CN110529472B - Pressure fastener - Google Patents
Pressure fastener Download PDFInfo
- Publication number
- CN110529472B CN110529472B CN201910876557.4A CN201910876557A CN110529472B CN 110529472 B CN110529472 B CN 110529472B CN 201910876557 A CN201910876557 A CN 201910876557A CN 110529472 B CN110529472 B CN 110529472B
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- Prior art keywords
- nut
- threaded sleeve
- piston
- threaded
- air passage
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- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Images
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
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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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/284—Locking by means of elastic deformation
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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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0241—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread with the possibility for the connection to absorb deformation, e.g. thermal or vibrational
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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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0266—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using springs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
Abstract
The invention relates to a pressure fastener, which effectively solves the problems that a nut is easy to return and a worker is not easy to fasten when a drainage plate is fixed; the technical scheme for solving the problem is that the bolt comprises a bolt and is characterized in that a threaded sleeve is sleeved on an external thread of the bolt, a thread is arranged on the outer wall of the upper end of the threaded sleeve, a nut is sleeved on the upper part of the threaded sleeve in a threaded manner, and an elastic piece is arranged at the lower end of the nut; a plurality of air passages are formed in the outer part of the threaded sleeve, two groups of air holes are formed in the two sides of each air passage in parallel up and down, an upper piston is connected in each air passage in a vertically sliding mode, and each upper piston is connected with a lower piston which is connected in a corresponding air passage in a vertically sliding mode through a connecting rod mechanism arranged in each air passage; the outer part of the nut is coaxially and rotatably connected with a pushing ring, and each upper piston is fixedly connected with the pushing ring through a rod piece; the nut tightening device is simple in structure, the pre-tightening force between the bolt and the fastener, the pre-tightening force between the fastening clamp and the nut are effectively increased, the fastening effect is good, the nut is not easy to retract, the operation is easy, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to a pressure fastener.
Background
Between two high voltage transmission lines or between two transmission lines near the transformer, usually need to fix two transmission line clamps through two drainage plates, in this process, usually adopt the bolt to clip two drainage plates, however in this process, often have following problem:
1. after the bolt and the nut are used for a period of time, the situation of nut rollback is easy to occur, so that the pressing force of the drainage plate on the electric wire is reduced and the electric wire is invalid;
2. because of the drainage plate is mostly the aluminum alloy material, the workman leads to the nut to roll back for preventing to unscrew when twisting the nut, can exert oneself more fiercely easily usually, and then can cause the drainage plate to warp like this to lead to becoming invalid.
Therefore, a fastener which is convenient for workers to use and is not easy to retreat is continued.
The present invention therefore provides a new pressure fastener to address this problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the pressure fastener, which effectively solves the problems that a nut is easy to retreat and a worker is not easy to fasten when a drainage plate is fixed.
The bolt comprises a bolt and is characterized in that a threaded sleeve is sleeved on the external thread of the bolt, threads are arranged on the outer wall of the upper end of the threaded sleeve, a nut is sleeved on the threads of the upper part of the threaded sleeve, and the lower end of the nut is fixedly connected with an elastic piece arranged in the threaded sleeve;
a plurality of air passages are formed in the outer part of the threaded sleeve, two groups of vent holes are formed in the two sides of each air passage in a vertical parallel mode, an upper piston is connected in each air passage in a vertical sliding mode, and each upper piston is connected with a lower piston which is connected in a corresponding air passage in a vertical sliding mode through a connecting rod mechanism arranged in each air passage;
the outer part of the nut is coaxially and rotatably connected with a pushing ring, and each upper piston is fixedly connected with the pushing ring through a rod piece.
Preferably, each air flue lower extreme all seted up the pressure boost hole, every pressure boost hole all the coaxial rubber circle of being provided with fixed connection in threaded sleeve bottom outside.
Preferably, the pushing ring is provided with a plurality of threaded holes, the upper end of each upper piston is rotatably connected with a screw, and the upper end of each screw is respectively matched with the threaded holes in the pushing ring.
