Internal expansion fixed rivet

Abstract

The utility model relates to the technical field of rivets, in particular to an internal expansion fixed rivet which comprises an end cover, a circular plate is rotatably connected to the lower end of the end cover, a rod body is slidably connected to the interior of the end cover in a penetrating mode, the circular plate is rotatably connected with the rod body in a penetrating and threaded mode, an annular groove is formed in the side wall of the rod body, and a locking block is rotatably connected to the end of the rod body. The side wall of the lower end of the locking block is obliquely arranged; a plurality of expansion blocks are distributed at the upper end of the base in an annular array mode. An operator slides the locking block, the expansion blocks and the base into a drilled hole formed in advance, the protruding block is manually rotated to enable the circular plate to rotate, the rod body drives the locking block to slide, the multiple expansion blocks are expanded to enable the expansion blocks to deform, and therefore an object is fixed to a designated position, and after the expansion blocks completely deform, the rod body is disconnected from the annular groove, and the object is fixed. And the redundant rod body part is removed, so that the rivet can be conveniently mounted, and meanwhile, the rivet can be mounted without using other tools.

Description

Technical Field

[0001] The utility model relates to the technical field of rivets, in particular to an internal expansion fixed rivet. Background Art

[0002] Internal expansion fixed rivets, also called expansion rivets or expansion nails, are a special type of fasteners. Their principle mainly uses the plastic deformation and mechanical principles of metal materials to achieve the fixation of the substrate. The application scenarios of expansion rivets are very wide, such as automobile manufacturing, construction industry, machinery manufacturing, aviation field, etc. In automobile manufacturing, expansion rivets can be used to reinforce and fix sheet metal parts such as wheel arches and door panels to enhance their structural strength. In the construction industry, expansion rivets are often used for the connection and fixation of steel structures, such as the installation of aluminum veneer curtain walls, roofing components, etc. In machinery manufacturing, expansion rivets can be used for the assembly of devices to enhance the stability and reliability of their structures. In the aviation field, expansion rivets have also been widely used as a reliable connector.

[0003] Existing metal rivets are prone to loosening in the drilled hole after long-term operation during use, resulting in an unstable rivet connection and a very short service life in a shaking environment. In addition, the rivet rod is prone to retreat, causing the expansion tube to be unable to resist the inner wall of the hole. Utility Model Content

[0004] The utility model aims to provide an internal expansion fixed rivet, which can facilitate the installation of the rivet and improve the stability of the rivet in use, so as to solve the problems of inconvenience in installing the rivet and poor stability in use in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An internal expansion fixed rivet comprises an end cover, the lower end of which is rotatably connected to a circular plate, a rod body is slidably connected to the inside of the end cover, the circular plate and the rod body are rotatably connected through a thread, the side wall of the rod body is provided with an annular groove, the end of the rod body is rotatably connected to a locking block, and the lower end side wall of the locking block is inclined; a base, the base is provided at the upper end of the end cover, a plurality of expansion blocks are distributed in a circular array on the upper end of the base, and the expansion blocks cooperate with the locking blocks.

[0007] Preferably, a protective pad is fixedly connected to the upper end of the end cover, the protective pad is made of rubber material, and a plurality of holes are arranged in a circular array on the upper end of the protective pad.

[0008] Preferably, two protrusions are symmetrically fixedly connected to the side wall of the circular plate, and the side walls of the two protrusions are both covered with rubber protective sleeves.

[0009] Preferably, a notch is provided inside the base, the notch is slidably connected with the rod body, and a clamping groove is provided on a side wall of the notch.

[0010] Preferably, a column is fixedly connected to the lower end of the locking block, a through slot is provided inside the column, the rod body is rotatably connected to the through slot, and the column is slidably connected to the notch.

[0011] Preferably, a clamping block is provided on the side wall of the column, the clamping block matches with the clamping slot, and both the clamping block and the clamping slot are arranged in an annular shape.

[0012] Compared with the prior art, the advantages of the utility model are:

[0013] 1. The operator slides the locking block, expansion block and base into the pre-drilled hole, and at the same time, the side wall of the protective pad fits with the side wall of the object. The convex block is manually rotated to rotate the circular plate, so that the rod body and the end cover slide through. At the same time, the rod body drives the locking block to slide, and the multiple expansion blocks are stretched to deform the expansion blocks, thereby fixing the object in the specified position. When the locking block slides a certain distance and the expansion block is completely deformed, the rod body is disconnected from the ring groove, and the excess rod body is removed, so as to facilitate the installation of the rivet, and no other tools are needed to install the rivet.

[0014] 2. After the rod pulls the locking block to slide a certain distance, the column slides into the slot. During the sliding of the column into the slot, the block contacts the side wall of the slot and deforms. When the block contacts the slot, the block automatically recovers through its own elasticity, so that the side wall of the block fits with the inner wall of the slot, thereby limiting the locking block and preventing the locking block from loosening due to vibration, making it impossible to lock the expansion block, and improving the stability of the rivet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the external structure of an internal expansion fixed rivet proposed by the utility model when viewed from above.

[0016] Figure 2 The figure is a schematic diagram of the external structure of an internal expansion fixed rivet proposed by the utility model when viewed from above.

[0017] Figure 3 The utility model is a schematic diagram of a side cross-sectional structure of an internal expansion fixed rivet.

[0018] Figure 4 The utility model is a front cross-sectional structural schematic diagram of an internal expansion fixed rivet.

[0019] In the figure: 1 end cover, 2 protective pad, 3 circular plate, 4 protrusion, 5 rod body, 6 ring groove, 7 base, 8 expansion block, 9 notch, 10 slot, 11 locking block, 12 column, 13 block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 , an internal expansion fixed rivet, comprising an end cap 1, a circular plate 3 is rotatably connected to the lower end of the end cap 1, a rod body 5 is slidably connected to the inside of the end cap 1, the circular plate 3 and the rod body 5 are rotatably connected through a thread, a ring groove 6 is arranged on the side wall of the rod body 5, a locking block 11 is rotatably connected to the end of the rod body 5, and the lower end side wall of the locking block 11 is inclined; a base 7, the base 7 is arranged on the upper end of the end cap 1, and a plurality of expansion blocks 8 are distributed in an annular array on the upper end of the base 7, and the expansion block 8 cooperates with the locking block 11, and the operator slides the locking block 11, the expansion block 8 and the base 7 The rod 5 is moved to the inside of the previously opened drilled hole, and the side wall of the end cover 1 is fitted with the side wall of the object. Then the operator rotates the circular plate 3, so that the rod body 5 and the end cover 1 slide through, and the rod body 5 drives the locking block 11 to slide, and the multiple expansion blocks 8 are stretched to make the expansion block 8 deform, so as to fix the object in the specified position. When the locking block 11 slides a certain distance and the expansion block 8 is completely deformed, the rod body 5 is disconnected from the annular groove 6, and the excess rod body 5 is removed, so as to facilitate the installation of the rivet without using other tools to install the rivet.

[0022] A protective pad 2 is fixedly connected to the upper end of the end cover 1. The protective pad 2 is made of rubber. A plurality of holes are arranged in a circular array on the upper end of the protective pad 2. When the side wall of the end cover 1 fits against the side wall of the object, the side wall of the object is protected by the protective pad 2 to avoid scratches on the surface of the object.

[0023] Two protrusions 4 are symmetrically fixedly connected to the side wall of the circular plate 3. The side walls of the two protrusions 4 are both covered with rubber protective sleeves. The circular plate 3 is rotated by manually rotating the protrusions 4, and the operator's hands are protected by the protective sleeves.

[0024] A notch 9 is provided inside the base 7 , and the notch 9 is slidably connected with the rod body 5 . A clamping groove 10 is provided on the side wall of the notch 9 , and the notch 9 is circular.

[0025] The lower end of the locking block 11 is fixedly connected to a column 12, a through slot is provided inside the column 12, the rod 5 is rotatably connected to the through slot, the column 12 is slidably connected to the slot 9, and after the rod 5 pulls the locking block 11 to slide a certain distance, the column 12 slides into the slot 9.

[0026] A card block 13 is provided on the side wall of the column 12, and the card block 13 cooperates with the card slot 10. The card block 13 and the card slot 10 are both arranged in a ring shape. The card block 13 adopts an elastic block. In the process of the column 12 sliding into the slot 9, the card block 13 contacts the side wall of the slot 9 and deforms. When the card block 13 contacts the slot 10, the card block 13 automatically recovers through its own elasticity, so that the side wall of the card block 13 fits with the inner wall of the slot 10, thereby limiting the locking block 11 to prevent the locking block 11 from loosening and failing to lock the expansion block 8.

[0027] In the utility model, the operator slides the locking block 11, the expansion block 8 and the base 7 into the pre-opened drilled hole, and at the same time, the side wall of the protective pad 2 fits with the side wall of the object, and manually rotates the protrusion 4 to rotate the circular plate 3, so that the rod body 5 and the end cover 1 slide through, and at the same time, the rod body 5 drives the locking block 11 to slide, and the multiple expansion blocks 8 are stretched to make the expansion blocks 8 deform, thereby fixing the object in the specified position. When the locking block 11 slides a certain distance and the expansion block 8 is completely deformed, the rod body 5 is disconnected from the annular groove 6, and the excess rod body 5 is removed, thereby facilitating the installation of the rivet.

[0028] After the rod body 5 pulls the locking block 11 to slide a certain distance, the column 12 slides into the slot 9. During the process of the column 12 sliding into the slot 9, the block 13 contacts the side wall of the slot 9 and deforms. When the block 13 contacts the slot 10, the block 13 automatically recovers through its own elasticity, so that the side wall of the block 13 fits with the inner wall of the slot 10, thereby limiting the locking block 11.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An internal expansion fixed rivet, characterized in that: include An end cover (1), wherein a circular plate (3) is rotatably connected to the lower end of the end cover (1), a rod body (5) is slidably connected to the interior of the end cover (1), the circular plate (3) and the rod body (5) are rotatably connected by a thread, a side wall of the rod body (5) is provided with an annular groove (6), and a locking block (11) is rotatably connected to the end of the rod body (5), and the lower end side wall of the locking block (11) is inclined; A base (7), wherein the base (7) is arranged at the upper end of the end cover (1), and a plurality of expansion blocks (8) are arranged in a circular array at the upper end of the base (7), and the expansion blocks (8) cooperate with the locking blocks (11).

2. The internal expansion fixed rivet according to claim 1, characterized in that: The upper end of the end cover (1) is fixedly connected to a protective pad (2), the protective pad (2) is made of rubber material, and a plurality of holes are arranged in a circular array at the upper end of the protective pad (2).

3. The internal expansion fixed rivet according to claim 1, characterized in that: The side wall of the circular plate (3) is symmetrically fixedly connected with two protrusions (4), and the side walls of the two protrusions (4) are both covered with rubber protective sleeves.

4. The internal expansion fixed rivet according to claim 1, characterized in that: A notch (9) is provided inside the base (7), the notch (9) is slidably connected to the rod body (5), and a clamping groove (10) is provided on the side wall of the notch (9).

5. The internal expansion fixed rivet according to claim 1, characterized in that: The locking block (11) is fixedly connected to a column (12) at its lower end. A through slot is provided inside the column (12). The rod (5) is rotatably connected to the through slot. The column (12) is slidably connected to the notch (9).

6. The internal expansion fixing rivet according to claim 5, characterized in that: A clamping block (13) is provided on the side wall of the column (12), the clamping block (13) cooperates with the clamping slot (10), and the clamping block (13) and the clamping slot (10) are both arranged in an annular shape.

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