CN110985513A - Check bolt and check bolt assembly - Google Patents
Check bolt and check bolt assembly Download PDFInfo
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- CN110985513A CN110985513A CN201911159621.3A CN201911159621A CN110985513A CN 110985513 A CN110985513 A CN 110985513A CN 201911159621 A CN201911159621 A CN 201911159621A CN 110985513 A CN110985513 A CN 110985513A
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- 230000003044 adaptive effect Effects 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
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- 238000004080 punching Methods 0.000 description 1
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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
- 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
- F16B39/028—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of an auxiliary bolt or threaded element whose action provokes the deformation of the main bolt or nut and thereby its blocking
Abstract
The invention relates to a check bolt and a check bolt assembly, wherein the check bolt comprises a bolt head and a screw rod; the bolt head is arranged at one end of the screw and is used for being matched with a matched screwing tool to apply torque to the anti-loosening bolt; an expansion cavity is arranged on the end face of one end of the screw rod, which is far away from the bolt head, and a slot which is radially communicated with the screw rod is arranged on the cavity wall of the expansion cavity; the expansion cavity is used for the head of the expansion screw to enter and is matched with the conical head of the expansion screw, so that the corresponding section of the screw rod is radially expanded when the expansion screw is screwed down; a clamping boss is arranged on the wall of the expansion cavity, and the clamping boss forms a stop step surface facing the bolt head; the stop step surface is used for being matched with the expansion screw moving towards the bolt head and the head of the expansion screw passing through the clamping boss in a stop mode so as to prevent the expansion screw from outwards withdrawing, so that the expansion screw cannot withdraw from the expansion cavity, the expansion cavity of the anti-loosening bolt is always in a radially expanded expansion state, and the anti-loosening bolt is guaranteed to have a better anti-loosening effect.
Description
Technical Field
The invention belongs to the field of fasteners, and particularly relates to a check bolt and a check bolt assembly.
Background
The anti-loose performance of the fastener is always an important research index in the field of fasteners, at present, a plurality of anti-loose forms exist, but most of the anti-loose technologies are nut anti-loose technologies, and the common technologies comprise nut end face punching point riveting, gluing on threads, matching a hexagon slotted nut with a split pin, using a stop washer, serially connecting a steel wire, a double nut, using a spring washer, a closing self-locking nut, a nylon insert nut and the like. At present, the anti-loosening forms of the closing-in self-locking nut and the nylon insert nut are widely used in the aerospace field, but the friction force of a thread pair in the anti-loosening form of the nut is large, and the moment is quickly attenuated after the nut is repeatedly disassembled and assembled, so that the anti-loosening performance of the nut is greatly reduced, and the nut cannot be used on parts which are repeatedly disassembled.
In the prior art, chinese utility model patent as CN207879811U discloses a locking type theftproof bolt if grant notice number discloses, the installation cavity has been seted up in the screw rod of bolt, locking spare twists on the internal thread of installation cavity through its external screw thread, the tip at locking spare is equipped with the locking head of round platform shape, the lower extreme of screw rod is equipped with the tight portion that rises, a plurality of slot has been seted up to the circumference of the tight portion that rises, the inner cone of locking head matched with round platform shape is seted up to the inner wall of the tight portion that rises, it makes its rebound to twist the locking head soon, the radial expansion of the tight portion that rises, locking effect has, when needing to dismantle the bolt, reverse twist soon the locking head, drive locking head resets, thereby make the nut of rotation on the screw rod can withdraw from the screw rod.
However, in the anti-loosening anti-theft bolt, the anti-loosening element is screwed into the mounting cavity of the screw rod through the threaded structure, when the anti-loosening bolt is in a vibration environment, the threaded connection between the anti-loosening element and the mounting cavity may be loosened, which causes the anti-loosening element to move downward and release the radial expansion of the tightening part, thereby reducing the anti-loosening effect of the whole anti-loosening anti-theft bolt.
Disclosure of Invention
The invention aims to provide a check bolt, which aims to solve the technical problem that the check effect of a check bolt is reduced due to the fact that a check piece of the check bolt in the prior art is easily vibrated by the outside because the check piece is screwed in a screw; the invention also provides a check bolt assembly comprising the check bolt.
