CN201953875U - Air valve spring with material cross section profile protruded toward inner side - Google Patents
Air valve spring with material cross section profile protruded toward inner side Download PDFInfo
- Publication number
- CN201953875U CN201953875U CN2010205407187U CN201020540718U CN201953875U CN 201953875 U CN201953875 U CN 201953875U CN 2010205407187 U CN2010205407187 U CN 2010205407187U CN 201020540718 U CN201020540718 U CN 201020540718U CN 201953875 U CN201953875 U CN 201953875U
- Authority
- CN
- China
- Prior art keywords
- cross
- section
- spring
- section profile
- valve spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Springs (AREA)
Abstract
The utility model discloses an air valve spring with material cross section profile protruded toward the inner side. Service life of an air valve spring prepared from material with circular cross section by the prior technology is short. The utility model is wound into a helical coil by wire, and is characterized in that the curvature radius of the inner portion of the wire cross section profile is smaller than the curvature radius of the outer portion thereof, and thus the wire cross section profile protrudes toward the inner side (called oval cross section for short). The utility model changes cross section of the spring material from circle into navette, and thus the stress distribution at inner and outer sides is effectively changed under the precondition of keeping the cross section area unchanged, the stress at inner side of the spring is decreased which enables the stress distribution of the cross section to change from eccentric circles to approximate concentric circles, so spring material performance is fully utilized, and usage life of the spring is prolonged.
Description
Technical field
The utility model belongs to spring, the valve spring that a kind of specifically material section profile protrudes to the inside.
Background technique
In the running of motor, the effect of valve spring is to cooperate with valve cam, guarantees the characteristics of motion opening and closing that valve is determined according to the valve cam contour shape in whole distribution process.Based on the handling characteristics of product, determined that valve spring need have very high fatigue life.
Valve spring 1 its sectional shape of material commonly used is circular (referring to Fig. 1), when spring stress (as pressure), the inboard suffered stress of spring material is greater than the stress in the outside, its stress distribution is referring to Fig. 2, hatching partly is the circular cross-section 2 of spring material in the middle of among Fig. 2, the direction of stress when the arrow that radially distributes around the circular cross-section 2 is spring stress, the length of arrow is the relative size of stress, as seen from the figure, stress varies in size each position of cross-sectional periphery, especially inboard maximum, the outside is minimum, the distribution of stress forms an ellipse, and the phenomenon of this stress distribution inequality can cause the spring inboard to reach fatigue life early than the outside, cause the performance of spring material not bring into play fully, and the fatigue life of spring is shorter.
Summary of the invention
The technical assignment of the technical problems to be solved in the utility model and proposition is that the lower defective of valve spring life-span that prior art makes with the circular cross-section material, the valve spring that provides a kind of material section profile to protrude to the inside are provided.
The technical problem that the utility model proposes for solution, the technical solution adopted in the utility model is: the valve spring that a kind of material section profile protrudes to the inside, it turns to helical by wire rod, it is characterized in that: the radius of curvature of the inside part of the cross section profile of described wire rod makes the whole cross section profile of wire rod be convex shape (can be called for short this cross section is oval cross section) to the inside less than the radius of curvature of external lateral portion.
Especially, the radius of curvature minimum of the medial roof end position of the cross section profile of described wire rod.The inside part of the cross section profile of described wire rod is an oval part, and its long axis direction is consistent with the diametric(al) of spring; The external lateral portion of the cross section profile of described wire rod is the part of circle; Described inside part and external lateral portion seamlessly transit.
The utility model is changed into avette by the sectional shape with spring material by circle, can be under the prerequisite that the material section area equates, the stress distribution situation in the outside in when changing spring work effectively, reduce the stress of spring inboard, make the stress distribution in spring material cross section become approximate concentric circle by eccentric circle, thereby the performance of spring material is fully utilized, has improved the working life of spring.
Description of drawings
The valve spring that Fig. 1 makes for the circular cross-section spring material.
Fig. 2 is valve spring shown in Figure 1 stress distribution schematic representation on the material section when stressed.
The valve spring that Fig. 3 makes for the utility model oval cross section spring material.
Fig. 4 is valve spring shown in Figure 3 stress distribution schematic representation on the material section when stressed.
Number in the figure explanation: the valve spring that 1-circular cross-section material makes, 2-circular cross-section, the valve spring that 3-oval cross section material makes, 4-oval cross section, 5-inside part, 6-external lateral portion, the inboard top of 7-cross section profile.
Embodiment
Below in conjunction with Figure of description the utility model is described further.
