CN212177633U - Anti-loosening combined bolt - Google Patents
Anti-loosening combined bolt Download PDFInfo
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- CN212177633U CN212177633U CN202020656201.8U CN202020656201U CN212177633U CN 212177633 U CN212177633 U CN 212177633U CN 202020656201 U CN202020656201 U CN 202020656201U CN 212177633 U CN212177633 U CN 212177633U
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Abstract
The utility model discloses an anti-loose combined bolt, which comprises a bolt body, a first nut, a screw sleeve and a second nut; the bolt body comprises a bolt head and a bolt rod; the outer surface of the bolt rod is provided with a bolt external thread; a first internal thread matched with the external thread of the bolt is arranged on the inner surface of the first nut; the inner surface of the screw sleeve is provided with a screw internal thread matched with the bolt external thread; the outer surface of the screw sleeve is provided with external screw threads; a second internal thread matched with the external thread of the screw is arranged on the inner surface of the second nut; the screw bolt external thread and the screw external thread are opposite in rotation direction. The utility model discloses the cooperation and bolt external screw thread, the screw external screw thread of well first nut, turnbuckle, second nut revolve to opposite setting, have all played the effect that prevents first nut not hard up to can play better locking effect.
Description
Technical Field
The utility model belongs to the technical field of the fastener, concretely relates to locking combination bolt that moves.
Background
Bolts are mechanical parts used to fasten two or more members together, and are usually used in conjunction with nuts, which are fixed by applying a pre-load to the nuts. However, due to mechanical vibration or other external forces, the bolt and the nut are easily loosened or even fall off, so that the fastening effect on the component is lost.
At present, the measures for preventing the bolt from loosening comprise friction looseness prevention by adding an elastic washer, mechanical looseness prevention by adopting a cotter pin and the like, bonding looseness prevention by adopting glue bonding and the like. The anti-loosening effect of the friction anti-loosening mode adopting the elastic washer is poor; mechanical looseness prevention by using cotter pins and the like and bonding looseness prevention by using glue are achieved by limiting relative rotation between the nut and the bolt, and the two looseness prevention modes cause inconvenience in disassembly and even damage to the bolt or the nut, so that reusability of the bolt and the nut is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing an anti-loosening combined bolt.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a looseness-preventing combined bolt comprises a bolt body, a first nut, a screw sleeve and a second nut; the bolt body comprises a bolt head and a bolt rod;
the outer surface of the bolt rod is provided with a bolt external thread;
a first internal thread matched with the external thread of the bolt is arranged on the inner surface of the first nut;
the inner surface of the screw sleeve is provided with a screw internal thread matched with the bolt external thread; the outer surface of the screw sleeve is provided with external screw threads;
a second internal thread matched with the external thread of the screw is arranged on the inner surface of the second nut;
the screw bolt external thread and the screw external thread are opposite in rotation direction.
Preferably, the bolt head is cylindrical or regular hexagonal prism.
Preferably, the bolt body is a full-tooth bolt.
Preferably, a plurality of groups of bayonet tangent planes are arranged on the outer side face of one end of the screw sleeve, and each group of bayonet tangent planes are arranged oppositely.
Preferably, the thickness of the first nut is consistent with that of the second nut.
Preferably, the cross section of the outer side surface of the first nut is consistent with the cross section of the outer side surface of the second nut in size.
Preferably, the upper portion of the bolt rod is provided with a limiting part for preventing the screw sleeve from falling off from the bolt rod.
Preferably, the limiting piece is a limiting pin;
the upper part of the bolt rod is provided with a plurality of through limiting holes used for installing limiting pins along the axial direction, and the central axis of each limiting hole is vertical to the central axis of the bolt rod;
the upper portion of the screw sleeve is provided with a through positioning hole used for being matched with the limiting pin, and the central axis of the positioning hole is perpendicular to the central axis of the screw sleeve.
Preferably, one end of the limiting pin is fixedly provided with an anti-falling end socket; and the other end of the limiting pin is in threaded connection with an anti-drop nut.
The utility model has the advantages that:
(1) the anti-loosening combined bolt increases the pretightening force through the matching of the first nut, the screw sleeve and the second nut, and plays a role in preventing the first nut from loosening to a certain extent; meanwhile, when the first nut has a loosening trend under the action of vibration or external force, the friction force between the contact surface of the second nut and the first nut promotes the second nut to generate a movement trend consistent with the loosening direction of the first nut, and the external threads of the bolt and the screw are arranged in opposite rotating directions, so that the loosening direction of the first nut is consistent with the tightening direction of the second nut, namely when the first nut has a loosening trend, the second nut can generate a self-tightening effect due to an opposite thread structure, and the first nut is prevented from loosening; consequently, the cooperation and the bolt external screw thread of first nut, turnbuckle, second nut, screw external screw thread turn to opposite setting in this application, have all played the effect that prevents first nut not hard up to can play better locking effect.
(2) The utility model discloses all adopt threaded connection between each subassembly in the locking assembling bolt that moves, install on the one hand, dismantle simple easy operation, on the other hand reuse rate is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural view of a locking combination bolt of the present invention in embodiment 1;
fig. 2 is a schematic structural view of a screw socket according to the present invention in embodiment 1;
fig. 3 is an assembly schematic view of the anti-loosening combination bolt of the invention in embodiment 1;
fig. 4 is a schematic structural view of the anti-loosening combination bolt of the present invention in embodiment 2;
fig. 5 is an assembly schematic view of the anti-loosening combination bolt of the invention in embodiment 2;
wherein:
01-a first member, 02-a second member;
1-a bolt body, 101-a bolt head, 102-a bolt rod, 103-a bolt external thread, 104-a limiting hole, 2-a first nut, 3-a screw sleeve, 301-a screw external thread, 302-a bayonet section, 303-a positioning hole, 4-a second nut, 5-a limiting pin, 501-an anti-falling end head and 502-an anti-falling nut.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "bottom" and "top" are used to indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship between the components or elements of the present invention, and are not specific to any component or element of the present invention, and should not be construed as limiting the present invention.
In the present invention, terms such as "connected" and "connected" should be understood in a broad sense, and may be either fixedly connected or integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
The present invention will be further explained with reference to the drawings and examples.
Example 1:
as shown in fig. 1, a locking combination bolt comprises a bolt body 1, a first nut 2, a screw sleeve 3 and a second nut 4; the bolt body 1 includes a bolt head 101 and a bolt shank 102;
the outer surface of the bolt rod 102 is provided with a bolt external thread 103;
a first internal thread matched with the bolt external thread 103 is arranged on the inner surface of the first nut 2;
the inner surface of the screw sleeve 3 is provided with a screw internal thread matched with the bolt external thread 103; the outer surface of the screw sleeve 3 is provided with external screw threads 301;
a second internal thread matched with the screw external thread 301 is arranged on the inner surface of the second nut 4;
the bolt external thread 103 and the screw external thread 301 are opposite in rotation direction.
Preferably, the bolt head 101 is cylindrical or regular hexagonal prism.
Preferably, the bolt body 1 is a full-tooth bolt.
Preferably, as shown in fig. 2, a plurality of sets of bayonet tangent planes 302 are arranged on the outer side surface of one end of the screw sleeve 3, and each set of bayonet tangent planes 302 are arranged oppositely; the snap section 302 serves as a wrench tightening action surface.
Preferably, the thickness of the first nut 2 corresponds to the thickness of the second nut 4.
Preferably, the cross section of the outer side surface of the first nut 2 is the same as the cross section of the outer side surface of the second nut 4.
A locking combination bolt that moves, its embodiment mode is as follows:
when the first member 01 and the second member 02 in fig. 3 need to be fixedly connected, firstly, the bolt rod 102 is inserted through the threaded hole on the first member 01 and the second member 02, and then the first nut 2 is screwed on the bolt rod 102 and is tightened, so that the first member 01 and the second member 02 are clamped and fixed between the bolt head 101 and the first nut 2; then, the screw sleeve 3 is screwed on the bolt rod 102 and is screwed tightly, so that the bottom end face of the screw sleeve 3 is pressed against the top end face of the first nut 2, the screw sleeve 3 and the first nut 2 form a double-nut structure, the pretightening force is increased to a certain extent, and the first nut 2 can be prevented from loosening; and finally, the second nut 4 is screwed on the screw sleeve 3 and screwed down, so that the bottom end surface of the second nut 4 is pressed against the top end surface of the first nut 2, the screw sleeve 3 and the second nut 4 are matched, the pretightening force is increased by the matching of the first nut 2, the screw sleeve 3 and the second nut 4, and the first nut 2 is further prevented from loosening.
When the first nut 2 tends to loosen under the action of vibration or external force, because the bottom end surface of the second nut 4 is pressed on the top end surface of the first nut 2, friction force exists between the contact surface of the second nut 4 and the first nut 1, and the friction force prompts the second nut 4 to generate a movement tendency consistent with the loosening direction of the first nut 2; the screwing directions of the bolt external thread 103 and the screw external thread 301 are opposite, so that the loosening direction of the first nut 2 is consistent with the screwing direction of the second nut 4; therefore, when the first nut 2 tends to loosen, the second nut 4 will have a self-tightening effect due to the opposite thread structure, thereby preventing the first nut 2 from loosening.
Example 2:
as shown in fig. 4 to 5, in the embodiment 1, a limiting member for preventing the screw socket 3 from falling off from the bolt shaft 102 is provided on the upper portion of the bolt shaft 102.
Preferably, the limiting piece is a limiting pin 5;
a plurality of penetrating limiting holes 104 for mounting limiting pins 5 are formed in the upper part of the bolt rod 102 along the axial direction, and the central axis of each limiting hole 104 is perpendicular to the central axis of the bolt rod 102;
the upper portion of the screw sleeve 3 is provided with a through positioning hole 303 used for being matched with the limiting pin 5, and the central axis of the positioning hole 303 is perpendicular to the central axis of the screw sleeve 3.
Preferably, one end of the limit pin 5 is fixedly provided with an anti-falling end 501; the other end of the limit pin 5 is in threaded connection with an anti-drop nut 502.
When the first member 01 and the second member 02 in fig. 5 need to be fixedly connected, firstly, the bolt rod 102 is inserted through the threaded hole on the first member 01 and the second member 02, and then the first nut 2 is screwed on the bolt rod 102 and is tightened, so that the first member 01 and the second member 02 are clamped and fixed between the bolt head 101 and the first nut 2; then, installing a second nut 4 at the bottom of the screw sleeve 3, then screwing the screw sleeve 3 on the bolt rod 102, aligning a positioning hole 303 on the screw sleeve 3 with the nearest limit hole 104 when the bottom end of the screw sleeve 3 is close to the upper end face of the first nut 2, inserting a limit pin 5 into the aligned positioning hole 303 and limit hole 104, and screwing an anti-falling nut 502 on the other end of the limit pin 5; finally, the second nut 4 is rotated so that the second nut 4 abuts against the first nut 2.
In embodiment 2, when the first nut 2 tends to loosen, the second nut 4 will have a self-tightening effect due to the opposite thread structure, thereby preventing the first nut 2 from loosening.
In the embodiment 2, the limit pin 5 is arranged, so that the screw sleeve 3 and the bolt rod 102 are fixed together, and a better anti-loosening effect can be achieved; meanwhile, due to the arrangement of the limiting pin 5, the screw sleeve 3, the first nut 2 and the second nut 4 cannot fall off under the action of vibration or external force, the parts are prevented from falling off to cause loss of the parts, and the loss caused by the fact that the parts fall off to completely separate the first component 01 and the second component 02 is avoided.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the present invention, and those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without inventive labor are still within the scope of the present invention.
Claims (9)
1. A looseness-preventing combined bolt is characterized by comprising a bolt body, a first nut, a screw sleeve and a second nut; the bolt body comprises a bolt head and a bolt rod;
the outer surface of the bolt rod is provided with a bolt external thread;
a first internal thread matched with the external thread of the bolt is arranged on the inner surface of the first nut;
the inner surface of the screw sleeve is provided with a screw internal thread matched with the bolt external thread; the outer surface of the screw sleeve is provided with external screw threads;
a second internal thread matched with the external thread of the screw is arranged on the inner surface of the second nut;
the screw bolt external thread and the screw external thread are opposite in rotation direction.
2. The anti-loosening combination bolt according to claim 1, wherein the bolt head is cylindrical or regular hexagonal prism shaped.
3. A locking jack bolt according to claim 1 wherein said bolt body is a full-tooth bolt.
4. The anti-loosening combination bolt as defined in claim 1, wherein a plurality of sets of bayonet cut surfaces are provided on the outer side surface of one end of the screw boss, each set of bayonet cut surfaces being disposed opposite to each other.
5. The anti-loosening compound bolt according to claim 1, wherein the first nut has a thickness corresponding to a thickness of the second nut.
6. The anti-loosening compound bolt according to claim 1, wherein the cross-section of the outer side surface of the first nut is identical in size to the cross-section of the outer side surface of the second nut.
7. The anti-loosening assembling bolt according to claim 1, wherein the upper portion of the bolt shank is provided with a stopper for preventing the boss from being removed from the bolt shank.
8. The anti-loosening combination bolt according to claim 7, wherein the retainer is a retainer pin;
the upper part of the bolt rod is provided with a plurality of through limiting holes used for installing limiting pins along the axial direction, and the central axis of each limiting hole is vertical to the central axis of the bolt rod;
the upper portion of the screw sleeve is provided with a through positioning hole used for being matched with the limiting pin, and the central axis of the positioning hole is perpendicular to the central axis of the screw sleeve.
9. The anti-loosening combination bolt as claimed in claim 8, wherein one end of the limit pin is fixedly provided with an anti-loosening end socket; and the other end of the limiting pin is in threaded connection with an anti-drop nut.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196571 | 2020-02-24 | ||
| CN2020201965718 | 2020-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212177633U true CN212177633U (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020656201.8U Active CN212177633U (en) | 2020-02-24 | 2020-04-27 | Anti-loosening combined bolt |
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| Country | Link |
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| CN (1) | CN212177633U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482156A (en) * | 2021-07-31 | 2021-10-08 | 赵施艳 | Earthquake-resistant energy-consuming building node structure |
| CN113482155A (en) * | 2021-07-31 | 2021-10-08 | 赵施艳 | Assembly type building node connection structure |
| CN113638955A (en) * | 2021-08-24 | 2021-11-12 | 合肥巨步机械科技有限公司 | Anti-loosening bolt and using method |
-
2020
- 2020-04-27 CN CN202020656201.8U patent/CN212177633U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482156A (en) * | 2021-07-31 | 2021-10-08 | 赵施艳 | Earthquake-resistant energy-consuming building node structure |
| CN113482155A (en) * | 2021-07-31 | 2021-10-08 | 赵施艳 | Assembly type building node connection structure |
| CN113638955A (en) * | 2021-08-24 | 2021-11-12 | 合肥巨步机械科技有限公司 | Anti-loosening bolt and using method |
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