The anti-loose bolt adopts the following technical scheme:
the anti-loosening bolt comprises a bolt head and a screw rod; the bolt head is arranged at one end of the screw rod and is used for being matched with a matched screwing tool to apply torque to the anti-loosening bolt; the end face of one end of the screw, which is far away from the bolt head, is provided with an expansion cavity, and the cavity wall of the expansion cavity is provided with a slot which is radially communicated with the screw; the expansion cavity is used for the head of the expansion screw to enter and is matched with the conical head of the expansion screw, so that the corresponding section of the screw rod is radially expanded when the expansion screw is screwed down; a clamping boss is arranged on the wall of the expansion cavity, and the clamping boss forms a stop step surface facing the bolt head; the stop step surface is used for being in stop fit with the expansion screw moving towards the bolt head and the head of the expansion screw passing through the clamping boss so as to prevent the expansion screw from outwards withdrawing.
The invention has the beneficial effects that: the end, far away from the bolt head, of the screw rod is provided with the expansion cavity, and the wall of the expansion cavity is provided with the open slot, so that the radial expansion after the head of the expansion screw is installed in the expansion cavity is facilitated, after the head of the expansion screw passes over the clamping boss in the expansion cavity, the head of the expansion screw is in stop fit with the clamping boss towards the stop step surface of the bolt head, the expansion screw cannot exit from the expansion cavity, the expansion cavity of the anti-loose bolt is in a radially expanded expansion state all the time, and the anti-loose bolt is guaranteed to have a better anti-loose effect.
Furthermore, the expansion cavity is divided into an expansion holding section and a guide section in the axial direction of the screw rod, and the guide section is arranged on one side of the expansion holding section, which is far away from the bolt head; the expansion holding section is provided with an adaptive inner wall, and the shape of the adaptive inner wall is used for being matched with the conical head of the corresponding expansion screw, so that the corresponding section of the screw rod is in a radial expansion state under the jacking of the expansion screw; the diameter of one end of the guide section, which is close to the expansion holding section, is smaller than that of one end of the expansion holding section, which is far away from the bolt head; the stop step surface is formed by the end surface of one end of the guide section close to the expansion holding section.
Has the advantages that: the guide section is used for guiding the expansion screw to more conveniently enter the expansion cavity, and the expansion keeping section is matched with the conical head of the expansion screw so that the expansion cavity is in a radially expanded expansion state; the clamping boss is located at the transition position of the guide section and the expansion holding section so as to facilitate the formation of the clamping boss.
Furthermore, the stop step surface is an inclined surface, and one side of the stop step surface close to the central axis of the screw rod inclines towards the direction far away from the bolt head.
Has the advantages that: the stop step surface is an inclined surface which is inclined towards the direction far away from the bolt head, so that the head of the expansion screw can more conveniently slide through the clamping boss after passing through the clamping boss, the expansion screw is prevented from not smoothly passing through the clamping boss when being installed into the clamping boss, and the head of the expansion screw can conveniently pass through the clamping boss and is in stop fit with the stop step surface.
Furthermore, the guide section is a conical surface, and the diameter of one end of the guide section close to the bolt head is smaller than the diameter of one end of the guide section far away from the bolt head.
Has the advantages that: the tapered surface with the gradually reduced inner diameter facilitates guiding the tapered head of the expansion screw gradually into the expansion cavity.
Furthermore, a blind hole is formed in the end part, far away from the bolt head, of the screw rod, and the blind hole comprises a threaded section and a unthreaded hole section; the thread section is used for being in mutual thread screwing fit with the expansion screw; the unthreaded hole section is arranged on one side, far away from the bolt head, of the threaded section, and the expansion cavity is formed by the unthreaded hole section.
The anti-loose bolt assembly adopts the following technical scheme:
the check bolt assembly comprises a check bolt and an expansion screw; the anti-loosening bolt comprises a bolt head and a screw rod; (ii) a The bolt head is arranged at one end of the screw rod and is used for being matched with a matched screwing tool to apply torque to the anti-loosening bolt; the end face of one end of the screw, which is far away from the bolt head, is provided with an expansion cavity, and the cavity wall of the expansion cavity is provided with a slot which is radially communicated with the screw; the expansion cavity is used for the head of the expansion screw to enter and is matched with the conical head of the expansion screw, so that the corresponding section of the screw rod is radially expanded when the expansion screw is screwed down; a clamping boss is arranged on the wall of the expansion cavity, and the clamping boss forms a stop step surface facing the bolt head; the stop step surface is used for being in stop fit with the expansion screw moving towards the bolt head and the head of the expansion screw passing through the clamping boss so as to prevent the expansion screw from outwards withdrawing.
The invention has the beneficial effects that: the end, far away from the bolt head, of the screw rod is provided with the expansion cavity, and the wall of the expansion cavity is provided with the open slot, so that the radial expansion after the head of the expansion screw is installed in the expansion cavity is facilitated, after the head of the expansion screw passes over the clamping boss in the expansion cavity, the head of the expansion screw is in stop fit with the clamping boss towards the stop step surface of the bolt head, the expansion screw cannot exit from the expansion cavity, the expansion cavity of the anti-loose bolt is in a radially expanded expansion state all the time, and the anti-loose bolt is guaranteed to have a better anti-loose effect.
Furthermore, the expansion cavity is divided into an expansion holding section and a guide section in the axial direction of the screw rod, and the guide section is arranged on one side of the expansion holding section, which is far away from the bolt head; the expansion holding section is provided with an adaptive inner wall, and the shape of the adaptive inner wall is used for being matched with the conical head of the corresponding expansion screw, so that the corresponding section of the screw rod is in a radial expansion state under the jacking of the expansion screw; the diameter of one end of the guide section, which is close to the expansion holding section, is smaller than that of one end of the expansion holding section, which is far away from the bolt head; the stop step surface is formed by the end surface of one end of the guide section close to the expansion holding section.
Has the advantages that: the guide section is used for guiding the expansion screw to more conveniently enter the expansion cavity, and the expansion keeping section is matched with the conical head of the expansion screw so that the expansion cavity is in a radially expanded expansion state; the clamping boss is located at the transition position of the guide section and the expansion holding section so as to facilitate the formation of the clamping boss.
Furthermore, the stop step surface is an inclined surface, and one side of the stop step surface close to the central axis of the screw rod inclines towards the direction far away from the bolt head.
Has the advantages that: the stop step surface is an inclined surface which is inclined towards the direction far away from the bolt head, so that the head of the expansion screw can more conveniently slide through the clamping boss after passing through the clamping boss, the expansion screw is prevented from not smoothly passing through the clamping boss when being installed into the clamping boss, and the head of the expansion screw can conveniently pass through the clamping boss and is in stop fit with the stop step surface.
Furthermore, the guide section is a conical surface, and the diameter of one end of the guide section close to the bolt head is smaller than the diameter of one end of the guide section far away from the bolt head.
Has the advantages that: the tapered surface with the gradually reduced inner diameter facilitates guiding the tapered head of the expansion screw gradually into the expansion cavity.
Furthermore, a blind hole is formed in the end part, far away from the bolt head, of the screw rod, and the blind hole comprises a threaded section and a unthreaded hole section; the thread section is used for being in mutual thread screwing fit with the expansion screw; the unthreaded hole section is arranged on one side, far away from the bolt head, of the threaded section, and the expansion cavity is formed by the unthreaded hole section.
Drawings
FIG. 1 is a cross-sectional view of the check bolt of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of the expansion screw;
FIG. 5 is a cross-sectional view of the lockbolt assembly of the present invention;
fig. 6 is a partial view of fig. 5 at B.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 1-a screw; 2-expanding the cavity; 21-expansion holding section; 22-a guide segment; 3-slotting; 4-clamping the boss; 41-stop step surface; 5-a thread section; 6-expansion screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
An embodiment 1 of the check bolt of the present invention is shown in fig. 1 to 3.
