CN116292576A

CN116292576A - Double-nut anti-loose assembly

Info

Publication number: CN116292576A
Application number: CN202310281451.6A
Authority: CN
Inventors: 杨人凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-06-23

Abstract

The invention discloses a double-nut anti-loosening assembly which comprises a connecting rod, a main nut and an auxiliary nut, wherein a first stud section and a second stud section are sequentially arranged on the connecting rod from top to bottom, the outer diameter of the first stud section is smaller than that of the second stud section, the screw thread pitch of the first stud section is smaller than that of the second stud section, a first screw hole which can be in threaded connection with the second stud section is arranged on the main nut, a second screw hole which can be in threaded connection with the first stud section is arranged on the auxiliary nut, an anti-loosening structure which can limit loosening of the auxiliary nut is arranged between the main nut and the auxiliary nut, the screw thread pitches of the first stud section and the second stud section are smaller than those of the second stud section, and the screw threads of the first screw hole and the second screw hole are in the same rotation direction or in different rotation directions, so that the anti-loosening effect of the auxiliary nut can be limited by the anti-loosening structure, the following rotation of the main nut and the auxiliary nut is limited, and the anti-loosening effect of the auxiliary nut is better realized.

Description

Double-nut anti-loose assembly

Technical Field

The invention relates to the technical field of fasteners, in particular to a double-nut anti-loosening assembly.

Background

The bolts and nuts are used as common detachable fastening parts, and are widely applied to mechanical equipment in various fields, and when the mechanical equipment is used, the mechanical equipment is often accompanied with strong vibration or irregular strong fluctuation environment, so that the nuts are easy to loosen and fall off, and some mechanical accidents and safety accidents are caused by loosening and falling off of the nuts.

Some locknut products are also available on the market at present, for example, patent application number 202110758386.2, and patent document named locknut discloses a locknut, which comprises a nut body, a limiting pin shaft and a sphere; the nut body is provided with a threaded hole, an axial through hole and a radial through hole which are orthogonally arranged are formed, the axial through hole is used for installing a limiting pin shaft, and the radial through hole is communicated with the threaded hole and is used for installing a sphere; the diameter of the radial through hole is larger than that of the sphere, the diameter of the sphere is larger than the maximum diameter of the limiting pin shaft, and the distance from the inner side of the radial through hole to the bottom of the thread groove in the threaded hole is larger than that of the radial through hole; the diameter of the axial through hole is the same as the maximum diameter of the limiting pin shaft; when the limiting pin shaft is pressed into a first position in the axial through hole, the screw rod and the nut body are contracted; and when the limiting pin shaft is pressed into the second position of the axial through hole, the extrusion of the screw rod is released. This scheme can lock the nut, avoids the nut not hard up, but has a problem, processes out the passageway in the nut inside, and this will reduce the antifatigue strength of nut, reduces the life of nut.

The present invention has been made based on the above-described circumstances.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides the double-nut anti-loosening assembly which can limit the loosening of the auxiliary nut and has a simple structure and easy manufacture.

The invention is realized by the following technical scheme:

the utility model provides a double-nut locking subassembly, includes connecting rod, main nut and vice nut, the connecting rod is from last first double-screw bolt section and the second double-screw bolt section of down being equipped with in proper order, the external diameter of first double-screw bolt section is less than the external diameter of second double-screw bolt section, the screw thread pitch of first double-screw bolt section is less than the screw thread pitch of second double-screw bolt section, be equipped with on the main nut can with second double-screw bolt section threaded connection's first screw, be equipped with on the vice nut can with first double-screw bolt section threaded connection's second screw, be equipped with between main nut and the vice nut and restrict the loose locking structure of vice nut.

The double-nut anti-loosening assembly comprises the first clamping structure arranged on the lower surface of the auxiliary nut, the second clamping structure arranged on the upper surface of the main nut and the third clamping structure arranged on the first clamping structure and the second clamping structure and capable of being clamped with the first clamping structure and the second clamping structure.

