CN105485138A - Pre-tightening bolt assembly - Google Patents
Pre-tightening bolt assembly Download PDFInfo
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- CN105485138A CN105485138A CN201410531108.3A CN201410531108A CN105485138A CN 105485138 A CN105485138 A CN 105485138A CN 201410531108 A CN201410531108 A CN 201410531108A CN 105485138 A CN105485138 A CN 105485138A
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Abstract
本发明公开了一种预紧螺栓组件，包括螺栓本体和与之相配合的螺帽，螺栓本体的螺杆中开设有一空腔，空腔的深度大于螺杆的长度，空腔的端部设有内螺纹，还包括一用于穿设于空腔内的顶杆，顶杆的另一端设有与内螺纹相配合的螺纹部，且顶杆的长度大于空腔的深度，螺纹部的端部还设有一用于扭转顶杆的拧紧端，顶杆上缠绕有加热电阻丝，加热电阻丝穿过螺纹部和拧紧端后与接线端相连接。本发明通过在螺杆中开设空腔，并且在空腔内设置顶杆，在使用时，通过加热电阻丝加热螺杆，螺杆受热膨胀伸长，并且通过内螺纹和螺纹部的配合将螺杆拉伸产生弹性变形，然后将螺母与螺杆拧紧，松开顶杆以后，螺母和螺杆的预紧力大大提高。
The invention discloses a pre-tightened bolt assembly, which comprises a bolt body and a nut matched therewith. A cavity is provided in the screw rod of the bolt body, the depth of the cavity is greater than the length of the screw rod, and the end of the cavity is provided with an inner The screw thread also includes a push rod for passing through the cavity, the other end of the push rod is provided with a threaded part matched with the internal thread, and the length of the push rod is greater than the depth of the cavity, and the end of the threaded part is also A tightening end for twisting the ejector rod is provided, a heating resistance wire is wound on the ejector rod, and the heating resistance wire passes through the threaded part and the tightening end and is connected to the terminal. In the present invention, a cavity is opened in the screw, and a ejector rod is arranged in the cavity. When in use, the screw is heated by the heating resistance wire, the screw expands and elongates when heated, and the screw is stretched through the cooperation of the internal thread and the threaded part to produce After elastic deformation, the nut and the screw are tightened, and after the ejector rod is loosened, the pre-tightening force of the nut and the screw is greatly improved.
Description
技术领域technical field
本发明涉及螺栓技术领域，尤其涉及一种预紧螺栓组件。The invention relates to the technical field of bolts, in particular to a pre-tightening bolt assembly.
背景技术Background technique
在大型压力机，大型工程机械中，立柱、工作台等大件之间都需要用到螺栓把合连接。目前，各部件连接时通常用大螺栓连接，但是对于大螺栓实现预紧，预紧力要求极大，一直没有可靠又可行的办法。In large-scale presses and large-scale construction machinery, bolts are required to connect large parts such as columns and workbenches. At present, large bolts are usually used to connect various components, but for large bolts to achieve pre-tightening, the pre-tightening force is extremely required, and there has been no reliable and feasible method.
发明内容Contents of the invention
本发明主要是解决现有技术中所存在的技术问题，从而提供一能有效提高螺栓预紧力的预紧螺栓组件。The present invention mainly solves the technical problems existing in the prior art, thereby providing a pre-tightening bolt assembly that can effectively improve the pre-tightening force of the bolts.
本发明的上述技术问题主要是通过下述技术方案得以解决的：Above-mentioned technical problem of the present invention is mainly solved by following technical scheme:
本发明的一种预紧螺栓组件，包括螺栓本体和与之相配合的螺帽，所述螺栓本体的螺杆中开设有一空腔，所述空腔的深度大于所述螺杆的长度，所述空腔的端部设有内螺纹，还包括一用于穿设于所述空腔内的顶杆，所述顶杆的一端用于顶紧所述空腔的底部，所述顶杆的另一端设有与所述内螺纹相配合的螺纹部，且所述顶杆的长度大于所述空腔的深度，所述螺纹部的端部还设有一用于扭转顶杆的拧紧端，所述顶杆上缠绕有加热电阻丝，所述加热电阻丝穿过螺纹部和拧紧端后与接线端相连接。A pre-tightened bolt assembly of the present invention comprises a bolt body and a nut matched therewith, a cavity is opened in the screw of the bolt body, the depth of the cavity is greater than the length of the screw, and the cavity The end of the cavity is provided with an internal thread, and also includes a push rod for passing through the cavity, one end of the push rod is used to tighten the bottom of the cavity, and the other end of the push rod A threaded portion matched with the internal thread is provided, and the length of the ejector rod is greater than the depth of the cavity, and the end of the threaded portion is also provided with a tightening end for twisting the ejector rod, and the ejector rod A heating resistance wire is wound on the rod, and the heating resistance wire is connected to the terminal after passing through the threaded part and the tightening end.
