CN113483006A - Single nut locking structure - Google Patents
Single nut locking structure Download PDFInfo
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- CN113483006A CN113483006A CN202110747125.0A CN202110747125A CN113483006A CN 113483006 A CN113483006 A CN 113483006A CN 202110747125 A CN202110747125 A CN 202110747125A CN 113483006 A CN113483006 A CN 113483006A
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- 238000010168 coupling process Methods 0.000 claims description 31
- 230000008878 coupling Effects 0.000 claims description 28
- 238000005859 coupling reaction Methods 0.000 claims description 28
- 239000003292 glue Substances 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000008569 process Effects 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
- F16B39/04—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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- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
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- Engineering & Computer Science (AREA)
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Abstract
The invention provides a single-nut locking structure, which comprises a nut, a connecting piece and a set screw, wherein the nut is fixedly connected with the connecting piece; the nut comprises an internal thread section and a hole section which are connected along the axial direction, the thread diameter of the internal thread section is larger than the aperture of the hole section, at least one plane is arranged on the outer side of the hole section along the circumferential direction, and a thread through hole is formed in the plane; the connecting piece comprises a first shaft section, an external thread section, a second shaft section and a third shaft section which are sequentially connected along the axial direction, the thread diameter of the external thread section is larger than that of the first shaft section and smaller than that of the second shaft section, the diameter of the third shaft section is larger than that of the second shaft section, the first shaft section is provided with at least one annular groove along the circumferential direction, and the locked part is sleeved on the second shaft section of the connecting piece; the nut is sleeved on the first shaft section and the external thread section of the connecting piece; after the nut is screwed in place under the preset torque, the set screw penetrates through the threaded through hole and then extends into the annular groove. The invention solves the problem that the existing screw thread anti-loosening can not meet the requirements of high reliability, easy installation and disassembly and repeated use at the same time.
Description
Technical Field
The invention relates to the technical field of threaded connection, in particular to a single-nut locking structure.
Background
In the field of aerospace delivery, a thrust vector servo mechanism adopting an electromechanical servo technology usually takes a ball screw as a transmission link of an output stage. However, the bearing for supporting the ball screw is sometimes limited by the structural layout and the assembly process of the servo mechanism, and the bearing cannot be positioned by using all the structural hole shoulders and the shaft shoulders. Especially for a servo mechanism with long zero position length and large stroke, two ball screw support bearings are generally coaxially arranged between a screw rod and a nut side by side, one end of an outer inner ring of the two parallel bearings is positioned by a screw rod structure shaft shoulder, and the other end of the outer inner ring is usually locked and positioned by the nut.
The locking of the screw thread is a problem to be considered in a nut locking and positioning mode. The currently common thread anti-loosening mode mainly comprises the following steps: friction locking, mechanical locking and thread pair damage locking. The friction anti-loosening device has the characteristics of convenience in disassembly, low reliability and particularly under the action of vibration and impact; the mechanical anti-loosening characteristic is high in reliability, but the installation is complicated; the characteristic of destroying the looseness prevention of the thread pair is that the looseness prevention is reliable but the thread pair cannot be used repeatedly.
Therefore, the existing screw thread looseness prevention can not meet the requirements of high reliability, easy installation and disassembly and repeated use at the same time, and can not be used for a thrust vector servo mechanism under the environment of large impact and strong vibration.
Disclosure of Invention
The invention provides a single-nut locking structure which can solve the technical problem that the existing screw thread locking cannot meet the requirements of high reliability, easiness in mounting and dismounting and reusability at the same time.
The invention provides a single-nut locking structure, which comprises a nut, a connecting piece and a set screw, wherein the nut is arranged on the connecting piece;
the nut comprises an internal thread section and a hole section which are connected along the axial direction, the thread diameter of the internal thread section is larger than the aperture of the hole section, at least one plane is arranged on the outer side of the hole section along the circumferential direction, and a thread through hole is formed in the plane;
the coupling comprises a first shaft section, an external thread section, a second shaft section and a third shaft section which are sequentially connected along the axial direction, the thread diameter of the external thread section is larger than that of the first shaft section and smaller than that of the second shaft section, the diameter of the third shaft section is larger than that of the second shaft section, the first shaft section is circumferentially provided with at least one annular groove, and a locked part is sleeved on the second shaft section of the coupling;
the nut is sleeved on the first shaft section and the external thread section of the connecting piece, the internal thread section is matched with the external thread section, and the hole section is matched with the first shaft section;
after the nut is screwed in place under the preset torque, the set screw penetrates through the threaded through hole and then extends into the annular groove to lock the locked part.
Preferably, the number of the annular grooves is multiple, the number of the thread through holes is the same as that of the annular grooves, the annular grooves are arranged along the axial direction of the connecting piece at equal intervals, the thread through holes are arranged along the axial direction of the nut at equal intervals, the difference between the axial interval between every two adjacent annular grooves and the axial interval between every two adjacent thread through holes is equal to the minimum adjustment thickness of the gasket between the locked parts, and after the nut is screwed in place under the preset torque, one annular groove is aligned with one thread through hole.
Preferably, in the case where only one shim having a minimum adjustment thickness is included between the locked members, a first one of the annular grooves adjacent to the external thread section is aligned with a first one of the threaded through holes adjacent to the internal thread section after the nut is screwed into place at a predetermined torque.
Preferably, each plane is provided with one threaded through hole.
Preferably, the annular groove is an annular V-shaped groove.
Preferably, thread glue is arranged between the set screw and the thread through hole.
Preferably, the thread glue is non-detachable thread glue.
Preferably, an internal thread tool withdrawal groove is formed in one side, close to the hole section, of the internal thread section, and an external thread tool withdrawal groove is formed in one side, close to the second shaft section, of the external thread section.
Preferably, the effective screw length between the nut and the coupling member is not less than 6 to 7 times the pitch of the thread.
Preferably, the hole section is in clearance fit with the first shaft section.
By applying the technical scheme of the invention, the annular groove is formed in the first shaft section, so that when the nut is screwed again, the set screw can still be smoothly inserted into the annular groove, and the requirement of repeated use is met; meanwhile, the set screw and the thread connection are respectively arranged on different axial sections, so that the problem that the set screw is directly screwed on the external thread and the set screw extrudes the thread teeth to damage the set screw is avoided, and the connection reliability is improved. The structure of the invention can meet various complex working conditions, has high reliability, convenient installation and disassembly, simple structure, small axial space occupation, easy processing and manufacturing and low cost; the invention is suitable for the thrust vector servo mechanism and strongly ensures the normal work of the thrust vector servo mechanism under the environment of large impact and strong vibration.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 illustrates an exploded view of a single nut locking arrangement provided in accordance with an embodiment of the present invention;
FIG. 2 illustrates a cross-sectional view of a single nut locking arrangement provided in accordance with an embodiment of the present invention;
FIG. 3 illustrates a coupling diagram including a shim according to an embodiment of the present invention;
FIG. 4 illustrates a coupling diagram including two shims provided in accordance with an embodiment of the present invention.
Wherein the figures include the following reference numerals:
1. a nut; 11. an internal thread section; 111. an internal thread tool withdrawal groove; 12. a bore section; 121. a plane; 122. a threaded through hole; 2. a coupling member; 21. a first shaft section; 211. an annular groove; 22. an external threaded section; 221. an external thread withdrawal groove; 23. a second shaft section; 24. a third shaft section; 3. tightening the screw; 4. a support bearing; 5. and (7) a gasket.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and 2, the present invention provides a single nut locking structure, which includes a nut 1, a coupling member 2, and a set screw 3;
the nut 1 comprises an internal thread section 11 and a hole section 12 which are connected along the axial direction, the thread diameter of the internal thread section 11 is larger than the aperture of the hole section 12, at least one plane 121 is arranged on the outer side of the hole section 12 along the circumferential direction, and a thread through hole 122 is arranged on the plane 121;
the coupling 2 comprises a first shaft section 21, an external thread section 22, a second shaft section 23 and a third shaft section 24 which are connected in sequence along the axial direction, the thread diameter of the external thread section 22 is larger than that of the first shaft section 21 and smaller than that of the second shaft section 23, the diameter of the third shaft section 24 is larger than that of the second shaft section 23, the first shaft section 21 is provided with at least one annular groove 211 along the circumferential direction, and a locked component is sleeved on the second shaft section 23 of the coupling 2;
the nut 1 is sleeved on the first shaft section 21 and the external thread section 22 of the coupling member 2, the internal thread section 11 is matched with the external thread section 22, and the hole section 12 is matched with the first shaft section 21;
after the nut 1 is screwed in place under the preset torque, the set screw 3 penetrates through the threaded through hole 122 and then extends into the annular groove 211 to lock the locked component.
According to the invention, the annular groove 211 is arranged on the first shaft section 21, so that when the nut 1 is screwed in again, the set screw 3 can still be smoothly inserted into the annular groove 211, and the requirement of repeated use is met; meanwhile, the set screw 3 and the thread connection are respectively arranged on different axial sections, so that the problem that the set screw 3 is directly screwed on the external thread and the set screw 3 extrudes thread teeth to damage the thread teeth is avoided, and the connection reliability is improved. The structure of the invention can meet various complex working conditions, has high reliability, convenient installation and disassembly, simple structure, small axial space occupation, easy processing and manufacturing and low cost; the invention is suitable for the thrust vector servo mechanism and strongly ensures the normal work of the thrust vector servo mechanism under the environment of large impact and strong vibration.
In the invention, the nut 1 and the coupling member 2 are coupled together through respective internal threads and external threads, and after the nut 1 is screwed in place, the set screw 3 is screwed into the annular groove 211 of the coupling member 2 along the threaded through hole 122 on the nut 1. The loosening of the threaded connection is characterized in that the nut 1 generates circular rotation movement and further generates axial movement, and the set screw 3 inserted into the threaded through hole 122 of the nut 1 and the annular groove 211 of the connecting piece 2 prevents the nut 1 from moving along the axial direction, so that the nut 1 is prevented from loosening the circular rotation movement, namely, the positioning and locking functions of the threaded connection are realized.
Further, the small diameter of the internal thread section 11 is larger than the aperture of the hole section 12; the minor diameter of the external thread section 22 is larger than the diameter of the first shaft section 21, and the major diameter of the external thread section 22 is smaller than the diameter of the second shaft section 23.
According to an embodiment of the present invention, the number of the annular grooves 211 is plural, the number of the through holes 122 is the same as the number of the annular grooves 211, the plural annular grooves 211 are arranged along the axial direction of the coupling member 2 at equal intervals, the plural through holes 122 are arranged along the axial direction of the nut 1 at equal intervals, a difference between an axial interval between every two adjacent annular grooves 211 and an axial interval between every two adjacent through holes 122 is equal to a minimum adjustment thickness of the gasket 5 between the locked components, and after the nut 1 is screwed into place under a preset torque, a certain one of the annular grooves 211 is aligned with a certain one of the through holes 122.
Because the annular groove 211 can be matched with the set screw 3 to realize the locking effect under the condition of a certain width, and the width is larger than the minimum adjustment thickness of the gasket 5 between the locked components, in order to ensure that the annular groove 211 has complete structure and does not interfere with each other, the invention is provided with a plurality of annular grooves 211 and a plurality of threaded through holes 122, and the difference between the axial distance between every two adjacent annular grooves 211 and the axial distance between every two adjacent threaded through holes 122 is equal to the minimum adjustment thickness of the gasket 5 between the locked components, so as to adapt to the change of the number of the gaskets 5 between the locked components on the connecting piece 2, and ensure that the minimum thickness adjustment of each time of the number of the gaskets 5 can correspond to one group of the threaded through holes 122 and the annular groove 211 with complete structure. The thickness of the spacer 5 for adjustment may be the minimum adjustment thickness or an integral multiple of the minimum adjustment thickness.
Specifically, the number of the annular groove 211 and the threaded through hole 122 should be determined according to the adjustment requirement of the gasket 5 between the locked components.
Further, the locked member may be the support bearing 4.
