CN201891523U - Automatic oil return device used between crankshaft cavity and speed change cavity - Google Patents
Automatic oil return device used between crankshaft cavity and speed change cavity Download PDFInfo
- Publication number
- CN201891523U CN201891523U CN 201020659275 CN201020659275U CN201891523U CN 201891523 U CN201891523 U CN 201891523U CN 201020659275 CN201020659275 CN 201020659275 CN 201020659275 U CN201020659275 U CN 201020659275U CN 201891523 U CN201891523 U CN 201891523U
- Authority
- CN
- China
- Prior art keywords
- oil return
- speed change
- cavity
- crankshaft
- leaf spring
- 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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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model belongs to the technical field of a motorcycle engine crankcase, in particular to an automatic oil return device used between a crankshaft cavity and a speed change cavity. The crankshaft cavity (2) positioned in a crankcase body (1) and the speed change cavity (7) are connected into one body through an oil return passage (3), one end of the oil return passage (3) communicated with the speed change cavity (7) is provided with an automatic oil return device which mainly comprises an oil return leaf spring valve (5) and a leaf spring valve support plate (6), the leaf spring valve support plate (6) is used for supporting the oil return leaf spring valve (5), and the elastic oil return leaf spring valve (5) has the length that the oil return passage (3) can be just blocked by the oil return leaf spring valve (5). The pressure of the crankshaft cavity and the speed change cavity when an engine operates is different from the pressure when the engine does not operate, so the oil return leaf spring valve is closed or opened, the cleanness of the inside environment of the crankshaft cavity is ensured, a crankshaft in high-speed operation is protected, and the service life of the engine is prolonged.
Description
Technical field
The utility model belongs to the crankshaft box of motorcycle engine technical field, relates generally to a kind of automatic oil return device that is used between crankshaft cavity and the speed change chamber.
Background technique
At present, communicate between crankshaft cavity in the domestic crankshaft box of motorcycle engine body and the speed change chamber, in engine operation process, can cause the machine oil that contains impurity such as iron filings in the speed change chamber to flow in the crankshaft cavity, the bent axle that runs up is caused damage, shorten the working life of motor.
Summary of the invention
For solving the problems of the technologies described above, the purpose of this utility model is to propose a kind of automatic oil return device that is used between crankshaft cavity and the speed change chamber, makes its cleaning that can guarantee the crankshaft cavity internal environment, the bent axle that protection runs up, the working life of improving motor.
The utility model is to finish the technological scheme that its invention task taked to be: a kind of automatic oil return device that is used between crankshaft cavity and the speed change chamber, and described crankshaft cavity and the speed change chamber that is positioned at crankcase body is connected as a single entity by back oil road; One in described back oil road connection speed change chamber is provided with the automatic oil return device; Described automatic oil return device mainly comprises the oil return leaf valve and is used to support the leaf valve dunnage of oil return leaf valve; The length of described rubber-like oil return leaf valve is advisable can block up back oil road.
A kind of automatic oil return device that is used between crankshaft cavity and the speed change chamber that the utility model proposes; utilize crankshaft cavity and speed change chamber different at the pressure of engine running whether the time; make the oil return leaf valve close or open; make the machine oil that in engine operation process, contains impurity such as iron filings in the speed change chamber can't flow in the crankshaft cavity; and the clean machine oil in the crankshaft cavity can flow in the speed change chamber automatically by the pressure of crankshaft rotating generation; make the oil level in crankshaft cavity and the speed change chamber obtain balance; and the knot that has guaranteed the crankshaft cavity internal environment is clean; the bent axle that protection runs up, the working life of having improved motor.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure, 1, crankcase body, 2, crankshaft cavity, 3, back oil road, 4, screw, 5, the oil return leaf valve, 6, the leaf valve dunnage, 7, the speed change chamber.
Embodiment
With embodiment the utility model is illustrated in conjunction with the accompanying drawings:
As shown in Figure 1: a kind of automatic oil return device that is used between crankshaft cavity and the speed change chamber, the described crankshaft cavity 2 that is positioned at crankcase body 1 is connected as a single entity by back oil road 3 with speed change chamber 7; One in described back oil road 3 connection speed change chambeies 7 is provided with the automatic oil return device; Described automatic oil return device mainly comprises oil return leaf valve 5 and is used to support the leaf valve dunnage 6 of oil return leaf valve 5; The length of described rubber-like oil return leaf valve is advisable can block up back oil road.
When motor does not turn round, rubber-like oil return leaf valve 5 stops up back oil road 3, in engine operation process: when piston moves downward, pressure in the crankshaft cavity 2 is greater than the pressure in the speed change chamber 7, at this moment oil return leaf valve 5 is opened, and the machine oil in the crankshaft cavity 2 flows in the speed change chamber 7 automatically; When piston moved upward, the pressure in the crankshaft cavity 2 was less than the pressure in the speed change chamber 7, and at this moment oil return leaf valve 5 cuts out, and the machine oil that speed change chamber 7 contains impurity such as iron filings just can't flow in the crankshaft cavity 2.
Claims (1)
1. automatic oil return device that is used between crankshaft cavity and the speed change chamber, the described crankshaft cavity (2) that is positioned at crankcase body (1) is connected as a single entity by back oil road (3) with speed change chamber (7); It is characterized in that: one in described back oil road (3) connection speed change chamber (7) is provided with the automatic oil return device; Described automatic oil return device mainly comprises oil return leaf valve (5) and is used to support the leaf valve dunnage (6) of oil return leaf valve (5); The length of described rubber-like oil return leaf valve (5) is advisable can block up back oil road (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020659275 CN201891523U (en) | 2010-12-10 | 2010-12-10 | Automatic oil return device used between crankshaft cavity and speed change cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020659275 CN201891523U (en) | 2010-12-10 | 2010-12-10 | Automatic oil return device used between crankshaft cavity and speed change cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891523U true CN201891523U (en) | 2011-07-06 |
Family
ID=44220997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020659275 Expired - Fee Related CN201891523U (en) | 2010-12-10 | 2010-12-10 | Automatic oil return device used between crankshaft cavity and speed change cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891523U (en) |
-
2010
- 2010-12-10 CN CN 201020659275 patent/CN201891523U/en not_active Expired - Fee Related
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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: 20110706 Termination date: 20181210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |