CN109973500B - Locknut and using method thereof - Google Patents
Locknut and using method thereof Download PDFInfo
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- CN109973500B CN109973500B CN201910184770.9A CN201910184770A CN109973500B CN 109973500 B CN109973500 B CN 109973500B CN 201910184770 A CN201910184770 A CN 201910184770A CN 109973500 B CN109973500 B CN 109973500B
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- block
- wedge
- pressing block
- threaded shaft
- pressing
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- 238000000034 method Methods 0.000 title claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a locknut and a use method thereof, and the locknut comprises a nut body in threaded connection with a threaded shaft, wherein a wedge groove is arranged on one side of the nut body close to the threaded shaft, a wedge is arranged in the wedge groove, a pressing block groove is arranged on one side of the wedge groove, which is opposite to the threaded shaft, and a pressing block capable of moving along the radial direction of the nut body is arranged in the pressing block groove; one side of the wedge block is attached to the external thread on the threaded shaft, the other side of the wedge block is attached to the pressing block, the transverse width of the pressing block is larger than that of the wedge block, the thickness of one end, close to the screwing-out direction of the nut body, of the wedge block is larger than that of the other end of the wedge block, and a pressing mechanism used for driving the pressing block to apply pressing force to the wedge block is arranged between the nut body and the pressing block. The anti-loosening device has a good anti-loosening effect, can realize the anti-loosening effect only through one nut when in use, does not need to lengthen the threaded shaft, reduces the occupied space of the threaded shaft on equipment, and saves the cost.
Description
Technical Field
The invention relates to the technical field of nut looseness prevention, in particular to a looseness-prevention nut and a using method thereof.
Background
In the present apparatus, bolt connection is used in many places. In the long-time use process, the nut and the stud are easy to loosen, so that the connection is failed. The thread looseness prevention is a technical problem which must be solved for safety. The double-nut anti-loosening structure is a commonly used anti-loosening structure at present. For example, the invention discloses a self-locking double-nut anti-loosening fastening device which is disclosed as Chinese patent publication No. CN108194477A and comprises a forward and reverse double-thread bolt, a fastening nut, a limit nut and a spring washer, wherein the fastening nut is close to a fastening piece, and the spring washer is arranged between the limit nut and the fastening nut; the rotation directions of the threads of the fastening nut and the limiting nut are opposite, when the fastening nut is a right-handed thread, the limiting nut is a left-handed thread, and when the fastening nut is a left-handed thread, the limiting nut is a right-handed thread; a fastening nut limiting key is arranged on the side surface of the fastening nut close to the spring washer; a limit nut limiting key is arranged on the side surface of the limit nut close to the tight spring washer; the fastening nut limiting key and the limiting nut limiting key are respectively in contact fit with one end of the spring washer; when the fastening nut is a right-handed thread, the spring washer is a left-handed spring washer when the limiting nut is a left-handed thread, and when the fastening nut is a left-handed thread, the spring washer is a right-handed spring washer when the limiting nut is a right-handed thread. The invention has the following disadvantages: because the anti-loosening mode needs to use two nuts at the same time, enough arrangement space needs to be reserved on the bolt or the threaded shaft in advance, so that the bolt or the threaded shaft needs to be lengthened, the cost is increased, the occupied space of the bolt or the threaded shaft on equipment is increased, and the miniaturization of the equipment is not facilitated; secondly, the anti-loosening mechanism needs to use two nuts at the same time, the bolt must be provided with a positive and negative two-way thread, the anti-loosening effect can be achieved only by meeting the conditions, and the conventional bolt or threaded shaft does not have the conditions of the positive and negative two-way thread, so that the anti-loosening mode is difficult to apply to a common bolt or threaded shaft, and the application range is greatly limited.
Disclosure of Invention
The invention aims to solve the problems that when the existing double-nut anti-loose mechanism is used, two nuts are required to be used simultaneously, enough arrangement space needs to be reserved in advance on a bolt or a threaded shaft, the bolt or the threaded shaft needs to be lengthened, the cost is increased, and the occupied space of the bolt or the threaded shaft on equipment is increased.
The purpose of the invention is realized by the following technical scheme: a locknut comprises a nut body in threaded connection with a threaded shaft, wherein a wedge groove is formed in one side, close to the threaded shaft, of the nut body, a wedge is arranged in the wedge groove, a pressing block groove is formed in one side, opposite to the threaded shaft, of the wedge groove, and a pressing block capable of moving along the radial direction of the nut body is arranged in the pressing block groove; one side of the wedge block is attached to the external thread on the threaded shaft, the other side of the wedge block is attached to the pressing block, the transverse width of the pressing block is larger than that of the wedge block, the thickness of one end, close to the screwing-out direction of the nut body, of the wedge block is larger than that of the other end of the wedge block, and the friction force when the wedge block is in contact with the pressing block is smaller than that when the wedge block is in contact with the threaded shaft; and a connection control mechanism for controlling the connection or disconnection of the pressing block and the wedge block is arranged between the pressing block and the wedge block, and a pressing mechanism for driving the pressing block to apply pressing force on the wedge block is arranged between the nut body and the pressing block.
In the invention, the aim of preventing the nut from loosening is fulfilled by using the wedge block. When the nut body is screwed into the threaded shaft, the wedge block is connected with the pressing block through the connection control mechanism, and therefore when the nut body is screwed into the threaded shaft, the wedge block can move synchronously with the nut body. When the nut body is screwed, the wedge block is disconnected from the pressing block through the connection control mechanism, then the pressing mechanism is used for applying pressing force to the wedge block, so that the wedge block is tightly attached to the side face of the threaded shaft, and the nut body and the threaded shaft are in a locking state. The wedge block arranged between the wedge block groove and the threaded shaft can wedge the nut body on the threaded shaft. When the nut body is in a locking state, the friction force generated when the wedge block is in contact with the pressing block is smaller than the friction force generated when the wedge block is in contact with the threaded shaft, so that the wedge block and the threaded shaft are relatively fixed, and the pressing block and the wedge block are relatively rotated; because be close to the thickness that nut body screwed out direction one end thickness is greater than the other end on the voussoir, when the nut body was rotatory toward the orientation of unscrewing like this, because the nut body can move toward the great one end of voussoir thickness, the voussoir just can be with nut body wedging, the not hard up of restriction nut body to locking effect has been played. When the nut needs to be disassembled, the pressing mechanism is only needed to be adjusted, the wedge block and the pressing block are loosened, and the nut body can be normally screwed out from the threaded shaft. When the anti-loosening device is used, the anti-loosening effect can be realized only through one nut, the threaded shaft does not need to be lengthened, the occupied space of the threaded shaft on equipment is reduced, and the cost is saved. Compared with the traditional double-nut anti-loosening mechanism, the double-nut anti-loosening mechanism does not need to be provided with the positive and negative two-way threads on the threaded shaft or the bolt, can be applied to common bolts or threaded shafts, and has wider application range.
Preferably, the transverse section of the briquette is circular arc.
Preferably, a fitting layer that can be fitted to the male screw on the threaded shaft is provided on the wedge on the side closer to the threaded shaft. The embedded layer can be embedded into the external thread on the threaded shaft under the action of pressure, the attaching degree of the wedge block and the side face of the threaded shaft is improved in a thread embedding mode, and the friction force between the wedge block and the threaded shaft is increased.
Preferably, the fitting layer is made of rubber or brass. The rubber or brass material is softer, can imbed effectively in the screw thread for the laminating degree with the screw thread is better.
Preferably, the connection control mechanism comprises a first threaded hole formed in the pressing block, a second threaded hole corresponding to the first threaded hole is formed in one side, close to the pressing block, of the wedge block, a connection screw is connected to the first threaded hole in a threaded mode, the front end of the connection screw extends into the second threaded hole when the pressing block and the wedge block are in a connection state, and one end, far away from the pressing block, of the connection screw penetrates through the nut body and extends to the outer side of the nut body. The connecting screw is rotated to enable the front end of the connecting screw to be screwed into the second threaded hole, so that the wedge block is convenient for pressing block connection; and the connecting screw is rotated reversely, so that the front end of the connecting screw is screwed out of the second threaded hole, and the wedge block is convenient for the pressing block to be disconnected.
Preferably, the pressing mechanism comprises a pressing screw in threaded connection with the nut body, the pressing screw is arranged along the moving direction of the pressing block, the front end of the pressing screw is abutted to the pressing block, and the other end of the pressing screw extends to the outer side of the nut body. The pressing mechanism enables the pressing screw to move axially by rotating the pressing screw, and pushes the pressing block to move, so that the pressing block pushes the wedge block and the wedge block is tightly pressed with the threaded shaft.
A use method of a locknut comprises the following specific steps:
1) rotating the connecting screw, screwing the front end of the connecting screw into a second threaded hole on the wedge block, and connecting the wedge block with the pressing block;
2) screwing the nut body into the threaded shaft and screwing;
3) rotating the connecting screw, and screwing out the front end of the connecting screw from the second threaded hole to disconnect the wedge block from the pressing block;
4) and rotating the compression screw to compress the wedge block and the threaded shaft.
In the step 1), the front end of the connecting screw is screwed into a second threaded hole on the wedge block, and the wedge block is connected with the wedge block, so that the wedge block can move together with the nut body when the nut body is screwed into the threaded shaft. And 4) rotating the compression screw to compress the wedge block and the threaded shaft, wherein after the wedge block is compressed, the embedded layer at the front end of the wedge block can be embedded into the external thread of the threaded shaft under the action of pressure, and the wedge block tightly wedges the nut body and the threaded shaft, so that the anti-loosening effect is achieved.
The invention has the beneficial effects that: when the anti-loosening device is used, the anti-loosening effect can be realized only through one nut, the threaded shaft does not need to be lengthened, the occupied space of the threaded shaft on equipment is reduced, and the cost is saved. Compared with the traditional double-nut anti-loosening mechanism, the double-nut anti-loosening mechanism does not need to be provided with the positive and negative two-way threads on the threaded shaft or the bolt, can be applied to common bolts or threaded shafts, and has wider application range.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the present invention in connection with a threaded shaft.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is an enlarged view of a portion a of fig. 3.
Fig. 5 is a sectional view taken in the direction B-B in fig. 2.
In the figure: 1. the nut comprises a nut body, 2, wedge grooves, 3, pressing blocks, 4, wedges, 5, connecting screws, 6, compression screws, 7, threaded shafts, 8, an embedded layer, 9, pressing block grooves, 10, first threaded holes, 11, second threaded holes, 12 and through holes.
Detailed Description
The invention is further described by the following detailed description in conjunction with the accompanying drawings.
Example (b): as shown in fig. 1 to 5, a locknut includes a nut body 1 screwed with a threaded shaft 7. The nut body 1 is provided with an internal thread matched with the threaded shaft 7. One side of the nut body 1 close to the threaded shaft 7 is provided with a wedge groove 2. The transverse section of the wedge block groove 2 is arc-shaped. A wedge 4 is arranged in the wedge groove 2. And a block pressing groove 9 is formed in one side, opposite to the threaded shaft 7, of the wedge groove 2. The opening of the pressing block groove 9 is opposite to the threaded shaft 7. The pressing block groove 9 is provided with a pressing block 3 which can move along the radial direction of the nut body 1. The briquetting 3 is matched with the briquetting groove 9. The transverse section of the pressing block 3 is circular arc. One side of the wedge block 4 close to the threaded shaft 7 is attached to the external thread on the threaded shaft 7, and the other side of the wedge block 4 is attached to the pressing block 3. The transverse width of the pressing block 3 is larger than that of the wedge block 4, and the thickness of one end, close to the screwing-out direction of the nut body 1, of the wedge block 4 is larger than that of the other end of the wedge block. The friction force when the wedge 4 contacts the pressing block 3 is smaller than the friction force when the wedge 4 contacts the threaded shaft 7. The wedge 4 is provided with a fitting layer 8 on a side close to the threaded shaft 7, which is capable of fitting with the external thread on the threaded shaft 7. In the present embodiment, the fitting layer 8 is made of rubber or brass.
A connection control mechanism for controlling the connection or disconnection of the pressing block 3 and the wedge block 4 is arranged between the pressing block 3 and the wedge block 4. The connection control mechanism comprises a first threaded hole arranged on the pressing block 3. A second threaded hole 11 corresponding to the first threaded hole 10 is formed in one side, close to the pressing block 3, of the wedge block 4. The first threaded hole 10 is threadedly connected with a connection screw 5. The end of the connecting screw 5 remote from the wedge 4 extends outside the nut body 1 through a through hole 12 provided in the threaded body 1. When the pressing block 3 and the wedge block 4 are in a connection state, the front end of the connecting screw 5 is screwed into the second threaded hole. When the connecting screw is screwed out of the second threaded hole, the pressing block 3 is disconnected from the wedge block 4.
