CN210715514U

CN210715514U - Fastening connecting piece

Info

Publication number: CN210715514U
Application number: CN201920842682.9U
Authority: CN
Inventors: 蔡建峰
Original assignee: Suzhou Antaury Precision Parts Co ltd
Current assignee: Suzhou Antaury Precision Parts Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-06-09
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a fastening connection spare, it relates to mechanical basic component field, and it is high to mounting hole required precision when aiming at solving current bush installation, leads to the big problem of the processing degree of difficulty. Its technical scheme main points include the bolt, the bolt includes bolt head, flange and screw rod, the cover is equipped with bush, its characterized in that on the screw rod: the side wall of the bushing is provided with abdication bar holes, and the length of the abdication bar holes is the same as the axial length of the bushing, so that the bushing is disconnected; the side wall of the bushing is provided with a deformation hole, and the deformation hole and the abdication bar hole are oppositely arranged; the bushing is provided with a plurality of punching points, namely, a plurality of concave parts are formed on the outer side wall of the bushing, and a plurality of convex parts contacted with the screw rod are formed on the inner side wall of the bushing. The utility model discloses can reduce the required precision to the mounting hole, and then reduce the processing degree of difficulty, improve the installation effectiveness.

Description

Fastening connecting piece

Technical Field

The utility model relates to a machinery foundation field, more specifically says that it relates to a fastening connection spare.

Background

Fastening connectors are widely used for connections and applications between materials of different properties. In order to make the connection effect of the fastening connector better, a bushing is usually sleeved on the screw rod of the fastening connector, and the bushing is usually installed on the screw rod in a matching manner before the fastening connector leaves a factory, so that the fastening connector is more convenient to use at a later stage.

The bush can inlay in the mounting hole when connecting, and in order to guarantee that the installation back bush can not become flexible, the required precision to the mounting hole is very high, has increased the processing degree of difficulty.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a fastening connection spare, it has the advantage that reduces the mounting hole processing degree of difficulty.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a fastening connecting piece comprises a bolt, wherein the bolt comprises a bolt head, a flange and a screw rod, a bushing is sleeved on the screw rod, a abdication bar hole is formed in the side wall of the bushing, the length of the abdication bar hole is the same as the axial length of the bushing, and the bushing is disconnected; the side wall of the bushing is provided with a deformation hole, and the deformation hole and the abdication bar hole are oppositely arranged; the bushing is provided with a plurality of punching points, namely, a plurality of concave parts are formed on the outer side wall of the bushing, and a plurality of convex parts contacted with the screw rod are formed on the inner side wall of the bushing.

Furthermore, a fastening ring in contact with the flange is sleeved on the screw rod, and a clamping groove matched with the fastening ring is formed in the end part of the bushing; the inner diameter of the fastening ring is in interference fit with the outer diameter of the screw rod, and the outer diameter of the fastening ring is in clearance fit with the inner diameter of the clamping groove.

Further, the cross section of the fastening ring is circular.

Further, a gap is formed between the bushing and the flange.

To sum up, the utility model discloses following beneficial effect has:

1. the abdication bar holes and the deformation holes are adopted, so that the precision requirement on the mounting holes can be reduced, the processing difficulty is further reduced, and the mounting efficiency is improved;

2. the convex part is adopted, so that the effect of preventing the bolt from being separated from the bush during transportation is achieved;

3. by adopting the fastening ring, on one hand, the fastening performance of the connection between the bush and the mounting hole can be improved, on the other hand, the fastening performance of the connection between the bush and the bolt can be improved, and the looseness of the bush and the bolt can be prevented.

Drawings

FIG. 1 is a first schematic view of a fastening connector according to embodiment 1;

FIG. 2 is a second schematic structural view of a fastening connector according to embodiment 1;

FIG. 3 is a cross-sectional view of a fastening connector of embodiment 1;

FIG. 4 is a cross-sectional view of a fastening connector of embodiment 2;

fig. 5 is an enlarged schematic view of a portion a in fig. 4.

