CN112943403A - Variable valve timing electric phase modulation transmission device - Google Patents
Variable valve timing electric phase modulation transmission device Download PDFInfo
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- CN112943403A CN112943403A CN202110349592.8A CN202110349592A CN112943403A CN 112943403 A CN112943403 A CN 112943403A CN 202110349592 A CN202110349592 A CN 202110349592A CN 112943403 A CN112943403 A CN 112943403A
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- wheel
- eccentric shaft
- variable valve
- valve timing
- gear ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a variable valve timing electric phase modulation transmission device, which comprises: a camshaft; a center bolt connected with a first end of the camshaft; the eccentric shaft is rotatably sleeved on the central bolt; the supporting wheel is fixedly sleeved on the first end of the camshaft, and an inner gear ring is arranged on the supporting wheel; the planet wheel is rotatably sleeved on the eccentric shaft, a large tooth part and a small tooth part are arranged on the planet wheel, and the small tooth part is meshed with the inner gear ring of the supporting wheel; the output inner gear ring is sleeved on the planet gear and is meshed with the large gear part of the planet gear; the chain wheel is fixedly connected with the output inner gear ring; the driving mechanism can drive the eccentric shaft to rotate, not only can reduce the axial size and weight, but also can realize two-stage speed reduction of the large speed ratio 100 and 200, thereby reducing the power of the motor.
Description
Technical Field
The invention belongs to the technical field of internal combustion engine parts, and particularly relates to a variable valve timing electric phase modulation transmission device.
Background
The internal combustion engine is used as the power machine with highest thermal efficiency and most extensive application at present, the total power generated by the internal combustion engine accounts for 90 percent of the total power of power devices used all over the world, and the internal combustion engine is a main consumption channel of petroleum energy in the world. With the increase of the quantity of automobiles, the petroleum consumption of the internal combustion engine is rapidly increased, the contradiction between supply and demand of petroleum is inevitably serious day by day, and the internal combustion engine is the largest source of atmospheric environment pollution, particularly urban atmospheric environment pollution, while a large amount of energy is consumed, so that the technology of innovating the internal combustion engine is significant for saving energy and reducing environmental pollution. On the other hand, with the stricter emission regulations of countries around the world, low emission and environmental protection become the precondition for the engine to enter the market, and become the important subject of the automobile industry at present.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
in the traditional internal combustion engine, the valve opening time is fixed and unchanged, so that no matter under a large load or a small load working condition, the valve opening time is the same, energy waste is caused, and the heat efficiency is low.
The conventional hydraulically driven variable timing phase mechanism. While in operation. At low speed, phase modulation cannot be achieved. High speed phase modulation is slow and not accurate enough. In the existing electric variable timing mechanism, the weight and the size are larger, or the single-stage speed ratio is small (about 60).
Disclosure of Invention
The invention aims to solve the technical problem of providing a variable valve timing electric phase modulation transmission device which can not only reduce the axial size and weight, but also realize two-stage speed reduction and large speed ratio so as to reduce the power of a motor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a variable valve timing electric phasing transmission device is provided with:
a camshaft;
a center bolt connected with a first end of the camshaft;
the eccentric shaft is rotatably sleeved on the central bolt;
the supporting wheel is fixedly sleeved on the first end of the cam shaft, and an inner gear ring is arranged on the supporting wheel;
the planet wheel is rotatably sleeved on the eccentric shaft, a large tooth part and a small tooth part are arranged on the planet wheel, and the small tooth part is meshed with the inner gear ring of the supporting wheel;
the chain wheel is sleeved on the supporting wheel;
the output inner gear ring is sleeved on the chain wheel and meshed with a large gear part of the planet gear;
and the driving mechanism can drive the eccentric shaft to rotate.
The driving mechanism comprises a motor, a motor shifting block and a spacer bush, the spacer bush is fixedly connected with the eccentric shaft, the motor shifting block is connected with a rotating shaft of the motor, and the motor shifting block can be matched with the spacer bush.
The eccentric shaft is rotatably arranged on the central bolt through a bearing; the planet wheel is rotatably mounted on the eccentric shaft through a bearing.
