CN210164767U

CN210164767U - Hydraulic expansion screw

Info

Publication number: CN210164767U
Application number: CN201920971044.7U
Authority: CN
Inventors: 陈磊; 王喜庆
Original assignee: Zhengzhou Dingneng Industrial Co Ltd
Current assignee: Zhengzhou Dingneng Industrial Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-03-20
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses a hydraulic expansion screw, which comprises a hydraulic expansion pipe, wherein the hydraulic expansion pipe is provided with a holding cavity with an opening at one end along the length direction, and also comprises a hydraulic screw rod in threaded connection with the opening end of the hydraulic expansion pipe and a hydraulic screw rod adjusting part, one end of the hydraulic screw rod extends into the holding cavity to seal the opening end of the holding cavity, and a hydraulic medium is filled in the holding cavity; a plurality of expansion heads are uniformly arranged on the inner wall of the accommodating cavity along the radial direction, and the expansion heads can move along the radial direction on the inner wall of the accommodating cavity; still locate the metal sleeve of hydraulic pressure expansion pipe outer wall including the cover, set up a plurality of inflation holes on the metal sleeve, the center in inflation hole is on the axis of inflation head, thereby rotatory hydraulic screw makes hydraulic screw remove in order to adjust the hydraulic pressure force in the holding intracavity and make the inflation screw protrusion inflation hole to the holding intracavity. Because the stress deformation positions are uniformly distributed on the circumference of the screw hydraulic expansion pipe, the pressure is uniform, the center of the screw is not easy to deviate when the screw is screwed down, and the expansion screw is firmer and not easy to loosen or fall off compared with the conventional expansion screw after expansion.

Description

Hydraulic expansion screw

Technical Field

The utility model relates to an expansion screw field, concretely relates to hydraulic pressure expansion screw.

Background

At present, expansion screws in the field of hardware are all mechanical structures, so that a shell is stressed to expand, and the expansion screws are fixed in mounting holes; conventional expansion screws are prone to tilting during installation and are prone to loosening or falling out when not installed in place.

Therefore, the prior art is in need of further improvement.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned situation, the utility model provides a hydraulic expansion screw, because atress warp the position and lie in evenly distributed on the screw hydraulic expansion pipe circumference, pressure is even, and the screw center is difficult for deviating when the screw is screwed up, and this expansion screw is more firm difficult not hard up or drops than conventional expansion screw after the inflation moreover.

In order to achieve the purpose, the following technical scheme is adopted:

a hydraulic expansion screw comprises a hydraulic expansion pipe, a hydraulic screw rod and a hydraulic screw rod adjusting part, wherein the hydraulic expansion pipe is provided with an accommodating cavity with an opening at one end along the length direction, the hydraulic screw rod is in threaded connection with the opening end of the hydraulic expansion pipe, one end of the hydraulic screw rod extends into the accommodating cavity to seal the opening end of the accommodating cavity, and a hydraulic medium is filled in the accommodating cavity; a plurality of expansion heads are uniformly arranged on the inner wall of the accommodating cavity along the radial direction, and the expansion heads can move along the radial direction on the inner wall of the accommodating cavity; the hydraulic expansion pipe is characterized by further comprising a metal sleeve sleeved on the outer wall of the hydraulic expansion pipe, a plurality of expansion holes are formed in the metal sleeve, the centers of the expansion holes are located on the axis of the expansion head, and the hydraulic screw is rotated to move towards the accommodating cavity so as to adjust the hydraulic pressure in the accommodating cavity and enable the expansion screw to protrude out of the expansion holes.

Wherein, all be equipped with two breachs so that the expansion screw protrusion inflation hole on every inflation hole.

The hydraulic expansion pipe is provided with a through hole matched with the expansion head along the radial direction, and the expansion head is connected with the through hole in a sealing mode.

The hydraulic screw adjusting part comprises a washer and an adjusting nut so as to fix the extending position of the hydraulic screw in the accommodating cavity.

Drawings

Fig. 1 is a schematic structural view of a hydraulic expansion screw according to the present invention;

fig. 2 is an exploded view of a hydraulic expansion screw according to the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

in the figure: a hydraulic expansion pipe-10; an accommodating cavity-11; a hydraulic screw-12; expansion head-20; a metal sleeve-30; expansion hole-31; notch-311; a washer-41; and adjusting a nut-42.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

With reference to fig. 1-3, the present invention provides a hydraulic expansion screw, which includes a hydraulic expansion pipe 10, the hydraulic expansion pipe 10 is provided with an accommodating cavity 11 with an open end along a length direction, and further includes a hydraulic screw 12 and a hydraulic screw adjusting portion, the hydraulic screw 12 is in threaded connection with the open end of the hydraulic expansion pipe 10, one end of the hydraulic screw 12 extends into the accommodating cavity 11 to seal the open end of the accommodating cavity, and hydraulic oil is filled in the accommodating cavity 11; a plurality of expansion heads 20 are uniformly arranged on the inner wall of the accommodating cavity 11 along the radial direction, the expansion heads 20 can move along the inner wall of the accommodating cavity along the radial direction, a through hole matched with the expansion heads 20 is arranged on the hydraulic expansion pipe 10 along the radial direction, and the expansion heads 20 are connected with the through hole in a sealing manner; the hydraulic expansion pipe is characterized by further comprising a metal sleeve 30 sleeved on the outer wall of the hydraulic expansion pipe 10, a plurality of expansion holes 31 are formed in the metal sleeve 30, the centers of the expansion holes 31 are located on the axis of the expansion head 20, and the hydraulic screw 12 is rotated to enable the hydraulic screw 12 to move into the accommodating cavity 11 so as to adjust hydraulic pressure in the accommodating cavity 11 and enable the expansion screws to protrude out of the expansion holes 31.

Preferably, as shown in fig. 3, two notches 311 are symmetrically provided on each expansion hole 31 to facilitate the expansion screw to smoothly protrude out of the expansion hole 31.

Preferably, as shown in fig. 1 and 2, the hydraulic screw adjusting portion includes a washer 41 and an adjusting nut 42 to fix the protruding position of the hydraulic screw 12 in the accommodating cavity 11, and further enhance the installation firmness of the expansion screw.

The utility model discloses a hydraulic expansion screw, hydraulic expansion pipe inner wall, hydraulic pressure oil etc. are equipped with in the sealed space that hydraulic screw 12 and expansion head 20 three formed, after in this hydraulic expansion screw placed the mounting hole, when screwing up hydraulic screw 12, the sealed space that hydraulic expansion pipe inner wall, hydraulic screw 12 and expansion head 20 three formed diminishes, thereby hydraulic oil pressure grow in the space, and then promote expansion head 20 protrusion metal sleeve 30's expansion hole 31 and mounting hole formation interaction force fixed firm. The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments, but such modifications or substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The hydraulic expansion screw is characterized by comprising a hydraulic expansion pipe, a hydraulic screw rod and a hydraulic screw rod adjusting part, wherein the hydraulic expansion pipe is provided with an accommodating cavity with one open end along the length direction; a plurality of expansion heads are uniformly arranged on the inner wall of the accommodating cavity along the radial direction, and the expansion heads can move along the inner wall of the accommodating cavity along the radial direction; the hydraulic expansion pipe is characterized by further comprising a metal sleeve sleeved on the outer wall of the hydraulic expansion pipe, a plurality of expansion holes are formed in the metal sleeve, the centers of the expansion holes are located on the axis of the expansion head, and the hydraulic screw is rotated to move towards the accommodating cavity so as to adjust the hydraulic pressure in the accommodating cavity and enable the expansion screw to protrude out of the expansion holes.

2. The hydraulic expansion screw of claim 1, wherein each expansion hole is symmetrically provided with two notches so that the expansion screw protrudes out of the expansion hole.

3. The hydraulic expansion bolt as claimed in claim 1, wherein the hydraulic expansion tube is provided with a through hole along the radial direction, the through hole is matched with the expansion head, and the expansion head is connected with the through hole in a sealing manner.

4. The hydraulic expansion screw according to any one of claims 1 to 3, wherein the hydraulic screw adjusting portion comprises a washer and an adjusting nut to fix the protruding position of the hydraulic screw in the receiving chamber.