CN114183453A - Interlocking type bolt anti-loosening structure - Google Patents
Interlocking type bolt anti-loosening structure Download PDFInfo
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- CN114183453A CN114183453A CN202111545283.4A CN202111545283A CN114183453A CN 114183453 A CN114183453 A CN 114183453A CN 202111545283 A CN202111545283 A CN 202111545283A CN 114183453 A CN114183453 A CN 114183453A
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- loosening
- bolt
- ring
- teeth
- elastic
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- 230000002265 prevention Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 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
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
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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
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention provides an interlocking bolt anti-loosening structure which comprises a bolt, an elastic anti-loosening ring and a loosening-preventing seat, wherein the elastic loosening-preventing ring is clamped between the bolt head and the loosening-preventing seat, the elastic loosening-preventing ring comprises an opening backing ring main body, two side faces of the backing ring main body are respectively provided with loosening-preventing teeth with the same guiding and non-returning directions, the upper end face of the loosening-preventing seat is provided with a circle of loosening-preventing teeth, the bottom of the loosening-preventing seat is fixedly connected with a workpiece mounting hole, and the bottom of the bolt head is provided with the loosening-preventing teeth. After being screwed, the bolt head, the elastic anti-loosening ring and the anti-loosening seat are mutually meshed to form an interlocking structure. When the bolt circles round, the anti-loosening teeth need to overcome the resistance of the anti-loosening surface on the elastic anti-loosening ring, when the gradient of the anti-loosening surface is smaller than 90 degrees and larger than a critical angle, the resistance of the anti-loosening surface on the elastic anti-loosening ring cannot be overcome by the loosening force when the bolt circles round, so that the anti-loosening teeth cannot be crossed, and the non-return and anti-loosening are realized. When the anti-loosening gear is disassembled, only the disassembling force larger than the resistance of the anti-loosening gear is needed to be provided, and the anti-loosening gear can be disassembled without damage. When the slope of the anti-loosening surface is equal to or greater than 90 degrees, the structure is locked, and the anti-theft effect is achieved.
Description
Technical Field
The invention relates to a locking mechanism, in particular to an interlocking bolt locking structure which can effectively prevent a threaded connection assembly from loosening.
Background
Bolt looseness is a problem which has long plagued the field of machinery. Under static load, the friction force generated between the thread pairs has self-locking capacity, and the bolt cannot be loosened; however, under the vibration condition, the friction force between the thread pairs disappears instantly, and the thread pairs are loosened and rotated.
Disclosure of Invention
The invention provides an interlocking bolt anti-loosening structure, aiming at solving the problem of loosening of a bolt connecting piece, in particular to the problem of fastening and loosening prevention of a bolt under a nut-free working condition (usually a counter bore or a blind hole).
The invention conception is as follows: an elastic anti-loosening ring is arranged between a bolt and a hole of an anti-loosening seat, anti-loosening teeth are arranged on two sides of the elastic anti-loosening ring, corresponding anti-loosening teeth are arranged on a part which is in contact with the elastic anti-loosening ring, the anti-loosening seat is fixed on a workpiece, when the bolt needs to be loosened and rotated, the anti-loosening teeth on the anti-loosening seat must cross the anti-loosening teeth on the elastic anti-loosening ring, and when the angular gradient (beta angle) of the anti-loosening surface of each anti-loosening tooth is proper, the resistance generated along the anti-loosening surface is larger than the force of the loosening and rotation, so that the loosening and rotation of the bolt is effectively prevented; for the situation needing to be disassembled, the critical angle theta is more than beta and less than 90 degrees, thereby realizing non-destructive disassembly; when the anti-theft lock is used for preventing theft, the beta angle is 90 degrees or more than 90 degrees, and the anti-loosening structure is locked.
Therefore, the technical scheme of the invention is that the interlocking bolt anti-loosening structure is used for fastening and loosening prevention of a bolt under a nut-free working condition, comprises the bolt and is characterized in that: also comprises an elastic anti-loosening ring and a loosening-proof seat, the elastic loosening-proof ring is clamped between the bolt head and the loosening-proof seat,
the elastic anti-loosening ring comprises a backing ring main body, the backing ring main body is in a spiral ring shape, the head and the tail are different in height and staggered up and down to form an elastic opening, anti-loosening teeth which are arranged in the radial direction are uniformly distributed on two side faces of the backing ring main body in a whole circle respectively, one side of each anti-loosening tooth is a guide face, the other side of each anti-loosening tooth is an anti-loosening face, the upward slope tangential direction of the guide face of the anti-loosening tooth close to one side of a bolt head is consistent with the bolt screwing direction, the upward slope tangential direction of the anti-loosening face of the anti-loosening tooth close to one side of an anti-loosening seat corresponds to the bolt non-return direction, and the guide and non-return directions of the anti-loosening teeth on two sides of the backing ring main body are consistent;
the middle of the anti-loosening seat is provided with a through hole for a bolt to pass through, the upper end surface of the anti-loosening seat is provided with a circle of anti-loosening teeth meshed with the anti-loosening teeth on the elastic anti-loosening ring, the periphery of the anti-loosening teeth is reserved with a bearing surface, and the bottom of the anti-loosening seat is provided with an installation part fixedly connected with the workpiece installation hole;
the bottom of the bolt head is provided with a circle of anti-loosening teeth meshed with the anti-loosening teeth on the elastic anti-loosening ring, and a bearing surface is reserved on the periphery of the anti-loosening teeth;
when the locking bolt is fastened, the locking teeth on the two sides of the elastic locking ring are meshed with the locking teeth on the bolt head and the locking seat, and the bolt head, the elastic locking ring and the locking seat form an interlocking structure.
Preferably, the cross sections of the bolt head, the locking seat and the locking teeth on the elastic locking ring are the same, and the cross section is triangular, semicircular, trapezoidal or arc-shaped, wherein: the slope of the guide surface is greater than the thread lead angle, the slope of the anti-loosening surface is less than 90 degrees and greater than the critical angle when the anti-loosening surface is detachable, and the slope of the anti-loosening surface is greater than or equal to 90 degrees when the anti-loosening surface is not detachable.
The technical scheme is further improved as follows: when the anti-loosening structure is used, the anti-loosening seat is coaxially fixed on a mounting hole of a workpiece, the elastic anti-loosening ring is assembled on the anti-loosening seat, the anti-loosening teeth are meshed with each other, after a bolt is screwed into the threaded hole and is screwed down, the anti-loosening teeth on the bolt head are meshed with the anti-loosening teeth on the elastic anti-loosening ring and compress the elastic anti-loosening ring, meanwhile, the bolt head is in contact with the bearing surface on the anti-loosening seat, pretightening force is transmitted, the bolt head, the elastic anti-loosening ring and the anti-loosening seat form an interlocking structure, the anti-loosening face on the anti-loosening seat exerts resistance on the elastic anti-loosening ring and transmits the resistance to the anti-loosening face on the bolt head, the resistance is greater than the loosening and circling force of the bolt, relative sliding cannot be generated between the anti-loosening teeth due to vibration, and the interlocking structure can stably prevent loosening.
Has the advantages that: the anti-loosening structure provided by the invention solves the anti-loosening problem of the bolt in the threaded hole, is good in detachability and can be repeatedly used.
Drawings
FIG. 1 is a schematic view of the anti-loose assembly of blind bolts on a workpiece according to the invention.
FIG. 2 is a schematic view of the anti-loosening assembly of a countersunk bolt for a workpiece according to the invention.
FIG. 3 is a detailed view of the meshing relationship of the anti-loosening teeth in the anti-loosening assembly of the counter bore or blind bolt of the present invention.
Fig. 4 is a structural view of a counterbore bolt (hexagon socket head) of the present invention.
Fig. 5 is a cross-sectional view of fig. 4.
Fig. 6 is an isometric view of the resilient anti-loosening ring of the present invention.
FIG. 7 is a front view of the elastic anti-loosening ring of the present invention
Fig. 8 is a side view of the resilient anti-loosening ring of the present invention.
Fig. 9 is an isometric view of a check seat of the present invention.
Fig. 10 is a front view of the check seat of the present invention.
Shown in the figure: 10. a bolt; 20. an elastic anti-loosening ring; 30. a locking seat; 40. a workpiece; 50. a workpiece; f1, a guide surface; f2, anti-loosening face.
Detailed Description
The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings.
It should be noted that:
the critical angle theta is the minimum gradient or angle required by the anti-loosening surfaces of the anti-loosening teeth which cannot slide relative to each other due to the resistance between the anti-loosening surfaces when the anti-loosening teeth are loosened and rotated due to vibration;
the uphill tangential direction refers to the direction from the root of the anti-loosening tooth to the top of the tooth;
the slope refers to an included angle between an uphill tangent of a point on the guide surface or the anti-loosening surface and a plane perpendicular to the central axis;
the lead angle of the elastic anti-loosening ring is greater than that of a thread of the same direction of rotation, and the lead angle have the same specifications as those of the thread in the machine.