According to an embodiment of the present invention, in the case that only one spacer 5 with the minimum adjustment thickness is included between the locked components, after the nut 1 is screwed in place at the preset torque, the first annular groove 211 adjacent to the external thread section 22 is aligned with the first threaded through hole 122 adjacent to the internal thread section 11, so as to ensure that when the number of subsequent spacers 5 is changed, one threaded through hole 122 is aligned with each annular groove 211 after the nut 1 is screwed in place at the preset torque.
With the above arrangement, the structure can achieve maximum adjustment of the number of the spacers 5 between the locked members.
Specifically, assuming that the axial distance between every two adjacent annular grooves 211 is a, and the minimum adjustment thickness of the gasket 5 between the locked components is b, the axial distance between every two adjacent threaded through holes 122 should be set to a-b, so as to ensure that every additional gasket 5 between the locked components has one annular groove 211 aligned with the threaded through hole 122 to realize the locking of the locked components, where a > b.
According to an embodiment of the present invention, each of the planes 121 is provided with one of the threaded through holes 122.
Since the axial distance between two adjacent threaded through holes 122 is often smaller than the diameter of the threaded through holes 122, each threaded through hole 122 is respectively arranged on different planes 121, so that the axial size of the nut 1 is reduced while the threaded through holes 122 are prevented from interfering with each other.
According to an embodiment of the present invention, the annular groove 211 is an annular V-shaped groove to achieve a better locking effect.
According to an embodiment of the present invention, a threaded glue is disposed between the set screw 3 and the threaded through hole 122 to achieve a better locking effect. The structure of the invention is not limited by the specification of the thread, and the problem of poor locking effect of the thread compound on the large-specification thread is avoided.
According to an embodiment of the invention, the thread glue is non-detachable thread glue to achieve a better locking effect. The invention can also adopt detachable thread glue.
According to an embodiment of the present invention, an internal thread relief groove 111 is formed on a side of the internal thread section 11 close to the hole section 12, and an external thread relief groove 221 is formed on a side of the external thread section 22 close to the second shaft section 23, so as to facilitate manufacturing.
According to an embodiment of the invention, the effective screwing length of the thread between the nut 1 and the coupling member 2 is not less than 6 to 7 times of thread pitch, so that the nut 1 and the coupling member 2 have better coupling effect.
According to an embodiment of the present invention, the hole section 12 and the first shaft section 21 are in clearance fit, so that the nut 1 can be smoothly screwed into the coupling member 2.
The coupling of the locking structure of the invention comprises the following steps:
step one, the nut 1 is screwed onto the coupling 2 with a specific torque. Specifically, a preset torque of the torque wrench is adjusted to a specific torque, the torque is determined according to the requirements of actual working conditions by referring to relevant standards, the head of the torque wrench can be clamped on the plane 121 of the nut 1, and the nut 1 is screwed on the connector 2 through the torque wrench; and stopping screwing when the nut 1 compresses the supporting bearing 4 needing to be positioned and locked and reaches the preset torque of the torque wrench.
And step two, coating thread glue on the thread teeth of the set screw 3. Specifically, a thread compound is applied to the thread ridge of the lower middle portion of the set screw 3.
And step three, screwing the set screws 3 into the corresponding threaded through holes 122 according to the number of the gaskets 5 between the positioned and locked support bearings 4 until the set screws 3 are inserted into the annular grooves 211.
And step four, when the locking structure of the single nut 1 needs to be disassembled, screwing the set screw 3 out of the threaded through hole 122.
And fifthly, screwing the nut 1 out of the connecting piece 2. Specifically, the nut 1 is back-torqued out of the coupling 2 using a torque wrench, the head of which may be clamped against the flat 121 of the nut 1.
In the second step, before determining that the quantity of the gaskets 5 between the positioned and locked support bearings 4 is not adjusted, thread glue is not coated; after the quantity of the gaskets 5 between the positioned and locked support bearings 4 is determined to be not adjusted any more, non-detachable anaerobic type thread glue can be optionally coated.
In the third step, if the screwed-in set screw 3 is coated with thread glue, after the set screw 3 is screwed in place, the set screw 3 should be kept from moving and kept in a standing state. The specific standing time is determined according to the curing time of the used thread compound.
In step four, before the set screw 3 coated with the non-detachable thread paste is detached, the thread through hole 122 screwed into the set screw 3 should be locally heated.
The reusable single nut locking structure is described below with reference to specific embodiments.
When only one spacer 5 with the minimum thickness of the adjusting unit is arranged between the support bearings 4 positioned and locked on the coupling member 2, the nut 1 is screwed on the coupling member 2 according to the coupling method of the single nut locking structure provided by the present invention, and the set screw 3 is screwed into the first threaded through hole 122 adjacent to the internal thread and extends into the first annular groove 211 adjacent to the external threaded section 22, as shown in fig. 3.
When the space between the positioned and locked support bearings 4 on the coupling part 2 needs to be adjusted to contain two gaskets 5 with the thickness of the minimum adjusting unit, the structure in the embodiment is removed by referring to the single-nut locking structure coupling method provided by the invention. After the second gasket 5 is added, the nut 1 is screwed to the coupling member 2 by referring to the coupling method of the single nut locking structure provided in the present invention, and the set screw 3 should be screwed into the second threaded through hole 122 adjacent to the internal thread and extend into the second annular groove 211 adjacent to the external thread section 22, as shown in fig. 4.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the mode of directly coating thread glue on the connecting threads of the nut 1 and the connecting piece 2, the locking effect of the thread glue on large-size threads is poor, so that the connecting effect is poor, and the locking structure provided by the invention is not limited by the thread specification.
2. Compared with a double-nut locking mode which is not suitable for impact and alternating load working conditions, the locking structure belongs to mechanical anti-loosening, meets various complex working conditions, and improves connection reliability.
3. Compared with the traditional mode of matching and drilling radial holes on the radial set screw 3, the single radial hole can only be used for one time, and when the nut 1 is screwed in place again after being removed, the set screw 3 can not be inserted into the matched and drilled radial hole; the locking structure provided by the invention is provided with the annular groove 211, so that when the nut 1 is screwed in again, the set screw 3 can still be smoothly inserted into the annular groove 211, and the requirement of repeated use is met.
4. Compared with a mode of directly screwing the set screw 3 on the external thread, the set screw 3 usually extrudes the thread, and the thread is damaged after being disassembled for many times, so that the connection strength is influenced; the locking structure provided by the invention designs the fastening screw 3 and the thread connection on different axial sections, thereby avoiding the problem of damaging thread teeth.
5. The locking structure provided by the invention can adapt to the change of the quantity of the gaskets 5 positioned and locked between the support bearings 4 on the connecting piece 2.
6. The locking structure provided by the invention is convenient to mount and dismount, simple in structure, small in axial space occupation, easy to machine and manufacture and low in cost.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A single nut locking structure, characterized in that it comprises a nut (1), a coupling member (2) and a set screw (3);
the nut (1) comprises an internal thread section (11) and a hole section (12) which are connected along the axial direction, the thread diameter of the internal thread section (11) is larger than the aperture of the hole section (12), at least one plane (121) is arranged on the outer side of the hole section (12) along the circumferential direction, and a thread through hole (122) is formed in the plane (121);
the coupling (2) comprises a first shaft section (21), an external thread section (22), a second shaft section (23) and a third shaft section (24) which are sequentially connected along the axial direction, the thread diameter of the external thread section (22) is larger than that of the first shaft section (21) and smaller than that of the second shaft section (23), the diameter of the third shaft section (24) is larger than that of the second shaft section (23), the first shaft section (21) is provided with at least one annular groove (211) along the circumferential direction, and a locking part is sleeved on the second shaft section (23) of the coupling (2);
the nut (1) is sleeved on the first shaft section (21) and the external thread section (22) of the connecting piece (2), the internal thread section (11) is matched with the external thread section (22), and the hole section (12) is matched with the first shaft section (21);
after the nut (1) is screwed in place under the preset torque, the set screw (3) penetrates through the threaded through hole (122) and then extends into the annular groove (211) to lock the locked part.
