CN201258768Y - Gear assembly for engine - Google Patents
Gear assembly for engine Download PDFInfo
- Publication number
- CN201258768Y CN201258768Y CNU200820185953XU CN200820185953U CN201258768Y CN 201258768 Y CN201258768 Y CN 201258768Y CN U200820185953X U CNU200820185953X U CN U200820185953XU CN 200820185953 U CN200820185953 U CN 200820185953U CN 201258768 Y CN201258768 Y CN 201258768Y
- Authority
- CN
- China
- Prior art keywords
- gear
- camshaft
- idle
- drive
- injection pump
- 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
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Abstract
The utility model relates to a gear drive device of an engine, which is characterized in that a bottom plate is fixed on an engine body; a central shaft, a first idler gear shaft, a camshaft, a second idler gear shaft and an output shaft are arranged on the bottom plate; the central shaft is provided with a large gear and a small gear which are engaged with each other; the large gear are engaged with a crank timing gear; a camshaft driving gear is arranged on the camshaft; a first idler gear is arranged on the first idler gear shaft; a second idler gear in arranged on the second idler gear shaft; the small gear is respectively engaged with the first idler gear and the second idler gear; the first idler gear is engaged with the camshaft driving gear; the second idler gear is engaged with an oil injection pump gear; and the oil injection pump gear is fixed on an output shaft. The utility model has the advantages of simple structure and clear principle, saves the radial space, reduces the volume of the whole gear chamber, and ensures that the rotating speed of the camshaft driving gear and the oil injection pump gear is half of the rotating speed of the crank timing gear.
Description
Technical field
The utility model relates to a kind of gear drive of motor, relates in particular to a kind of gear transmission series structure of motor, belongs to technical field of internal combustion engines.
Background technique
For four stroke engine, whenever finish a work cycle, each cylinder intake and exhaust once, just bent axle changeed for two weeks, and camshaft only rotates a circle, so the velocity ratio of bent axle and camshaft is 2: 1; In like manner, also to require be 2: 1 to the velocity ratio of bent axle and oil injection pump driving gear.Existing engine gear power train generally is arranged in the gear chamber of engine body.Be equipped with parts such as crankshaft timing gear and some idle gears in the gear chamber, by after the multi-change speed transmission, just can reach crankshaft timing gear respectively with velocity ratio requirements in 2: 1 of camshaft drive gear and oil injection pump driving gear.The motor of this structure, owing to only considered the requirement of velocity ratio, and do not considered the volume size and the driving gear size of gear chamber to cause the gear number many, gear chamber is difficult to accomplish little overall volume, and fuel injection pump gear and camshaft drive gear are difficult to also accomplish that volume is little.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, can guarantee correct velocity ratio thereby provide a kind of, and the gear drive of the little motor of volume.
The technological scheme that provides according to the utility model, the gear drive of motor comprises engine body, crankshaft timing gear, camshaft drive gear, fuel injection pump gear, bent axle, camshaft, crankshaft installed is in body, and crankshaft timing gear is installed on the bent axle; Feature is: fixing bottom-plate on the described engine body, mounting center axle on base plate, the first idle gear axle, camshaft, second idle gear axle and the output shaft, be coaxially installed with gearwheel and small gear on the central shaft), gearwheel and crankshaft timing gear engagement, camshaft drive gear is installed on the camshaft, first idle gear is installed on the first idle gear axle, second idle gear is installed on the second idle gear axle, small gear meshes with first idle gear and second idle gear respectively, first idle gear and camshaft drive gear engagement, second idle gear and fuel injection pump gear engagement, fuel injection pump gear is fixed on the output shaft.
The gear ratio of described gearwheel and crankshaft timing gear is 2: 1, and the number of teeth of small gear equates with the number of teeth of camshaft drive gear and fuel injection pump gear.
Described base plate is provided with gear chamber cover.Described gear chamber cover internal surface is provided with shrinkage pool, and described central shaft end is provided with spindle nose, and described shrinkage pool matches with described spindle nose.
Compared with the prior art the utility model has the following advantages:
1, the utility model comes transmission by coaxial mounted large and small gear and first, second idle gear, and simple in structure, principle is clear.
2, the coaxial installation of large and small gear, and small gear lacks than the gearwheel number of teeth, can save radial space, the therefore smaller volume of whole gear chamber.
3, idle gear can not change velocity ratio, and the gear ratio of gearwheel and crankshaft timing gear is 2: 1, the number of teeth of small gear equates that with the number of teeth of camshaft drive gear and fuel injection pump gear the rotating speed that can guarantee camshaft drive gear and fuel injection pump gear like this is half of crankshaft timing gear.
4, gear chamber cover was positioned on the base plate by shrinkage pool and cooperating of spindle nose, located simple and reliable.
Description of drawings
Fig. 1 is a structural front view of the present utility model, has wherein removed gear chamber cover.
Fig. 2 is the A-A sectional view among Fig. 1.
Fig. 3 is the B-B sectional view among Fig. 1.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
Fig. 1～shown in Figure 3 comprises body 1, base plate 2, crankshaft timing gear 3, gearwheel 4, small gear 5, the first idle gears 6, camshaft drive gear 7, the second idle gears 8, fuel injection pump gear 9, bent axle 10, central shaft 11, the first idle gear axles 12, camshaft 13, the second idle gear axles 14, output shaft 15, gear chamber cover 16, shrinkage pool 17, spindle nose 18 etc.
As Fig. 1～shown in Figure 3, the utility model base plate 2 is fixed on the front end end face of engine body 1, and bent axle 10 is installed in the body 1, and crankshaft timing gear 3 is installed on the bent axle 10.On base plate 2, pass through bolt mounting center axle 11, the first idle gear axle 12, camshaft 13, the second idle gear axle 14 and output shaft 15 respectively.Be coaxially installed with gearwheel 4 and small gear 5 on the central shaft 11, gearwheel 4 and crankshaft timing gear 3 engagements, camshaft drive gear 7 is installed on the camshaft 13, and first idle gear 6 is installed on the first idle gear axle 12, and second idle gear 8 is installed on the second idle gear axle 14.Small gear 5 meshes with first idle gear 6 and second idle gear 8 respectively, first idle gear 6 and camshaft drive gear 7 engagements, second idle gear 8 and fuel injection pump gear 9 engagements.Camshaft drive gear 7 is installed on the camshaft 13, fuel injection pump gear 9 by bolton on output shaft 15.Gearwheel 4 is 2: 1 with the gear ratio of crankshaft timing gear 3, and the number of teeth of small gear 5 equates with the number of teeth of camshaft drive gear 7 and fuel injection pump gear 9.
Described base plate 2 is provided with gear chamber cover 16.Gear chamber cover 16 internal surfaces are provided with shrinkage pool 17, and central shaft 11 ends are provided with spindle nose 18, and shrinkage pool 17 matches with spindle nose 18.Gear chamber cover 16 was positioned on the base plate 2 by shrinkage pool 17 and cooperating of spindle nose 18.
Transmission process of the present utility model is as follows:
(1) camshaft drive path: the gear ratio of crankshaft timing gear 3 and gearwheel 4 is set to 1: 2, the rotating speed that is delivered to gearwheel 4 by crankshaft timing gear 3 is lowered half, gives first idle gear 6 by the small gear 5 identical with gearwheel 4 rotating speeds with transmission of power then.Because small gear 5 numbers of teeth are few, so smaller volume.First idle gear 6 is given camshaft drive gear 7 with transmission of power because first idle gear 6 can't change velocity ratio, so camshaft drive gear 7 rotating speeds with small gear 5, meaning is that camshaft drive gear 7 rotating speeds are half of crankshaft timing gear 3 rotating speeds.
(2) Injection Pump drive path: a part of transmission of power of small gear 5 is given second idle gear 8, second idle gear 8 is given fuel injection pump gear 9 with transmission of power again, because second idle gear 8 can't change velocity ratio, therefore the rotating speed of fuel injection pump gear 9 is identical with small gear 5, and meaning is that the rotating speed of fuel injection pump gear 9 is half of crankshaft gear rotating speed.
Claims (6)
1, a kind of gear drive of motor, comprise engine body (1), crankshaft timing gear (3), camshaft drive gear (7), fuel injection pump gear (9), bent axle (10), camshaft (13) and output shaft (15), bent axle (10) is installed in the body (1), and crankshaft timing gear (3) is installed on the bent axle (10); It is characterized in that: described engine body (1) is gone up fixing bottom-plate (2), go up mounting center axle (11) at base plate (2), the first idle gear axle (12), camshaft (13), the second idle gear axle (14) and output shaft (15), be coaxially installed with gearwheel (4) and small gear (5) on the central shaft (11), gearwheel (4) and crankshaft timing gear (3) engagement, camshaft drive gear (7) is installed on the camshaft (13), first idle gear (6) is installed on the first idle gear axle (12), second idle gear (8) is installed on the second idle gear axle (14), small gear (5) meshes with first idle gear (6) and second idle gear (8) respectively, first idle gear (6) and camshaft drive gear (7) engagement, second idle gear (8) and fuel injection pump gear (9) engagement, fuel injection pump gear (9) is fixed on the output shaft (15).
2, the gear drive of motor according to claim 1 is characterized in that the described gearwheel (4) and the gear ratio of crankshaft timing gear (3) are 2: 1.
3, the gear drive of motor according to claim 1 is characterized in that the number of teeth of described small gear (5) equates with the number of teeth of camshaft drive gear (7) and fuel injection pump gear (9).
4, the gear drive of motor according to claim 1 is characterized in that described base plate (2) is provided with gear chamber cover (16).
5, the gear drive of motor according to claim 4 is characterized in that described gear chamber cover (16) internal surface is provided with shrinkage pool (17).
6, the gear drive of motor according to claim 1 is characterized in that described central shaft (11) end is provided with spindle nose (18), and described spindle nose (18) matches with shrinkage pool (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820185953XU CN201258768Y (en) | 2008-09-03 | 2008-09-03 | Gear assembly for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820185953XU CN201258768Y (en) | 2008-09-03 | 2008-09-03 | Gear assembly for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201258768Y true CN201258768Y (en) | 2009-06-17 |
Family
ID=40773000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820185953XU Expired - Fee Related CN201258768Y (en) | 2008-09-03 | 2008-09-03 | Gear assembly for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201258768Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025611A1 (en) * | 2008-09-03 | 2010-03-11 | 无锡开普机械有限公司 | A gear assembly for an engine |
| WO2013020354A1 (en) * | 2011-08-05 | 2013-02-14 | 无锡开普动力有限公司 | V-shaped engine inline pump gear transmission structure |
-
2008
- 2008-09-03 CN CNU200820185953XU patent/CN201258768Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010025611A1 (en) * | 2008-09-03 | 2010-03-11 | 无锡开普机械有限公司 | A gear assembly for an engine |
| WO2013020354A1 (en) * | 2011-08-05 | 2013-02-14 | 无锡开普动力有限公司 | V-shaped engine inline pump gear transmission structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 Termination date: 20140903 |
|
| EXPY | Termination of patent right or utility model |