CN214888280U

CN214888280U - Locking nut

Info

Publication number: CN214888280U
Application number: CN202120612912.XU
Authority: CN
Inventors: 於一凡; 朱正轩
Original assignee: Misumi China Precision Machinery Trading Co ltd
Current assignee: Silk Road Coffee Precision Machinery Nantong Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-11-26
Anticipated expiration: 2031-03-25

Abstract

The utility model provides a locking nut. The locknut is formed into a ring shape with a groove part on the peripheral wall, the groove part is formed along the axial direction of the locknut, the locknut further comprises at least two threaded holes penetrating through the peripheral wall and the inner peripheral wall of the locknut, a shaft penetrates through a through hole of the locknut to be matched and screwed with an inner thread formed in the through hole, when the locknut is screwed, a screwing workpiece is required to apply force to the peripheral wall of the nut, at the moment, the groove part on the peripheral wall of the locknut can be matched with the fastening workpiece to apply force, so that the locking force between the locknut and the shaft can be enhanced, the locknut can be further prevented from loosening by loosening the clamping of the loosening gasket after being screwed, threaded holes which are penetrated through the peripheral wall and the inner peripheral wall of the locknut and can be further increased, so that the screw penetrates through the threaded holes to be abutted to the shaft, when the locknut generates loosening force in dynamic load, opposite centripetal force is generated between the screw and the shaft, so that the lock nut is locked.

Description

Locking nut

Technical Field

The utility model relates to a mechanical parts, more specifically say, the utility model relates to a lock nut.

Background

In the field of current machine manufacturing, nut fixing is widely applied, but with the development of machine manufacturing industry, the energy of various mechanical equipment is higher and higher, the movement speed frequency and the like are also continuously improved, and common nut fixing is more and more difficult to maintain the reliable fixing of the mechanical equipment in a dynamic load, so that a locking nut formed after the nut is further improved has stronger locking force, and can be used for more reliable fixing in the dynamic load.

In the prior art, commonly used lock nuts are divided into two categories: one type is a lock nut with a groove part arranged on the peripheral wall of the nut, wherein the groove part is not only an acting point for screwing a workpiece, but also a clamping position of a bayonet of a check washer; the other type is that a through threaded hole is drilled from the outer peripheral wall to the inner peripheral wall of the nut and is used for screwing in a small-diameter countersunk head screw, so that a force in a centripetal direction can be applied to the thread to prevent the locking nut from loosening.

For the first type of lock nut, when the nut is installed on the shaft, one end of the shaft needs to penetrate through a central threaded hole of the nut, the shaft and the nut cannot be closely matched, and therefore a gap still exists after the nut is screwed down, so that the locking force is insufficient; in the second type of lock nut, since the contact surface between the screw and the shaft is small, and the nut and the shaft are kept fixed through the small contact surface, the screw needs to generate a large pressure to the shaft through the contact surface, and the excessive pressure easily damages the thread on the shaft, further causing deformation of the shaft and center of gravity shift.

SUMMERY OF THE UTILITY MODEL

In view of the above problems of the prior art, the present invention provides a lock nut, which utilizes the combination improvement of the structure to alleviate the excessive pressure on the contact surface of the screw and the shaft by providing a groove portion on the outer peripheral wall of the lock nut and combining the screw hole running through the outer peripheral wall to the inner peripheral wall of the lock nut, and generates a larger locking force.

The lock nut is formed in a ring shape having an outer peripheral wall with a groove portion formed in an axial direction of the lock nut, and includes at least two screw holes penetrating the outer peripheral wall and the inner peripheral wall of the lock nut.

According to the technical scheme, the groove part on the outer peripheral wall of the locking nut can be matched with a screwing workpiece and a locking gasket for use, the locking force between the locking nut and the shaft is enhanced, and the threaded hole which penetrates through the inner and outer walls of the locking nut and can be penetrated by a screw is further increased, so that the locking nut can be abutted against the shaft through the screw, when the locking nut generates an outward rotating force in a dynamic load, an opposite centripetal force is generated between the screw and the shaft, the nut is locked, meanwhile, the locking nut can be screwed up due to the groove part, so that the contact surface with the shaft is larger, the movement of the screw and the shaft is limited by not only depending on the abutment of the screw and the shaft, and the pressure between the screw and the shaft is alleviated. In addition, the more than two threaded holes can avoid unidirectional abutting pressure to shift the center of gravity of the shaft, and the stability of fixation between the locking nut and the shaft is further improved.

The utility model discloses an among the preferred technical scheme, the slot part has a plurality ofly and evenly arranges on lock nut's periphery wall. According to the technical scheme, the plurality of groove parts are uniformly distributed on the peripheral wall, so that the peripheral stress of the locking nut can be uniform when the locking nut is screwed down through screwing a workpiece.

The utility model discloses an among the preferred technical scheme, the screw hole is formed between two adjacent slot portions, and is the same with the length homogeneous phase of the line at two slot portion centers on the screw hole axis.

According to this technical scheme, the slot part is formed on lock nut's periphery wall uniformly, and the screwed hole forms between two slot parts, thereby screw thread and slot part staggered evenly distributed are on lock nut, avoid producing the thin wall and leading to in this thin wall department stress concentration because the opening of slot part and screw hole is close too, and the screw hole is evenly arranged and can be guaranteed the screw and pass the even butt of surface of screw hole back and axle, thereby further make the pressure that the axle received balanced, avoid the barycenter skew of axle, promote lock nut's bulk strength.

In the preferred technical scheme of the utility model, the ratio of the diameter of screw hole and lock nut's axial thickness is not more than 2/3. According to the technical scheme, the diameter of the threaded hole is limited, the phenomenon that the distance between the end face of the locking nut and the wall face of the threaded hole is too short due to the fact that the threaded hole is too large is avoided, and the overall strength of the locking nut is influenced due to the fact that the wall face of the locking nut is too thin.

In a preferred embodiment of the present invention, an angle between an axis of the threaded hole and an axis of the lock nut is 60 ° or 90 °.

According to the technical scheme, most of the vibration is up-and-down vibration along the axial direction of the lock nut, so that when the threaded hole is properly inclined, the anti-vibration effect of the lock nut is optimal, and the inclined pressure can better limit the mutual movement between the lock nut and the shaft along the axial direction.

The utility model discloses an among the preferred technical scheme, the slot part is 3 with the screw hole. According to the technical scheme, the position of the shaft inside the locking nut can be fixed through the force in the three directions, the situation that the screw cannot be abutted against the shaft due to the fact that the shaft moves in a moving process is avoided, and the locking force and the locking reliability are improved.

The utility model discloses an among the preferred technical scheme, the slot part is 4 with the screw hole. According to the technical scheme, furthermore, the position of the inner shaft of the lock nut can be more reliably fixed through the force in the four directions, and the four screw fixation can enable the shaft to be subjected to the pressure with two pairs of opposite directions and consistent sizes, so that the phenomenon that the shaft is subjected to the butting in the asymmetric direction to cause the gravity center offset of the shaft is avoided, and in addition, the butting in the four directions can ensure that after the screw in one direction is loosened, other three screws can still be kept in butting with the shaft and provide the pressure to fix the position of the shaft.

In a preferred embodiment of the present invention, the lock nut further includes a boss portion formed to extend in the axial direction from the inner peripheral wall. According to the technical scheme, when the locking nut is used as a locking component of the bearing, the boss part can be tightly attached to the inner ring of the bearing, and the bearing positioning function is achieved. This allows both the bearing to be tightened and also acts as a bearing inner race clamping ring, particularly in the case of a space between the shaft and the bearing.

Drawings

Fig. 1 is a schematic structural diagram of a lock nut provided by the present invention;

fig. 2 is a schematic structural view of another lock nut provided by the present invention;

fig. 3 is a side view of a locking nut provided by the present invention;

fig. 4 is a cross-sectional view of a lock nut provided by the present invention;

fig. 5 is a cross-sectional view of the lock nut with different inclination angles of the threaded holes provided by the present invention;

fig. 6 is a schematic structural view of a further locking nut provided by the present invention;

fig. 7 is a schematic structural diagram of a further lock nut provided by the present invention.

Reference numerals:

100, a through hole;

101, an outer peripheral wall;

11, a groove part;

102, an inner circumferential wall;

21, a threaded hole;

22, a boss portion.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

It should be noted that in the description of the preferred embodiments of the present invention, the terms "inner", "outer", "axial", and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or component must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, fig. 1 is a schematic structural diagram of a lock nut provided by the present invention. The lock nut is formed in a ring shape with an outer peripheral wall 101 having a groove portion 11, the groove portion 11 being formed in an axial direction of the lock nut, and the lock nut further includes at least two screw holes 21 penetrating the outer peripheral wall 101 and the inner peripheral wall 102 of the lock nut.

It should be noted that, the structure and the number of the groove portions 11 and the threaded holes 21 are illustrated in fig. 1, but the present invention is not limited to this, and other groove portions 11 formed along the axial direction of the lock nut and more than two threaded holes 21 penetrating the outer circumferential wall 101 and the inner circumferential wall 102 of the lock nut are arranged on the lock nut in any number, which does not exceed the protection scope of the present invention.

In the present embodiment, first, the shaft is screwed through the through hole 100 of the locknut in cooperation with the internal thread (not shown) formed in the through hole 100, and when the locknut is screwed, the nut outer peripheral wall 101 needs to be urged by a screwing workpiece, and at this time, the groove portion 11 in the locknut outer peripheral wall 101 can be engaged with the screwing workpiece to urge the force, so that the locking force between the locknut and the shaft can be enhanced, and the locknut can be further prevented from being loosened by the engagement of the lock washer after the screwing.

Next, a screw hole 21 through which a screw can pass is further added to penetrate the outer peripheral wall 101 and the inner peripheral wall 102 of the lock nut, so that the screw passes through the screw hole 21 and abuts against the shaft, and when the lock nut generates a loosening force in a dynamic load, an opposite centripetal force is generated between the screw and the shaft, so that the lock nut is locked. Further, the groove 11 allows the locknut to be easily tightened by a tightening workpiece, i.e., the contact surface between the inner peripheral wall 102 of the locknut and the shaft is made closer, and it is not necessary to limit the movement of the screw and the shaft by abutting the screw and the shaft separately, thereby relieving the pressure between the screw and the shaft.

Finally, the two or more screw holes 21 can prevent the center of gravity of the shaft from shifting due to the one-way abutment pressure, and the stability of the fixation between the lock nut and the shaft is further improved.

Wherein, preferably, fig. 2 is a schematic structural diagram of another lock nut provided by the present invention. As shown in fig. 2, on the outer peripheral wall 101 of the lock nut, the groove portions 11 are plural and arranged uniformly on the outer peripheral wall 101 of the lock nut.

In the present embodiment, the plurality of groove portions 11 are uniformly arranged on the outer peripheral wall 101, so that when the lock nut is tightened by tightening a workpiece, the outer peripheral wall 101 of the lock nut can be uniformly stressed, stress concentration caused by uneven stress is avoided, and the service life of the lock nut is shortened.

Preferably, the threaded hole 21 is formed between two adjacent groove portions 11, and the length of a connecting line between the axis of the threaded hole 21 and the centers of the two groove portions 11 is the same.

In this embodiment, slot part 11 is formed on lock nut's periphery wall 101 evenly, and screw hole 21 is formed between two slot parts 11, thereby screw thread and slot part 11 crisscross evenly distributed are on lock nut, avoid producing the thin wall and leading to stress concentration in this thin wall department because slot part 11 is close to too with screw hole 21's opening, and screw hole 21 evenly arranges and can guarantee the even butt of screw and the surface of axle behind the screw hole 21 that passes, thereby further make the pressure that the axle received balanced, avoid the barycenter skew of axle, promote lock nut's bulk strength.

Wherein, preferably, fig. 3 is a side view of the lock nut provided by the present invention. As shown in fig. 3, the ratio of the diameter D1 of the threaded bore 21 of the lock nut to the axial thickness D2 of the lock nut is no greater than 2/3. In the present embodiment, by limiting the diameter of the threaded hole 21, it is avoided that the distance between the end surface of the lock nut and the wall surface of the threaded hole 21 (i.e., D2-D1) is too short due to the excessively large threaded hole 21, and the wall surface of the lock nut is too thin, which affects the overall strength of the lock nut.

Wherein, preferably, fig. 4 is a cross-sectional view of the lock nut provided by the present invention. As shown in fig. 4, the angle between the axis of the threaded hole 21 and the axis of the lock nut is 60 °.

In this embodiment, when the lock nut is loosened, the vibration caused by the loosening of the lock nut is mostly vibration along the axial direction of the lock nut due to the excessive torque or the excessive vibration frequency acting on the lock nut, so that when the threaded hole 21 is properly inclined, the anti-vibration effect of the lock nut is optimal, the oblique pressure can better limit the mutual movement between the lock nut and the shaft along the axial direction, i.e., the lock nut has stronger locking force to the high-frequency vibration.

It should be noted that, in the present embodiment, the embodiment with the preferred inclination 60 ° is selected to exemplify that the inclined threaded hole 21 can provide a better locking effect, but the present invention is not limited thereto, and other inclination angles, for example, fig. 5 is a cross-sectional view of the lock nut with different inclination angles of the threaded hole 21 provided by the present invention, as shown in fig. 5, the locking effect can also be increased when the angle between the axis of the threaded hole 21 and the axis of the lock nut is 90 °, which is not beyond the protection scope of the present invention.

Preferably, the number of the groove 11 and the number of the screw hole 21 are 3. In the present embodiment, the position of the shaft inside the lock nut can be fixed by the forces in the three directions, and the problem that the screw cannot abut against the shaft due to the displacement of the shaft during the movement is avoided, thereby increasing the locking force and the reliability of the locking.

Wherein, preferably, fig. 6 is a schematic structural view of a locking nut provided by the present invention. As shown in fig. 6, in the lock nut, as a preferred embodiment, there are 4 groove portions 11 and 4 screw holes 21. In this embodiment, furthermore, the position of the shaft inside the lock nut can be fixed more reliably by the force in four directions, and the four screw fixation can make the shaft receive two pairs of pressures with opposite directions and the same magnitude, so as to avoid the shaft from receiving the gravity center offset of the shaft caused by the butting in the asymmetric direction, and in addition, the butting in the four directions can ensure that after the screw in one direction loosens, other three screws can still keep the butting with the shaft and provide the pressure to fix the position of the shaft.

Wherein, preferably, fig. 7 is a schematic structural view of a further lock nut provided by the present invention. As shown in fig. 7, the lock nut further includes a boss portion 22 formed to extend in the axial direction from the inner peripheral wall 102.

In the present embodiment, when the lock nut is used as a lock member of the bearing, the boss portion 22 can be brought into close contact with the bearing inner race to perform a bearing positioning function. Therefore, the bearing can be fastened and also can be used as a bearing inner ring compression ring, the bearing inner ring compression ring is particularly suitable for the condition that a space exists between the shaft and the bearing, the space among all components can be saved, and meanwhile, the installation steps of technicians are also saved.

So far, the technical solution of the present invention has been described with reference to the accompanying drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A lock nut formed in a ring shape having an outer peripheral wall with a groove portion formed in an axial direction of the lock nut, characterized by further comprising at least two screw holes penetrating the outer peripheral wall and the inner peripheral wall of the lock nut.

2. The lock nut as claimed in claim 1, wherein the groove portion has a plurality and is uniformly arranged on the outer circumferential wall of the lock nut.

3. The lock nut as claimed in claim 2, wherein said threaded hole is formed between two adjacent said groove portions, and the length of a line connecting the centers of both said groove portions on the axis of said threaded hole is the same.

4. The lock nut as claimed in any one of claims 1 to 3, wherein a ratio of a diameter of said threaded hole to an axial thickness of said lock nut is not more than 2/3.

5. The jam nut of any of claims 1-3, wherein an angle between an axis of the threaded bore and an axis of the jam nut is 60 ° or 90 °.

6. The lock nut as claimed in claim 5, wherein said groove portion and said screw hole are 3 in number.

7. The lock nut as claimed in claim 5, wherein said groove portion and said screw hole are 4.

8. The lock nut as claimed in any one of claims 1 to 3 and 6 to 7, further comprising a boss portion formed to extend in an axial direction from the inner peripheral wall.