CN112555255A - Single-face fastening bolt - Google Patents
Single-face fastening bolt Download PDFInfo
- Publication number
- CN112555255A CN112555255A CN201910918434.2A CN201910918434A CN112555255A CN 112555255 A CN112555255 A CN 112555255A CN 201910918434 A CN201910918434 A CN 201910918434A CN 112555255 A CN112555255 A CN 112555255A
- Authority
- CN
- China
- Prior art keywords
- radial
- screw rod
- nut
- fastening bolt
- limiting sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000009471 action Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 9
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a single-face fastening bolt which comprises a screw rod, a limiting sleeve and a nut, wherein one end of the screw rod penetrates through the limiting sleeve to be in threaded fit with the nut, the screw rod and the limiting sleeve do not rotate relatively, one end of the limiting sleeve is provided with a radial limiting part, the other end of the limiting sleeve is provided with a plurality of anti-rotation grooves along the circumferential direction, the anti-rotation grooves are provided with openings, the openings face away from the radial limiting part, one end of the nut is provided with a plurality of locking teeth along the circumferential direction, the locking teeth correspond to the anti-rotation grooves one by one, the locking teeth can be inserted into the anti-rotation grooves, radial grooves are formed in the locking teeth, and radial protrusions capable of being matched with each radial. The nut is moved under the action of a thread force by rotating the screw rod so as to press a fastened piece, and the lock teeth are spread under the action of the radial protrusion of the screw rod in the moving process of the nut so that the nut presses the fastened piece.
Description
Technical Field
The invention relates to a fastening device, in particular to a single-sided fastening bolt.
Background
Bolts are the most commonly used fasteners and are used in a wide variety of product applications. The fastening method is usually that the bolt is fixed by a spanner on one side of the fastened piece, and the bolt is fixed by a spanner knob nut on the other side by thread engagement to move up and down to press the fastened piece, or vice versa. The bolt fastening generally needs enough space on both sides of a fastened piece to extend into a wrench for operation, and a plurality of bolts are located in the condition that the fastened piece generally has an operation space and the other half is shielded and cannot be operated in the assembling process or the product overhauling process. In order to avoid the problem of space occupation in disassembly and locking, structural optimization is often required or a nut is welded on the side shielded by a fastener, but the whole product is scrapped due to the fact that the thread of the nut is damaged even if the nut is welded, and a large amount of manpower is wasted. Moreover, the bolts cause maintenance troubles for products, and generally, the products are assembled in sequence without problems, but when a certain component is broken down and needs to be disassembled, because the bolts are shielded by the adjacent components, the adjacent components without faults have to be disassembled first, and then the broken components are disassembled.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a single-sided fastening bolt which can realize the fastening function under the condition that certain single side is shielded or the single-sided space is limited.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a single face fastening bolt, includes screw rod, stop collar and nut, screw rod one end is passed stop collar and nut screw-thread fit, no relative rotation between screw rod and the stop collar, the one end of stop collar is equipped with radial spacing portion, and the other end is equipped with a plurality of groove that splines along the circumferencial direction, the groove that splines has the opening, and the opening dorsad radial spacing portion, the nut is equipped with one end and is equipped with a plurality of lock teeth along the circumferencial direction, lock tooth and spline groove one-to-one, and the lock tooth can with spline the groove grafting, the lock tooth is inside to be equipped with radial recess, the screw rod correspondence is equipped with can with radial protruding of every radial recess cooperation.
As a further improvement of the technical scheme, a baffle plate for preventing the nut from being separated from the screw rod is arranged at one end of the screw rod in threaded fit with the nut.
As a further improvement of the above technical solution, the locking teeth are elastic teeth.
As a further improvement of the technical scheme, the screw rod is provided with an external thread, and the nut is provided with an internal thread matched with the external thread.
As a further improvement of the technical scheme, a polygonal bolt head is arranged at one end of the screw rod, which is close to the limiting sleeve.
As a further improvement of the technical scheme, one end of the screw rod, which is close to the limiting sleeve, is provided with an inner hexagonal bolt head.
As a further improvement of the technical scheme, the radial limiting part of the limiting sleeve abuts against the end face of the fastened piece, a concave part is arranged on the end face of the radial limiting part facing the fastened piece, and a convex part is correspondingly arranged on the end face of the fastened piece.
As a further improvement of the technical scheme, the radial limiting part of the limiting sleeve abuts against the end face of the fastened piece, and the radial limiting part is bonded with the end face of the fastened piece.
As a further improvement of the above technical solution, the radial protrusion is provided in a ring shape.
As a further improvement of the technical scheme, the rotation stopping groove and the lock tooth are both strip-shaped.
Compared with the prior art, the invention has the advantages that:
the single-sided fastening bolt is specially used for realizing the fastening function under the condition that certain single sides are shielded or the single-sided space is limited, the screw rod, the limiting sleeve and the nut form an inseparable whole, the nut moves under the action of the thread force by rotating the screw rod so as to press a fastened piece, and the lock teeth are respectively unfolded (expanded) outwards under the action of radial protrusions of the screw rod in the moving process of the nut so as to press the fastened piece by the nut.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the structure of the screw of the present invention.
Fig. 3 is a schematic structural view of the stop collar of the present invention.
Fig. 4 is a schematic structural view of the nut of the present invention.
FIG. 5 is a schematic view of the unlocked state of the present invention.
Fig. 6 is a schematic view of the locked state of the present invention.
The reference numerals in the figures denote:
1. a screw; 101. a radial projection; 11. an external thread; 12. a polygonal bolt head; 2. a limiting sleeve; 21. a radial position-limiting part; 22. a rotation stopping groove; 3. a nut; 301. a radial groove; 31. locking teeth; 32. an internal thread; 4. a baffle plate; 5. and (7) fastening the piece.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
As shown in fig. 1 to 6, the single-sided fastening bolt of this embodiment includes a screw rod 1, a stop collar 2 and a nut 3, there is no relative rotation between the screw rod 1 and the stop collar 2, one end of the stop collar 2 is provided with a radial limit portion 21, the other end is provided with a plurality of rotation-stopping grooves 22 along the circumferential direction, the rotation-stopping grooves 22 have openings facing away from the radial limit portion 21, the nut 3 is provided with one end provided with a plurality of locking teeth 31 along the circumferential direction, the locking teeth 31 are in one-to-one correspondence with the rotation-stopping grooves 22, the locking teeth 31 can be inserted into the rotation-stopping grooves 22, radial grooves 301 are provided inside the locking teeth 31, and the screw rod 1 is correspondingly provided with radial protrusions 101 capable of being matched with each radial groove.
The limiting sleeve 2 and the nut 3 are both hollow structures, when in use, one end of the screw rod 1 penetrates through the limiting sleeve 2 to form a whole body through thread matching with the nut 3, the locking tooth 31 of the nut 3 is inserted into the rotation stopping groove 22 of the limiting sleeve 2, the rotation stopping groove 22 is in insertion matching with the locking tooth 31 to prevent the nut 3 from rotating, before fastening, the radial bulge 101 on the screw rod 1 is just clamped in the radial groove 301 of the locking tooth 31, the whole body is put into the through hole of the fastened piece 5, the radial limiting part 21 of the limiting sleeve 2 is abutted against the front end face of the fastened piece 5, a connecting structure is arranged between the radial limiting part 21 and the front end face of the fastened piece 5 to keep the limiting sleeve 2 and the screw rod 1 from rotating relatively, then the screw rod 1 starts to rotate, because the limiting sleeve 2 does not rotate, the rotation stopping groove 22 can limit the rotation of the nut 3, and the nut 3 can only move up and down, the nut 3, the radial groove 301 of the lock tooth 31 is separated from the radial protrusion 101 of the screw 1, the radial protrusion 101 downwards expands the lock tooth 31 along with the upward movement of the nut 3, the plurality of lock teeth 31 abut against the end surface of the back of the fastened piece 5 after being expanded, and the through hole of the fastened piece 5 is designed to be larger than the outer diameter of the lock tooth 31 when not expanded and smaller than the outer diameter of the fastened piece 31 after being expanded. Thus, the plurality of locking teeth 31 are spread and then contact with the end surface outside the through hole, and are locked between the nut and the radial limiting part 21 by the fastening piece 5, so that the fastening piece 5 is locked.
The novel single-side locking bolt is specially used for realizing a fastening function under the condition that certain single side is shielded or the condition that the single-side space is limited, and a screw rod 1, a limiting sleeve 2 and a nut 3 form an inseparable whole. The nut 3 is moved under the action of the thread force by rotating the screw 1 so as to press the fastened piece, and the locking teeth 31 are respectively expanded (spread) outwards under the action of the radial protrusions 101 of the screw 1 during the movement of the nut 3, so that the nut 3 presses the fastened piece 5.
In this embodiment, a baffle 4 is disposed at one end of the screw rod 1 in threaded engagement with the nut 3 for preventing the nut 3 from separating from the screw rod 1. The screw 1 and the baffle 4 are preferably connected by welding. The screw 1 is provided with an external thread 11 and the nut 3 is provided with an internal thread 32 cooperating with the external thread 11, both ensuring the screw-thread cooperation with the thread 3. It should be noted that the screw 1 and the baffle 4 may be connected by a screw or other snap-fit connection.
In this embodiment, the locking teeth 31 are elastic teeth, have certain elasticity, and can be restored to the original state without external force, that is, when being spread, the locking teeth can be restored without being stressed.
In this embodiment, a polygonal bolt head 12 is disposed at one end of the screw rod 1 close to the position-limiting sleeve 2. Preferably, the bolt head is a hexagon head, so that a wrench or a socket can be conveniently used for fastening, and it should be noted that the upper end of the screw 1 may also be an inner hexagon bolt head or a cross bolt head, as long as the bolt head can be matched with a wrench or a socket wrench.
In a specific application example, a connection structure needs to be arranged between the radial limiting portion 21 and the front end face of the fastened piece 5, so that the limiting sleeve 2 and the screw rod 1 are kept from rotating relatively, the radial limiting portion 21 of the limiting sleeve 2 abuts against the end face of the fastened piece 5, in this embodiment, preferably, the radial limiting portion 21 is provided with a concave portion facing the end face of the fastened piece 5, and the end face of the fastened piece 5 is correspondingly provided with a convex portion which is in concave-convex fit with the convex portion to prevent the radial limiting portion 21 from rotating along with the screw rod 1. In addition to the preferred embodiments of the present invention, the radial direction position-limiting portion 21 and the end surface of the fastened member 5 may be bonded together by bonding, or a rough surface may be provided on the back surface of the radial direction position-limiting portion 21, so that the rotation is relatively difficult when the rotation contacts the end surface of the fastened member 5.
In this embodiment, the radial protrusion 101 is annular, so that the radial grooves 301 on all the locking teeth 31 can be matched with the radial protrusion 101, and the rotation stopping grooves 22 and the locking teeth 31 are both strip-shaped, so that the processing is convenient. It should be noted that the radial protrusions 101 may also be single protrusions, and the number of the protrusions corresponds to the number of the radial grooves 301, and they are matched with each other.
The working principle is as follows:
the lower end of the screw rod 1 penetrates through the limiting sleeve 2 and the nut 3, and the baffle 4 is welded at the bottom to prevent the nut 3 from falling off.
When the stop collar 2 is held stationary, the polygonal bolt head 12 of the threaded rod 1 is rotated, causing the nut 3 to move away from the bolt head under the interaction of the external thread 11 and the internal thread 32 until it is blocked by the stop plate 4. At this point the bolt head will not be able to rotate further and the radial projection 101 at the lower end of the screw 1 will be just in the radial groove 301 on the locking tooth 31. As shown in fig. 5, the state is the normal bit.
The screw 1, the limiting sleeve 2 and the nut 3 which are in normal positions integrally penetrate through the through hole of the fastened piece 5, the bolt head is rotated in the direction opposite to the previous direction, the nut moves in the direction close to the bolt head, the radial groove 301 on the lock tooth 31 moves upwards along with the bolt head, the radial protrusion 101 abuts against the lock tooth 31, as shown in fig. 6, the lock tooth 31 is ejected to be elastically deformed and is outwards supported, the outermost size of the lock tooth 31 is larger than the outer diameter of the through hole of the fastened piece 5, the bolt head is continuously rotated until enough pressing force is formed among the integral polygonal bolt head 12, the radial limiting part 21 and the nut 3, the fastened piece 5 is pressed, and locking is finally achieved. When disassembling, the polygonal bolt head 12 is rotated reversely.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. A single-sided fastening bolt characterized by: including screw rod (1), stop collar (2) and nut (3) screw-thread fit are passed to screw rod (1) one end, no relative rotation between screw rod (1) and stop collar (2), the one end of stop collar (2) is equipped with radial spacing portion (21), and the other end is equipped with a plurality of groove (22) that splines along the circumferencial direction, groove (22) that splines have the opening, and the opening dorsad radial spacing portion (21), nut (3) are equipped with one end and are equipped with a plurality of lock teeth (31) along the circumferencial direction, lock tooth (31) and groove (22) one-to-one, and lock tooth (31) can peg graft with groove (22) that splines, lock tooth (31) inside is equipped with radial recess (301), screw rod (1) correspondence is equipped with can with radial recess (301) the radial protruding (101) of every cooperation.
2. The single-sided fastening bolt according to claim 1, characterized in that: and a baffle (4) for preventing the nut (3) from being separated from the screw rod (1) is arranged at one end of the screw rod (1) in threaded fit with the nut (3).
3. The single-sided fastening bolt according to claim 1, characterized in that: the locking teeth (31) are elastic teeth.
4. The single-sided fastening bolt according to claim 1, characterized in that: the screw rod (1) is provided with an external thread (11), and the nut (3) is provided with an internal thread (32) matched with the external thread (11).
5. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: one end of the screw rod (1) close to the limiting sleeve (2) is provided with a polygonal bolt head (12).
6. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: and one end of the screw rod (1) close to the limiting sleeve (2) is provided with an inner hexagonal bolt head.
7. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: the radial limiting part (21) of the limiting sleeve (2) abuts against the end face of the fastened piece (5), a concave part is arranged on the end face, facing the fastened piece (5), of the radial limiting part (21), and a convex part is correspondingly arranged on the end face of the fastened piece (5).
8. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: the radial limiting part (21) of the limiting sleeve (2) abuts against the end face of the fastened piece (5), and the radial limiting part (21) is bonded with the end face of the fastened piece (5).
9. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: the radial projection (101) is arranged in a ring shape.
10. The single-sided fastening bolt according to any one of claims 1 to 4, characterized in that: the rotation stopping groove (22) and the locking teeth (31) are both strip-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910918434.2A CN112555255B (en) | 2019-09-26 | 2019-09-26 | Single-face fastening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910918434.2A CN112555255B (en) | 2019-09-26 | 2019-09-26 | Single-face fastening bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112555255A true CN112555255A (en) | 2021-03-26 |
| CN112555255B CN112555255B (en) | 2022-11-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910918434.2A Active CN112555255B (en) | 2019-09-26 | 2019-09-26 | Single-face fastening bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112555255B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5556125A (en) * | 1995-07-21 | 1996-09-17 | Morton International, Inc. | Air bag inflator for snap-on attachment to a steering wheel |
| CA2603635A1 (en) * | 2006-09-21 | 2008-03-21 | Alcoa Global Fasteners, Inc. | High performance sleeved interference fasteners for composite applications |
| US20140227060A1 (en) * | 2011-10-27 | 2014-08-14 | Böllhoff Verbindungstechnik GmbH | Fastening element with a tolerance-compensation function |
| CN105840611A (en) * | 2016-05-26 | 2016-08-10 | 鲁东大学 | High-strength bolt assembly used for single-side mounting |
| US20160305465A1 (en) * | 2015-04-17 | 2016-10-20 | Enduralock, Llc | Locking fastener with deflectable lock |
| CN106300878A (en) * | 2016-10-25 | 2017-01-04 | 株洲中车机电科技有限公司 | A kind of linear electric motors tablet installs stop device |
| CN108506305A (en) * | 2018-04-22 | 2018-09-07 | 湖北天图桥梁技术研究有限公司 | The single side fastening bolt of replaceable anti-vertically and horizontally bidirectional load |
| CN108571510A (en) * | 2018-06-28 | 2018-09-25 | 同济大学 | A kind of convertible unilateral bolt fastener |
| CN208885741U (en) * | 2018-09-11 | 2019-05-21 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of single side securing member that can quickly repeat installation |
| CN209195907U (en) * | 2018-12-05 | 2019-08-02 | 青岛理工大学 | Unilateral bolt |
-
2019
- 2019-09-26 CN CN201910918434.2A patent/CN112555255B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5556125A (en) * | 1995-07-21 | 1996-09-17 | Morton International, Inc. | Air bag inflator for snap-on attachment to a steering wheel |
| CA2603635A1 (en) * | 2006-09-21 | 2008-03-21 | Alcoa Global Fasteners, Inc. | High performance sleeved interference fasteners for composite applications |
| US20140227060A1 (en) * | 2011-10-27 | 2014-08-14 | Böllhoff Verbindungstechnik GmbH | Fastening element with a tolerance-compensation function |
| US20160305465A1 (en) * | 2015-04-17 | 2016-10-20 | Enduralock, Llc | Locking fastener with deflectable lock |
| CN105840611A (en) * | 2016-05-26 | 2016-08-10 | 鲁东大学 | High-strength bolt assembly used for single-side mounting |
| CN106300878A (en) * | 2016-10-25 | 2017-01-04 | 株洲中车机电科技有限公司 | A kind of linear electric motors tablet installs stop device |
| CN108506305A (en) * | 2018-04-22 | 2018-09-07 | 湖北天图桥梁技术研究有限公司 | The single side fastening bolt of replaceable anti-vertically and horizontally bidirectional load |
| CN108571510A (en) * | 2018-06-28 | 2018-09-25 | 同济大学 | A kind of convertible unilateral bolt fastener |
| CN208885741U (en) * | 2018-09-11 | 2019-05-21 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of single side securing member that can quickly repeat installation |
| CN209195907U (en) * | 2018-12-05 | 2019-08-02 | 青岛理工大学 | Unilateral bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112555255B (en) | 2022-11-29 |
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