2. The structure according to claim 1, characterized in that the number of the annular grooves (211) is plural, the number of the threaded through holes (122) is the same as the number of the annular grooves (211), the plurality of annular grooves (211) are arranged along the coupling member (2) at equal intervals in the axial direction, the plurality of threaded through holes (122) are arranged along the nut (1) at equal intervals in the axial direction, the difference between the axial interval between every two adjacent annular grooves (211) and the axial interval between every two adjacent threaded through holes (122) is equal to the minimum adjustment thickness of the spacer (5) between the locked components, and after the nut (1) is screwed into place at a preset torque, one of the annular grooves (211) is aligned with one of the threaded through holes (122).
3. Arrangement according to claim 2, characterized in that, in the case of only one shim (5) of minimum adjusted thickness being included between the locked parts, the first of the annular grooves (211) adjacent to the external threaded section (22) is aligned with the first of the threaded through holes (122) adjacent to the internal threaded section (11) after the nut (1) has been screwed into place at a preset torque.
4. A structure as claimed in claim 2 or 3, characterized in that each of said flat surfaces (121) is provided with one of said threaded through holes (122).
5. A structure according to any of claims 1-3, characterized in that the annular groove (211) is an annular V-groove.
6. A structure according to any one of claims 1-3, characterized in that a threaded glue is provided between the set screw (3) and the threaded through hole (122).
7. The structure of claim 6, wherein the thread compound is a non-removable thread compound.
8. A structure according to any one of claims 1-3, characterised in that the side of the internal thread section (11) adjacent to the bore section (12) is provided with an internal thread relief (111) and the side of the external thread section (22) adjacent to the second shaft section (23) is provided with an external thread relief (221).
9. Structure as claimed in any one of claims 1 to 3, characterized in that the effective threading length between said nut (1) and said coupling (2) is not less than 6 to 7 times the thread pitch.
10. A structure according to any one of claims 1-3, characterized in that the bore section (12) is a clearance fit with the first shaft section (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110747125.0A CN113483006B (en) | 2021-07-01 | 2021-07-01 | Single nut locking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110747125.0A CN113483006B (en) | 2021-07-01 | 2021-07-01 | Single nut locking structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113483006A true CN113483006A (en) | 2021-10-08 |
| CN113483006B CN113483006B (en) | 2023-02-10 |
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|---|---|---|---|
| CN202110747125.0A Active CN113483006B (en) | 2021-07-01 | 2021-07-01 | Single nut locking structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2360972A1 (en) * | 1973-12-07 | 1975-06-12 | Tos Kurim N P | Actuating screw nut adjusting mechanism - has bush accommodating nuts with threads of different pitches |
| KR101560737B1 (en) * | 2014-07-23 | 2015-10-15 | 황재필 | Locking bolt |
| CN110886761A (en) * | 2019-12-25 | 2020-03-17 | 安顺中安安装工程有限公司 | Screw thread anti-loosening device |
| CN210623363U (en) * | 2019-07-19 | 2020-05-26 | 中山市飞鹰五金标准件有限公司 | Split type plate bolt |
| CN213117067U (en) * | 2020-09-11 | 2021-05-04 | 深圳市永甚誉精密五金有限公司 | Adjustable anti-loosening reticulated screw |
-
2021
- 2021-07-01 CN CN202110747125.0A patent/CN113483006B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2360972A1 (en) * | 1973-12-07 | 1975-06-12 | Tos Kurim N P | Actuating screw nut adjusting mechanism - has bush accommodating nuts with threads of different pitches |
| KR101560737B1 (en) * | 2014-07-23 | 2015-10-15 | 황재필 | Locking bolt |
| CN210623363U (en) * | 2019-07-19 | 2020-05-26 | 中山市飞鹰五金标准件有限公司 | Split type plate bolt |
| CN110886761A (en) * | 2019-12-25 | 2020-03-17 | 安顺中安安装工程有限公司 | Screw thread anti-loosening device |
| CN213117067U (en) * | 2020-09-11 | 2021-05-04 | 深圳市永甚誉精密五金有限公司 | Adjustable anti-loosening reticulated screw |
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| Publication number | Publication date |
|---|---|
| CN113483006B (en) | 2023-02-10 |
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