CN207728700U - A kind of T-bolt with circular arc - Google Patents

Abstract

The utility model discloses a kind of T-bolts with circular arc, are related to steel pipe type steel railing securing member field, its key points of the technical solution are that：Surface close with stud on the bolt head of T-bolt is placed up to the arcwall face of protrusion, and one layer of rubber layer is set on arcwall face, the rubber layer coats entire arcwall face.In this way, when T-bolt fixes steel pipe, since arcwall face is inconsistent with steel pipe inner wall, transfer is less likely to occur T-bolt when installing steel pipe, meanwhile rubber layer can increase the frictional force of T-bolt and steel pipe inner wall, and T-bolt and steel pipe inner wall is made to be bonded closer.

Description

A kind of T-bolt with circular arc

Technical field

The utility model is related to steel pipe type steel railing securing member field, more particularly to a kind of T-bolts with circular arc.

Background technology

T-bolt is commonly used in the installation of the steel railing of steel pipe form to be fixed.However, at the scene in installation process, Bolt is easy and then nut rotation, on the one hand inconvenient operating personnel's installation, after on the other hand installation is complete, due to general T type Bolt head only has both ends to be contacted with steel pipe, and connection relation is also not secured enough.

Currently, the Chinese patent of Publication No. CN204921606U discloses a kind of T-bolt being easily installed, it includes Bolt head, screw rod and thread segment, two angles on a diagonal line of bolt head are designed to arc surface, the rear and front end of bolt head Plane, when going to certain position, can the non-threaded portion on screw rod local screens or be put into gasket carry out it is next The fastening of step.

Although this T-bolt facilitates tool that bolt head is put into nut or loose bolts, but apply to steel pipe When connection area, install steel pipe when bolt still can transfer, be unfavorable for operating personnel operation, while bolt and steel pipe connection close System is comparatively also not secured enough.

Utility model content

The purpose of this utility model is to provide a kind of T-bolt with circular arc, its advantage is that：In the steel railing of steel pipe form During in-site installation, transfer will not occur for T-bolt, be conveniently operated personnel's operation.

The above-mentioned technical purpose of the utility model technical scheme is that：

A kind of T-bolt with circular arc, including bolt head and screwed stud, it is characterised in that：The bolt head It is the arc surface of protrusion close to the surface of stud, rubber layer is fixedly connected on the arc surface, the rubber layer cladding is entire Arc surface.

By using above-mentioned technical proposal, arc surface is in contact with steel pipe inner wall, and when installation can when screwing on certain power Realize self-locking, transfer just will not occur for T-bolt, and rubber layer is arranged on arc surface can increase rubbing for arc surface and steel pipe inner wall Wiping power makes T-bolt be bonded with steel pipe inner wall closer.

Further setting：The arc surface is identical as the curved surface radian of the inner wall of installed steel pipe.

By using above-mentioned technical proposal, ensures that arc surface can be fitted tightly over steel pipe inner wall, make in arc surface and steel pipe The frictional force bigger of wall, while ensureing that T-bolt is more stablized in steel pipe.

Further setting：The rubber layer is tightly connected with stud.

By using above-mentioned technical proposal, rubber layer is with steel pipe inner wall since the effect of atmospheric pressure is bonded closer.

Further setting：The thickness of the rubber layer is less than or equal to 2.5mm.

By using above-mentioned technical proposal, since rubber layer is elastic layer, ensure that its thickness is not too large to prevent T-type spiral shell Bolt, there are excessive elastic force, causes to connect insecure with steel pipe inner wall.

Further setting：The bolt head is in cuboid, and multiple grooves, institute are offered on the top surface opposite with arc surface It states and is provided with spring and the conflict bar for contradicting steel pipe inner wall in groove, the spring one end is connected with bottom portion of groove, another End is connected with bar is contradicted.

By using above-mentioned technical proposal, contradicting bar can contradict on steel pipe inner wall, so that T-bolt and steel pipe is bonded more steady Gu while also further increasing frictional force and prevent T-bolt transfer.

Further setting：The described conflict one end of bar far from spring is provided with Anti-slip cover.

By using above-mentioned technical proposal, Anti-slip cover ensures that contradicting bar steadily contradicts on steel pipe, prevents conflict bar from existing Sliding causes to be bolted unstable on steel pipe.

Further setting：Multiple grooves are surrounded on the central symmetry arrangement of top surface.

By using above-mentioned technical proposal, ensure to contradict the central symmetry arrangement that bar is located at T-bolt upper surface, then supporting The stress point or its resultant force of feeler lever and steel pipe inner wall also are located at the center of T-bolt upper surface, prevent T-bolt due to stress not Balance leads to connection built on the sand.

Further setting：The conflict bar is identical as groove shapes and its unilateral fit clearance is less than or equal to 0.1mm.

By using above-mentioned technical proposal, ensure that contradict bar is relatively fixed in groove, contradicting bar will not shift, really Protect the mounting stability of T-bolt.

In conclusion the utility model has the advantages that：

1. by setting T-bolt to close to the surface of stud the arc surface of protrusion, when steel pipe is installed at the scene, circular arc Face fits with steel pipe inner wall, and self-locking is formed after T-bolt is tightened, and prevents T-bolt transfer.

2. by the way that rubber layer is arranged on arc surface, increase the frictional force between bolt and steel pipe.

3. by opening up groove on the top surface opposite with arc surface, the gag lever post with spring, limit are fixed in groove Bar can be contradicted in steel pipe inner wall, increase the pressure between T-bolt and steel pipe to increase frictional force, while making T-bolt Connection between steel pipe is more firm.

Description of the drawings

Fig. 1 is the structural schematic diagram of embodiment 1；

Fig. 2 is the fiting relation figure of T-bolt and steel pipe in embodiment 1；

Fig. 3 is the structural schematic diagram of embodiment 2；

Fig. 4 is the fiting relation figure of T-bolt and steel pipe in embodiment 2；

Fig. 5 is the sectional view for reacting inside grooves structure in embodiment 2；

In figure, 1, bolt head；11, arc surface；12, rubber layer；13, top surface；131, groove；132, spring；133, it contradicts Bar；134, Anti-slip cover；2, stud；3, steel pipe.

Specific implementation mode

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment 1：

As shown in Figure 1, a kind of T-bolt with circular arc, including a bolt head 1 and a table perpendicular to bolt head 1 Face and the stud 2 being set at the centre of surface, the stud 2 are threaded and are wholely set with bolt head 1.

As depicted in figs. 1 and 2, the surface of the bolt head 1 contacted with stud 2 is arc surface 11, and remaining surface forms one Cuboid.The radian of arc surface 11 is identical as the radian of the inner wall of installed steel pipe 3, to ensure that T-bolt and 3 inner wall of steel pipe are tight Closely connected conjunction.In 3 in-site installation of steel pipe, after screwing certain force, self-locking is formed between T-bolt and steel pipe 3, effectively avoids T-type Bolt transfer.

One layer of rubber layer 12 is fixed on arcwall face, the rubber layer 12 coats entire arc surface 11, and arc surface 11 It is tightly connected between stud 2.After T-bolt is tightened on 3 inner wall of steel pipe, rubber layer 12 is fitted closely with 3 inner wall of steel pipe, T-bolt is pressed on 3 inner wall of steel pipe using atmospheric pressure, keeps connection more firm, while rubber layer 12 can also increase circular arc Frictional force between 3 inner wall of face 11 and steel pipe, further prevents T-bolt transfer.In addition, the thickness of rubber layer 12 is less than or equal to 2.5mm is not too large to ensure its thickness, and preventing T-bolt, there are excessive elastic forces with 3 inner wall of steel pipe, lead to connection loosely Gu.

Specific implementation process：The inner wall that rubber layer 12 on the arc surface 11 of T-bolt is aligned to steel pipe 3 inserts stud 2 Enter mounting hole, ensures to screw on nut after rubber layer 12 is bonded with 3 inner wall of steel pipe.Due to the radian of arc surface 11 and 3 inner wall of steel pipe Identical, when nut is screwed on there are when certain pressure between steel pipe 3, T-bolt is close to 3 inner wall of steel pipe and relies on frictional force shape At self-locking, simultaneously because rubber layer 12 is tightly connected with stud 2, it can rely on atmospheric pressure that T-bolt is made to be pressed in 3 inner wall of steel pipe On, so that T-bolt is bonded with 3 inner wall of steel pipe even closer, further avoids T-bolt transfer.

Embodiment 2：

As shown in Figure 3 and Figure 5, difference from Example 1 is on top surface 13 opposite with arc surface 11 on T-bolt Multiple grooves 131 are offered, the groove 131 is located at the center of top surface 13 or the central symmetry about top surface 13 is arranged, to protect Card contradicts the stress point of bar 133 and 3 inner wall of steel pipe or its resultant force also is located at the center of T-bolt top surface 13, prevent T-bolt by Lead to connection built on the sand in force unbalance.The quantity of the present embodiment groove 131 is preferably 4.

As shown in Figure 4 and Figure 5,131 bottom of groove is fixedly connected with spring 132, and 132 other end of spring is fixedly connected with one Bar 133 is contradicted, contradicting bar 133 can contradict in the other side of 3 inner wall of steel pipe, and one end that conflict bar 133 is contacted with 3 inner wall of steel pipe is also Equipped with Anti-slip cover 134, prevent from contradicting the connective stability that bar 133 slides influence T-bolt on 3 inner wall of steel pipe.

To ensure to contradict stability of the bar 133 in groove 131, contradicts 133 shape of bar and the shape of groove 131 keeps one It causes and its unilateral fit clearance is less than or equal to 0.1mm.

The T-bolt with circular arc described in the present embodiment is particularly suitable for the smaller steel pipe 3 of connection internal diameter.

The above embodiments are only the explanation to the utility model, are not limitations of the present invention, ability Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but As long as all being protected by Patent Law in the right of the utility model.

Claims (8)

1. a kind of T-bolt with circular arc, including bolt head（1）With screwed stud（2）, it is characterised in that：The spiral shell Bolt head（1）Close to stud（2）Surface be protrusion arc surface（11）, the arc surface（11）On be fixedly connected with rubber layer （12）, the rubber layer（12）Coat entire arc surface（11）.

2. a kind of T-bolt with circular arc according to claim 1, it is characterised in that：The arc surface（11）With pacified Steel loading pipe（3）Inner wall curved surface radian it is identical.

3. a kind of T-bolt with circular arc according to claim 2, it is characterised in that：The rubber layer（12）With stud （2）It is tightly connected.

4. a kind of T-bolt with circular arc according to claim 1, it is characterised in that：The rubber layer（12）Thickness Less than or equal to 2.5mm.

5. a kind of T-bolt with circular arc according to claim 1, it is characterised in that：The bolt head（1）In rectangular Body, with arc surface（11）Opposite top surface（13）On offer multiple grooves（131）, the groove（131）Inside it is provided with bullet Spring（132）With for contradicting steel pipe（3）The conflict bar of inner wall（133）, the spring（132）One end and groove（131）Bottom is solid Even, the other end and conflict bar（133）It is connected.

6. a kind of T-bolt with circular arc according to claim 5, it is characterised in that：The conflict bar（133）Far from bullet Spring（132）One end be provided with Anti-slip cover（134）.

7. a kind of T-bolt with circular arc according to claim 6, it is characterised in that：Multiple grooves（131）It surround In top surface（13）Central symmetry arrangement.

8. a kind of T-bolt with circular arc according to claim 7, it is characterised in that：The conflict bar（133）With groove （131）Shape is identical and its unilateral fit clearance is less than or equal to 0.1mm.