Shown in Fig. 3,4, the valve spring 3 that material section profile of the present utility model protrudes to the inside, turn to helical by wire rod, the radius of curvature of the inside part 5 of the cross section profile of wire rod makes the whole cross section profile of wire rod be convex shape (can be called for short this cross section is oval cross section 4) to the inside less than the radius of curvature of external lateral portion 6.Further, the radius of curvature minimum of the medial roof end position 7 of the cross section profile of wire rod.The inside part 5 of the cross section profile of wire rod is an oval part, and its long axis direction is consistent with the diametric(al) of spring; The external lateral portion 6 of the cross section profile of wire rod is the part of circle; Inside part 5 seamlessly transits with external lateral portion 6.
When spring stress (as pressure), the inboard suffered stress of this oval cross section spring material reduces to some extent with respect to the circular cross-section spring material, its stress distribution is referring to Fig. 4, hatching partly is the oval cross section 4 of this spring material in the middle of among Fig. 4, the direction of stress when the arrow that radially distributes around the oval cross section 4 is spring stress, the length of arrow is the relative size of stress, as seen from the figure, stress reaches unanimity in the size at each position of cross-sectional periphery, the distribution convergence of stress is circular, comparatively even, owing to reduced the maximum stress point on the material section, thereby can improve the stress design level of material effectively, given full play to the potential of spring material, accomplish the light-weight design of product, and prolonged the fatigue life of spring.
Claims (3)
1. valve spring (3) that the material section profile protrudes to the inside, it turns to helical by wire rod, it is characterized in that: the radius of curvature of the inside part of the cross section profile of described wire rod (5) makes the whole cross section profile of wire rod be convex shape to the inside less than the radius of curvature of external lateral portion (6).
2. the valve spring that a kind of material section profile according to claim 1 protrudes to the inside is characterized in that: the radius of curvature minimum of the medial roof end position (7) of the cross section profile of described wire rod.
3. the valve spring that a kind of material section profile according to claim 1 and 2 protrudes to the inside is characterized in that: the inside part of the cross section profile of described wire rod (5) is an oval part, and its long axis direction is consistent with the diametric(al) of spring; The external lateral portion of the cross section profile of described wire rod (6) is the part of circle; Described inside part (5) seamlessly transits with external lateral portion (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205407187U CN201953875U (en) | 2010-09-25 | 2010-09-25 | Air valve spring with material cross section profile protruded toward inner side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205407187U CN201953875U (en) | 2010-09-25 | 2010-09-25 | Air valve spring with material cross section profile protruded toward inner side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201953875U true CN201953875U (en) | 2011-08-31 |
Family
ID=44497985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205407187U Expired - Fee Related CN201953875U (en) | 2010-09-25 | 2010-09-25 | Air valve spring with material cross section profile protruded toward inner side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201953875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503330A (en) * | 2021-06-29 | 2021-10-15 | 上海宇航系统工程研究所 | Long-life planar spiral spring for space |
-
2010
- 2010-09-25 CN CN2010205407187U patent/CN201953875U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503330A (en) * | 2021-06-29 | 2021-10-15 | 上海宇航系统工程研究所 | Long-life planar spiral spring for space |
| CN113503330B (en) * | 2021-06-29 | 2023-04-14 | 上海宇航系统工程研究所 | Long-life planar spiral spring for space |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108138977A (en) | Poppet | |
| EP2559928A1 (en) | Corrugated pipe sealing assembly and corrugated pipe valve having the same | |
| CN201953875U (en) | Air valve spring with material cross section profile protruded toward inner side | |
| CN203783672U (en) | Intake valve seat ring of automobile engine | |
| CN103459172A (en) | Piston for an air spring | |
| CN104131852A (en) | Cylindrical hydraulic tappet | |
| CN203906533U (en) | Curved tie-rod spherical shell | |
| CN204357516U (en) | Automotive engine valves rocking arm indenter device | |
| CN204152577U (en) | A kind of column formula hydraulic tappet | |
| CN101893107B (en) | Valve pocket positioning structure of multi-redundancy slide valve | |
| CN204615551U (en) | A kind of plastic packaging motor | |
| CN204937812U (en) | A kind of modularization inward turning bottle stopper | |
| CN204900008U (en) | Valve spring | |
| CN106014935A (en) | Air inlet joint and inner unloading device for automobile air compressor | |
| CN209365784U (en) | A kind of rubber tyre | |
| CN202467950U (en) | Assembled camshaft | |
| CN202646681U (en) | Sealing ring and screw compressor with sealing ring | |
| CN104033481A (en) | Curled drag link ball shell | |
| CN105240080A (en) | Double-cavity sodium-filled valve with spiral blade | |
| CN110513416A (en) | A kind of detachable rubber bushing structure and its rigidity-changing method | |
| CN203394994U (en) | Spin-riveting-free spherical hinge for vehicle | |
| CN205315819U (en) | Piston type cylinder | |
| CN204587012U (en) | Automobile-use hangs spherical shell | |
| CN206086863U (en) | Automobile steering pump valve rod | |
| CN204312206U (en) | The sealing configuration of the camshaft hole on a kind of cylinder cover of automobile engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20110925 |