CN218670124U - Anti-drop combined fastener - Google Patents
Anti-drop combined fastener Download PDFInfo
- Publication number
- CN218670124U CN218670124U CN202222047078.1U CN202222047078U CN218670124U CN 218670124 U CN218670124 U CN 218670124U CN 202222047078 U CN202222047078 U CN 202222047078U CN 218670124 U CN218670124 U CN 218670124U
- Authority
- CN
- China
- Prior art keywords
- hole
- boss
- bolt
- sleeve
- chamfer
- 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.)
- Active
Links
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
Images
Landscapes
- Connection Of Plates (AREA)
Abstract
The utility model discloses an anti-drop combined fastener, wherein, the bolt consists of a bolt head, a polished rod, a boss and a screw rod which are connected into a whole in sequence; the outer diameter of the polish rod is smaller than the outer diameters of the bolt head and the lug boss; the upper end of the boss is in transitional connection with the lower end of the polished rod through an upper end chamfer, and the lower end of the boss is in transitional connection with the screw rod through a lower end chamfer; the inner hole of the sleeve is formed by communicating and connecting a leading-in hole, a clamping hole and a unthreaded hole in sequence; the leading-in hole is a chamfer leading-in hole with a wide upper part and a narrow lower part, and the chamfer angle of the leading-in hole is larger than or equal to the angle of the lower end chamfer; the inner diameter of the clamping hole is smaller than that of the unthreaded hole and larger than that of the boss. The utility model discloses combination fastener can avoid the phenomenon of combination fastener sub-assembly separation in the transportation after the combination through simple integrated configuration, when guaranteeing that supporting sub-assembly does not break away from, convenient operation effectively promotes the installation effectiveness.
Description
Technical Field
The utility model belongs to the technical field of the fastener is made, concretely relates to prevent combination fastener that supporting sub-assembly breaks away from.
Background
Fasteners are a very widely used class of mechanical parts for fastening connections. A wide variety of fasteners are found on a variety of machines, equipment, vehicles, boats, railways, bridges, buildings, structures, tools, instruments, meters, supplies, and the like.
The bolt and the sleeve are combined together in a matched mode before the combined bolt leaves a factory, so that the combined bolt is more convenient to use at a later stage. The inner diameter of the sleeve 20 of the existing combination bolt is generally designed to be larger than or equal to the outer diameter of the thread of the bolt 10, the bolt 10 and the sleeve 20 are directly combined and installed through clearance fit, the polished rod portion 11 of the bolt 10 and the polished rod portion 21 of the sleeve 20 are in clearance fit, the sleeve 20 is not constrained, and the sleeve 20 falls off from the bolt 10 due to vibration and the like during transportation of the combination bolt. The bolt 10 and the sleeve 20 are easily separated, so that the prior combined bolt needs to select the proper sleeve 20 again for complete matching when in use, and the mounting efficiency is low.
SUMMERY OF THE UTILITY MODEL
For solving the problem that prior art exists, the utility model provides an anticreep combination fastener. This combined fastener passes through simple integrated configuration, can avoid the phenomenon of combined part separation in the transportation of combined fastener after the combination, when guaranteeing that supporting combined part does not break away from, convenient operation effectively promotes the installation effectiveness.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an anti-drop combined fastener comprises a bolt and a sleeve; the sleeve is sleeved on the bolt; wherein,
the bolt consists of a bolt head, a polished rod, a boss and a screw rod which are sequentially connected into a whole; the outer diameter of the polish rod is smaller than the outer diameters of the bolt head and the lug boss;
the upper end of the boss is in transitional connection with the lower end of the polished rod through an upper end chamfer, and the lower end of the boss is in transitional connection with the screw rod through a lower end chamfer;
the inner hole of the sleeve is formed by communicating and connecting a leading-in hole, a clamping hole and a unthreaded hole in sequence; the leading-in hole is a chamfer leading-in hole with a wide upper part and a narrow lower part, and the chamfer angle of the leading-in hole is greater than or equal to the angle of the lower chamfer; the inner diameter of the clamping hole is smaller than that of the unthreaded hole and larger than that of the boss.
According to the anti-falling combined fastener, the boss and the clamping hole are in interference fit, and after the sleeve is sleeved into the bolt, the sleeve is clamped on the boss or the lower end chamfer.
According to the anti-falling combined fastener, the sleeve is composed of the sleeve head part and the straight rod part, and the unthreaded hole and the straight rod part are designed coaxially.
The technical scheme provided by the above has the following beneficial effects:
be different from current combination bolt, the utility model discloses anticreep combination fastener passes through the boss and the sheathed tube card hole of bolt, and both adopt interference fit's assembly methods, guarantee that the material in boss and card hole takes place elastic deformation after the extrusion, kick-backs to the original condition after the extrusion is finished. The outer diameter of the boss is larger than the inner diameter of the clamping hole after rebounding, and the clamping hole is supported by the upper end chamfer of the bolt, so that the sleeve is prevented from falling off. The utility model discloses anticreep combination fastener simple structure, the installation effectiveness is high.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a front view schematic of a prior art bolt;
FIG. 2 is a cross-sectional structural schematic view of a prior art sleeve;
FIG. 3 is a cross-sectional structural schematic view of a prior art combination bolt;
fig. 4 is a schematic front view of the bolt of the present invention;
fig. 5 is a schematic cross-sectional view of the sleeve of the present invention;
fig. 6 is a perspective view of the assembled bolt of the present invention;
fig. 7 is a schematic perspective view of the combination bolt of the present invention;
FIG. 8 is a schematic cross-sectional view of the sleeve of the present invention before the bolt is inserted;
FIG. 9 is a schematic view of the sleeve of the present invention in a partial cross-sectional view during the process of inserting the bolt;
FIG. 10 is a schematic cross-sectional view of the sleeve after the bolt is inserted;
fig. 11 is an enlarged schematic view of a portion a of fig. 10.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the claims, the specification and the drawings, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.
In the claims, the specification and the drawings, unless otherwise expressly limited, to the extent that directional terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" and the like are used, the positional or orientational relationships illustrated in the drawings are based on the positional and orientational relationships illustrated in the drawings and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention in any way.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the term "fixedly connected" or "fixedly connected" is used, which is to be understood broadly, that is, any connection mode without displacement relation or relative rotation relation between the two, that is, including non-detachably fixed connection, integrated connection and fixed connection through other devices or elements.
In the claims, the specification and the drawings, the terms "including", "comprising" and variations thereof, if used, are intended to be inclusive and not limiting.
Referring now to fig. 4 to 11, the anti-separation fastening assembly of the present invention is described, which includes a bolt 100 and a sleeve 200, wherein the sleeve 200 is sleeved on the bolt 100.
As shown in fig. 4, 6 and 7, the bolt 100 of the present invention comprises a bolt head 110, a polish rod 120, a boss 130 and a screw 140 which are connected in sequence. In this embodiment, the bolt head 110 is cylindrical and has an inner hexagonal structure, and the diameter of the bolt head 110 is 10mm to 14mm. The polish rod 120 connected to the lower end of the bolt head 110 has a cylindrical shape, and the outer diameter of the polish rod 120 is smaller than the outer diameters of the bolt head 110 and the boss 130, so that the sleeve 200 can move within the polish rod 120 after the sleeve 200 is sleeved on the bolt 100. In the embodiment, the diameter of the polish rod is 5mm-6mm, and the length of the polish rod is 7mm-9mm.
The upper end of the boss 130 is in transition connection with the lower end of the polish rod 120 through an upper end chamfer 150; in this embodiment, the upper chamfer 150 has an angle of 100 ° to 120 °. The lower end of the boss 130 is in transition connection with the screw 140 through a lower end chamfer 160; before the sleeve 200 is fitted over the bolt 100, the lower end chamfer 160 is fitted into the introduction hole 230 of the sleeve 200, and the angle of the lower end chamfer 160 is smaller than or equal to the chamfer angle of the introduction angle, so that the bolt 100 can more easily enter the sleeve 200. In this embodiment, the angle of the lower chamfer 160 is 60 ° to 90 °. The lower end of the lower end chamfer 160 is connected with the screw 140; in this embodiment, the length of the screw 140 is 12mm to 14mm, and the external thread of the screw 140 is M6.
In this embodiment, the boss 130 is cylindrical, the boss 130 has a diameter of 6.30mm to 6.50mm and a length of 1.9mm to 2.10mm; preferably, the shape of the boss 130 may also be designed to be hexagonal, spherical, etc. The boss 130 is fitted into the fastening hole 240 of the sleeve 200, and after the sleeve 200 is fitted into the boss 130 of the bolt 100 by interference fit, the sleeve 200 is fastened to the boss 130 or the lower chamfer 160.
As shown in fig. 5, 6 and 7, the sleeve 200 of the present invention is composed of a sleeve head portion 210 and a straight rod portion 220 outside the sleeve 200. In this embodiment, the head portion 210 of the ferrule tube is cylindrical, and the outer diameter is 12mm to 16mm; the straight rod part 220 connected with the lower end of the casing head part 210 has a diameter of 8mm-10mm and a length of 9mm-13mm. The interior of the sleeve 200 is formed by sequentially connecting an introduction hole 230, a clamping hole 240 and a light hole 250. The lead-in hole 230 is a chamfered lead-in hole with a wide upper part and a narrow lower part, and the lead-in hole 230 is matched with the lower chamfer 160 of the bolt 100, so that the bolt 100 can enter the sleeve more easily. The angle of the lower chamfer in this embodiment is 60 to 90 degrees, and the chamfer angle of the lead-in hole 230 is greater than or equal to the angle of the lower chamfer 160.
The unthreaded hole 250 and the straight rod part 220 are coaxially designed, and the unthreaded hole 250 has an inner diameter of 7mm-7.50mm and a length of 8.50mm-10mm.
The fastening hole 240 is cylindrical, and the inner diameter of the fastening hole 240 is smaller than the inner diameter of the unthreaded hole 250 and larger than the diameter of the boss 130, so that the fastening hole 240 is matched with the boss 130, and after the sleeve 200 is sleeved on the boss 130 through interference fit, the sleeve 200 is fastened on the boss 130 of the bolt 100. In this embodiment, the inner diameter of the fastening hole 240 is 6.10mm to 6.30mm, and the length thereof is 0.50mm to 0.8mm.
As shown in fig. 8, before the anti-separation combined fastener is combined, the part of the leading-in hole 230 of the sleeve 200 is abutted to the part of the lower end chamfer 160 of the bolt 100, a downward force F is applied to the bolt through a die, the lower end chamfer 160 and the leading-in hole 230 are firstly contacted and extruded at the moment, and the angle of the 6-lower end chamfer 160 is smaller than or equal to the chamfer angle of the leading-in hole 230, so that the sleeve 200 can be better led into the bolt 100.
As shown in fig. 9, the boss 130 is in interference fit with the fastening hole 240, and the boss 130 and the fastening hole 240 in interference fit are extruded in the assembling process, so that the material is elastically deformed when the boss 130 and the fastening hole 240 are extruded, and can rebound to the original state after the extrusion is finished.
As shown in fig. 10, after the assembly is completed, the boss 130 and the locking hole 240 are pressed to be restored to the original state, and the upper end chamfer 150 of the bolt 100 supports the locking hole 240 to prevent the sleeve 200 from falling off.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (2)
1. An anti-drop combined fastener comprises a bolt (100) and a sleeve (200); the sleeve (200) is sleeved on the bolt (100); it is characterized in that, among them,
the bolt (100) consists of a bolt head (110), a polished rod (120), a boss (130) and a screw rod (140) which are sequentially connected into a whole; the outer diameter of the polish rod (120) is smaller than the outer diameters of the bolt head (110) and the boss (130);
the upper end of the boss (130) is in transitional connection with the lower end of the polished rod (120) through an upper end chamfer (150), and the lower end of the boss (130) is in transitional connection with the screw (140) through a lower end chamfer (160); the inner hole of the sleeve (200) is formed by sequentially communicating and connecting an introduction hole (230), a clamping hole (240) and a unthreaded hole (250); the leading-in hole (230) is a chamfer leading-in hole with a wide upper part and a narrow lower part, and the chamfer angle of the leading-in hole (230) is greater than or equal to the angle of the lower end chamfer (160); the inner diameter of the clamping hole (240) is smaller than that of the unthreaded hole (250) and larger than that of the boss (130); the boss (130) and the clamping hole (240) are in interference fit, and after the sleeve (200) is sleeved in the bolt (100), the sleeve (200) is clamped on the boss (130) or the lower end chamfer (160).
2. An anti-drop combined fastener comprises a bolt (100) and a sleeve (200); the sleeve (200) is sleeved on the bolt (100); it is characterized in that, among them,
the bolt (100) consists of a bolt head (110), a polished rod (120), a boss (130) and a screw rod (140) which are sequentially connected into a whole; the outer diameter of the polish rod (120) is smaller than the outer diameters of the bolt head (110) and the boss (130);
the upper end of the boss (130) is in transitional connection with the lower end of the polished rod (120) through an upper end chamfer (150), and the lower end of the boss (130) is in transitional connection with the screw (140) through a lower end chamfer (160); the inner hole of the sleeve (200) is formed by sequentially communicating and connecting an introduction hole (230), a clamping hole (240) and a unthreaded hole (250); the leading-in hole (230) is a chamfer leading-in hole with a wide upper part and a narrow lower part, and the chamfer angle of the leading-in hole (230) is greater than or equal to the angle of the lower end chamfer (160); the inner diameter of the clamping hole (240) is smaller than that of the unthreaded hole (250) and larger than that of the boss (130); the outer part of the sleeve (200) consists of a sleeve head part (210) and a straight rod part (220), and the unthreaded hole (250) and the straight rod part (220) are coaxially designed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222047078.1U CN218670124U (en) | 2022-08-04 | 2022-08-04 | Anti-drop combined fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222047078.1U CN218670124U (en) | 2022-08-04 | 2022-08-04 | Anti-drop combined fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218670124U true CN218670124U (en) | 2023-03-21 |
Family
ID=85555265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222047078.1U Active CN218670124U (en) | 2022-08-04 | 2022-08-04 | Anti-drop combined fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218670124U (en) |
-
2022
- 2022-08-04 CN CN202222047078.1U patent/CN218670124U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR200282855Y1 (en) | A Connecting Terminal for Storage Battery | |
| CN218670124U (en) | Anti-drop combined fastener | |
| CN108458176B (en) | Connector assembly, air conditioner and connector assembly assembling method | |
| US4162860A (en) | Flange-screw connection for rods in three-dimensional frameworks | |
| CN213470982U (en) | Screwing tool | |
| CN215634276U (en) | Bolt with adjustable length | |
| CN216259028U (en) | Novel structure axle center frame module of indoor body-building apparatus high stability | |
| CN211416937U (en) | A vehicle that is used for suspension assembly of vehicle and has it | |
| CN210819396U (en) | Nut mounting tool for lamp body | |
| CN217502237U (en) | High-strength nut | |
| CN212377066U (en) | Combined spring screw | |
| CN219365957U (en) | Anti-drop type limiting sucker rod device | |
| CN216343201U (en) | Quick-release connecting mechanism | |
| CN219282168U (en) | Connecting parent piece and connecting structure | |
| CN214221726U (en) | Anti-drop car repair gecko | |
| CN112922538A (en) | Geological drill rod | |
| CN221347578U (en) | Combined screw | |
| CN220220888U (en) | Automobile transverse pull rod assembly | |
| CN219774531U (en) | Telescopic rod | |
| CN217421784U (en) | Hinder and revolve shock attenuation expansion screw | |
| CN214305696U (en) | Copper pipe of easily connecting | |
| RU153964U1 (en) | NODE CONNECTION OF THE RODS OF THE SPATIAL FRAME OF BUILDINGS AND STRUCTURES | |
| CN212960223U (en) | Air conditioner refrigeration pipeline structure convenient to connect | |
| CN210361048U (en) | Special-shaped clamp for semiconductor device | |
| CN217582850U (en) | Bolt integrated form connecting rod bush |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |