Compression spring

Abstract

The utility model discloses a pressure spring which comprises a pressure spring body, the pressure spring body comprises tightening wire rings and supporting wire rings, and the pressure spring is characterized in that the pitch between the supporting wire rings of the pressure spring body is gradually reduced from the middle to the two ends; according to the pressure spring, the pitch between the supporting wire rings is gradually reduced from the middle to the two ends, so that the perpendicularity of the pressure spring body is increased, the phenomenon that due to insufficient perpendicularity, friction is generated between the pressure spring body and other components or between the wire rings of the pressure spring body in the braking process of the pressure spring body, noise is generated, and the wire rings are abraded is avoided, and the service life of the pressure spring body is prolonged. The service life of the pressure spring is prolonged; and meanwhile, due to different pitches, the pressure spring body has multiple gears of different loads, and each wire ring has different loads.

Description

TECHNICAL FIELD

[0001] The utility model relates to spring technology field, concretely is a compression spring. BACKGROUND

[0002] Compression spring as brake part, for the perpendicularity and load capacity of silk circle all have very high request, the perpendicularity of upper and lower end of existing compression spring has slight deviation, compression spring upper end is small and lower end is big, make the diameter of silk circle is not identical, lead to in the braking process, compression spring and other parts or silk circle of compression spring and silk circle produce friction and emit abnormal sound, long time friction leads to compression spring wear, influence brake effect, reduce the service life of compression spring, for this, put forward a kind of compression spring. SUMMARY

[0003] The utility model mainly aims at providing can effectively solve the problem in background art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a compression spring, comprising a compression spring body, the compression spring body comprises a supporting silk circle and a tightening silk circle, characterized in that: the pitch between the supporting silk circles of the compression spring body gradually decreases from the middle to both ends.

[0005] Preferably, the tightening silk circle is arranged at both ends of the supporting silk circle.

[0006] Preferably, the number of the tightening silk circles is greater than or equal to one-third of the number of the adjacent supporting silk circles.

[0007] The utility model has the following beneficial effects: by gradually decreasing the pitch between the supporting silk circles from the middle to both ends, the perpendicularity of the compression spring body is increased, and the friction between the compression spring body and other parts or the silk circles of the compression spring body during braking due to insufficient perpendicularity is avoided, thereby preventing noise and silk circle wear, and the service life of the compression spring is increased; meanwhile, different pitches enable the compression spring body to have different loads at different gears, so that each silk circle has different loads. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is the overall structure schematic view of the utility model;

[0009] Figure 2 is the top view of the utility model.

[0010] Legend: 1, compression spring body; 2, tightening silk circle; 3, supporting silk circle. DETAILED DESCRIPTION

[0011] To make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0012] As Figure 2 shown in the figure, a compression spring, comprising a compression spring body 1, the compression spring body 1 comprising and supporting the wire ring 2 and the wire ring 3, characterized in that: the pitch between the supporting wire ring 3 and the supporting wire ring 3 of the compression spring body 1 gradually decreases from the middle to both ends; by gradually decreasing the pitch between the supporting wire ring 3 and the supporting wire ring 3 from the middle to both ends, the perpendicularity of the compression spring body 1 is increased, avoiding the insufficient perpendicularity of the compression spring body 1 during the braking process, the friction between the compression spring body 1 and other components or the wire ring and the wire ring of the compression spring body 1, thereby causing the generation of noise and the wear of the wire ring, increasing the service life of the compression spring; at the same time, different pitches make the compression spring body 1 have different loads in multiple gears, so that each wire ring has different loads.

[0013] In one embodiment, the supporting wire ring 2 is arranged at both ends of the supporting wire ring 3.

[0014] In one embodiment, the number of the supporting wire ring 2 is greater than or equal to one third of the number of the supporting wire ring 3 adjacent to it.

[0015] When the utility model is used, the supporting wire ring 2 at both ends of the compression spring body 1 is connected with the components on the electric vehicle, when the electric vehicle brakes, the compression spring body 1 is subjected to pressure, the pitch between the supporting wire ring 3 and the supporting wire ring 3 decreases until the wire ring and the wire ring contact; when the electric vehicle completes the braking, the compression spring body 1 returns to the original state.

[0016] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A compression spring, comprising a compression spring body (1), said compression spring body (1) comprising a tension coil (2) and a support coil (3), characterized in that: The pitch between the support coil (3) and the support coil (3) of the compression spring body (1) gradually decreases from the middle to both ends.

2. A compression spring according to claim 1, characterized in that: The aforementioned coiled wire (2) is disposed at both ends of the support coil (3).

3. A compression spring according to claim 1, characterized in that: The number of tight turns of the tight coil (2) is greater than or equal to one-third of the number of turns of the adjacent support coil (3).

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