CN217633317U

CN217633317U - Integral expansion bolt fastened in wall

Info

Publication number: CN217633317U
Application number: CN202220232014.6U
Authority: CN
Inventors: 朱启东
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-10-21
Anticipated expiration: 2032-01-25

Abstract

The utility model belongs to the technical field of fastener, especially, indicate to fasten the integral expansion bolts in the wall. The screw rod driving device is characterized in that a screw rod sleeve integrally arranged with an expansion pipe is sleeved on a driving rod part, the inner hole diameter of the screw rod sleeve is not smaller than the outer diameter of the whole screw rod, the driving rod part is composed of a connecting rod close to one end of a bolt head and a supporting shaft close to one end of the expansion rod part, and the screw rod sleeve is matched with the maximum outer diameter of the supporting shaft close to one end of the expansion rod part of the driving rod part. Above-mentioned the utility model provides a problem of the wholeness of bolt and expansion pipe, the expansion pipe has improved the holistic intensity of expansion bolt again with the integrative setting of screw rod sleeve pipe simultaneously, and the location of bolt has been guaranteed again in the setting of integral screw rod sleeve pipe to make integral expansion bolt have use and dismantle advantages such as convenient, firm in connection, location accuracy, good reliability.

Description

Integral expansion bolt fastened in wall

Technical Field

The utility model belongs to the technical field of fastener, especially, indicate to be fit for fastening in the wall or the integral expansion bolts of the usefulness of similar for example furniture board connection.

Background

In conventional sheet metal connections, it is usually necessary first to fasten expansion bolts to the connecting sheet metal, which usually comprise separate bolts and expansion pipes, which are provided with expansion blocks that can be expanded circumferentially. When the expansion bolt is used, the expansion pipe is inserted into the mounting hole which is formed in the connecting plate in advance, and then the bolt is screwed in to expand the expansion pipe and tightly stretch in the mounting hole, so that the purpose of fastening and connecting the expansion bolt and the connecting plate is achieved. The defects are that the expansion pipe is not easy to be used again, the damage of the components is not easy to replace, and even the expansion pipe needs to be punched again. Meanwhile, due to poor integrity and inaccurate bolt positioning, the connection accuracy of the plates is affected.

The other method is that the bolt and the expansion pipe are combined and inserted into a mounting hole which is formed in the connecting plate in advance, and then the bolt is rotated to expand and tighten the expansion pipe in the mounting hole, so that the purpose of fastening and connecting the expansion bolt assembly and the connecting plate is achieved. For example, in the prior art, the application number CN201820636795.9 is named as a furniture connecting piece, the application number 201710886973.3 is named as an expansion bolt kit, and the like, the structure combining the bolt and the expansion pipe is adopted, and meanwhile, in order to solve the problem of integral combination of the bolt and the expansion pipe, the expansion pipe is designed to be an opposite-opening structure. However, there is a problem in that the overall strength of the expansion pipe is lowered, resulting in a decrease in the coupling strength and reliability of the expansion bolt assembly with the coupling panel.

Disclosure of Invention

The utility model aims at overcoming the not enough and provide a simple structure that prior art exists, be convenient for installation and dismantlement, joint strength high reliability good fasten the integral expansion bolts in the wall.

Fasten in integral expansion bolts in wall: including bolt and expansion pipe, the bolt comprises screw rod and bolt head, the screw rod is including leaning on the drive rod portion and the expansion rod portion of the other end at bolt head one end, expansion rod portion is the screw rod of outband screw thread, the expansion pipe corresponds coaxial setting with expansion rod portion, and the expansion pipe is equipped with the circular cone screw, and the aperture of circular cone screw reduces along the direction that the screw rod was twisted expansion pipe portion gradually, and the expansion pipe is equipped with the axial incision, and the expansion piece that can radially expand is cut apart out to the expansion pipe along the border equipartition of expansion pipe, its characterized in that: the screw sleeve is sleeved on the transmission rod part and integrated with the expansion pipe, the inner hole diameter of the screw sleeve is not smaller than the outer diameter of the whole screw, the transmission rod part is composed of a connecting rod leaning against one end of a bolt head and a supporting shaft leaning against one end of the expansion rod part, and the screw sleeve is matched with the maximum outer diameter of the supporting shaft leaning against one end of the expansion rod part of the transmission rod part.

Above-mentioned the utility model provides a bolt and expansion pipe wholeness's problem, the integrative setting of expansion pipe and screw rod sleeve pipe has improved the holistic intensity of expansion bolts again simultaneously, and the location of bolt has been guaranteed again in the setting of screw rod sleeve pipe and back shaft to make integral expansion bolts have use and dismantle advantages such as convenient, firm in connection, location accuracy, good reliability. Meanwhile, the structure is simple, the assembly is very convenient, and the cost is lower.

The utility model discloses it is further preferred to the back shaft comprises the thin axle of at least one section less external diameter and the thick axle interval of at least one section great external diameter. Usually, the supporting shaft is a thick shaft which is close to one end of the connecting rod, and the outer diameter of the thick shaft is matched with the inner bore diameter of the screw sleeve. The structure is light in weight and low in cost.

Of course the utility model discloses also can be as required to the mounted position or with rotatory whether cross the position etc. carry out structural arrangement, preferred be in drive rod portion is equipped with coaxial holding ring, the external diameter of holding ring is greater than the axle sleeve or with the interior aperture after the screw rod sleeve combination, the holding ring is used for preventing the screw rod is twisted soon excessively and is surpassed the expansion tube. In addition, an inner hole of the screw sleeve close to one end of the expansion pipe is provided with an internal thread which extends to be matched with an internal conical screw hole of the expansion pipe, and the internal thread is matched with an external thread of the expansion rod part. The screw is screwed into the expansion pipe more smoothly.

The following detailed description and examples are provided to further illustrate the embodiments of the present invention, so as to make the technical solution of the present invention more specific and detailed. It is to be understood that the embodiments of the present invention are not limited by the illustrations and examples shown in the drawings, and any changes, combinations, etc. that do not depart from the spirit of the invention are intended to be equivalent and are intended to be included within the scope of the invention.

Drawings

FIG. 1: the structure diagram of the embodiment of the utility model;

FIG. 2: the embodiment of the utility model provides a sectional view;

FIG. 3: the schematic diagram of the external structure of the three screws in the embodiment of the utility model;

wherein: 11. the expansion device comprises a screw rod, 12, a bolt head, 111, a support shaft, 112, a connecting rod, 113, a positioning ring, 2, an expansion pipe, 21, an axial notch, 22, an expansion block, 3 and a screw sleeve.

Detailed Description

As shown in fig. 1-3, the embodiment of the present invention still includes bolt and expansion pipe 2, the bolt is composed of screw rod 11 and bolt head 12, screw rod 11 includes the expansion rod portion that leans on at the drive rod portion of bolt head 12 one end and the other end, this expansion rod portion is the screw rod 11 with external screw thread, expansion pipe 2 corresponds coaxial setting with expansion rod portion, expansion pipe 2 is equipped with the circular cone screw, the aperture of circular cone screw reduces gradually along the direction that screw rod 11 twists the expansion pipe portion, expansion pipe 2 is equipped with the axial incision, the axial incision is along the periphery equipartition of expansion pipe 2, divide expansion pipe 2 into the expansion piece that can radially expand, drive rod portion cover is equipped with the screw sleeve 3 that sets up with expansion pipe 2 an organic whole, the aperture is not less than the external diameter of whole screw rod 11 in screw sleeve 3, drive rod portion comprises connecting rod portion 112 that leans on bolt head one end and the back shaft 111 that leans on expansion rod portion one end, the biggest external diameter of this back shaft 111 is not less than the external diameter of expansion rod portion in this embodiment is more excellent, in addition, the external diameter of general case connecting rod 112 is less than the external diameter of expansion rod portion looks adaptation of expansion rod portion, in general, screw sleeve 3 and the back shaft 111 that leans on one end with the drive rod portion. The support shaft 111 of the drive rod part, which leans against one end of the expansion rod part, is composed of at least one section of thin shaft with smaller external diameter and at least one section of thick shaft with larger external diameter, wherein the thick shaft can be one or more, the external diameter is generally consistent, and the thin shaft with smaller external diameter can be an original part of the drive rod part; or lean on the thin axle that the one end of expansion rod portion is the less external diameter, lean on the thick axle that connecting rod one end is the great external diameter, promptly support shaft 111 can be no less than two and the external diameter is inconsistent, obviously the external diameter of the thick axle of above-mentioned and screw rod sleeve 3 internal bore diameter looks adaptation. That is, the embodiment actually includes several different screws 11 with support shafts 111. A coaxial positioning ring 113 for preventing the screw 11 from being excessively screwed to exceed the expansion pipe 2 is arranged between the connecting rod 112 and the supporting shaft 111 of the transmission rod part, the outer diameter of the positioning ring 113 is larger than the maximum outer diameter of the supporting shaft 111, an inner hole of the screw sleeve 3 close to one end of the expansion pipe 2 is provided with an internal thread which is matched with an internal conical screw hole of the expansion pipe 2 and extends all the way to match with an external thread of the expansion rod part.

Claims

1. The utility model provides an integral expansion bolts who fastens in wall, includes bolt and expansion pipe, the bolt comprises screw rod and bolt head, the screw rod is including leaning on the drive lever portion of bolt head one end and the expansion lever portion of the other end, expansion lever portion is the screw rod of external screw thread, the expansion pipe corresponds coaxial setting with expansion lever portion, the expansion pipe is equipped with the circular cone screw, the aperture of circular cone screw reduces gradually along the direction that the screw rod is twisted in the expansion pipe portion, the expansion pipe is equipped with the axial incision, the expansion block that can radially expand is cut apart out to the axial incision along the periphery equipartition of expansion pipe, its characterized in that: the screw sleeve is sleeved on the transmission rod part and integrated with the expansion pipe, the inner hole diameter of the screw sleeve is not smaller than the outer diameter of the whole screw, the transmission rod part is composed of a connecting rod leaning against one end of a bolt head and a supporting shaft leaning against one end of the expansion rod part, and the screw sleeve is matched with the maximum outer diameter of the supporting shaft leaning against one end of the expansion rod part of the transmission rod part.

2. The integral expansion bolt fastened in a wall according to claim 1, wherein: the transmission rod part is against the support shaft at one end of the expansion rod part and consists of at least one section of thin shaft with smaller outer diameter and at least one section of thick shaft with larger outer diameter at intervals.

3. An integral expansion bolt fastened in a wall according to claim 1 or 2, characterized in that: the driving rod part is provided with a coaxial positioning ring for preventing the screw from excessively screwing and exceeding the expansion pipe, the outer diameter of the positioning ring is larger than the inner aperture of the screw sleeve, an inner hole of the screw sleeve close to one end of the expansion pipe is provided with an inner thread and extends to be matched with a conical screw hole in the expansion pipe, and the inner thread is matched with an outer thread of the expansion rod part.