CN104895637A - Continuously variable valve timing mechanism adopting conical gears - Google Patents
Continuously variable valve timing mechanism adopting conical gears Download PDFInfo
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- CN104895637A CN104895637A CN201510392568.7A CN201510392568A CN104895637A CN 104895637 A CN104895637 A CN 104895637A CN 201510392568 A CN201510392568 A CN 201510392568A CN 104895637 A CN104895637 A CN 104895637A
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Abstract
The invention discloses a continuously variable valve timing mechanism adopting conical gears. A cam shaft gear, an intermediate gear and a transmission gear are conical gears; the transmission gear and the cam shaft gear are engaged with the intermediate gear, and are oppositely arranged; the intermediate gear is fixedly connected with an intermediate gear bearing; the intermediate gear bearing is arranged on an intermediate gear shaft in a sleeving mode; the upper end of the intermediate gear shaft is fixedly connected with a control bearing; the control bearing is arranged on a cam shaft in the sleeving mode; the transmission gear is fixedly connected with a transmission gear bearing; the transmission gear bearing is arranged on the cam shaft in the sleeving mode; the cam shaft gear is arranged on the cam shaft by a cam shaft key; a chain wheel is arranged on the transmission gear in the sleeving mode, and is connected with the transmission gear by a chain wheel key; the control device comprises a motor and a one-way drive device; and the intermediate gear shaft is connected with the motor by the one-way drive device. The continuously variable valve timing mechanism adopting conical gears is stable in phase change, simple in structure, improved in transmission precision and transmission efficiency and small in noise.
Description
Technical field
The present invention relates to field of internal combustion engine, particularly the valve timing control mechanism of the air inlet system and exhaust system of internal-combustion engine.
Background technique
High pollution, the energy lack overall background under, energy-conservation with reduction of discharging become new social concerns focus; Automobile is as one of energy consumption and air-polluting leading role, and energy-conservation just the seeming with reduction of discharging of internal-combustion engine is even more important; In recent years, Variable Valve Time (VVT) technology as one putative contribute to combustion engine energy-saving reduce discharging technology and favored; And one of continuous variable valve technology optimal selection that yes wherein, this quasi-valve variable timing mechanism can realize the adjustment to valve timing within the scope of the full working scope of motor, reaches optimal valve timing control scheme.
Research for CVTC is a lot, but there are some problems in existing CVTC, such as popularly at present change this scheme in phase angle between camshaft and driving gear by hydraulic coupling, due to the problem such as pulsation and compressibility of hydraulic pressure, it is not very stable that phase place is changed, also relate to the problems such as sealing, mechanism for implementing difficulty is larger simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of cone gear continuous variable timing mechanism of phase place vary stable.
The technical solution used in the present invention is: a kind of cone gear continuous variable timing mechanism, comprises intermediate gear, intermediate gear shaft, camshaft, camshaft gear wheel, driving gear, sprocket wheel and control gear; Described camshaft gear wheel, intermediate gear and driving gear are cone gear; Described driving gear and camshaft gear wheel all engage with intermediate gear, and are oppositely arranged; Described intermediate gear is fixedly connected with intermediate gear bearing, and intermediate gear bearing housing is loaded on intermediate gear shaft; Described intermediate gear shaft upper end is fixedly connected with control bearing, and Control Shaft bearing sleeve is loaded on camshaft; Described driving gear is fixedly connected with driving gear bearing, and driving gear bearing housing is loaded on camshaft; Described camshaft gear wheel is arranged on camshaft by cam axle key; Described sprocket wheel is set on driving gear, is connected with driving gear by steering sprocket key; Described control gear comprises motor and one-direction driving apparatus, and intermediate gear shaft is connected with motor by one-direction driving apparatus.
As preferably, be also fixedly connected with Control Shaft bearing between described intermediate gear shaft upper end and control bearing, Control Shaft bearing is set in and controls on bearing.
As preferably, described driving gear is identical with the camshaft gear wheel number of teeth.
As preferably, described one-direction driving apparatus comprises push rod and swing arm; One end and the intermediate gear shaft of described push rod are hinged, the other end and swing arm hinged; Swing arm is connected with motor by transmission shaft.
As preferably, between described swing arm and transmission shaft, be also provided with worm gear and worm screw; The described worm gear opposite end hinged with swing arm and push rod is fixedly connected with; Worm gear center is arranged on engine body by fulcrum is rotating; Worm and wheel engages, and is connected with motor by transmission shaft.
As preferably, the central axis of the central axis of described intermediate gear shaft, push rod central axis and swing arm is in same plane, and the central axis of this plane orthogonal in camshaft and the central axis of worm gear.
As preferably, one end of described push rod by push rod hinge and intermediate gear shaft hinged, the other end by swing arm hinge and swing arm hinged.
The invention has the beneficial effects as follows:
(1) the present invention adopts cone gear to realize transmission and phase change, and phase change is accurate, control mechanism is simple and save space;
(2) the present invention adopts Bevel Gear Drive, transmission accuracy and transmission efficiency high, noise is little;
(3) adopt worm gear and worm structure in the present invention, there is auto-lock function, need not addition thereto change to keep timing after timing has adjusted.
Accompanying drawing explanation
Fig. 1 is rigging position relation schematic diagram of the present invention.
Fig. 2 is control gear structural representation of the present invention.
In figure: 1-intermediate gear, 2-intermediate gear shaft, 3-intermediate gear bearing, 4-camshaft, 5-cam axle key, 6-camshaft gear wheel, 7-controls bearing, 8-Control Shaft bearing, 9-driving gear bearing, 10-driving gear, 11-sprocket wheel, 12-steering sprocket key, 13-engine body, 14-push rod hinge, 15-push rod, 16-swing arm hinge, 17-swing arm, 18-worm gear, 19-worm screw, 20-transmission shaft, 21-motor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1 and Figure 2, cone gear CVTC, comprises intermediate gear 1, intermediate gear shaft 2, camshaft 4, camshaft gear wheel 6, driving gear 10, sprocket wheel 11 and control gear; Described camshaft gear wheel 6, intermediate gear 1 and driving gear 10 is cone gear; Described driving gear 10 and camshaft gear wheel 6 all engage with intermediate gear 1, and are oppositely arranged; Described intermediate gear 1 is fixedly connected with intermediate gear bearing 3, and intermediate gear bearing 3 is set on intermediate gear shaft 2; Described intermediate gear shaft 2 upper end is fixedly connected with control bearing 7, controls bearing 7 and is set on camshaft 4; Described driving gear 10 is fixedly connected with driving gear bearing 9, and driving gear bearing 9 is set on camshaft 4; Described camshaft gear wheel 6 is arranged on camshaft 4 by cam axle key 5; Described sprocket wheel 11 is set on driving gear 10, is connected with driving gear 10 by steering sprocket key 12; Described control gear comprises motor 21 and one-direction driving apparatus, and intermediate gear shaft 2 is connected with motor 21 by one-direction driving apparatus; Camshaft gear wheel 6, intermediate gear 1 and driving gear 10 adopt cone gear, and transmission accuracy is higher, transmission efficiency is higher, and phase change is more stable.
Also be fixedly connected with Control Shaft bearing 8 between described intermediate gear shaft 2 upper end and control bearing 7, Control Shaft bearing 8 is set in and controls on bearing 7; The axis of intermediate gear shaft 2 and camshaft 4 is in same plane, and intermediate gear shaft 2 is perpendicular to camshaft 4, and intermediate gear shaft 2 is connected with camshaft 4 whole mechanism can be made as a whole, and transmission process is stablized more, precision is higher.
Described driving gear 10 is identical with camshaft gear wheel 6 number of teeth; Described one-direction driving apparatus comprises push rod 15 and swing arm 17; One end and the intermediate gear shaft 2 of described push rod 15 are hinged, the other end and swing arm 17 hinged; Swing arm 17 is connected with motor 21 by transmission shaft 20; Worm gear 18 and worm screw 19 is also provided with between described swing arm 17 and transmission shaft 20; Described worm gear 18 opposite end hinged with push rod 15 with swing arm 17 is fixedly connected with; Worm screw 19 engages with worm gear 18, and is connected with motor 21 by transmission shaft 20; Worm gear 18 center is arranged on engine body 13 by fulcrum is rotating; Adopt the structure of worm gear 18 and worm screw 19, there is auto-lock function, after timing has adjusted without the need to addition thereto to keep timing constant, structure is more stable.
The central axis of the central axis of described intermediate gear shaft 2, push rod 15 central axis and swing arm 17 is in same plane, and the central axis of this plane orthogonal in camshaft 4 and the central axis of worm gear 18; It is more stable and accurate that this structural design can make timing adjust.
One end of described push rod 15 is hinged by push rod hinge 14 and intermediate gear shaft 2, and the other end is hinged by swing arm hinge 16 and swing arm 17; This structural design makes between push rod 15 and intermediate gear shaft 2, and the connection between push rod 15 and swing arm 17 is more stable, and phase place transmission is more accurate.
During use, sprocket wheel 11 is connected with the bent axle of motor, and the Sports band movable sprocket 11 of bent axle moves, and because sprocket wheel 11 is connected with driving gear 10 by steering sprocket key 12, and sprocket wheel 11 and driving gear 10 are coaxially, so sprocket wheel 11 and the synchronized rotation of driving gear 10; Because driving gear 10 engages with intermediate gear 1, the rotation of driving gear 10 drives intermediate gear 1 to rotate; Because intermediate gear 1 and camshaft gear wheel 6 engage each other, the rotating band moving cam shaftgear 6 of intermediate gear 1 rotates; Because driving gear 10 number of teeth is identical with camshaft gear wheel 6 number of teeth, therefore driving gear 10 is identical with camshaft gear wheel 6 wheel speed; Because camshaft gear wheel 6, intermediate gear 1 and driving gear 10 are cone gear, the motion of driving gear 10 passes to camshaft gear wheel 6 rear to change through intermediate gear 1, and the sense of rotation of camshaft gear wheel 6 is contrary with driving gear 10; Camshaft gear wheel 6 is arranged on camshaft 4 by cam axle key 5, the rotation of the rotating band moving cam axle 4 of camshaft gear wheel 6, and the Movement transmit of bent axle gives camshaft 4, realizes the transmission process of distribution device; Camshaft 4 is installed on the engine and can be rotated, for driving the opening and closing of valve.
During use, motor 21 drives worm screw 19 to rotate to an angle by transmission shaft 20, and because worm screw 19 and worm gear 18 engage each other, worm screw 19 drives worm gear 18 to rotate a certain angle; Because worm gear 18 is fixedly connected with swing arm 17, the swing arm 17 that rotarily drives of worm gear 18 rotates; Swing arm 17 promotes push rod 15 by swing arm hinge 16 and moves, and push rod 15 promotes intermediate gear shaft 2 by push rod hinge 14 and moves; Intermediate gear shaft 2 drives intermediate gear 1 and Control Shaft bearing 8 to rotate a certain angle around camshaft 4; Because intermediate gear 1 engages with driving gear 10 and camshaft gear wheel 6, so camshaft gear wheel 6 will rotate a certain angle relative to driving gear 10 simultaneously; Camshaft gear wheel 6 equals intermediate gear shaft 2 around 2 times of camshaft 4 angle of swing relative to the angle of swing of driving gear 10; Due to the motion of driving gear 10 and the motion of engine crankshaft synchronous in proportion, be equivalent to rotate a certain angle relative to engine crankshaft so camshaft gear wheel 6 rotates a certain angle relative to driving gear 10; Simultaneously because camshaft gear wheel 6 is synchronous with the rotation of camshaft 4, be therefore equivalent to camshaft 4 and change with the relative position of bent axle; Arrive this, achieve the relative change of camshaft 4 relative to engine crankshaft phase place, achieve the change of valve timing; Motor 21 drives worm screw 19 to drive worm gear 18 to turn clockwise after several angle by transmission shaft 20, motion passes to intermediate gear shaft 2 through swing arm 17, swing arm hinge 16, push rod 15 and push rod hinge 14, and pulls intermediate gear shaft 2 and intermediate gear 1 to turn clockwise several angle around camshaft 4; Because cam sense of rotation is that the timing therefore in this situation will be postponed counterclockwise; Otherwise when the sense of rotation of worm gear 18 is counterclockwise, timing will shift to an earlier date; Timing in advance or the angle of postponing equal 2 times of camshaft 4 angle of swing; When having changed valve timing, worm gear 18 and worm screw 19 have locked, and keep timing change constant.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a cone gear CVTC, is characterized in that: comprise intermediate gear (1), intermediate gear shaft (2), camshaft (4), camshaft gear wheel (6), driving gear (10), sprocket wheel (11) and control gear; Described camshaft gear wheel (6), intermediate gear (1) and driving gear (10) are cone gear; Described driving gear (10) and camshaft gear wheel (6) all engage with intermediate gear (1), and are oppositely arranged; Described intermediate gear (1) is fixedly connected with intermediate gear bearing (3), and intermediate gear bearing (3) is set on intermediate gear shaft (2); Described intermediate gear shaft (2) upper end is fixedly connected with control bearing (7), controls bearing (7) and is set on camshaft (4); Described driving gear (10) is fixedly connected with driving gear bearing (9), and driving gear bearing (9) is set on camshaft (4); Described camshaft gear wheel (6) is arranged on camshaft (4) by cam axle key (5); Described sprocket wheel (11) is set on driving gear (10), is connected with driving gear (10) by steering sprocket key (12); Described control gear comprises motor (21) and one-direction driving apparatus, and intermediate gear shaft (2) is connected with motor (21) by one-direction driving apparatus.
2. cone gear CVTC according to claim 1, it is characterized in that: be also fixedly connected with Control Shaft bearing (8) between described intermediate gear shaft (2) upper end and control bearing (7), Control Shaft bearing (8) is set in and controls on bearing (7).
3. cone gear CVTC according to claim 1, is characterized in that: described driving gear (10) is identical with camshaft gear wheel (6) number of teeth.
4. cone gear CVTC according to claim 1, is characterized in that: described one-direction driving apparatus comprises push rod (15) and swing arm (17); One end and the intermediate gear shaft (2) of described push rod (15) are hinged, the other end and swing arm (17) hinged; Swing arm (17) is connected with motor (21) by transmission shaft (20).
5. cone gear CVTC according to claim 4, is characterized in that: be also provided with worm gear (18) and worm screw (19) between described swing arm (17) and transmission shaft (20); Described worm gear (18) opposite end hinged with push rod (15) with swing arm (17) is fixedly connected with; Worm gear (18) center is arranged on engine body (13) by fulcrum is rotating; Worm screw (19) engages with worm gear (18), and is connected with motor (21) by transmission shaft (20).
6. the cone gear CVTC according to claim 4 or 5, it is characterized in that: the central axis of the central axis of described intermediate gear shaft (2), push rod (15) central axis and swing arm (17) is in same plane, and the central axis of this plane orthogonal in camshaft (4) and the central axis of worm gear (18).
7. cone gear CVTC according to claim 4, it is characterized in that: one end of described push rod (15) is hinged by push rod hinge (14) and intermediate gear shaft (2), and the other end is hinged by swing arm hinge (16) and swing arm (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392568.7A CN104895637B (en) | 2015-07-03 | 2015-07-03 | Conical gear CVTC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392568.7A CN104895637B (en) | 2015-07-03 | 2015-07-03 | Conical gear CVTC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104895637A true CN104895637A (en) | 2015-09-09 |
| CN104895637B CN104895637B (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510392568.7A Active CN104895637B (en) | 2015-07-03 | 2015-07-03 | Conical gear CVTC |
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| CN (1) | CN104895637B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825321A (en) * | 2018-05-22 | 2018-11-16 | 浙江大学 | A kind of single shaft bevel gear valve actuating mechanism |
| CN108825325A (en) * | 2018-09-07 | 2018-11-16 | 吉林大学 | A kind of variable valve mechanism for engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5237615A (en) * | 1975-09-19 | 1977-03-23 | Mitsubishi Motors Corp | Variable valve timing device |
| CN86103823A (en) * | 1986-05-20 | 1987-12-02 | 弗雷德里克·迈克尔·斯蒂沃西 | Variable rotary devices |
| GB2202917A (en) * | 1987-03-17 | 1988-10-05 | Ford Motor Co | Variable phase shift mechanism |
| DE3737602A1 (en) * | 1987-11-05 | 1989-05-18 | Interatom | Device for changing the control times of the valves of an internal combustion engine by means of a differential gear |
| US20080087241A1 (en) * | 2006-10-17 | 2008-04-17 | Elias Taye | Camshaft phaser having a differential bevel gear system |
| CN204729145U (en) * | 2015-07-03 | 2015-10-28 | 西华大学 | Cone gear CVTC |
-
2015
- 2015-07-03 CN CN201510392568.7A patent/CN104895637B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5237615A (en) * | 1975-09-19 | 1977-03-23 | Mitsubishi Motors Corp | Variable valve timing device |
| CN86103823A (en) * | 1986-05-20 | 1987-12-02 | 弗雷德里克·迈克尔·斯蒂沃西 | Variable rotary devices |
| GB2202917A (en) * | 1987-03-17 | 1988-10-05 | Ford Motor Co | Variable phase shift mechanism |
| DE3737602A1 (en) * | 1987-11-05 | 1989-05-18 | Interatom | Device for changing the control times of the valves of an internal combustion engine by means of a differential gear |
| US20080087241A1 (en) * | 2006-10-17 | 2008-04-17 | Elias Taye | Camshaft phaser having a differential bevel gear system |
| CN204729145U (en) * | 2015-07-03 | 2015-10-28 | 西华大学 | Cone gear CVTC |
Non-Patent Citations (1)
| Title |
|---|
| 吴洁 宗振奇: "《机械原理》", 31 July 2010, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825321A (en) * | 2018-05-22 | 2018-11-16 | 浙江大学 | A kind of single shaft bevel gear valve actuating mechanism |
| CN108825325A (en) * | 2018-09-07 | 2018-11-16 | 吉林大学 | A kind of variable valve mechanism for engine |
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| Publication number | Publication date |
|---|---|
| CN104895637B (en) | 2017-08-29 |
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Effective date of registration: 20200518 Address after: No. 917, floor 9, building 1, No. 666, middle section of Tianfu Avenue, hi tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu Feiqing Aviation Technology Co., Ltd Address before: 610039, No. 999, Jin Zhou road, Jinniu District, Sichuan, Chengdu Patentee before: XIHUA University |
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