CN212928473U - Thread anti-loosening device - Google Patents
Thread anti-loosening device Download PDFInfo
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- CN212928473U CN212928473U CN202020983359.6U CN202020983359U CN212928473U CN 212928473 U CN212928473 U CN 212928473U CN 202020983359 U CN202020983359 U CN 202020983359U CN 212928473 U CN212928473 U CN 212928473U
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Abstract
The utility model belongs to the technical field of mechanical connection structure. A screw thread anti-loosening device is used for bolt anti-loosening connection between at least two structural components and comprises a fastening screw thread section, an anti-loosening screw thread section, a first nut, a second nut, a sleeve and a limiting piece, wherein the fastening screw thread section and the anti-loosening screw thread section are sequentially arranged at the end part of a bolt; the first nut is arranged on the fastening thread section in a matching and meshing manner; the second nut is arranged on the anti-loosening thread section in a matching and meshing mode; the sleeve is sleeved outside the first nut and the second nut in a matching manner, and the sleeve limits the first nut and the second nut to synchronously rotate in the same direction; the limiting piece limits the sleeve to be separated from the first nut and the second nut. This application structural design is reasonable, and it is convenient to dismantle, and the dismouting process need not to carry out welding jobs, has improved work efficiency, has alleviateed workman's the amount of labour.
Description
Technical Field
The utility model belongs to the technical field of mechanical connection structure, concretely relates to screw thread locking device.
Background
Threaded connection is a common connection mode in the mechanical industry and is widely applied to multiple fields, such as the shield field. When the shield machine is used for tunneling a high-strength hard rock stratum, the hob is stressed greatly and is also subjected to strong impact in the rock breaking process, and the phenomenon of thread loosening easily occurs under the severe working condition. For example, in a normal pressure cutter head, a connecting bolt is arranged between a hobbing cutter cylinder and a cutter holder; and a tension bolt for fixing the hob in the shield conventional cutterhead. After the bolts are loosened, the continuous tunneling cannot be realized.
At present, in a construction site, in order to prevent threads from loosening, a destructive anti-loosening method is often adopted, namely, a bolt and a nut are connected together in a welding mode respectively, the operation process of the anti-loosening method for the threads is complex, and when the bolt is disassembled, a welding part needs to be planed at first, so that the labor capacity of workers is increased, and in addition, the anti-loosening mode easily causes the bolt and the nut to be incapable of being repeatedly used.
Disclosure of Invention
The utility model discloses the purpose is to the problem that above-mentioned exists and not enough, provides a screw thread locking device, and its structural design is reasonable, and it is convenient to dismantle, and the dismouting process need not to carry out welding operation, has improved work efficiency, has alleviateed workman's the amount of labour.
In order to realize the purpose, the adopted technical scheme is as follows:
a thread lock for a bolt lock connection between at least two structural members, comprising:
fastening a thread section;
the fastening thread section and the anti-loosening thread section are sequentially arranged at the end part of the bolt, the thread turning directions of the fastening thread section and the anti-loosening thread section are opposite, and the nominal diameter of the fastening thread section is larger than that of the anti-loosening thread section;
a first nut matingly engaged with the fastening thread segment;
the second nut is arranged on the anti-loosening threaded section in a matched and meshed mode;
the sleeve is sleeved outside the first nut and the second nut in a matching manner and limits the first nut and the second nut to synchronously rotate in the same direction; and
the limiting piece limits the sleeve to be separated from the first nut and the second nut.
According to the utility model discloses screw thread locking device, preferably, the locating part is the split pin, the bolt tip is provided with the pinhole.
According to the utility model discloses screw thread locking device preferably, still includes first gasket and second gasket, first gasket sets up between first nut and the structural component, the second gasket sets up between telescopic outer tip and the split pin.
According to the utility model discloses screw thread locking device preferably, still includes the third gasket, the third gasket sets up between first nut and the second nut.
According to the utility model discloses screw thread anti loosening device, preferably, the outer hexagonal size of first nut and second nut is the same, the hole cross-section of sleeve is regular hexagon; or
According to the utility model discloses screw thread locking device, preferably, the outer hexagonal size of first nut is greater than the outer hexagonal size of second nut, the sleeve includes first district section and the second district section that corresponds with first nut and second nut respectively, just the hole cross-section of first district section and second district section is regular hexagon.
According to the utility model discloses screw thread locking device, preferably, fastening thread section is the corotation screw thread, locking thread section is the derotation screw thread.
By adopting the technical scheme, the beneficial effects are as follows:
the utility model discloses to the not hard up problem that connecting bolt easily appears, adopt the locking method of pure mechanical type, structural design is reasonable, and it is convenient to dismantle, and the dismouting process need not to carry out welding operation, has improved work efficiency, has alleviateed workman's the amount of labour.
In the assembling process, the first nut is matched with the fastening thread section to realize conventional locking and fastening, so that the stable connection between structural components is guaranteed; the second nut combines the telescopic setting with locking screw section, can realize the synchronous locking of first nut and second nut, reaches locking purpose.
The utility model provides a setting of gasket can ensure the laminating degree between each part, ensures whole assembly structure's stability, improves whole assembly structure's performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is an assembly structure schematic diagram of a thread locking device according to the embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion I in fig. 1.
Fig. 3 is an enlarged view of a-a in fig. 2.
Fig. 4 is according to the utility model discloses screw thread locking device's split structure sketch map.
Number in the figure:
110 is a first part, 120 is a second part;
200 is a bolt, 210 is a fastening thread section, 220 is a locking thread section, and 230 is a pin hole;
310 is a first nut, 320 is a second nut;
Detailed Description
The embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for describing various elements of the present invention, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience of describing the present invention, and not that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.
Referring to fig. 1 to 4, the present application discloses a thread locking device for locking connection of a bolt between at least two structural components, such as a first part and a second part shown in fig. 1, in this embodiment, the first part and the second part are specifically a tool holder and a tool post, respectively, the thread locking device includes a fastening thread section 210, a locking thread section 220, a first nut 310, a second nut 320, a sleeve 402, and a limiting member, the fastening thread section 210 and the locking thread section 220 are sequentially disposed at an end of the bolt 200, the thread turning directions of the fastening thread section 210 and the locking thread section 220 are opposite, and a nominal diameter of the fastening thread section 210 is greater than a nominal diameter of the locking thread section 220; the first nut 310 is disposed in mating engagement with the fastening thread segment 210; the second nut 320 is arranged on the anti-loosening threaded section 220 in a matching and meshing manner; the sleeve 402 is sleeved outside the first nut 310 and the second nut 320 in a matching manner, and the sleeve 402 limits the first nut 310 and the second nut 320 to synchronously rotate in the same direction; the retainer limits the sleeve 402 from disengaging the first nut 310 and the second nut 320.
As shown in fig. 2 and 4, the position limiter in this embodiment is a cotter pin 401, and the end of the bolt is provided with a pin hole 230, so that the cotter pin limits the outer end of the sleeve to prevent the sleeve from being separated. Other structural forms can also be adopted, for example, the limiting member adopts a locking screw, a corresponding screw hole is arranged between the sleeve and the first nut or between the sleeve and the second nut, and the locking screw is used for locking and fixing.
Further, in order to increase the acting area between the structural members and improve the performance of the assembly structure, the present embodiment is further provided with a first gasket 403, a second gasket 404 and a third gasket 405, wherein the first gasket 403 is arranged between the first nut 310 and the structural member; in order to prevent the sleeve 402 from falling off after the cotter 401 is deformed under a force, a second gasket 404 is arranged between the outer end of the sleeve 402 and the cotter 401; third gasket 405 sets up between first nut 310 and second nut 320 for fix a position, avoid the clearance between first nut and the second nut too big, be more convenient for ensure each screw locking device's uniformity, can make the locking performance of the two better, avoid having the movement clearance between the two.
The first nut 310 and the second nut 320 in this embodiment have the same outer hexagonal dimensions, and the cross section of the inner hole of the sleeve 402 is a regular hexagon; it is also possible to set the outer hexagonal dimension of the first nut 310 to be larger than the outer hexagonal dimension of the second nut 320, in which case the sleeve 402 includes a first section and a second section corresponding to the first nut 310 and the second nut 320, respectively, and the inner bore cross-sections of the first section and the second section are both regular hexagons.
In order to facilitate the fastening operation, the fastening thread section 210 in this embodiment is a forward-rotation thread, which facilitates the force application operation, and the direction of the bolt is the same as that of a conventional bolt, and the anti-loosening thread section 220 is a reverse-rotation thread, and after the second nut 320 is tightened, the direction of the outer hexagon which needs to be adjusted in the reverse direction is the same as that of the outer hexagon of the first nut 310, which facilitates the assembly of the sleeve and realizes the anti-loosening.
During the assembling work, the first gasket and the first nut are sleeved on the bolt, the first nut is screwed, the third gasket and the second nut are sleeved, the second nut is screwed in a loosening direction by an angle theta (theta is less than 60 degrees), so that the outer hexagon of the second nut is adjusted to correspond to the first nut, finally, the sleeve and the second gasket are sleeved, the split pin is inserted, and the fastening and the assembling are completed.
The anti-loosening principle of this application is: because the sleeve is simultaneously sleeved on the outer hexagonal surfaces of the first nut and the second nut, the first nut and the second nut are ensured to rotate along the same direction, and the anti-loosening purpose of the threads is achieved because the thread turning directions of the first nut and the second nut are opposite.
While the above description has described in detail the preferred embodiments for carrying out the invention, it should be understood that these embodiments are presented by way of example only, and are not intended to limit the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art in light of the teachings of the present disclosure, and such modifications are intended to be within the scope of the present disclosure.
Claims (6)
1. A thread lock for a bolt lock connection between at least two structural members, comprising:
fastening a thread section;
the fastening thread section and the anti-loosening thread section are sequentially arranged at the end part of the bolt, the thread turning directions of the fastening thread section and the anti-loosening thread section are opposite, and the nominal diameter of the fastening thread section is larger than that of the anti-loosening thread section;
a first nut matingly engaged with the fastening thread segment;
the second nut is arranged on the anti-loosening threaded section in a matched and meshed mode;
the sleeve is sleeved outside the first nut and the second nut in a matching manner and limits the first nut and the second nut to synchronously rotate in the same direction; and
the limiting piece limits the sleeve to be separated from the first nut and the second nut.
2. The threaded anti-loosening device of claim 1 wherein the retaining member is a cotter pin and the bolt end is provided with a pin hole.
3. The thread anti-loosening apparatus of claim 2, further comprising a first washer disposed between the first nut and the structural member and a second washer disposed between the outer end of the sleeve and the cotter pin.
4. The thread anti-loosening apparatus of any of claims 1-3, further comprising a third washer disposed between the first nut and the second nut.
5. The threaded anti-loosening device of claim 1, wherein the first nut and the second nut have the same outer hexagonal dimensions, and the cross section of the inner hole of the sleeve is a regular hexagon; or
The outer hexagonal dimension of the first nut is larger than that of the second nut, the sleeve comprises a first section and a second section which correspond to the first nut and the second nut respectively, and the cross sections of inner holes of the first section and the second section are regular hexagons.
6. The thread anti-loosening device of claim 1, wherein the fastening thread section is a forward thread and the anti-loosening thread section is a reverse thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020983359.6U CN212928473U (en) | 2020-06-02 | 2020-06-02 | Thread anti-loosening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020983359.6U CN212928473U (en) | 2020-06-02 | 2020-06-02 | Thread anti-loosening device |
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| Publication Number | Publication Date |
|---|---|
| CN212928473U true CN212928473U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020983359.6U Active CN212928473U (en) | 2020-06-02 | 2020-06-02 | Thread anti-loosening device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700728A (en) * | 2021-05-25 | 2021-11-26 | 北京工业大学 | Detachable double-thread clamping type locknut |
| CN114251343A (en) * | 2021-12-22 | 2022-03-29 | 广西大学 | Novel anti-loosening device for railway hump braking rail |
| CN114526379A (en) * | 2022-03-02 | 2022-05-24 | 冀州中意复合材料股份有限公司 | Air pipe joint and construction method |
| CN115076204A (en) * | 2022-05-31 | 2022-09-20 | 鄂尔多斯应用技术学院 | Fastener for aerospace |
-
2020
- 2020-06-02 CN CN202020983359.6U patent/CN212928473U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700728A (en) * | 2021-05-25 | 2021-11-26 | 北京工业大学 | Detachable double-thread clamping type locknut |
| CN114251343A (en) * | 2021-12-22 | 2022-03-29 | 广西大学 | Novel anti-loosening device for railway hump braking rail |
| CN114526379A (en) * | 2022-03-02 | 2022-05-24 | 冀州中意复合材料股份有限公司 | Air pipe joint and construction method |
| CN115076204A (en) * | 2022-05-31 | 2022-09-20 | 鄂尔多斯应用技术学院 | Fastener for aerospace |
| CN115076204B (en) * | 2022-05-31 | 2023-12-26 | 鄂尔多斯应用技术学院 | Fastener for aerospace |
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