CN215805678U - Deng type permanent locknut assembly - Google Patents
Deng type permanent locknut assembly Download PDFInfo
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- CN215805678U CN215805678U CN202023070677.2U CN202023070677U CN215805678U CN 215805678 U CN215805678 U CN 215805678U CN 202023070677 U CN202023070677 U CN 202023070677U CN 215805678 U CN215805678 U CN 215805678U
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Abstract
The utility model relates to the technical field of fasteners, in particular to a Deng type permanent locknut assembly. The utility model comprises a bolt, a lock nut compression nut and an elastic clamping piece stop washer; the elastic clamping piece stop washer is positioned between the compression nut and the locking nut; the elastic clamping piece stop washer comprises a washer body, the lower surface of the washer body is attached to the top surface of the locking nut, and the upper surface of the washer body is abutted to the bottom surface of the compression nut; the middle part of the gasket body is provided with a round hole for a bolt to penetrate, the edge of the round hole faces one side of the compression nut and extends towards the inner necking of the round hole to form an arc-shaped clamping piece, the arc-shaped clamping piece positioned on the left side of the round hole is a first arc-shaped clamping piece, the arc-shaped clamping piece positioned on the right side of the round hole is a second arc-shaped clamping piece, the first arc-shaped clamping piece is clamped in a thread groove of the bolt, and the second arc-shaped clamping piece is clamped at the top of a thread of the bolt; the elastic clamping piece stop washer is clamped and fixed on the bolt through the first arc-shaped clamping piece and the second arc-shaped clamping piece, and permanent looseness prevention of the locknut is achieved.
Description
Technical Field
The utility model relates to the technical field of fasteners, in particular to a Deng type permanent locknut assembly.
Background
Bolt and nut connection is a very common connection mode in the technical field of machinery, and is widely applied in the fields of automobiles, aerospace, rail transit, production equipment manufacturing and the like. The bolt-nut connection can generate self-loosening in a working environment with high-strength impact load, high-strength alternating load and severe temperature change.
The existing nut anti-loosening methods comprise three methods: the friction anti-loosening, the mechanical anti-loosening and the permanent anti-loosening are generally performed in a spot welding, riveting and bonding mode, but the spot welding, riveting and bonding processes are complex and are not easy to operate.
A commonly used locknut on the market today is the hardlock nut. The anti-loosening principle of the Hardelock nut is as follows: firstly, the nuts are matched in pairs and used and are divided into concave nuts and convex nuts, the convex nuts are firstly installed below, eccentric conical surfaces adopted for machining the convex nuts are machined when the convex nuts are manufactured, the concave nuts are installed above, the concave nuts are machined on the non-eccentric conical surfaces, when the two convex and concave nuts are screwed together, the outer sides of the eccentric conical surfaces of the convex nuts are tightly matched with the parts of the non-eccentric conical surfaces of the concave nuts, just like a wedge is inserted into the nuts, the friction torque is extremely large, and therefore the anti-loosening effect is achieved. However, the convex nut with the eccentric tapered surface has extremely high requirements for processing and high manufacturing cost.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a dune type permanent locknut assembly, which has the characteristics of convenient processing, strong reliability and simple installation.
In order to achieve the purpose, the dune type permanent anti-loose nut assembly comprises a bolt and a lock nut screwed on the bolt, wherein the bolt is provided with an outward convex thread tooth and an inward concave thread groove; the clamping device is characterized by further comprising a compression nut and an elastic clamping piece stop washer, wherein the elastic clamping piece stop washer and the compression nut are sequentially arranged on the bolt, and the elastic clamping piece stop washer is positioned between the compression nut and the locking nut;
the elastic clamping piece stop washer comprises a washer body, the lower surface of the washer body is attached to the top surface of the locking nut, and the upper surface of the washer body is abutted to the bottom surface of the compression nut; the middle part of the gasket body is provided with a round hole for a bolt to penetrate through, the edge of the round hole faces one side of the compression nut and extends towards the inner necking of the round hole to form an arc-shaped clamping piece, and the arc-shaped clamping piece is provided with an upper edge positioned at the top, a lower edge positioned at the bottom and side edges positioned at two sides; the arc-shaped card positioned on the left side of the round hole is a first arc-shaped card, the arc-shaped card positioned on the right side of the round hole is a second arc-shaped card, the central axes of the first arc-shaped card and the second arc-shaped card are overlapped, the upper edges of the first arc-shaped card and the second arc-shaped card are both arc-shaped, the arc radius of the upper edge of the second arc-shaped card is larger than that of the upper edge of the first arc-shaped card, the upper edge of the second arc-shaped card is positioned above the upper edge of the first arc-shaped card, the upper edge of the first arc-shaped card is clamped in the thread groove of the bolt, and the upper edge of the second arc-shaped card is clamped at the top of the thread of the bolt; the elastic clamping piece stop washer is fixedly clamped on the bolt through the first arc-shaped clamping piece and the second arc-shaped clamping piece, so that the permanent anti-loosening of the locknut is realized;
the bottom surface of the compression nut is recessed inwards to form a groove for containing the arc-shaped clamping piece of the elastic clamping piece stop washer.
Preferably, the left end of the washer body is bent towards one side of the lock nut to form a first stop lug, the right end of the washer body is bent towards one side of the compression nut to form a second stop lug, the first stop lug is attached to the side wall of the lock nut, and the second stop lug is attached to the side wall of the compression nut.
Preferably, the upper edge of the first arc-shaped clamping piece is clamped in the thread groove of the bolt, the upper edge of the second arc-shaped clamping piece is clamped at the top of the thread tooth adjacent to the thread groove, and the height difference between the upper edge of the first arc-shaped clamping piece and the upper edge of the second arc-shaped clamping piece is smaller than the thread pitch of the bolt.
As preferred scheme, first arc card and second arc card all are equipped with one, just the lower limb of first arc card and the lower limb of second arc card are semi-circular.
Preferably, the side edges of the two sides of the first arc-shaped clamping piece correspond to the side edges of the two sides of the second arc-shaped clamping piece respectively and are integrally formed.
Preferably, gaps are arranged between the side edges of the two sides of the first arc-shaped clamping piece and the side edges of the two sides of the second arc-shaped clamping piece respectively.
As preferred scheme, the arc card is equipped with four altogether, and wherein first arc card is equipped with two, and second arc card all is equipped with two, and two first arc cards set up in the left side of packing ring body, and two second arc cards set up on the right side of packing ring body, and four arc cards evenly arrange along the circumference of round hole, and all are equipped with the clearance between two adjacent arc cards.
Preferably, the arc radius of the upper edge of the first arc-shaped clamping piece is slightly smaller than the radius of a thread groove of the bolt, and the arc radius of the upper edge of the second arc-shaped clamping piece is slightly smaller than the radius of the top of a thread tooth of the bolt, so that the elastic pre-tightening force of the first arc-shaped clamping piece and the second arc-shaped clamping piece on the bolt is increased.
Preferably, the resilient card retainer washer is stamped and formed from a high strength thin steel sheet.
Preferably, the side wall of the groove of the compression nut is in a circular arc curved surface shape.
Compared with the prior check bolt and nut assembly, the utility model has the advantages that:
the elastic clamping piece locking washer is provided with the first locking lug and the second locking lug, so that the elastic clamping piece locking washer, the compression nut and the locking nut are linked to form a whole; and be equipped with first arc card and second arc card on elasticity card lock washer, wherein the circular arc radius of first arc card and second arc card is different, make first arc card block in the screw thread slot of bolt, second arc card blocks at the top of the screw thread tooth of bolt, the screw thread that leads to first arc card and the combination of second arc card to form and the screw thread of bolt have the difference of tooth pitch and screw thread nominal diameter, if tooth pitch and screw thread nominal diameter are different, nut and screw rod just can't the pivoted principle, consequently, elasticity card lock washer blocks to die and can't rotate on the bolt, because elasticity card lock washer and gland nut, lock nut linkage form a whole, consequently, elasticity card lock washer and gland nut, lock nut all blocks and can't rotate on the bolt, realize permanent locking function.
2, the bolt in the Deng type permanent locknut component is a common bolt, the lock nut is also a common nut, only an elastic card stop washer and a gland nut are needed to be added, wherein the gland nut only needs to process a groove for accommodating the arc card without eccentric processing, in addition, the arc card of the elastic card stop washer is arc-shaped, and does not have eccentric processing, and the Deng type permanent locknut component can be produced by adopting common punch precision processing.
Drawings
FIG. 1 is a partially cut-away perspective view of a Deng-type permanent locknut assembly of the present invention;
FIG. 2 is a schematic structural view of the compression nut of FIG. 1;
FIG. 3 is a full cross-sectional view of a Deng-type permanent locknut assembly of the present invention;
FIG. 4 is an enlarged view of portion I of FIG. 3;
FIG. 5 is a perspective view of the elastic card lock washer in example 1;
FIG. 6 is a perspective view of the elastic card lock washer according to embodiment 2;
the components in the figures are numbered as follows: the bolt 10, the thread ridge 11, the thread groove 12, the compression nut 20, the groove 21, the lock nut 30, the elastic clamping piece stop washer 40, the washer body 41, the round hole 42, the arc-shaped clamping piece 43, the upper edge 43a, the lower edge 43b, the side edge 43c, the first arc-shaped clamping piece 44, the second arc-shaped clamping piece 45, the first stop lug 46, the second stop lug 47 and the gap 48.
Detailed Description
For a better understanding of the present invention, the following detailed description of the present invention is provided in connection with specific examples.
Example 1:
referring to fig. 1, a dune type permanent locknut assembly includes a bolt 10, a lock nut 30, a compression nut 20, and an elastic card lock washer 40; the lock nut 30, the elastic card lock washer 40 and the compression nut 20 are sequentially screwed on the bolt 10 from bottom to top.
As shown in fig. 4, the bolt 10 has an outwardly protruding thread ridge 11 and an inwardly recessed thread groove 12.
Referring to fig. 3 and 5, the elastic card stopping washer 40 is formed by stamping a high-strength thin steel plate, the elastic card stopping washer 40 includes a washer body 41, a lower surface of the washer body 41 is attached to the top surface of the lock nut 30, an upper surface of the washer body 41 is abutted to the bottom surface of the press nut 20, a circular hole 42 for the bolt 10 to penetrate is formed in the middle of the washer body 41, an edge of the circular hole 42 extends toward one side of the press nut 20 and inward of the circular hole 42 to form an arc-shaped card 43, the arc-shaped card 43 has an upper edge 43a at the top, a lower edge 43b at the bottom and side edges 43c at both sides, the arc-shaped card 43 at the left side of the circular hole 42 is a first arc-shaped card 44, the arc-shaped card 43 at the right side of the circular hole 42 is a second arc-shaped card 45, the first arc-shaped card 44 and the second arc-shaped card 45 are both provided with one piece, and the lower edge 43b of the first arc-shaped card 44 and the lower edge 43b of the second arc-shaped card 45 are both semicircular, the upper edges 43a of the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 are both in a semi-circular arc shape, the arc radius of the upper edge 43a of the second arc-shaped clamping piece 45 is larger than that of the upper edge 43a of the first arc-shaped clamping piece 44, the upper edge 43a of the second arc-shaped clamping piece 45 is positioned above the upper edge 43a of the first arc-shaped clamping piece 44, as shown in fig. 4, the upper edge 43a of the first arc-shaped clamping piece 44 is clamped in the thread groove 12 of the bolt 10, the upper edge 43a of the second arc-shaped clamping piece 45 is clamped at the top of the thread 11 of the bolt 10, the height difference Δ h between the upper edge 43a of the first arc-shaped clamping piece 44 and the upper edge 43a of the second arc-shaped clamping piece 45 is clamped at the top of the thread 12 adjacent to the thread groove 12, the arc radius of the upper edge 43a of the first arc-shaped clamping piece 44 is slightly smaller than that of the thread groove 11 of the bolt 10, the arc radius of the upper edge 43a of the second arc-shaped clamping piece 45 is slightly smaller than the radius of the top of the thread 12 of the bolt 10, so as to increase the elastic pre-tightening force of the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 to the bolt 10, the side edges 43c of the two sides of the first arc-shaped clamping piece 44 are respectively and correspondingly formed with the side edges 43c of the two sides of the second arc-shaped clamping piece 45 in an integrated manner, namely, the side edge 43c of one side of the first arc-shaped clamping piece 44 is formed with the side edge 43c of one side of the second arc-shaped clamping piece 45 opposite to the first arc-shaped clamping piece 44 in an integrated manner without a gap, and the side edge 43c of the other side of the first arc-shaped clamping piece 44 is formed with the side edge 43c of one side of the second arc-shaped clamping piece 45 opposite to the first arc-shaped clamping piece without a gap. The left end of the washer body 41 is bent towards one side of the lock nut 30 to form a first stop lug 46, the right end of the washer body 41 is bent towards one side of the compression nut 20 to form a second stop lug 47, the first stop lug 46 is attached to the side wall of the lock nut 30, the second stop lug 47 is attached to the side wall of the compression nut 20, and the lock nut 30, the elastic clamping sheet stop washer 40 and the compression nut 20 are integrated through the first stop lug 46 and the second stop lug 47 to further increase the anti-loose performance.
Referring to fig. 2, the bottom surface of the compression nut 20 is recessed to form a recess 21 for receiving the arcuate tab 43 of the resilient tab stop washer 40, and the side walls of the recess 21 are curved.
The installation process of the dune type permanent locknut assembly of the embodiment is as follows: firstly, a locking nut 30 is locked on a bolt 10 by using pretightening force, then an elastic card stop washer 40 is sleeved in a compression nut 20, the compression nut 20 is screwed into the bolt 10 by using external force, vertical downward external force is applied to the elastic card stop washer 40 in the process that the compression nut 20 is screwed downwards to ensure that the lower surface of the elastic card stop washer 40 is attached to the upper surface of the locking nut 30, finally, one side of the elastic card stop washer 40 is bent downwards to be attached to the outer side wall of the locking nut 30, the other side of the elastic card stop washer 40 is bent upwards to be attached to the outer side wall of the compression nut 20, and the installation process is completed.
The principle of the embodiment: the compression nut 20 is used for conveniently compressing the elastic card stop washer 40 on the lock nut 30 during installation, because the radius of the upper edge of the first arc-shaped card 44 on the elastic card stop washer 40 is smaller than the maximum radius of the thread of the bolt, external force needs to be applied to move the elastic card stop washer 40 downwards on the bolt, and because the elastic card stop washer 40 has certain elasticity, the elastic card stop washer 40 vertically moves downwards under the pushing of the rotating force of the compression nut until the lower surface of the elastic card stop washer 40 is jointed with the upper surface of the lock nut.
After the lower surface of elasticity card lock washer 40 and lock nut's upper surface laminating, unable vertical upward movement, its principle is: although the arc-shaped locking piece 43 has a certain elasticity, since the arc-shaped locking piece 43 is inwardly tapered and similar to a claw shape, it can only move vertically downward by its elasticity and cannot move vertically upward, and the upper surface of the elastic locking piece stopper washer 40 is attached to the bottom surface of the compression nut and then cannot move vertically upward.
Elastic card lock washer 40 is with lock nut's upper surface laminating back, unable rotary motion, and its principle is: because the upper edges of the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 are both arc-shaped, and the arc radiuses of the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 are different, the nominal diameter of the thread formed by the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 is different from the nominal diameter of the thread on the bolt; in addition, since the first arc-shaped clamping piece 44 is clamped in the thread groove 12 of the bolt 10 and the second arc-shaped clamping piece 45 is clamped on the top of the thread ridge 11 of the bolt 10, the pitch between the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 is smaller than that of the bolt or larger than that of the bolt and cannot be equal to that of the bolt; to sum up, the thread formed by the combination of the first arc-shaped clamping piece 44 and the second arc-shaped clamping piece 45 has a pitch difference and a thread nominal diameter difference with the thread on the bolt, and if the pitch difference is different from the thread nominal diameter, the nut and the screw cannot rotate, so the elastic clamping piece stop washer 40 is clamped on the bolt and cannot rotate.
In summary, the resilient card stop washer 40 cannot rotate nor move vertically upward, it can only be locked over the lock nut 30, so the lock nut 30 is permanently locked.
Example 2
Embodiment 2 is different from embodiment 1 in that a gap 48 is provided between the arc-shaped clamping pieces 43 in the elastic clamping piece stopping washer 40 to increase the elasticity of the arc-shaped clamping pieces 43, so that the arc-shaped clamping pieces 43 move down better vertically, as shown in fig. 6, the arc-shaped clamping pieces 43 are provided with four pieces in total, wherein the first arc-shaped clamping pieces 44 are provided with two pieces, the second arc-shaped clamping pieces 45 are provided with two pieces, the two pieces of the first arc-shaped clamping pieces 44 are provided on the left side of the washer body 41, the two pieces of the second arc-shaped clamping pieces 45 are provided on the right side of the washer body 41, the four pieces of the arc-shaped clamping pieces 43 are uniformly arranged along the circumferential direction of the circular hole, and a gap 48 is provided between the two adjacent arc-shaped clamping pieces 43.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A Deng type permanent anti-loose nut assembly comprises a bolt (10) and a lock nut (30) screwed on the bolt (10), wherein the bolt (10) is provided with an outward convex thread ridge (11) and an inward concave thread groove (12); the clamping device is characterized by further comprising a compression nut (20) and an elastic clamping piece stop washer (40), wherein the elastic clamping piece stop washer (40) and the compression nut (20) are sequentially arranged on a bolt, and the elastic clamping piece stop washer (40) is located between the compression nut (20) and the locking nut (30);
the elastic clamping piece stop washer (40) comprises a washer body (41), the lower surface of the washer body (41) is attached to the top surface of the lock nut (30), and the upper surface of the washer body (41) is abutted to the bottom surface of the compression nut (20); the middle part of the gasket body (41) is provided with a round hole (42) for a bolt (10) to penetrate, the edge of the round hole (42) faces one side of the compression nut (20) and extends towards the inner contraction opening of the round hole (42) to form an arc-shaped clamping piece (43), and the arc-shaped clamping piece (43) is provided with an upper edge (43a) positioned at the top, a lower edge (43b) positioned at the bottom and side edges (43c) positioned at two sides; the arc-shaped card (43) positioned on the left side of the round hole (42) is a first arc-shaped card (44), the arc-shaped card (43) positioned on the right side of the round hole (42) is a second arc-shaped card (45), the first arc-shaped card (44) is overlapped with the central axis of the second arc-shaped card (45), the upper edges (43a) of the first arc-shaped card (44) and the second arc-shaped card (45) are arc-shaped, the arc radius of the upper edge (43a) of the second arc-shaped card (45) is larger than that of the upper edge (43a) of the first arc-shaped card (44), the upper edge (43a) of the second arc-shaped card (45) is positioned above the upper edge (43a) of the first arc-shaped card (44), the upper edge (43a) of the first arc-shaped card (44) is clamped in the thread groove (12) of the bolt (10), and the upper edge (43a) of the second arc-shaped card (45) is clamped in the thread tooth (11) of the bolt (10) A top portion of (a); the elastic clamping piece stop washer (40) is clamped and fixed on the bolt (10) through a first arc-shaped clamping piece (44) and a second arc-shaped clamping piece (45) to realize permanent anti-loosening of the locknut;
the bottom surface of the compression nut (20) is recessed inwards to form a groove (21) for accommodating an arc-shaped clamping piece (43) of the elastic clamping piece stop washer (40).
2. The dune type permanent anti-loose nut assembly according to claim 1, wherein the left end of the washer body (41) is bent to one side of the lock nut (30) to form a first stop lug (46), the right end of the washer body (41) is bent to one side of the compression nut (20) to form a second stop lug (47), the first stop lug (46) is attached to the side wall of the lock nut (30), and the second stop lug (47) is attached to the side wall of the compression nut (20).
3. The dune type permanent locknut assembly of claim 1, characterized in that the upper edge (43a) of the second arc-shaped card (45) is clamped on the top of the thread (11) adjacent to the thread groove (12), and the difference in height between the upper edge (43a) of the first arc-shaped card (44) and the upper edge (43a) of the second arc-shaped card (45) is smaller than the pitch of the bolt (10).
4. The dune type permanent locknut assembly of claim 1, wherein the first arc-shaped clamping piece (44) and the second arc-shaped clamping piece (45) are both provided with one piece, and the lower edge (43b) of the first arc-shaped clamping piece (44) and the lower edge (43b) of the second arc-shaped clamping piece (45) are both semicircular.
5. The dune type permanent locknut assembly of claim 4, wherein the side edges (43c) of the two sides of the first arc-shaped clamping piece (44) are respectively and integrally formed with the side edges (43c) of the two sides of the second arc-shaped clamping piece (45).
6. The dune type permanent locknut assembly of claim 4, wherein a gap (48) is provided between the side edges (43c) of the first arc-shaped card (44) and the side edges (43c) of the second arc-shaped card (45).
7. The dune type permanent locknut assembly of claim 1, wherein the arc-shaped clamping pieces (43) are provided with four pieces in total, wherein the first arc-shaped clamping pieces (44) are provided in two pieces, the second arc-shaped clamping pieces (45) are provided in two pieces, the two first arc-shaped clamping pieces (44) are provided on the left side of the gasket body (41), the two second arc-shaped clamping pieces (45) are provided on the right side of the gasket body (41), the four arc-shaped clamping pieces (43) are uniformly arranged along the circumferential direction of the circular hole, and a gap (48) is provided between each two adjacent arc-shaped clamping pieces (43).
8. The dune style permanent locknut assembly of claim 1, characterized in that the arc radius of the upper edge (43a) of the first arc-shaped clamping piece (44) is slightly smaller than the radius of the thread groove (12) of the bolt (10), and the arc radius of the upper edge (43a) of the second arc-shaped clamping piece (45) is slightly smaller than the radius of the top of the thread (11) of the bolt (10) to increase the elastic pretension of the bolt (10) by the first arc-shaped clamping piece (44) and the second arc-shaped clamping piece (45).
9. A Dun-type permanent locknut assembly according to any one of claims 1 to 8, characterized in that the elastic snap-in retainer washer (40) is stamped and formed from a high-strength thin steel plate.
10. The dune type permanent locknut assembly according to any one of claims 1 to 8, wherein the side walls of the recess (21) of the gland nut (20) are curved in the shape of a circular arc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023070677.2U CN215805678U (en) | 2020-12-18 | 2020-12-18 | Deng type permanent locknut assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023070677.2U CN215805678U (en) | 2020-12-18 | 2020-12-18 | Deng type permanent locknut assembly |
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| CN215805678U true CN215805678U (en) | 2022-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115349347A (en) * | 2021-12-16 | 2022-11-18 | 特外易(株) | Combined blade structure for mowing |
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2020
- 2020-12-18 CN CN202023070677.2U patent/CN215805678U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115349347A (en) * | 2021-12-16 | 2022-11-18 | 特外易(株) | Combined blade structure for mowing |
| WO2023219184A1 (en) * | 2021-12-16 | 2023-11-16 | 투와이테크 주식회사 | Joint blade for mowing |
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