A pressing mechanism is arranged between the nut body 1 and the pressing block 3. The pressing mechanism is used for pushing the pressing block 3 to move and applying pressing force to the wedge block 4 through the pressing block 3. The pressing mechanism comprises a pressing screw 6 which is in threaded connection with the nut body 1. In this embodiment, two compression screws 6 are provided, and are respectively located at two ends of the pressing block. The compression screw 6 is provided along the moving direction of the pressing block 3. The front end of the compression screw 6 is abutted against the pressing block 3. The other end of the compression screw 6 extends to the outside of the nut body 1. The pressing mechanism enables the pressing screw to move axially by rotating the pressing screw, and pushes the pressing block to move, so that the pressing block pushes the wedge block and the wedge block is pressed with the threaded shaft.
When in use, the invention comprises the following specific steps: 1) rotating the connecting screw 5, screwing the front end of the connecting screw 5 into a second threaded hole 11 on the wedge block 4, and connecting the wedge block 4 with the pressing block 3; 2) screwing the nut body 1 into the threaded shaft 7 and screwing; 3) rotating the connecting screw 5, and screwing the front end of the connecting screw 5 out of the second threaded hole 11 to disconnect the wedge block 4 from the pressing block 3; 4) the compression screw 6 is rotated to compress the wedge 4 against the threaded shaft 7.
In the invention, the aim of preventing the nut from loosening is fulfilled by using the wedge block. When the nut body is screwed into the threaded shaft, the wedge block is connected with the pressing block through the connection control mechanism, and therefore when the nut body is screwed into the threaded shaft, the wedge block can move synchronously with the nut body. When the nut body is screwed, the wedge block is disconnected from the pressing block through the connection control mechanism, then the pressing mechanism is used for applying pressing force to the wedge block, so that the wedge block is tightly attached to the side face of the threaded shaft, and the nut body and the threaded shaft are in a locking state. The wedge block arranged between the wedge block groove and the threaded shaft can wedge the nut body on the threaded shaft. When the nut body is in a locking state, the friction force generated when the wedge block is in contact with the pressing block is smaller than the friction force generated when the wedge block is in contact with the threaded shaft, so that the wedge block and the threaded shaft are relatively fixed, and the pressing block and the wedge block are relatively rotated; because be close to the thickness that nut body screwed out direction one end thickness is greater than the other end on the voussoir, when the nut body was rotatory toward the orientation of unscrewing like this, because the nut body can move toward the great one end of voussoir thickness, the voussoir just can be with nut body wedging, the not hard up of restriction nut body to locking effect has been played. When the nut needs to be disassembled, the pressing mechanism is only needed to be adjusted, the wedge block and the pressing block are loosened, and the nut body can be normally screwed out from the threaded shaft. When the anti-loosening device is used, the anti-loosening effect can be realized only through one nut, the threaded shaft does not need to be lengthened, the occupied space of the threaded shaft on equipment is reduced, and the cost is saved. Compared with the traditional double-nut anti-loosening mechanism, the double-nut anti-loosening mechanism does not need to be provided with the positive and negative two-way threads on the threaded shaft or the bolt, can be applied to common bolts or threaded shafts, and has wider application range.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a locknut, includes nut body (1) with threaded shaft (7) threaded connection, its characterized in that: a wedge groove (2) is formed in one side, close to the threaded shaft (7), of the nut body (1), a wedge (4) is arranged in the wedge groove (2), a pressing block groove (9) is formed in one side, opposite to the threaded shaft (7), of the wedge groove (2), and a pressing block (3) capable of moving along the radial direction of the nut body (1) is arranged in the pressing block groove (9); one side of the wedge block (4) is attached to an external thread on the threaded shaft (7), the other side of the wedge block (4) is attached to the pressing block (3), the transverse width of the pressing block (3) is larger than that of the wedge block (4), the thickness of one end, close to the screwing-out direction of the nut body (1), of the wedge block (4) is larger than that of the other end of the wedge block, and the friction force when the wedge block (4) is in contact with the pressing block (3) is smaller than that when the wedge block (4) is in contact with the threaded shaft (7); a connection control mechanism used for controlling the connection or disconnection between the pressing block (3) and the wedge block (4) is arranged between the pressing block (3) and the wedge block (4), and a pressing mechanism used for driving the pressing block (3) to apply pressing force on the wedge block (4) is arranged between the nut body (1) and the pressing block (3).
2. Locknut according to claim 1, characterized in that the transverse cross-section of the pressing piece (3) is circular arc-shaped.
3. Locknut according to claim 1, characterized in that the wedge (4) is provided with a fitting layer (8) on the side close to the threaded shaft (7) for fitting with the external thread on the threaded shaft (7).
4. A locknut according to claim 3, characterized in that said interfitting layer (8) is made of rubber or brass.
5. The locknut of claim 1, 2, 3 or 4, wherein the connection control mechanism comprises a first threaded hole (10) arranged on the pressing block (3), a second threaded hole (11) corresponding to the first threaded hole (10) is arranged on one side, close to the pressing block (3), of the wedge block (4), a connecting screw (5) is connected in the first threaded hole (10) in a threaded manner, the front end of the connecting screw (5) extends into the second threaded hole (11) when the pressing block (3) and the wedge block (4) are in a connected state, and one end, away from the wedge block (4), of the connecting screw (5) penetrates through the nut body (1) and extends to the outer side of the nut body (1).
6. The locknut of claim 1, 2, 3 or 4, wherein the compression mechanism comprises a compression screw (6) which is screwed on the nut body (1), the compression screw (6) is arranged along the moving direction of the pressing block (3), the front end of the compression screw (6) is abutted against the pressing block (3), and the other end of the compression screw (6) extends to the outer side of the nut body (1).
7. The use method of the locknut as claimed in any one of claims 1 to 6, characterized by comprising the following specific steps:
1) the connecting screw (5) is rotated, the front end of the connecting screw (5) is screwed into a second threaded hole (11) on the wedge block (4), and the wedge block (4) is connected with the pressing block (3);
2) screwing the nut body (1) into the threaded shaft (7) and screwing;
3) rotating the connecting screw (5), and screwing the front end of the connecting screw (5) out of the second threaded hole (11) to disconnect the wedge block (4) from the pressing block (3);
4) and rotating the compression screw (6) to compress the wedge block (4) and the threaded shaft (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184770.9A CN109973500B (en) | 2019-03-12 | 2019-03-12 | Locknut and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184770.9A CN109973500B (en) | 2019-03-12 | 2019-03-12 | Locknut and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973500A CN109973500A (en) | 2019-07-05 |
| CN109973500B true CN109973500B (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910184770.9A Active CN109973500B (en) | 2019-03-12 | 2019-03-12 | Locknut and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN109973500B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630619A (en) * | 2019-10-21 | 2019-12-31 | 杜建龙 | Anti-loose combined fastener with precise structure |
| CN115076207B (en) * | 2022-08-22 | 2023-01-10 | 广东电网有限责任公司肇庆供电局 | Self-locking nut |
| CN116007891B (en) * | 2023-03-24 | 2023-05-30 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Locking connection device of wind tunnel balance support rod |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994007041A1 (en) * | 1992-09-11 | 1994-03-31 | Norman Leslie Matthews | Self-locking nut assembly |
| CN201455840U (en) * | 2009-06-09 | 2010-05-12 | 衡阳风顺车桥有限公司 | Clamping driving plate for shaft with threads at two ends |
| CN203532471U (en) * | 2013-09-25 | 2014-04-09 | 广州市昊志机电股份有限公司 | Locking nut |
| CN103643872B (en) * | 2013-12-11 | 2015-05-06 | 中国建筑标准设计研究院 | Novel track sealing device |
| CN204277895U (en) * | 2014-11-05 | 2015-04-22 | 中国人民解放军第二炮兵工程大学 | A kind of studs quick despatch instrument |
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2019
- 2019-03-12 CN CN201910184770.9A patent/CN109973500B/en active Active
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| CN109973500A (en) | 2019-07-05 |
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