CN111271364A - Locking nut assembly, nut locking device and nut locking method - Google Patents
Locking nut assembly, nut locking device and nut locking method Download PDFInfo
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- CN111271364A CN111271364A CN202010208162.XA CN202010208162A CN111271364A CN 111271364 A CN111271364 A CN 111271364A CN 202010208162 A CN202010208162 A CN 202010208162A CN 111271364 A CN111271364 A CN 111271364A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 210000003781 tooth socket Anatomy 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a locking nut assembly, a nut locking device and a nut locking method. The locking nut assembly 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 locking nut assembly can effectively prevent the locked nut from loosening, so that the bottom foot of the equipment is reliably positioned after the equipment is installed, and alignment and debugging are not required again.
Description
Technical Field
The invention relates to the field of machinery, in particular to a structure and a method for locking a nut.
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.
Disclosure of Invention
The invention aims to provide a locking nut assembly, a nut locking device and a nut locking method. The locking nut assembly can effectively prevent the locked nut from loosening, so that the bottom foot of the equipment is reliably positioned after the equipment is installed, and alignment and debugging are not required again. The locked nut and the locking nut component in the nut locking device form a whole, and the whole is rooted on the bolt, so that the locked nut can be effectively prevented from loosening.
The invention discloses a locking nut assembly 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 nut locking device comprises a bolt, a locked nut and a locking nut assembly as claimed in any one of claims 1 to 4; 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 nut locking method comprises the steps of ①, assembling a locking pad, a backstop nut, a disc spring positioning jackscrew and a backstop taper pin to form a locking nut assembly, ②, screwing the locking nut assembly on a screw thread M1 of a bolt after the bolt penetrates through a bottom foot of equipment, screwing the locking nut assembly on the bolt, wherein the backstop nut is screwed with the screw thread M2 of the bolt, ③, screwing out the spring positioning jackscrew when the tooth top surface of the locking nut assembly (the locking pad) is away from the tooth top surface of the locking nut by a certain distance L, enabling the disc spring to bounce to enable the locking pad to move downwards, enabling the trapezoidal teeth on the lower end surface of the locking nut to be tightly embedded into the tooth grooves of the locking nut to form a whole, ④, and continuing to screw the locking nut assembly until the disc spring is compressed in place (at the moment, the locking nut is tightly pressed on the bottom foot of the equipment).
Further, "L" in step three is smaller than the compression amount of the disc spring.
The locking nut assembly of the invention forms a whole by the occlusion of the teeth of the locking pad and the locked nut, and the rotation direction of the threaded hole on the retaining nut is opposite to that of the threaded hole on the locked nut, thus effectively preventing the locked nut from loosening. In the nut locking device, when the rotation directions of the locked nut and the backstop nut are opposite, the backstop nut is screwed by pushing the bevel edge of the tooth socket of the locked nut through the bevel edge of the tooth of the backstop nut to lock; 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 lock nut assembly of the present invention comprises a lock 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, 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.
during assembly, firstly, a disc spring 4 is sleeved on the lower section of a retaining nut 5, then, the lower section of the retaining nut 5 is arranged in a large hole of a locking pad 3, the disc spring 4 is tightly pressed on the upper end surface of the locking pad 3, then, a disc spring positioning jackscrew 1 is arranged, and then, a round hole of a 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.
When the locking nut assembly is used, the trapezoidal teeth are arranged on the end face of the locked nut corresponding to the locking pad, the locking pad and the locked nut are meshed to form a whole, and the rotation direction of the threaded hole in the retaining nut is opposite to that of the threaded hole in the locked nut, so that the locked nut can be effectively prevented from loosening.
Example 2
The lock nut assembly of the invention: 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 lock nut assembly of the invention: 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 lock device of the present invention includes a bolt 6, a to-be-locked nut 7, a lock 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.
Example 5
A nut locking method includes the steps of ①, firstly assembling a locking pad 3, a backstop nut 5, a disc spring 4, a disc spring positioning jackscrew 1 and a backstop taper pin 2 to form a locking nut component 8, ②, screwing a locked nut 7 on a thread M1 of a bolt 6 after the bolt 6 penetrates through a bottom foot of equipment 9, then screwing the locking nut component 8 on the bolt 6, wherein the backstop nut 5 is screwed with the thread M2 of the bolt 6, ③, screwing the disc spring positioning jackscrew 1 out when the tooth crest surface of the locking nut component 8 (the locking pad 3) is away from the tooth crest surface of the locked nut 7 by a certain distance L, enabling the disc spring 4 to bounce to enable the locking pad 3 to move downwards, enabling trapezoidal teeth on the lower end surface of the locking pad 3 to be tightly embedded into tooth grooves of the locked nut 7 to form a whole, ④, and then continuing screwing the locking nut component 8 until the disc spring 4 is compressed in place (at the moment, the locked nut 7 is tightly pressed on the bottom foot of the equipment 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 locking nut component and the nut locking device can effectively prevent the locked nut from rotating towards the loosening direction, thoroughly change the method for preventing the loosening of the conventional fastener, are a brand new fastener locking structure and enable the locking to be more effective. The invention has the value of popularization.
Claims (10)
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).
9. The nut locking method comprises the following steps:
①, assembling a locking pad (3), a retaining nut (5), a disc spring (4), a disc spring positioning jackscrew (1) and a retaining taper pin (2) to form a locking nut component (8);
②, after the bolt (6) passes through the bottom foot of the equipment (9), firstly screwing the locked nut (7) on the thread M1 of the bolt (6), then screwing the locking nut component (8) on the bolt (6), wherein the retaining nut (5) is screwed with the thread M2 of the bolt (6);
③, when the tooth top of the locking nut component (8) (locking pad) is a certain distance L away from the tooth top of the locked nut (7), the disc spring positioning jackscrew (1) is screwed out, the disc spring (4) is bounced, so that the locking pad (3) moves downwards, the trapezoidal teeth on the lower end surface of the locking pad are tightly embedded into the tooth groove of the locked nut (7), and the locking pad and the locking nut form a whole;
④, and then continues to tighten the lock nut assembly (8) until the belleville spring (4) is compressed into place (at which point the lock nut is pressed against the foot of the device).
10. The nut lock apparatus as claimed in claim 7, wherein "L" in step ③ is smaller than the compression amount of the disc spring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208162.XA CN111271364B (en) | 2020-03-23 | 2020-03-23 | Lock nut assembly, nut locking device and nut locking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208162.XA CN111271364B (en) | 2020-03-23 | 2020-03-23 | Lock nut assembly, nut locking device and nut locking method |
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| Publication Number | Publication Date |
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| CN111271364A true CN111271364A (en) | 2020-06-12 |
| CN111271364B CN111271364B (en) | 2024-06-04 |
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| CN202010208162.XA Active CN111271364B (en) | 2020-03-23 | 2020-03-23 | Lock nut assembly, nut locking device and nut locking method |
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| CN111271364B (en) | 2024-06-04 |
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