CN218294280U

CN218294280U - Extension spring not easy to break

Info

Publication number: CN218294280U
Application number: CN202222635077.9U
Authority: CN
Inventors: 周显华; 周海森; 周显龙
Original assignee: Foshan Senhualong Spring Technology Co ltd
Current assignee: Foshan Senhualong Spring Technology Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-01-13
Anticipated expiration: 2032-10-08

Abstract

The utility model discloses a tension spring which is not easy to break, the spring consists of continuous coils which are closely arranged, nuts are movably arranged at the two ends of the spring, the outer side of each nut is provided with a thread, and one end of each nut, which is far away from the spring, is provided with a connecting seat; the utility model discloses an at spring both ends movable mounting have the nut to connect the article that need connect respectively through the connecting seat, make tensile effort homodisperse on the nut outside and spring complex screw thread, make in the use spring and nut junction be difficult to the fracture, strengthen tensile spring holistic bearing capacity and durability.

Description

Extension spring not easy to break

Technical Field

The utility model relates to a spring field, especially an easy cracked extension spring.

Background

The extension spring, called the tension spring for short, is a spiral spring bearing axial tension, and when not bearing load, the rings of the extension spring are generally parallel and tight without gaps; the spring and the hooks at the two ends of the spring are manufactured by rolling and molding materials with round sections in the production process; in the actual use process of the structure, the hook acts on an axial stretching object, and stress is accumulated at the connecting part of the hook and the spring, so that in the reciprocating continuous stretching process, the hook and the spring are easy to break due to exceeding the fatigue limit of a stress point in the working process, and certain potential safety hazard is caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an extension spring which is not easy to break.

In order to achieve the purpose, the utility model discloses a following technical scheme, a difficult cracked extension spring, the spring comprises the continuous helicoidal that closely stands side by side, spring both ends movable mounting has the nut, the nut outside is provided with the screw thread, the nut is kept away from spring one end and is provided with the connecting seat.

Preferably, the nut is threadedly mounted inside the spring.

Preferably, the nut is provided with a through hole in the center.

In an embodiment thereof, the connection seat is provided as an annular step on the outside of the nut.

In an embodiment thereof, the connection socket is provided as an annular groove inside the nut.

In one embodiment, the connecting socket is provided as a connecting ring perpendicular to the end surface of the nut.

In one embodiment, the connecting seat is provided as a hook perpendicular to the end surface of the nut.

The utility model has the advantages that: the utility model discloses an at spring both ends movable mounting have the nut to connect the article that need connect respectively through the connecting seat, make tensile effort homodisperse on the nut outside and spring complex screw thread, make in the use spring and nut junction be difficult to the fracture, strengthen the holistic bearing capacity of extension spring and durability.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional structure of the present invention;

fig. 2 is a schematic sectional structure view of the nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the tension spring not easy to break comprises a spring 1 consisting of closely parallel continuous coils, nuts 2 are movably mounted at two ends of the spring 1, threads are arranged on the outer sides of the nuts 2, and a connecting seat 3 is arranged at one end, far away from the spring 1, of each nut 2.

Two ends of the spring 1 replace drag hooks in the prior art through nuts, and the connecting seat 3 arranged on the nut 2 realizes the connection performance with a connected object; make nut 2 when receiving the effort through connecting seat 3, effort accessible screw thread homodisperse, stress no longer accumulates in the junction of couple and spring, consequently reciprocal continuous tensile in-process, and spring 1 is difficult to produce the fracture because of surpassing the fatigue limit of stress point with nut 2 junction, strengthens tensile spring holistic fatigue upper limit, bearing capacity and durability.

In addition, because spring and drag hook among the prior art are through the same material book system shaping, consequently when drag hook and spring fracture, this product can't use, need replace whole extension spring, and the extension spring that this application designed, even one of them part of spring 1 or nut 2 damages, can improve the utilization ratio of material through threaded mode reinstallation.

Preferably, nut 2 threaded mounting is in spring 1 inboard, is more convenient for observe nut 2 and the equipment cooperation condition of spring 1, observes both cooperations and whether targets in place.

Preferably, the nut 2 is centrally provided with a through hole 4, and during the stretching process, the acting force between the nut 2 and the spring 1 is mainly concentrated on the thread on the outer side of the nut 2, so that the through hole 4 centrally provided in the nut 2 can reduce the material cost without affecting the performance of the product.

In embodiment 1, the connection socket 3 is provided as an annular step on the outside of the nut 2.

In embodiment 2, the connection socket 3 is provided as an annular groove inside the nut 2.

In embodiment 3, the connecting socket 3 is provided as a connecting ring perpendicular to the end surface of the nut 2.

In embodiment 4, the connecting seat 3 is provided as a hook perpendicular to the end surface of the nut 2.

The above embodiments 1 to 4 are different designs of the connection seat 3 in the design scheme of the present application, and the specific arrangement manner of the connection seat 3 should be designed according to the specific structure of the connection object.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides a not easy cracked extension spring, its characterized in that spring (1) comprises the continuous helicoidal that closely parallels, spring (1) both ends movable mounting has nut (2), the nut (2) outside is provided with the screw thread, nut (2) keep away from spring (1) one end and are provided with connecting seat (3).

2. An extension spring according to claim 1, characterized in that the nut (2) is threaded inside the spring (1).

3. An extension spring according to claim 1, characterized in that the nut (2) is centrally provided with a through hole (4).

4. An extension spring according to claim 1, characterized in that the connecting seat (3) is provided as an annular step outside the nut (2).

5. An extension spring according to claim 1, characterized in that the connecting socket (3) is provided as an annular groove inside the nut (2).

6. An extension spring according to claim 1, characterized in that the connecting socket (3) is arranged as a connecting ring perpendicular to the end surface of the nut (2).

7. An extension spring according to claim 1, characterized in that the connecting socket (3) is provided as a hook perpendicular to the end surface of the nut (2).