The invention is shown in fig. 1 to 10:
an interlocking bolt anti-loosening structure is used for fastening and loosening prevention of a bolt under a nut-free working condition and comprises a bolt 10, an elastic loosening-preventing ring 20 and a loosening-preventing seat 30, wherein the bolt 10 penetrates through a through hole in the middle of the elastic loosening-preventing ring 20 and the loosening-preventing seat 30, the elastic loosening-preventing ring is clamped between the bolt head and the loosening-preventing seat of the bolt,
the elastic anti-loosening ring 20 comprises a backing ring main body, the backing ring main body is in a spiral ring shape, the head and the tail are different in height and staggered up and down to form an elastic opening, anti-loosening teeth 21 which are arranged in the radial direction are uniformly distributed on two side faces of the backing ring main body in a whole circle respectively, one side of each anti-loosening tooth is a guide surface F1, the other side of each anti-loosening tooth is an anti-loosening surface F2, the ascending tangential direction of the guide surface of the anti-loosening tooth close to one side of a bolt head is consistent with the screwing direction of the bolt 10, the ascending tangential direction of the anti-loosening surface of the anti-loosening tooth close to one side of the anti-loosening seat 30 is corresponding to the non-return direction of the bolt, and the guiding and non-return directions of the anti-loosening teeth on two sides of the backing ring main body are consistent;
the middle of the anti-loosening seat 30 is provided with a through hole for a bolt to pass through, the upper end surface of the anti-loosening seat is provided with a circle of anti-loosening teeth 31 which are meshed with the anti-loosening teeth on the elastic anti-loosening ring, the periphery of the anti-loosening teeth is reserved with a bearing surface 32, the bottom of the anti-loosening seat is provided with a mounting part 33 which is fixedly connected with the mounting hole of the workpiece,
the bottom of the bolt head is provided with a circle of anti-loosening teeth 11 meshed with the anti-loosening teeth on the elastic anti-loosening ring, and a bearing surface 12 is reserved on the periphery of the anti-loosening teeth;
when fastening, the locking teeth on both sides of the elastic anti-loosening ring 20 are meshed with the locking teeth on the bolt head and the locking seat 30, and the bolt head, the elastic anti-loosening ring and the locking seat form an interlocking structure.
The cross sections of the bolt head, the anti-loosening seat 30 and the anti-loosening teeth on the elastic anti-loosening ring 20 of the bolt 10 are the same, and the cross section is triangular or semicircular or trapezoidal or arc-shaped, wherein: the slope of the guide surface F1 is greater than the thread lead angle, the slope for the anti-loosening surface when removable is less than 90 ° and greater than the critical angle, and the slope for the anti-loosening surface when non-removable is greater than or equal to 90 °.
When the anti-loosening device is used, the anti-loosening seat 30 is coaxially fixed on a mounting hole of a workpiece 40 through welding or integrated forming, the elastic anti-loosening ring 20 is assembled on the anti-loosening seat 30, the anti-loosening teeth are meshed with each other, the bolt 10 sequentially penetrates through the elastic anti-loosening ring, the anti-loosening seat and the mounting hole of the workpiece 40 and then is screwed into a threaded hole of the workpiece 50, after the bolt is screwed down, the anti-loosening teeth 11 on the bolt head are meshed with the anti-loosening teeth 21 on the elastic anti-loosening ring and compress the elastic anti-loosening ring, meanwhile, the bolt head is in contact with a bearing surface on the anti-loosening seat, and pretightening force is applied to the workpiece.