The double-nut anti-loosening assembly comprises the first ratchet arranged on the lower surface of the auxiliary nut, the second ratchet arranged on the upper surface of the main nut, the third clamping structure comprises the anti-loosening gasket arranged between the first ratchet and the second ratchet, the anti-loosening gasket is provided with the through hole for the first stud section to be inserted, and the anti-loosening gasket is also provided with a plurality of first bulges which can be abutted with the first ratchet and a plurality of second bulges which can be abutted with the second ratchet.

The double-nut anti-loosening assembly comprises a main nut, wherein the main nut is provided with a plurality of anti-loosening gaskets, the anti-loosening gaskets are provided with a plurality of cutting openings, the cutting openings are used for dividing the anti-loosening gaskets into a plurality of first bending strips and second bending strips, the first bending strips are upwards bent along the screwing direction of the auxiliary nut to form first bulges, and the second bending strips are downwards bent along the unscrewing direction of the main nut to form second bulges.

The double-nut anti-loosening assembly comprises the first protrusions and the second protrusions which are arranged at intervals.

The double-nut anti-loosening assembly comprises the first clamping structure, wherein the first clamping structure comprises the first boss arranged on the lower surface of the auxiliary nut, and a plurality of first clamping blocks are circumferentially arranged on the outer side of each first boss; the second clamping structure comprises a second boss arranged on the upper surface of the main nut, and a plurality of second clamping blocks are circumferentially arranged on the outer side of each second boss; the second clamping structure comprises a clamping sleeve which can be sleeved outside the first boss and the second boss so as to limit the main nut and the auxiliary nut to rotate, and a clamping groove which can be used for the clamping block to insert is formed in the inner side of the clamping sleeve.

According to the double-nut anti-loosening assembly, the thickness of the clamping sleeve is smaller than the height of the second boss, and the clamping spring for limiting the clamping sleeve to slide away from the first boss is further arranged between the lower surface of the clamping sleeve and the upper surface of the main nut.

The double-nut anti-loosening assembly is characterized in that the cutting sleeve is provided with the cutting opening convenient for deformation of the cutting sleeve, the two sides of the cutting opening are provided with the first extending block and the second extending block convenient for breaking the cutting sleeve, and the first extending block and the second extending block are respectively provided with the extending holes for the clamp spring pliers to extend into.

The double-nut anti-loosening assembly is characterized in that the lower ends of the first extending block and the second extending block are provided with buckles capable of being mutually buckled.

The double-nut anti-loosening assembly comprises the first screw hole, the second screw hole and the second screw hole, wherein the threads of the first screw hole are right-handed threads, the threads of the second screw hole are left-handed threads or the threads of the first screw hole are left-handed threads, and the threads of the second screw hole are right-handed threads.

In the double-nut locking assembly, the clamping sleeve is made of spring steel.

Compared with the prior art, the invention has the following advantages:

1. the screw thread pitch of the first screw bolt section is smaller than that of the second screw bolt section, the screw threads of the first screw hole and the screw threads of the second screw hole are screw threads in the same rotation direction or screw threads in different rotation directions, and can be limited by the anti-loosening structure when the auxiliary nut is loosened, so that the situation that the main nut and the auxiliary nut follow rotation is limited, and the anti-loosening effect of the auxiliary nut is better realized.

2. The first bending strip is upwards bent along the screwing direction of the auxiliary nut to form a first bulge, the second bending strip is downwards bent along the unscrewing direction of the main nut to form a second bulge, so that the first bulge can clamp the first ratchet, the second bulge can clamp the second ratchet, the first bulge can not block the first ratchet when the auxiliary nut is screwed, the auxiliary nut can be closer to the anti-loose gasket, and the first ratchet can be smoothly clamped on the first bulge when the auxiliary nut is unscrewed.

3. The clamping grooves of the clamping sleeves for inserting the first clamping blocks and the second clamping blocks are internally provided with clamping grooves for limiting the rotation of the auxiliary nuts, the clamping sleeves are limited by the clamping springs to separate from the auxiliary nuts, and when the auxiliary nuts are required to be disassembled, the clamping springs are only required to be disassembled, the clamping sleeves are withdrawn from the first clamping blocks on the first boss, the auxiliary nuts can be unscrewed smoothly, and the disassembly and the assembly are very convenient and quick.

4. Be equipped with a cutout mouth that makes things convenient for cutting ferrule deformation on the cutting ferrule, when the installation, break off the cutting ferrule to both sides off with the fingers and thumb, just can overlap on first boss and second boss, when need dismantle, break off the cutting ferrule to both sides off with the fingers and thumb, just can dismantle the cutting ferrule, dismouting very convenient and fast.

5. The assembly has simple structure, easy production and manufacture and convenient popularization.

Drawings

The invention is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is an exploded view of embodiment 1 of the present invention;

FIG. 3 is a reference diagram of the usage status of embodiment 1 of the present invention;

FIG. 4 is a schematic view of a cutting mark on a looseness-preventing gasket in example 1 of the present invention;

FIG. 5 is a schematic view of a cutting mark on a looseness-preventing gasket in example 2 of the present invention;

FIG. 6 is a schematic structural view of embodiment 3 of the present invention;

FIG. 7 is an exploded view of embodiment 3 of the present invention;

FIG. 8 is a cross-sectional view of embodiment 3 of the present invention;

FIG. 9 is a schematic view of the structure of the ferrule in embodiment 4 of the present invention;

fig. 10 is a schematic structural view of a clip sleeve according to embodiment 4 of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

the utility model provides a double-nut locking subassembly as shown in fig. 1 through 4, includes connecting rod 1, main nut 2 and vice nut 3, connecting rod 1 is from last first double-screw bolt section 11 and the second double-screw bolt section 12 of being equipped with down in proper order, the external diameter of first double-screw bolt section 11 is less than the external diameter of second double-screw bolt section 12, the screw thread pitch of first double-screw bolt section 11 is less than the screw thread pitch of second double-screw bolt section 12, be equipped with on the main nut 2 can with second double-screw bolt section 12 threaded connection's first screw hole 21, be equipped with on the vice nut 3 can with first double-screw bolt section 11 threaded connection's second screw hole 31, be equipped with between main nut 2 and the vice nut 3 and restrict the loose locking structure of vice nut 3. The inner diameter of the second screw hole 31 is larger than the outer diameter of the first stud segment 11.

The screw pitch of the screw thread of the first stud segment 11 is smaller than that of the screw thread of the second stud segment 12, the screw threads of the first screw hole 21 and the screw threads of the second screw hole 31 are screw threads in the same rotation direction or screw threads in different rotation directions, and can be limited by the anti-loosening structure when the auxiliary nut 3 is loosened, so that the situation that the main nut 2 and the auxiliary nut 3 rotate along is limited, and the anti-loosening effect of the auxiliary nut 3 is better realized.

In this case, the locking structure includes the first block structure of locating vice nut 3 lower surface, locates the second block structure of main nut 2 upper surface and locates first block structure and second block structure can with the third block structure of first block structure and second block structure block.

The first clamping structure comprises a first ratchet 32 arranged on the lower surface of the auxiliary nut 3, the second clamping structure comprises a second ratchet 22 arranged on the upper surface of the main nut 2, the third clamping structure comprises a locking gasket 4 arranged between the first ratchet 32 and the second ratchet 22, a through hole 41 for the first stud segment 11 to be inserted is formed in the locking gasket 4, and a plurality of first bulges 42 which can be abutted to the first ratchet 32 and a plurality of second bulges 43 which can be abutted to the second ratchet 22 are further formed in the locking gasket 4. The direction of the first ratchet 32 is the same as the unscrewing direction of the sub-nut 3, the direction of the second ratchet 22 is the same as the screwing direction of the main nut 2, and in one embodiment, the first ratchet 32 is integrally formed with the sub-nut 3, and the second ratchet 22 is integrally formed with the main nut 2. In one embodiment, the first ratchet 32 is formed by cutting the sub-nut 3 and the second ratchet 22 is formed by cutting the main nut 3.

The anti-loosening gasket 4 is provided with a plurality of cutting openings 46, the cutting openings 46 divide the anti-loosening gasket 4 into a plurality of first bending strips 44 and second bending strips 45, the first bending strips 44 are upwards bent along the screwing direction of the auxiliary nut 3 to form first protrusions 42, the second bending strips 45 are downwards bent along the unscrewing direction of the main nut 2 to form second protrusions 43, so that the first protrusions 42 can clamp the first ratchet teeth 32, the second protrusions 43 can clamp the second ratchet teeth 22, the first protrusions 42 cannot block the first ratchet teeth 32 when the auxiliary nut 3 is screwed, the auxiliary nut 3 can be closer to the anti-loosening gasket 4, and the first ratchet teeth 32 can be smoothly clamped on the first protrusions 42 when the auxiliary nut 3 is unscrewed. The first protrusions 42 and the second protrusions 43 are provided alternately.

As shown in fig. 4, in an embodiment, the locking washer 4 is provided with a first cutting line 47 and a second cutting line 48 which are connected, the first cutting line 47 and the second cutting line 48 are uniformly distributed along the rotation direction of the locking washer 4, the second cutting line 48 is on the left side of the first cutting line 47 or the second cutting line 48 is on the right side of the first cutting line 47, the first cutting line 47 and the second cutting line 48 form an L-shaped cutting line, and the cutting opening 46 is cut along the first cutting line 47 and the second cutting line 48. When the first bending strip 44 and the second bending strip 45 are cut and bent in this way, the screw thread of the first screw hole 21 is a right-handed screw thread, the screw thread of the second screw hole 31 is a left-handed screw thread or the screw thread of the first screw hole 21 is a left-handed screw thread, and the screw thread of the second screw hole 31 is a right-handed screw thread. The screw teeth of the first screw hole 21 and the second screw hole 31 are positive and negative teeth.

In an embodiment, the end of the connecting rod 1 far away from the first stud segment 11 and the second stud segment 12 is provided with a mounting structure for limiting the connecting rod 1 from being separated from the mounting piece 8, the mounting structure may be a protrusion 9 or a thread arranged on the connecting rod 1, and when the mounting structure is a thread, the thread is provided with a nut to be matched with the main nut 2 and the auxiliary nut 3 to mount the connecting rod 1.

Example 2:

as shown in fig. 5, the looseness-preventing gasket 4 of example 2 is different from that of example 1 in that:

the anti-loose spacer 4 is provided with a third cutting line 471, a fourth cutting line 481 and a fifth cutting line 491 which are connected, wherein the third cutting line 471, the fourth cutting line 481 and the fifth cutting line 491 are uniformly distributed along the rotation direction of the anti-loose spacer 4, the fourth cutting line 481 is arranged on the left side of the third cutting line 471 or the fourth cutting line 481 is arranged on the right side of the third cutting line 471, and when the fourth cutting line 481 is arranged on the left side of the third cutting line 471, the fifth cutting line 491 is arranged on the right side of the third cutting line 471; when the fourth cut line 481 is provided on the right side of the third cut line 471, the fifth cut line 491 is provided on the left side of the third cut line 471. The third cut line 471, the fourth cut line 481 and the fifth cut line 491 form a Y-shaped or T-shaped cut line, and the cut 46 is cut along the third cut line 471, the fourth cut line 481 and the fifth cut line 491. When the first bending strip 44 and the second bending strip 45 are cut and bent in this way, the screw teeth of the first screw hole 21 and the screw teeth of the second screw hole 31 are both right-handed screw teeth or the screw teeth of the first screw hole 21 and the screw teeth of the second screw hole 31 are both left-handed screw teeth.

Example 3:

a double nut locking assembly as shown in fig. 6 to 8, embodiment 3 is different from embodiment 1 in that:

the first clamping structure comprises a first boss 33 arranged on the lower surface of the auxiliary nut 3, and a plurality of first clamping blocks 5 are circumferentially arranged on the outer side of the first boss 33; the second clamping structure comprises a second boss 23 arranged on the upper surface of the main nut 2, and a plurality of second clamping blocks 51 are circumferentially arranged on the outer side of the second boss 23; the second clamping structure comprises a clamping sleeve 6 which can be sleeved outside the first boss 33 and the second boss 23 to limit the rotation of the main nut 2 and the auxiliary nut 3, and a clamping groove 61 into which the clamping block 5 can be inserted is formed in the inner side of the clamping sleeve 6. The auxiliary nut 3 is further limited to rotate by inserting the first clamping block 5 and the second clamping block 51 into the clamping groove 61 of the clamping sleeve 6, and when the auxiliary nut 3 is required to be disassembled, the auxiliary nut 3 can be smoothly unscrewed only by withdrawing the clamping sleeve 6 from the first clamping block 5 on the first boss 33, so that the assembly and disassembly are very convenient and quick. In an embodiment, the first latch 5 and the second latch 51 may be straight teeth circumferentially disposed outside the first boss 33 and the second boss 23. The first boss 33 and the second boss 23 have the same structure and size, and the first clamping block 5 on the first boss 33 and the second clamping block 51 on the second boss 23 have the same structure and size. In one embodiment the secondary nut 3, the first boss 33 and the latch are integrally formed. In one embodiment the secondary nut 3, the first boss 33 and the latch 5 are carried out of the same pallet truck.

The thickness of the clamping sleeve 6 is smaller than the height of the second boss 23, and a clamping spring 7 for limiting the clamping sleeve 6 to slide away from the first boss 33 is arranged between the lower surface of the clamping sleeve 6 and the upper surface of the main nut 2. During installation, the clamping sleeve 6 is completely sleeved on the second boss 23, after the auxiliary nut 3 is screwed, the clamping block 5 on the first boss 33 is aligned with the clamping block 5 on the second boss 23, the clamping sleeve 6 is slid upwards, and after the first boss 33 and the second boss 23 are sleeved, the clamping spring 7 is arranged below the clamping sleeve 6, so that the clamping sleeve 6 is limited to slide away from the first boss 33. When the auxiliary nut 3 is required to be disassembled, the auxiliary nut 3 can be unscrewed smoothly only by disassembling the clamp spring 7 and withdrawing the clamp sleeve 6 from the clamping block 5 on the first boss 33, so that the disassembly and assembly are very convenient and quick.

The screw teeth of the first screw hole 21 and the screw teeth of the second screw hole 31 are right-handed screw teeth; the screw teeth of the first screw hole 21 and the screw teeth of the second screw hole 31 are left-handed screw teeth; the screw teeth of the first screw hole 21 are right-handed screw teeth, and the screw teeth of the second screw hole 31 are left-handed screw teeth; the screw teeth of the first screw hole 21 are left-handed screw teeth, and the screw teeth of the second screw hole 31 are right-handed screw teeth. The four modes can meet the installation requirement.

Example 4:

as the ferrule shown in fig. 9 and 10, embodiment 4 is different from embodiment 3 in that:

be equipped with the cutout 62 that makes things convenient for cutting ferrule 6 deformation on cutting ferrule 6, when the installation, break open cutting ferrule 6 to both sides off with the fingers and thumb, just can overlap on first boss 33 and second boss 23, when need dismantle, break open cutting ferrule 6 to both sides off with the fingers and thumb, just can dismantle cutting ferrule 6, dismouting very convenient and fast. In one embodiment, the ferrule 6 is made of spring steel, but may be made of other materials having a certain elasticity and a certain hardness, so that the ferrule is not easy to deform and fall off. The two sides of the cutting opening 62 are provided with a first extension block 63 and a second extension block 631 which are convenient for breaking the cutting sleeve 6, the first extension block 63 and the second extension block 631 are respectively provided with an extending hole 64 into which the clamp spring pliers extend, the inner side of the cutting sleeve 6 is also provided with a groove 66 which enables the cutting sleeve 6 to be easily deformed, and the groove 66 is opposite to the cutting opening 62. The lower ends of the first extension block 63 and the second extension block 631 are provided with buckles 65 which can be mutually buckled, and the buckles 65 are buckled together to further limit the cutting ferrule 6 from falling off from the first boss 33 and the second boss 23.

