CN212131030U - Lock Bolt Assembly - Google Patents

Abstract

The utility model provides a locking bolt assembly, which comprises a bolt, a nut and a locking unit, wherein the bolt comprises a bolt head and a screw rod extending outwards from the bolt head, and the free end of the screw rod deviating from the bolt head is provided with a locking hole; the nut is provided with a threaded hole matched with the screw rod; the locking unit comprises a locking rod, the locking rod can be inserted into the locking hole and can provide anti-falling resistance for the nut so as to prevent the nut from loosening.

Description

Lock Bolt Assembly

technical field

The utility model belongs to the technical field of bolts, in particular to an anti-loosening bolt assembly.

Background technique

A type of fastener consisting of a bolt head and a screw (a cylinder with an external thread), the fastener cooperates with the corresponding nut and is used to fasten one part to another part. Dismantling connectors are widely used in plate fastening, equipment assembly, parts connection and other fields.

When the mechanical equipment is running, mechanical vibration will inevitably occur. Long-term mechanical vibration will cause the bolts to shake and the threads to wear, which in turn makes the tightening effect of the bolts worse and affects the stability of the mechanical equipment.

At present, the nut on the bolt is usually prevented from loosening by regular maintenance by the operator in the form of torque, which increases the labor cost of the mechanical equipment.

Utility model content

At least one object of the present invention is to provide an anti-loosening bolt assembly to prevent the nut from loosening.

For the above-mentioned purpose of the invention, the utility model provides the following technical solutions:

According to one aspect of the present invention, an anti-loosening bolt assembly is provided. The anti-loosening bolt assembly includes a bolt, a nut and an anti-loosening unit. The bolt includes a bolt head and a screw rod extending outward from the bolt head. The free end of the screw rod away from the bolt head is provided with an anti-loosening hole; the nut is provided with a threaded hole matching the screw rod; the anti-loosening unit includes a locking rod, and the anti-loosening rod can be inserted into any into the anti-loosening hole, and can provide resistance against falling off for the nut.

According to an exemplary embodiment of the present invention, the first end of the anti-loosening rod is provided with an external thread, the second end of the anti-loosening rod has a anti-loosening rod head, and the anti-loosening hole is connected to the The external thread of the anti-loosening rod is matched with the internal threaded hole, the anti-loosening unit further comprises a locking cap, the first end of the anti-loosening cap is provided with a nut accommodating hole that can be sleeved on the outer surface of the nut, The second end of the anti-loosening cap is provided with a through hole allowing the anti-loosening rod to pass through. When the anti-loosening rod is set in the anti-loosening hole, the head of the anti-loosening rod presses against the The second end of the lock cap.

Further, the nut is a polygonal nut, and the nut receiving hole is a polygonal hole with the same outer contour as the nut.

According to another exemplary embodiment of the present invention, the cross section of the anti-loosening rod is non-circular, and the anti-loosening unit further comprises a locking member fixed to an end of the nut facing away from the bolt head, The anti-loosening member is provided with a through hole allowing the anti-loosening rod to pass through, and the through hole and the anti-loosening hole are respectively the same as the outer contour of the anti-loosening rod.

Optionally, the cross section of the anti-loosening rod is polygonal, semicircular or elliptical.

Further, the cross section of the anti-loosening rod is a regular hexagon.

According to another exemplary embodiment of the present invention, the first end of the anti-loosening rod is provided with an external thread, the second end of the anti-loosening rod has a anti-loosening rod head, and the anti-loosening hole is the same as the The external thread of the anti-loosening rod is matched with the internal threaded hole, and when the anti-loosening rod is arranged in the anti-loosening hole, the head of the anti-loosening rod is pressed against the nut.

Further, the thread rotation direction of the anti-loosening hole is opposite to the thread rotation direction of the screw rod.

Preferably, a protrusion is provided on the head of the locking rod, and the protrusion can abut on the nut.

The anti-loosening bolt assembly provided by the utility model has the following beneficial effects: the anti-loosening bolt assembly includes a bolt, a nut and an anti-loosening unit, the end of the bolt away from the bolt head is provided with a loosening-proof hole, and a loosening-proof rod can be inserted into the anti-loosening unit. inside the hole, and can provide resistance to the nut against falling off, so as to prevent the nut from loosening.

Description of drawings

The above and/or other objects and advantages of the present invention will become more apparent from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a structural diagram of an anti-loosening bolt assembly used in mechanical equipment according to an exemplary embodiment of the present invention.

FIG. 2 is an exploded view of the lock bolt assembly of FIG. 1 .

FIG. 3 is an A-A cross-sectional view of the anti-loosening bolt assembly in FIG. 2 .

FIG. 4 is a structural diagram of an anti-loosening bolt assembly applied to a mechanical device according to another embodiment of the present invention.

FIG. 5 is an exploded view of the lock bolt assembly of FIG. 4 .

FIG. 6 is a B-B cross-sectional view of the anti-loosening bolt assembly in FIG. 5 .

Description of reference numbers:

1: Bolt; 2: Nut;

3: Anti-loosening unit; 11: Anti-loosening hole;

21: Threaded hole; 31: Anti-loosening rod;

32: Anti-loosening cap; 33: Anti-loosening piece;

311: head of anti-loosening rod; 321: nut receiving hole;

322, 331: through holes; 4: mechanical equipment.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of the present invention are limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

According to one aspect of the present invention, an anti-loosening bolt assembly is provided. The anti-loosening bolt assembly includes a bolt 1, a nut 2 and an anti-loosening unit 3. The bolt 1 includes a bolt head and a screw rod extending outward from the bolt head. The free end of the bolt head is provided with an anti-loosening hole 11 . The anti-loosening unit 3 includes an anti-loosening rod 31 , one end of which can be inserted into the anti-loosening hole 11 and can provide resistance to the nut 2 against falling off. For example, but not limited to, it is defined that the nut 2 fastened on the bolt 1 can be detached from the bolt 1 by rotating in a clockwise direction, and the anti-loosening rod 31 will exert a counterclockwise resistance on the nut 2, thereby preventing the nut 2 from loosening , further reducing labor costs.

FIG. 1 is a structural diagram of an anti-loosening bolt assembly provided in an exemplary embodiment of the present invention applied to a mechanical device. FIG. 2 is an exploded view of the lock bolt assembly of FIG. 1 . FIG. 3 is an A-A cross-sectional view of the anti-loosening bolt assembly in FIG. 2 .

As an example, referring to FIG. 1 to FIG. 3 , in this embodiment, the anti-loosening unit 3 includes a anti-loosening rod 31 and an anti-loosening cap 32 . The first end of the locking rod 31 may be provided with an external thread, and the second end of the locking rod 31 has a locking rod head 311 , and the cross-sectional area of the locking rod head 311 may be larger than that of the locking rod 31 . area. The anti-loosening hole 11 is an internal threaded hole matched with the external thread of the anti-loosening rod 31 , so that the first end of the anti-loosening rod 31 can be inserted into the anti-loosening hole 11 .

The first end of the locking cap 32 may be provided with a nut accommodating hole 321 that can be sleeved on the outer surface of the nut 2 . When the nut accommodating hole 321 is sleeved on the nut 2 , the locking cap 32 and the nut 2 do not rotate relative to each other. .

Further, the second end of the locking cap 32 may be provided with a through hole 322 allowing the locking rod 31 to pass through, the through hole 322 can communicate with the nut receiving hole 321 , and the locking rod 31 may pass through the through hole 322 in sequence. and the nut accommodating hole 321 and then inserted into the anti-loosening hole 11 . When the anti-loosening rod 31 is disposed in the anti-loosening hole 11 , the head 311 of the anti-loosening rod can press against the second end of the anti-loosening cap 32 . In this embodiment, since the locking cap 32 and the nut 2 do not rotate relative to each other, when the locking rod head 311 is pressed against the second end of the locking cap 32 , the locking rod head 311 can prevent loosening The resistance of the cap 32 to rotate, thereby providing resistance to prevent the nut 2 from loosening, thereby achieving the purpose of preventing the nut 2 from loosening.

Further, the through hole 322 of the anti-loosening cap 32 may be a smooth hole or a threaded hole.

In this embodiment, the cross section of the through hole 322 of the anti-loosening cap 32 may be circular, rectangular, oval, or the like. The cross-sectional area of the through hole 322 of the anti-loosening cap 32 can be S2, the cross-sectional area of the first anti-loosening hole 11 can be S3, and the cross-sectional area of the anti-loosening rod head 311 can be S1, satisfying S3≤S2<S1 .