The check bolt comprises a bolt head and a screw rod 1, wherein the bolt head is arranged at one end of the screw rod 1, the bolt head is used for being matched with a screwing tool of the matching to apply torque to the check bolt, and the bolt head can be of any head type structure such as a hexagon head, a dodecagonal head, an inner hexagonal cylinder head, an inner hexagonal countersunk head, an inner hexagonal cylinder head and an inner hexagonal countersunk head.
As shown in fig. 1, a blind hole is formed in the end face of one end, far away from the bolt head, of the screw rod 1, the blind hole comprises a thread section 5 and a unthreaded hole section, the unthreaded hole section is arranged on one side, far away from the bolt head, of the thread section 5, the thread section 5 is in threaded connection with an expansion screw 6, the unthreaded hole section forms an expansion cavity 2, far away from one end, far away from the bolt head, of the screw rod 1, a groove 3 which is through along the radial direction is formed in the cavity wall of the expansion cavity 2, the groove 3 is 4, and the 4 grooves 3 are uniformly arranged along the circumferential direction of the.
The expansion cavity 2 comprises an expansion keeping section 21 and a guiding section 22, the guiding section 22 is arranged on one side of the expansion keeping section 21 far away from the bolt head, the expansion keeping section 21 and the guiding section 22 are both conical surfaces, the diameter of one end, close to the bolt head, of the expansion keeping section 21 is smaller than that of one end, far away from the bolt head, of the expansion keeping section, and the diameter of one end, close to the bolt head, of the guiding section 22 is smaller than that of one end, far away from the bolt head, of the guiding section; the conicity b of the guide section 22 is 30 degrees, and is used for guiding the conical head of the expansion screw 6 to gradually enter the expansion cavity 2, in addition, the conical angle b of the guide section can also take other values about 30 degrees, and the conical angle b of the guide section is smaller than the conical angle c of the conical head of the expansion screw.
The expansion holding section 21 is provided with an adaptive inner wall matched with the conical head of the expansion screw 6, and the adaptive inner wall is used for enabling the part, corresponding to the expansion cavity 2, on the screw rod 1 to be in a radial expansion state after the conical head of the expansion screw 6 enters the expansion holding section 21. In this embodiment, the expansion screw 6 is a countersunk head screw, the conical angle c of the tapered head portion of the expansion screw 6 is 90 degrees, and the conical angle a of the expansion holding section 21 is 89 degrees; in other embodiments, the taper angle c of the tapered head of the expansion screw 6 may be larger than the taper angle a of the expansion holding section 21, so that the tapered head of the expansion screw can expand the expansion holding section radially outward.
The inner wall of the expansion cavity 2 is provided with a clamping boss 4, and the clamping boss 4 forms a stop step surface 41 facing the bolt head. The diameter of the end of the guide section 22 close to the expansion-retaining section 21 is smaller than the diameter of the end of the expansion-retaining section remote from the bolt head, so that the stop step surface 41 is formed by the end surface of the guide section 22 close to the end of the expansion-retaining section 21. The stop step surface 41 is an inclined surface, and one side of the stop step surface 41 close to the central axis of the screw rod 1 inclines towards the direction far away from the bolt head, so that the head of the expansion screw 6 can more conveniently slide over the clamping boss after passing over the clamping boss 4, the expansion screw is prevented from not smoothly passing over the clamping boss when being installed in the clamping boss, and the head of the expansion screw can conveniently pass over the clamping boss 4 and is in mutually stop fit with the stop step surface 41.
When the expansion screw 6 is installed in the anti-loose bolt, the thread part of the expansion screw 6 is screwed into the thread section 5 of the blind hole, the conical head of the expansion screw 6 enters the guide section 22 to gradually enter the expansion cavity 2, the expansion cavity 2 is gradually jacked open until the conical head of the expansion screw 6 crosses the clamping boss 4 in the expansion cavity 2, the conical head of the expansion screw 6 and the stopping step surface 41 are in mutually stopping fit, the expansion screw cannot be withdrawn from the expansion cavity, and the expansion cavity of the anti-loose bolt is always in a radially expanded expansion state, so that the anti-loose bolt is ensured to have a better anti-loose effect. Embodiment 2 of the present invention, this embodiment is different from embodiment 1 in that the expansion chamber in embodiment 1 includes the guide section and the expansion-retaining section, whereas in this embodiment, only the expansion-retaining section is provided in the expansion chamber.
