CN201129370Y - Fuel injection pump pre-stroke controlling mechanism power transmission connecting structure - Google Patents
Fuel injection pump pre-stroke controlling mechanism power transmission connecting structure Download PDFInfo
- Publication number
- CN201129370Y CN201129370Y CNU2007201885084U CN200720188508U CN201129370Y CN 201129370 Y CN201129370 Y CN 201129370Y CN U2007201885084 U CNU2007201885084 U CN U2007201885084U CN 200720188508 U CN200720188508 U CN 200720188508U CN 201129370 Y CN201129370 Y CN 201129370Y
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- CN
- China
- Prior art keywords
- motor shaft
- stepping motor
- power transmission
- connecting structure
- shaped
- 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 discloses a power transmission connecting structure of a fuel pump pre-stroke control mechanism, which comprises a stepping motor component and a worm gear pair transmission component. The stepping motor component drives the worm gear pair transmission part to move, the end face of a stepping motor shaft is a D-shaped structure, a connection end of a worm and the stepping motor shaft is provided with a U-shaped groove which is internally provided with a U-shaped key, the U-shaped key is fixed on the excircle of the worm by a fixing sleeve, and the U-shaped key and the U-shaped groove form into a D-shaped hole which matches with the stepping motor shaft in size. By employing the structure of the utility model, deviation range of the axle centers of the two shafts which match with each other can be properly broadened during processing and installation, when a stepping motor starts or changes speed, the U-shaped key plays a role of buffering between the two shafts, and the structure is convenient in installation and reliable in transmission. The power transmission connecting structure has the advantages of reducing the processing difficulty, reliable use and guaranteeing reliability of other parts.
Description
Technical field
The utility model relates to a kind of power transmission connecting structure, relates in particular to a kind of fuel injection pump pre-stroke controlling mechanism power transmission connecting structure.
Background technique
Old-fashioned fuel injection pump pre-stroke controlling mechanism transmits in the linkage structure with pretravel controlling rod parts: directly locked Placement of screw is adopted in being connected of step motor shaft and worm screw.Adopt this Placement just to require each center of rotation of mutual coupling to overlap, this is just very high to the required precision of design and manufacturing, difficulty of processing is big, and each shaft connection place does not have to rise the design of buffer function, impact to axle body when electric motor starting and speed change is very big, damages axle body easily.
Summary of the invention
The utility model provides a kind of step motor shaft easy for installation, that transmitting torque is reliable, transmitting accuracy is high and Placement of worm screw made.
This fuel injection pump pre-stroke controlling mechanism power transmission connecting structure, it comprises: stepper motor parts, worm couple transmission part, the stepper motor parts drive the action of worm couple transmission part, it is characterized in that: the stepper motor axial end becomes D shape structure, has a D type hole and step motor shaft to be complementary on the worm screw.
Described D type hole, its formation: worm screw and step motor shaft connecting end have a U type groove, and a U type key is arranged in the U type groove, and U type key is fixed on the worm screw cylindrical with fixing tight cover, U type key and U type groove form D type hole naturally because of size deviation, and D type hole size and step motor shaft are complementary.
Useful technique effect of the present utility model is: difficulty of processing is low, use is reliable, guarantee other part reliability.
Description of drawings
Accompanying drawing 1, step motor shaft and worm screw joint structural drawing;
Accompanying drawing 2, step motor shaft and worm screw joint sectional drawing;
In the accompanying drawing: step motor shaft 1, U type key 2, fixing tight cover 3, worm screw 4, stepper motor components A, worm couple transmission part B.
Embodiment
A kind of fuel injection pump pre-stroke controlling mechanism power transmission connecting structure, it comprises: stepper motor components A, worm couple transmission part B, the stepper motor components A drives worm couple transmission part B action, its innovative point is: step motor shaft 1 end face becomes D shape structure, has a D type hole and step motor shaft 1 to be complementary on the worm screw 4.
Described D type hole, its formation: worm screw 4 has a U type groove with step motor shaft 1 connecting end, and a U type key 2 is arranged in the U type groove, and the fixing tight cover 3 of U type key 2 usefulness is fixed on worm screw 4 cylindricals, U type key 2 forms D type hole with U type groove naturally because of size deviation, and D type hole size and step motor shaft 1 are complementary.
Adopt linkage structure of the present utility model, can require relative reduction to " center of rotation of two axles of coupling will overlap mutually " this processing with assembling, the deviation range in the axle center of the diaxon that is complementary when promptly processing and installing can suitably be relaxed; When stepper motor startup or speed change, the impact of 1 pair of worm screw 4 of step motor shaft can suitably be cushioned by U type key 2, reduces the impact that worm screw 4 is subjected to, and prolongs the working life of step motor shaft 1 and worm screw 4.
The fuel pump fuel pressure changes frequent, causes fuel injection pump pre-stroke controlling rod component vibration frequent, and linkage structure of the present utility model can be slowed down the influence of this vibration to stepper motor, guarantees its reliability, and install easier, transmission more reliable.
Claims (2)
1, a kind of fuel injection pump pre-stroke controlling mechanism power transmission connecting structure, it comprises: stepper motor parts (A), worm couple transmission part (B), stepper motor parts (A) drive worm couple transmission part (B) action, it is characterized in that: step motor shaft (1) end face becomes D shape structure, has a D type hole and step motor shaft (1) to be complementary on the worm screw (4).
2, fuel injection pump pre-stroke controlling mechanism power transmission connecting structure according to claim 1, it is characterized in that: described D type hole, its formation: worm screw (4) has a U type groove with step motor shaft (1) connecting end, one U type key (2) is arranged in the U type groove, U type key (2) is fixed on worm screw (4) cylindrical with fixing tight cover (3), U type key (2) forms D type hole with U type groove naturally because of size deviation, and D type hole size and step motor shaft (1) are complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201885084U CN201129370Y (en) | 2007-12-14 | 2007-12-14 | Fuel injection pump pre-stroke controlling mechanism power transmission connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201885084U CN201129370Y (en) | 2007-12-14 | 2007-12-14 | Fuel injection pump pre-stroke controlling mechanism power transmission connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129370Y true CN201129370Y (en) | 2008-10-08 |
Family
ID=40017213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201885084U Expired - Fee Related CN201129370Y (en) | 2007-12-14 | 2007-12-14 | Fuel injection pump pre-stroke controlling mechanism power transmission connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201129370Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691660A (en) * | 2017-04-07 | 2018-10-23 | 罗伯特·博世有限公司 | Correct the method and diesel engine system of the distributive value deviation of diesel engine |
-
2007
- 2007-12-14 CN CNU2007201885084U patent/CN201129370Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691660A (en) * | 2017-04-07 | 2018-10-23 | 罗伯特·博世有限公司 | Correct the method and diesel engine system of the distributive value deviation of diesel engine |
| CN108691660B (en) * | 2017-04-07 | 2022-03-15 | 罗伯特·博世有限公司 | Method for correcting fuel injection quantity deviation of diesel engine and diesel engine system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20131214 |