In the figure: 11. a bolt head; 12. a flange; 13. a screw; 2. a bushing; 21. a abdication bar hole; 22. a deformation hole; 23. a recessed portion; 24. a boss portion; 25. a card slot; 3. and (6) fastening the ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example 1:

a fastening connecting piece, referring to fig. 1 to 3, comprises a bolt, wherein the bolt comprises a bolt head 11, a flange 12 and a screw 13, a bushing 2 is sleeved on the screw 13, a abdicating bar hole 21 is formed in the side wall of the bushing 2, the length of the abdicating bar hole 21 is the same as the axial length of the bushing 2, and the bushing 2 is in a disconnected arrangement; the side wall of the bush 2 is provided with a deformation hole 22, and the deformation hole 22 and the abdication bar hole 21 are arranged oppositely; the lining 2 is provided with a plurality of punching points, namely a plurality of concave parts 23 are formed on the outer side wall of the lining 2, and a plurality of convex parts 24 contacted with the screw 13 are formed on the inner side wall of the lining; the convex part 24 is contacted with the screw 13, so that the lining 2 and the bolt can be prevented from being separated after being bumped in the transportation process.

The working principle is as follows:

the abdication bar holes 21 enable the bush 2 to be arranged in a disconnected mode, and the bush 2 can elastically deform by matching with the deformation holes 22 opposite to the abdication bar holes 21; in pressing back embedding mounting hole with bush 2 during the installation, then release elastic bush 2 can with mounting hole fastening connection to can reduce the required precision to the mounting hole, and then reduce the processing degree of difficulty.

Example 2:

a fastening connector, referring to fig. 4 and 5, based on embodiment 1, the present embodiment is different from embodiment 1 in that: the screw 13 is sleeved with a fastening ring 3 which is contacted with the flange 12, the section of the fastening ring 3 is circular, and the end part of the lining 2 is provided with a clamping groove 25 which is matched with the fastening ring 3; the inner diameter of the fastening ring 3 is in interference fit with the outer diameter of the screw 13, and the outer diameter of the fastening ring is in clearance fit with the inner diameter of the clamping groove 25; the bush 2 and the flange 12 are arranged with a gap therebetween, and the material of the fastening ring 3 in this embodiment is aluminum.

The working principle is as follows:

after the bolt is tightly connected with the lining 2, the fastening ring 3 deforms after being extruded and contacts with the inner side wall of the clamping groove 25, on one hand, the fastening performance of the lining 2 and the installation hole can be improved, on the other hand, the fastening performance of the lining 2 and the bolt can be improved, and the looseness of the lining 2 and the bolt can be prevented.

Claims

1. The utility model provides a fastening and connecting piece, includes the bolt, the bolt includes bolt head (11), flange (12) and screw rod (13), the cover is equipped with bush (2) on screw rod (13), its characterized in that: the side wall of the bushing (2) is provided with abdication bar holes (21), the length of the abdication bar holes (21) is the same as the axial length of the bushing (2), so that the bushing (2) is disconnected; the side wall of the bushing (2) is provided with a deformation hole (22), and the deformation hole (22) and the abdication bar hole (21) are arranged oppositely; the bushing (2) is provided with a plurality of punching points, namely a plurality of concave parts (23) are formed on the outer side wall of the bushing (2), and a plurality of convex parts (24) contacted with the screw (13) are formed on the inner side wall of the bushing.

2. The fastening connection of claim 1, wherein: the screw (13) is sleeved with a fastening ring (3) which is in contact with the flange (12), and the end part of the bushing (2) is provided with a clamping groove (25) which is matched with the fastening ring (3); the inner diameter of the fastening ring (3) is in interference fit with the outer diameter of the screw rod (13), and the outer diameter of the fastening ring is in clearance fit with the inner diameter of the clamping groove (25).

3. The fastening connection of claim 2, wherein: the section of the fastening ring (3) is circular.

4. The fastening connection of claim 2, wherein: the bush (2) and the flange (12) are arranged in a clearance mode.