CN217421764U - Restoration structure of fracture screw rod - Google Patents

Abstract

The utility model discloses a repair structure of a broken screw, which comprises a screw section and a connecting section; a trimming plane is processed at the fracture end of the screw section, a positioning hole coaxial with the screw section is axially formed in the trimming plane, and a threaded hole is processed and formed in the positioning hole; the connecting section comprises a thread section, a transition section and a spline section which are integrally formed in sequence; the threaded section is in threaded connection with the threaded hole; the outer diameter of the transition section is equal to that of the screw section, and the end surface of the transition section connected with the screw section is attached to the finishing plane; the screwing direction of the screw thread section is opposite to the working rotation direction of the screw section. The utility model discloses a screw rod section is restoreed the cracked screw rod with being connected of linkage segment, and different screw threads that revolve to during operation can reach the locking effect by oneself, and after the two locks, its stress point has changed at the terminal surface position that combines, has realized that radial rotation moment of torsion turns into tip axial atress, and has not had any theoretical clearance this moment in combination with the tip.

Description

Restoration structure of fracture screw rod

Technical Field

The utility model relates to a technical field is restoreed to the screw rod, and more specifically the structure is restoreed that relates to a fracture screw rod that says so.

Background

Once the large-scale screw and the imported high-price screw are broken, the screw is scrapped, and a new screw needs to be purchased. This conventional disposal creates a significant cost waste. In order to solve this problem, most factories select operations such as welding repair, but the use accuracy of the screw is lowered due to deformation caused by welding, and the welded screw still has a problem of insufficient strength.

Therefore, how to provide a repair structure for a broken screw is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a restoration structure of fracture screw rod aims at solving above-mentioned technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a repair structure of a broken screw, comprising:

a screw section; a trimming plane is processed at the fracture end of the screw section, a positioning hole coaxial with the screw section is axially formed in the trimming plane, and a threaded hole is processed and formed in the positioning hole;

a coupling section; the connecting section comprises a thread section, a transition section and a spline section which are integrally formed in sequence; the threaded section is in threaded connection with the threaded hole; the outer diameter of the transition section is equal to that of the screw section, and the end surface of the transition section, which is connected with the screw section, is attached to the finishing plane; the screwing direction of the screw thread section is opposite to the working rotating direction of the screw rod section.

Through the technical scheme, the utility model discloses a screw rod section and the connection of hookup section are restoreed cracked screw rod, and during the screw thread operation of different handedness, can reach the locking effect by oneself, and after the two locks, its stress point has changed at the terminal surface position that combines, has realized that radial rotation moment of torsion turns into tip axial atress, and does not have any theoretical clearance this moment in combination tip. The axial load of the end is therefore several times greater than the radial load of the coupling segment, and in practice, this repair process has proven to be extremely reliable, in particular for large-scale screws and screws with high cost at the inlet, in case of a fracture, completely avoiding the "scrapping" result.

Preferably, in the repair structure for a broken screw, the screw section and the connecting section are made of the same material. The repaired screw structure can be ensured to have good uniform performance.

Preferably, in the repair structure for a broken screw, an outer diameter of the transition section is larger than outer diameters of the thread section and the spline section. The stable connection relation of the screw thread section and the screw section and the stable transition result of the transition section can be ensured.

Preferably, in the above repairing structure for a fractured screw, a distance between the finishing plane and the fractured end face of the screw section is not less than 45 mm. The crack is completely eliminated to ensure the connection strength.

Preferably, in the repair structure for a broken screw, a total length of the screw section and the connecting section after connection is equal to a length of an original screw. The use requirement after repair can be ensured.

Preferably, in the repair structure for the broken screw, the spline section is machined on the outer side wall to form a spline. Can satisfy the use of screw rod structure and connect.

Preferably, in the repair structure for a broken screw, a corresponding annular groove is formed in an end face where the finishing plane and the transition section are attached to each other; two all fill up in the ring channel and be equipped with spring washer, two still inlay in the ring channel be equipped with the ring gear of spring washer laminating, ring gear deviates from the insection has on spring washer's the ring terminal surface, two ring gear's insection meshing. In order to further improve the stability after connecting, the utility model discloses embedded elastic washer and ring gear respectively on the connection end face of screw rod section and linkage segment, when screwing up, because elastic washer's elastic action makes ring gear have the controllability, guarantee the insection meshing after screwing up, elastic washer's friction and the meshing of insection can further prevent to use not hard up, guarantee the stability of structure.

Can know via foretell technical scheme, compare with prior art, the utility model discloses a repair structure of fracture screw rod has following beneficial effect:

1. the utility model discloses a screw rod section is restoreed the cracked screw rod with being connected of linkage segment, and different screw threads that revolve to during operation can reach the locking effect by oneself, and after the two locks, its stress point has changed at the terminal surface position that combines, has realized that radial rotation moment of torsion turns into tip axial atress, and has not had any theoretical clearance this moment in combination with the tip. Therefore, the axial stress load of the end part is more than the radial stress load of the connecting section which is several times larger, and the repairing process is proved to be extremely reliable in practice, and the 'scrapping' result can be completely avoided particularly for large-scale screws and imported high-price screws once the screw is broken.

2. The utility model discloses embedded elastic washer and ring gear respectively on the connection terminal surface of screw rod section and hookup section, when screwing up, because elastic washer's elastic action makes ring gear have the controllability, guarantee the insection meshing after screwing up, elastic washer's friction and the meshing of insection can further prevent to use not hard up, guarantee the stability of structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of a repairing structure of a broken screw provided by the present invention;

FIG. 2 is a schematic view of a screw section provided by the present invention;

FIG. 3 is a schematic view of a coupling segment according to the present invention;

FIG. 4 is a schematic view of a broken portion of an original screw rod provided by the present invention;

fig. 5 is a schematic view of a broken screw for mounting an elastic washer and an annular gear ring provided by the present invention;

fig. 6 is a schematic diagram of a section of elastic washer and annular gear ring after being matched.

Wherein:

1-a screw section;

11-trimming a plane; 12-positioning holes; 13-a threaded hole; 14-fracture end face;

2-a coupling section;

21-a threaded segment; 22-a transition section; 23-spline section; 231-splines;

3-a resilient gasket;

4-ring-shaped gear ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1 to 4, the embodiment of the utility model discloses a repair structure of fracture screw rod includes:

a screw section 1; a trimming plane 11 is processed at the fracture end of the screw section 1, a positioning hole 12 coaxial with the screw section 1 is axially formed in the trimming plane 11, and a threaded hole 13 is processed and formed in the positioning hole 12;

a coupling section 2; the connecting section 2 comprises a threaded section 21, a transition section 22 and a spline section 23 which are integrally formed in sequence; the threaded section 21 is in threaded connection with the threaded hole 13; the outer diameter of the transition section 22 is equal to that of the screw section 1, and the end surface of the transition section 22 connected with the screw section 21 is attached to the finishing plane 11; the screwing direction of the screw thread segments 21 is opposite to the working rotation direction of the screw segment 1.

In order to further optimize the technical scheme, the screw section 1 and the connecting section 2 are made of the same material.

In order to further optimize the above technical solution, the outer diameter of the transition section 22 is larger than the outer diameters of the threaded section 21 and the splined section 23.

In order to further optimize the above technical solution, the distance between the finishing plane 11 and the fracture end surface 14 of the screw section 1 is not less than 45 mm.

In order to further optimize the technical scheme, the total length of the connected screw section 1 and the connecting section 2 is equal to the length of the original screw.

In order to further optimize the above technical solution, the outer side wall of the spline section 23 is processed to form a spline 231.

The repair process route of the embodiment is based on the theoretical concept that the radial direction of the connecting section 2 is converted into the torque and converted into the axial end face stress, and a set of repair technology is innovated.

The technology is completed by three process steps:

in the first step, the fatigue damage range of the screw fracture area is determined, and then the damage part generated by the fatigue damage range is completely cut off, such as the fracture end face 14 in fig. 4, and is completely cut off within 45mm of the left side, so that the hidden trouble is eliminated, and the trimming plane 11 is formed.

And secondly, processing a connecting section 2 according to the installation size of the original screw, wherein as shown in fig. 3, the total length of the connecting section 2 in the embodiment is 235mm, the material of the connecting section 2 is the same as that of the screw, and the embodiment selects 38CrMoAlA and is treated with HB 200-220 by heat treatment modulation.

And thirdly, machining the positioning hole 12 and the threaded hole 13 on the screw section 1 on a common lathe by taking phi 80mm as a reference as shown in fig. 2, and screwing the threaded section 21 of the connecting section 2 into the threaded hole 13 to finish the whole repairing process.

In this embodiment, the threaded hole 13 is left-handed and the screw is right-handed, so that the screw with different rotation directions can be self-locked during operation.

Example 2:

the present embodiment is further improved on the basis of embodiment 1: corresponding annular grooves are formed in the end faces, attached to the trimming plane 11 and the transition section 22, of the trimming plane; all fill up in two ring channels and be equipped with elastic gasket 3, still inlay in two ring channels and be equipped with the annular ring gear 4 with the laminating of elastic gasket 3, have the insection on the annular ring gear 4 deviates from the ring terminal surface of elastic gasket 3, the insection meshing of two annular ring gears 4.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A repair structure of a broken screw rod, comprising:

a screw section (1); a trimming plane (11) is machined at the fracture end of the screw section (1), a positioning hole (12) coaxial with the screw section (1) is axially formed in the trimming plane (11), and a threaded hole (13) is machined in the positioning hole (12);

a coupling section (2); the connecting section (2) comprises a threaded section (21), a transition section (22) and a spline section (23) which are integrally formed in sequence; the threaded section (21) is in threaded connection with the threaded hole (13); the outer diameter of the transition section (22) is equal to that of the screw section (1), and the end face of the transition section (22) connected with the screw thread section (21) is attached to the trimming plane (11); the screwing direction of the screw thread section (21) is opposite to the working rotating direction of the screw rod section (1).

2. A repair structure of a broken screw according to claim 1, characterized in that said screw section (1) and said coupling section (2) are of the same material.

3. A repair structure for a broken screw according to claim 1, characterized in that the transition section (22) has an outer diameter larger than the outer diameters of the threaded section (21) and the splined section (23).

4. A repairing structure of a fractured screw according to claim 1, wherein the distance between the finishing plane (11) and the fractured end face (14) of the screw section (1) is not less than 45 mm.

5. A repair structure of a broken screw according to claim 1, wherein the total length of the screw section (1) and the coupling section (2) after connection is equal to the length of the original screw.

6. A repair structure for a broken screw according to claim 1, characterized in that the spline section (23) is formed with a spline (231) on its outer side wall.

7. The repair structure of a broken screw according to any one of claims 1 to 6, wherein the end face where the trimming plane (11) and the transition section (22) are jointed is provided with a corresponding annular groove; two all fill up in the ring channel and be equipped with spring washer (3), two still inlay in the ring channel be equipped with ring gear (4) of spring washer (3) laminating, ring gear (4) deviate from have the insection on the ring terminal surface of spring washer (3), two the insection meshing of ring gear (4).

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