CN219712010U - Lock bolt - Google Patents
Lock bolt Download PDFInfo
- Publication number
- CN219712010U CN219712010U CN202321123481.6U CN202321123481U CN219712010U CN 219712010 U CN219712010 U CN 219712010U CN 202321123481 U CN202321123481 U CN 202321123481U CN 219712010 U CN219712010 U CN 219712010U
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- Prior art keywords
- hole
- bolt
- limiting pin
- sleeve
- bolt head
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- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Insertion Pins And Rivets (AREA)
Abstract
The utility model belongs to the technical field of machinery, and relates to a check bolt, which comprises the following components: the bolt head of the bolt is a hexagon socket screw bolt head, a limit pin is arranged on the bolt head of the bolt, and the limit pin is connected with a spring; by arranging the telescopic limiting pin in the bolt, the limiting pin is retracted into the bolt when the bolt is loosened by using the hexagonal wrench, after the bolt is screwed, the outer end of the limiting pin is outwards propped against the inner wall of the locking sleeve or is inserted into the inner hole of the second through hole from the first through hole, the locking is directly carried out when the limiting pin is inserted into the inner hole of the second through hole, and the locking is carried out when the limiting pin is propped against the inner wall of the locking sleeve, and the inner hole of the second through hole can still be inserted for locking after the bolt is loosened.
Description
Technical Field
The utility model belongs to the technical field of machinery, and relates to a check bolt.
Background
In the using process of the bolt, the working state of the fixed part, especially the bolt connecting structure of the vibration part, can cause the loosening condition of the bolt under the excitation of long-time vibration load, and the performance of the part is affected; the existing bolt structure cannot well prevent the problems.
Therefore, a lockbolt is needed to solve the above-mentioned problems.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: a lockbolt, comprising: the anti-loosening device comprises a bolt and an anti-loosening sleeve, wherein the bolt head of the bolt is screwed with a hexagonal hole, the outer contour of the bolt head of the bolt is cylindrical, the inner hole of the anti-loosening sleeve is in a shape of a second-order stepped hole with a large upper hole and a small lower hole, the hole diameter of the upper hole of the anti-loosening sleeve is larger than the diameter of the outer contour of the bolt head of the bolt, the hole diameter of the lower hole of the anti-loosening sleeve is smaller than the outer contour of the bolt head of the bolt, and the hole diameter of the lower hole of the anti-loosening sleeve is larger than the diameter of the screw part of the bolt;
the side wall of the bolt head of the bolt is provided with a first through hole parallel to the upper surface of the bolt head, the first through hole is communicated with a hexagonal hole in the bolt head of the bolt and the outer circumference of the bolt head, a cylindrical limiting pin is arranged in the first through hole, the limiting pin can slide back and forth along the length direction of the hole in the first through hole, the inner end of the limiting pin is connected with a spring stretching along the length direction of the limiting pin, the other end of the spring is tightly pressed in the bolt head of the bolt, and the outer end of the limiting pin stretches out from the first through hole from inside to outside after being subjected to the elasticity of the spring;
the hole wall of the upper hole of the inner hole of the anti-loose sleeve is provided with a second through hole parallel to the upper surface of the bolt head, the second through hole Kong Zina is outwards in a second-order step hole shape with a large inner hole and a small outer hole, the hole diameter of the inner hole of the second through hole is larger than the diameter of the limiting pin, the hole diameter of the second through hole Kong Waikong is smaller than the diameter of the limiting pin, and the hole depth of the inner hole of the second through hole is smaller than the pin length of the limiting pin;
during installation, the screw rod of bolt passes back threaded connection to the screw of being connected by the hole of locking cover, screws up the back, and the bolt compresses tightly the locking cover to the surface of being connected, and the outer end of spacer pin is from the outside pore wall of hole or the hole of inserting in the second through-hole on the locking cover hole of the outside spring-force back top of receiving of first through-hole.
Preferably, the first through hole is located in a vertical plane of one inner hexagonal side wall of the inner hexagonal hole of the bolt; therefore, interference influence of the limiting pin on the hexagonal wrench in tightness can be reduced.
More preferably, the limiting pin is provided with a groove along the length direction, the shape of the groove is matched with the outer contour of the hexagonal wrench, and the groove is flush with the vertical surface of the inner hexagonal hole of the bolt after the outer end of the limiting pin is completely retracted into the bolt, so that the hexagonal wrench can clamp the limiting pin when screwing the bolt, and the outer end of the limiting pin is prevented from being ejected out of the outer side wall of the bolt head of the bolt by the spring to influence screwing operation; the hexagonal wrench can limit the limiting pin on the bolt when in tightness so as not to influence the screwing or loosening operation.
More preferably, the first through hole is positioned in the hole bottom plane of the hexagonal hole in the bolt; the hexagonal wrench can better exert force when elasticity, and the end chamfer of hexagonal wrench can be more relaxed clamping stop pin simultaneously.
Preferably, 4 to 12 second through holes are arranged, and the second through holes are uniformly distributed on the outer circumference of the locking sleeve; the number of the second through holes is selected according to the control level of the loosening condition of the bolts, so that the loosening angle range of the bolts is limited from one twelfth circle to one quarter circle.
More preferably, 6 second through holes are formed; six holes are uniformly distributed, so that the bolts can be prevented from loosening by one sixth of a circle at most, the processing cost of more holes of the locking sleeve is reduced, and meanwhile, the strength of the loosening sleeve is improved.
Preferably, the radial section of the second through hole is a long hole along the vertical direction; the slot hole can adapt to the fact that the limiting pin can be inserted into the second through hole when the bolts are screwed down at different heights, and the bolts are prevented from loosening.
Preferably, the locking sleeve is also provided with a square backing plate, the bottom surface of the backing plate is overlapped with the bottom surface of the locking sleeve, the bottom surface of the backing plate is rough, the friction force between the backing plate and the surface of a connected piece can be improved, and the locking sleeve and the connected piece are prevented from generating relative displacement so as to lead to loosening of a bolt.
Preferably, when the bolts rotate to the hole positions to be aligned, the axes of the first through hole and the second through hole are positioned on the same straight line, and the same straight line ensures better looseness prevention performance.
The beneficial effects of the utility model are as follows:
according to the utility model, the telescopic limiting pin is arranged in the bolt, so that the limiting pin is retracted into the bolt when the bolt is loosened by the hexagonal wrench, after the bolt is screwed, the outer end of the limiting pin is outwards propped against the inner wall of the locking sleeve or is inserted into the inner hole of the second through hole from the first through hole, when the limiting pin is inserted into the inner hole of the second through hole, the locking is directly carried out, and when the limiting pin is propped against the inner wall of the locking sleeve, the bolt can still be inserted into the inner hole of the second through hole for locking after loosening, so that the occurrence of loosening of the bolt can be effectively prevented.
Drawings
FIG. 1 is a perspective view of a lockbolt;
FIG. 2 is a perspective view of a bolt;
FIG. 3 is a perspective view of the anti-loose sleeve;
FIG. 4 is an enlarged partial perspective view of a bolt;
FIG. 5 is an enlarged partial top view of the locking sleeve;
fig. 6 is a schematic view of a bolt locking mechanism.
1, a bolt; 2. a locking sleeve; 3. a first through hole; 4. a limiting pin; 5. a spring; 6. a second through hole; 7. a groove; 8. a backing plate.
Detailed Description
The following description of the related art will be made apparent to, and is not intended to limit the scope of, the embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 6, a lockbolt includes: the anti-loosening device comprises a bolt 1 and an anti-loosening sleeve 2, wherein the bolt head of the bolt 1 is screwed with a hexagonal hole, the outer contour of the bolt head of the bolt 1 is cylindrical, the anti-loosening sleeve 2 is cylindrical, the inner hole of the anti-loosening sleeve 2 is in a shape of a second-order stepped hole with a large upper hole and a small lower hole, the hole diameter of the upper hole of the anti-loosening sleeve 2 is larger than the diameter of the outer contour of the bolt head of the bolt 1, the hole diameter of the lower hole of the inner hole of the anti-loosening sleeve 2 is smaller than the outer contour of the bolt head of the bolt 1, and the hole diameter of the lower hole of the inner hole of the anti-loosening sleeve 2 is larger than the diameter of the screw part of the bolt 1;
the side wall of the bolt head of the bolt 1 is provided with a first through hole 3 parallel to the upper surface of the bolt head, the first through hole 3 is communicated with a hexagonal hole in the bolt head of the bolt 1 and the outer circumference of the bolt head, a cylindrical limiting pin 4 is arranged in the first through hole 3, the limiting pin 4 can slide back and forth along the length direction of the hole in the first through hole 3, the inner end of the limiting pin 4 is connected with a spring 5 stretching along the length direction of the limiting pin 4, the other end of the spring 5 is tightly pressed against the bolt head of the bolt 1, and the outer end of the limiting pin 4 stretches out from the first through hole 3 from inside to outside after being subjected to the elasticity of the spring;
the hole wall of the upper hole of the inner hole of the anti-loose sleeve 2 is provided with a second through hole 6 which is parallel to the upper surface of the bolt head, the second through hole 6 is in a second-order step hole shape with a large inner hole and a small outer hole from inside to outside, the aperture of the inner hole of the second through hole 6 is larger than the diameter of the limiting pin 4, the aperture of the outer hole of the second through hole 6 is smaller than the diameter of the limiting pin 4, and the hole depth of the inner hole of the second through hole 6 is smaller than the pin length of the limiting pin 4;
during installation, the screw rod of bolt 1 passes back threaded connection to the screw of being connected by the hole of locking cover 2, and after tightening, bolt 1 compresses tightly locking cover 2 to the surface of being connected, and the outer end of spacer pin 4 pushes up the pore wall of locking cover 2 hole or inserts in the hole of second through-hole 6 after outwards receiving the elasticity of spring from first through-hole 3.
Further, the first through hole 3 is located in the vertical plane of one inner hexagonal side wall of the inner hexagonal hole of the bolt 1; thus, interference influence of the limit pin 4 on the hexagonal wrench in tightness can be reduced.
Furthermore, a groove 7 is formed in the limiting pin 4 along the length direction, the shape of the groove 7 is matched with the outer contour of the hexagonal wrench, and the groove 7 is flush with the vertical surface of the inner hexagonal hole of the bolt 1 when the outer end of the limiting pin 4 is completely retracted into the bolt 1, so that the hexagonal wrench is clamped with the limiting pin 4 when the bolt 1 is screwed down, and the spring 5 is prevented from ejecting the outer end of the limiting pin 4 out of the outer side wall of the bolt head of the bolt 1 to influence the screwing down operation; the hexagonal wrench can limit the limiting pin 4 to the bolt 1 when in tightness so as not to influence the screwing or loosening operation.
Further, the first through hole 3 is positioned in the hole bottom plane of the hexagonal hole in the bolt 1; the hexagonal wrench can better exert force when elasticity, and the end chamfer of hexagonal wrench can be more relaxed clamping stop pin 4 simultaneously.
Further, 4 to 12 second through holes 6 are arranged, and the second through holes 6 are uniformly distributed on the outer circumference of the locking sleeve 2; the number of second through holes 6 is selected according to the control level of the loosening of the bolts, thereby limiting the loosening angle of the bolts 1 from one-twelfth to one-quarter of a turn.
Further, 6 second through holes 6 are formed; the six holes are uniformly distributed, so that the bolts 1 can be prevented from loosening by one sixth of a circle at most, the processing cost of the more holes of the locking sleeve 2 is reduced, and meanwhile, the strength of the loosening sleeve 2 is improved.
Further, the radial section of the second through hole 6 is a long hole along the vertical direction; the slot hole can adapt to the bolt 1 and can enable the limiting pin 4 to be inserted into the second through hole 6 when the bolt 1 is screwed down at different heights, so that the bolt is prevented from loosening.
Further, a square backing plate 8 is arranged outside the anti-loose sleeve 2, and the bottom surface of the backing plate 8 is overlapped with the bottom surface of the anti-loose sleeve 2; the bottom surface of the backing plate 8 is rough, so that the friction force between the backing plate 8 and the surface of a connected piece can be improved, and the looseness of the bolt 1 caused by the relative displacement between the locking sleeve 2 and the connected piece is prevented.
Further, when the bolt 1 rotates to the position where the holes are aligned, the axes of the first through hole 3 and the second through hole 6 are positioned on the same straight line, and the same straight line ensures better anti-loosening performance.
Examples
In this embodiment, the hole site structure is opened at bolt 1 head and is used for installing spacer pin 4 and spring 5, and after spacer pin 4 and spring 5 structure were packed into bolt 1 together, spacer pin 4's open position and bolt 1's hexagon socket head cap structure parallel and level can make the socket head cap sleeve of installation spanner insert behind bolt 1 like this to play the purpose that restriction spacer pin 4 removed, in the tight in-process of bolt 1 beat like this, spacer pin 4 can not influence the installation.
In this embodiment, the upper part of the locking sleeve 2 matched with the head of the bolt 1 is a cylindrical structure formed by two concentric circles, the second through holes 6 are of an upper grooving structure and are matched with the limiting pins 4 to limit, 6 second through holes 6 are arranged in the circumferential direction, and the included angle of the axes of the second through holes 6 is 60 degrees.
The installation process is that a limiting pin 4 and a spring 5 are firstly inserted into the head structure of a bolt 1, the opening structure of the limiting pin 4 is enabled to be level with the inner hexagonal hole position structure of the head structure of the bolt 1, and then an inner hexagonal socket is inserted into the bolt 1; inserting the bolt 1 into the anti-loose sleeve 2, performing the tightening operation of the bolt 1, removing the mounting sleeve (wrench) after the bolt 1 is tightened, and pressing the limiting pin 4 into the second through hole 6 under the action of a spring if the limiting pin 4 is just aligned with the second through hole 6 of the anti-loose sleeve 2 at the moment; if the limiting pin 4 is just not aligned with the second through hole 6, the tip structure of the limiting pin 4 is propped against the inner wall of the anti-loosening sleeve 2 under the action of the spring 5, when the bolt 1 is loosened and rotated, the limiting pin 4 is blocked into the hole after being aligned with the second through hole 6, so that the bolt 1 is prevented from being further loosened, and at the moment, the bolt is loosened for 1/6 circle at most.
The disassembly flow of this embodiment is as follows: firstly, the limiting pin 4 is propped against to enable the limiting pin 4 to return to the head of the bolt 1, the opening structure of the limiting pin 4 is flush with the inner hexagonal hole position structure of the head structure of the bolt 1, and then the bolt 1 is dismounted by inserting the inner hexagonal sleeve into the structure of the bolt 1.
In summary, the telescopic limiting pin is arranged in the bolt, so that the limiting pin is retracted into the bolt when the bolt is loosened by the hexagonal wrench, after the bolt is screwed, the outer end of the limiting pin is outwards propped against the inner wall of the locking sleeve or is inserted into the inner hole of the second through hole from the first through hole, the locking is directly carried out when the limiting pin is inserted into the inner hole of the second through hole, and the bolt can still be inserted into the inner hole of the second through hole for locking after the limiting pin is loosened when the limiting pin is propped against the inner wall of the locking sleeve, so that the locking device can effectively prevent the bolt from being loosened, and has wide application prospect.
It is emphasized that: the above embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (9)
1. A lockbolt, characterized in that: comprising the following steps: the anti-loosening device comprises a bolt (1) and an anti-loosening sleeve (2), wherein the bolt head of the bolt (1) is screwed by an inner hexagonal hole, the outer contour of the bolt head of the bolt (1) is cylindrical, the anti-loosening sleeve (2) is cylindrical, the inner hole of the anti-loosening sleeve (2) is in a second-order stepped hole shape with a large upper hole and a small lower hole, the hole diameter of the upper hole of the inner hole of the anti-loosening sleeve (2) is larger than the diameter of the outer contour of the bolt head of the bolt (1), the hole diameter of the lower hole of the inner hole of the anti-loosening sleeve (2) is smaller than the outer contour of the bolt head of the bolt (1), and the hole diameter of the lower hole of the inner hole of the anti-loosening sleeve (2) is larger than the diameter of a screw part of the bolt (1);
the novel bolt comprises a bolt head, and is characterized in that a first through hole (3) parallel to the upper surface of the bolt head is formed in the side wall of the bolt head of the bolt (1), the first through hole (3) is communicated with a hexagonal hole in the bolt head of the bolt (1) and the outer circumference of the bolt head, a cylindrical limiting pin (4) is arranged in the first through hole (3), the limiting pin (4) can slide back and forth along the longitudinal direction of the hole in the first through hole (3), a spring (5) stretching along the length direction of the limiting pin (4) is connected to the inner end of the limiting pin (4), the other end of the spring (5) is tightly pressed against the bolt head of the bolt (1), and the outer end of the limiting pin (4) stretches out from the first through hole (3) after being subjected to the elasticity of the spring (5);
the hole wall of the upper hole of the anti-loose sleeve (2) is provided with a second through hole (6) parallel to the upper surface of the bolt head, the second through hole (6) is in a second-order step hole shape with a large inner hole and a small outer hole from inside to outside, the hole diameter of the inner hole of the second through hole (6) is larger than the diameter of the limiting pin (4), the hole diameter of the outer hole of the second through hole (6) is smaller than the diameter of the limiting pin (4), and the hole depth of the inner hole of the second through hole (6) is smaller than the pin length of the limiting pin (4);
during installation, the screw rod of bolt (1) passes back threaded connection to the screw of being connected by the screw of lock sleeve (2), after screwing up, bolt (1) compresses tightly lock sleeve (2) to the surface of being connected, the outer end of spacer pin (4) is from first through-hole (3) outwards by the pore wall of hole on the hole of lock sleeve (2) or insert in the hole of second through-hole (6) behind the elasticity of spring (5).
2. A lockbolt according to claim 1, wherein the first through hole (3) is located in the vertical plane of one of the internal hexagonal side walls of the internal hexagonal hole of the bolt (1).
3. The lockbolt according to claim 2, wherein the limiting pin (4) is provided with a groove (7) along the length direction, the shape of the groove (7) is matched with the outer contour of the hexagonal wrench, the groove (7) is flush with the vertical surface of the inner hexagonal hole of the bolt (1) after the outer end of the limiting pin (4) is completely retracted into the bolt (1), so that the limiting pin (4) is blocked by the hexagonal wrench when the bolt (1) is screwed down, and the spring (5) is prevented from ejecting the outer end of the limiting pin (4) out of the outer side wall of the bolt head of the bolt (1) to influence screwing operation.
4. A lockbolt according to claim 2, wherein the first through hole (3) is located in the hole bottom plane of the hexagonal hole in the bolt (1).
5. A lockbolt according to claim 1, wherein the number of the second through holes (6) is 4 to 12, and the second through holes (6) are uniformly distributed on the outer circumference of the locksleeve (2).
6. A lockbolt according to claim 5, wherein the second through holes (6) are provided in 6.
7. A lockbolt according to claim 1, wherein the radial cross section of the second through hole (6) is in the shape of a long hole in the vertical direction.
8. The lockbolt according to claim 1, wherein the locksleeve (2) is further provided with a square base plate (8), and the bottom surface of the base plate (8) coincides with the bottom surface of the locksleeve (2).
9. A lockbolt according to claim 1, wherein the first through hole (3) and the second through hole (6) are aligned when the bolt (1) is rotated to the hole position, and the axes of the first through hole (3) and the second through hole (6) are positioned on the same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321123481.6U CN219712010U (en) | 2023-05-11 | 2023-05-11 | Lock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321123481.6U CN219712010U (en) | 2023-05-11 | 2023-05-11 | Lock bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219712010U true CN219712010U (en) | 2023-09-19 |
Family
ID=87981320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321123481.6U Active CN219712010U (en) | 2023-05-11 | 2023-05-11 | Lock bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219712010U (en) |
-
2023
- 2023-05-11 CN CN202321123481.6U patent/CN219712010U/en active Active
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