CN211343614U

CN211343614U - Plug-in bolt component convenient to disassemble

Info

Publication number: CN211343614U
Application number: CN201922159438.5U
Authority: CN
Inventors: 杜万才; 杜代钊
Original assignee: Nanchong Engineering And Plastic Parts Co ltd
Current assignee: Nanchong Engineering And Plastic Parts Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-08-25
Anticipated expiration: 2029-12-05

Abstract

A plug-in bolt component convenient to disassemble relates to the technical field of fasteners, and adopts the technical scheme that the plug-in bolt component comprises a bolt, wherein the bolt is detachably connected with a nut, the bolt comprises a round table-shaped screw rod, one end of the screw rod with a large cross section area is connected with a bolt head, and one end of the screw rod with a small cross section area is connected with a lock head; the nut comprises a head and a sleeve, the head is fixedly connected to the rear end of the sleeve, two centrosymmetric gaps extending from the front end in the axial direction are formed in the sleeve, and the sleeve is divided into two expansion parts by the gaps; the sleeve is internally provided with a chute for the lock head to pass through, and the rear end of the sleeve is provided with a limit circular groove. The utility model discloses when having guaranteed the firmness between the part connected, become the form of plug with the installation of bolt and dismantlement process, manual operation is more convenient, simple structure moreover, and is with low costs.

Description

Plug-in bolt component convenient to disassemble

Technical Field

The utility model relates to a fastener technical field especially relates to a convenient plug-in bolt component who dismantles.

Background

The bolt is a cylindrical threaded fastener matched with a nut, consists of a head part and a screw rod, and is required to be matched with the nut to be used for fastening and connecting two parts with through holes. The application range of the bolt is very wide, and the bolt has various types, such as a precise bolt used on a digital product; micro bolts used for DVDs, cameras, glasses, clocks, electronics, and the like; general bolts used for televisions, electric appliances, musical instruments, furniture, and the like; as for the engineering, construction and bridge, large bolts are used.

When the existing bolt is used, the bolt needs to penetrate through a through hole of a part, and a nut is rotated and tightly sleeved on a screw rod; when the disassembly is needed, an additional tool is needed, which is troublesome and takes a long time. On the other hand, in small parts, a special bolt which is convenient to fasten and dismount manually and has low cost is needed.

Therefore, it is necessary to design a bolt having sufficient fastening performance while facilitating fastening and detachment.

SUMMERY OF THE UTILITY MODEL

To the inconvenient manual problem of fastening and dismantling of ordinary bolt among the prior art scheme, the utility model provides a convenient plug-in bolt component of dismantling

The utility model provides a following technical scheme: a plug-in bolt component convenient to disassemble comprises a nut, wherein the nut is detachably connected with a bolt, the bolt comprises a round table-shaped screw rod, a bolt head is connected with one end of the screw rod with a large cross section area, and a lock head is connected with one end of the screw rod with a small cross section area; the nut comprises a head and a sleeve, the head is fixedly connected to the rear end of the sleeve, two axisymmetric gaps extending from the front end along the axial direction are formed in the sleeve, and the symmetry axis is a vertical central axis of a projection circle of the sleeve in the axial direction; the gap divides the sleeve into two expansion parts; the sleeve is internally provided with a chute for the lock head to pass through, and the rear end of the sleeve is provided with a limit circular groove.

Through adopting above technical scheme, during the installation, pass the through-hole of part with the sleeve pipe of nut, the tapered end of bolt is aimed at the spout and is inserted the sleeve pipe, extrudees the sleeve pipe, makes the inflation portion of sleeve pipe both sides deviate from the gap and expand, extrudees the inner wall of through-hole. After the bolt stretches into the bottom of the sleeve, the bolt is rotated by 90 degrees, and the lock head is clamped into the limiting circular groove to complete fastening. The length of the expansion part is in a larger proportion than the whole length of the sleeve, so that the contact area between the expanded sleeve and the through hole is larger, and the stability of the sleeve is improved. The lock head can be matched with the limiting circular groove to further lock the relative positions of the bolt and the nut. When the bolt is disassembled, the bolt is only required to be rotated by 90 degrees and pulled out.

In a specific embodiment, the inner diameter of the sleeve becomes smaller in a step manner from the front end to the rear end, the limiting circular groove is connected to the rear end of the position where the inner diameter of the sleeve is the smallest, and the diameter of the limiting circular groove is larger than the smallest inner diameter of the sleeve.

By adopting the technical scheme, the stepped change of the inner diameter of the sleeve is used for matching with the round table-shaped bolt, so that the two are combined more tightly than a straight section; and secondly, all parts in the axial direction are stressed more uniformly when the expansion part is expanded.

Preferably, a plurality of triangular anti-slip teeth are arranged on the outer wall of the expansion part.

Through adopting foretell technical scheme, the antiskid tooth closed angle direction of triangle-shaped outwards can withstand the through-hole inner wall, increases its circumferential frictional force, and the sleeve pipe is rotatory along with the bolt rotation when preventing to install.

Preferably, the side of the head of the nut facing the sleeve is provided with an anti-slip groove.

Through adopting above technical scheme, the friction between nut and the part can be increased to the antiskid groove.

Preferably, the screw is provided with a galling surface.

By adopting the technical scheme, the surface area of the screw is increased by the roughened surface of the screw, the frictional combination between the screw and the inner wall of the sleeve can be increased, and the effect of the frictional combination is more obvious at the part with the smaller inner diameter of the sleeve.

Preferably, the bolt head is further provided with a handle.

Through adopting above technical scheme, the handle can increase the flexibility and the maneuverability of bolt, easy to assemble and dismantlement.

The utility model discloses the technical scheme who adopts, when having guaranteed the firmness between the part connected, become the form of plug with the installation of bolt and dismantlement process, manually operation is more convenient, simple structure moreover, and is with low costs, and the fit range is wide.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of an embodiment of the present invention.

Fig. 2 is a side view of an embodiment of the nut of the present invention.

Fig. 3 is a schematic side view of the nut according to an embodiment of the present invention.

Fig. 4 is a front view of an embodiment of the nut of the present invention.

Fig. 5 is a top view of an embodiment of the bolt of the present invention.

Fig. 6 is a side view of an embodiment of the bolt of the present invention.

Fig. 7 is a schematic sectional view of an embodiment of the present invention after installation.

Reference numerals: 1-bolt, 11-screw, 12-bolt head, 121-handle, 13-tapered end, 2-nut, 21-head, 22-sleeve, 221-gap, 222-expansion part, 223-limit circular groove, 224-anti-slip tooth.

Detailed Description

The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model provides a conveniently-disassembled plug-in bolt component as shown in figure 1, which comprises a bolt 1, wherein the bolt 1 is detachably connected with a nut 2, the bolt 1 comprises a round platform-shaped screw rod 11, the end with a large cross section area of the screw rod is connected with a bolt head 12, and the end with a small cross section area of the screw rod is connected with a lock head 13; the nut 2 comprises a head 21 and a sleeve 22, the head 21 is fixedly connected to the rear end of the sleeve 22, two axially symmetric gaps 221 extending from the front end along the axial direction are formed in the sleeve 22, and the symmetric axis is a vertical central axis of a projection circle of the sleeve 22 in the axial direction; the slit 221 divides the casing 22 into two expanded portions 222; a sliding groove for the lock head 13 to pass through is further arranged in the sleeve 22, and a limiting circular groove 223 is arranged at the rear end of the sleeve.

When the bolt component is installed, the bolt component with the sleeve with the proper diameter and length is selected according to the diameter and the length of the through hole of the part to be fastened and connected. The structure of the nut is shown in fig. 2, 3 and 4, and the structure of the bolt is shown in fig. 5 and 6.

The sleeve of the nut can be penetrated into the through hole, the tapered end of the bolt is aligned to the sliding groove of the sleeve, and the bolt is jacked into the sleeve by jacking the bolt head. The minimum diameter of the screw is equal to the minimum diameter of the sleeve, the maximum diameter of the screw is required to be slightly larger than the maximum diameter of the sleeve, the screw extrudes the inner wall of the sleeve, the two expansion parts are expanded to two sides away from the gap, and the two expansion parts are extruded on the inner wall of the through hole and are tightly combined with the through hole. After the screw rod contacts the bottom surface of the limiting circular groove at the tail end of the sleeve, the bolt is rotated by 90 degrees, so that the lock head is clamped into the limiting circular groove, and the installation is completed in a state shown in fig. 7.

The straight seam can be selected as the seam, and the distance of the seam is about 2-10mm according to the overall size of the bolt component, so that the sleeve can be divided into two parts to deform and expand towards two sides; the length of the gap determines the length of the expansion part, and compared with the overall length of the sleeve, the expansion part is required to occupy a larger proportion, so that the contact area between the sleeve and the through hole after the sleeve is extruded and expanded is larger, and the stability of the overall structure is improved. The width of the lock head is equal to the axial length of the limiting circular groove, and the lock head and the limiting circular groove are matched with each other to further lock the relative positions of the bolt and the nut.

When the bolt needs to be disassembled, the bolt only needs to be rotated by 90 degrees to align the sliding groove again, and the bolt is pulled out forcibly. Therefore, the rotary connection mode of the common bolt and nut is changed into a plug-in mode, and the installation and the disassembly are simpler and more convenient.

All components of the nut and the bolt can be made of polyhexamethylene adipamide materials, and the nut and the bolt have the characteristics of wear resistance, high tensile strength, high temperature resistance and the like, and are low in cost and light in weight.

As shown in fig. 3, as an embodiment, the inner diameter of the sleeve 22 is gradually reduced from the front end to the rear end, and the circular limit groove 223 is connected to the rear end of the minimum inner diameter of the sleeve, and the diameter of the circular limit groove is larger than the minimum inner diameter of the sleeve.

The inner diameter of the sleeve is stepped, and the axial length of each step can be equal, and at least two steps are required. Firstly, the bolt is matched with a round table-shaped bolt with a small end and a large end, so that the round table-shaped bolt and the round table-shaped bolt are combined more tightly; and secondly, when the expansion part is extruded to expand, all parts in the radial direction are stressed more uniformly. Finally, the stability between the sleeve and the through hole is better, and the firmness of connection is ensured. The diameter of the limiting circular groove is larger than the minimum inner diameter of the sleeve, so that a clamping groove can be formed, and a lock head of the bolt can be clamped.

Preferably, the outer wall of the expansion portion 222 is provided with a plurality of triangular anti-slip teeth 224.

When the expansion part is extruded and tightly attached to the inner wall of the through hole, the anti-slip teeth can prop against the inner wall of the through hole, the friction force between the sleeve and the through hole is increased, and the nut is prevented from rotating along with the rotation of the bolt during installation. The number of the anti-skid teeth is at least two. The height of the anti-skid teeth is not larger than half of the distance of the gap, and the inclined edges on the two sides of the top surface of the anti-skid teeth can ensure that the sleeve can axially move in the through hole of the connected part.

As shown in fig. 4, the head 21 of the nut 2 is preferably provided with anti-slip grooves on the side facing the sleeve.

The anti-skidding groove can increase the frictional force on the surface of the nut fitting part and prevent the nut from rotating.

Preferably, said screw 11 is provided with a galling surface.

The roughened surface of the screw increases the surface area of the screw, so that the friction force between the screw and the inner wall of the sleeve can be increased, and the relative sliding between the screw and the sleeve after the installation is prevented.

Preferably, the bolt head 12 is further provided with a handle 121.

The handle can make the installation and the dismantlement process more nimble and convenient.

The above is an embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a convenient plug-in bolt component of dismantling, includes bolt (1), bolt (1) releasable connection has nut (2), its characterized in that: the bolt (1) comprises a round table-shaped screw rod (11), a bolt head (12) is connected to one end with a large cross section area of the screw rod, and a lock head (13) is connected to one end with a small cross section area of the screw rod; the nut (2) comprises a head (21) and a sleeve (22), the head (21) is fixedly connected to the rear end of the sleeve (22), two axially symmetric gaps (221) extending from the front end in the axial direction are formed in the sleeve (22), and the symmetric axis is a vertical central axis of a projection circle of the sleeve (22) in the axial direction; the slit (221) divides the casing (22) into two expanded portions (222); the sleeve (22) is also internally provided with a sliding groove for the lock head (13) to pass through, and the rear end of the sleeve is provided with a limiting circular groove (223).

2. A removable bolt member according to claim 1, wherein: the internal diameter of sleeve pipe (22) is the cascaded diminishing from the front end to the rear end, the rear end at the minimum department of sleeve pipe internal diameter is connected to spacing circular slot (223), the diameter of spacing circular slot is greater than the minimum internal diameter of sleeve pipe.

3. A removable bolt member according to claim 1, wherein: the outer wall of the expansion part (222) is provided with a plurality of triangular anti-skidding teeth (224).

4. A removable bolt member according to claim 1, wherein: the side of the head (21) of the nut (2) facing the sleeve is provided with an anti-skid groove.

5. A removable bolt member according to claim 1, wherein: the screw (11) is provided with a roughened surface.

6. A removable bolt member according to claim 1, wherein: the bolt head (12) is also provided with a handle (121).