CN209398695U - A gasket type anti-slip expansion bolt - Google Patents

Abstract

The utility model discloses a washer type anti-rolling expansion bolt, which comprises a bolt, a casing sleeve, a gasket, a spring washer and a nut which are sequentially sleeved on the bolt from bottom to top. The expansion head at the end, the top of the screw rod is provided with external threads, the center of the sleeve is provided with a first through hole, the top and bottom of the sleeve are respectively provided with protrusions and slices, the outer wall of the sleeve There are several first grooves extending from the center to the bottom through the pipe wall, and the gasket is provided with second grooves corresponding to the protrusions, which can prevent the casing from In the process of screwing in the bolts in the early stage, the bottom of the casing is expanded through the expansion head, and the tip of the bottom of the casing is used to penetrate the wall of the preset hole to prevent the casing from following along during the screwing in of the bolts in the later stage. Follow the rotation until the casing is fully expanded.

Description

A gasket type anti-slip expansion bolt

【Technical field】

The utility model relates to the technical field of expansion bolts, in particular to the technical field of a washer-type anti-rolling expansion bolt.

【Background technique】

At present, in the installation process of some equipment, it is necessary to use expansion bolts to fix the equipment body or other structural accessories on the ground or the wall. The usual connection method is to pre-drill holes on the ground or wall, then put in sleeves and bolts, and then fix them with gaskets. However, when drilling holes on the ground or wall, if the material of the ground or wall is relatively loose or the diameter of the drill used for drilling is too large, a clearance fit will be formed between the preset hole and the expansion sleeve, and the screw will be tightened during the process of tightening the screw. In the process, there is a problem that the bushing rotates with the rotation of the bolt, which leads to unstable installation of the equipment or device.

【Content of utility model】

The purpose of the utility model is to solve the problems in the prior art, and propose a gasket type anti-coil rotation expansion bolt, which can effectively prevent the casing from co-rotation.

In order to achieve the above purpose, the utility model proposes a gasket type anti-rotation expansion bolt, which includes a bolt, a sleeve, a gasket, a spring washer and a nut that are sequentially sleeved on the bolt from bottom to top, and the bolt includes The screw rod and the expansion head located at the bottom end of the screw rod, the top end of the screw rod is provided with external threads, the center of the sleeve is provided with a first through hole, the top and bottom ends of the sleeve are respectively provided with protrusions and slices, so The outer wall of the casing is provided with several first grooves extending from the center to the bottom and penetrating the pipe wall, and the gasket is provided with second grooves corresponding to the protrusions.

Preferably, the diameter of the screw is smaller than the inner diameter of the first through hole.

Preferably, the screw and the expansion head are integrally structured, the expansion head is in the shape of a truncated cone, and when the expansion head enters the sleeve, the sleeve can expand along the first groove.

Preferably, the outer surface of the protrusion is provided with rough texture.

Preferably, the slice is hollowed out in the shape of a rounded truncated cone and is arranged around the bottom end of the casing, the top of the slice is provided with a tip, and the maximum outer diameter of the slice is smaller than the maximum outer diameter of the expansion head.

Preferably, a second through hole is provided in the center of the gasket, and several threaded holes are provided on the outer side of the gasket surrounding the second through hole.

Preferably, the bottom surface of the gasket is provided with rough textures.

Beneficial effects of the utility model: when the preset hole diameter is large or the foundation wall structure is loose, the utility model can prevent the casing from following along with the screw-in process of the bolts in the early stage through the cooperation of the casing and the spacer. Expand the bottom end of the sleeve through the expansion head, and use the tip of the bottom end of the sleeve to pierce the wall of the preset hole to prevent the sleeve from rotating during the screw-in process of the bolt until the sleeve is completely expanded.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is a front view of a gasket type anti-rolling expansion bolt of the present invention;

Fig. 2 is a front view of a casing of a gasket-type anti-rolling expansion bolt of the present invention;

Fig. 3 is a top view of a casing of a gasket type anti-rolling expansion bolt of the present invention;

Fig. 4 is a bottom view of a gasket of a gasket type anti-rolling expansion bolt of the present invention;

Fig. 5 is a front view of a gasket type anti-rotation expansion bolt of the utility model;

In the figure: 1-bolt, 11-screw, 111-external thread, 12-expansion head, 2-sleeve, 21-protrusion, 22-first groove, 23-section, 231-tip, 24-first Through hole, 3-washer, 31-second groove, 32-second through hole, 33-threaded hole, 4-spring washer and 5-nut.

【Detailed ways】

Referring to Fig. 1 to Fig. 5, the utility model is a gasket type anti-rotation expansion bolt, including a bolt 1 and a casing 2, a gasket 3, a spring washer 4 and a nut 5 which are set on the bolt 1 sequentially from bottom to top. , the bolt 1 includes a screw 11 and an expansion head 12 located at the bottom of the screw 11, the top of the screw 11 is provided with an external thread 111, the center of the sleeve 2 is provided with a first through hole 24, and the sleeve 2 The top and bottom of 2 are respectively provided with protrusions 21 and slices 23, and the outer wall of the sleeve 2 is provided with several first grooves 22 extending from the center to the bottom of the pipe wall, and the gasket 3 is provided with There is a second groove 31 corresponding to the protrusion 21, the diameter of the screw 11 is smaller than the inner diameter of the first through hole 24, the screw 11 and the expansion head 12 are integrally structured, and the expansion head 12 is in the shape of a truncated cone. When the expansion head 12 enters the sleeve 2, the sleeve 2 can expand along the first groove 22, the outer surface of the protrusion 21 is provided with rough lines, and the slice 23 is hollowed out in the shape of a rounded truncated cone and Surrounding the bottom end of the casing 2, the top of the slice 23 is provided with a tip 231, the maximum outer diameter of the slice 23 is smaller than the maximum outer diameter of the expansion head 12, and the center of the gasket 4 is provided with a second There are two through holes 32 , and several threaded holes 33 are provided on the outside of the gasket 4 surrounding the second through hole 32 , and the bottom surface of the gasket 4 is provided with rough textures.

The working process of the utility model:

In the working process of a gasket type anti-rolling expansion bolt of the utility model, firstly, the through hole of the part to be fixed is aligned with the preset hole on the ground or the wall, and then the bolt 1 covered with the casing 2 is expanded. The head 12 is inserted into the preset hole in a downward direction, and the side of the sleeve 2 with the slice 23 is close to the expansion head 12 . Then the gasket 3 , the spring washer 4 and the nut 5 are sequentially passed through the bolt 1 and the protrusion 21 at the top of the sleeve 2 is inserted into the second groove 31 at the bottom of the gasket 3 . Subsequently, the nut 5 is tightened so that the bolt 1 is continuously rotated upward until the expansion head 12 squeezes into the first through hole 24 of the sleeve 2, so that the sleeve 2 expands along the first groove 22, and the sleeve 2 During the expansion process, the tip 231 of the slice 23 gradually penetrates into the wall of the preset hole. The rough texture on the outside of the protrusion 21 can prevent the protrusion 21 from coming out of the second groove 31, the rough texture on the bottom surface of the gasket 3 increases the friction between the gasket 3 and the part to be fixed, and the diameter of the screw rod 11 is smaller than that of the first groove 31. The inner diameter of the through hole 24 reduces the friction between the screw rod 11 and the casing 2, and prevents the casing 2 and the washer 3 from following the rotation of the bolt 1 before the tip 231 penetrates the wall of the preset hole. follow turn. If the surface of the part to be fixed is relatively smooth, several screws can pass through the third threaded hole 33 of the spacer 3 to fix the spacer 3 on the part to be fixed and the lower wall. After the expansion bolt is installed, it can be taken out again. screw.

When the preset hole diameter is large or the foundation wall structure is loose, the utility model can prevent the casing from following the rotation during the screw-in process of the bolts in the early stage through the cooperation of the casing and the gasket, and make the bottom of the casing through the expansion head Use the tip of the bottom end of the casing to pierce the wall of the pre-set hole to prevent the casing from rotating with the bolts in the later stage until the casing is completely expanded.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (7)

1. a kind of anti-transfer expansion bolt of gasket-type, it is characterised in that: be sequentially sleeved at bolt including bolt (1) and from bottom to up (1) casing (2), gasket (3), spring washer (4) and nut (5) on, the bolt (1) include screw rod (11) and be located at spiral shell The top of the expansion-head (12) of bar (11) bottom end, the screw rod (11) is equipped with external screw thread (111), and the center of described sleeve pipe (2) is set Have first through hole (24), the top and bottom end of described sleeve pipe (2) are respectively equipped with raised (21) and slice (23), described sleeve pipe (2) Outer wall is equipped with several from the first groove (22) through tube wall for extending medially to bottom end, the gasket (3) equipped with Raised (21) corresponding second groove (31).

2. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the diameter of the screw rod (11) Less than the internal diameter of first through hole (24).

3. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the screw rod (11) and expansion Head (12) is structure as a whole, and the expansion-head (12) is truncated cone-shaped, and whens expansion-head (12) sleeve pipe (2) can make casing (2) along the first groove (22) spreading.

4. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the outside of the protrusion (21) Surface is equipped with coarse lines.

5. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the slice (23) is to engrave The top of the reverse frustoconic of sky and the bottom end for being circumferentially positioned at casing (2), the slice (23) is equipped with tip (231), described Slice (23) maximum outside diameter be less than expansion-head (12) maximum outside diameter.

6. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the center of the gasket (3) Equipped with the second through-hole (32), several threaded holes (33) are additionally provided on the outside of the second through-hole (32) on the gasket (3).

7. a kind of anti-transfer expansion bolt of gasket-type as described in claim 1, it is characterised in that: the bottom side of the gasket (3) Surface is equipped with coarse lines.