Preferably, the middle part of each screw is coaxially and fixedly connected with a screw gear, and the outer part of the threaded sleeve is coaxially and rotatably connected with an outer gear ring which is simultaneously meshed with the plurality of screw gears.
Preferably, one side of each upper piston is provided with a transverse sliding groove, a positioning clamping block is connected in each transverse sliding groove in a sliding manner, each positioning clamping block is connected with the corresponding transverse sliding groove through a return spring, each air passage is provided with a positioning through hole, and each positioning clamping block can be arranged in the corresponding positioning through hole;
each horizontal spout lower extreme all seted up the power of letting out mouth.
Preferably, the bolt is externally threaded with a nut arranged below the threaded sleeve.
Preferably, the lower end of the screw cap is coaxially fixed and connected with a screw cap sleeve in a refining stage, the screw cap sleeve is sleeved outside the threaded sleeve and is in threaded engagement with the threaded sleeve, and scales are engraved on the outer wall of the screw cap sleeve.
Preferably, the link mechanism comprises a transfer connecting rod rotatably connected in the air passage, one end of the transfer connecting rod is rotatably connected with an upper connecting rod of which the other end is rotatably connected at the lower end of the corresponding upper piston, and the other end of the transfer connecting rod is rotatably connected with a lower connecting rod rotatably connected at the upper end of the corresponding lower piston.
Preferably, the positioning through holes in each air passage can be a plurality of positioning through holes which are arranged in parallel from top to bottom, and a sealing plug is arranged outside each positioning through hole.
Preferably, a plurality of sealing rings are rotatably connected outside the threaded sleeve, and each sealing ring can seal a plurality of positioning through holes in the same horizontal plane.
The invention makes improvement aiming at the problems that the nut is easy to return and the worker is not easy to fasten when the drainage plate is fixed, the existing nut is changed into a pressure fastener or the pressure fastener is additionally arranged above the existing nut, and the nut is pressed on the drainage class, so that the nut does not have a space for returning; meanwhile, through the elastic piece and the related structure, the pretightening force and the friction force between the nut and the fastening piece as well as between the fastening piece and the bolt are increased, so that parts are firmer and are not easy to loosen.
Drawings
FIG. 1 is a schematic front view of the present invention.
Fig. 2 is a first perspective view of the present invention without a nut.
Fig. 3 is a perspective view of the present invention with a nut.
Fig. 4 is a second perspective view of the present invention without a nut.
FIG. 5 is a schematic cross-sectional view of the present invention.
Fig. 6 is a schematic sectional view of the upper piston and its internal structure according to the present invention.
Fig. 7 is a schematic sectional perspective view of the present invention.
Fig. 8 is a perspective view of the threaded sleeve of the present invention.
FIG. 9 is a front view of the screw of the present invention and its related structure.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 9. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The first embodiment of the invention relates to a pressure fastener, which comprises a bolt 1 and is characterized in that a threaded sleeve 2 is sleeved on an external thread of the bolt 1, a thread is arranged on the outer wall of the upper end of the threaded sleeve 2, a nut 3 is sleeved on the upper part of the threaded sleeve 2 in a threaded manner, an elastic part 4 arranged in the threaded sleeve 2 is fixedly connected to the lower end of the nut 3, the elastic part 4 can be a spring 18 or a spring steel sleeve or even a common elastic part 4 such as an air pressure device or an oil pressure device, after two drainage plates clamp an electric wire, the bolt 1 passes through fixing holes of two drainage plates, the threaded sleeve 2 is sleeved on the bolt 1 and screwed, then the nut 3 is screwed, at the moment, the nut 3 compresses the elastic part 4, the restoring force of the elastic part 4 acts upwards and downwards simultaneously, and the nut 21 and the bolt 1 cannot retract under the action of the thread, the restoring force is applied to the nut 3 and the bolt 1 and is used as a pre-tightening force to increase the friction force between the nut 3 and the thread sleeve 2 and between the bolt 1 and the thread sleeve 2, so that the bolt 1, the thread sleeve 2 and the nut 3 are fixed more tightly and are not easy to loosen;
the threaded sleeve 2 is externally provided with a plurality of air passages 5, two sides of each air passage 5 are respectively provided with two groups of vent holes 6 in a vertical parallel manner, referring to fig. 1, each air passage 5 is internally and vertically connected with an upper piston 7 in a sliding manner, each upper piston 7 is connected with a lower piston 8 which is vertically connected in the corresponding air passage 5 in a sliding manner through a connecting rod mechanism arranged in the air passage 5, the upper piston 7 moves downwards and can drive the corresponding lower piston 8 to move upwards through the connecting rod mechanism, it should be noted that, in an initial position, the upper piston 7 is positioned above one group of vent holes 6 above the two groups of vent holes 6 in the corresponding air passage 5, the lower piston 8 is positioned below one group of vent holes 6 below the two groups of vent holes 6 in the corresponding air passage 5, when the upper piston 7 moves downwards to a certain position, the vent holes 6 above the two groups of vent holes 6 can be sealed, meanwhile, when the lower piston 8 moves upwards to a certain position, the vent holes 6 at the lower part of the two corresponding groups of vent holes 6 can be sealed;
the connecting rod mechanism comprises a transfer connecting rod 23 which is rotatably connected in the air passage 5, one end of the transfer connecting rod 23 is rotatably connected with an upper connecting rod 24, the other end of the transfer connecting rod 23 is rotatably connected with the lower end of the corresponding upper piston 7, and the other end of the transfer connecting rod 23 is rotatably connected with a lower connecting rod 25 which is rotatably connected with the upper end of the corresponding lower piston 8, so that the upper piston 7 moves downwards to drive the lower piston 8 to move upwards;
the outer part of the nut 3 is coaxially and rotatably connected with a pushing ring 9, specifically, a pushing ring 9 clamping groove is formed in the outer part of the nut 3, the pushing ring 9 is rotatably connected in the pushing ring 9 clamping groove, a bearing can be arranged between the pushing ring 9 clamping groove and the pushing ring 9 for reducing friction force, each upper piston 7 is fixedly connected with the pushing ring 9 through a rod piece, namely, when a worker rotates the nut 3 to move downwards to compress the elastic piece 4, the pushing ring 9 can be synchronously driven to move downwards, the pushing ring 9 drives the upper piston 7 to move synchronously through the rod piece, when the embodiment is specifically used, after the two drainage plates clamp the electric wire, the bolt 1 passes through the fixing holes of the two drainage plates, the threaded sleeve 2 is sleeved on the bolt 1 and screwed, then the nut 3 is screwed, the nut 3 compresses the elastic piece 4, and the restoring force of the elastic piece 4 acts upwards and downwards simultaneously, applying a pretightening force to the screw cap 3 and the screw bolt 1, meanwhile, the screw cap 3 moves downwards to drive the pushing ring 9 and the rod piece to drive the upper pistons 7 to move downwards, and the corresponding lower pistons 8 are driven to move upwards through the corresponding connecting rod mechanisms, the upper pistons 7 and the lower pistons 8 approach each other, gas between the upper pistons 7 and the lower pistons is discharged through the vent holes 6 until the upper pistons 7 and the lower pistons 8 seal the vent holes 6 in the corresponding air passages 5, then the screw cap 3 is continuously rotated until the larger resistance is sensed, at the moment, the elastic piece 4 generates larger deformation and generates a downward pretightening force, and meanwhile, air between the upper pistons 7 and the lower pistons 8 in each air passage 5 is squeezed and generates an upward pretightening force, so that the screw bolt 1, the screw sleeve 2 and the screw cap 3 are better fastened.
In the second embodiment, on the basis of the first embodiment, the present embodiment provides a specific structure, so that the threaded sleeve 2 can be tightly connected with the contacted drainage plate, specifically, the lower end of each air passage 5 is provided with a pressurizing hole 10, a rubber ring 11 fixedly connected to the bottom of the threaded sleeve 2 is coaxially arranged outside each pressurizing hole 10, when the present embodiment is used specifically, the threaded sleeve 2 is sleeved on the bolt 1 and screwed until the rubber ring 11 is contacted with the upper drainage plate and then stopped, or the threaded sleeve can be screwed for a circle and stopped after the rubber ring 11 is contacted with the upper drainage plate so that the rubber ring 11 is tightly attached to the drainage plate to prevent air leakage, then the nut 3 is screwed to drive the lower piston 8 to move upwards, thereby through pressure boost hole 10 with firm the inhaling in 2 below threaded sleeve of drainage plate to make this device and drainage plate realize harmless the connection, can be better play the fastening effect.
Embodiment three, on the basis of embodiment one, this embodiment provides a specific way of connecting the upper piston 7 and the push ring 9, so that the initial position of the upper piston 7 is adjustable, specifically, the push ring 9 is provided with a plurality of threaded holes 12, the upper end of each upper piston 7 is rotatably connected with a screw 13, the upper end of each screw 13 is respectively matched with the plurality of threaded holes 12 on the push ring 9, the middle part of each screw 13 is coaxially and fixedly connected with a screw gear 14, the outer part of the threaded sleeve 2 is coaxially and rotatably connected with an outer gear ring 15 which is simultaneously engaged with the plurality of screw gears 14, the outer gear ring 15 can rotate to drive the plurality of screw gears 14 engaged with the outer gear ring to rotate and drive the corresponding screw 13 to rotate, at this time, because the push ring 9 is rotatably connected to the screw cap 3, and the screw cap 3 is threadedly engaged with the threaded sleeve 2, under the action of thread self-locking, the nut 3 cannot displace up and down, so that the push ring 9 also cannot displace up and down, the screw 13 rotates and drives the screw 13 to lift under the action of the threaded hole 12, so as to drive the corresponding upper piston 7 to lift, and thus the initial position of the upper piston 7 is adjusted, and the distance between the upper piston 7 and the push ring 9 is far, so that the distance of downward movement of the nut 3 is short, so that the degree of compression of the elastic part 4 is low, and the pre-tightening force generated by the elastic part 4 in the process of restoring deformation is relatively small; the distance that upper piston 7 and pushing ring 9 are close then can make nut 3 move down longer to make the degree that elastic component 4 compressed is great, the pretightning force that elastic component 4 recovered the deformation and produced is also great relatively.
Fourth embodiment, on the basis of the first embodiment, a worker can feel resistance by screwing the nut 3 in place, and this embodiment provides a better operation mode for the worker, so that the worker can feel quantized, that is, a standard position is set, specifically, one side of each upper piston 7 is provided with a transverse sliding groove 16, each transverse sliding groove 16 is connected with a positioning fixture block 17 in a sliding manner, each positioning fixture block 17 is connected with the corresponding transverse sliding groove 16 through a return spring 18, each air passage 5 is provided with a positioning through hole 19, each positioning fixture block 17 can be placed in the corresponding positioning through hole 19, when the upper piston 7 moves downward and seals the corresponding vent hole 6, the upper piston 7 continues to move downward and compresses air until the positioning fixture block 17 enters the positioning through hole 19, at this time, the upper piston 7 cannot continue to move downward, the worker can not screw the nut 3;
each transverse sliding groove 16 is provided with a leakage force notch 20 at the lower end, the arrangement of the leakage force notch 20 is that if the leakage force notch 20 is not arranged, the restoring force generated by air compression is balanced by the bottom surfaces of the positioning fixture block 17, the positioning through hole 19 and the transverse sliding groove 16, namely, after the positioning fixture block 17 enters the positioning through hole 19, the positioning fixture block 17 is fixed, the restoring force generated by air compression is acted on the contact part of the bottom surfaces of the positioning fixture block 17 and the transverse sliding groove 16, the upper piston 7 does not have the upward movement trend at the contact part, so that the nut 3 cannot have the upward movement trend due to the restoring force generated by air compression, after the leakage force notch 20 is arranged, the upper piston 7 still cannot move under the effect of the threaded engagement of the nut 3 and the threaded sleeve 2, at the moment, the lower end of the positioning fixture block 17 is not contacted with the transverse sliding groove 16, and the upper piston 7 is acted by the restoring force generated by air compression and moves upward through the screw 13 and the push ring 9 The trend of (3) is transmitted to the nut 3, i.e. the nut 3 is pre-tensioned.
Fifth embodiment, on the basis of the second embodiment, in each of the above embodiments, there is no nut 21, that is, the threaded sleeve 2 replaces the nut 21 to compress the drainage plate, and this embodiment provides another embodiment, specifically, the threaded sleeve of the bolt 1 is externally threaded with the nut 21 disposed below the threaded sleeve 2, at this time, the nut 21 and the bolt 1 compress the two drainage plates, at this time, the rubber ring 11 and the nut 21 are tightly attached, and similarly, the threaded sleeve 2 is still in threaded engagement with the bolt 1 and applies a pre-tightening force to the bolt 1 and the nut 3 under the effect of the nut 3 and the above structure, so as to improve the fastening ability, at this time, under the effect of the threaded sleeve 2, the nut 21 does not have a space for retraction, thereby ensuring that the nut 21 is not loosened.
Sixth embodiment, in addition to the first embodiment, in order to facilitate the worker's observation of the force that may be generated by compressing the elastic member 4 after adjusting the distance between the upper piston 7 and the push ring 9, the present embodiment provides a specific manner of facilitating the operation, specifically, the lower end of the screw cap 3 is coaxially fixed and connected with a screw cap sleeve 22 in a refining stage, the screw cap sleeve 22 is sleeved outside the threaded sleeve 2 and is in threaded engagement with the threaded sleeve 2, the screw cap sleeve 22 and the screw cap 21 are coaxially fixed, so that the nut 21 can be engaged with a plurality of partial threads of the threaded sleeve 2 even if the upper piston 7 and the push ring 9 have a larger distance therebetween, thereby improving the structural stability, the push ring 9 can be rotatably connected outside the nut sleeve 22, the outer wall of the nut sleeve 22 is marked with scales, after the screw 13 can be carved on the scale and adjusted to the corresponding position, the upper piston 7 moves to the positioning fixture block 17 and is clamped into the positioning through hole 19, and then the pre-tightening force which can be generated by the elastic part 4 is generated.
Seventh embodiment, on the basis of the fourth embodiment, in order to adjust the amount of the compressed air of the upper piston 7 and the lower piston 8, and thus adjust the magnitude of the pretightening force generated by the compressed air in a stepped manner as required, this embodiment provides a specific adjustment manner, so that the pretightening force generated by the compressed air of the upper piston 7 and the lower piston 8 can be adjusted, specifically, the plurality of positioning through holes 19 in each air passage 5 may be arranged in parallel from top to bottom, the centers of the plurality of positioning through holes 19 are located on the same vertical line, and the plurality of positioning through holes 19 in different positions are respectively located on the same horizontal plane, that is, on the same horizontal height, and there are all positioning through holes 19 with the same number as the air passages 5;
the threaded sleeve 2 is externally rotatably connected with a plurality of sealing rings, each sealing ring can seal or open a plurality of positioning through holes 19 in the same horizontal plane, namely, each sealing ring is provided with alignment holes with the same number as that of the air passages 5, when a worker rotates the sealing ring to a certain position, each alignment hole on the sealing ring is coaxially corresponding to each positioning through hole 19, so that the positioning through holes 19 are opened, in the embodiment, when the threaded sleeve is used specifically, the worker can seal each positioning through hole 19 on different horizontal planes and only expose each positioning through hole 19 on one horizontal plane by rotating each sealing ring, the amount of compressed air between the upper piston 7 and the lower piston 8 is determined, the more the position of the exposed positioning through hole 19 is, the larger the volume of compressed air between the upper piston 7 and the lower piston 8 is, and the larger the generated pre-tightening force is generated under the condition of the same movement distance, conversely, the lower the position of the exposed positioning through hole 19 is, the smaller the volume of air compressed between the upper piston 7 and the lower piston 8 is, and the smaller the generated pretightening force is under the condition of the same movement distance, and a worker can select to expose a proper positioning through hole 19 according to the principle to generate the required pretightening force.
When the invention is used in concrete, after the two drainage plates clamp the electric wire, the bolt 1 passes through the fixing holes of the two drainage plates to sleeve the threaded sleeve 2 on the bolt 1 and is screwed until the rubber ring 11 is contacted with the drainage plate above, and then the threaded sleeve stops, or the threaded sleeve stops after the rubber ring 11 is contacted with the drainage plate above, so that the rubber ring 11 is tightly jointed with the drainage plate to prevent air leakage, then the nut 3 is screwed, the nut 3 compresses the elastic piece 4, the restoring force of the elastic piece 4 acts up and down at the same time, a pretightening force is exerted on the nut 3 and the bolt 1, meanwhile, the nut 3 moves down to drive the push ring 9 and the rod piece to drive the plurality of upper pistons 7 to move down, and drive the corresponding lower pistons 8 to move up through the corresponding connecting rod mechanisms, the upper pistons 7 and the lower pistons 8 approach each other, the air between the upper pistons 7 and the lower pistons 8 is discharged through the air passages 6 until the upper pistons 7 and the lower pistons 8 seal the corresponding air passages 6 in the corresponding 5, then, the nut 3 is continuously rotated until a large resistance is sensed, at the moment, the elastic piece 4 generates large deformation and generates downward and upward pretightening force, and meanwhile, air between the upper piston 7 and the lower piston 8 in each air passage 5 is extruded and generates upward pretightening force, so that the bolt 1 and the threaded sleeve 2 as well as the threaded sleeve 2 and the nut 3 are better fastened;
meanwhile, the nut 21 is screwed to drive the lower piston 8 to move upwards, so that the drainage plate is firmly sucked below the threaded sleeve 2 through the pressurizing hole 10, the nondestructive connection between the device and the drainage plate is realized, and a fastening effect can be better played;
a worker can drive the screw 13 to transmit by rotating the outer gear ring 15 in advance so as to adjust the initial position of the upper piston 7, and if the upper piston 7 and the pushing ring 9 are far away, the downward movement distance of the nut 3 is short, so that the degree of compression of the elastic piece 4 is low, and the pretightening force generated by the elastic piece 4 in the process of restoring deformation is relatively small; the distance that upper piston 7 and pushing ring 9 are close then can make nut 3 move down longer to make the degree that elastic component 4 compressed is great, the pretightning force that elastic component 4 recovered the deformation and produced is also great relatively.
The invention makes improvement aiming at the problems that the nut is easy to return and the worker is not easy to fasten when the drainage plate is fixed, the existing nut is changed into a pressure fastener or the pressure fastener is additionally arranged above the existing nut, and the nut is pressed on the drainage class, so that the nut does not have a space for returning; meanwhile, through the elastic piece and the related structure, the pretightening force and the friction force between the nut and the fastening piece as well as between the fastening piece and the bolt are increased, so that parts are firmer and are not easy to loosen.
Claims (5)
1. The pressure fastener comprises a bolt (1) and is characterized in that a threaded sleeve (2) is sleeved on the outer thread of the bolt (1), threads are formed in the outer wall of the upper end of the threaded sleeve (2), a nut (3) is sleeved on the upper portion of the threaded sleeve (2) in a threaded manner, and the lower end of the nut (3) is fixedly connected with an elastic piece (4) arranged inside the threaded sleeve (2);
the threaded sleeve (2) is characterized in that a plurality of air passages (5) are formed in the wall of the threaded sleeve (2), two groups of vent holes (6) are formed in the two sides of each air passage (5) in parallel up and down, an upper piston (7) is connected in each air passage (5) in a sliding mode up and down, each upper piston (7) is connected with a lower piston (8) which is connected in the corresponding air passage in a sliding mode up and down through a connecting rod mechanism arranged in each air passage (5), and the lower piston (7) can move downwards to drive the corresponding lower piston (8) to move upwards through the connecting rod mechanism;
the outer part of the nut (3) is coaxially and rotatably connected with a pushing ring (9), and each upper piston (7) is fixedly connected with the pushing ring (9) through a rod piece;
the link mechanism include and rotate transfer connecting rod (23) of connection in air flue (5), transfer connecting rod (23) one end rotate and be connected with the other end and rotate and connect last connecting rod (24) at corresponding last piston (7) lower extreme, transfer connecting rod (23) other end rotate be connected with lower connecting rod (25) of rotation connection in corresponding lower piston (8) upper end.
2. The pressure fastener according to claim 1, characterized in that the pushing ring (9) is provided with a plurality of threaded holes (12), the upper end of each upper piston (7) is rotatably connected with a threaded rod (13), and the upper end of each threaded rod (13) is respectively matched with the plurality of threaded holes (12) on the pushing ring (9).
3. A pressure fastener according to claim 2, characterized in that a screw gear (14) is coaxially and fixedly connected to the middle of each screw (13), and an external gear ring (15) which is simultaneously engaged with a plurality of screw (13) gears is coaxially and rotatably connected to the outside of the threaded sleeve (2).
4. The pressure fastener according to claim 1, characterized in that one side of each upper piston (7) is provided with a transverse sliding groove (16), each transverse sliding groove (16) is connected with a positioning fixture block (17) in a sliding manner, each positioning fixture block (17) is connected with the corresponding transverse sliding groove (16) through a return spring (18), each air passage (5) is provided with a positioning through hole (19), and each positioning fixture block (17) can be arranged in the corresponding positioning through hole (19);
the lower end of each transverse sliding groove (16) is provided with a force-releasing notch (20).
5. A pressure fastener according to claim 1, characterized in that the bolt (1) is externally threaded with a nut (21) arranged below the threaded sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876557.4A CN110529472B (en) | 2019-09-17 | 2019-09-17 | Pressure fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876557.4A CN110529472B (en) | 2019-09-17 | 2019-09-17 | Pressure fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110529472A CN110529472A (en) | 2019-12-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111720416A (en) * | 2020-05-29 | 2020-09-29 | 江苏永昊高强度螺栓有限公司 | Combined nut assembly |
| CN112643326B (en) * | 2021-01-26 | 2022-10-21 | 江苏格纳特连接系统有限公司 | High efficiency pushes away nut structure |
| CN113684976B (en) * | 2021-08-25 | 2022-09-23 | 重庆市渝海建设(集团)有限公司 | Roof waterproof structure and construction method |
| CN113775614B (en) * | 2021-09-14 | 2023-03-03 | 海安奥克机械制造有限公司 | Effectual locking device for lifting equipment of theftproof |
| CN115162226B (en) * | 2022-08-11 | 2023-12-26 | 深圳榕亨实业集团有限公司 | Anti-loose waterproof buried spike |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1629937B1 (en) * | 2004-08-26 | 2009-01-21 | Schunk GmbH & Co. KG Spann- und Greiftechnik | Chuck with inner clamping means |
| CN202867501U (en) * | 2012-10-10 | 2013-04-10 | 国电联合动力技术有限公司 | Connecting component and sectional type wind turbine blade using the same |
| US9739301B2 (en) * | 2014-01-07 | 2017-08-22 | United Technologies Corporation | Systems and methods for centering bearing compartments |
| CN207212901U (en) * | 2017-08-07 | 2018-04-10 | 浙江卡卡自动化设备有限公司 | A kind of self-locking nut device |
| CN108533603B (en) * | 2018-06-26 | 2020-08-21 | 广州豹驰实业有限公司 | Self-locking bolt |
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