CN217002596U - Anti-drop bolt - Google Patents
Anti-drop bolt Download PDFInfo
- Publication number
- CN217002596U CN217002596U CN202220921356.9U CN202220921356U CN217002596U CN 217002596 U CN217002596 U CN 217002596U CN 202220921356 U CN202220921356 U CN 202220921356U CN 217002596 U CN217002596 U CN 217002596U
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- CN
- China
- Prior art keywords
- screw
- falling
- screw rod
- thread
- filler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000945 filler Substances 0.000 claims abstract description 35
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 description 10
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model provides an anti-falling bolt which comprises a bolt body, wherein the bolt body comprises a bolt head and a screw rod, an anti-falling groove is formed in the outer wall of the screw rod along the axial direction of the screw rod, the depth of the anti-falling groove is larger than the thread height of the screw rod, anti-falling fillers are arranged in the anti-falling groove, and the height of the anti-falling fillers from the bottom of the anti-falling groove to the top of the thread is not smaller than the height from the bottom of the anti-falling groove to the middle diameter of the thread. The utility model has the advantage of effectively preventing the bolt from withdrawing after the pretightening force disappears.
Description
Technical Field
The utility model relates to the field of mechanical accessories, in particular to an anti-falling bolt.
Background
When the existing bolt is fastened, in order to ensure stable connection, torsion is generally applied to the bolt through devices such as a torque wrench and the like, so that sufficient pretightening force is generated to ensure reliable connection; although the bolt can guarantee reliable connection after torsion and avoid appearing smooth tooth scheduling problem simultaneously, in case the pine takes off (the pretightning force disappears), the bolt can get into the free rotation state of circumferential direction very fast, can take off rapidly along with vibrations under some special operating mode and directly cause the separation that drops of bolt, therefore it still can prevent the bolt that withdraws from by oneself under the vibration state to need to design a section after the pretightning force disappears.
SUMMERY OF THE UTILITY MODEL
Based on the above problems, the present invention aims to provide an anti-drop bolt which can effectively prevent the bolt from backing out after the pretightening force disappears.
Aiming at the problems, the following technical scheme is provided: the utility model provides an anticreep bolt, includes the bolt body, the bolt body includes spiral shell head and screw rod, the screw rod outer wall is equipped with the anticreep groove of seting up along its axial direction, the thread tooth height that the degree of depth is greater than the screw rod is seted up in the anticreep groove, the anticreep inslot is equipped with the anticreep and packs, the anticreep is packed from anticreep groove tank bottom up to the ascending height in thread crest side and is not less than the height between anticreep groove tank bottom to the screw thread pitch diameter.
In the structure, the anti-falling filler is installed after the anti-falling groove is formed in the axial direction of the screw, so that the screw is screwed in and then is extruded with the anti-falling filler to generate friction force, after the pretightening force disappears, the screw is prevented from retreating outwards by utilizing the extrusion friction force between the anti-falling filler and the internal thread, and full-section anti-falling in the whole screwing section of the screw is realized.
The utility model is further provided that the anti-dropping filler is a nylon strip or a red copper strip or a brass strip.
In the above structure, the anti-dropping filler is preferably a nylon strip.
The utility model is further provided that the section of the anti-falling filler is square or round or D-shaped.
In the structure, when the section of the bottom of the anti-falling groove is semicircular, the section of the anti-falling filler is preferably circular; when the section of the bottom of the anti-falling groove is a plane, the section of the anti-falling filler is preferably D-shaped.
The utility model is further arranged in such a way that one end of the screw rod, which is far away from the screw head, is provided with a stable section with the diameter smaller than the small diameter of the screw thread of the screw rod, the outer wall of the stable section is provided with jacks which are arranged in an equal number with the anti-falling grooves and are connected one to one, and the tail end of the anti-falling filler is inserted into the jacks.
In the above-mentioned structure, the one end that the spiral shell head was kept away from to the anticreep filler inserts in the jack, can pack for the anticreep and provide the preliminary fixation, guarantees that the screw rod guarantees that the position that the anticreep was packed at the screw in initial stage is in the fixed state.
The utility model is further configured such that the jack axis is perpendicular to or oblique to the stabilizing section axis.
In the structure, the axis of the insertion hole and the axis of the stable section are inclined, and the vertexes of the insertion hole and the stable section are back to the screw head.
The utility model is further arranged in that the end surface of one end of the screw head facing the screw rod is provided with a plurality of supporting teeth which are uniformly distributed along the circumferential direction of the screw head, and the supporting teeth are arranged in a radial shape on the end surface of the screw head; and a gasket is arranged at the joint of the screw head and the screw rod.
