CN111022557B - 机床用弹簧结构 - Google Patents

机床用弹簧结构 Download PDF

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CN111022557B
CN111022557B CN201911231058.6A CN201911231058A CN111022557B CN 111022557 B CN111022557 B CN 111022557B CN 201911231058 A CN201911231058 A CN 201911231058A CN 111022557 B CN111022557 B CN 111022557B
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inflator
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CN111022557A (zh
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陈武夷
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Hangzhou Lanerbin Intelligent Equipment Co ltd
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Hangzhou Fuyang Hexiang Mould Co ltd
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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0218—Mono-tubular units
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
    • F16F9/435—Filling or drainage arrangements, e.g. for supply of gas via opening in cylinder wall
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
    • F16F9/437—Drainage arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements

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Abstract

本发明提供了一种机床用弹簧结构，属于机械技术领域。本机床用弹簧结构包括上板、下板以及设于上板和下板之间的压缩弹簧，压缩弹簧有两根，两压缩弹簧之间设有气筒，气筒下端与下板固连，气筒内设有连杆，连杆上端与上板固连，连杆下端侧壁与气筒内壁之间形成密封；气筒下端内壁上成型有环形挡肩，环形挡肩将气筒内腔分成上腔和下腔，上腔内设有密封板，密封板外径小于上腔内径，密封板与气筒滑动连接，密封板抵在环形挡肩上并封闭环形挡肩上端口，下腔内设有使密封板具有向上移动趋势并开启环形挡肩上端口的伸缩弹簧，气筒侧壁上贯穿设有与上腔连通的气孔，气筒外固定有与气孔连通的气嘴，下板上贯穿设有与下腔连通的排气孔。本发明精度较高。

Description

机床用弹簧结构
技术领域
本发明属于机械技术领域，涉及一种机床附件，特别是一种机床用弹簧结构。
背景技术
弹簧是一种利用弹性来工作的机械零件，用弹性材料制成的零件在外力作用下发生形变，除去外力后又恢复原状。
现有的弹簧如中国专利库公开的一种压缩弹簧【申请号：201620912062.4】包括弹簧本体，弹簧本体的两端面设置有端面固定面板，弹簧本体为一对圆柱空心螺旋体，固定面板为带有固定弹簧本体两个螺旋体的卡扣的圆饼面板，卡扣沿平行于弹簧本体中心轴方向设置于弹簧本体外侧。
上述的压缩弹簧通过两弹簧本体实现缓冲功效，但由于两弹簧本体的缓冲范围是固定不变的，导致其缓冲精度不佳，无法满足高精度工况下的需求。
发明内容
本发明的目的是针对现有的技术存在上述问题，提出了一种机床用弹簧结构，解决的技术问题是如何提高缓冲精度。
本发明的目的可通过下列技术方案来实现：机床用弹簧结构，包括上板、下板以及竖直设于上板和下板之间的压缩弹簧，压缩弹簧有两根且位置并列设置，其特征在于，两所述的压缩弹簧之间竖直设有气筒，且气筒的下端与下板固连，气筒内竖直设有连杆，连杆的上端伸出气筒并与上板固连，连杆的下端侧壁与气筒的内壁之间形成密封；所述的气筒的下端内壁上一体成型有环形挡肩，且环形挡肩将气筒的内腔分成上腔和下腔，上腔内水平设有密封板，且密封板外径小于上腔内径，密封板与气筒滑动连接，密封板抵压在环形挡肩上并封闭环形挡肩的上端口，下腔内设有使密封板具有向上移动趋势并开启环形挡肩上端口的伸缩弹簧，所述的气筒的侧壁上贯穿设有与上腔连通的气孔，且气筒外固定有与气孔连通的气嘴，下板上贯穿设有与下腔连通的排气孔。
使用过程如下：初始状态时，密封板在伸缩弹簧作用下上移打开环形挡肩上端口；使用时，通过气嘴往上腔内灌入压缩气体，密封板在气压作用下克服伸缩弹簧弹力逐渐下移直至封闭环形挡肩上端口，当上腔内的气压到达设定值时停止供气；工作时，上板受外力作用同时克服两压缩弹簧的弹力以及压缩气体的压力下移实现缓冲；当气筒内的压缩气体不承担缓冲作用时，通过气嘴排出气筒内的压缩气体，此时，密封板在伸缩弹簧作用下上移重新打开环形挡肩上端口，使连杆的滑动不受阻。
在上述的机床用弹簧结构中，所述的连杆的外侧壁和圆筒的内侧壁为相互匹配的圆柱面且两者贴靠在一起，以确保连杆滑动的顺畅性和稳定性。
在上述的机床用弹簧结构中，所述的连杆的外侧壁上开设有环形凹槽，环形凹槽内设有密封圈，且密封圈的外侧壁与圆筒的内侧壁相抵，使连杆和圆筒之间形成可靠密封。
在上述的机床用弹簧结构中，所述的密封板的底壁上开设有呈环状的定位槽，定位槽内固定有环形密封垫，环形密封垫顶壁与定位槽底壁相抵，当密封板紧压在环形挡肩上时，环形密封垫底壁能紧压在环形挡肩顶壁上，以加强将环形挡肩上端口封闭的效果。
在上述的机床用弹簧结构中，所述的下板的顶壁上垂直固定有导柱，导柱外套有导管，导管上端穿过环形挡肩并与密封板固连，伸缩弹簧套设在导管外，且伸缩弹簧的两端分别与密封板和下板相抵。
在上述的机床用弹簧结构中，所述的气孔呈条状并倾斜设置，气孔的上端口和下端口分别位于气筒的外侧壁和内侧壁上，且气孔的下端口正对密封板顶壁，使密封板更易克服伸缩弹簧弹力下移，来提高操作效率和方便性。
在上述的机床用弹簧结构中，所述的气筒的外侧壁上一体成型有呈管状的进气部，气孔的上端口与进气部连通，气嘴包括呈管状的出气部，且出气部螺纹连接在进气部内。
与现有技术相比，本机床用弹簧结构具有以下优点：
1、设置由气筒、密封板、伸缩弹簧、气嘴、排气孔等部件组成的缓冲组件，可通过改变气筒内气压来精准改变整个弹簧结构的缓冲效果，这样不仅可以提高缓冲精度，还可以使本弹簧结构能够满足于不同的工况，以提高实用性。
2、连杆既起到压缩气筒内的压缩气体来实现缓冲效果，又对整个缓冲行程起较好的缓冲效果，具备一物两用的效果，结构简单、安装方便。
附图说明
图1是气腔内存有压缩气体时本机床用弹簧结构的示意图。
图2是图1中A处的放大结构示意图。
图3是气腔内未存有压缩气体时本机床用弹簧结构的示意图。
图中，1、上板；2、下板；2a、排气孔；3、压缩弹簧；4、气筒；4a、环形挡肩；4b、上腔；4c、下腔；4d、气孔；4e、进气部；5、连杆；6、密封圈；7、密封板；8、伸缩弹簧；9、导柱；10、导套；11、环形密封垫；12、气嘴。
具体实施方式
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
如图1所示，本机床用弹簧结构包括正对设置的上板1和下板2以及竖直设于上板1和下板2之间的压缩弹簧3，压缩弹簧3有两根且位置并列设置。在本实施例中，压缩弹簧3的两端均通过焊接方式分别与上板1和下板2固连。
具体来说，两压缩弹簧3之间竖直设有气筒4，且气筒4的下端与下板2固连。优选气筒4和下板2通过焊接方式固连。气筒4内竖直设有连杆5，连杆5的上端伸出气筒4并与上板1固连，连杆5的下端侧壁与气筒4的内壁之间形成密封。在本实施例中，连杆5的外侧壁和圆筒的内侧壁为相互匹配的圆柱面且两者贴靠在一起，以确保连杆5滑动的顺畅性和稳定性。连杆5的外侧壁上开设有环形凹槽，且环形凹槽和连杆5同轴线布置，环形凹槽内设有密封圈6，且密封圈6的外侧壁与圆筒的内侧壁相抵，使连杆5和圆筒之间形成可靠密封。
气筒4的下端内壁上一体成型有环形挡肩4a，且环形挡肩4a和气筒4同轴线布置。环形挡肩4a将气筒4的内腔分成上腔4b和下腔4c，上腔4b内水平设有密封板7，优选密封板7和气筒4同轴线布置。密封板7外径小于上腔4b内径，此时，密封板7侧壁和气筒4内侧壁之间存在环形间隙。密封板7与气筒4滑动连接，密封板7抵压在环形挡肩4a上并封闭环形挡肩4a的上端口，下腔4c内设有使密封板7具有向上移动趋势并开启环形挡肩4a上端口的伸缩弹簧8。具体来说，下板2的顶壁上垂直固定有导柱9，且优先导柱9和下板2通过焊接方式固连。导柱9外套有导管，导管上端穿过环形挡肩4a并与密封板7固连，伸缩弹簧8套设在导管外，且伸缩弹簧8的两端分别与密封板7和下板2相抵。密封板7的底壁上开设有呈环状的定位槽，定位槽内固定有环形密封垫11，环形密封垫11顶壁与定位槽底壁相抵，当密封板7紧压在环形挡肩4a上时，环形密封垫11底壁能紧压在环形挡肩4a顶壁上，以加强将环形挡肩4a上端口封闭的效果。
如图1和图2所示，气筒4的侧壁上贯穿设有与上腔4b连通的气孔4d，且气筒4外固定有与气孔4d连通的气嘴12，下板2上贯穿设有与下腔4c连通的排气孔4d2a，且排气孔4d2a至少有两个。进一步说明，气孔4d呈条状并倾斜设置，气孔4d的上端口和下端口分别位于气筒4的外侧壁和内侧壁上，且气孔4d的下端口正对密封板7顶壁，使密封板7更易克服伸缩弹簧8弹力下移，来提高操作效率和方便性。气筒4的外侧壁上一体成型有呈管状的进气部4e，气孔4d的上端口与进气部4e连通，气嘴12包括呈管状的出气部，且出气部螺纹连接在进气部4e内。
使用过程如下：如图3所示，初始状态时，密封板7在伸缩弹簧8作用下上移打开环形挡肩4a上端口；如图1所示，使用时，通过气嘴12往上腔4b内灌入压缩气体，密封板7在气压作用下克服伸缩弹簧8弹力逐渐下移直至封闭环形挡肩4a上端口，当上腔4b内的气压到达设定值时停止供气；工作时，上板1受外力作用同时克服两压缩弹簧3的弹力以及压缩气体的压力下移实现缓冲；如图3所示，当气筒4内的压缩气体不承担缓冲作用时，通过气嘴12排出气筒4内的压缩气体，此时，密封板7在伸缩弹簧8作用下上移重新打开环形挡肩4a上端口，使连杆5的滑动不受阻。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (7)

1.机床用弹簧结构，包括上板、下板以及竖直设于上板和下板之间的压缩弹簧，压缩弹簧有两根且位置并列设置，其特征在于，两所述的压缩弹簧之间竖直设有气筒，且气筒的下端与下板固连，气筒内竖直设有连杆，连杆的上端伸出气筒并与上板固连，连杆的下端侧壁与气筒的内壁之间形成密封；所述的气筒的下端内壁上一体成型有环形挡肩，且环形挡肩将气筒的内腔分成上腔和下腔，上腔内水平设有密封板，且密封板外径小于上腔内径，密封板与气筒滑动连接，密封板抵压在环形挡肩上并封闭环形挡肩的上端口，下腔内设有使密封板具有向上移动趋势并开启环形挡肩上端口的伸缩弹簧，所述的气筒的侧壁上贯穿设有与上腔连通的气孔，且气筒外固定有与气孔连通的气嘴，下板上贯穿设有与下腔连通的排气孔。
2.根据权利要求1所述的机床用弹簧结构，其特征在于，所述的连杆的外侧壁和圆筒的内侧壁为相互匹配的圆柱面且两者贴靠在一起。
3.根据权利要求2所述的机床用弹簧结构，其特征在于，所述的连杆的外侧壁上开设有环形凹槽，环形凹槽内设有密封圈，且密封圈的外侧壁与圆筒的内侧壁相抵。
4.根据权利要求1所述的机床用弹簧结构，其特征在于，所述的密封板的底壁上开设有呈环状的定位槽，定位槽内固定有环形密封垫，环形密封垫顶壁与定位槽底壁相抵，当密封板紧压在环形挡肩上时，环形密封垫底壁能紧压在环形挡肩顶壁上。
5.根据权利要求1或2或3或4所述的机床用弹簧结构，其特征在于，所述的下板的顶壁上垂直固定有导柱，导柱外套有导管，导管上端穿过环形挡肩并与密封板固连，伸缩弹簧套设在导管外，且伸缩弹簧的两端分别与密封板和下板相抵。
6.根据权利要求1所述的机床用弹簧结构，其特征在于，所述的气孔呈条状并倾斜设置，气孔的上端口和下端口分别位于气筒的外侧壁和内侧壁上，且气孔的下端口正对密封板顶壁。
7.根据权利要求6所述的机床用弹簧结构，其特征在于，所述的气筒的外侧壁上一体成型有呈管状的进气部，气孔的上端口与进气部连通，气嘴包括呈管状的出气部，且出气部螺纹连接在进气部内。
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