CN117329269A - Timing toothed chain with prestress structure - Google Patents
Timing toothed chain with prestress structure Download PDFInfo
- Publication number
- CN117329269A CN117329269A CN202311465336.0A CN202311465336A CN117329269A CN 117329269 A CN117329269 A CN 117329269A CN 202311465336 A CN202311465336 A CN 202311465336A CN 117329269 A CN117329269 A CN 117329269A
- Authority
- CN
- China
- Prior art keywords
- chain
- chain plate
- plate
- prestress
- seamless
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000005482 strain hardening Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
- F16G15/12—Chain links
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G13/00—Chains
- F16G13/02—Driving-chains
- F16G13/04—Toothed chains
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A timing toothed chain with a pre-stress structure relates to the technical field of chain transmission and comprises a toothed chain structure formed by connecting a guide plate, a chain plate and a pin shaft, wherein pre-stress grooves are formed in the edges of the front side and the back side of the chain plate, and seamless bushings are pressed in mounting holes of the chain plate in an interference mode. The prestress groove designed by the invention is characterized in that prestress is uniformly applied to the peripheral metal tissues of the chain plate along the prestress groove to the two sides of the groove in the metal cold working stamping stage, and the dislocation density of the peripheral metal tissues of the prestress groove subjected to opposite blanking extrusion is increased to cause cold working hardening of metal, so that the surface strength of the engagement position of the chain plate is improved, meanwhile, the continuous development of plastic deformation is limited due to cold working hardening, the safety of the peripheral of the chain plate is further improved, and the chain plate is prevented from being impacted, extruded and damaged by a chain wheel in the using process. By arranging the seamless bushing, the abrasion between the pin shaft and the bushing is further improved.
Description
Technical Field
The invention belongs to the technical field of chain transmission, and particularly relates to a timing toothed chain with a prestress structure.
Background
The chain transmission is a transmission mode for transmitting the motion and power of a driving chain wheel with a special tooth shape to a driven chain wheel with a special tooth shape through a chain, and compared with the belt transmission, the chain transmission has the advantages of no elastic sliding and slipping phenomena, accurate average transmission ratio, reliable work and high efficiency; more and more timing chains of vehicle engines adopt toothed chains as transmission carriers, but in the use process of high-speed transmission, the meshing parts of chain plates are impacted, worn and extruded, namely, after being extruded by chain wheels, metal tissues of the chain plates expand to two sides, and the gaps between the chain plates and the peripheral chain plates are expanded and blocked to form chain link clamping stagnation (chain links cannot rotate); at the same time, the hinge eyes of the link plates are also worn out, resulting in failure of the final chain overall chain elongation.
Disclosure of Invention
The invention discloses a timing toothed chain with a prestress structure, which can meet the working condition characteristics of wear resistance and impact resistance of the timing chain for high-speed transmission through the prestress design aiming at chain plates.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the timing toothed chain with the pre-stress structure comprises a toothed chain structure formed by connecting a guide plate, chain plates and pin shafts, wherein pre-stress grooves are formed in the edges of the front side and the back side of the chain plates, and seamless bushings are pressed in mounting holes of the chain plates in an interference mode.
Preferably, the section of the prestress groove is arc-shaped, the chain plate comprises an inner chain plate and an outer chain plate, and the prestress grooves on the front side and the back side of the chain plate are symmetrically arranged.
Preferably, the prestress groove is formed by opposite impact extrusion through a stamping die and simultaneously punching the front side and the back side of the reverse link plate.
Preferably, the structural relationship between the chain plate and the prestress groove is as follows: the thickness of the selected plate material of the chain plate is H, the arc included angle of the prestress groove on the surface of the chain plate is 120 degrees, the width of the notch of the prestress groove is H.cos 30 degrees, the depth value of the notch is 1/4 of the thickness H of the plate material of the chain plate, and the distance between the center of the prestress groove and the periphery of the chain plate is 1-1.5 times of the width value of the notch.
Preferably, the seamless lining is formed by adopting seamless cold heading, and the seamless lining is subjected to cryogenic treatment or metal infiltration treatment.
Preferably, the interference clearance between the seamless bush and the chain plate hole is 0.06-0.08mm.
Preferably, the two sides of the seamless bush are protruded out of the chain plate body, and the outcrop amount is less than or equal to 0.02mm.
The timing toothed chain with the prestress structure has the beneficial effects that:
1. the prestress groove designed by the invention is characterized in that prestress is uniformly applied to the peripheral metal tissues of the chain plate along the prestress groove to the two sides of the groove in the metal cold working stamping stage, and the dislocation density of the peripheral metal tissues of the prestress groove subjected to opposite blanking extrusion is increased to cause cold working hardening of metal, so that the surface strength of the engagement position of the chain plate is improved, meanwhile, the continuous development of plastic deformation is limited due to cold working hardening, the safety of the peripheral of the chain plate is further improved, and the chain plate is prevented from being impacted, extruded and damaged by a chain wheel in the using process.
2. The seamless bushing is formed by adopting the seamless cold heading, and the seamless bushing is subjected to cryogenic treatment or metal infiltration treatment to increase the surface hardness, resist abrasion, and is good in roundness, so that the seamless bushing is uniformly contacted with the pin shaft during operation to reduce abrasion; the interference clearance between the seamless bushing and the chain plate hole is designed to be 0.06-0.08mm, so that loosening and falling off are prevented in the use process; the two sides of the seamless bushing are protruded out of the chain plate body, so that the contact area between the seamless bushing and the pin shaft can be guaranteed to the greatest extent, and the abrasion stress is further reduced.
Drawings
Fig. 1, timing chain overall structure schematic-front view.
Fig. 2, timing chain overall structure schematic-top view.
Fig. 3 is a schematic view of the main structure of the link plate of the present invention.
Fig. 4 is a schematic cross-sectional view of the link plate main body of the A-A direction of the present invention.
FIG. 5 is a schematic diagram showing the size design of the prestress groove of the link plate.
1. An inner link plate; 2. a pin shaft; 3. a guide plate; 4. a pre-stress groove; 5. a seamless bushing; 6. an outer link plate; 7. outcrop amount.
Detailed Description
The following description is of the preferred embodiments of the invention and is not intended to limit the scope of the invention, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the invention.
Example 1
The timing toothed chain with the pre-stress structure comprises a toothed chain structure formed by connecting a guide plate 3, a chain plate and a pin shaft 2, wherein the front and back edges of the chain plate are provided with pre-stress grooves 4, and seamless bushings 5 are pressed in mounting holes of the chain plate in an interference manner.
In this embodiment, the structure of the toothed chain is shown in fig. 1 and 2, and the assembly mode is the prior art, and will not be described in detail. Wherein, the front and back edges of the chain plate are provided with the pre-stress grooves 4, which can obviously improve the wear resistance of the chain plate, limit the shaping deformation and prolong the service life of the chain. By providing a seamless bushing, wear between the pin and the bushing can be significantly reduced.
Example 2
Based on example 1, this example discloses:
as shown in fig. 3-5, the section of the pre-stressing groove 4 is arc-shaped, the chain plate comprises an inner chain plate 1 and an outer chain plate 6, and the pre-stressing grooves 4 on the front and back sides of the chain plate are symmetrically arranged.
Example 3
Based on examples 1, 2, this example discloses:
as shown in fig. 3-5, the pre-stressing groove 4 is formed by opposite impact extrusion through a stamping die and simultaneously stamping the front and back sides of the reverse link plate.
Example 4
Based on examples 1, 2, this example discloses:
as shown in fig. 3-5, the structural relationship between the chain plate and the pre-stressing groove 4 is as follows: the thickness of the selected plate material of the chain plate is H, the arc included angle of the prestress groove on the surface of the chain plate is 120 degrees, the width of the notch of the prestress groove 4 is H.cos 30 degrees, the depth value of the notch is 1/4 of the thickness H of the plate material of the chain plate, and the distance between the center of the prestress groove 4 and the periphery of the chain plate is 1-1.5 times of the width value of the notch.
Example 5
Based on examples 1, 2, this example discloses:
as shown in fig. 1 and 2, the seamless bush 5 is formed by adopting seamless cold heading, and the seamless bush 5 is subjected to cryogenic treatment or metal infiltration treatment to increase the surface hardness and resist abrasion.
The interference clearance between the seamless bush 5 and the chain plate hole is 0.06-0.08mm, so that loosening and falling off are prevented in the using process.
The two sides of the seamless bushing 5 are protruded out of the chain plate body, and the outcrop amount is less than or equal to 0.02mm, so that the contact area with the pin shaft can be ensured to the greatest extent, and the abrasion stress is further reduced.
Claims (7)
1. The utility model provides a timing toothed chain with prestressing force structure, includes the toothed chain structure that forms by baffle, link joint, round pin hub connection, characterized by: the front and back edges of the chain plate are provided with prestress grooves, and seamless bushings are pressed in the mounting holes of the chain plate in an interference mode.
2. A timing toothed chain provided with a prestressing structure as claimed in claim 1, characterized in that: the section of the prestress groove is arc-shaped, the chain plate comprises an inner chain plate and an outer chain plate, and the prestress grooves on the front side and the back side of the chain plate are symmetrically arranged.
3. A timing toothed chain provided with a prestressing structure as claimed in claim 2, characterized in that: the prestress groove is formed by opposite impact extrusion through the stamping die and the front and back sides of the reverse link plate.
4. A timing toothed chain provided with a prestressing structure as claimed in claim 3, characterized in that: the structural relation between the chain plate and the prestress groove is as follows: the thickness of the selected plate material of the chain plate is H, the arc included angle of the prestress groove on the surface of the chain plate is 120 degrees, the width of the notch of the prestress groove is H.cos 30 degrees, the depth value of the notch is 1/4 of the thickness H of the plate material of the chain plate, and the distance between the center of the prestress groove and the periphery of the chain plate is 1-1.5 times of the width value of the notch.
5. A timing toothed chain provided with a prestressing structure as claimed in claim 1, characterized in that: the seamless bushing is formed by adopting a seamless cold heading method, and the seamless bushing is subjected to cryogenic treatment or metal infiltration treatment.
6. A timing toothed chain provided with a prestressing structure as claimed in claim 5, characterized in that: the interference clearance between the seamless bush and the chain plate hole is 0.06-0.08mm.
7. A timing toothed chain provided with a prestressing structure as set forth in claim 6, characterized in that: the two sides of the seamless bushing are protruded out of the chain plate body, and the outcrop amount is less than or equal to 0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311465336.0A CN117329269A (en) | 2023-11-07 | 2023-11-07 | Timing toothed chain with prestress structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311465336.0A CN117329269A (en) | 2023-11-07 | 2023-11-07 | Timing toothed chain with prestress structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117329269A true CN117329269A (en) | 2024-01-02 |
Family
ID=89293292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311465336.0A Pending CN117329269A (en) | 2023-11-07 | 2023-11-07 | Timing toothed chain with prestress structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117329269A (en) |
-
2023
- 2023-11-07 CN CN202311465336.0A patent/CN117329269A/en active Pending
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| SE01 | Entry into force of request for substantive examination | ||
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