WO2022057750A1 - 一种具有轴承结构的防松动紧固组件 - Google Patents

一种具有轴承结构的防松动紧固组件 Download PDF

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Publication number
WO2022057750A1
WO2022057750A1 PCT/CN2021/117901 CN2021117901W WO2022057750A1 WO 2022057750 A1 WO2022057750 A1 WO 2022057750A1 CN 2021117901 W CN2021117901 W CN 2021117901W WO 2022057750 A1 WO2022057750 A1 WO 2022057750A1
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Prior art keywords
inner ring
bearing
outer ring
extension
nut
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PCT/CN2021/117901
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English (en)
French (fr)
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王春一
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王春一
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Publication of WO2022057750A1 publication Critical patent/WO2022057750A1/zh

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Classifications

    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows

Definitions

  • the utility model relates to an anti-loose fastening component, in particular to an anti-loose fastening component with a bearing structure.
  • Nuts and screws are widely used in various fields as well-known fastening components.
  • the ultimate purpose of using the nut and the screw together is to prevent the looseness between the connectors.
  • the existing connection structure of the nut and the screw mainly relies on the simple threaded connection between the screw and the nut.
  • mechanical vibration and other external forces will This causes the threads of the nut and threaded rod to loosen, which in turn leads to loosening of the connection.
  • people usually use one screw with two nuts. However, because the two nuts are separate, the outermost nut will also regress and loosen under the action of vibration and other external forces, and then another A nut will also be back and loose, and the problem has not been fundamentally solved.
  • the best anti-loosening effect is the nut and screw kit produced by the Japanese company HardLock.
  • Its anti-loosening mechanism is composed of two nuts, one is convex and the other is concave.
  • Convex nut With an eccentric boss, the concave nut is a perfect circle. They screw the graphic nut into the groove of the concave nut through the wedge-shaped tightening principle, and use the eccentric shape to mechanically generate the tension force transverse to the screw to achieve tightness. It is not easy to loosen under a certain intensity of vibration, but this wedge-shaped fastening method will cause metal fatigue.
  • the tightening process uses a one-way tightening force, and the direction of the vibration force and other external forces is uncertain, it does not necessarily vibrate in the direction of nut tightening all the time. Under the vibration, the nut will regress and loosen. It will cause the fastened object to loosen, resulting in an unsafe hazard.
  • the purpose of the utility model is to provide an anti-loosening fastening assembly with a bearing structure, which is simple in structure and can maintain a good fastening effect under high-frequency irregular vibration.
  • an anti-loosening fastening assembly with a bearing structure comprising a nut and a screw rod, the nut is a fastening nut, and includes a bearing outer ring, a bearing inner ring and a set A bearing body composed of rolling elements between the bearing outer ring and the bearing inner ring; the bearing inner ring is provided with an inner ring extension extending outward along the axis of the bearing body, and the inner ring extension is located in the bearing body.
  • the inner ring of the bearing and the extension of the inner ring form the inner ring of the fastening nut;
  • the outer ring of the bearing is provided with an extension of the outer ring extending outward along the axis of the bearing body, and the extension of the outer ring is located in the outer ring of the bearing body.
  • the other side; the outer ring of the bearing and the extension of the outer ring form the outer ring of the tightening nut; the inner side walls of the inner ring of the tightening nut and the extension of the outer ring are distributed with internal threads; among them, the inner ring of the bearing in the inner ring of the tightening nut
  • the thread rotation direction of the inner thread in the extension section of the inner ring is the same as that of the inner thread in the extension section of the inner ring, and the rotation direction of the inner thread of the extension section of the outer ring is opposite to the thread rotation direction of the inner thread of the inner ring of the tightening nut;
  • the screw is a tightening screw, and the connection of the tightening screw
  • the end includes an inner ring connecting column and an outer ring connecting column integrally connected from top to bottom, and the outer diameters of the inner ring connecting column and the outer ring connecting column are respectively matched with the inner diameter and axial length of the inner ring and the outer ring extension of
  • the axial length of the inner ring of the fastening nut is greater than the axial length of the extension section of the outer ring.
  • the inner ring extension has the same inner diameter as the bearing inner ring, and the bearing inner ring and the inner ring extension are provided with continuous internal threads.
  • the inner diameter of the outer ring extension is the same as that of the bearing outer ring.
  • the connecting end of the tightening screw has a convex structure.
  • the outer contours of the inner ring extension section and the outer ring of the fastening nut are regular polygons.
  • the utility model has a simple structure, and utilizes the structural feature that the bearing inner ring and the bearing outer ring of the bearing can perform relative rotation but cannot produce axial displacement under the action of the rolling elements, and the nut structure is integrated into the existing structure.
  • the structure of the inner ring and the outer ring of the bearing is improved to form a two-way fixed fastening nut structure, and the design of the connection structure of the fastening screw breaks the conventional simple single structure between the existing nut and the screw. Restrictions to threaded connections.
  • FIG. 1 is a perspective view of the fastening nut of the present invention.
  • FIG. 2 is a cross-sectional view of the fastening nut of the present invention.
  • Figure 3 is a schematic diagram of the structure of the tightening screw of the present invention.
  • FIG. 4 is a schematic diagram of the use state of the present invention.
  • FIGs 1 to 4 show the specific structure of an anti-loosening fastening assembly with a bearing structure of the present invention.
  • An anti-loosening fastening assembly with a bearing structure includes a fastening nut and a fastening screw 4, wherein, as shown in Figure 1-2: the fastening nut includes a bearing outer ring 2, a bearing inner ring 1 and a The bearing body composed of the rolling elements 3 between the bearing outer ring 2 and the bearing inner ring 1; the bearing inner ring 1 is provided with an inner ring extension 1a extending outward along the axis of the bearing body, and the inner ring extension 1a is located in the inner ring. one side of the bearing body. As shown in Figs.
  • the bearing inner ring 1 and the inner ring extension 1a can be integrally formed to form the inner ring of the fastening nut; the bearing outer ring 2 is provided with an outer ring extension 2a extending outward along the axis of the bearing body, and the outer ring extension 2a is formed. on the other side of the bearing body.
  • the inner diameter of the outer ring extension 2a and the bearing outer ring 2 is the same, and the bearing outer ring 2 and the outer ring extension 2a form the outer ring of the fastening nut; so that the inner diameter of the fastening nut is Under the action of the rolling elements 3, the ring and the outer ring of the fastening nut rotate relative to the axis of the bearing body as the axis.
  • Internal threads are distributed on the inner side walls of the inner ring of the fastening nut and the extension 2a of the outer ring, preferably the inner ring 1 of the bearing and the extension 1a of the inner ring are provided with continuous internal threads; wherein, the bearing in the inner ring of the fastening nut is
  • the rotation directions of the internal threads of the inner ring 1 and the inner ring extension 1a are the same, but are opposite to the rotation directions of the threads of the inner threads of the outer ring extension 2a.
  • the connecting end of the tightening screw 4 is a convex structure as shown in FIG. 3 : the connecting end of the tightening screw 4 includes an inner ring connecting column 4a and an outer ring connecting column 4b integrally connected from top to bottom, wherein , the outer diameters of the inner ring connecting column 4a and the outer ring connecting column 4b are respectively matched with the inner diameter and axial length of the inner ring and the outer ring extension 2a of the fastening nut; the outer diameter of the inner ring connecting column 4a and the outer ring connecting column 4b
  • the surface is provided with external threads which are respectively matched with the internal threads of the inner ring of the fastening nut and the extended section 2a of the outer ring.
  • the axial length of the inner ring of the fastening nut should be greater than the axial length of the outer ring extension 2a.
  • the outer contours of the inner ring extension 1a and the outer ring of the fastening nut are regular polygons.
  • the nut of the present invention is inserted into the connecting end of the tightening screw 4, because the inner ring shaft of the tightening nut is Therefore, the top end of the inner ring connecting column 4a of the tightening screw 4 is first threaded with the bearing inner ring 1, and at this time, the tool is used along the inner ring of the tightening nut.

Abstract

一种具有轴承结构的防松动紧固组件，包括紧固螺母和紧固螺杆（4），紧固螺母的轴承内圈（1）设有内圈延长段（1a），内圈延长段（1a）位于轴承本体一侧；轴承内圈（1）与内圈延长段（1a）组成紧固螺母内圈；轴承外圈（2）设有外圈延长段（2a），外圈延长段（2a）位于轴承本体另一侧；紧固螺母内圈及外圈延长段（2a）均设有内螺纹；轴承内圈（1）及内圈延长段（1a）中的内螺纹的螺纹旋转方向一致，而与外圈延长段（2a）的内螺纹方向相反；紧固螺杆（4）的内圈连接柱（4a）和外圈连接柱（4b）分别与紧固螺母内圈和外圈延长段（2a）相配适；内圈连接柱（4a）和外圈连接柱（4b）分别设有与紧固螺母内圈和外圈延长段（2a）相配适的外螺纹。

Description

一种具有轴承结构的防松动紧固组件 技术领域
本实用新型涉及一种防松动紧固组件，尤其是一种具有轴承结构的防松动紧固组件。
 背景技术
螺母和螺杆作为公知的紧固组件被广泛应用于多种领域。螺母和螺杆配合使用的最终目的防止连接件之间松动，现有的螺母和螺杆的连接结构主要依靠螺杆与螺母之间简单的螺纹连接实现，而在实际应用中，机械振动和其他外力作用都会导致螺母和螺杆的螺纹松动，从而导致连接件松动。为了避免这一现象，人们通常采用的方法为一个螺杆配合两个螺母使用，但由于两个螺母是分体的，在振动和其他外力作用下同样会导致最外侧的螺母产生退行松动，继而另一个螺母也会产生退行松动，问题没有得到根本解决。目前防松动效果较好的是日本哈德洛克（HardLock）公司生产的螺母和螺杆套件，它的防松动机制是有两个螺母组成，一个是凸形的，一个是凹形的，凸形螺母带有一个偏心凸台，凹形螺母为正圆形，它们通过楔形紧固原理使图形螺母旋进凹形螺母的凹槽内，利用偏心形状机械的产生横向于螺杆的张紧力，达到紧固效果，在一定强度的震动下不易松动，但这种楔形紧固方式会导致金属疲劳。再者，由于紧固过程是使用的是单向旋紧力，而振动力和其它外力的方向是不确定的，并不一定一直朝着螺母旋紧方向振动，在高强度，高频率无规则的振动下，螺母是会产生退行松动的。导致被紧固的物体松动，造成不安全隐患。
 技术问题
本实用新型的目的是提供一种结构简单、可在高频率无规律振动下保持良好紧固效果的具有轴承结构的防松动紧固组件。
 技术解决方案
本实用新型解决现有技术问题所采用的技术方案：一种具有轴承结构的防松动紧固组件，包括螺母和螺杆，所述螺母为紧固螺母，包括由轴承外圈、轴承内圈和设置于轴承外圈和轴承内圈之间的滚动体组成的轴承本体；所述轴承内圈沿轴承本体的轴线设有向外延伸的内圈延长段，并使该内圈延长段位于轴承本体的一侧；轴承内圈与内圈延长段组成紧固螺母内圈；所述轴承外圈沿轴承本体的轴线设有向外延伸的外圈延长段，并使该外圈延长段位于轴承本体的另一侧；轴承外圈与外圈延长段组成紧固螺母外圈；紧固螺母内圈及外圈延长段的内侧壁均分布有内螺纹；其中，紧固螺母内圈中的轴承内圈及内圈延长段中的内螺纹的螺纹旋转方向一致，外圈延长段的内螺纹与紧固螺母内圈的内螺纹的螺纹旋转方向相反；所述螺杆为紧固螺杆，紧固螺杆的连接端包括由上至下一体连接的内圈连接柱和外圈连接柱，内圈连接柱和外圈连接柱的外径分别与紧固螺母内圈和外圈延长段的内径及轴向长度相配适；内圈连接柱和外圈连接柱的外表面设有分别与紧固螺母内圈和外圈延长段的内螺纹相配适的外螺纹。
所述紧固螺母内圈的轴向长度大于外圈延长段的轴向长度。
所述内圈延长段与轴承内圈的内径相同，且轴承内圈及内圈延长段中设有连续的内螺纹。
所述外圈延长段与轴承外圈的内径相同。
所述紧固螺杆的连接端为凸形结构。
所述内圈延长段及紧固螺母外圈的外轮廓为正多边形。
 有益效果
本实用新型的有益效果在于：本实用新型结构简单，利用轴承的轴承内圈与轴承外圈在滚动体的作用下可进行相对旋转但不能产生轴向位移的结构特点，将螺母结构在现有的轴承结构基础上，将轴承内圈和外圈结构进行改进形成了具有双向固定的紧固螺母结构，配合紧固螺杆的连接结构的设计，打破了现有螺母与螺杆之间惯用的简单单向螺纹连接的限制。使本实用新型在向相反方向旋拧紧固于紧固螺杆上时，紧固螺母内圈和紧固螺母外圈之间达到相互制约的作用，在单向旋拧力或振动以及其他外力下不会产生退行松动，属于真正意义上的不松动紧固组件。
 附图说明
图1是本实用新型的紧固螺母的透视图。
图2是本实用新型的紧固螺母的剖面图。
图3是本实用新型的紧固螺杆结构示意图。
图4是本实用新型的使用状态示意图。
图中：1-轴承内圈、2-轴承外圈、3-滚动体、4-螺杆、1a-内圈延长段、2a-外圈延长段、4a-内圈连接柱、4b-外圈连接柱。
 本发明的实施方式
以下结合附图及具体实施方式对本实用新型进行说明：
图1-图4示出了本实用新型一种具有轴承结构的防松动紧固组件的具体结构。一种具有轴承结构的防松动紧固组件，包括紧固螺母和紧固螺杆4，其中，如图1-2所示：紧固螺母包括由轴承外圈2、轴承内圈1和固定设置在轴承外圈2和轴承内圈1之间的滚动体3组成的轴承本体；轴承内圈1沿轴承本体的轴线设有向外延伸的内圈延长段1a，并使该内圈延长段1a位于轴承本体的一侧。如图1-2所示，可优选使内圈延长段1a与轴承内圈1的内径相同。轴承内圈1与内圈延长段1a可一体成型从而形成紧固螺母内圈；轴承外圈2沿轴承本体的轴线设有向外延伸的外圈延长段2a，并使该外圈延长段2a位于轴承本体的另一侧。如图1-2所示，作为优选实施方式：外圈延长段2a与轴承外圈2的内径相同，轴承外圈2与外圈延长段2a组成紧固螺母外圈；从而使紧固螺母内圈与紧固螺母外圈在滚动体3的作用下以轴承本体的轴线为轴进行相对转动。紧固螺母内圈及外圈延长段2a的内侧壁上均分布有内螺纹，优选轴承内圈1及内圈延长段1a中设有连续的内螺纹；其中，紧固螺母内圈中的轴承内圈1及内圈延长段1a中的内螺纹的螺纹旋转方向一致，但与外圈延长段2a的内螺纹的螺纹旋转方向相反。
相对应地，紧固螺杆4的连接端为如图3所示的凸形结构：紧固螺杆4的连接端包括由上至下一体连接的内圈连接柱4a和外圈连接柱4b，其中，内圈连接柱4a和外圈连接柱4b的外径分别与紧固螺母内圈和外圈延长段2a的内径及轴向长度相配适；内圈连接柱4a和外圈连接柱4b的外表面设有分别与紧固螺母内圈和外圈延长段2a的内螺纹相配适的外螺纹。
为保证内圈连接柱4a与紧固螺母内圈的紧固效果，紧固螺母内圈轴向的长度要大于外圈延长段2a的轴向长度。
为了便于使用工具对螺母进行旋拧，在内圈延长段1a及紧固螺母外圈的外轮廓为正多边形。
当使用本实用新型进行紧固连接时，当紧固螺杆4的连接端穿过被紧固件后，在紧固螺杆4的连接端套入本实用新型的螺母，由于紧固螺母内圈轴向的长度要大于外圈延长段2a的轴向长度，因此，紧固螺杆4的内圈连接柱4a的顶端首先与轴承内圈1进行螺纹连接，此时使用工具沿紧固螺母内圈的螺纹方向旋拧紧固螺母内圈直至紧固螺杆4的外圈连接柱4b的顶端到达螺母的外圈延长段2a的内螺纹时，由于外圈延长段2a与紧固螺母内圈的内螺纹的螺纹旋转方向相反，此时，需要用另一工具沿外圈延长段2a螺纹方向对紧固螺母内圈和紧固螺母外圈进行同时旋拧，使紧固螺杆4同步前进，直至紧固螺杆4的连接端与螺母达到完全紧固状态（图4）。当需要松卸时，用两个旋拧工具同步向相反方向旋拧紧固螺母内圈和紧固螺母外圈 ，即可完成松卸。
以上内容是结合具体的优选技术方案对本实用新型所作的进一步详细说明，不能认定本实用新型的具体实施只局限于这些说明。对于本实用新型所属技术领域的普通技术人员来说，在不脱离本实用新型构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本实用新型的保护范围。

Claims (6)

  1. 一种具有轴承结构的防松动紧固组件，包括螺母和螺杆，其特征在于，所述螺母为紧固螺母，包括由轴承外圈（2）、轴承内圈（1）和设置于轴承外圈（2）和轴承内圈（1）之间的滚动体（3）组成的轴承本体；所述轴承内圈（1）沿轴承本体的轴线设有向外延伸的内圈延长段（1a），并使该内圈延长段（1a）位于轴承本体的一侧；轴承内圈（1）与内圈延长段（1a）组成紧固螺母内圈；所述轴承外圈（2）沿轴承本体的轴线设有向外延伸的外圈延长段（2a），并使该外圈延长段（2a）位于轴承本体的另一侧；轴承外圈（2）与外圈延长段（2a）组成紧固螺母外圈；紧固螺母内圈及外圈延长段（2a）的内侧壁均分布有内螺纹；其中，紧固螺母内圈中的轴承内圈（1）及内圈延长段（1a）中的内螺纹的螺纹旋转方向一致，外圈延长段（2a）的内螺纹与紧固螺母内圈的内螺纹的螺纹旋转方向相反；所述螺杆为紧固螺杆（4），紧固螺杆（4）的连接端包括由上至下一体连接的内圈连接柱（4a）和外圈连接柱（4b），内圈连接柱（4a）和外圈连接柱（4b）的外径分别与紧固螺母内圈和外圈延长段（2a）的内径及轴向长度相配适；内圈连接柱（4a）和外圈连接柱（4b）的外表面设有分别与紧固螺母内圈和外圈延长段（2a）的内螺纹相配适的外螺纹。
  2. 根据权利要求1所述的一种具有轴承结构的防松动紧固组件，其特征在于，所述紧固螺母内圈轴向的长度大于外圈延长段（2a）的轴向长度。
  3. 根据权利要求1所述的一种具有轴承结构的防松动紧固组件，其特征在于，所述内圈延长段（1a）与轴承内圈（1）的内径相同，且轴承内圈（1）及内圈延长段（1a）中设有连续的内螺纹。
  4. 根据权利要求1所述的一种具有轴承结构的防松动紧固组件，其特征在于，所述外圈延长段（2a）与轴承外圈（2）的内径相同。
  5. 根据权利要求1所述的一种具有轴承结构的防松动紧固组件，其特征在于，所述紧固螺杆（4）的连接端为凸形结构。
  6. 根据权利要求1所述的一种具有轴承结构的防松动紧固组件，其特征在于，所述内圈延长段（1a）及紧固螺母外圈的外轮廓为正多边形。
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