CN219639234U - Pretightening force threaded fastener extension anti-loosening connection pair - Google Patents
Pretightening force threaded fastener extension anti-loosening connection pair Download PDFInfo
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- CN219639234U CN219639234U CN202321339870.2U CN202321339870U CN219639234U CN 219639234 U CN219639234 U CN 219639234U CN 202321339870 U CN202321339870 U CN 202321339870U CN 219639234 U CN219639234 U CN 219639234U
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- extension
- tightening
- bolt
- pretightening
- spring
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- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 230000005489 elastic deformation Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a pretightening force threaded fastener extension anti-loosening connection pair, which comprises an extension rod, a pretightening spring and a pretightening sleeve, wherein a through hole is formed in the shaft part of the pretightening sleeve, a pretightening straight slot is formed in the end face of the through hole, the extension rod is fixed in the through hole, the extension rod straight slot is overlapped with the pretightening straight slot, the rotation direction of the pretightening spring is opposite to the rotation direction of a bolt thread, and a straight shank of the pretightening spring is clamped in the extension rod straight slot and the pretightening straight slot; the bolt assembly comprises an extension bolt and a slotted nut, and three triangular buckles are arranged on the wall of the slotted hole. According to the utility model, the firmness of the connection of the pre-tightening spring is improved by the punching riveting of the extension rod and the pre-tightening sleeve and the fastening screwing fixation mode between the extension rod and the extension bolt; the diameter of the extension rod is obviously smaller than that of the extension bolt, and space is provided for elastic deformation of the pre-tightening spring, so that the pre-tightening force range of the pre-tightening spring is greatly increased, and the service life of the pre-tightening spring is prolonged.
Description
Technical Field
The utility model relates to the technical field of bolts, in particular to a pretightening force threaded fastener extension anti-loosening connecting pair.
Background
The utility model patent with the publication number of CN218670159U discloses a pretightening force type threaded fastener anti-loosening connecting pair, the scheme is that a key slot is formed at the screwing end of a bolt, a tooth slot is formed on the non-working surface of a nut, a pretightening force of the nut can be realized by reversely clamping a pretightening spring between the key slot and the tooth slot, and the spring generates an acting force in the clockwise direction on the nut, so that the nut is kept in a screwing state at any moment, and the pretightening force type threaded fastener has a good anti-loosening effect in a long-term use process. However, the above scheme has the following disadvantages: the end part of the pre-tightening spring is not firmly fixed, and the pre-tightening spring is easy to loose; the space between the inner diameter of the pre-tightening spring and the outer diameter of the bolt is limited, so that the deformation of the pre-tightening spring is limited, the pre-tightening force range of the pre-tightening spring is reduced, and the service life of the pre-tightening spring is shortened. The exposed bolt of the nut is too long, which is unfavorable for the use of the electric pretensioning tool. The present application is therefore further improved.
Disclosure of Invention
The utility model aims to provide a pretightening force threaded fastener extension anti-loosening connecting pair, and aims to solve the problems in the prior art.
The embodiment of the utility model provides a pretightening force threaded fastener extension anti-loosening connection pair, which comprises the following components: the extension sleeve assembly comprises an extension rod, a pre-tightening spring and a pre-tightening sleeve, wherein the extension rod is cylindrical, three L-shaped buckles are arranged on the periphery of one end of the extension rod, the opening direction of each L-shaped buckle is opposite to the screw thread direction of a bolt, and an extension straight slot passing through the axis is formed in the other end of the extension rod; the shaft part of the pre-tightening sleeve is provided with a through hole, the end surface of the through hole is provided with a pre-tightening straight slot, the extension rod is fixed in the through hole, and the extension rod coincides with the pre-tightening straight slot; one acting end of a pre-tightening spring is fixed in the extension straight slot, and the other acting end of the pre-tightening spring is clamped in the nut straight slot of the bolt component; the rotation direction of the pre-tightening spring is opposite to the rotation direction of the screw thread of the bolt;
the bolt assembly comprises an extension bolt and a slotted nut, one end of the extension bolt is provided with a slotted hole, three triangular buckles are arranged on the wall of the slotted hole, and the hypotenuse of each triangular buckle extends towards the end face of the slotted hole; the slotted nut is screwed on the extension bolt, and a plurality of nut straight grooves which are radial through the axle center are formed in the end face of one end of the non-working face of the slotted nut.
Preferably, the diameter of the end surface of the extension rod provided with the L-shaped buckle is matched with the diameter of the slotted hole of the extension bolt; the L-shaped buckle extends into the slot hole and is clamped and fixed with the triangular buckle.
Preferably, the width of the groove extending to the straight groove is equal to the diameter of the pre-tightening spring steel wire, and the depth of the groove is 4 times of the diameter of the pre-tightening spring steel wire; the length of the extension rod is smaller than that of the pre-tightening spring.
Preferably, the triangular buckle is unfolded in a right triangle shape, wherein one right-angle side extends axially, and the other right-angle side extends circumferentially.
Preferably, the pretension spring comprises a straight end which is radially traversed inwards and a hooked end which is bent axially outwards.
Preferably, a through groove is formed in one side end face of the pre-tightening sleeve, and the through groove is communicated with the through hole; friction teeth are axially arranged on the periphery of the pre-tightening sleeve.
The beneficial effects of the utility model are as follows: the firmness of the connection of the pre-tightening spring is improved by the mode of punching riveting of the extension rod and the pre-tightening sleeve and fastening and screwing fixation of the extension rod and the extension bolt; the diameter of the extension rod is obviously smaller than that of the extension bolt, and space is provided for elastic deformation of the pre-tightening spring, so that the pre-tightening force range of the pre-tightening spring is greatly increased, and the service life of the pre-tightening spring is prolonged. In addition, the length of the exposed bolt of the nut can be shortened through the structure of the utility model, and the electric pre-tightening tool is convenient to use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic exploded view of the present utility model.
Fig. 2 is a schematic end view of the extension rod of the present utility model.
Fig. 3 is a schematic end view of the pretensioning sleeve according to the utility model.
Fig. 4 is a schematic end view of the extension bolt of the present utility model.
Fig. 5 is a schematic end view of a slotted nut of the present utility model.
Fig. 6 is a schematic end view of the pretension spring of the present utility model.
The symbols in the drawings illustrate:
1. extending a connecting rod; 11. an L-shaped buckle; 12. extending and connecting a straight slot; 2. pre-tightening the sleeve; 21. a through hole; 22. a through groove; 24. a step; 25. pre-tightening the straight groove; 3. extending and connecting bolts; 31. a slot hole; 32. triangular buckle; 4. a slotted nut; 41. a nut straight groove; 5. a pre-tightening spring; 51. a straight end of the straight line; 52. a hook-shaped bent end.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, for convenience of explanation, only the portions related to the present embodiment are shown, and the details are as follows:
a pretension threaded fastener extension anti-loosening connection pair, comprising: and the extension sleeve component and the bolt component.
The extension sleeve assembly comprises an extension rod 1, a pre-tightening spring 5 and a pre-tightening sleeve 2. As shown in fig. 1 and 2, the extension rod 1 is cylindrical, one end periphery of the extension rod 1 is provided with three circumferential L-shaped buckles 11, the opening direction of each L-shaped buckle 11 is opposite to the screw thread direction of a bolt, the other end of the extension rod 1 is provided with an axial extending straight slot 12, the slot width of the extending straight slot 12 is equal to the diameter of the steel wire of the pre-tightening spring 5, and the slot depth is 4 times the diameter of the steel wire of the pre-tightening spring 5; the length of the extension rod 1 is smaller than the length of the pre-tightening spring 5.
Friction teeth are axially arranged on the periphery of the pre-tightening sleeve 2, a through groove 22 is formed in one side end face of the pre-tightening sleeve 2, as shown in fig. 1 and 3, a through hole 21 is formed in the shaft portion of the pre-tightening sleeve 2, and the through groove 22 is communicated with the through hole 21. The through slot 22 is directed towards the bolt assembly, the inner diameter of the through slot 22 being matched to the outer diameter of the pretensioning spring 5, so that the through slot 22 can accommodate the pretensioning spring 5 in a compressed state. The diameter of the through hole 21 is smaller than that of the through groove 22, the through hole 21 is raised towards the direction of the through groove 22 to form a step 24, and the height of the step 24 is 2 times of the diameter of the steel wire of the pre-tightening spring 5. The end face of the step 24 is provided with a pre-tightening straight groove 25 passing through the center of the through hole 21. The groove width of the pre-tightening straight groove 25 is equal to the diameter of the steel wire of the pre-tightening spring 5. The extension rod 1 is fixed in the through hole 21, and the extension straight slot 12 is overlapped with the pre-tightening straight slot 25.
The pretension spring 5 has a direction opposite to the screw thread direction, and as shown in fig. 1 and 6, the pretension spring 5 includes a straight end 51 crossing radially inwards and a hook-shaped bent end 52 bending axially outwards. The straight end 51 of the pre-tightening spring 5 is clamped in the extending straight groove, and the hook-shaped bent end 52 is clamped in the nut straight groove 41 of the bolt component.
The bolt assembly comprises an extension bolt 3 and a slotted nut 4. As shown in fig. 1 and 4, the end face of the screwed end of the extension bolt 3 is provided with a slot 31, the depth of the slot 31 is outside the screw thread, three triangular buckles 32 are uniformly arranged on the wall of the slot 31, the triangular buckles 32 are unfolded to be in a right triangle shape, one right-angle side extends axially, the other right-angle side extends circumferentially, and the hypotenuse of the triangular buckle 32 extends along the screw thread direction to the end face of the screwed end slot 31. The diameter of the end face of the extension rod 1 provided with the L-shaped buckle 11 is matched with the diameter of the slotted hole 31 of the extension bolt 3; the L-shaped buckle 11 extends into the slotted hole 31 and is clamped and fixed with the triangular buckle 32. The slotted nut 4 is screwed on the extension bolt 3, as shown in fig. 1 and 5, a plurality of nut straight grooves 41 passing through the axial center in radial direction are formed on the end face of one end of the slotted nut 4, the groove width of the nut straight grooves 41 is 3 times of the diameter of the steel wire of the pre-tightening spring 5, and the groove depth is 2 times of the diameter of the steel wire of the pre-tightening spring 5.
The assembly mode of the utility model is as follows:
assembling the extension sleeve component: the straight end 51 of the pre-tightening spring 5 is clamped in the extending groove 12 of the extending rod 1, the extending rod 1 is inserted into the through hole 21, the straight end 51 of the pre-tightening spring 5 is clamped in the pre-tightening groove 25, and the end face of the extending rod 1 with the extending groove 12 is riveted to complete assembly.
Assembling a connecting pair: the slotted nut 4 is screwed on the extension bolt 3 according to the pretightening force requirement, the extension rod 1 is aligned with the slotted hole 31 of the extension bolt 3, the pretightening sleeve 2 is rotated by fingers along the screw thread direction of the bolt, the extension rod 1 is connected with the extension bolt 3 through the rotation clamping action of the L-shaped clamping buckle 11 and the triangular clamping buckle 32, the hook-shaped bent end 52 of the pretightening spring 5 is stirred by fingers, the hook-shaped bent end 52 of the pretightening spring 5 is abutted against the nut straight slot 41 of the slotted nut 4, and therefore effective pretightening force is formed on the slotted nut 4. The slotted nut 4 can be used as a working nut of a bolt or a locking nut of a double nut. And the pretension force of the pretension spring 5 can be tested or increased by pulling the hook-shaped bent end 52 of the pretension spring 5.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (6)
1. The utility model provides a pretightning force threaded fastener extension locking loose connection is vice, its characterized in that includes:
the extension sleeve assembly comprises an extension rod, a pre-tightening spring and a pre-tightening sleeve, wherein the extension rod is cylindrical, three L-shaped buckles are arranged on the periphery of one end of the extension rod, the opening direction of each L-shaped buckle is opposite to the screw thread direction of a bolt, and an extension straight slot passing through the axis is formed in the other end of the extension rod; the shaft part of the pre-tightening sleeve is provided with a through hole, the end surface of the through hole is provided with a pre-tightening straight slot, the extension rod is fixed in the through hole, and the extension rod coincides with the pre-tightening straight slot; one acting end of a pre-tightening spring is fixed in the extension straight slot, and the other acting end of the pre-tightening spring is clamped in the nut straight slot of the bolt component; the rotation direction of the pre-tightening spring is opposite to the rotation direction of the screw thread of the bolt;
the bolt assembly comprises an extension bolt and a slotted nut, one end of the extension bolt is provided with a slotted hole, three triangular buckles are arranged on the wall of the slotted hole, and the hypotenuse of each triangular buckle extends towards the end face of the slotted hole; the slotted nut is screwed on the extension bolt, and a plurality of nut straight grooves which are radial to pass through the axle center are formed in the end face of one end of the slotted nut.
2. The pretightening force threaded fastener extension anti-loosening connection pair according to claim 1, wherein the end face diameter of the extension rod provided with an L-shaped buckle is matched with the diameter of a slotted hole of the extension bolt; the L-shaped buckle extends into the slot hole and is clamped and fixed with the triangular buckle.
3. The pretightening force threaded fastener extension anti-loosening connection pair according to claim 1, wherein the width of the extension straight groove is equal to the diameter of the pretightening spring steel wire, and the depth of the extension straight groove is 4 times the diameter of the pretightening spring steel wire; the length of the extension rod is smaller than that of the pre-tightening spring.
4. A pretensioned threaded fastener extension anti-loosening connection as in claim 1, wherein the triangular clasp is configured in the shape of a right triangle with one leg extending axially and the other leg extending circumferentially.
5. A pretensioned threaded fastener extension slip resistant connection according to claim 1 wherein the pretensioned spring includes a straight end which is radially inward transverse and an outwardly axially bent hooked end.
6. The pretightening force threaded fastener extension anti-loosening connection pair according to claim 1, wherein a through groove is formed in one side end surface of the pretightening sleeve, and the through groove is communicated with the through hole; friction teeth are axially arranged on the periphery of the pre-tightening sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321339870.2U CN219639234U (en) | 2023-05-30 | 2023-05-30 | Pretightening force threaded fastener extension anti-loosening connection pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321339870.2U CN219639234U (en) | 2023-05-30 | 2023-05-30 | Pretightening force threaded fastener extension anti-loosening connection pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219639234U true CN219639234U (en) | 2023-09-05 |
Family
ID=87819591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321339870.2U Active CN219639234U (en) | 2023-05-30 | 2023-05-30 | Pretightening force threaded fastener extension anti-loosening connection pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219639234U (en) |
-
2023
- 2023-05-30 CN CN202321339870.2U patent/CN219639234U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |