CN111059124B - Bolt and bolt assembly - Google Patents
Bolt and bolt assembly Download PDFInfo
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- CN111059124B CN111059124B CN201911389332.2A CN201911389332A CN111059124B CN 111059124 B CN111059124 B CN 111059124B CN 201911389332 A CN201911389332 A CN 201911389332A CN 111059124 B CN111059124 B CN 111059124B
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- 238000012856 packing Methods 0.000 claims description 22
- 230000003746 surface roughness Effects 0.000 claims description 3
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- 230000009471 action Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a bolt, which comprises a bolt head and a screw rod, wherein the bolt head comprises a fixed part integrated with the screw rod and a rotating part separated from the screw rod, the fixed part and the rotating part are semi-cylindrical, and the sections of the fixed part and the rotating part are jointed; the fixed part and the rotating part are provided with communicating holes, and a pin shaft penetrates through the communicating holes to hinge the rotating part and the fixed part so as to enable the rotating part to rotate around the pin shaft; the distance between the communication hole and one end, close to the screw, of the rotating part is larger than the half length of the rotating part, and the distance between the communication hole and the other end of the rotating part is larger than the diameter of the screw; the bolt provided by the invention is provided with the rotating part which can rotate under the action of gravity, the rotating part is adjusted to be parallel to the screw rod and is plugged into the screw hole, then the rotating part is rotated by 90 degrees to clamp the inner side plate wall of a plate to be fastened, and the functions of fastening and quickly disassembling the plate in a narrow and closed space can be realized by matching with the nut.
Description
Technical Field
The application relates to the technical field of mechanical manufacturing engineering, in particular to a bolt and a bolt assembly.
Background
A bolt is a cylindrical threaded fastener fitted with a nut. The bolt comprises a head part and a screw rod, needs to be matched with a nut for use, and is used for fastening and connecting two parts with through holes. When the bolt is used, the bolt head at one end of the screw rod and the nut at the other end of the screw rod are required to be simultaneously tightened at two sides of a fastened object, so that a good fastening effect can be achieved; however, in some special application scenarios, for example, the internal operation space with the fastening object is very narrow, or the internal space is closed, a human hand or a tool cannot enter the internal space, and cannot simultaneously tighten a nut or a bolt head on both sides inside and outside, and only can be tightened by one, so that the bolt connection is not stable, and accident potential is caused. If non-detachable welding or riveting is selected to ensure connection and fastening, great inconvenience can be generated in some application scenes needing frequent detachment of the connecting piece, the detachment efficiency is influenced, and the connecting part is disposable, so that the detachment cost is increased. Therefore, there is a need for a detachable connection device that can be implemented in a narrow, enclosed space where human hands or tools cannot enter the operation.
Disclosure of Invention
The invention provides a bolt and a bolt assembly, which aim to solve or partially solve the technical problem of considering fastening strength and convenient disassembly in a narrow or closed operation space which can not be accessed by hands and tools.
In order to solve the technical problems, the invention provides a bolt which comprises a bolt head and a screw, wherein the bolt head comprises a fixed part integrated with the screw and a rotating part separated from the screw, the fixed part and the rotating part are semi-cylindrical, and the cross sections of the fixed part and the rotating part are jointed; the fixed part and the rotating part are provided with communicating holes, and a pin shaft penetrates through the communicating holes to hinge the rotating part and the fixed part so as to enable the rotating part to rotate around the pin shaft; distance L between the communicating hole and one end of the rotating part close to the screw rod2Greater than half length L of the rotating part1The distance between the communication hole and the other end of the rotating part is larger than the diameter of the screw;
when the rotating part is parallel to the fixed part, the fixed part and the rotating part form a cylinder shape which is the same as that of the screw rod, so that the bolt head passes through the bolt hole of the part to be locked; when the rotating part rotates to be perpendicular to the fixing part, the bolt head is fastened with the to-be-locked piece.
Further, the distance L between the communication hole and one end, close to the screw, of the rotating part2And half length L of the rotary part1The following is also satisfied between/2:
L1/20≤L2-L1/2≤L1/10。
according to the technical scheme, the pin shaft is in clearance fit with the rotating part.
In the above-described embodiment, the surface roughness of the rotating portion is 6.0 μm or more.
According to the technical scheme, the arc side surface of the rotating part is a plane at two ends parallel to the axis of the rotating part.
Based on the same inventive concept of the foregoing technical solutions, the present invention further provides a bolt assembly, including the bolt in the foregoing technical solutions, and a nut matched with the bolt.
According to the technical scheme, the bolt assembly further comprises a flexible filling sleeve sleeved on the screw rod, and the length of the flexible filling sleeve is larger than the depth of the bolt hole; when the screw is in a fastening state, the diameter of the flexible plug sleeve at one end of the head of the screw is larger than the length of the rotating part, and the diameter of the flexible plug sleeve at the other end of the screw is larger than the diameter of the nut.
Optionally, both ends of the flexible packing sleeve are whisker-shaped.
Optionally, the thickness of the flexible packing sleeve is greater than or equal to half of the tooth depth of the external thread of the screw.
Optionally, an anti-slip washer is further disposed between the flexible packing sleeve and the nut.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention provides a bolt, wherein the bolt head comprises a fixed part and a rotating part which is hinged with the fixed part and can rotate under the action of gravity, the rotating part is adjusted to be parallel to a screw rod and is plugged into the screw hole, and then the rotating part is rotated by 90 degrees to clamp the inner side wall of a plate to be fastened, so that the bolt head and the screw rod on the inner side and the outer side can be fastened simultaneously by performing one-way operation on the outer side of an object to be fastened; the bolt provided by the invention can be conveniently plugged and fastened in a space which cannot be reached by hands and tools, such as a narrow closed space, and the like, and the functions of fastening and quickly disassembling the plate in the narrow closed space are realized by matching with the nut.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a view showing a construction of a bolt installed in a narrow closed space according to an embodiment of the present invention;
FIG. 2 shows a cross-sectional view of a bolt according to one embodiment of the present invention;
FIG. 3 illustrates a perspective view of a bolt according to one embodiment of the present invention;
FIG. 4 is a schematic view showing a swivel part of a bolt in a restrained vertical state before being inserted into a threaded hole according to an embodiment of the present invention;
FIG. 5 is a schematic view showing a state in which a rotary part is freely rotated by gravity after a bolt is inserted into a threaded hole according to an embodiment of the present invention;
fig. 6 is a schematic view showing a state where a bolt is lifted up on a screw and a rotating part locks an inner wall of a panel to be locked according to an embodiment of the present invention;
FIG. 7 illustrates a schematic view of a flexible packing sleeve in a bolt assembly according to one embodiment of the present invention;
description of reference numerals:
1. a bolt head; 11. a fixed part; 12. a rotating part; 2. a screw; 3. a nut; 4. a pin shaft; 5. a flexible packing sleeve; 6. an anti-slip washer.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
In order to use the bolt connection in a narrow and closed fastener inner space which can not be accessed by human hands and tools and realize simultaneous locking on two sides of the bolt, the inventor provides a bolt in an alternative embodiment, as shown in fig. 1 to fig. 3, wherein the bolt comprises a bolt head 1 and a screw rod 2, the bolt head 1 comprises a fixed part 11 integrated with the screw rod 2 and a rotating part 12 separated from the screw rod 2, the fixed part 11 and the rotating part 12 are semi-cylindrical and have sections which are jointed; the fixed part 11 and the rotating part 12 are provided with communicating holes, and a pin shaft 4 passes through the communicating holes to hinge the rotating part 12 and the fixed part 11 so as to enable the rotating part 12 to rotate around the pin shaft 4; distance L from the communication hole to one end of the rotary part 12 close to the screw 22Greater than half length L of the rotary part 121/2, communicating the bore to the rotary part 12The distance between the ends is larger than the diameter of the screw rod 2;
when the rotating part 12 is parallel to the fixed part 11, the fixed part 11 and the rotating part 12 form the same cylinder shape as the screw 2, so that the bolt head 1 passes through the bolt hole of the part to be locked; when the rotating part 12 is rotated to be perpendicular to the fixing part 11, the bolt is fastened to the member to be locked.
The bolt that this embodiment provided, improved the structure of bolt head 1, no longer used the fixed unchangeable hexagon head of traditional structure, button head or square head, but adopted a rotatable rotating part 12, articulated on a fixed part 11 through round pin axle 4, rotating part 12 can be around round pin axle 4 and do free rotation to a variable bolt head of structure has been constituteed. In the case of using the bolt of the present embodiment, when the rotating portion 12 and the fixed portion 11 (i.e., the threaded rod 2) are restrained by a person or a tool in parallel, as shown in fig. 4, the rotating portion 12 and the fixed portion 11 are formed in a cylindrical shape without difference from the threaded rod 2, and the rotating portion 12 and the fixed portion 11 can be inserted together into a threaded hole of an object to be fastened while maintaining L in the rotating portion 122A section (as shown in fig. 3) is directed towards the screw 2. When the rotary part 12 is completely inserted into the narrow or closed inner space of the object to be fastened through the screw hole, since the lengths of the pin holes from both ends of the rotary part 12 are different, the distance (L) of the pin holes from one end of the rotary part 12 near the screw rod 2 is different2) Is greater than the distance (L) of the pin hole from the other end of the rotating part 121-L2) Therefore, under the action of gravity or slight external force disturbance (such as the up-and-down movable screw rod 2), the rotating part 12 can spontaneously rotate after completely entering the closed space, as shown in fig. 5; when the rotating part 12 rotates and deviates from the axis of the screw rod 2, the screw rod 2 is lifted up again, under the action of the inner wall of the object to be fastened, the rotating part 12 and the screw rod 2 or the fixing part 11 form 90 degrees, one end of the side surface of the rotating part clamps the inner wall of the object to be fastened, as shown in fig. 6, at this time, the rotating part 12 plays the role of a bolt head of a traditional bolt, and fastening is realized from one side in the closed space. After the inner side is clamped tightly, a nut matched with the bolt is sleeved on the screw rod 2 and screwed, and external threads are arranged on the screw rod 2, so that the narrow and closed double-side bolt of the object to be fastened is fastened.
When the bolt needs to be disassembled, the nut is firstly taken down, then the screw rod 2 is put down, at the moment, under the action of gravity, the rotating part 12 starts to rotate until being parallel to the axial direction of the screw rod 2 or the fixing part 11 again, and compared with the state of being plugged into the screw hole for fastening, the rotating part 12 rotates by 180 degrees; then, the screw 2 is lifted up, so that the rotary part 12 and the fixed part 11 are lifted out of the bolt hole, and the bolt is removed.
When the bolt in the embodiment is manufactured, the blank pieces are selected according to the overall dimensions of the screw rod 2, the rotating part 12 and the pin shaft 4, and the length, the thickness and the outer diameter of each blank piece are required to be reserved with machining allowance of 2 mm. The material of the screw 2 and the rotary part 12 can be selected from carbon structural steel A3(GB700-2008) or the like; the nut matched with the bolt is selected to be a universal nut meeting the national standard. The nominal diameter specification of the bolt is designed and manufactured according to the dimension on the relevant specification table of the national standard GB/T5781-2016.
Generally speaking, this embodiment makes the bolt carry out one-way operation in the outside of treating the fastening object and can realize the bolt head and the screw rod fastening of inside and outside both sides simultaneously through the rotating part that can autonomically rotate under the action of gravity to can be in narrow airtight equal space that staff and instrument can't touch, the convenient bolt head of plugging in and fastening, the nut that deuterogamies and bolt supporting has realized plate fastening and quick dismantlement function in narrow confined space simultaneously.
The key point of the bolt provided by the invention is that the rotating part 12 of the bolt head 1 can rotate spontaneously under the action of gravity or slight disturbance, and the rotating speed is not too high, so that the rotating part 12 rotates 180 degrees and is parallel to the screw rod 2 again at the moment that the bolt head 1 enters a closed space, and the bolt head 1 is lifted out of a screw hole when the screw rod 2 is lifted up. First, in order to solve the problem that the rotation portion 12 can rotate spontaneously by gravity, it has been required in the foregoing embodiment that the arrangement position of the pin hole, that is, the communication hole satisfies L2>L1/2 or L2>L1-L2That is, in the initial state (L)2That portion faces upward) the rotating portion 12 rotates spontaneously under the force of gravity. Based on the foregoing embodimentWith the same inventive concept, in another alternative embodiment, the preferred communication hole is spaced a distance L from the end of the rotating portion 12 near the screw 22And half length L of the rotary part 121The following is also satisfied between/2: l is1/20≤L2-L1/2≤L1/10. By making the rotating portion 12 and the communicating hole (pin hole) satisfy the above quantitative relationship, the rotating portion 12 can be made to have the ability to freely rotate with gravity, and at the same time, the fastening efficiency is not affected by the excessive rotation.
In order to ensure that the rotating part 12 can rotate freely, the pin 4 is optionally clearance-fitted to the rotating part 12. By keeping a reasonable gap, the rotating part 12 can well rotate by taking the pin shaft 4 as a rotating shaft; the surface of the pin 4 may have a roughness, such as greater than 6.0 μm, preferably 6.3 μm.
In order to further ensure that the rotation speed of the rotary part 12 is not too fast, in a further alternative embodiment, the surface roughness of the rotary part 12 may be 6.0 μm or more, preferably 6.3 μm, and the surface may be slightly burred, based on the same inventive concept of the previous embodiment; the surface with certain roughness can avoid the reduction of operating efficiency caused by too fast rotation.
Based on the same inventive concept of the previous embodiments, in yet further alternative embodiments, the rotating part 12 is edge rounded near the stationary part 11 and the screw 2.
Based on the same inventive concept of the previous embodiments, in still other alternative embodiments, the circular arc side surface of the rotary part 12 is a flat surface at both ends parallel to the axis of the rotary part 12. The inner wall surface of the object to be fastened can be better attached by polishing the arc side surface of the rotating part 12 contacting with the inner plate wall of the object to be fastened into a plane, so that the fastening effect of the inner side of the closed space is improved.
In the above-described group of embodiments, a bolt is provided, which can achieve bolt fastening to a narrow, closed space by performing a one-way/one-side operation in the space outside the object to be fastened by introducing the rotation portion 12 through structural improvement of the bolt head 1. In other alternative embodiments, based on the same inventive concept of the previous embodiments, a bolt assembly is provided, which comprises any one of the bolts in the previous embodiments, and a nut 3 matched with the bolt.
Because only one-sided operation can be performed, compared with a common bolt assembly, the rotating part 12 or the nut 3 of the one-way operation bolt assembly is easy to slip in the fastening process, so that the fastening effect is affected, particularly, the rotating part 12 is easy to slip on the inner side plate wall of an object to be fastened, but is limited by a narrow and sealed space, and the rotating part 12 cannot be observed and adjusted. The inventors found through studies that the main cause of occurrence of slippage is insufficient fastening friction between the one-way operation bolt in the present invention and the plate wall of the object to be fastened.
In order to solve the problem, the inventor bases on the same inventive concept of the previous embodiment, and in still other alternative embodiments, the bolt assembly further comprises a flexible packing sleeve 5 sleeved on the screw rod 2, and the length of the flexible packing sleeve 5 is greater than the depth of the bolt hole; in the fastened state, the diameter of the flexible packing sleeve 5 at one end of the head of the screw 2 is larger than the length of the rotating part 12, and the diameter of the flexible packing sleeve 5 at the other end of the screw 2 is larger than the diameter of the nut 3.
The flexible plugging sleeve 5 is sleeved on the screw rod 2, and two ends of the flexible plugging sleeve 5 extend outwards of the bolt hole. As shown in fig. 1, in the fastened state, the flexible packing sleeve 5 extends inside the fastening object, i.e., the bolt head 1 has one end with a range larger than the range covered by the rotating portion 12 and the other end with a range larger than the range covered by the nut 3. The flexible packing sleeve 5 arranged between the bolt assembly and the object to be fastened can strengthen the fastening friction force and avoid the slipping in the fastening process; the flexible packing sleeve 5 may use an elastic PE polyethylene material having a certain thickness.
In order to further increase the fastening friction between the rotating part 12 and the nut 3 and the object to be fastened, in other alternative embodiments both ends of the flexible packing sleeve 5 are whisker-shaped, based on the same inventive concept as in the previous embodiments. The flexible plug sleeve 5 with the whisker-shaped edge can be fully attached to the nut 3 or the rotating part 12, certain flexible deformation occurs to the whisker-shaped part in the process of fastening the bolt, gaps between whisker parts are filled, and compared with the complete edge, folding caused by deformation can be avoided, so that the effective attaching area of the flexible plug sleeve 5 and the nut 3 or the rotating part 12 is increased, and the fastening friction force is further enhanced.
Based on the same inventive concept of the above embodiments, in other alternative embodiments, the thickness of the flexible packing sleeve 5 is greater than or equal to half of the tooth depth of the external thread of the screw 2, and the flexible packing sleeve 5 with such thickness can well provide the required fastening friction force for the bolt assembly, so as to avoid the bolt from slipping during fastening.
In order to further improve the anti-slip effect at one end of the nut 3, in some alternative embodiments, an anti-slip washer 6 is also provided between the flexible packing sleeve 5 and the nut 3, as shown in fig. 1.
For a bolt assembly comprising a flexible packing sleeve 5 and a slip-resistant washer 6, the method of use is as follows:
(1) selecting a bolt assembly with a proper diameter according to a screw hole on the plate, and constraining the rotating part 12 to be consistent with the direction L of the screw rod 22One end of the tube faces upwards;
(2) the screw rod 2 is sleeved with a matched flexible filling sleeve 5, then the bolt head 1 is filled into the screw hole, and the rotating part 12 and the screw rod 2 body form a 90-degree angle through up-down moving the screw rod 2 to clamp the lower surface of a plate to be fastened;
(3) and lifting the screw rod 2 body upwards, sleeving the anti-skid washer 6 and the nut 3 on the screw rod 2 side and tightening, so that the flexible filling sleeve 5 is elastically deformed to fill the gap between the bolt, the nut 3 and the fastening plate.
In an alternative embodiment, the bolt assemblies in the previous embodiments are applied to 3000-ton fishery administration ship air conditioning unit device construction projects, equipment with a plurality of M12 bolt holes in dead corners of a cabin is fastened with a base, the torque of the equipment is measured to meet design requirements, and the equipment fastening task is simply and efficiently completed.
The practical ship uses the evidence that the one-way operation bolt assembly provided by the invention is a very successful detachable fastening means. The bolt fastening structure solves the technical problem that the conventional bolt fastening construction cannot be carried out in narrow, closed and dead angle spaces or cannot meet the fastening requirement, improves the application range of the fastening bolt, provides equipment installation quality, improves labor efficiency, greatly reduces construction risk and difficulty, and has good applicability and practicability.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention provides a bolt, wherein the bolt head comprises a fixed part and a rotating part which is hinged with the fixed part and can rotate under the action of gravity, the rotating part is adjusted to be parallel to a screw rod and is plugged into the screw hole, and then the rotating part is rotated by 90 degrees to clamp the inner side wall of a plate to be fastened, so that the bolt head and the screw rod on the inner side and the outer side can be fastened simultaneously by performing one-way operation on the outer side of an object to be fastened; the bolt provided by the invention can be conveniently plugged and fastened in a space which cannot be touched by hands and tools, such as a narrow closed space, and the like, and the bolt fastening and quick dismounting functions in the narrow and closed space are realized by matching with the nut;
furthermore, in order to avoid the phenomenon that the nut and the rotating part slip during fastening of the bolt, so that the fastening effect is influenced, the flexible connecting sleeve is sleeved on the screw rod, two ends of the flexible connecting sleeve extend outwards from the bolt hole, in the fastening state, the extension range of the flexible plug sleeve at one end of the bolt head is larger than the coverage range of the rotating part, and the extension range at the other end of the flexible plug sleeve is larger than the coverage range of the nut, so that the fastening friction force can be increased through the flexible plug sleeve, the nut and the rotating part are prevented from slipping, and further, two ends of the flexible connecting sleeve are in a whisker shape, so that the fastening friction force can be further increased;
in general, the bolt and the bolt assembly provided by the invention fundamentally solve the problems of few measures, high difficulty, low operability and the like of fixing the plate in a narrow closed space on the spot of workers, and are particularly suitable for fixing the plate and fastening equipment in a place with small tonnage and more equipment and having more narrow closed cabins and dead angles in ships.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. The bolt is characterized by comprising a bolt head and a screw rod, wherein the bolt head comprises a fixed part integrated with the screw rod and a rotating part separated from the screw rod, the fixed part and the rotating part are semi-cylindrical, the cross sections of the fixed part and the rotating part are attached, and the edge parts of the rotating part at the fixed part and the screw rod are rounded off; the rotating part is hinged to the rotating part through a hinge pin, and the rotating part is driven to rotate around the hinge pin; the distance L between the communicating hole and one end of the rotating part close to the screw rod2Is greater than half length L of the rotary part1And/2 and satisfies: l is1/20≤L2-L1/2≤L1A distance from the communication hole to the other end of the rotating portion is larger than the diameter of the screw;
when the rotating part is parallel to the fixing part, the fixing part and the rotating part form a cylinder shape which is the same as that of the screw rod, so that the bolt head passes through a bolt hole of a part to be locked; when the rotating part rotates to be perpendicular to the fixing part, the bolt head is fastened with the to-be-locked piece.
2. The bolt of claim 1, wherein the pin is a clearance fit with the rotatable portion.
3. The bolt according to claim 1, wherein the surface roughness of the rotating portion is 6.0 μm or more.
4. The bolt of claim 1, wherein the arcuate side surfaces of the rotary portion are planar at opposite ends parallel to the axis of the rotary portion.
5. A bolt assembly, comprising a bolt according to any one of claims 1 to 4, and a nut associated with the bolt.
6. The bolt assembly of claim 5, further comprising a flexible packing sleeve disposed over the shank, the flexible packing sleeve having a length greater than a depth of the bolt hole; when the screw is in a fastening state, the diameter of the flexible plug sleeve at one end of the head of the screw is larger than the length of the rotating part, and the diameter of the flexible plug sleeve at the other end of the screw is larger than the diameter of the nut.
7. The bolt assembly of claim 6, wherein the flexible packing sleeve is whisker-shaped at both ends.
8. The bolt assembly of claim 6, wherein the thickness of the flexible packing sleeve is equal to or greater than one-half the depth of the teeth of the external threads of the threaded shank.
9. The bolt assembly of claim 6, further comprising a slip resistant washer between the flexible packing sleeve and the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389332.2A CN111059124B (en) | 2019-12-30 | 2019-12-30 | Bolt and bolt assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389332.2A CN111059124B (en) | 2019-12-30 | 2019-12-30 | Bolt and bolt assembly |
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| Publication Number | Publication Date |
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| CN111059124A CN111059124A (en) | 2020-04-24 |
| CN111059124B true CN111059124B (en) | 2021-09-28 |
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| CN204878188U (en) * | 2015-07-17 | 2015-12-16 | 上海泰大建筑科技有限公司 | Single face locking bolt |
| CN205639236U (en) * | 2016-03-15 | 2016-10-12 | 深圳市深装总装饰股份有限公司 | Lightweight wall through -wall screw |
| CN110001919A (en) * | 2017-11-28 | 2019-07-12 | 空中客车营运有限公司 | Fastener and component and aircraft wing |
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| KR100918513B1 (en) * | 2007-10-17 | 2009-09-24 | (주)소고에어텍 | Contracting bolt |
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| CN87103404A (en) * | 1986-05-07 | 1987-11-18 | 莫洛格兰姆工业公司 | Deformable drive nut blind hole fastening piece is arranged and with the method for its fastening plate |
| CN1342248A (en) * | 1999-03-04 | 2002-03-27 | 派斯奎尔·富斯科 | Fasteners |
| JP2008267427A (en) * | 2007-04-17 | 2008-11-06 | Sanko Techno Co Ltd | Hollow structure mounting bracket and hollow structure mounting bracket unit |
| CN103410830A (en) * | 2013-07-29 | 2013-11-27 | 青岛宝基利工程技术咨询有限公司 | Connecting bolt structure capable of mounting screw rod afterwards as well as mounting and dismounting method of connecting bolt structure |
| CN204878188U (en) * | 2015-07-17 | 2015-12-16 | 上海泰大建筑科技有限公司 | Single face locking bolt |
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| CN111059124A (en) | 2020-04-24 |
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