Tensile spring

Abstract

The utility model provides a tensile spring, and belongs to the field of springs. The telescopic spring solves the problem that the service life of a spring is shortened due to fatigue of the spring caused by long-time contraction and stretching of the spring, comprises a main shaft I, a main shaft II and a spring main body, and is characterized in that a sleeve connected with the main shaft I is arranged on the outer side of the main shaft I, a telescopic part connected with the main shaft II is arranged on the outer side of the main shaft II, and the telescopic part is connected with the main shaft II. A plurality of first channels are formed in the sleeve, a plurality of matching parts which are connected with the telescopic part and matched with the first channels are arranged on the outer side of the telescopic part, second channels are formed in the matching parts, sliding rings are arranged in the first channels, and limiting plates used for limiting the sliding rings are arranged on the first channels. A plurality of first springs and a plurality of second springs are connected to the two sides of the sliding ring, the first springs are located in the first channels, and the second springs are located in the second channels.

Description

TECHNICAL FIELD

[0001] The utility model belongs to spring field, and particularly relates to a tensile spring. BACKGROUND

[0002] The spring in the car repeatedly receives the force of stretching and contraction in the process of driving, and the long-time contraction and stretching of the spring can cause the spring fatigue and reduce the service life of the spring. SUMMARY

[0003] The utility model discloses a kind of tensile springs to solve the above problems in prior art.

[0004] The utility model discloses a kind of tensile springs, including main shaft one, main shaft two and spring main body, it is characterized in that, the cavity one and the cavity two are respectively set in the main shaft one and the main shaft two, the connecting shaft for connecting the main shaft one and the main shaft two is set in the cavity one and the cavity two, the cavity one is provided with limit ring one, the cavity two is provided with limit ring two, the connecting shaft both ends are provided with the limit part that is limited with limit ring one and limit ring two respectively and mutually cooperates;

[0005] The outer side of the main shaft one is provided with the sleeve connected with it, the outer side of the main shaft two is provided with the telescopic part connected with it, the sleeve is provided with a plurality of grooves one, the outer side of the telescopic part is provided with a plurality of cooperation parts connected with the telescopic part and matched with the groove one, the cooperation part is provided with the groove two, the groove one is provided with sliding ring, the groove one is provided with the limiting plate for limiting sliding ring, the both sides of the sliding ring are connected with a plurality of spring one and a plurality of spring two, the spring one is located in the groove one, and the spring two is located in the groove two.

[0006] In the above-mentioned tensile spring, one end of the spring one is connected with the sliding ring, and the other end is connected with the groove bottom of the groove one.

[0007] In the above-mentioned tensile spring, one end of the spring two is connected with the sliding ring, and the other end is connected with the groove bottom of the groove two.

[0008] In the above-mentioned tensile spring, the spring main body is sleeved on the main shaft one and the main shaft two, and the both ends are connected with the bottom of the sleeve and the bottom of the telescopic part respectively.

[0009] Compared with prior art, in the present tensile spring, the force required to be borne by the spring main body is reduced by the assistance of the spring one and the spring two, which greatly increases the service life of the spring main body. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1is the main body schematic diagram of the tensile spring;

[0011] Figure 2 is the cross-sectional view of the tensile spring.

[0012] In the figure, 1, main shaft one; 2, main shaft two; 3, spring main body; 4, cavity one; 5, cavity two; 6, connecting shaft; 7, limiting ring one; 8, limiting ring two; 9, limiting part; 10, sleeve; 11, telescopic part; 12, channel one; 13, matching part; 14, channel two; 15, sliding ring; 16, limiting plate; 17, spring one; 18, spring two. DETAILED DESCRIPTION

[0013] The following is the specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0014] As Figure 1 , Figure 2 shown, the tensile spring comprises a main shaft one 1, a main shaft two 2 and a spring main body 3, the main shaft one 1 and the main shaft two 2 are respectively provided with a cavity one 4 and a cavity two 5, the cavity one 4 and the cavity two 5 are provided with a connecting shaft 6 for connecting the main shaft one 1 and the main shaft two 2, the cavity one 4 is provided with a limiting ring one 7, the cavity two 5 is provided with a limiting ring two 8, and the both ends of the connecting shaft 6 are provided with limiting parts 9 for limiting the limiting ring one 7 and the limiting ring two 8.

[0015] The outer side of the main shaft one 1 is provided with a sleeve 10 connected therewith, the outer side of the main shaft two 2 is provided with a telescopic part 11 connected therewith, the sleeve 10 is provided with a plurality of channel ones 12, the outer side of the telescopic part 11 is provided with a plurality of matching parts 13 connected with the telescopic part 11 and matched with the channel ones 12, the matching part 13 is provided with a channel two 14, the channel one 12 is provided with a limiting ring, and the channel one 12 is provided with a limiting plate 16 for limiting the sliding ring 15, the both sides of the sliding ring 15 are connected with a plurality of spring ones 17 and a plurality of spring twos 18, the spring one 17 is located in the channel one 12, and the spring two 18 is located in the channel two 14.

[0016] When the spring main body 3 is stretched, the main shaft one 1 and the main shaft two 2 move to both sides respectively, at this time, the sliding ring 15 is limited by the limiting plate 16, so that the spring one 17 remains unchanged, and the spring two 18 is stretched during the movement of the telescopic part 11, so that the spring two 18 and the spring main body 3 jointly bear the stretching force;

[0017] When the spring main body 3 is contracted, the telescopic part 11 drives the sliding ring 15 to move into the channel one 12, and simultaneously pushes the spring one 17 to contract, so that the spring one 17 and the spring main body 3 jointly bear the contraction force;

[0018] In the process of stretching and shrinking, spring one 17 and spring two 18 are alternately involved, which increases the service life of spring one 17 and spring two 18.

[0019] Further, one end of spring one 17 is connected with sliding ring 15, and the other end is connected with the groove bottom of channel one 12.

[0020] Further, one end of spring two 18 is connected with sliding ring 15, and the other end is connected with the groove bottom of channel two 14.

[0021] Further, spring main body 3 is sleeved on main shaft one 1 and main shaft two 2, and the two ends are respectively connected with the bottom of sleeve 10 and the bottom of telescopic part 11.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0023] Although the terms such as main shaft one 1, main shaft two 2, spring main body 3, cavity one 4, cavity two 5, connecting shaft 6, limiting ring one 7, limiting ring two 8, limiting part 9, sleeve 10, telescopic part 11, channel one 12, matching part 13, channel two 14, sliding ring 15, limiting plate 16, spring one 17, spring two 18 are used more in this paper, but the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A tension spring, comprising a first main shaft (1), a second main shaft (2), and a spring body (3), characterized in that, The main shaft 1 (1) and the main shaft 2 (2) are respectively provided with cavity 1 (4) and cavity 2 (5). The cavity 1 (4) and the cavity 2 (5) are provided with connecting shaft (6) for connecting the main shaft 1 (1) and the main shaft 2 (2). The cavity 1 (4) is provided with limit ring 1 (7) and the cavity 2 (5) is provided with limit ring 2 (8). Both ends of the connecting shaft (6) are provided with limiting parts (9) that cooperate with the limit ring 1 (7) and the limit ring 2 (8) respectively for limiting. A sleeve (10) is provided on the outside of the main shaft (1) and a telescopic part (11) is provided on the outside of the main shaft (2). A number of channels (12) are provided on the sleeve (10). A number of mating parts (13) are provided on the outside of the telescopic part (11) and are connected to the telescopic part (11) and cooperate with the channels (12). A channel (14) is provided in the mating part (13). A sliding ring (15) is provided in the channel (12). A limiting plate (16) for limiting the sliding ring (15) is provided on the channel (12). A number of springs (17) and springs (18) are connected on both sides of the sliding ring (15). The springs (17) are located in the channel (12) and the springs (18) are located in the channel (14).

2. The tensile spring according to claim 1, characterized in that, One end of the spring (17) is connected to the sliding ring (15), and the other end is connected to the bottom of the groove of the channel (12).

3. A tensile spring according to claim 1, characterized in that, One end of the second spring (18) is connected to the sliding ring (15), and the other end is connected to the bottom of the groove of the second channel (14).

4. A tensile spring according to claim 1, characterized in that, The spring body (3) is sleeved on the main shaft one (1) and the main shaft two (2), and its two ends are respectively connected to the bottom of the sleeve (10) and the bottom of the telescopic part (11).

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