When the vibration causes the bolt to loosen and rotate, the resistance of the anti-loosening surface of the anti-loosening teeth 21 of the elastic anti-loosening ring needs to be overcome, and the elastic anti-loosening ring needs to be pressed downwards. When the gradient beta of the anti-loosening surface is larger than the critical angle theta, the resistance of the anti-loosening teeth on the elastic anti-loosening ring cannot be overcome by the loosening and circling force of the bolt, so that the anti-loosening teeth of the elastic anti-loosening ring cannot be pressed downwards, finally, the anti-loosening teeth 11 on the bolt head cannot cross the anti-loosening teeth 21 on the elastic anti-loosening ring, and the bolt head, the elastic anti-loosening ring and the anti-loosening seat are always in an interlocking state. Since the anti-loosening seat 30 is fixed on the workpiece, loosening is not generated, and therefore the whole interlocking structure cannot be loosened, and the effect of preventing the bolt from loosening is achieved. When the anti-loosening gear is disassembled, the disassembly can be realized by applying force larger than the resistance of the anti-loosening gear.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The utility model provides an interlocking formula bolt anti loosening structure for the fastening and the locking of bolt under the no nut operating mode, including the bolt, its characterized in that: also comprises an elastic anti-loosening ring and a loosening-proof seat, the elastic loosening-proof ring is clamped between the bolt head and the loosening-proof seat,
the elastic anti-loosening ring comprises a backing ring main body, the backing ring main body is in a spiral ring shape, the head and the tail are different in height and staggered up and down to form an elastic opening, anti-loosening teeth which are arranged in the radial direction are uniformly distributed on two side faces of the backing ring main body in a whole circle respectively, one side of each anti-loosening tooth is a guide face, the other side of each anti-loosening tooth is an anti-loosening face, the upward slope tangential direction of the guide face of the anti-loosening tooth close to one side of a bolt head is consistent with the bolt screwing direction, the upward slope tangential direction of the anti-loosening face of the anti-loosening tooth close to one side of an anti-loosening seat corresponds to the bolt non-return direction, and the guide and non-return directions of the anti-loosening teeth on two sides of the backing ring main body are consistent;
the middle of the anti-loosening seat is provided with a through hole for a bolt to pass through, the upper end surface of the anti-loosening seat is provided with a circle of anti-loosening teeth meshed with the anti-loosening teeth on the elastic anti-loosening ring, the periphery of the anti-loosening teeth is reserved with a bearing surface, and the bottom of the anti-loosening seat is provided with an installation part fixedly connected with the workpiece installation hole;
the bottom of the bolt head is provided with a circle of anti-loosening teeth meshed with the anti-loosening teeth on the elastic anti-loosening ring, and a bearing surface is reserved on the periphery of the anti-loosening teeth.
2. The interlocking bolt looseness prevention structure of claim 1, wherein: the cross-section of the bolt head, the cross-section of the anti-loosening teeth on the anti-loosening seat and the elastic anti-loosening ring are triangular or semicircular or trapezoidal or arc-shaped, wherein: the slope of the guide surface is greater than the thread lead angle, the slope of the anti-loosening surface is less than 90 degrees and greater than the critical angle when the anti-loosening surface is detachable, and the slope of the anti-loosening surface is greater than or equal to 90 degrees when the anti-loosening surface is not detachable.
3. An interlocking bolt looseness prevention structure according to claim 1 or 2, wherein: when the anti-loosening structure is used, the anti-loosening seat is coaxially fixed on a mounting hole of a workpiece, the elastic anti-loosening ring is assembled on the anti-loosening seat, the anti-loosening teeth are meshed with each other, after a bolt is screwed into the threaded hole and is screwed down, the anti-loosening teeth on the bolt head are meshed with the anti-loosening teeth on the elastic anti-loosening ring and compress the elastic anti-loosening ring, meanwhile, the bolt head is in contact with the bearing surface on the anti-loosening seat, pretightening force is transmitted, the bolt head, the elastic anti-loosening ring and the anti-loosening seat form an interlocking structure, the anti-loosening face on the anti-loosening seat exerts resistance on the elastic anti-loosening ring and transmits the resistance to the anti-loosening face on the bolt head, the resistance is greater than the loosening and circling force of the bolt, relative sliding cannot be generated between the anti-loosening teeth due to vibration, and the interlocking structure can stably prevent loosening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545283.4A CN114183453A (en) | 2021-12-17 | 2021-12-17 | Interlocking type bolt anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545283.4A CN114183453A (en) | 2021-12-17 | 2021-12-17 | Interlocking type bolt anti-loosening structure |
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| Publication Number | Publication Date |
|---|---|
| CN114183453A true CN114183453A (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111545283.4A Pending CN114183453A (en) | 2021-12-17 | 2021-12-17 | Interlocking type bolt anti-loosening structure |
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| CN (1) | CN114183453A (en) |
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| CN105134745A (en) * | 2015-10-19 | 2015-12-09 | 上海格姆特紧固技术有限公司 | Double-layer dish tooth surface combination gasket |
| CN106321602A (en) * | 2016-07-07 | 2017-01-11 | 中国第汽车股份有限公司 | Lock washer |
| CN207333426U (en) * | 2017-10-30 | 2018-05-08 | 嘉兴南洋职业技术学院 | A kind of locking connector on electromechanical equipment |
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| US20190234447A1 (en) * | 2018-01-30 | 2019-08-01 | Unitech Products Corp. | Two-piece anti-loosening nut assembly |
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