The eccentric shaft is rotatably mounted on the central bolt through a needle bearing; the planet wheel is rotatably mounted on the eccentric shaft through an outer ball bearing.
An elastic sheet is arranged between the eccentric shaft and the outer ball bearing; the spacer bush is a plastic spacer bush.
The chain wheel is provided with a cavity, and the supporting wheel is arranged in the cavity of the chain wheel.
The output inner gear ring is matched with the chain wheel through a step surface, and the output inner gear ring is fixedly connected with the chain wheel through a bolt.
The bottom surface and the outer peripheral surface of the supporting wheel are matched with the bottom surface and the inner peripheral surface of the chain wheel; and two sides of the large tooth part of the planet wheel are in clearance fit with the supporting wheel and the output inner gear ring.
The central bolt is in threaded connection with the camshaft.
One of the above technical solutions has the following advantages or beneficial effects, not only can the axial size and weight be reduced, but also the two-stage deceleration high speed ratio 100 and 200 can be realized, thereby reducing the motor power.
Drawings
FIG. 1 is a schematic diagram of a variable valve timing electro-dynamic phasing transmission provided in an embodiment of the invention;
FIG. 2 is a drive schematic of the variable valve timing electro-phasing transmission of FIG. 1;
FIG. 3 is a schematic diagram of the reception of the variable valve timing electro-phasing transmission of FIG. 1;
FIG. 4 is a schematic diagram of the plastic spacer of the variable valve timing electro-dynamic phasing transmission of FIG. 1;
FIG. 5 is a schematic view of a combination positioning arrangement of the variable valve timing electro-phasing transmission of FIG. 1;
FIG. 6 is a schematic diagram of the variable valve timing electro-phasing transmission of FIG. 1;
FIG. 7 is a cross-sectional view A-A, B-B of FIG. 6;
FIG. 8 is an exploded schematic view of the variable valve timing electro-phasing transmission of FIG. 1;
the labels in the above figures are: 1. supporting wheel, 2, chain wheel, 3, output inner gear ring, 4, central bolt, 5, plastic spacer, 6, needle bearing, 7, eccentric shaft, 8, planet wheel, 9, outer ball bearing, 10, elastic sheet, 01, camshaft, 02, motor shifting block, 03 and motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1-8, a variable valve timing electro-dynamic phasing transmission, has:
a camshaft 01;
a center bolt 4 connected to a first end of the camshaft 01;
the eccentric shaft 7 is rotatably sleeved on the central bolt 4;
the supporting wheel 1 is fixedly sleeved on the first end of the camshaft 01, and an inner gear ring is arranged on the supporting wheel 1;
the planet wheel 8 is rotatably sleeved on the eccentric shaft 7, a large tooth part 801 and a small tooth part 802 are arranged on the planet wheel 8, and the small tooth part 802 is meshed with the inner gear ring of the supporting wheel 1;
the chain wheel is sleeved on the supporting wheel;
the output inner gear ring is sleeved on the chain wheel and is meshed with the large gear part of the planet gear;
and a driving mechanism capable of driving the eccentric shaft 7 to rotate.
The driving mechanism comprises a motor 03, a motor shifting block 02 and a spacer bush, the spacer bush is fixedly connected with the eccentric shaft, the motor shifting block 02 is connected with a rotating shaft of the motor 03, and the motor shifting block 02 can be matched with the spacer bush.
The eccentric shaft 7 is rotatably installed on the central bolt 4 through the needle bearing 6, the elastic sheet 10 is arranged between the eccentric shaft 7 and the outer ball bearing 9, the radial space is greatly released due to the adoption of the needle bearing 6, the elastic sheet 10 is allowed to be arranged between the eccentric shaft 7 and the outer ball bearing 9, the gear can be meshed without gaps through the elastic sheet 10, noise is reduced, and abrasion is reduced. The planet wheel 8 is rotatably mounted on the eccentric shaft by means of an outer ball bearing 9. Because two bearings are axially overlapped, the axial length is shortened compared with the conventional design, and the bearing is supported in a shape like a Chinese character 'shan', so that the vertical stress is more reasonable, as shown in figures 2 and 3. The supporting form is similar to a Chinese character 'shan', the supporting wheel 1 and the central bolt 4 support other parts together, and the stress is more reasonable.
The spacer bush is a plastic spacer bush 5. A plastic spacer 5 is arranged between the motor shifting block 02 and the eccentric shaft 7, so that direct contact between metal and metal is avoided, and friction noise is reduced, as shown in fig. 4.
An elastic sheet 10 is arranged between the eccentric shaft 7 and the outer ball bearing 9, and the elastic sheet 10 can enable the gear to be meshed without a gap, so that noise is reduced, and abrasion is reduced.
The chain wheel 2 is provided with a cavity, and the supporting wheel 1 is arranged in the cavity of the chain wheel 2.
The output inner gear ring 3 is matched with the chain wheel 2 through a step surface, and the output inner gear ring 3 is tightly connected with the chain wheel 2 through a bolt.
The central bolt is in threaded connection with the camshaft. Besides serving as a screwing link between the speed reducer and the camshaft, the center bolt also serves as a supporting shaft of the bearing gear, and parts are reduced (as shown in figure 1).
And (3) description in combination with positioning: as shown in fig. 5, the bottom surface and the outer peripheral surface of the support wheel 1 are fitted with the bottom surface and the inner peripheral surface of the sprocket 2; two sides of a large tooth part 801 of the planet wheel 8 are in clearance fit with the supporting wheel 1 and the output inner gear ring 3. The support wheel 1 is clamped on the camshaft 01 by tightening the central screw 4. The output inner gear ring 3 and the chain wheel 2 are ensured to be concentric through a d matching surface and are connected in a bolt fastening mode. The supporting wheel 1 supports the chain wheel 2 through two matching surfaces of b and c, and simultaneously supports the output inner gear ring 3. The planet wheel 8 realizes axial small clearance fit through two fitting surfaces of e and f, and the free rotation of the planet wheel 8 is ensured and the planet wheel cannot incline.
The planet wheel 8 comprises a large tooth part 801 and a small tooth part 802, and the large tooth part 801 is meshed with the output inner gear ring 3 so as to transmit the power of the chain wheel 2 to the planet wheel 8; the other side small tooth portion 802 of the planetary gear 8 meshes with the support wheel 1, thereby transmitting power to the camshaft 01.
The center bolt 4 is a special bolt having a bearing raceway surface and a lubricating oil passage thereon.
The specific transmission paths are as follows:
FIG. 1: the motor shifting block 02 shifts the plastic spacer 5 to drive the eccentric shaft 7;
FIGS. 6 and 7: the eccentric shaft 7 is stirred by the motor shifting block 02, the eccentric shaft rotates under the support of the central bolt 4, the outer diameter and the inner diameter of the eccentric shaft 7 are eccentrically arranged, when the eccentric shaft rotates for one circle, the bearing 9 and the planet wheel 8 which are arranged on the outer side of the eccentric shaft deflect once, the large tooth 801 of the planet wheel meshes for one circle along the inner teeth of the output inner gear ring 3, and meanwhile, the small tooth 802 of the planet wheel also meshes for one circle along the inner teeth of the support wheel 1. Because the number of teeth of the large gear 801 and the small gear 802 of the planet gear is different, the rotation angles of the supporting wheel 1 and the output inner gear ring 3 which are simultaneously meshed with the planet gear 8 are different, and finally, the phase change is realized.
After the structure is adopted, the axial size and the weight can be reduced, and the two-stage speed reduction large speed ratio 100-200 can be realized, so that the power of the motor is reduced.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (9)
1. A variable valve timing electric phasing transmission device is characterized by comprising:
a camshaft;
a center bolt connected with a first end of the camshaft;
the eccentric shaft is rotatably sleeved on the central bolt;
the supporting wheel is fixedly sleeved on the first end of the cam shaft, and an inner gear ring is arranged on the supporting wheel;
the planet wheel is rotatably sleeved on the eccentric shaft, a large tooth part and a small tooth part are arranged on the planet wheel, and the small tooth part is meshed with the inner gear ring of the supporting wheel;
the chain wheel is sleeved on the supporting wheel and is fixedly connected with the output inner gear ring;
the output inner gear ring is sleeved on the chain wheel and meshed with a large gear part of the planet gear;
and the driving mechanism can drive the eccentric shaft to rotate.
2. The variable valve timing electro-dynamic phasing transmission of claim 1, wherein the driving mechanism comprises a motor, a motor dial and a spacer, the spacer is fixedly connected with the eccentric shaft, the motor dial is connected with a rotating shaft of the motor, and the motor dial can be adapted with the spacer.
3. The variable valve timing electro-phasing transmission of claim 2, wherein the eccentric shaft is rotatably mounted on the center bolt by a bearing; the planet wheel is rotatably mounted on the eccentric shaft through a bearing.
4. The variable valve timing electro-phasing transmission of claim 3, wherein the eccentric shaft is rotatably mounted on the support sleeve by needle bearings; the planet wheel is rotatably mounted on the eccentric shaft through an outer ball bearing.
5. The variable valve timing electric phasing transmission device according to claim 4, wherein a spring plate is provided between the eccentric shaft and the outer ball bearing; the spacer bush is a plastic spacer bush.
6. The variable valve timing electro-dynamic phasing transmission of claim 5, wherein a cavity is provided in the sprocket and the support wheel is mounted in the cavity of the sprocket.
7. The variable valve timing electric phasing transmission device according to claim 6, wherein the output ring gear and the sprocket are engaged by a stepped surface, and the output ring gear and the sprocket are fastened by a bolt.
8. The variable valve timing electro-phasing transmission device according to claim 7, wherein a bottom surface and an outer peripheral surface of the support wheel are fitted with a bottom surface and an inner peripheral surface of the sprocket; and two sides of the large tooth part of the planet wheel are in clearance fit with the supporting wheel and the output inner gear ring.
9. The variable valve timing electro-phasing transmission of claim 8, wherein the center bolt is threadedly coupled to a camshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349592.8A CN112943403A (en) | 2021-03-31 | 2021-03-31 | Variable valve timing electric phase modulation transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349592.8A CN112943403A (en) | 2021-03-31 | 2021-03-31 | Variable valve timing electric phase modulation transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112943403A true CN112943403A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110349592.8A Pending CN112943403A (en) | 2021-03-31 | 2021-03-31 | Variable valve timing electric phase modulation transmission device |
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|---|---|
| CN (1) | CN112943403A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050199201A1 (en) * | 2002-10-17 | 2005-09-15 | Ina-Schaeffler Kg | Electrically driven camshaft adjuster |
| DE102015008196A1 (en) * | 2015-06-26 | 2016-07-14 | Iwis Motorsysteme Gmbh & Co. Kg | Camshaft adjuster with two-stage eccentric gear |
| CN108952873A (en) * | 2018-08-31 | 2018-12-07 | 绵阳富临精工机械股份有限公司 | A kind of rear-mounted VVT phaser |
| CN109653828A (en) * | 2017-10-10 | 2019-04-19 | 博格华纳公司 | The eccentric gear that bearing span reduces |
| CN110295964A (en) * | 2019-05-09 | 2019-10-01 | 湖南大兹动力科技有限公司 | A kind of engine valve control device that motor is adjusted |
| US20200040778A1 (en) * | 2018-07-31 | 2020-02-06 | Denso Corporation | Valve timing adjusting device |
-
2021
- 2021-03-31 CN CN202110349592.8A patent/CN112943403A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050199201A1 (en) * | 2002-10-17 | 2005-09-15 | Ina-Schaeffler Kg | Electrically driven camshaft adjuster |
| DE102015008196A1 (en) * | 2015-06-26 | 2016-07-14 | Iwis Motorsysteme Gmbh & Co. Kg | Camshaft adjuster with two-stage eccentric gear |
| CN109653828A (en) * | 2017-10-10 | 2019-04-19 | 博格华纳公司 | The eccentric gear that bearing span reduces |
| US20200040778A1 (en) * | 2018-07-31 | 2020-02-06 | Denso Corporation | Valve timing adjusting device |
| CN108952873A (en) * | 2018-08-31 | 2018-12-07 | 绵阳富临精工机械股份有限公司 | A kind of rear-mounted VVT phaser |
| CN110295964A (en) * | 2019-05-09 | 2019-10-01 | 湖南大兹动力科技有限公司 | A kind of engine valve control device that motor is adjusted |
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