CN111396436A

CN111396436A - Dense-tooth check bolt and nut assembly

Info

Publication number: CN111396436A
Application number: CN201910301531.7A
Authority: CN
Inventors: 马占军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-05
Filing date: 2019-04-16
Publication date: 2020-07-10

Abstract

The invention relates to a dense-tooth check bolt nut assembly, which relates to the technical field of mechanical engineering and comprises a slotted screw body (1), a nut (2) and a positioning ring (3), wherein one or more key slots (11) with certain length are machined at the thread end of the slotted screw body (1), an internally-sealed gear ring (21) and a plurality of clamping plates (22) are welded on the nut (2) to form a whole, a positioning key (31) is machined on the inner side of the positioning ring (3), an externally-sealed gear ring (32) is machined on the outer side of the positioning ring (3), the nut (2) is screwed into the screw body (1) and a workpiece is fastened, a proper key slot (11) is selected, the positioning key (31) of the positioning ring (3) is sleeved into the key slot (11), then the externally-sealed gear ring (32) on the positioning ring (3) is meshed with the internally-sealed gear ring (21) on the nut (2), and after the positioning ring (3) is assembled, the clamping plates (22) are twisted by a certain angle to clamp the positioning ring (3).

Description

Dense-tooth check bolt and nut assembly

Technical Field

The invention relates to the technical field of mechanical engineering.

Background

Threaded fasteners are widely used for fastening connections between various mechanical structures. In practical application, compared with a method for increasing friction force to prevent looseness, the mechanical anti-loosening structure is more reliable in anti-loosening performance, but the existing known mechanical anti-loosening structure is large in size, complex in structure, difficult to overhaul and eliminate hidden dangers, and complex in assembly and disassembly, so that the mechanical anti-loosening structure is not widely applied in practical production, and anti-loosening nuts and gaskets are mainly prevented in important engineering projects such as China high-speed rails and the like by adopting a method for increasing friction force abroad, so that a mechanical anti-loosening structure fastener which is reliable in performance, simple and practical in structure is needed to be invented in engineering construction.

Disclosure of Invention

The invention aims to solve the technical problem of providing a reliable fastening piece which can meet the reliable anti-loosening requirement, has a small and exquisite and simple structure, can be obviously seen from the appearance if damaged in daily work, does not need to increase the pretightening force intentionally for preventing loosening, is convenient to overhaul and does not damage the surface of a workpiece.

In order to achieve the purpose, the technical scheme includes that the dense-tooth anti-loosening bolt and nut assembly comprises a slotted screw body (1), a nut (2) and a positioning ring (3), one or more key grooves (11) with certain length are machined at the threaded end of the slotted screw body (1), an inner dense gear ring (21) and a plurality of clamping plates (22) are welded on the nut (2) to form a whole, a positioning key (31) is machined on the inner side of the positioning ring (3), an outer dense gear ring (32) is machined on the outer side of the positioning ring (3), the number of teeth of the outer dense gear ring is the same as that of the inner dense gear ring (21), the nut (2) is screwed into the screw body (1) and a workpiece is fastened, a proper key groove (11) is selected, the positioning key (31) of the positioning ring (3) is sleeved into the key groove (11), then the outer dense gear ring (32) on the positioning ring (3) is meshed with the inner dense gear ring (21) on the nut (2), the requirement that the value of a circular center angle corresponding to a manufacturing gap between the positioning key (31) and the key groove (11) is not smaller than that of a corresponding to the circular center angle of a corresponding to which the key groove (2) is matched with the corresponding to the positioning ring (3) is met, the nut (11) is met, and the nut (3) can be fastened, and the nut (3) is fixed to the nut (3), and the nut (3) at the proper angle, and the nut (3) can be fastened to.

The technical points of the invention are that: the wide and large fixing mode of the positioning key (31) and the key groove (11) is converted into the fine and dense gear ring meshing of the nut end through the positioning ring (3), the action of dense teeth bears the external force transmitted by the key through a plurality of or whole circle of teeth, so that the size of the teeth can be reduced by 1 to 1.5 millimeters, and further, the size of the teeth is reduced to millimeter level, so that the mutual position relation between the nut and the bolt can be locked when the nut rotates to any position to achieve the purpose of preventing looseness by adjusting the meshing position of the positioning ring (3). The mechanical anti-loosening invention known at present has no method for thinning the meshing orientation by receiving external force in a targeted and dispersed manner. Therefore, the general structure is complex, the volume is large, and the practicability is lost. And a second point: the anti-loose structure part of most known mechanical anti-loose inventions is positioned between a nut and a workpiece, and the anti-loose structure part cannot be observed, so that the anti-loose performance is unreliable, the structure is complicated, and dangers cannot be found from the outside when the anti-loose is invalid, but the anti-loose structure part is not positioned between the nut and the workpiece and positioned on the upper surface of the nut, so that the structure is greatly simplified, and another great advantage is brought, dense teeth and keys of the anti-loose structure exist on the surface simply, and the anti-loose part can be seen by naked eyes whether being abnormal or not during daily work and maintenance, thereby being beneficial to finding dangers at any time, saving a large amount of maintenance time and workload, and the third point is that: the clearance between the key groove (11) and the positioning key (31) is reduced by utilizing the position difference between the dense teeth and the key groove, and the number of the dense teeth and the key groove has no special requirement. To the operating condition that locking requirement is high, can process more than one keyway (11) at the screw thread end of slotted screw body (1), from clockwise or anticlockwise direction, the degree of the central angle that arbitrary two adjacent keyways correspond should be: the central angle degree corresponding to N dense teeth plus the central angle degree corresponding to one dense tooth divided by the number of key slots can be obtained, and the value of N is only required to ensure that the key slots are not overlapped, so that the position difference between the dense teeth and the key slots is utilized, and the manufacturing clearance between the positioning key (31) and the key slots (11) is further reduced. A fourth point: the cardboard (22) twists reverse the mode of blocking holding ring (3), and is succinct open, has guaranteed that locking position can easily be observed by the naked eye, and very easy discovery is inefficacious, simultaneously, because twist reverse the plastic permanent deformation that makes the cardboard produce, can reliably block the holding ring, makes locking effect reliable, the accident of holding ring roll-off can not appear.

The invention has the beneficial effects that: 1. the locking reliability is well guaranteed by the aid of the key, the groove, the dense tooth meshing fixing mode and the twisting clamping plate. 2. The structure is extremely small and exquisite simple, and radial dimension and standard nut size are the same, need not change present various trade bolt interval standards, let extensive practical application become possible 3. the dense tooth of anti loosening structure and the succinct existence in surface of key, during daily work and maintenance, whether the naked eye can see locking part unusual, is favorable to discovering danger at any time, and saves a large amount of maintenance time and work load. 4. The nut is not applied with acting force in the assembling and disassembling process, the pretightening force is not required to be increased intentionally for looseness prevention, no additional force is added into the pretightening force of the nut on the workpiece, and the pressure fluctuation of the nut on the workpiece is not caused. 5. The assembly and disassembly can not damage the surface of the workpiece, and the assembly and disassembly tool is more suitable for the working requirement of frequent disassembly.

Drawings

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

FIG. 1 is a schematic structural view of a dense-teeth anti-loose bolt and nut assembly according to the present invention.

Fig. 2 is an effect view of the sequential assembly of the parts.

FIG. 3 is a schematic view of the axial engagement of a non-full ring retaining ring and a ring gear.

In the figure, 1 is a slotted screw rod body, 2 is a nut, and 3 is a positioning ring.

The specific implementation mode is as follows:

as shown in fig. 1, a dense tooth check bolt and nut assembly is provided, which comprises a slotted bolt body (1), a nut (2) and a positioning ring (3), wherein one or more key grooves (11) with certain length are machined at the threaded end of the slotted bolt body (1), an inner dense gear ring (21) and a plurality of clamping plates (22) are welded on the nut (2) to form a whole, a positioning key (31) is machined on the inner side of the positioning ring (3), an outer dense gear ring (32) is machined on the outer side, the number of teeth of the inner dense gear ring is the same as that of the inner dense gear ring (21), after the nut (2) is screwed into the bolt body (1) and a workpiece is fastened, a proper key groove (11) is selected, the positioning key (31) of the positioning ring (3) is sleeved into the key groove (11), then the outer dense gear ring (32) on the positioning ring (3) is meshed with the inner dense gear ring (21) on the nut (2), as long as the requirement that the manufacturing clearance between the positioning key (31) and the key groove (11) is not less than the number of a dense tooth corresponding to the key groove corresponding to the dense tooth, the spline, the nut (3) can be assembled, the nut (3) can be assembled, the nut (21) can be assembled, the nut (3) can be assembled into a dense tooth, the nut (3), the nut can be assembled into a dense tooth, the nut can be assembled into a dense tooth, the nut (21) and the nut can be assembled into a dense tooth, the nut can be assembled into the nut, the nut can be assembled into the nut, the nut can be.

The scope of the invention should not be considered limited to the particular forms set forth, but is intended to include all equivalent technical means, modifications of tooth shape and structural principles which may occur to those skilled in the art upon consideration of the present disclosure.

Claims

1. The utility model provides a dense tooth check bolt nut subassembly, slotted screw body (1) and nut (2) are through threaded connection, characterized by provides a dense tooth check bolt nut subassembly, including slotted screw body (1), nut (2), holding ring (3), the screw thread end processing one or several keyway (11) of certain length of slotted screw body (1), it becomes integrative to weld an interior dense ring gear (21) and a plurality of cardboard (22) on nut (2), holding ring (3) inboard processing has navigation key (31), outside processing has outer dense ring gear (32), its number of teeth is the same with the number of teeth of interior dense ring gear (21), nut (2) screw in the body (1) and fastening work piece after, select suitable keyway (11), embolia this keyway (11) into the navigation key (31) of holding ring (3), then with the interior dense ring gear (21) on the outer dense ring gear (32) meshing nut (2) on holding ring (3), no matter satisfy that the manufacturing clearance between navigation key (31) and keyway (11) corresponds the value of a dense tooth and do not close the inside key (11) of the whole navigation key (3) and get the corresponding number of the inside the key (11) of the corresponding key (3), thereby no matter the nut can not get the corresponding key (11) of the fixed angle of the corresponding key (3) of the corresponding key of the outside the fixed plate (11) of the corresponding angle of the outside of the corresponding key (3) of the fixed plate (3) of the corresponding angle of the fixed plate (3) of the fixed angle of the corresponding key (3) of the fixed plate (.

2. The dense-tooth anti-loose bolt and nut assembly as claimed in claim 1, wherein the positioning key (31) and the key groove (11) are fixed in a wide and large mode through the positioning ring (3) and are meshed with the fine and dense gear ring at the end of the nut, the dense teeth are used for bearing external force transmitted by the key through a plurality of or a whole circle of teeth, so that the size of the teeth can be made very small by 1 to 1.5 mm, and further, the size of the teeth is reduced to a millimeter level, so that the nut can be locked in the mutual position relation between the nut and the bolt when the nut rotates to any position by adjusting the meshing position of the positioning ring (3) to achieve the anti-loose purpose.

3. A dense-teeth anti-loose bolt and nut assembly as claimed in claim 1, wherein the threaded end of the slotted bolt body (1) is provided with one or two keyways (11) with a certain length, and the central angle corresponding to any two adjacent keyways is determined by the following degrees from clockwise or counterclockwise direction: the central angle degree corresponding to N dense teeth plus the central angle degree corresponding to one dense tooth divided by the number of key slots can be obtained, and the value of N is only required to ensure that the key slots are not overlapped, so that the position difference between the dense teeth and the key slots is utilized, and the manufacturing clearance between the positioning key (31) and the key slots (11) is further reduced.

4. The dense-tooth anti-loose bolt and nut assembly as claimed in claim 1, wherein the clamping plate (22) is plastically deformed to twist the clamping positioning ring (3) in a manner to reliably clamp the positioning ring, and is simple and open, so that the anti-loose part can be easily observed by naked eyes, and various faults can be easily found.

5. The tight-teeth check bolt nut assembly of claim 1, wherein the positioning ring can be non-integral and the gear ring can be engaged in a circumferential or axial manner according to actual requirements.