进一步地，所述加热电阻丝与所述接线端之间还设有一电刷滑环，且所述电刷滑环与所述拧紧端相连接。Further, a brush slip ring is provided between the heating resistance wire and the terminal, and the brush slip ring is connected to the tightening end.
进一步地，所述空腔的底部形状为锥形，所述顶杆的端部形状为球形。Further, the shape of the bottom of the cavity is conical, and the shape of the end of the ejector rod is spherical.
进一步地，所述顶杆上开设有螺旋槽，所述加热电阻丝缠绕于所述螺旋槽内。Further, a spiral groove is opened on the ejector rod, and the heating resistance wire is wound in the spiral groove.
与现有技术相比，本发明的优点在于：通过在螺杆中开设空腔，并且在空腔内设置顶杆，在使用时，通过加热电阻丝加热螺杆，螺杆受热膨胀伸长，并且通过内螺纹和螺纹部的配合将螺杆拉伸产生弹性变形，然后将螺母与螺杆拧紧，松开顶杆以后，螺母和螺杆的预紧力大大提高。Compared with the prior art, the present invention has the advantages that: by opening a cavity in the screw, and setting the ejector rod in the cavity, when in use, the screw is heated by the heating resistance wire, the screw expands and elongates when heated, and passes through the inner The cooperation between the thread and the thread part stretches the screw to produce elastic deformation, and then the nut and the screw are tightened. After the ejector rod is loosened, the pre-tightening force of the nut and the screw is greatly improved.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是本发明中的预紧螺栓组件的结构示意图；Fig. 1 is the structural representation of pretightening bolt assembly among the present invention;
图2是图1中I处的局部放大视图。Fig. 2 is a partially enlarged view of I in Fig. 1 .
具体实施方式detailed description
下面结合附图对本发明的优选实施例进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
参阅图1、图2所示，本发明的一种预紧螺栓组件，包括螺栓本体1和与之相配合的螺帽2，螺栓本体1的螺杆11中开设有一空腔12，空腔12的深度大于螺杆11的长度，空腔12的端部设有内螺纹13，还包括用于穿设于空腔12内的顶杆3，顶杆3的一端用于顶紧空腔12的底部，顶杆3的另一端设有与内螺纹13相配合的螺纹部31，且顶杆3的长度大于空腔12的深度，螺纹部31的端部还设有一用于扭转顶杆3的拧紧端32，该拧紧端32方便将顶杆3拧紧，其可以制作成六角头型，或方型，又或者直接开一横向通孔等。通过在螺杆11中开设空腔12，并且在空腔12内设置顶杆3，在使用时，通过螺杆11上的内螺纹13和顶杆3上的螺纹部31的配合拧紧，将螺杆11拉伸产生弹性变形，然后将螺母2与螺杆11拧紧，松开且拿出顶杆3以后，螺母和螺杆11的预紧力大大提高，该顶杆3可多次使用。并且顶杆3上缠绕有加热电阻丝4，加热电阻丝4穿过螺纹部31和拧紧端32后与接线端5相连接。通过电阻丝4对螺栓本体1的螺杆11加热，螺杆11膨胀伸长，拧紧螺母以后，当螺杆11冷却至常温时收缩，进一步提高螺栓的预紧力。Referring to Fig. 1 and Fig. 2, a pre-tightening bolt assembly of the present invention includes a bolt body 1 and a nut 2 matched therewith, and a cavity 12 is provided in the screw rod 11 of the bolt body 1, and the cavity 12 The depth is greater than the length of the screw rod 11. The end of the cavity 12 is provided with an internal thread 13, and also includes a push rod 3 for passing through the cavity 12. One end of the push rod 3 is used to tighten the bottom of the cavity 12. The other end of the push rod 3 is provided with a threaded part 31 that matches the internal thread 13, and the length of the push rod 3 is greater than the depth of the cavity 12, and the end of the threaded part 31 is also provided with a tightening end for twisting the push rod 3 32. The tightening end 32 is convenient for tightening the push rod 3, and it can be made into a hexagonal head shape, or a square shape, or directly open a transverse through hole. By opening a cavity 12 in the screw rod 11, and setting the ejector rod 3 in the cavity 12, when in use, the threaded part 31 on the screw rod 11 and the threaded part 31 on the screw rod 11 are tightened to pull the screw rod 11. Stretching produces elastic deformation, then the nut 2 and the screw rod 11 are tightened, and after loosening and taking out the push rod 3, the pretightening force of the nut and the screw rod 11 is greatly improved, and the push rod 3 can be used many times. In addition, the push rod 3 is wound with a heating resistance wire 4 , and the heating resistance wire 4 passes through the threaded portion 31 and the tightening end 32 and is connected to the terminal 5 . The screw rod 11 of the bolt body 1 is heated by the resistance wire 4, the screw rod 11 expands and stretches, and after the nut is tightened, the screw rod 11 shrinks when cooled to normal temperature, further increasing the pre-tightening force of the bolt.
优选的，加热电阻丝4与接线端5之间还设有一电刷滑环33，且电刷滑环33与拧紧端32相连接。通过电刷滑环33拧紧顶杆3时，电刷滑环33的目的在于顶杆3旋转拧紧时，接线端5的线路不会扭转。最优的，空腔12的底部形状为锥形，顶杆3的端部形状为球形，顶杆3与空腔12底部为线接触，顶杆3旋转时摩擦力小，方便拧紧。顶杆3上开设有螺旋槽34，加热电阻丝4缠绕于螺旋槽34内。螺旋槽34可以保护加热电阻丝4不会挤压至空腔12侧壁，防止加热电阻丝4挤压损坏。Preferably, a brush slip ring 33 is further provided between the heating resistance wire 4 and the terminal 5 , and the brush slip ring 33 is connected to the tightening end 32 . When the push rod 3 is tightened by the brush slip ring 33, the purpose of the brush slip ring 33 is that when the push rod 3 is rotated and tightened, the circuit of the terminal 5 will not be twisted. Optimally, the shape of the bottom of the cavity 12 is conical, the shape of the end of the ejector rod 3 is spherical, the ejector rod 3 is in line contact with the bottom of the cavity 12, and the friction force is small when the ejector rod 3 rotates, which is convenient for tightening. A spiral groove 34 is opened on the ejector rod 3 , and the heating resistance wire 4 is wound in the spiral groove 34 . The spiral groove 34 can protect the heating resistance wire 4 from being squeezed to the side wall of the cavity 12, preventing the heating resistance wire 4 from being squeezed and damaged.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何不经过创造性劳动想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求书所限定的保护范围为准。The above is only a specific implementation of the present invention, but the scope of protection of the present invention is not limited thereto, and any changes or replacements that do not come to mind through creative work shall be covered within the scope of protection of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope defined in the claims.
Claims (4)
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| CN201410531108.3A CN105485138B (en) | 2014-10-09 | 2014-10-09 | Pre-tightening bolt assembly |
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| CN201410531108.3A CN105485138B (en) | 2014-10-09 | 2014-10-09 | Pre-tightening bolt assembly |
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| CN105485138A true CN105485138A (en) | 2016-04-13 |
| CN105485138B CN105485138B (en) | 2019-12-20 |
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Cited By (7)
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| CN106286533A (en) * | 2015-05-22 | 2017-01-04 | 凤冈县凤鸣农用机械制造有限公司 | A kind of pretension bolt assembly |
| CN106391742A (en) * | 2016-11-21 | 2017-02-15 | 考迈托（佛山）挤压科技股份有限公司 | Extruder pull rod structure and installation method |
| CN109676989A (en) * | 2019-01-30 | 2019-04-26 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press crankshaft-link rod clamp device |
| CN109773104A (en) * | 2019-01-30 | 2019-05-21 | 荣成华东锻压机床股份有限公司 | A kind of mechanical press screw rod set clamp device and method |
| CN109798296A (en) * | 2019-01-30 | 2019-05-24 | 荣成华东锻压机床股份有限公司 | A kind of clamp device and method on mechanical press |
| CN110107581A (en) * | 2019-04-30 | 2019-08-09 | 西京学院 | A kind of anti-loose fastening device and its application method |
| WO2021128574A1 (en) * | 2019-12-27 | 2021-07-01 | 南京金鑫传动设备有限公司 | Bolt kit and connection looseness prevention method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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|---|---|
| CN105485138B (en) | 2019-12-20 |
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