CN117072543A - A bolt tightening and anti-loosening device - Google Patents
A bolt tightening and anti-loosening device Download PDFInfo
- Publication number
- CN117072543A CN117072543A CN202311113042.1A CN202311113042A CN117072543A CN 117072543 A CN117072543 A CN 117072543A CN 202311113042 A CN202311113042 A CN 202311113042A CN 117072543 A CN117072543 A CN 117072543A
- Authority
- CN
- China
- Prior art keywords
- fastening
- loosening
- bolt
- thread
- locknut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
-
- 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
- F16B37/00—Nuts or like thread-engaging members
-
- 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
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
本发明公开了一种螺栓紧固防松装置，包括连接底板、连接板、防松垫圈、紧固螺栓、防松螺母、开口销。其中连接底板紧固内螺纹与紧固螺栓紧固外螺纹组成紧固螺纹副，防松垫圈防松外螺纹与防松螺母防松内螺纹组成防松螺纹副，紧固螺纹副与防松螺纹副旋向相反，通过两对旋向相反的螺纹实现互相限位，从而防止螺栓的松动。开口销贯穿紧固螺栓与防松螺母彻底阻止其相对转动，从而阻止螺栓的松动。
The invention discloses a bolt tightening and anti-loosening device, which includes a connecting bottom plate, a connecting plate, an anti-loosening washer, a fastening bolt, an anti-loosening nut, and a cotter pin. Among them, the internal fastening thread of the connecting base plate and the external fastening thread of the fastening bolt form a fastening thread pair. The anti-loosening external thread of the anti-loosening washer and the anti-loosening internal thread of the anti-loosening nut form an anti-loosening thread pair. The fastening thread pair and the anti-loosening thread The secondary rotations are in opposite directions, and two pairs of threads with opposite rotations are used to limit each other, thereby preventing the bolt from loosening. The cotter pin penetrates the fastening bolt and the lock nut to completely prevent their relative rotation, thereby preventing the bolt from loosening.
Description
Technical Field
The application relates to the technical field of fastening, in particular to a bolt fastening anti-loosening device and an anti-loosening method.
Background
The bolt connection structure is used as a common fastening means, is widely applied to various mechanical structures, has good quality, is crucial to the overall performance of mechanical equipment, and is one of the main forms of failure of the bolt connection structure. The existing permanent looseness prevention principle is to break a threaded structure or weld a bolt on a connecting piece, and the permanent looseness prevention mechanism cannot be detached and widely used.
The traditional down bolt, a compound thread (bulletin number: CN 1281954A) of Chinese patent adopts a compound structure of positive and negative threads, and the pretightening force can be effectively reserved by means of mutual restriction of left-handed threads and right-handed threads, but the manufacturing process is difficult and the cost is high, in addition, the strength of the threads is reduced, the compound thread is matched with double nuts, and the compound thread cannot be used in some cases.
Disclosure of Invention
The application aims to solve the problems and provides a bolt fastening anti-loosening device.
The application is realized according to the following technical scheme:
a bolt-tightening and anti-loosening device, comprising:
the top surface of the connecting bottom plate is provided with a fastening internal thread extending downwards;
the top surface of the connecting plate is provided with a through connecting hole I;
the top surface of the anti-loosening washer is provided with a through connecting hole II, and the outer circumferential surface of the anti-loosening washer is provided with anti-loosening external threads;
the radial peripheral surface of the screw rod of the fastening bolt is provided with a fastening external thread, the screw cap is provided with a limiting hole I which penetrates through the radial direction, the screw rod passes through the connecting hole II and the connecting hole I and then is screwed on the fastening internal thread, and the fastening internal thread and the fastening external thread form a fastening thread pair;
the middle part of the locknut is provided with a counter bore, the inner peripheral surface is provided with locknut internal threads matched with locknut external threads, the middle upper part of the six outer installation clamping surfaces is provided with three pairs of through limiting holes II, and the locknut internal threads and the locknut external threads form locknut pairs;
and the cotter pin is used for penetrating through the limiting hole I and the limiting hole II.
In some embodiments, the tightening thread pair is counter-handed to the anti-loosening thread pair.
In some embodiments, the central axes of the fastening internal thread, the connecting hole I, the connecting hole II, the anti-loose external thread, the fastening external thread and the anti-loose internal thread coincide.
In some embodiments, the limiting holes i, ii are coincident with the cotter central axis.
In some embodiments, the diameters of the connecting holes I and II are 1mm-2mm larger than the diameter of the screw thread of the fastening bolt.
In some embodiments, the cotter diameter is less than 0.5mm-1mm of the limiting hole I and the limiting hole II.
In some embodiments, after the fastening, the bottom of the counter bore of the locknut is pressed on the nut of the fastening bolt, and the outer edge of the locknut has a preset gap from the connecting plate.
Compared with the prior art, the application has the beneficial effects that:
the fastening screw pair is formed by the fastening internal screw of the connecting bottom plate and the fastening external screw of the fastening bolt, the anti-loosening screw pair is formed by the anti-loosening external screw of the anti-loosening washer and the anti-loosening internal screw of the anti-loosening nut, the fastening screw pair and the anti-loosening screw pair are opposite in screwing direction, and mutual limiting is realized by two pairs of opposite-screwing directions, so that loosening of the bolt is prevented. The cotter pin penetrates through the fastening bolt and the locknut to thoroughly prevent the relative rotation of the fastening bolt and the locknut, so that the permanent locknut of the bolt is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.
In the drawings:
FIG. 1 is a schematic view showing the disassembly of a bolt-tightening and anti-loosening device according to the present application;
fig. 2 is an installation sectional view of the bolt-tightening and anti-loosening device of the present application.
Reference numerals illustrate: the connecting bottom plate 1, the fastening internal thread 11, the connecting plate 2, the connecting hole I21, the lock washer 3, the locking external thread 31, the connecting hole II 32, the fastening bolt 4, the fastening external thread 41, the limiting hole I42, the lock nut 5, the locking internal thread 51, the limiting hole II 52, the counter bore 53 and the cotter pin 6.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application, and the following embodiments are used to illustrate the present application, but are not intended to limit the scope of the present application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, a bolt tightening and anti-loosening device comprises a connecting bottom plate 1, a connecting plate 2, an anti-loosening washer 3, a tightening bolt 4, an anti-loosening nut 5 and a cotter pin 6.
Further, the top surface of the connecting bottom plate 1 is provided with a fastening internal thread 11 extending downwards; the top surface of the connecting plate 2 is provided with a through connecting hole I21; the top surface of the anti-loose washer 3 is provided with a through connecting hole II 32, and the outer circumferential surface is provided with an anti-loose external thread 31; the radial peripheral surface of the screw rod of the fastening bolt 4 is provided with a fastening external thread 41, the screw cap is provided with a limiting hole I42 which penetrates radially, and the screw rod passes through the connecting hole II 32 and the connecting hole I21 and is screwed on the fastening internal thread 11; the middle part of locknut 5 is equipped with counter bore 53, is equipped with on the inner peripheral face and is used for with locking external screw thread 31 complex locking internal screw thread 51, and the well upper portion of outside six installation clamping surfaces is equipped with three pairs of spacing holes II 52 that run through. Cotter pin 6 penetrates through limiting hole I42 and limiting hole II 52.
With continued reference to fig. 1 and 2, the fastening internal thread 11 and the fastening external thread 41 form a fastening thread pair, the locking external thread 31 and the locking internal thread 51 form a locking thread pair, and the fastening thread pair and the locking thread pair are opposite in rotation direction.
With continued reference to fig. 1 and 2, the fastening bolt 4 is connected with the lock washer 3, the connecting plate 2 and the connecting bottom plate 1 in sequence; after the fastening, the bottom of the counter bore 53 of the locknut 5 is pressed on the nut of the fastening bolt 4, and a certain gap is reserved between the outer edge of the locknut 5 and the connecting plate 2.
With continued reference to fig. 1 and 2, the central axes of the fastening female screw 11, the connecting hole i 21, the connecting hole ii 32, the locking male screw 31, the fastening male screw 41, and the locking female screw 51 coincide; the limiting holes I42 and II 52 are coincident with the central axis of the cotter pin 6.
With continued reference to fig. 1 and 2, the diameter of the connecting hole i 21 and the connecting hole ii 32 is 1mm-2mm larger than the diameter of the thread of the fastening bolt 4. The diameter of the cotter pin 6 is smaller than that of the limiting hole I42, and the diameter of the limiting hole II 52 is 0.5mm-1mm.
In summary, the application discloses a bolt fastening anti-loosening device, which comprises a connecting bottom plate, a connecting plate, an anti-loosening washer, a fastening bolt, an anti-loosening nut and a cotter pin. The fastening screw pair is formed by the fastening internal screw of the connecting bottom plate and the fastening external screw of the fastening bolt, the anti-loosening screw pair is formed by the anti-loosening external screw of the anti-loosening washer and the anti-loosening internal screw of the anti-loosening nut, the fastening screw pair and the anti-loosening screw pair are opposite in screwing direction, and mutual limiting is realized through two pairs of opposite-screwing directions, so that loosening of the bolt is prevented. The cotter pin penetrates through the fastening bolt and the locknut to thoroughly prevent relative rotation of the fastening bolt and the locknut, so that loosening of the bolt is prevented.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the application and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.
The foregoing description is only illustrative of the preferred embodiments of the present application and is not to be construed as limiting the application, but is intended to cover all such modifications, equivalent arrangements, variations and adaptations of the application as fall within the purview of the present application without departing from the scope of the application.
Claims (7)
1. A bolt-tightening and anti-loosening device, comprising:
the top surface of the connecting bottom plate (1) is provided with a fastening internal thread (11) extending downwards;
the top surface of the connecting plate (2) is provided with a through connecting hole I (21);
the top surface of the anti-loosening washer (3) is provided with a through connecting hole II (32), and the outer circumferential surface of the anti-loosening washer is provided with an anti-loosening external thread (31);
the fastening bolt (4) is provided with a fastening external thread (41) on the radial peripheral surface of a screw rod, a radial penetrating limit hole I (42) is formed in a nut, the screw rod passes through a connecting hole II (32) and a connecting hole I (21) and then is screwed on the fastening internal thread (11), and the fastening internal thread (11) and the fastening external thread (41) form a fastening thread pair;
the middle part of the locknut (5) is provided with a counter bore (53), the inner peripheral surface is provided with a locknut internal thread (51) which is matched with the locknut external thread (31), the middle upper part of the six outer installation clamping surfaces is provided with three pairs of through limiting holes II (52), and the locknut internal thread (51) and the locknut external thread (31) form a locknut pair;
and the cotter pin (6) is used for penetrating the limiting hole I (42) and the limiting hole II (52).
2. The bolt-up locking device according to claim 1, wherein:
the fastening thread pair and the anti-loosening thread pair are opposite in rotation direction.
3. The bolt-up locking device according to claim 1, wherein:
the central axes of the fastening internal thread (11), the connecting hole I (21), the connecting hole II (32), the anti-loosening external thread (31), the fastening external thread (41) and the anti-loosening internal thread (51) are overlapped.
4. The bolt-up locking device according to claim 1, wherein:
and the limiting holes I (42) and II (52) are coincident with the central axis of the cotter pin (6).
5. The bolt-up locking device according to claim 1, wherein:
the diameters of the connecting holes I (21) and II (32) are larger than the diameter of the screw thread of the fastening bolt (4) by 1mm-2mm.
6. The bolt-up locking device according to claim 1, wherein:
the diameter of the cotter pin (6) is smaller than the diameters of the limiting hole I (42) and the limiting hole II (52) by 0.5mm-1mm.
7. The bolt-up locking device according to claim 1, wherein:
after the anti-loose nut is fastened, the bottom of the counter bore of the anti-loose nut (5) is pressed on a nut of the fastening bolt (4), and a preset gap is reserved between the outer edge of the anti-loose nut (5) and the connecting plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311113042.1A CN117072543A (en) | 2023-08-31 | 2023-08-31 | A bolt tightening and anti-loosening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311113042.1A CN117072543A (en) | 2023-08-31 | 2023-08-31 | A bolt tightening and anti-loosening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117072543A true CN117072543A (en) | 2023-11-17 |
Family
ID=88707909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311113042.1A Pending CN117072543A (en) | 2023-08-31 | 2023-08-31 | A bolt tightening and anti-loosening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117072543A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08105424A (en) * | 1994-10-06 | 1996-04-23 | Sanyu Sekkei:Kk | Locking metal fitting for bolt or nut |
| US6019556A (en) * | 1998-12-23 | 2000-02-01 | University Of South Florida | Locking fastener assembly |
| CN111120495A (en) * | 2019-11-19 | 2020-05-08 | 潍柴动力股份有限公司 | Lock Bolt Assembly |
| CN114076142A (en) * | 2021-01-28 | 2022-02-22 | 钟振贤 | Anti-loosening screw adopting double-thread nut |
| CN114439838A (en) * | 2020-11-03 | 2022-05-06 | 上海开恒光岳机械制造有限公司 | A locking bolt |
| CN220668036U (en) * | 2023-08-31 | 2024-03-26 | 徐州徐工矿业机械有限公司 | Bolt connection locking device |
-
2023
- 2023-08-31 CN CN202311113042.1A patent/CN117072543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08105424A (en) * | 1994-10-06 | 1996-04-23 | Sanyu Sekkei:Kk | Locking metal fitting for bolt or nut |
| US6019556A (en) * | 1998-12-23 | 2000-02-01 | University Of South Florida | Locking fastener assembly |
| CN111120495A (en) * | 2019-11-19 | 2020-05-08 | 潍柴动力股份有限公司 | Lock Bolt Assembly |
| CN114439838A (en) * | 2020-11-03 | 2022-05-06 | 上海开恒光岳机械制造有限公司 | A locking bolt |
| CN114076142A (en) * | 2021-01-28 | 2022-02-22 | 钟振贤 | Anti-loosening screw adopting double-thread nut |
| CN220668036U (en) * | 2023-08-31 | 2024-03-26 | 徐州徐工矿业机械有限公司 | Bolt connection locking device |
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Effective date of registration: 20250730 Address after: No. 169, Heping Avenue, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Applicant after: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Country or region after: China Applicant after: Shaanxi Shenyan Coal Co., Ltd. of national energy Group Address before: No. 169, Heping Avenue, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Applicant before: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Country or region before: China |