损失，但点动定位精度还是不受背隙影响可以非常高。此处碟簧力F可以根据需要设定，F越大，正反转没背隙的力矩M越大；但相应的，蜗轮1与蜗杆的磨损会加快。气缸结构10则使固定蜗杆2和活动蜗杆3正转时，活动蜗杆3与蜗轮1的齿面不接触，避免了蜗轮1与蜗杆的磨损。
蜗轮1与蜗杆使用过程中会发热膨胀，因为零背隙的原因，转统的蜗轮1与蜗杆结构就会发生卡死的问题，而这里由于弹性结构4的存在，在热膨胀后活动蜗杆3可以回弹让位置而不会产生卡死问题，很好地解决了这个问题。
蜗轮1与蜗杆使用过程中会发生磨损，这时候弹性结构4可以自补偿，将背隙补偿掉。
本申请中可延长使用寿命的双蜗杆自消隙结构解决了蜗轮1与蜗杆背隙问题，可以使蜗杆副结构在零背隙工况下工作，高精度转动；降低了蜗杆副的加工难度，普通蜗轮1与蜗杆即可，不需要做成双导程的蜗杆；气缸结构10则使固定蜗杆2和活动蜗杆3正转时，活动蜗杆3与蜗轮1的齿面不接触，避免了蜗轮1与蜗杆的磨损，大幅度提高了双蜗杆自消隙结构的使用寿命。
以上，所有的实施方式仅为本发明的优选实施方式而已，并非对 本发明作任何形式上的限制；凡本行业的普通技术人员均可按说明书附图所示和以上而顺畅地实施本发明；但是，凡熟悉本专业的技术人员在不脱离本发明技术方案范围内，利用以上所揭示的技术内容而做出的些许更动、修饰与演变的等同变化，均为本发明的等效实施例；同时，凡依据本发明的实质技术对以上实施例所作的任何等同变化的更动、修饰与演变等，均仍属于本发明的技术方案的保护范围之内。

Claims (10)

  1. 一种可延长使用寿命的双蜗杆自消隙结构，包括固定蜗杆，其特征在于：还包括活动蜗杆、弹性结构及气缸结构，所述活动蜗杆与所述固定蜗杆同轴转动，所述活动蜗杆与所述固定蜗杆周向固定并轴向可相对移动，所述弹性结构安装于所述固定蜗杆与所述活动蜗杆之间给所述固定蜗杆及所述活动蜗杆之间提供相互远离的力，所述气缸结构包括缸体及安装于缸体内的活塞，蜗杆正转时，所述固定蜗杆与蜗轮齿面接触，所述缸体通气使所述活塞顶住所述活动蜗杆，消除所述弹性结构的作用力，使所述活动蜗杆与蜗轮接触断开；蜗杆反转时，所述缸体断气，所述活动蜗杆在所述弹性结构的作用力下与所述蜗轮齿面接触带动蜗轮转动。
  2. 根据权利要求1所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述气缸结构还包括第二弹性件，所述第二弹性件安装于所述缸体与所述活塞之间，使所述活塞在所述缸体断气时复位。
  3. 根据权利要求2所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述第二弹性件为弹簧。
  4. 根据权利要求1所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述可延长使用寿命的双蜗杆自消隙结构还包括压紧盖，所述压紧盖收容于所述活动蜗杆并与所述活动蜗杆固定连接，所述压紧盖位于所述弹性结构一侧。
  5. 根据权利要求4所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述活塞与所述压紧盖抵触。
  6. 根据权利要求1所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述活动蜗杆与所述固定蜗杆之间通过花键连接。
  7. 根据权利要求1所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述弹性结构包括第一弹性件，所述第一弹性件两端分别与所述活动蜗杆及所述固定蜗杆抵触。
  8. 根据权利要求7所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述第一弹性件为碟簧或弹簧。
  9. 根据权利要求7所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述弹性结构还包括调节垫片，所述调节垫片位于所述第一弹性件与所述固定蜗杆之间。
  10. 根据权利要求1所述的可延长使用寿命的双蜗杆自消隙结构，其特征在于：所述可延长使用寿命的双蜗杆自消隙结构还包括支撑结构及箱体，所述支撑结构包括第一轴承及轴承座，所述第一轴承支撑所述固定蜗杆并通过所述轴承座安装于所述箱体，所述缸体固定安装于所述箱体。
PCT/CN2019/077072 2019-01-17 2019-03-06 一种可延长使用寿命的双蜗杆自消隙结构 WO2020147174A1 (zh)

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