Claims

1. A double nut anti-loose assembly, characterized in that: including connecting rod (1), main nut (2) and vice nut (3), connecting rod (1) are from last first double-screw bolt section (11) and second double-screw bolt section (12) of down being equipped with in proper order, the external diameter of first double-screw bolt section (11) is less than the external diameter of second double-screw bolt section (12), the screw thread pitch of first double-screw bolt section (11) is less than the screw thread pitch of second double-screw bolt section (12), be equipped with on main nut (2) first screw (21) that can with second double-screw bolt section (12) threaded connection, be equipped with on vice nut (3) second screw (31) that can with first double-screw bolt section (11) threaded connection, be equipped with between main nut (2) and the vice nut (3) and can restrict the loose locking structure of vice nut (3).

2. The double nut locking assembly as claimed in claim 1, wherein: the anti-loosening structure comprises a first clamping structure arranged on the lower surface of the auxiliary nut (3), a second clamping structure arranged on the upper surface of the main nut (2) and a third clamping structure arranged on the first clamping structure and the second clamping structure and capable of being clamped with the first clamping structure and the second clamping structure.

3. A double nut lock assembly as claimed in claim 2, wherein: the first clamping structure comprises a first ratchet (32) arranged on the lower surface of the auxiliary nut (3), the second clamping structure comprises a second ratchet (22) arranged on the upper surface of the main nut (2), the third clamping structure comprises a locking gasket (4) arranged between the first ratchet (32) and the second ratchet (22), a through hole (41) which can be used for inserting a first stud section (11) is formed in the locking gasket (4), and a plurality of first protrusions (42) which can be abutted to the first ratchet (32) and a plurality of second protrusions (43) which can be abutted to the second ratchet (22) are further arranged on the locking gasket (4).

4. A double nut lock assembly as claimed in claim 3, wherein: be equipped with a plurality of cutting ports (46) on locking gasket (4), a plurality of first bending strips (44) and second bending strips (45) have been cut apart on locking gasket (4) to cutting ports (46), first bending strips (44) are upwards buckled along the direction of screwing of vice nut (3) and are formed first arch (42), second bending strips (45) are downwards buckled along the direction of unscrewing of main nut (2) and are formed second arch (43).

5. The double nut lock assembly as claimed in claim 4, wherein: the first protrusions (42) and the second protrusions (43) are arranged alternately.

6. A double nut lock assembly as claimed in claim 2, wherein: the first clamping structure comprises a first boss (33) arranged on the lower surface of the auxiliary nut (3), and a plurality of first clamping blocks (5) are circumferentially arranged on the outer side of each first boss (33); the second clamping structure comprises a second boss (23) arranged on the upper surface of the main nut (2), and a plurality of second clamping blocks (51) are circumferentially arranged on the outer sides of the second bosses (23); the second clamping structure comprises a clamping sleeve (6) which can be sleeved outside the first boss (33) and the second boss (23) to limit the rotation of the main nut (2) and the auxiliary nut (3), and a clamping groove (61) into which the clamping block (5) can be inserted is formed in the inner side of the clamping sleeve (6).

7. The double nut lock assembly as claimed in claim 6, wherein: the thickness of the clamping sleeve (6) is smaller than the height of the second boss (23), and a clamp spring (7) for limiting the clamping sleeve (6) to slide away from the first boss (33) is further arranged between the lower surface of the clamping sleeve (6) and the upper surface of the main nut (2).

8. The double nut lock assembly as claimed in claim 7, wherein: be equipped with one on cutting ferrule (6) and make things convenient for cutting ferrule (6) deformation cut off mouth (62) both sides are equipped with and make things convenient for first extension piece (63) and the second extension piece (631) of breaking off cutting ferrule (6), all be equipped with on first extension piece (63) and the second extension piece (631) and supply jump ring pincers to stretch into hole (64).

9. The double nut lock assembly as claimed in claim 8, wherein: the lower ends of the first extending block (63) and the second extending block (631) are provided with buckles (65) which can be mutually buckled.

10. The double nut lock assembly as claimed in claim 6, wherein: the threads of the first screw hole (21) are right-handed threads, the threads of the second screw hole (31) are left-handed threads or the threads of the first screw hole (21) are left-handed threads, and the threads of the second screw hole (31) are right-handed threads.