CN114876938A - Metal washer, anti-loosening structure thereof and anti-loosening thread pair - Google Patents
Metal washer, anti-loosening structure thereof and anti-loosening thread pair Download PDFInfo
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- CN114876938A CN114876938A CN202210663770.9A CN202210663770A CN114876938A CN 114876938 A CN114876938 A CN 114876938A CN 202210663770 A CN202210663770 A CN 202210663770A CN 114876938 A CN114876938 A CN 114876938A
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- bolt
- metal gasket
- metal
- washer
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 139
- 239000002184 metal Substances 0.000 title claims abstract description 139
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- 238000000034 method Methods 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 4
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- 230000007547 defect Effects 0.000 abstract description 2
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- 238000012545 processing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
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- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/122—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts foreseen with mating surfaces inclined, i.e. not normal, to the bolt axis
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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
Abstract
The invention discloses a metal washer, an anti-loosening structure and an anti-loosening thread pair thereof. The metal gasket, the periphery is circular, and the centre is equipped with coaxial round hole (37), its characterized in that: the metal gasket is a thicker metal gasket (1), one end face of the metal gasket is an inclined plane (32), or fixed salient points (8) are arranged, and the thick edge of the metal gasket is 1/10-1 times more than the thin edge of the metal gasket than the tooth pitch of the bolt (4). Anti loosening structure (11), its characterized in that: a coaxial thicker metal washer (1) is clamped between the main nut (2) and the auxiliary nut (3), and the main nut and the auxiliary nut are oppositely screwed on the screw rod (5). The locking thread pair (13) is characterized in that: the fixed end (10) of the bolt (4) is of an anti-loosening structure (11), and the surface of the internal thread (6) of the auxiliary nut (3) and the surface of the external thread (7) of the bolt (4) fall obliquely, are locked and are prevented from loosening by the aid of the thicker metal washer (1). The defect that the screw (5) in the prior art is easy to bend and cannot be reused is overcome, and the screw is used for fastening and preventing looseness of vibrating mechanical equipment and facilities.
Description
Technical Field
The invention relates to the field of anti-loose fasteners, in particular to a metal washer, an anti-loose structure and an anti-loose thread pair.
Background
Metal washers, finger elements, are known which are placed between the connected member and the nut. The metal washer is a flat metal ring and is used for protecting the surface of a connected piece from being scratched by a nut and dispersing the pressure of the nut on the connected piece, such as the national standard GB/T3103.3-2000, two ends of the metal washer are parallel to each other, and the upper thickness and the lower thickness of the flat metal ring are the same and cannot play a role in preventing looseness.
The existing double-nut friction anti-loosening structure is characterized in that two nuts with the same rotation direction are abutted to outer threads of the same bolt and are twisted to generate abutting force between the two nuts, so that a main nut and a spring pad at the bottom generate friction and generate friction with an auxiliary nut on the upper surface, the double friction achieves the pre-tightening effect, and the phenomenon of loosening can still occur after violent vibration.
For this reason, prior art CN204493402U provides a locknut structure, which includes a flat nut and a slanting nut. One end face of the inclined nut is an inclined face, an included angle is formed between the inclined face and a vertical line of a thread hole axis of the inclined nut, the flat nut and the inclined nut are sequentially installed on the bolt, and the matching contact faces of the two nuts comprise the inclined face and are sequentially screwed down. The inclined plane is not perpendicular to the axis of the bolt, the upper part of the inclined plane generates a certain bending moment to the bolt, and the anti-loosening effect is enhanced by the bending moment. This case has the following disadvantages: 1. because the main nut and the auxiliary nut, one is a flat nut and the other is an inclined nut, after the main nut and the auxiliary nut are pre-tightened on the same bolt, the contact plane and the inclined plane are in overall contact, and the situation that a screw rod of the bolt is bent to one side at the overall contact surface cannot be avoided; 2. the bolt is bent, so that the bolt can be used only once and cannot be reused; 3. because the bolt is deformed and bent by the screwed thread between the two nuts, the nut with the downward bent part cannot be disassembled, and the nut can be used only once; 4. the bevel nut is complicated in bevel processing by a die or a cutting means, and is high in cost because materials are wasted; 5. because the screw rod of the bolt is bent, the yield strength and the tensile strength of the bolt are greatly reduced, and the bolt can be subjected to yield fracture from the bent part of the screw rod during severe vibration; 6. because the respective shafts of the flat nut and the inclined nut are respectively coaxial with the bolt shaft of the section pre-tightened by the flat nut and the inclined nut, namely, each thread tooth of the flat nut and each thread tooth of the inclined nut are respectively parallel to the thread tooth surface of the bolt of the section to be screwed, one surface of each thread tooth is contacted and stretched, the axis of the nut and the axis of the bolt are coaxial, and when the nut vibrates on the screw and freely moves, the nut easily vibrates, rotates back and loosens on the outer thread of the screw without friction force.
Disclosure of Invention
In order to overcome the defects of the prior art, the proposal aims to provide a metal washer which is reliable in anti-loosening, low in cost and capable of being repeatedly used, an anti-loosening nut structure and an anti-loosening thread pair thereof.
The present case a metal packing ring, including the periphery be circular, the centre is coaxial round hole, the flat becket of constitution, its characterized in that:
the metal gasket is a thicker metal gasket, and the upper end surface and the lower end surface of the metal gasket are not parallel or inclined surfaces of the metal gasket are thicker; or at least one end surface is provided with a convex point;
the upper end face and the lower end face of a metal ring of the inclined plane thicker metal gasket form an included angle alpha, and alpha is more than 0 degree and less than 30 degrees;
the included angle alpha formed by the upper end surface and the lower end surface is a pair of acute angles in four dihedral angles formed by the upper end surface and the lower end surface, and the geometric father Euclidean definition angle is the relative inclination of two non-parallel straight lines in the planes;
one of the calculation methods for forming an included angle α between the upper end surface and the lower end surface is as follows: firstly, finding out an intersecting line of the upper end surface and the lower end surface, and respectively making a perpendicular line of the intersecting line in the two surfaces, wherein the included angle of the two lines is the included angle alpha of the upper end surface and the lower end surface; the second method is as follows: the two planes do not want to intersect, the two planes are first extended until they intersect, and then the steps of the first method are repeated;
the plane angle is characterized in that any point on an edge of a dihedral angle is used as an end point, two rays perpendicular to the edge are respectively made in two planes, and an angle formed by the two rays is called a plane angle alpha of the dihedral angle; or, rays perpendicular to the edges are respectively made in two half planes from any point on the edges of the dihedral angle, and the angle formed by the two rays is called the plane angle alpha of the dihedral angle.
The inclined plane thicker metal gasket is formed by stamping through a die.
The thicker metal gasket with the point comprises a flat metal ring which is circular at the periphery and coaxial with a round hole in the middle, wherein two end faces of the metal ring are parallel to each other to form a metal gasket body, and the thicker metal gasket is characterized in that:
one end plane of the metal ring is respectively contacted with the circular ring plane of the main nut or the auxiliary nut, and any position on the other end plane of the metal ring is provided with a convex point;
the convex points and the metal gasket body are fixed into a whole.
Furthermore, the height of the salient point is at least 1/10-1 times of the thread pitch of the external thread of the screw sleeved by the inner ring of the metal washer; the radial length of the bottom area of the salient points is not less than 1/3 times of the thread pitch of the external thread of the sleeved screw.
Further, the cross section of the salient point perpendicular to the height thereof is of an arbitrary shape.
Further, the cross section of the salient point, which is perpendicular to the height of the salient point, is in any shape of circle, ellipse, rectangle, trapezoid, triangle or prism.
Further, the convex points are fixedly connected with the circular ring plane at one end of the metal gasket or are integrally formed by stamping through a die; or welded as one; or integrally bonded by glue.
The thicker metal washer is better in anti-loosening effect if matched with the existing anti-loosening nut, and mainly matched with the main nut and the auxiliary nut to prevent loosening; when the metal washer is in a free loosening state, the conventional auxiliary nut plays a role, the auxiliary nut is prevented from moving freely, the metal washer is temporarily fixed, and the metal washer is waited for the next period of vibration fastening, so that the anti-loosening effect is better!
