CN215059059U - Spiral compression spring - Google Patents
Spiral compression spring Download PDFInfo
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- CN215059059U CN215059059U CN202121147795.0U CN202121147795U CN215059059U CN 215059059 U CN215059059 U CN 215059059U CN 202121147795 U CN202121147795 U CN 202121147795U CN 215059059 U CN215059059 U CN 215059059U
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- compression spring
- spring
- helical compression
- circles
- end rings
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Abstract
The utility model provides a helical compression spring, includes two end rings and is located a plurality of main part circles between two end rings, and the central axis of two end rings and a plurality of main part circles is located same straight line, and the external diameter of two end rings equals, and the external diameter of a plurality of main part circles is less than the external diameter of two end rings. The utility model discloses still can keep the straightness accuracy of spring under limit working stroke.
Description
Technical Field
The utility model relates to a spring technique.
Background
The conventional power-assisted return spring for an automobile brake booster pump is a traditional cylindrical spring, and the structure of the conventional power-assisted return spring is shown in fig. 1. The outer diameters of the two end rings 91 of the cylindrical spring are equal to the outer diameters of the plurality of body rings 93 located between the two end rings 91. The free height of the cylindrical spring is 114mm, the total number of turns is 5.8 turns, the installation height is 67.0mm, the working height is 27.0mm, and the working stroke is 40.0 mm. When the brake booster pump is used, one end of the cylindrical spring is fixed on a pump shell of the brake booster pump, the other end of the cylindrical spring is fixed on the spring seat, the unstable lateral bending phenomenon is easily generated under a large stroke state, and the maximum bending degree can reach 2.3mm, so that abnormal rubbing sound is generated between the spring and the pump shell.
Disclosure of Invention
The utility model aims to solve the technical problem that a helical compression spring is provided, its straightness accuracy that still can keep the spring under limit working stroke.
The utility model discloses a helical compression spring, including two end rings and be located a plurality of main part circles between two end rings, the central axis of two end rings and a plurality of main part circles is located same straight line, and the external diameter of two end rings equals, and the external diameter of a plurality of main part circles is less than the external diameter of two end rings.
The coil compression spring, wherein the number of turns of the coil compression spring is less than 10.
The helical compression spring, wherein the free height of the helical compression spring is 114mm, and the number of turns is 6.6.
The utility model discloses at least, have following advantage:
1. the outer diameters of a plurality of main body rings of the spiral compression spring provided by the embodiment of the utility model are smaller than the outer diameters of two end rings, so that the overall shape of the spring is changed, the spring is deformed into a shape with a concave middle part by the existing cylinder, the situation that the middle part of the spring is bent to one side under the working condition using stroke due to the small total number of the spring rings and the large clearance between the main body rings can be reduced, and the spring can still keep better straightness even if working in the limit stroke;
2. the total number of turns of the spring is increased to 6.6 turns from the existing 5.8 turns, so that the gap between the turns of the spring is reduced, the overall stability of the spring in a free state is improved, and the mutation of the middle part of the spring in the working stroke is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive effort.
Fig. 1 shows a schematic diagram of a power return spring of a conventional brake booster pump for an automobile.
Fig. 2 shows a schematic view of a helical compression spring according to an embodiment of the invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Fig. 2 shows a schematic view of a helical compression spring according to an embodiment of the invention. Referring to fig. 2, according to an embodiment of the present invention, the helical compression spring includes two end rings 11 and a plurality of main body rings 13 located between the two end rings 11, central axes of the two end rings 11 and the plurality of main body rings 13 are located on the same straight line, outer diameters of the two end rings 11 are equal, outer diameters of the plurality of main body rings 13 are equal, and the outer diameters of the plurality of main body rings 13 are smaller than the outer diameters of the two end rings 11. The structure enables the middle part of the spring to be concave, can reduce the situation that the middle part of the spring bends towards one side under the large-stroke state, and enables the spring to work in the limit stroke and still keep good straightness.
In the present embodiment, the outer diameter D1 of each end ring 11 is 49.2mm to 49.8mm, and the outer diameter D2 of each main body ring 13 is 48.2mm to 48.8 mm. The free height H of the helical compression spring is 114mm and the number of turns is 6.6. Compared with the existing spiral compression spring with 5.8 turns for the brake booster pump, the overall stability of the spring in a free state is improved and the mutability of the middle part of the spring in a working stroke is reduced due to the fact that gaps among the turns of the spring are reduced.
In other embodiments, the number of turns of the helical compression spring of the present embodiment may be 7.6 turns, etc., but is preferably less than 10 turns.
The spiral compression spring can be used as an assistance return spring of the automobile brake booster pump, and due to the fact that lateral bending is reduced, abnormal rubbing between the spring and a pump shell of the brake booster pump can be avoided.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. The utility model provides a helical compression spring, includes two end circles and is located a plurality of main part circles between two end circles, two end circles and the central axis of a plurality of main part circles is located same straight line, the external diameter of two end circles equals, its characterized in that, the external diameter of a plurality of main part circles equals, just the external diameter of a plurality of main part circles is less than the external diameter of two end circles.
2. A helical compression spring as claimed in claim 1, wherein said helical compression spring has less than 10 turns.
3. A helical compression spring as claimed in claim 1 wherein said helical compression spring has a free height of 114mm and 6.6 turns.
4. The helical compression spring as claimed in claim 1, wherein each of said end coils has an outer diameter of 49.2mm to 49.8mm and each of said main body coils has an outer diameter of 48.2mm to 48.8 mm.
5. A helical compression spring as claimed in any one of claims 1 to 4 wherein said helical compression spring is a power return spring of an automotive brake booster pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121147795.0U CN215059059U (en) | 2021-05-26 | 2021-05-26 | Spiral compression spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121147795.0U CN215059059U (en) | 2021-05-26 | 2021-05-26 | Spiral compression spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215059059U true CN215059059U (en) | 2021-12-07 |
Family
ID=79211139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121147795.0U Active CN215059059U (en) | 2021-05-26 | 2021-05-26 | Spiral compression spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215059059U (en) |
-
2021
- 2021-05-26 CN CN202121147795.0U patent/CN215059059U/en active Active
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