CN213145030U

CN213145030U - Dual check bolt

Info

Publication number: CN213145030U
Application number: CN202021529754.3U
Authority: CN
Inventors: 万屹峰; 熊强; 魏锋
Original assignee: Jiangsu Hongcheng Waterworks Environmental Protection Co ltd
Current assignee: Jiangsu Hongcheng Waterworks Environmental Protection Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-05-07
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to a dual check bolt aims at providing a immersible pump and carries out the dual check bolt fixed to the impeller center pin, including big bolt, gasket, expander and pull rod bolt. The gasket cover is in the big bolt, big bolt center department is equipped with a through-hole, install in the through-hole pull rod bolt, just the terminal installation of pull rod bolt the expander, and pass through pull rod bolt stimulates the expander expansion extrusion is in on the center pin shaft hole inner wall the utility model has the advantages of the device is simple and convenient to use.

Description

Dual check bolt

Technical Field

The utility model relates to a bolt locking technical field especially relates to a dual check bolt.

Background

The impeller center pin fixing bolt always takes place in the immersible pump maintenance process and loosens to the trouble that leads to the impeller to drop has used multiple method, and the effect is all not very good, finally designs this kind of dual check bolt, and the effect is good, and the principle is as follows, drills a through-hole in former bolt center, installs a pull rod bolt of head area expander additional, and big bolt has locking gasket like this, and the pull rod bolt expander is tight in close contact with. Double anti-loosening and ideal effect. This design mainly used stainless steel bolt and center pin, locking when two kinds of different materials combine, based on this, this design provides a dual check bolt.

Disclosure of Invention

An object of the utility model is to overcome prior art's is not enough, adapts to reality needs, provides a dual check bolt.

In order to realize the purpose of the utility model, the utility model designs a double anti-loosening bolt, which comprises a big bolt, a gasket, an expander and a pull rod bolt; the big bolt stretches into in the gasket, big bolt threaded connection is on the center pin shaft hole, big bolt center department is equipped with first through-hole, just first through-hole runs through big bolt center sets up, install in the through-hole draw bar bolt, just big bolt and draw bar bolt coaxial arrangement, draw bar bolted connection the expander, and pass through draw bar bolt pulling the expander expansion extrusion is in on the center pin shaft hole inner wall.

Further, the expander threaded connection in the stay bolt is terminal, the expander comprises expansion ring and stripper bar, the stripper bar front end threaded connection in on the stay bolt end, through the external screw thread of stripper bar front end with the terminal interior screw-thread fit of stay bolt, just when the stay bolt wrench movement stay bolt with the stripper bar moves in opposite directions and pastes tightly the big bolt both ends, the expansion ring is the arc ring of an arc area breach.

Furthermore, the expansion ring is further provided with a through hole, the tail end of the large bolt is also provided with a hole, a limit pin is inserted into the hole, and the limit pin penetrates through the through hole in the expansion ring and extends into the hole to limit the rotation of the expansion ring.

Furthermore, a plurality of extrusion pieces are arranged at the rear end of the extrusion rod along the circumference, the extrusion pieces are plate-shaped, the front ends of the extrusion pieces are triangular, and the front ends of the extrusion pieces are inserted into the expansion ring.

Further, the inside edge of expansion ring still is equipped with the rectangle spacing groove, still be equipped with spacing arch on the extrusion stem, spacing arch is the rectangle, just spacing arch inserts the rectangle spacing inslot.

The beneficial effects of the utility model reside in that:

the double-locking bolt has the advantage that the device is simple and convenient to use, and through the matching of the big bolt and the pull rod bolt, the original bolt not only has the locking of an original big bolt gasket, but also has further locking treatment on a fixed position through the expander matched with the pull rod bolt.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a schematic sectional view taken along line A1-A1 of FIG. 1;

fig. 3 is an installation schematic diagram of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and examples:

example 1: a double check bolt, see fig. 1 to 3; comprises a big bolt 2, a gasket 5, an expander 4 and a draw rod bolt 1.

Specifically, as shown in fig. 1, the large bolt 2 extends into the gasket 5, the large bolt 2 is in threaded connection with the shaft hole of the central shaft 8, a first through hole 3 is formed in the center of the large bolt 2, the first through hole 3 penetrates through the center of the large bolt 2, the pull rod bolt 1 is installed in the first through hole 3, the large bolt 2 and the pull rod bolt 1 are coaxially installed, the pull rod bolt 1 is connected with the expander 4, and the expander 4 is expanded and extruded on the shaft hole of the central shaft 8 through the pull rod bolt 1.

More specifically, 4 threaded connection of expander in pull rod bolt 1 is terminal, expander 4 comprises expansion ring 9 and squeeze bar 10, squeeze bar 10 front end threaded connection is in on the pull rod bolt 1 end, the external screw thread of squeeze bar 10 front end with the interior screw-thread fit at pull rod bolt 1 end, just when pull rod bolt 1 wrench movement pull rod bolt 1 with squeeze bar 10 moves in opposite directions and pastes tightly 2 both ends of big bolt, expansion ring 9 is the arc ring of an arc area breach 6. Thereby twist above-mentioned stay bolt 1 the extrusion stem 10 to the expansion ring 9 extrusion makes expansion ring 9 atress expansion, and at this in-process stay bolt 1 is right toward big bolt 2 pastes tightly, and extrusion stem 10 is left toward big bolt 2 pastes tightly, thereby prevents big bolt 2 is not hard up.

The expansion ring 9 is further provided with a second through hole 11, the tail end of the large bolt 2 is also provided with a hole 13, a limit pin 14 is inserted into the hole 13, and the limit pin 14 penetrates through the second through hole 11 in the expansion ring 9 and extends into the hole 13. The limiting pin 14 penetrates through the expansion ring 9 and extends into the hole 13, so that the expansion ring 9 can not expand and expand due to the fact that the stay bolt 1 idles together with the expansion ring 9 in the rotating process.

The rear end of the extrusion rod 10 is circumferentially provided with a plurality of extrusion pieces 15, each extrusion piece 15 is plate-shaped, the front end of each extrusion piece 15 is triangular, and the front end of each extrusion piece 15 is inserted into the expansion ring 9. The pressing piece 15 is used for driving the pressing piece 15 to abut against the expansion ring 9 when the expansion device 4 is pulled by the draw bolt 1, and for forcing the expansion ring 9 to expand under the pressing action of the pressing piece 15 on the expansion ring 9.

The inside edge of expansion ring 9 still is equipped with rectangle spacing groove 12, still be equipped with spacing arch 16 on the extrusion stem 10, spacing arch 16 is the rectangle, just spacing arch 16 inserts in the rectangle spacing groove 12. The limiting protrusion 16 and the rectangular limiting groove 12 are matched with each other, so that the pull rod bolt can be prevented from driving the extrusion rod 10 to idle.

The specific use method of the design is as follows:

as shown in fig. 3, firstly, an impeller 7 is sleeved on a central shaft 8, then the draw bar bolt 1 together with the expander 4 is installed on the large bolt 2, then the large bolt 2 is inserted into the central shaft 8 shaft hole, the gasket 5 is padded between the impeller 7 and the large bolt 2, the large bolt 2 is tightened to make the gasket 5 tightly attached to the surface of the impeller 7, then the draw bar bolt 1 is rotated to rotate the draw bar bolt 1 towards the inside of the large bolt 2 so as to pull a pressing sheet at the tail end of a pressing rod 10 of the expander 4 against the expansion ring 9, then the draw bar bolt 1 is continuously tightened to make the expansion ring 9 of the expander 4 drive the pressing rod 10 to expand towards the end of the large bolt 2 and force the expansion ring 9 against the inner wall of the central shaft 8 shaft hole during the tightening process of the draw bar bolt 1, the draw bar bolt 1 drives the pressing rod 10 to expand towards the end of the large bolt 2 and the expansion ring 9 is pressed against the inner wall of the central shaft 8 shaft, in the fastened state, the end surface of the stay bolt 1 and the expansion ring 9 of the expander 4 are both in close contact with the end surface of the bolt 2, and the impeller 7 is fastened to the center shaft 8.

The embodiment of the present invention discloses a preferred embodiment, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention according to the above embodiment, and make different extensions and changes, but do not depart from the spirit of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A double anti-loose bolt comprises a big bolt, a gasket, an expander and a pull rod bolt; big bolt stretches into in the gasket, big bolt threaded connection is on the center pin shaft hole, its characterized in that: the center of the big bolt is provided with a first through hole, the first through hole penetrates through the center of the big bolt, the draw-bar bolt is installed in the through hole and coaxially installed with the big bolt, the draw-bar bolt is connected with the expander and is expanded and extruded on the inner wall of the shaft hole of the central shaft through the drawing of the draw-bar bolt.

2. A double check bolt as defined in claim 1, wherein: expander threaded connection in the stay bolt is terminal, the expander comprises expansion ring and stripper bar, stripper bar front end threaded connection in on the stay bolt end, through the external screw thread of stripper bar front end with the terminal interior screw-thread fit of stay bolt, just when the stay bolt wrench movement stay bolt with the stripper bar moves in opposite directions and pastes tightly the big bolt both ends, the expansion ring is the arc ring of an arc area breach.

3. A double check bolt as defined in claim 2, wherein: the expansion ring is further provided with a through hole, the tail end of the large bolt is also provided with a hole, a limiting pin is inserted into the hole, and the limiting pin penetrates through the through hole in the expansion ring and extends into the hole to limit the rotation of the expansion ring.

4. A double check bolt as defined in claim 2, wherein: the rear end of the extrusion rod is circumferentially provided with a plurality of extrusion pieces, the extrusion pieces are plate-shaped, the front ends of the extrusion pieces are triangular, and the front ends of the extrusion pieces are inserted into the expansion ring.

5. A double check bolt as defined in claim 2, wherein: the expansion ring is characterized in that a rectangular limiting groove is further formed in the edge of the inner side of the expansion ring, a limiting protrusion is further arranged on the extrusion rod and is rectangular, and the limiting protrusion is inserted into the rectangular limiting groove.