In the structure, the friction between the gasket and the pad is reduced by reducing the friction force, so that time-saving assembly can be ensured, the beat is fast, and the automatic assembly of the robot is more favorably realized.
The utility model is further set that one end of the screw rod facing the screw head is provided with a necking with the outer diameter smaller than the major diameter of the thread, the gasket is positioned at the necking, the gasket is provided with a through hole matched with the necking, and the inner diameter of the through hole is not larger than the major diameter of the thread.
In the structure, after the gasket is arranged on the necking neck, the thread is processed on the screw rod in a thread rolling mode, so that the crest diameter of the thread is increased, and the gasket is prevented from being separated.
The utility model is further arranged in that one end of the screw head facing the screw rod is provided with a supporting part with an outer contour larger than that of the screw head, and the supporting teeth are positioned on the end surface of the supporting part.
In the above structure, the stress on the screw head can be effectively dispersed.
The utility model has the beneficial effects that: the anti-falling filler is installed after the anti-falling groove is formed in the axial direction of the screw rod, so that the screw rod is screwed in and then is extruded with the anti-falling filler to generate friction force, after the pretightening force disappears, the screw rod is prevented from moving outwards by the aid of the extrusion friction force between the anti-falling filler and the internal thread, and full-section anti-falling in the whole screwing section of the screw rod is achieved.
Drawings
Fig. 1 is a schematic overall perspective view of the present invention.
Fig. 2 is a schematic diagram of a full-section explosion structure of the utility model.
FIG. 3 is a cross-sectional view of the screw according to the present invention.
The reference numbers in the figures mean: 10-screw head; 101-support teeth; 102-a support; 11-a screw; 111-anti-drop groove; 112-necking down; 12-anti-run filler; 13-a stabilization section; 131-insertion holes; 14-a gasket; 141-through holes.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
Referring to fig. 1 to 3, the anti-drop bolt shown in fig. 1 to 3 includes a bolt body, the bolt body includes a bolt head 10 and a screw 11, an anti-drop groove 111 provided along an axial direction of the outer wall of the screw 11 is provided, a thread height of the screw 11 is greater than a depth of the anti-drop groove 111, an anti-drop filler 12 is provided in the anti-drop groove 111, and a height of the anti-drop filler 12 from a groove bottom of the anti-drop groove 111 to a thread crest direction is not less than a height between the groove bottom of the anti-drop groove 111 and a thread pitch diameter.
In the above structure, the anti-separation groove 111 is formed along the axial direction of the screw 11 and then the anti-separation filler 12 is installed, so that the screw 11 is screwed in and then the internal thread adapted to the screw 11 is extruded with the anti-separation filler 12 to generate friction force, and therefore, after the pre-tightening force disappears, the extrusion friction force between the anti-separation filler 12 and the internal thread is utilized to prevent the screw 11 from moving outwards, and the whole anti-separation in the whole screwing section of the screw 11 is realized.
In this embodiment, the anti-dropping filler 12 is a nylon strip, a red copper strip or a brass strip.
In the above structure, the anti-separation filler 12 is preferably a nylon strip.
In this embodiment, the section of the anti-dropping filler 12 is square, circular or D-shaped.
In the above structure, when the section of the bottom of the anti-falling groove 111 is semicircular, the section of the anti-falling filler 12 is preferably circular; when the section of the bottom of the anti-falling groove 111 is a plane, the section of the anti-falling filler 12 is preferably D-shaped, and one side of the plane of the D-shaped section abuts against the bottom of the anti-falling groove 111.
In this embodiment, one end of the screw rod 11, which is far away from the screw head 10, is provided with a stabilizing section 13 with a diameter smaller than the small diameter of the thread of the screw rod 11, the outer wall of the stabilizing section 13 is provided with insertion holes 131 which are arranged in an equal number and connected with the anti-falling grooves 111 one to one, and the tail end of the anti-falling filler 23 is inserted into the insertion holes 131.
In the above structure, one end of the anti-separation filler 12 far from the screw head 10 is inserted into the insertion hole 131, so that the anti-separation filler 12 can be pre-fixed, and the screw 11 is ensured to be in a fixed state at the position where the anti-separation filler 12 is ensured at the initial screwing-in stage.
In this embodiment, the axis of the insertion hole 131 is perpendicular to the axis of the stabilizing section 13 or inclined to the axis of the stabilizing section 13.
In the above structure, the axis of the insertion hole 131 is inclined to the axis of the stabilizing section 13, and the vertexes thereof face away from the screw head 10.
In this embodiment, the end surface of one end of the screw head 10 facing the screw 11 is provided with a plurality of support teeth 101 uniformly distributed along the circumferential direction of the screw head 10, and the support teeth 101 are radially arranged on the end surface of the screw head 10; a gasket 14 is arranged at the joint of the screw head 10 and the screw rod 11.
In the structure, the friction between the gasket 14 and the robot is reduced by reducing the friction force, so that time-saving assembly and high-speed beat can be ensured, and the robot is more favorable for realizing automatic assembly.
In this embodiment, a neck 112 with an outer diameter smaller than the major diameter of the thread is disposed at one end of the screw rod 11 facing the screw head 10, the gasket 14 is disposed at the neck 112, the gasket 14 is provided with a through hole 141 adapted to the neck 112, and the inner diameter of the through hole 141 is not larger than the major diameter of the thread.
In the above structure, after the gasket 14 is mounted on the neck 112, the screw 11 is threaded by a thread rolling method, so that the crest diameter of the thread is increased, and the gasket 14 is prevented from falling out.
In this embodiment, a supporting portion 102 having an outer contour larger than that of the screw head 10 is disposed at one end of the screw head 10 facing the screw 11, and the supporting teeth 101 are disposed on an end surface of the supporting portion 102.
In the above structure, the stress on the screw head 10 can be effectively dispersed.
The utility model has the beneficial effects that: the anti-falling packing 12 is installed after the anti-falling groove 111 is formed in the axial direction of the screw rod 11, so that the screw rod 11 is screwed in, the internal thread matched with the screw rod 11 is extruded with the anti-falling packing 12 to generate friction force, after the pretightening force disappears, the extrusion friction force between the anti-falling packing 12 and the internal thread is utilized to prevent the screw rod 11 from retreating outwards, and the whole-section anti-falling in the whole screwing section of the screw rod 11 is realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications assumed in the above are also considered to be within the scope of the present invention.
Claims (8)
1. The utility model provides an anticreep bolt, includes the bolt body, the bolt body includes spiral shell head and screw rod, its characterized in that: the outer wall of the screw is provided with an anti-falling groove which is arranged along the axial direction of the screw, the anti-falling groove is provided with a thread height which is greater than the screw in depth, anti-falling filler is arranged in the anti-falling groove, and the height of the anti-falling filler from the bottom of the anti-falling groove to the top of the thread is not less than the height from the bottom of the anti-falling groove to the middle diameter of the thread.
2. The anti-drop bolt according to claim 1, characterized in that: the anti-falling filler is a nylon strip or a red copper strip or a brass strip.
3. The anti-drop bolt according to claim 1 or 2, characterized in that: the section of the anti-falling filler is square or round or D-shaped.
4. The anti-drop bolt according to claim 1, characterized in that: the screw rod is kept away from the one end of spiral shell head and is equipped with the diameter and be less than the stable section of the screw thread path of screw rod, the stable section outer wall is equipped with the jack that sets up with anticreep groove etc. and link to each other one to one, anticreep filler is terminal to be inserted and to be located in the jack.
5. The anti-drop bolt according to claim 4, characterized in that: the axis of the jack is perpendicular to the axis of the stabilizing section or inclined to the axis of the stabilizing section.
6. The anti-drop bolt according to claim 1, characterized in that: the end surface of one end of the screw head facing the screw rod is provided with a plurality of supporting teeth which are uniformly distributed along the circumferential direction of the screw head, and the supporting teeth are radially arranged on the end surface of the screw head; and a gasket is arranged at the joint of the screw head and the screw rod.
7. The anti-drop bolt according to claim 6, characterized in that: the screw rod is equipped with the necking down that the external diameter is less than the big footpath of screw thread towards the one end of spiral shell head, the gasket is located necking down department, the gasket is equipped with the through-hole with the necking down adaptation, the through-hole internal diameter is not more than the big footpath of screw thread.
8. The anti-drop bolt according to claim 6 or 7, characterized in that: the screw head is provided with a supporting part with an outer contour larger than that of the screw head at one end facing the screw rod, and the supporting teeth are positioned on the end face of the supporting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220921356.9U CN217002596U (en) | 2022-04-20 | 2022-04-20 | Anti-drop bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220921356.9U CN217002596U (en) | 2022-04-20 | 2022-04-20 | Anti-drop bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002596U true CN217002596U (en) | 2022-07-19 |
Family
ID=82378218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220921356.9U Expired - Fee Related CN217002596U (en) | 2022-04-20 | 2022-04-20 | Anti-drop bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002596U (en) |
-
2022
- 2022-04-20 CN CN202220921356.9U patent/CN217002596U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 311200 no.448, Tonghui South Road, Xintang street, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU XIAOSHAN TECHNICIAN College Address before: 311500 Tongjun street, Tonglu County, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU XIAOSHAN TECHNICIAN College |
|
| CP02 | Change in the address of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |