CN204284167U - Prevent loose type bolt - Google Patents
Prevent loose type bolt Download PDFInfo
- Publication number
- CN204284167U CN204284167U CN201420753326.7U CN201420753326U CN204284167U CN 204284167 U CN204284167 U CN 204284167U CN 201420753326 U CN201420753326 U CN 201420753326U CN 204284167 U CN204284167 U CN 204284167U
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- China
- Prior art keywords
- nut
- screw rod
- threads
- stepped shaft
- bolt
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- Expired - Fee Related
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Abstract
What the utility model proposed prevents loose type bolt from comprising stepped shaft screw rod and nut, and the front threads direction that the rear threads that in the screw thread on stepped shaft screw rod wherein, cross-sectional diameter is large is little with cross-sectional diameter is contrary; Nut comprises the first nut be screwed in rear threads and the second nut be screwed in front threads, and the surface that described first nut is relative with the second nut is respectively arranged with unidirectional inclined teeth.Two nut drivings in this bolt are on stepped shaft screw rod and after making the contact of two inclined teeth, two nuts can be fixed.
Description
Technical field
the utility model relates to a kind of bolt for connecting hoist walking track and crane end carriage.
Background technique
in the prior art, bolt is made up of screw rod and nut usually, screw rod is wherein provided with outside thread, and on nut, be provided with the internal thread that to match with the outside thread on screw rod, although utilize this kind of bolt parts can be connected by being screwed in screw rod upper cap nut, but due to screw rod being only provided with unidirectional screw thread, even if screw multiple nut on screw rod, because all nuts are also rotate along identical direction, so, even if the bolt of said structure with multiple nut screwing clamping on screw rod, its the machinery of fixing constantly producing in the process of vibrations, bolt also can shake along with the vibration of machinery, bolt is in the easy autorotation of vibrational state lower nut, thus the superstructure loosening causing it to connect.Bolt looseness brings certain influence can to undoubtedly connected parts, thus causes mechanical precision to decline, and may cause inconceivable consequence time serious.Cause mechanical failure for avoiding bolt looseness or lead to major accident, in the prior art, usual adopted spring washer increases the coupling mechanism force of nut, loosen again after preventing nut check, but because spring washer has certain intensity and endurance degree and limit of elasticity, namely there is strain limit in elastic washer self, fatigue limit and limit of elasticity, when the periodic vibration of the system be fastened by bolts in high strength, the gap of the elastic compensating that the packing ring as elastic element utilizes it intrinsic and the generation of elimination periodicity and stress, when vibration frequency and intensity exceed its strain limit, its anti-loosing effect will lose efficacy, this periodic vibrations easily cause metal fatigue again, if maintenance discovers part not in time or not easily, still nut loosening may be fallen, so this kind of packing ring anti-loosing effect is undesirable, working life is also relatively short.
in the prior art, " locking glue " solves nut loosening problem also to adopt a kind of name to be called, namely on the surface of external thread of screw, first coats locking glue, and then screw on nut.Because locking glue is a kind of multicomponent high molecular polymer with high-strength high-elasticity, it has very lasting elasticity and mechanical strength, so, after it is by interior outer nut compression, produce powerful friction in the circumference of internal and external threads, this friction can produce a decline threshold values in whole bolt, when comprehensive external force fails to exceed this decline threshold values, bolt can keep original steady state, effectively can prevent nut loosening.But because locking glue has elasticity and mechanical strength, working resistance during screw on nut can be strengthened on the one hand, affect working efficiency, can raise the cost on the other hand.
the name that No. 201020674043, Chinese patent is authorized is called that " anti-loosening MACHINE SCREWS " provides a solution, this MACHINE SCREWS comprises cap head and the screw rod with the projection of cap first side institute, and outside thread is provided with on screw rod, and externally threaded multiple Luo Feng both sides are the asymmetric formula outside thread of shaping differing tilt angles, for the shaping difference in externally threaded multiple Luo Feng both sides large small angle, its meaning wants by the peak-to-peak angular slope of screw thread spiral shell to strengthen frictional force between nut and occlusal contact area to reach fastening object.Although multiple Luo Feng tilt angle that the outside thread of this kind of MACHINE SCREWS is arranged, screw can be avoided to loosen after locking, but because the screw thread on screw rod is made up of mechanical tapping, and utilizing in the process of mechanical tapping, tapping multiple Luo Feng tilt angle is quite difficult, makes its working process relative complex, manufacturing efficiency is also relatively low, topmost problem is, if when this kind of MACHINE SCREWS bears relatively large external force, screw also can loosen.
the name of Chinese patent No. 2011200314890 notice of authorization is called that the jam nut proposed in " Shockproof anti-loosening screw " comprises one and has bolt slot, a directed nut and an embolus, after being threaded to bolt slot to fastening position or position location by directed nut, again embolus body is inserted the groove of described bolt slot, stretch in the bolt mother of directed nut, and closely withstand the screw thread of nut, to complete location and antivibration locking functions.Although this patent can by embolus by nut location to play the locking effect of antivibration, move along bolt slot because embolus is also easy under external force, and embolus to move and directly can cause nut loosening, and working process also relative complex.
