CN211901242U - Locking nut assembly and nut locking device - Google Patents
Locking nut assembly and nut locking device Download PDFInfo
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- CN211901242U CN211901242U CN202020375392.0U CN202020375392U CN211901242U CN 211901242 U CN211901242 U CN 211901242U CN 202020375392 U CN202020375392 U CN 202020375392U CN 211901242 U CN211901242 U CN 211901242U
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Abstract
The utility model discloses a lock nut subassembly, nut locking device. The utility model discloses a locking nut component comprises a locking pad, a retaining nut, a disc spring positioning jackscrew and a retaining taper pin; the central hole of the locking pad is a stepped hole with a large upper part and a small lower part, the lower end surface of the locking pad is provided with a plurality of trapezoidal teeth, and the trapezoidal teeth are uniformly distributed along the circumference; the lower section of the retaining nut is cylindrical, the upper section of the retaining nut is hexagonal, and a central hole of the retaining nut is a threaded hole; the lower section of the retaining nut is matched with the large hole of the locking pad, the disc spring is arranged between the upper end surface of the locking pad and the hexagonal lower end surface of the retaining nut, the disc spring positioning jackscrew is arranged in the radial small thread through hole of the locking pad, and the bottom end of the disc spring positioning jackscrew is tightly pressed on the retaining nut; the retaining taper pin penetrates through the locking pad and the retaining nut along the radial direction, and pin holes in two positions on the locking pad are waist-shaped holes. The utility model discloses the lock nut subassembly can prevent effectively that it is not hard up by lock nut, and the footing location is reliable behind the messenger's equipment fixing, need not carry out alignment debugging once more.
Description
Technical Field
The utility model relates to the field of machinary, especially, relate to the structure that locks is carried out the screw.
Background
After the installation and debugging of the existing mechanical equipment are completed, the footing of the equipment needs to be positioned by bolts and nuts to prevent the equipment from loosening, so that the precision of the equipment is ensured. However, after the mechanical equipment runs for a period of time, due to the change of load (such as frequent starting, overload operation, eccentricity and the like), the equipment vibrates to cause the nut to loosen, the conditions of heating and damage of the bearing, burning of the motor and the like can occur to influence production, the equipment needs to be aligned and debugged again, and the equipment is troublesome and cannot be easily ensured to be capable of recovering to the original installation precision. Therefore, in order to prevent the nut from loosening, the currently adopted methods include: adding an elastic washer below the nut; increasing the torque of the wrench; the principle of the method is to increase positive pressure by using methods of fastening double nuts and the like, so that the friction resistance of the loosening of the nuts is increased. However, even with the above method, the device may loosen again after a period of use, and then need to be aligned and debugged. The re-alignment and debugging not only occupy the production time, but also waste a large amount of manpower and material resources. Therefore, nut looseness prevention has been a subject of research in all countries around the world.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a lock nut subassembly, nut locking device are provided. The utility model discloses the lock nut subassembly can prevent effectively that it is not hard up by lock nut, and the footing location is reliable behind the messenger's equipment fixing, need not carry out alignment debugging once more. The utility model discloses form a whole by lock nut and lock nut subassembly among the nut locking device, it takes root on the bolt, can prevent effectively that it is not hard up by lock nut.
The utility model discloses a locking nut component, which comprises a locking pad, a retaining nut, a disc spring positioning jackscrew and a retaining taper pin; the central hole of the locking pad is a stepped hole with a large upper part and a small lower part, the lower end surface of the locking pad is provided with a plurality of trapezoidal teeth, and the trapezoidal teeth are uniformly distributed along the circumference; the lower section of the retaining nut is cylindrical, the upper section of the retaining nut is hexagonal, and a central hole of the retaining nut is a threaded hole; the lower section of the retaining nut is matched with the large hole of the locking pad, the disc spring is arranged between the upper end surface of the locking pad and the hexagonal lower end surface of the retaining nut, the disc spring positioning jackscrew is arranged in the radial small thread through hole of the locking pad, and the bottom end of the disc spring positioning jackscrew is tightly pressed on the retaining nut; the retaining taper pin penetrates through the locking pad and the retaining nut along the radial direction, and pin holes in two positions on the locking pad are waist-shaped holes.
Furthermore, the shape and the size of waist-shaped holes at two positions on the locking pad are the same, and the diameter of the waist-shaped hole is equal to the diameter of the big end of the backstop taper pin.
Further, the tooth top of trapezoidal tooth is the plane in the locking pad, and the cross-sectional shape of trapezoidal tooth is right trapezoid: the left end of the tooth top straight line is connected with the end face through a vertical face, and the right end of the tooth top straight line is connected with the end face through an inclined face.
Further, when 24 trapezoidal teeth are evenly distributed on the end face of the locking pad: wherein, the included angle between the left and right root lines of each tooth is 10 degrees, and the line at the right end of the tooth top is positioned on the angular bisector; the included angle between the left and right lines of the tooth socket is 5 degrees.
The utility model discloses a nut locking device, which comprises a bolt, a locked nut and a locking nut component; the bolt is provided with a left-handed thread and a right-handed thread, the nominal diameter M1 of the thread close to the hexagonal head of the bolt is larger than the nominal diameter M2 of the thread close to the bottom of the bolt, the turning direction of the thread M1 is the same as the turning direction of a threaded hole of a locked nut, and the turning direction of the thread M2 is the same as the turning direction of a threaded hole of a non-return nut; the locking nut is screwed on the thread M1 by the locking nut, and the locking nut component is screwed on the thread M2; the locked nut is connected with the locking nut component through the trapezoidal teeth; the locked nut is tightly pressed on the hexagonal head of the bolt; the locking nut assembly is assembled into a whole through a locking pad, a retaining nut, a disc spring positioning jackscrew and a retaining taper pin.
Furthermore, the number of teeth, the cross-sectional shape of trapezoidal teeth and the shape of tooth grooves of the trapezoidal teeth on the end face of the locked nut are the same as those of the trapezoidal teeth on the end face of the locking pad.
Furthermore, the height h' of the trapezoidal teeth on the end surface of the locked nut is slightly larger than the height h of the trapezoidal teeth in the locking pad.
Further, the pitch p' of the locked nut thread is greater than the pitch p of the retaining nut thread.
The utility model discloses lock nut component through lock stack up with by lock nut both the interlock formation a whole of tooth, and the rotation of screw hole on the stopping nut to again with by lock nut on the screw hole to on the opposite, just so can prevent effectively that it is not hard up by lock nut. In the nut locking device, when the rotation directions of the locked nut and the retaining nut are opposite, the retaining nut is screwed by pushing the bevel edge of the tooth of the locked nut to lock through the bevel edge of the tooth; if the locked nut is loosened, the straight edges of the teeth of the locked nut are contacted with the straight edges of the tooth grooves of the retaining nut, so that the retaining nut is pushed to rotate in the screwing direction, and the locked nut cannot be loosened.
Drawings
FIG. 1 is a front view of the cage nut assembly of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a front view of the locking pad;
FIG. 5 is a bottom view of FIG. 4;
FIG. 6 is a front view of the back stop nut;
FIG. 7 is a schematic view of a bolt;
FIG. 8 is a front view of the locked nut;
FIG. 9 is a top view of FIG. 8;
fig. 10 is a schematic view of the nut lock apparatus of the present invention.
Detailed Description
Example 1
As can be seen from fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, the locking nut assembly of the present invention comprises a locking pad 3, a retaining nut 5, a disc spring 4, a disc spring positioning jackscrew 1 and a retaining taper pin 2; the central hole of the locking pad 3 is a stepped hole with a large upper part and a small lower part, the lower end surface of the locking pad is provided with a plurality of trapezoidal teeth, and the trapezoidal teeth are uniformly distributed along the circumference; the lower section of the retaining nut 5 is cylindrical, the upper section of the retaining nut is hexagonal, and the central hole of the retaining nut is a threaded hole; the lower section of the retaining nut 5 is matched with the large hole of the locking pad 3, the disc spring 4 is arranged between the upper end surface of the locking pad 3 and the hexagonal lower end surface of the retaining nut 5, the disc spring positioning jackscrew 1 is arranged in the radial small thread through hole of the locking pad 3, and the bottom end of the disc spring positioning jackscrew is tightly pressed on the retaining nut 5; the retaining taper pin 2 penetrates through the locking pad 3 and the retaining nut 5 along the radial direction, and pin holes in two positions on the locking pad 3 are waist-shaped holes. Wherein, the conicity of the stop taper pin 2 is 1: 50.
when the utility model is assembled, the disc spring 4 is firstly sleeved on the lower section of the retaining nut 5, then the lower section of the retaining nut 5 is arranged in the large hole of the locking pad 3, the disc spring 4 is tightly pressed on the upper end surface of the locking pad 3, then the disc spring positioning jackscrew 1 is arranged, and then the round hole of the pin hole is drilled; at the moment, the locking pad 3, the retaining nut 5, the disc spring 4 and the disc spring positioning jackscrew 1 are disassembled, and finally two pin holes in the locking pad 3 are independently processed to form a waist-shaped hole by taking the round hole as the center. In the use process, the retaining taper pin 2 can ensure the relative position relation between the retaining nut 5 and the locking pad 3, thereby ensuring the locking reliability of the locking nut component. Meanwhile, when the whole locking nut assembly is required to be disassembled, the retaining taper pin 2 can be taken out.
Use the utility model discloses during the lock nut subassembly, also set up trapezoidal tooth on being filled up with the locking by lock nut and locking, through the locking fill up with form a whole by the interlock of lock nut both teeth, and the screw hole on the stopping nut revolve to again with by the lock nut on the screw hole revolve to on opposite, just so can prevent effectively that not hard up by the lock nut.
Example 2
The utility model discloses lock nut assembly: the shape and the size of waist-shaped holes at two positions on the locking pad 3 are the same, and the diameter of the waist-shaped hole is equal to the diameter of the big end of the backstop taper pin 2.
Therefore, the small head of the retaining taper pin 2 can not contact with the waist-shaped hole and can not bear force, the retaining taper pin 2 is prevented from moving from the small diameter to the large diameter to be loosened, the locking pad 3 and the retaining nut are prevented from being loosened, and the locking reliability is guaranteed. Meanwhile, when the disc spring positioning jackscrew 1 is loosened, the locking pad 3 moves under the action of the disc spring 4, and the kidney-shaped hole ensures the movement of the locking pad 3. The retaining taper pin 2 is in clearance fit with the pin hole.
Example 3
The utility model discloses lock nut assembly: the tooth top of trapezoidal tooth is the plane in the locking pad 3, and the cross-sectional shape of trapezoidal tooth is right trapezoid: the left end of the tooth top straight line is connected with the end face through a vertical face, and the right end of the tooth top straight line is connected with the end face through an inclined face. Thus, one face of the tooth is a bevel and the other face is a straight face, and one face of the tooth slot is a bevel and the other face is a straight face. The trapezoidal surface is mainly beneficial to the end surface teeth to enter the tooth grooves, and the straight surface is mainly used for preventing the nut from loosening.
When 24 trapezoidal teeth are evenly distributed on the end surface of the locking pad 3: wherein, the included angle between the left and right root lines of each tooth is 10 degrees, and the line at the right end of the tooth top is positioned on the angular bisector; the included angle between the left and right lines of the tooth socket is 5 degrees.
The number of the trapezoidal grooves on the end surface is designed according to the torque and the adjacent groove tooth indexing: in view of strength, the more the teeth are divided, the narrower the tooth width is, and the more the teeth are broken, so if the torque of the end face trapezoidal groove nut is larger, the more the number of teeth which are difficult to be divided is, and the specific number is calculated by strength; the more teeth are indexed in terms of tightening, the better the tightening effect. Therefore, in the case where the torque is not large, the fastening effect is better as the number of teeth is larger, such as 72 teeth, 36 teeth, and the like.
Example 4
As can be seen from fig. 10, the nut locking device of the present invention includes a bolt 6, a locked nut 7, and a locking nut assembly 8; the bolt 6 is provided with two sections of left-handed and right-handed threads, the nominal diameter M1 of the thread close to the hexagonal head of the bolt is larger than the nominal diameter M2 of the thread close to the bottom of the bolt, the turning direction of the thread M1 is the same as the turning direction of a threaded hole of the locked nut 7, and the turning direction of the thread M2 is the same as the turning direction of a threaded hole of the retaining nut 5; the locking nut 7 is screwed on the thread M1, and the locking nut component 8 is screwed on the thread M2; the locked nut 7 is connected with the locking nut component 8 through trapezoidal teeth; the locked nut 7 is firmly buckled at the hexagonal head of the bolt 6 by the end face teeth; the locking nut component 8 is assembled into a whole by the locking pad 3, the retaining nut 5, the disc spring 4, the disc spring positioning jackscrew 1 and the retaining taper pin 2.
The number of teeth of the trapezoidal teeth, the cross-sectional shape of the trapezoidal teeth and the shape of the tooth grooves on the end face of the locked nut 7 are the same as those of the trapezoidal teeth on the end face of the locking pad 3. That is, the locknut 7 and the locknut assembly 8 are engaged with each other integrally by the teeth on the end surfaces of the locknut 7 and the lock pad 3.
Specifically, the end face teeth of the nut are oblique edges along the fastening direction of the nut, and are straight edges along the loosening direction of the nut, so that when the fastened nut 7 and the retaining nut 5 (locking nut component 8) are rotated in opposite directions, the retaining nut 5 (locking nut component 8) is screwed up by pushing the oblique edges of tooth grooves of the fastened nut 7 through the oblique edges of the teeth to lock; if the locked nut 7 is loosened, the straight edge of the teeth of the locked nut is contacted with the straight edge of the tooth groove of the retaining nut 5 (the locking nut component 8), so that the retaining nut 5 (the locking nut component 8) is pushed to rotate towards the screwing direction, and the looseness can not be generated (namely, the looseness prevention purpose is achieved through the balance of the positive and negative two strands of torque).
Wherein, the height h' of the trapezoidal teeth of the locked nut 7 is slightly larger than the height h of the trapezoidal teeth of the locking pad 3.
For example, the following steps are carried out: for example, the height h' of the trapezoidal teeth of the locked nut 7 is 2.5mm, and the height h of the trapezoidal teeth of the locking pad 3 is 2 mm. The height of locking the trapezoidal tooth of nut is h '═ 2.5mm, the degree of depth that also expresses its tooth's socket is 2.5mm, and the height h of locking pad 3 trapezoidal tooth is 2mm, consequently, the trapezoidal tooth of locking pad 3 is embedded into when the tooth's socket by locking nut 7, the tooth root by locking nut can not be touchhed to the tooth top of locking pad, make the trapezoidal tooth of locking pad all in the tooth's socket by locking nut, guaranteed the locking pad and the reliability of being connected by the locking nut interlock, then guaranteed locking quality, prevent to become flexible better.
Wherein, the thread pitch p' of the screw thread of the locking nut 7 is larger than the thread pitch p of the screw thread of the retaining nut 5.
Like this, by locknut 7 and backstop nut 5 along axial distance the same, the number of turns of the closure of backstop nut 5 is more than by the lock nut's number of turns of the closure of turning, therefore backstop nut 5 can fully realize being locked by locknut 7.
When the nut locking device is used, firstly, a locking pad 3, a retaining nut 5, a disc spring 4, a disc spring positioning jackscrew 1 and a retaining taper pin 2 are assembled to form a locking nut component 8; secondly, after the bolt 6 passes through the bottom foot of the equipment 9, the locked nut 7 is screwed on the thread M1 of the bolt 6; then the locking nut component 8 is screwed on the bolt 6, wherein the backstop nut 5 is screwed with the thread M2 of the bolt 6; thirdly, when the tooth crest of the locking nut component 8 (the locking pad 3) is away from the tooth crest of the locked nut 7 by a certain distance L, the disc spring positioning jackscrew 1 is screwed out, so that the disc spring 4 is bounced to enable the locking pad 3 to move downwards, and the trapezoidal teeth on the lower end surface of the locking pad are tightly embedded into the tooth grooves of the locked nut 7 to enable the locking pad and the locking pad to form a whole; the lock nut assembly 8 is then continued to be screwed in until the belleville spring 4 is compressed into place (at which point the locked nut 7 is pressed tightly against the foot of the device 9).
Wherein "L" in step three is smaller than the compression amount of the disc spring 4. Thus, when the disc spring positioning jackscrew 1 is screwed out of the disc spring 4 to be bounced, the trapezoidal teeth on the locking pad 3 can be ensured to be tightly embedded into the tooth grooves of the locked nut 7, so that the locking pad and the locked nut are integrated.
When the locking nut component 8 is pressed on the bottom foot of the equipment by the locking nut 7, the locking nut component 8 (the locking pad 3) and the locked nut 7 form a whole body through the occlusion of the trapezoidal teeth, in addition, the thread turning directions of the locking nut 7 and the locking nut component 8 stopping the back nut 5 are opposite, the loosening direction of the locked nut 7 is just the locking direction of the back nut 5, and therefore, the locking nut component 8 can be effectively prevented from being loosened by the locking nut 7. Therefore, the locknut assembly 8 is equivalent to being rooted on the bolt 6, and the looseness of the locknut 7 can be effectively prevented. When the equipment 9 needs to be moved or other situations need to detach the locking nut component 8, the anti-backing taper pin 2 in the locking nut component 8 is knocked out by a hand hammer.
The utility model discloses lock nut subassembly, nut locking device can effectively prevent by lock nut to the direction rotation of pine, have thoroughly changed the method that current fastener prevents not hard up, are a brand-new fastener locking structure, make locking more effective. The utility model discloses the value that has general popularization.
Claims (8)
1. Lock nut subassembly, characterized by: the locking device comprises a locking pad (3), a backstop nut (5), a disc spring (4), a disc spring positioning jackscrew (1) and a backstop taper pin (2); the central hole of the locking pad (3) is a stepped hole with a large upper part and a small lower part, and the lower end surface of the locking pad is provided with a plurality of trapezoidal teeth which are uniformly distributed along the circumference; the lower section of the retaining nut (5) is cylindrical, the upper section of the retaining nut is hexagonal, and the center hole of the retaining nut is a threaded hole; the lower section of the retaining nut (5) is matched with the large hole of the locking pad (3), the disc spring (4) is arranged between the upper end surface of the locking pad (3) and the hexagonal lower end surface of the retaining nut (5), the disc spring positioning jackscrew (1) is arranged in the radial small thread through hole of the locking pad (3), and the bottom end of the disc spring positioning jackscrew is tightly pressed on the retaining nut (5); the retaining taper pin (2) penetrates through the locking pad (3) and the retaining nut (5) along the radial direction, and pin holes in two positions on the locking pad (3) are waist-shaped holes.
2. The cage nut assembly of claim 1 wherein: the shape and the size of waist-shaped holes at two positions on the locking pad (3) are the same, and the diameter of the waist-shaped hole is equal to the diameter of the big end of the backstop taper pin (2).
3. The cage nut assembly of claim 1 wherein: the tooth top of trapezoidal tooth is the plane in locking pad (3), and the cross-sectional shape of trapezoidal tooth is right trapezoid: the left end of the tooth top straight line is connected with the end face through a vertical face, and the right end of the tooth top straight line is connected with the end face through an inclined face.
4. The cage nut assembly of claim 3 wherein: when 24 trapezoidal teeth are evenly distributed on the end surface of the locking pad (3): wherein, the included angle between the left and right root lines of each tooth is 10 degrees, and the line at the right end of the tooth top is positioned on the angular bisector; the included angle between the left and right lines of the tooth socket is 5 degrees.
5. Nut locking device, characterized by: it comprises a bolt (6), a locked nut (7) and a locking nut component (8) according to any one of claims 1-4; the bolt (6) is provided with a left-handed thread and a right-handed thread, the nominal diameter M1 of the thread close to the hexagonal head of the bolt is larger than the nominal diameter M2 of the thread close to the bottom of the bolt, the turning direction of the thread M1 is the same as the turning direction of a threaded hole of the locked nut (7), and the turning direction of the thread M2 is the same as the turning direction of a threaded hole of the retaining nut (5); the locking nut (7) is screwed on the thread M1, and the locking nut component (8) is screwed on the thread M2; the locked nut (7) is connected with the locking nut component (8) through trapezoidal teeth; the locked nut (7) is tightly pressed on the hexagonal head of the bolt (6); the locking nut component (8) is assembled into a whole through the locking pad (3), the retaining nut (5), the disc spring (4), the disc spring positioning jackscrew (1) and the retaining taper pin (2).
6. The nut locking apparatus of claim 5 wherein: the number of teeth, the cross-sectional shape of the trapezoidal teeth and the shape of the tooth grooves of the trapezoidal teeth on the end surface of the locked nut (7) are the same as those of the trapezoidal teeth on the end surface of the locking pad (3).
7. The nut locking apparatus of claim 6 wherein: the height h' of the trapezoidal teeth on the end surface of the locked nut (7) is slightly larger than the height h of the trapezoidal teeth in the locking pad (3).
8. The nut locking apparatus of claim 5 wherein: the thread pitch p' of the thread of the locked nut (7) is greater than the thread pitch p of the thread of the retaining nut (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020375392.0U CN211901242U (en) | 2020-03-23 | 2020-03-23 | Locking nut assembly and nut locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020375392.0U CN211901242U (en) | 2020-03-23 | 2020-03-23 | Locking nut assembly and nut locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901242U true CN211901242U (en) | 2020-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020375392.0U Active CN211901242U (en) | 2020-03-23 | 2020-03-23 | Locking nut assembly and nut locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211901242U (en) |
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2020
- 2020-03-23 CN CN202020375392.0U patent/CN211901242U/en active Active
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