CN214788733U - Double-layer spring - Google Patents
Double-layer spring Download PDFInfo
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- CN214788733U CN214788733U CN202120838092.6U CN202120838092U CN214788733U CN 214788733 U CN214788733 U CN 214788733U CN 202120838092 U CN202120838092 U CN 202120838092U CN 214788733 U CN214788733 U CN 214788733U
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- telescopic rod
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Abstract
The utility model relates to the technical field of springs, in particular to a double-layer spring, which comprises an outer spring barrel, a telescopic rod, a transition spring and an inner spring barrel; the outer spring barrel is formed by a plurality of turns wound and arranged along a spiral axis; the telescopic rod is arranged on the inner side of the outer spring barrel and is coaxial with the outer spring barrel, and the telescopic rod comprises a first part and a second part which are mutually sleeved and connected; the two axial ends of the outer spring barrel are respectively fixed on the first part and the second part through transition springs; the inner spring cylinder is a special-shaped spring, the inner spring cylinder is coaxially arranged on the outer side of the telescopic rod and on the inner side of the outer spring cylinder, and two axial ends of the inner spring cylinder are respectively connected with the first part and the second part. The utility model discloses simple structure can prevent effectively that double spring from taking place the lateral buckling when receiving from last oblique pressure effect extremely down.
Description
Technical Field
The utility model relates to a spring technical field, in particular to double-deck spring.
Background
In the prior art, the double-layer spring belongs to one of the special-shaped springs, and is mainly suitable for some special use scenarios, such as a double-layer conjoined spring disclosed in patent CN109730488A, and because the double-layer spring is composed of two independent springs or two conjoined springs, the elasticity of the double-layer spring is larger than that of a single-layer spring. But when double-deck spring received oblique pressure, the spring took place to buckle easily and causes inlayer spring and outer spring to take place to interfere at the side direction deformation in-process, or leads to inlayer spring and outer spring to take place to twine for the spring is difficult to resume deformation to original state, leads to the spring to reduce or lose the cushioning effect.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: a double-layer spring capable of preventing lateral bending is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: a double-layer spring comprises an outer spring barrel, a telescopic rod, a transition spring and an inner spring barrel;
the outer spring barrel is formed by a plurality of turns wound and arranged along a spiral axis;
the telescopic rod is arranged on the inner side of the outer spring barrel and is coaxial with the outer spring barrel, and the telescopic rod comprises a first part and a second part which are mutually sleeved and connected;
the two axial ends of the outer spring barrel are respectively fixed on the first part and the second part through transition springs;
the inner spring cylinder is a special-shaped spring, the inner spring cylinder is coaxially arranged on the outer side of the telescopic rod and on the inner side of the outer spring cylinder, and two axial ends of the inner spring cylinder are respectively connected with the first part and the second part.
Wherein the inner spring barrel includes a plurality of large radius turns and a plurality of small radius turns wound along a helical axis, the plurality of large radius turns and the plurality of small radius turns being alternately arranged in sequence.
Wherein the lead of the outer spring barrel is less than the lead of the inner spring barrel.
The spiral surface of the transition spring is flush with the end surface of the telescopic rod.
The anti-falling structure is arranged on the telescopic rod and used for keeping the first part and the second part connected.
The cross sections of the outer spring barrel, the transition spring and the inner spring barrel are circular or rectangular.
The length of the first part is greater than that of the second part, the second part is a hollow cylinder with two open ends, and a buffer pad is arranged on the lower opening of the second part.
The beneficial effects of the utility model reside in that: the telescopic rod is arranged on the inner side of the double-layer spring to limit the telescopic direction of the double-layer spring, so that the double-layer spring is effectively prevented from being bent laterally under the action of oblique pressure, and the service life of the double-layer spring is prolonged; the inner spring barrel is arranged in the outer spring barrel, so that the buffering effect of the double-layer spring is improved.
Drawings
Fig. 1 is a schematic structural view of a double-layer spring according to an embodiment of the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Description of reference numerals: 1. an outer spring barrel; 2. a transition spring; 3. an inner spring barrel; 4. a telescopic rod; 41. a first portion; 42. a second portion.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the first part and the second part of the telescopic rod are respectively connected with the two axial ends of the outer spring cylinder and the inner spring cylinder, so that the deformation directions of the outer spring cylinder and the inner spring cylinder are limited.
Referring to fig. 1 and 2, the present invention is: a double-layer spring comprises an outer spring barrel 1, a telescopic rod 4, a transition spring 2 and an inner spring barrel 3; the outer spring tube 1 is formed by a plurality of turns which are wound and arranged along a spiral axis; the telescopic rod 4 is arranged on the inner side of the outer spring barrel 1 and is coaxially arranged with the outer spring barrel 1, and the telescopic rod 4 comprises a first part 41 and a second part 42 which are mutually sleeved and connected; the two axial ends of the outer spring barrel 1 are respectively fixed on the first part 41 and the second part 42 through transition springs 2; the inner spring cylinder 3 is a special-shaped spring, the inner spring cylinder 3 is coaxially arranged at the outer side of the telescopic rod 4 and at the inner side of the outer spring cylinder 1, and the two axial ends of the inner spring cylinder 3 are respectively connected with the first part 41 and the second part 42.
Specifically, the utility model discloses a theory of operation does: when the outer spring cylinder 1 is subjected to oblique pressure from top to bottom, the outer spring cylinder 1 is subjected to lateral deformation under the action of pressure, and is connected with the first part 41 of the telescopic rod 4 through the transition spring 2, so that the first part 41 moves in an inner cavity surrounded by the side wall of the second part 42 along the axial direction of the second part 42 through the transition spring 2, and meanwhile, as the axial end of the inner spring cylinder 3 is also connected with the first part 41, the first part 41 drives the inner spring cylinder 3 to deform along the axial direction of the telescopic rod 4 through the first part 41 in the moving process of the first part 41, and the conversion of the external oblique pressure to the elastic potential energy of the spring is realized.
From the above description, the beneficial effects of the present invention are: the telescopic rod 4 is arranged on the inner side of the double-layer spring to limit the telescopic direction of the double-layer spring, so that the double-layer spring is effectively prevented from being bent laterally under the action of oblique pressure, and the service life of the double-layer spring is prolonged; the buffering effect of the double-layer spring is improved by arranging the inner spring barrel 3 in the outer spring barrel 1.
Optionally, the transition spring 2 and the inner spring barrel 3 are both welded to the telescopic rod 4.
Optionally, a ferrule is disposed at the end of the transition spring 2, the upper end of the telescopic rod 4 penetrates through the ferrule, a protrusion protruding from the surface of the telescopic rod 4 and perpendicular to the axis of the telescopic rod is disposed on the telescopic rod 4, and the ferrule is restricted from being separated from the telescopic rod 4 by the cooperation of the protrusion and the ferrule.
Preferably, the outer spring barrel 1, the transition spring 2 and the inner spring barrel 3 are all made of 65Mn spring steel.
Further, the inner spring tube 3 includes a plurality of large radius turns and a plurality of small radius turns wound along the helical axis, and the plurality of large radius turns and the plurality of small radius turns are alternately arranged in sequence.
As can be seen from the above description, the deformation energy of the inner spring shell 3 is increased by providing the inner spring shell 3 as a shaped spring with alternating turns of large and small radii.
Further, the lead of the outer spring barrel 1 is smaller than the lead of the inner spring barrel 3.
As can be seen from the above description, by further limiting the lead of the outer spring barrel 1 to be less than the lead of the inner spring barrel 3, it is avoided that the amount of compression of the outer spring barrel 1 is limited by the lead of the inner spring barrel 3.
Furthermore, the spiral surface of the transition spring 2 is flush with the end surface of the telescopic rod 4.
As can be seen from the above description, the transition spring 2 is limited to have a rotation surface flush with the end surface of the telescopic rod 4, so that the user can conveniently install the spring.
It should be noted that the transition spring 2 may be a flat spiral or a conical spiral, when the transition spring 2 is a flat spiral, the rotation surface is a plane where the axis of the spring wire is located, and when the transition spring 2 is a conical spiral, the rotation surface is a plane where the axis of the spring wire with the smallest radius turns is located.
Further, the telescopic rod 4 is provided with a retaining structure for keeping the first part 41 and the second part 42 connected.
From the above description, it can be seen that the anti-falling structure is provided on the telescopic rod 4 to prevent the first part 41 from falling off from the inner cavity of the second part 42 when the spring is subjected to an axial tension, thereby causing the loss of the anti-bending effect of the spring.
Preferably, the anti-dropping structure is a combination of a bump and a sliding groove.
Further, the cross sections of the outer spring barrel 1, the transition spring 2 and the inner spring barrel 3 are all circular or rectangular.
Further, the length of the first portion 41 is greater than that of the second portion 42, the second portion 42 is a hollow cylinder with two open ends, and a cushion pad is disposed on the lower opening of the second portion 42.
As can be seen from the above description, by providing the second portion 42 as a hollow structure with two open ends, and further providing a buffer pad at the lower end opening of the second portion 42, when the axial pressure applied to the spring is too large, the end of the first portion 41 can protrude out of the lower end opening of the second portion 42 through the buffer pad, so as to prevent the first portion 41 and the second portion 42 from bending due to the structural limitation of the second portion 42 under the action of the too large axial pressure, and make it difficult for the spring to return to the original state.
Example one
Referring to fig. 1 and 2, a double-layer spring comprises an outer spring barrel 1, a telescopic rod 4, a transition spring 2 and an inner spring barrel 3; the outer spring tube 1 is formed by a plurality of turns which are wound and arranged along a spiral axis; the telescopic rod 4 is arranged on the inner side of the outer spring barrel 1 and is coaxially arranged with the outer spring barrel 1, and the telescopic rod 4 comprises a first part 41 and a second part 42 which are mutually sleeved and connected; both axial ends of the outer spring barrel 1 are welded on the first part 41 and the second part 42 respectively through transition springs 2; the inner spring cylinder 3 is a special-shaped spring, the inner spring cylinder 3 is coaxially arranged at the outer side of the telescopic rod 4 and at the inner side of the outer spring cylinder 1, and two axial ends of the inner spring cylinder 3 are respectively welded on the first part 41 and the second part 42.
The inner spring barrel 3 comprises a plurality of large radius turns and a plurality of small radius turns which are wound along the spiral axis, and the plurality of large radius turns and the plurality of small radius turns are sequentially and alternately arranged; the lead of the outer spring barrel 1 is smaller than that of the inner spring barrel 3; the spiral surface of the transition spring 2 is flush with the end surface of the telescopic rod 4.
The first part 41 is provided with a convex block, the second part 42 is provided with a sliding groove, the upper end of the sliding groove is sealed, the lower end of the sliding groove is open, the convex block is in sliding connection with the sliding groove, and the convex block is limited by the upper end of the sliding groove and limited in the sliding groove.
The cross sections of the outer spring barrel 1, the transition spring 2 and the inner spring barrel 3 are all circular.
The length of the first part 41 is greater than that of the second part 42, the second part 42 is a hollow cylinder with two open ends, and a buffer pad is arranged on the lower end opening of the second part 42.
In summary, the utility model provides a double-layer spring, which limits the expansion direction of the double-layer spring by arranging the expansion link 4 at the inner side of the double-layer spring, effectively prevents the double-layer spring from lateral bending when the double-layer spring is under the action of oblique pressure, and prolongs the service life of the double-layer spring; the inner spring barrel 3 is arranged in the outer spring barrel 1, so that the buffering effect of the spring is improved; the inner spring cylinder 3 is set to be a special-shaped spring with alternating large and small radius turns so as to improve the deformation energy of the inner spring cylinder 3; by further limiting the lead of the outer spring barrel 1 to be less than the lead of the inner spring barrel 3, the compression amount of the outer spring barrel 1 is prevented from being limited by the lead of the inner spring barrel 3; by arranging the second part 42 as a hollow structure with two open ends and further arranging a buffer pad at the lower end opening of the second part 42, when the axial pressure applied to the spring is too large, the end of the first part 41 can protrude out of the lower end opening of the second part 42 through the buffer pad, so that the first part 41 and the second part 42 are prevented from bending due to the structural limitation of the second part 42 under the action of the too large axial pressure, and the double-layer spring is difficult to return to the original state.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (7)
1. A double-layer spring is characterized by comprising an outer spring barrel, a telescopic rod, a transition spring and an inner spring barrel;
the outer spring barrel is formed by a plurality of turns wound and arranged along a spiral axis;
the telescopic rod is arranged on the inner side of the outer spring barrel and is coaxial with the outer spring barrel, and the telescopic rod comprises a first part and a second part which are mutually sleeved and connected;
the two axial ends of the outer spring barrel are respectively fixed on the first part and the second part through transition springs;
the inner spring cylinder is a special-shaped spring, the inner spring cylinder is coaxially arranged on the outer side of the telescopic rod and on the inner side of the outer spring cylinder, and two axial ends of the inner spring cylinder are respectively connected with the first part and the second part.
2. The double layer spring according to claim 1, wherein said inner spring shell comprises a plurality of large radius turns and a plurality of small radius turns wound along a helical axis, said plurality of large radius turns and said plurality of small radius turns alternating in sequence.
3. The dual-layer spring of claim 1, wherein the lead of the outer spring barrel is less than the lead of the inner spring barrel.
4. The double layer spring of claim 1, wherein the helical surface of the transition spring is flush with the end surface of the extension rod.
5. The double-layer spring as claimed in claim 1, wherein the telescopic rod is provided with a retaining structure for keeping the first and second parts connected.
6. The dual layer spring of claim 1, wherein said outer, transition and inner spring barrels are all circular or rectangular in cross-section.
7. The double-layer spring as claimed in claim 1, wherein the length of the first portion is greater than that of the second portion, the second portion is a hollow cylinder with two open ends, and a cushion pad is disposed on the lower end opening of the second portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120838092.6U CN214788733U (en) | 2021-04-22 | 2021-04-22 | Double-layer spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120838092.6U CN214788733U (en) | 2021-04-22 | 2021-04-22 | Double-layer spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214788733U true CN214788733U (en) | 2021-11-19 |
Family
ID=78688671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120838092.6U Active CN214788733U (en) | 2021-04-22 | 2021-04-22 | Double-layer spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214788733U (en) |
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2021
- 2021-04-22 CN CN202120838092.6U patent/CN214788733U/en active Active
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