Summary of the invention
the purpose of this utility model be to provide a kind of utilize two kinds of nuts to solve screw coupling member according to the mode that opposite direction rotates after easily loosen problem prevent loose type bolt.
what the utility model proposed prevents loose type bolt from comprising stepped shaft screw rod and nut, and the front threads direction that the rear threads that in the screw thread on stepped shaft screw rod wherein, cross-sectional diameter is large is little with cross-sectional diameter is contrary; Nut comprises the first nut be screwed in rear threads and the second nut be screwed in front threads, and the surface that described first nut is relative with the second nut is respectively arranged with unidirectional inclined teeth.
the both sides of described stepped shaft screw rod are respectively arranged with rear threads and front threads, are provided with the location shaft shoulder extended radially outwardly in the central region of stepped shaft screw rod.
an end of described stepped shaft screw rod is provided with head, and this stepped shaft screw rod is disposed with rear threads and front threads away from one end of head.
inclined teeth on described first nut and the second nut is inclined trapezoidal or right-angled triangle.
the stepped shaft screw rod that what the utility model proposed prevent loose type bolt from adopting is provided with the contrary outside thread of both direction, and on the axial surface of the first nut and the second nut, be provided with inclined teeth, when two nut drivings are on stepped shaft screw rod and after making two inclined teeth contacts, two nuts can be fixed, so, even if be subject to very large External Force Acting after this kind of bolt is locked, also can not make nut rotation, bolt can be made also can not to loosen under very big bang power effect.
Accompanying drawing explanation
accompanying drawing 1 is the surface structure schematic diagram preventing a loose type bolt embodiment that the utility model proposes;
accompanying drawing 2 is surface structure schematic diagram that in Fig. 1, nut launches.
Embodiment
see Fig. 1 and Fig. 2, these two figure provide the overall appearance structure preventing a loose type bolt embodiment that the utility model proposes.This bolt comprises stepped shaft screw rod 1, nut 2, inclined teeth 3 and the location shaft shoulder 4.The described location shaft shoulder 4 is the parts for preventing stepped shaft screw rod 1 from rotating, it is arranged on the central region of stepped shaft screw rod 1, this location shaft shoulder 4 extending radially outwardly from stepped shaft screw rod 1, the stepped shaft screw rod 1 of the shaft shoulder 4 both sides, location is respectively arranged with rear threads 11 and front threads 12, the cross-sectional diameter at position, rear threads 11 place is greater than the cross-sectional diameter at position, front threads 12 place, and rear threads 11 is contrary with the direction of front threads 12; Nut 2 comprises first nut 21 that can be screwed in rear threads 11 and the second nut 22 be screwed in front threads 12, and the first nut 21 and the second nut 22 are provided with internal thread 23.The surface that first nut and the second nut 22 contact is respectively arranged with inclined teeth 3, and what the inclined teeth 3 that the present embodiment provides adopted is right-angled triangle, and makes the first nut identical with the true dip direction of the inclined teeth 3 on the second nut 22.
what the present embodiment proposed prevents loose type bolt to be suitable for connecting hoist walking track and crane end carriage.In the process of joining rails or crane end carriage, after in the hole of first the location shaft shoulder 4 of stepped shaft screw rod 1 being inserted track or crane end carriage, first the first nut 21 is screwed in the rear threads 11 of stepped shaft screw rod 1, then the second nut 22 is screwed in the front threads 12 of stepped shaft screw rod 1, in the process screwing the second nut 22, after the inclined teeth 3 on the second nut 22 contacts with the inclined teeth 3 on the first nut 21, because the direction of two inclined teeth 3 is identical, so, inclined teeth 3 on second nut 22 is meshed with the inclined teeth 3 on the first nut 21 and the first nut 21 and the second nut 22 can not be made again to rotate, also the first nut 21 and the second nut 22 can not be made to rotate even if this kind of bolt is subject to super-strength vibration frequency.
in addition, bolt due to this kind of structure can connect the parts in each field, so, bolt also can adopt and an end of stepped shaft screw rod 1 is provided with head (not providing in figure), and be disposed with rear threads and front threads at this stepped shaft screw rod 1 away from one end of head, namely this kind of bolt only can screw the first nut 21 and the second nut 22 in a direction.
Claims (4)
1. prevent loose type bolt, it is characterized in that comprising:
Stepped shaft screw rod: the front threads direction that the rear threads that in the screw thread on this stepped shaft screw rod, cross-sectional diameter is large is little with cross-sectional diameter is contrary; With
Nut: this nut comprises the first nut be screwed in rear threads and the second nut be screwed in front threads, and the surface that described first nut is relative with the second nut is respectively arranged with unidirectional inclined teeth.
2. bolt according to claim 1, is characterized in that: the both sides of described stepped shaft screw rod are respectively arranged with rear threads and front threads, is provided with the location shaft shoulder extended radially outwardly in the central region of stepped shaft screw rod.
3. bolt according to claim 1, is characterized in that: an end of described stepped shaft screw rod is provided with head, and this stepped shaft screw rod is disposed with rear threads and front threads away from one end of head.
4. bolt according to claim 1, is characterized in that: the inclined teeth on described first nut and the second nut is inclined trapezoidal or right-angled triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420753326.7U CN204284167U (en) | 2014-12-05 | 2014-12-05 | Prevent loose type bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420753326.7U CN204284167U (en) | 2014-12-05 | 2014-12-05 | Prevent loose type bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204284167U true CN204284167U (en) | 2015-04-22 |
Family
ID=52867331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420753326.7U Expired - Fee Related CN204284167U (en) | 2014-12-05 | 2014-12-05 | Prevent loose type bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204284167U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454913A (en) * | 2014-12-05 | 2015-03-25 | 衣志江 | Loosening-preventing bolt |
| CN115126759A (en) * | 2021-03-24 | 2022-09-30 | 解克才 | Locknut assembly |
-
2014
- 2014-12-05 CN CN201420753326.7U patent/CN204284167U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454913A (en) * | 2014-12-05 | 2015-03-25 | 衣志江 | Loosening-preventing bolt |
| CN115126759A (en) * | 2021-03-24 | 2022-09-30 | 解克才 | Locknut assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20161205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |