CN209943398U

CN209943398U - Extension spring

Info

Publication number: CN209943398U
Application number: CN201920335983.2U
Authority: CN
Inventors: 郭中华
Original assignee: Nanchang Jinxuan Technology Co Ltd
Current assignee: Nanchang Jinxuan Technology Co Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2020-01-14
Anticipated expiration: 2029-03-15

Abstract

The utility model provides an extension spring, which comprises a spring body, the both ends of spring body are provided with mounting panel No. one and mounting panel No. two respectively, the spring body includes tip spring body and middle spring body, the distance between two adjacent helicoidal rings of tip spring body is 0.5cm-1.5cm, and the diameter is from the tip of spring body to middle part grow gradually, the distance between two adjacent helicoidal rings of middle spring body is 0, and the diameter is unanimous, be provided with limit structure in the hole of spring body, limit structure includes dead lever and movable rod, the top of dead lever is provided with the stopper, the joint piece is installed at the top of movable rod, the utility model discloses can make extension spring's tensile force ability better keep in the axial direction; meanwhile, the two ends of the extension spring can play a good role in buffering and protecting when being impacted by external force; in addition, the stress of the extension spring can be prevented from exceeding the elastic range of the spring.

Description

Extension spring

Technical Field

The utility model relates to a spring technical field, in particular to extension spring.

Background

A spring is a mechanical part that works by elasticity, and is widely used in various mechanical fields. The springs are various in types, including compression springs, extension springs, torsion springs, flat spiral springs, and the like. The extension spring is a coil spring that is subjected to an axial tensile force, and is generally made of a material with a circular cross section. However, the existing extension spring is generally single in structure and often deviates from the axial direction when being stretched outwards, and the existing extension spring does not have a buffering function, so that the existing extension spring is poor in durability and easy to damage; in addition, the existing extension spring does not have a limiting extension function, and because the extension bearing capacity of the extension spring is limited, if the stress of the extension spring exceeds the elastic range of the spring, the spring can be permanently failed and can not be used any more.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides an extension spring, which can keep the tensile force in the axial direction better and avoid the damage caused by the tensile deformation; meanwhile, the two ends of the extension spring can play a good role in buffering and protecting when being impacted by external force; in addition, the stress of the extension spring can be prevented from exceeding the elastic range of the spring, and the situation that the elasticity fails due to overlarge stress is avoided.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

the utility model provides an extension spring, include the spring body of constituteing by a plurality of helicoidal, the both ends of spring body are provided with a mounting panel and No. two mounting panels respectively, the both ends of spring body are all fixed respectively through the welded mode between a mounting panel and No. two mounting panels, all weld the rings that have ring shape structure on a mounting panel and No. two mounting panels, one of them rings and spring body install in on the opposite face of a mounting panel, another rings and spring body install in on the opposite face of No. two mounting panels, the spring body includes the tip spring body at both ends and middle part spring body, tip spring body and middle part spring body are the integrated into one piece structure, the distance between the adjacent two helicoidal of tip spring body correspond the position is 0.5cm-1.5cm, diameter between the adjacent two helicoidal of tip spring body is followed the tip of spring body becomes the middle part gradually The distance between the corresponding positions of two adjacent coils of the middle spring body is 0, the diameter between the two adjacent coils of the middle spring body is consistent, the diameter between the two adjacent coils of the middle spring body is equal to the maximum diameter between the two adjacent coils of the end spring body, a limiting structure is arranged in an inner hole of the spring body and fixed between the first mounting plate and the second mounting plate at two ends of the spring body, the limiting structure comprises a fixed rod and a movable rod, one end of the fixed rod is vertically welded on the second mounting plate, the other end of the fixed rod extends to the position near the first mounting plate, two stoppers are symmetrically arranged on the side surface of the top of the fixed rod, a circular through hole is formed in the central position of each stopper along the axial direction of the fixed rod, and the aperture of the circular through hole is larger than that of the movable diameter rod, the movable rod is two, two the equal vertical welding of one end of movable rod is in on No. two mounting panels, two the other end of movable rod passes respectively two at dead lever top the circular through-hole of stopper extends to near the mounting panel, two the joint piece of cake shape structure is all installed at the top of movable rod, the diameter of joint piece is greater than the aperture of circular through-hole.

As a further improvement of the technical scheme, the spring body is of a spring structure made of high-carbon steel.

As a further improvement of the technical scheme, the inner side surface of the hanging ring is provided with a wavy protruding structure.

As a further improvement of the technical scheme, the outer surface of the spring body is sequentially sprayed with a silicon carbide wear-resistant coating and a zinc yellow antirust paint layer from inside to outside.

As a further improvement of the technical scheme, the outer surfaces of the limiting blocks and the clamping blocks are all sleeved with rubber buffer sleeves.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of extension spring, the spring body includes the tip spring body at both ends and middle part spring body, wherein, the diameter between the adjacent two helicoidal of tip spring body becomes from the tip of spring body to the middle part gradually, the diameter between the adjacent two helicoidal of middle part spring body is unanimous, the diameter between the adjacent two helicoidal of middle part spring body equals the maximum diameter between the adjacent two helicoidal of tip spring body, when making extension spring receive the power to stretch to both ends, the pulling force can better keep in the axial direction, avoid tensile deformation to cause the damage; meanwhile, the distance between two adjacent spiral coils of the end spring body is 0.5cm-1.5cm, and the distance between two adjacent spiral coils of the middle spring body is 0, so that the two ends of the extension spring have compression elasticity, and the two ends of the spring have good buffer action when being impacted by external force, thereby protecting the spring from being damaged; in addition, a limiting structure is arranged in the inner hole of the spring body, the limiting structure comprises a fixed rod and two movable rods, one end of the fixed rod is vertically welded on the second mounting plate, the other end of the fixed rod extends to the vicinity of the first mounting plate, two symmetrical limiting blocks are welded on the side surface of the top of the fixed rod, a circular through hole is arranged at the central position of the limiting blocks along the axial direction of the fixed rod, one ends of the two movable rods are vertically welded on the second mounting plate, the other ends of the two movable rods respectively penetrate through the circular through hole of the fixed rod and extend to the vicinity of the first mounting plate, clamping blocks of a disk-shaped structure are arranged on the tops of the two movable rods, when the stretching spring is stretched to a certain limit from two ends under the stress, the clamping blocks of the movable rods are contacted with the limiting blocks of the fixed rod, so that the movable range of the movable, the stress of the extension spring can be prevented from exceeding the elastic range of the spring, and the situation that the elasticity fails due to overlarge stress is avoided. Therefore, the utility model can keep the tension of the extension spring in the axial direction better, and avoid the damage caused by the extension deformation; meanwhile, the two ends of the extension spring can play a good role in buffering and protecting when being impacted by external force; in addition, the stress of the extension spring can be prevented from exceeding the elastic range of the spring, and the situation that the elasticity fails due to overlarge stress is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a limiting structure in an embodiment of the present invention.

In the figure: 1-spring body, 2-mounting plate, 3-mounting plate, 4-hanging ring, 5-limiting structure, 11-end spring body, 12-middle spring body, 51-fixed rod, 52-movable rod, 511-limiting block and 521-clamping block.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-2, an embodiment of the present invention provides an extension spring, which includes a spring body 1 composed of a plurality of coils, wherein two ends of the spring body 1 are respectively provided with a first mounting plate 2 and a second mounting plate 3, two ends of the spring body 1 are respectively fixed between the first mounting plate 2 and the second mounting plate 3 by welding, the first mounting plate 2 and the second mounting plate 3 are respectively welded with a ring-shaped ring 4, one of the ring 4 and the spring body 1 is mounted on the opposite surface of the first mounting plate 2, the other ring 4 and the spring body 1 are mounted on the opposite surface of the second mounting plate 3, the spring body 1 includes end spring bodies 11 at two ends and a middle spring body 12, the end spring body 11 and the middle spring body 12 are an integrally formed structure, the distance between the corresponding positions of two adjacent coils of the end spring body 11 is 0.5cm-1.5cm, the diameter between two adjacent coils of the end spring body 11 gradually increases from the end to the middle of the spring body 1, the distance between the corresponding positions of two adjacent coils of the middle spring body 12 is 0, the diameter between two adjacent coils of the middle spring body 12 is consistent, the diameter between two adjacent coils of the middle spring body 12 is equal to the maximum diameter between two adjacent coils of the end spring body 11, a limiting structure 5 is arranged in an inner hole of the spring body 1, the limiting structure 5 is fixed between the first mounting plate 2 and the second mounting plate 3 at two ends of the spring body 1, the limiting structure 5 comprises a fixed rod 51 and a movable rod 52, one end of the fixed rod 51 is vertically welded on the second mounting plate 3, the other end extends to near mounting panel 2, the top side welding of dead lever 51 has two symmetries to be provided with stopper 511, the central point of stopper 511 puts and follows circular through-hole has been seted up to dead lever 51's axial direction, the aperture of circular through-hole is greater than the diameter of movable rod 52, movable rod 52 is two, two the equal perpendicular welding of one end of movable rod 52 is in on No. two mounting panels 3, two the other end of movable rod 52 passes respectively two at dead lever 51 top the circular through-hole of stopper 511 extends to near mounting panel 2, two the joint piece 521 of cake shape structure is all installed at the top of movable rod 52, the diameter of joint piece 521 is greater than circular through-hole's aperture.

The extension spring provided by the embodiment comprises a spring body 1, and a first mounting plate 2 and a second mounting plate 3 at two ends of the spring body 1, wherein the spring body 1 comprises an end spring body 11 and a middle spring body 12, the diameter between two adjacent coils of the end spring body 11 is gradually increased from the end to the middle of the spring body 1, the diameter between two adjacent coils of the middle spring body 12 is consistent, and the diameter between two adjacent coils of the middle spring body 12 is equal to the maximum diameter between two adjacent coils of the end spring body 11, so that when the extension spring is stretched towards two ends under stress, the tensile force can be better kept in the axial direction, and the damage caused by stretching deformation is avoided; meanwhile, the distance between two adjacent coils of the end spring body 11 is 0.5cm-1.5cm, and the distance between two adjacent coils of the middle spring body 12 is 0, so that the two ends of the extension spring have compression elasticity, and the two ends of the spring have good buffer action when being impacted by external force, thereby protecting the spring from being damaged; in addition, a limiting structure 5 is arranged in an inner hole of the spring body 1, the limiting structure 5 comprises a fixed rod 51 and two movable rods 52, one end of the fixed rod 51 is vertically welded on the second mounting plate 3, the other end of the fixed rod extends to the vicinity of the first mounting plate 2, two limiting blocks 511 are symmetrically arranged on the side of the top of the fixed rod 51, a circular through hole is arranged in the center of each limiting block 511 along the axial direction of the fixed rod 51, one end of each movable rod 52 is vertically welded on the second mounting plate 3, the other end of each movable rod 52 penetrates through the circular through hole of the fixed rod 51 and extends to the vicinity of the first mounting plate 2, clamping blocks 521 of a disk-shaped structure are arranged on the tops of the two movable rods 52, when the tension spring is stressed to stretch to a certain limit from two ends, the clamping blocks 521 of the movable rods 52 are in contact with the limiting blocks 511 of the fixed rod 51, and further, the extension spring is limited from further extending towards the two ends, the stress of the extension spring can be prevented from exceeding the elastic range of the spring, and the situation that the elasticity fails due to overlarge stress is avoided. Therefore, the embodiment can ensure that the tensile force of the extension spring can be better kept in the axial direction, and avoids damage caused by tensile deformation; meanwhile, the two ends of the extension spring can play a good role in buffering and protecting when being impacted by external force; in addition, the stress of the extension spring can be prevented from exceeding the elastic range of the spring, and the situation that the elasticity fails due to overlarge stress is avoided.

Further, in order to improve the bearing strength of the spring, in this embodiment, the spring body 1 is a spring structure made of high-carbon steel.

Further, for preventing the spring phenomenon of skidding takes place when tensile, in this embodiment, wavy protruding structure is all seted up to rings 4's medial surface.

Further, in order to improve the corrosion resistance and the wear resistance of the spring, in this embodiment, the outer surface of the spring body 1 is sequentially sprayed with a silicon carbide wear-resistant coating and a zinc yellow anti-rust paint layer from inside to outside.

Further, for avoiding the direct collision of stopper 511 and joint piece 521 when the contact takes place for the reaction, in this embodiment, stopper 511 and joint piece 521's surface all overlaps and is equipped with the rubber cushion cover.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. An extension spring, includes spring body (1) of constituteing by a plurality of helicoidal, its characterized in that:

the spring comprises a spring body (1), wherein a first mounting plate (2) and a second mounting plate (3) are respectively arranged at two ends of the spring body (1), the two ends of the spring body (1) are respectively fixed between the first mounting plate (2) and the second mounting plate (3) in a welding mode, rings (4) of circular ring structures are welded on the first mounting plate (2) and the second mounting plate (3), one of the rings (4) and the spring body (1) are installed on the opposite surface of the first mounting plate (2), the other ring (4) and the spring body (1) are installed on the opposite surface of the second mounting plate (3), the spring body (1) comprises a tip spring body (11) at two ends and a middle spring body (12), the tip spring body (11) and the middle spring body (12) are of an integrally formed structure, the distance between the corresponding positions of two adjacent spiral rings of the tip spring body (11) is 0.5cm-1.5cm, the diameter between two adjacent helicoids of tip spring body (11) is followed the tip of spring body (1) becomes to the middle part grow gradually, the distance between two adjacent helicoids of middle part spring body (12) corresponding position is 0, the diameter between two adjacent helicoids of middle part spring body (12) is unanimous, the diameter between two adjacent helicoids of middle part spring body (12) equals the maximum diameter between two adjacent helicoids of tip spring body (11), be provided with limit structure (5) in the hole of spring body (1), limit structure (5) are fixed between mounting panel (2) and No. two mounting panels (3) at spring body (1) both ends, limit structure (5) include dead lever (51) and movable rod (52), the one end vertical welding of dead lever (51) is in on No. two mounting panels (3), the other end extends to the position near the first mounting plate (2), two symmetrically arranged limiting blocks (511) are welded on the side surface of the top of the fixed rod (51), the central position of the limiting block (511) is provided with a circular through hole along the axial direction of the fixed rod (51), the aperture of circular through-hole is greater than the diameter of movable rod (52), movable rod (52) are two, two the equal vertical welding of one end of movable rod (52) is in No. two mounting panels (3) are last, two the other end of movable rod (52) passes respectively two at dead lever (51) top the circular through-hole of stopper (511) extends to near mounting panel (2), two joint piece (521) of cake shape structure are all installed at the top of movable rod (52), the diameter of joint piece (521) is greater than the aperture of circular through-hole.

2. An extension spring according to claim 1, wherein: the spring body (1) is of a spring structure made of high-carbon steel.

3. An extension spring according to claim 1, wherein: the inner side surface of the hanging ring (4) is provided with wavy protruding structures.

4. An extension spring according to claim 1, wherein: the outer surface of the spring body (1) is sequentially coated with a silicon carbide wear-resistant coating and a zinc yellow anti-rust paint layer from inside to outside.

5. An extension spring according to claim 1, wherein: the outer surfaces of the limiting block (511) and the clamping block (521) are all sleeved with rubber buffer sleeves.