Further, the thread rotation direction of the anti-loosening hole 11 can be opposite to that of the screw, so that when the nut 2 tends to loosen, under the action of the frictional force between the locking rod head 311 and the nut 2 , the anti-loosening rod 31 will have the same rotation tendency with the nut 2 , so that the threaded connection between the anti-loosening rod 31 and the bolt 1 is tightened to prevent the nut 2 from loosening.

Specifically, referring to FIG. 3 , the longitudinal section of the locking rod 31 may be a T-shaped structure, and the locking rod head 311 may be arranged perpendicular to the central axis of the rod portion of the locking rod 31 , but not limited thereto. The external thread of the first end of the locking rod 31 can extend continuously to the second end, and the length of the external thread can be set according to actual needs. Further, the nut 2 is a polygonal nut, and the nut receiving hole 321 is a polygonal hole with the same outer contour as the nut 2 .

Specifically, the nut 2 can be a hexagonal nut, and the cross-section of the nut receiving hole 321 can be a regular hexagon, so that the anti-loosening cap 32 can be sleeved on the outer circumference of the nut 2 and has no relative rotation with the nut 2, so that the anti-loosening cap 32 can be sleeved on the outer circumference of the nut 2 without relative rotation. The loosening rod head 311 presses against the second end of the locking cap 32 to indirectly prevent the nut 2 from loosening from the bolt 1 by preventing the locking cap 32 from rotating.

In this embodiment, the cross section of the locking rod head 311 in the direction perpendicular to the central axis of the locking rod 31 can be set to be non-circular, so as to facilitate its screwing. Under the circumstance that the cross section in the direction of the central axis of the anti-loosening rod 31 is circular, the outer end surface of the anti-loosening rod head 311 can also be provided with a "one"-shaped groove or a "cross"-shaped groove which is convenient for using a screwing tool. way to achieve screwing.

In this embodiment, the nut 2 can be set on the outer circumference of the screw rod and rotated to a predetermined position, and then the nut accommodating hole 321 of the anti-loosening cap 32 can be set on the outer circumference of the nut 2, and the anti-loosening rod 31 can be inserted into the anti-loosening Screw the anti-loosening rod 11 into the hole 11 until the head 311 of the anti-loosening rod tightly presses against the second end of the anti-loosening cap 32 .

FIG. 4 is a structural diagram of an anti-loosening bolt assembly applied to a mechanical device according to another embodiment of the present invention. FIG. 5 is an exploded view of the lock bolt assembly of FIG. 4 . FIG. 6 is a B-B cross-sectional view of the anti-loosening bolt assembly in FIG. 5 .

In another exemplary embodiment of the present invention, the anti-loosening unit 3 may include a locking rod 31 and a locking member 33 fixedly disposed at one end of the nut 2 away from the bolt 1 . The cross section can be non-circular, the anti-loosening member 33 is provided with a through hole 331, and the through hole 331 and the anti-loosening hole 11 of the anti-loosening member 33 can be matched with the anti-loosening rod 31 respectively. The cross section may be non-circular to match the lock bar 31 . In the case where the locking rod 31 penetrates into the locking hole 11 and the through hole 331 at the same time, since there is no relative rotation of the three, the nut 2 can be prevented from loosening.

The cross-section of the anti-loosening rod 31 can be oval, semi-circular, polygonal (for example, rectangular, triangular, etc.), preferably, the cross-section of the anti-loosening rod 31 is a regular polygon, so that the nut 2 has a loosening tendency. down, can be evenly stressed. In this embodiment, the cross section of the anti-loosening rod 31 is a regular hexagon.

The anti-loosening member 33 and the nut 2 may be integrally formed, or after the anti-loosening member 33 and the nut 2 are formed separately, the two may be fixed together by a process such as welding.

In this embodiment, the contour of the outer peripheral surface of the anti-loosening member 33 is the same as the contour of the outer peripheral surface of the nut 2, but it is not limited thereto.

In this embodiment, the nut 2 can be sleeved on the outer periphery of the screw rod and rotated to a predetermined position, and the alignment of the through hole 331 and the anti-loosening hole 11 can be adjusted, so that the anti-loosening rod 31 can be inserted into the through hole 331 and the anti-loosening hole at the same time. into the hole 11 and insert the anti-loosening rod 31.

In this embodiment, since the cross section of the locking rod 31 , the cross section of the through hole 331 and the cross section of the locking hole 11 are non-circular matching with each other, the locking rod 31 is inserted into the through hole 331 and the In the case of the locking hole 11 , the locking rod 31 , the nut 2 and the bolt 2 cannot rotate relative to each other, so the loosening of the nut 2 can be prevented. In this embodiment, since the anti-loosening member 33 is directly connected with the nut 2 , when the nut 2 tends to loosen, the anti-loosening rod 31 can directly provide resistance to prevent the nut 2 from loosening.

In addition to the above two embodiments, the present invention also provides an anti-loosening bolt assembly. Compared with the first embodiment, the present invention can omit the anti-loosening cap 32 and directly press the anti-loosening rod head 311 against the nut. 2 (not shown).

Specifically, the side of the locking rod head 311 connected to the rod portion has a protrusion protruding outward, and the protrusion is annularly arranged around the rod portion. Further, in this embodiment, a plurality of protrusions spaced apart from each other may be provided on the outer ring of the rod portion, and of course, there may also be connected annular structures on the outer ring of the rod portion. When the anti-loosening rod 31 is arranged in the anti-loosening hole 11 , the protrusion can be pressed against the nut 2 , that is to say, the anti-loosening rod 31 in this embodiment is in direct contact with the nut 2 , so that the Nut 2 provides resistance against loosening. In this embodiment, the length of the protrusion along the axial direction of the rod portion can be selected according to actual needs.

The described features, structures, or characteristics of this disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present invention. However, one skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

Claims (9)

1. A lockbolt assembly, comprising:

a bolt (1) comprising a bolt head and a screw extending outwardly from the bolt head, a free end of the screw facing away from the bolt head being provided with an anti-loosening hole (11);

the nut (2), the said nut (2) has threaded hole (21) matching with said threaded spindle;

locking unit (3), locking unit (3) include locking pole (31), locking pole (31) can insert in preventing pine hole (11), and can for nut (2) provide anti-drop's resistance.

2. A lock bolt assembly as defined in claim 1, wherein the first end of the lock rod (31) is provided with an external thread, the second end of the lock rod (31) has a lock rod head (311), the lock hole (11) is an internal thread hole matching the external thread of the lock rod (31), the lock unit (3) further comprises a lock cap (32), the first end of the lock cap (32) is provided with a nut receiving hole (321) capable of being sleeved on the outer surface of the nut (2), the second end of the lock cap (32) is provided with a first through hole (322) allowing the lock rod (31) to pass therethrough, and when the lock rod (31) is disposed in the lock hole (11), the lock rod head (311) is pressed against the second end of the lock cap (32).

3. A lockbolt assembly as claimed in claim 2, wherein the nut (2) is a polygonal nut, and the nut receiving hole (321) is a polygonal hole having the same outer profile as the nut (2).

4. Anti-loose bolt assembly according to claim 1, characterized in that the cross-section of the anti-loose rod (31) is non-circular, the anti-loose unit (3) further comprises an anti-loose piece (33) fixed to the end of the nut (2) facing away from the bolt head, the anti-loose piece (33) is provided with a second through hole (331) allowing the anti-loose rod (31) to pass through, and the second through hole (331) and the anti-loose hole (11) are respectively identical to the outer contour of the anti-loose rod (31).

5. Anti-loose bolt assembly according to claim 4, characterized in that the cross-section of the anti-loose rod (31) is polygonal, semicircular or elliptical.

6. Anti-loose bolt assembly according to claim 5, characterized in that the cross section of the anti-loose rod (31) is a regular hexagon.

7. Anti-loose bolt assembly according to claim 1, characterized in that the first end of the anti-loose rod (31) is provided with an external thread, the second end of the anti-loose rod (31) is provided with an anti-loose rod head (311), the anti-loose hole (11) is an internal thread hole matching with the external thread of the anti-loose rod (31), and when the anti-loose rod (31) is arranged in the anti-loose hole (11), the anti-loose rod head (311) is pressed against the nut (2).

8. Anti-loose bolt assembly according to claim 2, characterized in that the thread direction of the anti-loose hole (11) is opposite to the thread direction of the screw.

9. Anti-loose bolt assembly according to claim 8, characterized in that the anti-loose shank head (311) is provided with a projection which can abut on the nut (2).

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