In embodiment 4 of the present invention, the difference between this embodiment and embodiment 1 is that in embodiment 1, the stop step surface is an inclined surface; in this embodiment, the stop step surface may be a plane parallel to the end surface of the screw rod.
An embodiment of a lockbolt assembly of the present invention is shown in fig. 4 to 6.
The lockbolt assembly includes a lockbolt and a tightening screw, and an embodiment of the lockbolt in the lockbolt assembly, that is, the lockbolt described in any one of embodiments 1 to 4 of the above lockbolt, is not specifically described here.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. The anti-loosening bolt comprises a bolt head and a screw rod;
the bolt head is arranged at one end of the screw rod and is used for being matched with a matched screwing tool to apply torque to the anti-loosening bolt;
the end face of one end of the screw, which is far away from the bolt head, is provided with an expansion cavity, and the cavity wall of the expansion cavity is provided with a slot which is radially communicated with the screw;
the expansion cavity is used for the head of the expansion screw to enter and is matched with the conical head of the expansion screw, so that the corresponding section of the screw rod is radially expanded when the expansion screw is screwed down;
it is characterized in that the preparation method is characterized in that,
a clamping boss is arranged on the wall of the expansion cavity, and the clamping boss forms a stop step surface facing the bolt head;
the stop step surface is used for being in stop fit with the expansion screw moving towards the bolt head and the head of the expansion screw passing through the clamping boss so as to prevent the expansion screw from outwards withdrawing.
2. The check bolt according to claim 1, wherein the expansion chamber is divided into an expansion holding section and a guide section in the axial direction of the screw, the guide section being provided on a side of the expansion holding section remote from the bolt head;
the expansion holding section is provided with an adaptive inner wall, and the shape of the adaptive inner wall is used for being matched with the conical head of the corresponding expansion screw, so that the corresponding section of the screw rod is in a radial expansion state under the jacking of the expansion screw;
the diameter of one end of the guide section, which is close to the expansion holding section, is smaller than that of one end of the expansion holding section, which is far away from the bolt head;
the stop step surface is formed by the end surface of one end of the guide section close to the expansion holding section.
3. The check bolt according to claim 2, wherein the stop step surface is an inclined surface, and a side of the stop step surface close to the central axis of the screw rod is inclined in a direction away from the bolt head.
4. A locking bolt as claimed in claim 2 or 3, wherein the guide section is a tapered surface, and the diameter of the end of the guide section adjacent the bolt head is smaller than the diameter of the end of the guide section remote from the bolt head.
5. The anti-loose bolt according to any one of claims 1 to 3, wherein the end of the screw rod far away from the bolt head is provided with a blind hole, and the blind hole comprises a threaded section and a unthreaded hole section;
the thread section is used for being in mutual thread screwing fit with the expansion screw;
the unthreaded hole section is arranged on one side, far away from the bolt head, of the threaded section, and the expansion cavity is formed by the unthreaded hole section.
6. The check bolt assembly comprises a check bolt and an expansion screw;
the anti-loosening bolt comprises a bolt head and a screw rod;
the bolt head is arranged at one end of the screw rod and is used for being matched with a matched screwing tool to apply torque to the anti-loosening bolt;
the end face of one end of the screw, which is far away from the bolt head, is provided with an expansion cavity, and the cavity wall of the expansion cavity is provided with a slot which is radially communicated with the screw;
the expansion cavity is used for the head of the expansion screw to enter and is matched with the conical head of the expansion screw, so that the corresponding section of the screw rod is radially expanded when the expansion screw is screwed down;
it is characterized in that the preparation method is characterized in that,
a clamping boss is arranged on the wall of the expansion cavity, and the clamping boss forms a stop step surface facing the bolt head;
the stop step surface is used for being in stop fit with the expansion screw moving towards the bolt head and the head of the expansion screw passing through the clamping boss so as to prevent the expansion screw from outwards withdrawing.
7. The lockbolt assembly of claim 6 wherein the expansion chamber is divided in the axial direction of the screw into an expansion retaining section and a guide section, the guide section being provided on a side of the expansion retaining section remote from the bolt head;
the expansion holding section is provided with an adaptive inner wall, and the shape of the adaptive inner wall is used for being matched with the conical head of the corresponding expansion screw, so that the corresponding section of the screw rod is in a radial expansion state under the jacking of the expansion screw;
the diameter of one end of the guide section, which is close to the expansion holding section, is smaller than that of one end of the expansion holding section, which is far away from the bolt head;
the stop step surface is formed by the end surface of one end of the guide section close to the expansion holding section.
8. The lockbolt assembly of claim 7 wherein the stop step surface is a sloped surface, and a side of the stop step surface near the central axis of the threaded rod slopes away from the bolt head.
9. A lockbolt assembly as claimed in claim 7 or claim 8 wherein the guide section is a tapered surface, the diameter of the end of the guide section adjacent the bolt head being less than the diameter of the end of the guide section remote from the bolt head.
10. The anti-loose bolt assembly according to any one of claims 6 to 8, characterized in that the end of the screw rod away from the bolt head is provided with a blind hole, and the blind hole comprises a threaded section and a unthreaded section;
the thread section is used for being in mutual thread screwing fit with the expansion screw;
the unthreaded hole section is arranged on one side, far away from the bolt head, of the threaded section, and the expansion cavity is formed by the unthreaded hole section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159621.3A CN110985513B (en) | 2019-11-22 | 2019-11-22 | Check bolt and check bolt assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159621.3A CN110985513B (en) | 2019-11-22 | 2019-11-22 | Check bolt and check bolt assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110985513A true CN110985513A (en) | 2020-04-10 |
| CN110985513B CN110985513B (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911159621.3A Active CN110985513B (en) | 2019-11-22 | 2019-11-22 | Check bolt and check bolt assembly |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1188611A (en) * | 1915-03-12 | 1916-06-27 | Dan O Gentes | Locking bolt and nut. |
| GB2341654B (en) * | 1998-09-15 | 2000-11-22 | Barry Littlewood | Improvements relating to threaded securing devices |
| CN2432378Y (en) * | 2000-03-19 | 2001-05-30 | 李晓军 | Loosing-proof maintenance-free fixed bolt |
| US20070201965A1 (en) * | 2006-02-28 | 2007-08-30 | Barry Littlewood | Threaded fastening systems |
| CN202251364U (en) * | 2011-08-29 | 2012-05-30 | 丁鑫 | Anti-theft bolt subassembly |
| CN202468640U (en) * | 2011-12-30 | 2012-10-03 | 东莞地龙纸业有限公司 | Self-locking check bolt |
| CN205677957U (en) * | 2016-06-19 | 2016-11-09 | 詹桥生 | Dual anti-loosening bolt |
| CN207879811U (en) * | 2018-01-30 | 2018-09-18 | 海盐储鑫紧固件厂 | A kind of anti-theft bolt of Anti-loose |
-
2019
- 2019-11-22 CN CN201911159621.3A patent/CN110985513B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1188611A (en) * | 1915-03-12 | 1916-06-27 | Dan O Gentes | Locking bolt and nut. |
| GB2341654B (en) * | 1998-09-15 | 2000-11-22 | Barry Littlewood | Improvements relating to threaded securing devices |
| CN2432378Y (en) * | 2000-03-19 | 2001-05-30 | 李晓军 | Loosing-proof maintenance-free fixed bolt |
| US20070201965A1 (en) * | 2006-02-28 | 2007-08-30 | Barry Littlewood | Threaded fastening systems |
| CN202251364U (en) * | 2011-08-29 | 2012-05-30 | 丁鑫 | Anti-theft bolt subassembly |
| CN202468640U (en) * | 2011-12-30 | 2012-10-03 | 东莞地龙纸业有限公司 | Self-locking check bolt |
| CN205677957U (en) * | 2016-06-19 | 2016-11-09 | 詹桥生 | Dual anti-loosening bolt |
| CN207879811U (en) * | 2018-01-30 | 2018-09-18 | 海盐储鑫紧固件厂 | A kind of anti-theft bolt of Anti-loose |
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| CN110985513B (en) | 2021-08-27 |
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