CN212839084U

CN212839084U - Heavy hollow spring

Info

Publication number: CN212839084U
Application number: CN202021446276.XU
Authority: CN
Inventors: 邵承玉; 张俊
Original assignee: HANGZHOU XINGFA SPRING CO Ltd
Current assignee: HANGZHOU XINGFA SPRING CO Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-03-30
Anticipated expiration: 2030-07-21

Abstract

The utility model relates to a heavy spring. The heavy hollow spring comprises a spiral spring body, wherein a through hole is formed in the center of the spring body, a closed structure is arranged at the end part of the spring body, and a cavity formed by the through hole in the center of the spring body is closed by the closed structure to form a closed cavity. The utility model provides a heavy hollow spring with light weight and reliable spring working performance; the technical problems that the weight of the spring is large and the working performance of the spring is reliable in the prior art are solved.

Description

Heavy hollow spring

Technical Field

The utility model relates to a heavy spring especially relates to a heavy hollow spring.

Background

The heavy spring mainly means that the wire diameter of the spring is more than 20 mm, the spring made of solid bar materials is heavy, and the heavy spring is applied to engineering machinery such as bulldozers, excavators and the like. On the premise of ensuring the working stress and reliability of products, the light weight of springs such as building damping springs and heavy-load cushioning springs is expected to be further realized; and energy conservation and emission reduction in some engineering vehicles or moving machines, such as a bulldozer, an excavator tension spring and the like.

Disclosure of Invention

The utility model provides a heavy hollow spring with light weight and reliable spring working performance; the technical problems that the weight of the spring is large and the working performance of the spring is reliable in the prior art are solved.

The above technical problem of the present invention is solved by the following technical solutions: the heavy hollow spring comprises a spiral spring body, wherein a through hole is formed in the center of the spring body, a closed structure is arranged at the end part of the spring body, and a cavity formed by the through hole in the center of the spring body is closed by the closed structure to form a closed cavity. The spring main body is rolled through the steel pipe, and the steel pipe is hollow, so that the weight of the rolled spring main body is reduced by about 35%, and the requirement of heavy springs on light weight is met. And because there is the through-hole at the center of spring main part, like this, under greasy dirt or some service environment, can get into a lot of impurity etc. in the through-hole of centre, influence the performance of spring, consequently, seal the both ends of hollow spring main part through enclosed construction at the both ends of spring main part to form a complete whole, when using with solid spring, can not receive the influence of environment, but its weight has nevertheless realized the lightweight, when guaranteeing the quality degradation, the stability that the spring used is good.

Preferably, the closed structure comprises an end cover plate, the shape of the end cover plate is the same as the cross section of the spring main body, and the end cover plate is welded on the end face of the spring main body. The cover plate is made of metal parts and is directly welded, so that the sealing performance is good.

Preferably, the closed structure comprises an end cover, the end cover comprises a cover plate and a connecting body, the shape of the cover plate is the same as the cross section of the spring main body, the connecting body is provided with external threads, and the inner wall of the end face of the spring main body is provided with internal threads. Through threaded connection, convenient change and adjustment.

Preferably, the sealing structure comprises a plug, the shape of the plug is the same as that of the through hole at the end part of the spring main body, and the plug is in interference fit with the through hole. The plug can be a metal piece or a non-metal piece, and is directly installed into the end part by external force to form a closed structure.

Preferably, the closed structure is a closed end head rolled from the end of the spring body.

Preferably, the spring body is a rolled seamless steel tube. The coiled spring main body has good strength and high stability.

Therefore, the utility model discloses a heavy hollow spring possesses following advantage: the spring main body is rolled through a rolled seamless steel pipe, the weight of the spring is reduced by about 35%, so that the light weight requirement of the spring is met, meanwhile, the end of the spring main body is sealed by welding, embedding, threads, grinding the tip and the like, the influence of the use environment of the spring on the performance of the spring is reduced, and the stability of the spring is improved.

Drawings

Fig. 1 is a perspective view of a spring body.

Fig. 2 is a closed-end perspective view of the structure in examples 1 and 2.

Fig. 3 is a closed end cross-sectional view in example 1.

Fig. 4 is a closed end cross-sectional view in example 2.

Fig. 5 is a closed end perspective view in example 3.

FIG. 6 is a close-end cross-sectional view in example 3.

Fig. 7 is a closed end perspective view in example 4.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in fig. 1, 2 and 3, a heavy hollow spring comprises a hollow spring body 1 made of a seamless steel tube rolled from spring steel GB/T1222. Both ends of the spring body 1 are closed by cover plates 3 at both ends of the spring body 1. The cover plate 3 is a metal piece, the shape of the cover plate 3 is the same as the cross section of the spring main body, and the cover plate 3 is welded on the end face of the spring main body 1 to seal two ends of the through hole 2 in the center of the spring main body.

Example 2:

as shown in fig. 4, a heavy hollow spring includes a hollow spring body 1 made of a seamless steel tube rolled by 30 CrMo. The two ends of the spring main body 1 are sealed by end covers at the two ends of the spring main body 1, each end cover is composed of a cover plate 3 and a connecting body 4 which are integrally formed, the shape of each cover plate 3 is the same as the cross section of the spring main body 1, external threads are arranged on each connecting body 4, and internal threads are arranged on the inner wall of the end face of the spring main body 1. The connecting body of the end cover is screwed into the through hole 2 at the end part of the spring main body to complete threaded connection, so that two ends of the spring main body are sealed.

Example 3:

as shown in fig. 5 and 6, a heavy hollow spring includes a hollow spring body 1 made of a seamless steel tube rolled by 35 CrMo. Install end cap 5 in the through-hole at spring main body's both ends, through-

hole

2 and 5 interference fit of end cap to seal hollow spring main body 1's both ends through inlaying the end cap.

Example 4:

as shown in fig. 7, a heavy hollow spring includes a hollow spring body 1 made of a seamless steel tube rolled of 40 CrMo. The two ends of the spring main body 1 are flattened by rolling to seal the end part of the steel pipe for rolling the spring main body, so that the end part of the spring main body is sealed.

Claims

1. A heavy hollow spring characterized in that: the spiral spring comprises a spiral spring body, wherein a through hole is formed in the center of the spring body, a closed structure is arranged at the end part of the spring body, and the closed structure seals a cavity formed by the through hole in the center of the spring body to form a closed cavity.

2. A heavy duty hollow spring as claimed in claim 1 wherein: the closed structure comprises an end cover plate, the shape of the end cover plate is the same as the cross section of the spring main body, and the end cover plate is welded on the end face of the spring main body.

3. A heavy duty hollow spring as claimed in claim 1 wherein: the closed structure comprises an end cover, the end cover comprises a cover plate and a connecting body, the shape of the cover plate is the same as the cross section of the spring main body, the connecting body is provided with external threads, and the inner wall of the end face of the spring main body is provided with internal threads.

4. A heavy duty hollow spring as claimed in claim 1 wherein: the sealing structure comprises a plug, the shape of the plug is the same as that of the through hole in the end part of the spring main body, and the plug is in interference fit with the through hole.

5. The heavy duty hollow spring of claim 1, wherein: the closed structure is a closed end head rolled by the end part of the spring main body.

6. The heavy duty hollow spring according to any one of claims 1 to 5, wherein: the spring main body is a rolled seamless steel pipe.