CN214035818U - VVT rubber-coated chain wheel of automobile engine - Google Patents
VVT rubber-coated chain wheel of automobile engine Download PDFInfo
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- CN214035818U CN214035818U CN202022774201.0U CN202022774201U CN214035818U CN 214035818 U CN214035818 U CN 214035818U CN 202022774201 U CN202022774201 U CN 202022774201U CN 214035818 U CN214035818 U CN 214035818U
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- 238000004663 powder metallurgy Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 238000010073 coating (rubber) Methods 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 11
- 238000005245 sintering Methods 0.000 description 8
- 238000000227 grinding Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an automobile engine VVT rubber coating sprocket. The method comprises the following steps: a stator body, a gear portion and an annular step; the stator body and the gear part are of an integrated structure, and the annular step is arranged between the stator body and the gear part; a stator cavity matched with the rotor is formed in the stator body; a plurality of convex ribs are arranged in the stator cavity, and threaded holes are formed in the convex ribs; the convex rib is provided with a groove for preventing the rotor from rotating and clamping stagnation at the joint of the stator cavity. Grooves are formed in two sides of the convex rib in the stator cavity and used for containing oil impurities or particles attached to the rotor in the process of oil-carrying rotation in the stator cavity, so that the VVT phase regulator is prevented from being out of work due to rotor rotation clamping stagnation; the rubber-coated gear ring is arranged between the gear part and the annular step, so that the contact vibration between the chain and the gear part is reduced, the noise generated by meshing the chain and the gear part is reduced, and the noise NVH of the engine is improved; the utility model discloses compact structure, preventable phase regulator card pause have improved production efficiency, and the part is with low costs.
Description
Technical Field
The utility model relates to an automobile parts technical field, concretely relates to automobile engine VVT rubber coating sprocket.
Background
The variable Valve Timing system VVT (variable Valve Timing system) changes the Valve opening and closing time along with the change of the engine rotating speed by adjusting the rotating angle of a camshaft, namely, the opening and closing time of an engine Valve is adjusted by the phase change of the camshaft, so that the combustion efficiency is improved, and the effects of energy conservation and emission reduction are realized. The VVT camshaft phase adjuster mainly includes a stator, a rotor rotatably located in the stator, a gear portion, and the like. The stator and the gear part are usually assembled by bolt connection, which has low assembly efficiency, low system precision and high part cost. In the VVT system, the gear portion is connected to the timing chain, which generates vibration during transmission, resulting in loud noise, and greatly affecting the NVH of the automobile.
In the reciprocating rotation process of the rotor with oil in the stator, impurity particles in the oil easily fill a gap between the stator and the rotor, and the stator and the rotor are blocked in rotation to cause the blocking failure of the VVT phase regulator.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automobile engine VVT rubber coating sprocket, its compact structure, chain noise are little, prevention phase regulator card pause, convenient manufacturing, with low costs.
The utility model discloses a realize through following technical scheme:
the automobile engine VVT rubber-coated chain wheel is characterized by comprising a stator body, a gear part and an annular step; the stator body and the gear part are of an integrated structure, gear teeth are arranged on the outer edge of the gear part, and the annular step is arranged between the stator body and the gear part; a stator cavity matched with the rotor is formed in the stator body; a plurality of convex ribs are arranged in the stator cavity, and threaded holes are formed in the convex ribs; and a groove for preventing the rotor from being blocked by rotation is arranged at the joint of the convex rib and the stator cavity. Particularly, the stator body and the gear part of the automobile engine VVT rubber-coated gear part stator of the utility model adopt an integrated structure, and are in bolt connection with respect to the stator body and the gear part which are separated, so that the assembly efficiency and the system precision are improved, and the part cost is reduced; adopt the structure of stator body and gear portion integral type simultaneously, its assembly efficiency is high and system's precision is high, when improving VVT system performance, has improved production efficiency, is fit for mass production. Specifically, the utility model discloses still set up the slot in the stator die cavity that is used for holding the rotor, the slot setting is in the both sides and the stator die cavity joint angle department of protruding muscle, and the slot can be used for holding rotor oily impurity or granule subsidiary in the rotatory in-process of stator die cavity area, prevents that the rotatory jamming of rotor from sending VVT phase regulator to become invalid.
Further, the stator body and the gear portion are of an integral structure sintered through powder metallurgy. The sintered integral piece of the powder metallurgy stator body and the gear part is in bolted connection with the split piece of the stator body and the gear part, so that the assembly efficiency and the system precision are improved, and the part cost is reduced.
Furthermore, the tooth part of the gear part adopts high-frequency quenching heat treatment, the depth of a tooth root hardening layer is 0.5-1.5mm, and the tooth hardness HV is 0.1500-800; and the hardness HRB 68-89 of the non-high-frequency region except the gear part tooth part.
Further, the inner diameter of the stator cavity is 75-85mm, and the roughness meets Rz6.3; the height of the gear part tooth part is 15-20mm, and the roughness meets Rz6.3.
Furthermore, 4 convex ribs are uniformly arranged in the stator cavity.
Further, a layer of rubber-coated gear ring used for reducing vibration between the chain and the gear part is arranged between the gear part and the annular step. The contact vibration between the chain and the gear part is reduced, so that the noise generated by meshing the chain and the gear part is reduced, and the NVH performance of the chain transmission system is improved.
Furthermore, the rubber-coated gear ring is made of rubber, and the Shore hardness of the rubber is 60-65 degrees.
Furthermore, a timing mark is arranged on the stator body. The timing indicia facilitate positioning of the VVT encapsulated gear portion stator during assembly.
The utility model discloses obtain beneficial effect:
(1) the utility model discloses an automobile engine VVT rubber coating sprocket, compact structure, VVT system noise is little, can prevent phase regulator card pause, when improving VVT system performance, has reduced the part cost, is fit for mass production; just the utility model discloses an automobile engine VVT rubber coating gear portion its gear portion of stator and stator one shot forming have reduced the assembly process in later stage, have improved production efficiency to the precision is high.
(2) The grooves are arranged at the two sides of the convex rib in the stator cavity, and the grooves can be used for accommodating oil impurities or particles attached in the process that the rotor rotates with oil in the stator cavity, so that the VVT phase adjuster is prevented from losing efficacy due to the rotation clamping stagnation of the rotor; the utility model discloses a still set up the rubber coating ring gear between gear portion and annular step, reduced the contact vibration between chain and the gear portion to this reduces the noise that chain and gear portion meshing produced, has improved chain drive system's NVH performance.
(3) The utility model discloses an automobile engine VVT rubber coating sprocket adopts the integral structure that powder metallurgy sintering formed with stator body and gear portion, and it divides body part bolted connection for stator body and gear portion, has improved assembly efficiency and system accuracy, and has reduced the part cost, has improved production efficiency, is fit for mass production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a front view of the stator of the encapsulated gear part of the VVT of the automobile engine of the present invention.
In the figure: 1 stator body, 2 gear parts, 3 stator cavities, 4 convex ribs, 5 screw holes, 6 grooves, 7 annular steps, 8 rubber-coated gear rings and 9 timing marks.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
A VVT rubber-coated chain wheel of an automobile engine comprises a stator body 1, a gear part 2 and an annular step 7; the stator body 1 and the gear part 2 are of an integral structure sintered by powder metallurgy, gear teeth are arranged on the outer edge of the gear part 2, and the annular step 7 is arranged between the stator body 1 and the gear part 2; a stator cavity 3 matched with the rotor is formed in the stator body 1; a plurality of convex ribs 4 are arranged in the stator cavity 3, and threaded holes 5 are formed in the convex ribs 4 in a penetrating mode; the convex rib 4 and the connecting part of the stator cavity 3 are provided with a groove 6 for preventing the rotor from being blocked in rotation, and the groove can be used for accommodating oil impurities or particles attached to the rotor in the process of oil-carrying rotation in the stator cavity 3, so that the VVT phase adjuster is prevented from being out of work due to the rotor rotation blocking.
Preferably, in embodiment 1, 4 ribs 4 are uniformly arranged in the stator cavity 3; preferably, a layer of rubber-coated gear ring 8 for reducing vibration between the chain and the gear part 2 is further arranged between the gear part 2 and the annular step 7 (the rubber-coated gear ring 8 is made of rubber, and the shore hardness of the rubber is 60 °), and the rubber-coated gear ring 8 reduces contact vibration between the chain and the gear part, so that noise generated by meshing of the chain and the gear part is reduced, and the NVH performance of the chain transmission system is improved; the fitting end face of the gear portion 2 is preferably provided with a timing mark 9; the tooth part of the gear part 2 adopts high-frequency quenching heat treatment, the depth of a tooth root hardening layer is 1.0mm, and the tooth part hardness is HV 0.1600; hardness HRB 75 of non-high frequency region except the gear portion 2; the inner diameter of the stator cavity 3 is 79.05mm, the tolerance is 0.09mm, and the roughness after shaping meets Rz6.3; the height of the tooth part of the gear part 2 is 16mm, the tolerance of the double-sided grinding is 0.015mm, and the roughness of the double-sided grinding meets Rz6.3.
Example 2
A VVT rubber-coated chain wheel of an automobile engine comprises a stator body 1, a gear part 2 and an annular step 7; the stator body 1 and the gear part 2 are of an integral structure sintered by powder metallurgy, gear teeth are arranged on the outer edge of the gear part 2, and the annular step 7 is arranged between the stator body 1 and the gear part 2; a stator cavity 3 matched with the rotor is formed in the stator body 1; a plurality of convex ribs 4 are arranged in the stator cavity 3, and threaded holes 5 are formed in the convex ribs 4 in a penetrating mode; the convex rib 4 and the connecting part of the stator cavity 3 are provided with a groove 6 for preventing the rotor from being blocked in rotation, and the groove can be used for accommodating oil impurities or particles attached to the rotor in the process of oil-carrying rotation in the stator cavity 3, so that the VVT phase adjuster is prevented from being out of work due to the rotor rotation blocking.
Preferably, in embodiment 1, 4 ribs 4 are uniformly arranged in the stator cavity 3; preferably, a layer of rubber-coated gear ring 8 for reducing vibration between the chain and the gear part 2 is further arranged between the gear part 2 and the annular step 7 (the rubber-coated gear ring 8 is made of rubber, and the shore hardness of the rubber is 65 °), and the rubber-coated gear ring 8 reduces contact vibration between the chain and the gear part, so that noise generated by meshing of the chain and the gear part is reduced, and noise NVH of the engine is improved; preferably, the stator body 1 is further provided with a timing mark 9; the tooth part of the gear part 2 adopts high-frequency quenching heat treatment, the depth of a tooth root hardening layer is 1.5mm, and the tooth hardness HV is 0.1800; hardness HRB 85 of non-high frequency region except the tooth part of the gear part 2; the inner diameter of the stator cavity 3 is 85mm, the tolerance is 0.09mm, and the roughness after shaping meets Rz6.3; the height of the tooth part of the gear part 2 is 16mm, the tolerance of the double-sided grinding is 0.015mm, and the roughness of the double-sided grinding meets Rz6.3.
In the actual production process, the manufacturing process of the powder metallurgy of the automobile engine VVT rubber-coated sprocket comprises the following steps: mixing → forming → sintering → surface densification of shot blasting → shaping → high frequency, tempering of gear tooth part → cleaning, degreasing → encapsulation → machining inner diameter, double-side grinding → cleaning, oil immersion and packaging.
(1) Mixing materials: uniformly mixing all the raw materials according to the chemical components of the VVT rubber-coated chain wheel of the automobile engine;
(2) forming: molding the mixed powder at room temperature, wherein the molding pressure is 700MPa, and the molding density is 6.85g/cm3；
(3) And (3) sintering: sintering in a mesh belt furnace after forming, wherein the sintering temperature is 1110 ℃, the sintering time is 45 minutes, and the protective atmosphere is nitrogen-hydrogen mixed atmosphere during sintering;
(4) shot blasting surface densification: after sintering, spraying 50-60 meshes of sand grains through a shot blasting machine to obtain a compact layer on the part;
(5) shaping: after the gear part subjected to surface densification treatment is soaked in lubricating oil, shaping is carried out on a CNC press of 150 and 200 tons so as to correct the size;
(6) high-frequency tempering of gear tooth part: after shaping, carrying out high-frequency quenching heat treatment on the gear part tooth part, wherein the depth of a tooth root hardening layer is 0.5-1.5mm, and tempering for 1 hour at 220 ℃ to obtain the hardness Hv0.1500-800 of the gear part;
(7) cleaning and deoiling: ultrasonically cleaning the gear part by using a water-based cleaning solution to remove impurities such as residual grease on the surface of the gear part; in the production process, the oil removing process is focused, so that the oil leaked from the surface or the pores of the gear part is prevented from influencing the bonding between the powder metallurgy part and the rubber, and the bonding strength between the rubber-coated gear ring and the gear part is finally ensured;
(8) encapsulating: loading the gear part into a die, and coating the rubber with the composite requirement at the encapsulation part;
(9) machining and turning the inner diameter and double-side grinding: double-end-face grinding and finish turning of a central pressure shaft hole are carried out according to the drawing size requirement of the gear part, the shaping precision is guaranteed, and the drawing requirement is met;
(10) washing, immersing in oil, and packaging: and (4) cleaning and oil immersion after machining to obtain the automobile engine VVT rubber-coated chain wheel, and then inspecting, packaging and warehousing.
The above is that the preferred embodiment of the present invention is only used for explaining the present invention, and is not used for limiting the present invention. All obvious changes or variations led by the technical proposal of the utility model are still within the protection scope of the utility model.
Claims (8)
1. The rubber-coated chain wheel of the VVT of the automobile engine is characterized by comprising a stator body (1), a gear part (2) and an annular step (7); the stator body (1) and the gear part (2) are of an integrated structure, gear teeth are arranged on the outer edge of the gear part, and the annular step (7) is arranged between the stator body (1) and the gear part (2); a stator cavity (3) matched with the rotor is formed in the stator body (1); a plurality of convex ribs (4) are arranged in the stator cavity (3), and threaded holes (5) are formed in the convex ribs (4) in a penetrating manner; and a groove (6) for preventing the rotor from rotating and clamping stagnation is arranged at the joint of the convex rib (4) and the stator cavity (3).
2. The automotive engine VVT encapsulated sprocket as claimed in claim 1, wherein said stator body (1) and said gear portion (2) are of unitary construction sintered by powder metallurgy.
3. The automotive engine VVT encapsulated sprocket according to claim 2, wherein the teeth of the gear part (2) are subjected to high frequency quenching heat treatment, the depth of a tooth root hardening layer is 0.5-1.5mm, and the tooth hardness HV is 0.1500-800; the hardness HRB 68-89 of the non-high frequency region except the tooth part of the gear part (2).
4. The automotive engine VVT encapsulated sprocket wheel according to claim 3, wherein the inner diameter of the stator cavity (3) is 75-85mm, and the roughness meets Rz6.3; the height of the tooth part of the gear part (2) is 15-20mm, and the roughness meets Rz6.3.
5. The automotive engine VVT encapsulated sprocket wheel according to claim 1, wherein 4 ribs (4) are uniformly arranged in the stator cavity (3).
6. The automotive engine VVT encapsulated sprocket according to claim 1, characterized in that between the gear part (2) and the annular step (7) is further provided a layer of encapsulated ring gear (8) for reducing vibrations between the chain and the gear part (2).
7. The automotive engine VVT encapsulated sprocket wheel as claimed in claim 6, wherein the encapsulated ring gear (8) is made of rubber, and the Shore hardness of the rubber is 60-65 °.
8. The automotive engine VVT encapsulated sprocket wheel according to claim 1, wherein the stator body (1) is provided with a timing mark (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022774201.0U CN214035818U (en) | 2020-11-26 | 2020-11-26 | VVT rubber-coated chain wheel of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022774201.0U CN214035818U (en) | 2020-11-26 | 2020-11-26 | VVT rubber-coated chain wheel of automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214035818U true CN214035818U (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022774201.0U Active CN214035818U (en) | 2020-11-26 | 2020-11-26 | VVT rubber-coated chain wheel of automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214035818U (en) |
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- 2020-11-26 CN CN202022774201.0U patent/CN214035818U/en active Active
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