The anti-loosening structure comprises
The main nut is a common nut and is used for screwing the fixed end of the bolt,
the auxiliary nut is a common nut or a locknut, is used for being screwed on the fixed end of the bolt and is positioned outside the main nut,
the external thread of the screw rod of the bolt is used for coaxially screwing the internal thread of the main nut and the auxiliary nut,
the method is characterized in that:
the coaxial inclined plane thicker metal washer is clamped between the main nut and the auxiliary nut;
or the coaxial metal washer with the point and the thickness is clamped between the main nut and the auxiliary nut, when the salient point is between the metal flat washer body and the circular ring plane at the upper end of the main nut, the vertex of the salient point is in contact with the spiral point of the circular ring plane at the upper end of the main nut screwed on the bolt;
or when the salient point of the thicker metal washer is between the metal washer main body and the circular ring plane at the lower end of the auxiliary nut, the vertex of the salient point is in contact with the spiral point of the circular ring plane at the lower end of the auxiliary nut screwed on the bolt;
when the salient point or the top point of the inclined surface on the inclined surface or the thick metal washer with the point is in contact with the circular plane spiral point at one end of the main nut or the auxiliary nut, the main nut utilizes the gap between the internal thread of the auxiliary nut and the external thread of the bolt to enable the surface of the internal thread of the auxiliary nut and the surface of the external thread of the bolt to fall off due to the action of the highest top point of the salient point or the inclined surface on the thick metal washer, the auxiliary nut is locked by unidirectional rotation in the loosening direction, and the top point with the highest point of the salient point or the inclined surface blocks the main nut, so that the main nut can only be screwed and cannot be loosened, and the effect of stopping and loosening is achieved;
or the main nut and the auxiliary nut are twisted together with a certain pretightening force, and the main nut and the auxiliary nut are locked in a bidirectional spiral mode through the anti-loosening nut structure and fixed on the screw rod of the bolt, so that the anti-loosening structure is formed.
The common nut is a fixing tool, the center of the common nut is provided with a hole, the inner side of the hole is provided with threads, the periphery of the hole is provided with symmetrical regular hexagonal edges or square edges, the regular hexagonal edges or the square edges are in threaded connection with external threads of bolts with the same specification through the threads on the inner side of the round hole, a fastened piece A and a fastened piece B are fastened in a threaded mode between a bolt head and the common nut, and the two ends of the common nut are provided with circular ring planes which are parallel to each other and perpendicular to a screw hole shaft.
The anti-loose nut comprises a nut body and an annular elastic locking sheet, wherein the annular elastic locking sheet is arranged at the upper end of the nut body and is of an integral structure with the nut body; the inner diameter of the annular elastic locking piece is smaller than that of the internal thread part of the nut body, or the annular elastic locking piece and the internal thread part of the nut body are slightly staggered axially or radially. The annular elastic locking sheet is a nylon locking ring or a metal locking ring.
Furthermore, the internal thread of the screw hole of the common nut is provided with a coating, and the coating is coated with rubber or non-setting adhesive substances and is used for increasing the friction force between the nut and the bolt.
The anti-loosening thread pair comprises
One end of the bolt is a bolt head, and the other end of the bolt is a fixed end;
the anti-loosening structure is arranged at the fixed end of the bolt;
a fastened piece A and a fastened piece B are installed and fastened between the bolt head and the anti-loosening structure;
in some forms, a main flat washer or a main elastic washer is respectively arranged between the anti-loosening structure and the fastened piece A, and the main flat washer is positioned between the main elastic washer and the fastened piece A;
in some modes, the anti-loosening structure and the fastened piece A are not provided with a main flat washer or a main elastic washer.
The anti-loosening principle of the invention is as follows: by improving the existing metal washer, the formed inclined plane or the spot-on thicker washer is based on the common double-nut opposite-pushing screw, the auxiliary nut is added on the bolt through the partial thickness with one high side and the other low side, the clearance between the internal thread of the auxiliary nut and the external thread of the bolt is utilized to ensure that the internal thread surface of the auxiliary nut and the external thread surface of the bolt, two thread surfaces which are originally mutually parallel and spirally engaged fall off and are mutually inclined and crossed, mutually pried and acted by the lateral force of the spiral, the loosening direction is locked and stretched, so that the friction force between the internal thread of the auxiliary nut and the external thread surface of the bolt is suddenly increased, so that the highest point of the convex point or the inclined plane is a fixed point relative to the bolt and can not rotate, when the main nut rotates backwards, the convex point or the highest point of the inclined plane supports against the auxiliary nut, so that the lateral force of the auxiliary nut is increased, and the purpose of preventing looseness is achieved, and the main nut is screwed tightly and cannot rotate in the loosening direction. If the main nut and the auxiliary nut are twisted on the screw rod of the bolt, the main nut, the auxiliary nut and the bolt are coaxially, tightly and firmly bound into a whole, and the bolt cannot rotate backwards.
Only after the auxiliary nut is loosened by a wrench and other tools, the highest point of the convex point or the inclined plane on the metal washer can be far away from the main nut or the auxiliary nut, the main nut can be loosened again, the bolt can be disassembled finally, the bolt is drawn out from the screw hole of the fastened piece, and the bolt can be repeatedly disassembled and assembled for use.
In summary, the metal washer, the anti-loosening structure and the anti-loosening thread pair have the following advantages:
1. the invention based on the existing fastener has strong universality, and can be formed by directly adding the thicker metal washer of the scheme on the existing double-nut anti-loose structure;
2. the anti-loosening structure comprises four or more parts, and the anti-loosening structure can be used upside down on the screw rod, so that the actual requirement can be met;
3. the scheme has the advantages of simple structure, convenience in processing and production and low cost;
4. the scheme is convenient to install and operate, and does not need special tools;
5. the anti-loosening performance is good, when the auxiliary nut is fastened, the main nut can only be tightened but not loosened, and the main nut does not loosen slightly after vibration;
6. compared with the most similar prior art CN204493402U, the anti-loose structure and the principle of the anti-loose structure are completely different from the principles, the using effect and the processing technology of the anti-loose structure and the principle of the anti-loose structure are completely different, under the condition that the structure of the main nut or the auxiliary nut is not changed, the auxiliary nut, the main nut and the bolt are still in the same axis after being installed, the upper annular plane of the main nut is not in direct contact with the lower annular plane of the auxiliary nut, but a thicker metal washer is added between the upper annular plane of the main nut and the lower annular plane of the auxiliary nut, so that an angle is formed between the main nut and the auxiliary nut, and after full pre-tightening, the top point of the salient point or the top point of the inclined plane is in direct contact with the main nut and the auxiliary nut. When the bolt bears the pre-tightening tension, a small amount of lateral force is borne, the thicker metal washer, the main nut, the auxiliary nut and the bolt are fixed into a whole, a shaft of the bolt is not bent after the bolt is used, the yield strength and the tensile strength are not influenced, after the bolt is pre-tightened, the thicker metal washer, the main nut, the auxiliary nut and the bolt are relatively fastened into a whole, and the bolt cannot be loosened at all, so that the anti-loosening reliability is high, all original accessories are not damaged in the use process, the anti-loosening device is easy to detach and can be repeatedly used, the structure and the processing technology are simple, and the processing cost is very low.
Drawings
FIG. 1 is one of the front views of a somewhat thicker metal washer of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a view of the installation of FIG. 1 in a locking thread pair;
FIG. 4 is a second installation configuration of FIG. 1 in a locking thread pair;
FIG. 5 is an upper oblique view of a secondary nut of the present invention;
FIG. 6 is a schematic sectional view A-A of FIG. 5;
FIG. 7 is a front view of a metal washer of the present invention having a thicker inclined surface;
FIG. 8 is a top view of FIG. 7;
fig. 9 is a third installation structure view of fig. 7 in a locking screw pair.
In the figure:
1. a thick metal washer; 2, a main nut; 3, auxiliary nuts;
4. a bolt; 5, a screw rod; 6, internal threads;
7. an external thread; 8, salient points; bolt head 9;
10. a fixed end; 11, a locking structure; a circular ring plane;
13. a locking thread pair; 14, screw holes; 15, one end of the nut;
16. a metal flat washer body; an annular channel; 18, an annular elastic locking sheet;
19. strip-shaped notches; concave indentation; a locknut;
22. a fastened piece A; a fastened piece B; a thicker metal washer apex;
25. a common nut; 26, combining limit steps; a primary flat washer;
28. a primary spring washer; 29, coating; a hexagonal side;
31. the other end of the nut; a bevel;
33. a gap between the internal thread of the auxiliary nut and the external thread of the screw rod; a belleville washer;
35. a metal washer with a thicker inclined surface; a dotted thicker metal washer; a circular aperture;
38. one end plane of the metal ring; a nut body;
alpha, the upper end surface and the lower end surface form an included angle with each other.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples:
the thicker metal washer 1 can be applied to various opposite-top anti-loosening structures 11 and anti-loosening thread pairs 13.
In fig. 1 to 9, a thicker metal washer 1 includes a flat metal ring having a circular periphery and a coaxial circular hole in the middle, and a thicker inclined surface having a different thickness between the upper and lower end surfaces of the metal washer; the other is that the salient point 8 is arranged on the plane 38 at one end of the metal ring of the existing flat washer, the thickness between the upper end surface and the lower end surface of the metal washer is inclined thicker, the included angle between the two end surfaces is alpha, and alpha is more than 0 degree and less than 30 degrees, or the salient point 8 is pressed on the plane 38 at one end of the metal ring of the existing metal flat washer body 16; or welding a bump 8 fixed on one end plane 38 of the metal ring by using a welding wire or a welding rod made of the same material; or the bumps 8 fixed by gluing. The height of the salient point 8 on the plane 38 at one end of the metal ring is at least 1/10-1 times, such as 1/5 times, 1/4 times, 1/2 times or 1 time, of the pitch of the external thread 7 of the screw 5 sleeved by the round hole 37 of the thicker metal gasket 1; the cross section of the salient point 8 vertical to the height is in any shape, and the radial length of the area is not less than 1/3 times, such as 1/2 times, 1 time and 2 times of the pitch of the external thread 7 of the bolt 4; the shape of the material is one of circular, elliptic, rectangular, trapezoidal, triangular and prismatic.
The internal thread 6 of the auxiliary nut 3 is provided with a coating 29, and the coating 29 is made of rubber or non-drying adhesive and is used for increasing the friction force between the nut and the bolt and preventing the auxiliary nut 3 from being in a free loosening state when vibrating.
In fig. 7-9, one end surface of the thicker metal washer 1 is an inclined surface, or both end surfaces are inclined surfaces, the auxiliary nut 3 is the existing locknut 21, and includes a body nut 39 and an annular elastic locking sheet 18, the annular elastic locking sheet 18 is arranged at the upper end of the nut body 39 and is integrated with the nut body 39; the annular elastic locking piece 18 is bent towards the inner side of the thread of the nut body 39 and forms an annular channel 17 with the nut body 39; the inner diameter of the annular elastic locking piece 18 is smaller than the inner diameter of the threaded part of the nut body 39, or the annular elastic locking piece 18 and the threaded part of the nut body 39 are slightly dislocated in the axial direction or the radial direction. The limit step combination 26 is composed of more than one semicircular step; the strip-shaped notches 19 or the concave indentations 20 are provided with more than 1. The elastic locking piece 18 is either a nylon locking ring or a metal locking ring.
In fig. 3, in the anti-loose structure 11 of the present invention, the main nut 2 is a common nut 25, the auxiliary nut 3 is also a common nut 25, and the internal threads 6 of the main nut 2 and the auxiliary nut 3 are oppositely screwed on the external threads 7 of the screw 5, the two nuts can be exchanged, and the salient point 8 is located at the upper end or the lower end of the thicker metal washer 1 between the main nut 2 and the auxiliary nut 3, or can be reversed. The invention relates to a check thread pair 13, which comprises a thicker metal washer 1, a bolt 4, a check structure 11, a main flat washer 27 or a main elastic washer 28, wherein at least one surface of the thicker metal washer 1 at the lower end of an auxiliary nut 3 is provided with a convex point 8 to form the thicker metal washer 1, a fixed end 10 of the bolt 4 is penetrated into a fastened piece B23, a fastened piece A22, a main flat washer 27, a main elastic washer 28 and a screw hole 14 of the main nut 2, is screwed down according to preset torque, is penetrated into a round hole 37 of the thicker metal washer 1, is screwed up on an exposed external thread 7 of the bolt 4 to form the auxiliary nut 3, and when the auxiliary nut 3 or the main nut 2 is screwed up to be in contact with the convex point 8 of the thicker metal washer 1, a certain pre-tightening torque is applied, and the internal thread of the main nut 2 is tightly fixed on the external thread 7 of the bolt 4, so that the thicker metal washer 1, the bolt 4, the main flat washer 27, the main elastic washer 2 and the main elastic washer 2 are in a tight fit mode, The main nut 2, the auxiliary nut 3, the main flat washer 27, the main elastic washer 28, the fastened nail 22 and the fastened piece 23 are firmly fastened together. After the main nut 2 and the auxiliary nut 3 are respectively pre-tightened, due to the effect of adding the top point 24 of the thicker metal washer 1, the gap 33 between the internal thread 6 of the auxiliary nut 3 and the external thread 7 of the bolt 4 is utilized, so that the internal thread 6 of the auxiliary nut 3 falls on the external thread 7 of the screw rod 5, the upper ring plane 12 of the main nut 2 and the lower ring plane 12 of the auxiliary nut 3 form an included angle alpha, the auxiliary nut 3 is enabled to fall sufficiently, the lock is locked on the external thread 7 of the screw rod 5, and the lock cannot be rotated backwards.
In fig. 4, the main nut 2 is a nut 1 according to the present invention, the auxiliary nut 3 is a normal nut 25, the convex point 8 is disposed between the auxiliary nut 3 and the thicker metal washer 1 and is integrated with the metal flat washer body 16 of the thicker metal washer 1, the auxiliary nut 3 or the internal thread 6 is provided with a coating 29 for preventing the auxiliary nut 3 from loosening freely, and other structures and principles are the same as those described in fig. 3.
In fig. 7-9, an annular elastic locking piece 18, such as a nylon locking ring or an inlaid metal locking ring, is inlaid at one end of the auxiliary nut 3 or the nut body 39, a tilted thicker metal washer 35 and a tilted surface 32 are arranged between the auxiliary nut 3 and the main nut 2, and an included angle α formed by the upper end surface and the lower end surface is 5 °, 10 °, 15 ° and 30 ° to form the thicker metal washer 1 of the present invention, the locknut 21 of the auxiliary nut 3 is used for preventing the auxiliary nut 3 from loosening freely, and other installation structures and principles are the same as those in fig. 3 and are not repeated.
A main flat washer 27 or a main spring washer 28 is respectively arranged between the anti-loose structure 11 and the fastened piece A22, and the main flat washer 27 is positioned between the main spring washer 28 and the fastened piece A22; or no gasket is arranged; the main elastic washer 28 is either an existing open circular spring washer, an existing conical disc-shaped elastic washer 34, an existing spherical disc-shaped elastic washer 34 or any one of the existing elastic washers.
The main spring washer 28, the main flat washer 27, the common nut 25, the locknut 21 and the bolt 4 are all the existing mature technologies, and the structure, the working principle, the material, the specification and the selecting method thereof are all mastered by the ordinary skilled person in the field, and the description thereof is not repeated here.
The three mounting modes respectively correspond to different thicknesses, different materials and different specifications of the metal gasket with the excessive thickness, the bolt 4, the main nut 2, the auxiliary nut 3, the metal gasket 1 with the salient point 8 or the inclined plane and the four mounting modes to achieve the same anti-loosening purpose, and the vertex 24 of the metal gasket with the excessive thickness is in contact with the upper annular plane 12 of the main nut 2; or with the lower annular flat 12 of the auxiliary nut 3, which functions in the same way.
Experiments prove that: when the main nut 2 is retreated, the vertex 24 of the thicker metal washer enables the auxiliary nut 3 to be spirally and obliquely arranged on the external thread 7 of the screw rod 5 of the bolt 4, the retreating direction is locked in a unidirectional rotation mode, the vertex 24 of the thicker metal washer tightly props against the spiral ascending of the main nut 2, if the main nut 2 and the auxiliary nut 3 are screwed down by certain torque which can be large or small, the two nuts are locked in a bidirectional mode, and the main nut 2 cannot be loosened.
The invention relates to a thicker metal gasket 1, which comprises a metal flat gasket body 16, wherein fixed salient points 8 are arranged on the metal flat gasket body 16, the formed thicker metal gasket 36 with points and an inclined plane thicker metal gasket 35 are made of stainless steel, carbon steel, manganese steel, alloy steel, iron or copper and other metals, and the formed metal gasket, the anti-loose structure and the anti-loose thread pair are used in the vibration anti-loose fastening field of railways, bridges, mines, aviation, spaceflight, navigation, iron towers, wind power, nuclear power, vehicles, war industry, vibrating machinery, facilities and the like.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications to the embodiments of the present disclosure, or equivalent substitutions for some features, may be made without departing from the spirit of the present disclosure, which should be considered to be within the scope of the claims.
Claims (10)
1. The utility model provides a metal gasket, includes that the periphery is circular, the centre is coaxial round hole, the flat becket of constitution, its characterized in that:
the metal gasket is a thicker metal gasket (1), and the upper end surface and the lower end surface of the metal gasket are not parallel.
2. The metal gasket as set forth in claim 1, wherein: the thickness between the upper end surface and the lower end surface of the thicker metal gasket (1) is an inclined plane thicker metal gasket (35);
the upper end face and the lower end face of the metal ring of the inclined plane thicker metal washer (35) form an included angle alpha, and alpha is more than 0 degree and less than 30 degrees;
the included angle alpha formed by the upper end surface and the lower end surface is a pair of acute angles in four dihedral angles formed by the upper end surface and the lower end surface, and the geometric father Euclidean definition angle is the relative inclination of two non-parallel straight lines in the planes;
one of the calculation methods for forming an included angle α between the upper end surface and the lower end surface is as follows: firstly, finding out an intersection line of the upper end surface and the lower end surface, and respectively making a perpendicular line of the intersection line in the two surfaces, wherein an included angle of the two lines is an included angle alpha of the upper end surface and the lower end surface; the second method is as follows: the two planes do not want to intersect, the two planes are first extended until they intersect, and then the steps of the first method are repeated;
the plane angle is characterized in that any point on an edge of a dihedral angle is used as an end point, two rays perpendicular to the edge are respectively made in two planes, and an angle formed by the two rays is called a plane angle alpha of the dihedral angle; or, rays perpendicular to the edges are respectively made in two half planes from any point on the edges of the dihedral angle, and the angle formed by the two rays is called the plane angle alpha of the dihedral angle.
3. The metal gasket as set forth in claim 1, wherein: the thicker metal gasket (1) is a thicker metal gasket (36) with a point, wherein at least one end face of the thicker metal gasket is fixedly connected with a salient point (8);
the strip point thicker metal gasket (36) comprises a flat metal ring which is circular at the periphery and coaxial in the middle, wherein two end faces of the metal ring are parallel to each other to form a metal gasket body (16), and the metal gasket is characterized in that:
one end plane of the metal ring is respectively contacted with the circular ring plane of the main nut or the auxiliary nut, and any position on the other end plane of the metal ring is provided with a salient point (8);
the salient points (8) and the metal gasket body (16) are fixed into a whole.
4. The metal gasket as set forth in claim 3, wherein: the height of the salient point (8) is at least 1/10-1 times of the pitch of the external thread (7) of the screw rod (5) sleeved with the inner circle of the metal gasket (36) with the point and the thickness; the radial length of the bottom area of the salient point (8) is not less than 1/3 times of the pitch of the external thread (7) of the sleeved screw (5).
5. A metal gasket according to claim 4, wherein: the cross section of the salient point (8) perpendicular to the height of the salient point is of any shape.
6. A metal gasket according to claim 5, wherein: the cross section of the salient point (8) perpendicular to the height thereof is in any shape of circle, ellipse, rectangle, trapezoid, triangle or prism.
7. A metal gasket according to claims 3-6, wherein: the salient point (8) and the metal gasket body (16) are punched into a whole by a die; or welded as one; or integrally bonded by glue.
8. A locking structure comprises
The main nut (2) is a common nut (25) and is used for screwing the fixed end (10) of the bolt (4),
the auxiliary nut (3) is a common nut (25) or a locknut (21) and is used for being screwed at the fixed end of the bolt (4) and positioned at the outer side of the main nut (2),
the external thread (7) of the screw rod (5) of the bolt (4) is used for coaxially screwing the internal thread (6) of the main nut (2) and the auxiliary nut (3),
the method is characterized in that:
the coaxial inclined plane thicker metal washer (35) is clamped between the main nut (2) and the auxiliary nut (3); or sandwiching said point-on-thickness metal washer (36) coaxial therewith;
when the salient points (8) of the metal washer (36) with the point thickness are arranged between the metal flat washer body (16) and the circular ring plane (12) at the upper end of the main nut (2), the vertexes (24) of the salient points (8) are in spiral point contact with the circular ring plane (12) at the upper end of the main nut (3) screwed on the bolt (4);
or when the salient point (8) of the metal gasket (36) with the point thickness is positioned between the metal flat gasket body (16) and the circular ring plane (12) at the lower end of the auxiliary nut (3), the vertex (24) of the salient point (8) is in spiral point contact with the circular ring plane (12) at the lower end of the auxiliary nut (2) screwed on the bolt (4);
when the vertex (24) of the salient point (8) on the thicker metal washer (1) is in spiral point contact with the circular ring plane (12) at one end of the other nut, the main nut (2) utilizes the gap (33) between the internal thread (6) of the auxiliary nut (3) and the external thread (7) of the bolt (4) under the action of the vertex (24) of the salient point on the thicker metal washer (1) to enable the surface of the internal thread (6) of the auxiliary nut (3) and the surface of the external thread (7) of the bolt (4) to be inclined, the auxiliary nut (3) is locked in a one-way rotation mode in the loosening direction, the vertex (24) with the highest inclined surface or the salient point (8) blocks the main nut (2), and the main nut (2) can only be screwed but cannot be loosened to play a role in stopping and preventing loosening;
or the main nut (2) and the auxiliary nut (3) are twisted together with a certain pretightening force, and the main nut (2) and the auxiliary nut (3) are locked in a bidirectional spiral mode through the locknut structure (11) and are fixed on the screw rod (5) of the bolt (4).
9. A metal gasket according to claim 1, wherein: the common nut (25) is a fixing tool, the center of the common nut is provided with a hole, the inner side of the hole is provided with threads, the periphery of the hole is provided with symmetrical regular hexagonal edges or square edges, the regular hexagonal edges or the square edges are spirally connected with the external threads (7) of the bolt (4) with the same specification through the internal threads (6) of the round hole, a fastened piece A (22) and a fastened piece B (23) are spirally fastened between the bolt head (9) and the common nut (25), and the two ends of the common nut are provided with circular ring planes (12) which are parallel to each other and vertical to the axis of the screw hole (14);
the anti-loose nut (21) comprises a nut body (39) and an annular elastic locking sheet (18), the annular elastic locking sheet (18) is arranged at the other end (31) of the nut body (39) and is of an integrated structure with the nut body (39), the annular elastic locking sheet (18) is bent towards the inner side of the screw thread of the nut body (39) and forms an annular channel (17) with the nut body (39); the inner diameter of the annular elastic locking piece (18) is smaller than the inner diameter of the internal thread (6) part of the nut body (39), or the annular elastic locking piece (18) and the internal thread (6) part of the nut body (39) are slightly dislocated in the axial direction or the radial direction. The annular elastic locking sheet (18) is a nylon locking ring or a metal locking ring;
the internal thread (6) of the screw hole (14) of the common nut (25) is provided with a coating (29), and the coating (29) is coated with rubber or non-drying adhesive substances.
10. Locking screw thread is vice, its characterized in that: comprises that
One end of the bolt (4) is a bolt head (9), and the other end of the bolt is a fixed end (10); the anti-loosening structure (11) is arranged at the fixed end (10) of the bolt (4); wherein a fastened piece A (22) and a fastened piece B (23) are installed and fastened between the bolt head (9) and the anti-loosening structure (11);
a main flat washer (27) or a main elastic washer (28) is respectively arranged between the anti-loose structure (11) and the fastened piece A (22), and the main flat washer (27) is positioned between the main elastic washer (28) and the fastened piece A (22);
the main elastic washer (28) is an open circular spring washer, or a conical disc-shaped elastic washer (34), or a spherical disc-shaped elastic washer (34), or one of any elastic washers;
the anti-loose structure (11) and the fastened piece A (22) are arranged, or no gasket is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210663770.9A CN114876938A (en) | 2022-05-28 | 2022-05-28 | Metal washer, anti-loosening structure thereof and anti-loosening thread pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210663770.9A CN114876938A (en) | 2022-05-28 | 2022-05-28 | Metal washer, anti-loosening structure thereof and anti-loosening thread pair |
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| Publication Number | Publication Date |
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| CN114876938A true CN114876938A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210663770.9A Pending CN114876938A (en) | 2022-05-28 | 2022-05-28 | Metal washer, anti-loosening structure thereof and anti-loosening thread pair |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115912186A (en) * | 2022-12-15 | 2023-04-04 | 广东鑫源恒业电力线路器材有限公司 | Special wire clamping device for carbon fibers and preparation process of wire clamping device |
-
2022
- 2022-05-28 CN CN202210663770.9A patent/CN114876938A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115912186A (en) * | 2022-12-15 | 2023-04-04 | 广东鑫源恒业电力线路器材有限公司 | Special wire clamping device for carbon fibers and preparation process of wire clamping device |
| CN115912186B (en) * | 2022-12-15 | 2023-07-25 | 广东鑫源恒业电力线路器材有限公司 | Wire clamping device special for carbon fiber composite core wire and preparation process thereof |
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