CN2240633Y - Permanent crank shaft - Google Patents
Permanent crank shaft Download PDFInfo
- Publication number
- CN2240633Y CN2240633Y CN 95206326 CN95206326U CN2240633Y CN 2240633 Y CN2240633 Y CN 2240633Y CN 95206326 CN95206326 CN 95206326 CN 95206326 U CN95206326 U CN 95206326U CN 2240633 Y CN2240633 Y CN 2240633Y
- Authority
- CN
- China
- Prior art keywords
- center hole
- crank
- eccentric opening
- pitman shaft
- cranks
- 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 permanent motorbike crankshaft which is composed of two cranks, a pitman shaft, a long shaft and a short shaft. Both the center hole and the eccentric hole of each crank are unsmoothed rounds; the pitman shaft mounted between the two cranks and the shaft head sections of the long shaft and the short shaft which are arranged in the center holes of the cranks are also unsmoothed rounds; all matching surfaces are unsmoothed cylinders. Because of the original smooth cylinder fitting changed to unsmoothed cylinder fitting, the utility model effectively prevents the problems of circumferential direction sliding and axial float between the matching surfaces, enhances the service life of the crankshaft and provides convenience for installation and maintenance.
Description
The utility model belongs to a kind of bent axle, is a kind of motorcycle bent axle specifically.
The structure of the motorcycle bent axle that generally uses at present respectively connects a crank as the pitman shaft two ends, each crank respectively connects a transmission shaft, because its cooperation all is that the hole, garden cooperates with the garden axle, axial float appears easily when maintenance or after the long-time running, and the motion of the middle connecting rod of two bent axles is obstructed; In addition, if after the bad or long-time running of quality of fit, then cause the circumferential slip between each fitting surface easily.Above-mentioned situation occurs, cause whole bent axle to repair, can only more renew bent axle.
The purpose of this utility model is to provide a kind of circumferential cooperation solid and reliable, axially is difficult for the permanent motorcycle bent axle of play.
The purpose of this utility model is achieved in that the utility model is by two cranks, pitman shaft, major axis and minor axis are formed, its structure outline is: the center hole of said two cranks and eccentric opening all are non-smooth garden shape through hole, said pitman shaft is installed between said two cranks, two spindle nose cross sections of this pitman shaft are the non-smooth garden shape of matching with eccentric opening and are installed in the eccentric opening, in the center hole of said crank, major axis is installed, the spindle nose cross section that this major axis matches with center hole is a non-smooth garden shape, in the center hole of said another crank minor axis is installed, the spindle nose cross section that this minor axis matches with center hole also is non-smooth garden shape.
As mentioned above, the center hole of said two cranks and eccentric opening all are the through hole that comprises a plane at least, said pitman shaft is installed between said two cranks, two spindle nose cross sections of this pitman shaft are the cross section that has straight line at least of matching with eccentric opening and are installed in the eccentric opening, in the center hole of said crank, major axis is installed, the spindle nose cross section that this major axis matches with center hole is the cross section that has straight line at least, in the center hole of said another crank minor axis is installed, the spindle nose cross section that this minor axis matches with center hole is also for having the cross section of straight line at least.
As mentioned above, the center hole of two cranks and eccentric opening all are more than half garden shape through hole.Pitman shaft is installed between said two cranks, two spindle nose cross sections of this pitman shaft are more than half garden shape of matching with eccentric opening and are installed in the eccentric opening, in the center hole of a said crank, major axis is installed, the spindle nose cross section that this major axis matches with center hole is more than half garden shape, in the center hole of said another crank minor axis is installed, the spindle nose cross section that this minor axis matches with center hole also is more than half garden shape.
As mentioned above, the center hole of said two cranks and eccentric opening all are tapped hole, said pitman shaft is installed between said two cranks, two spindle noses of this pitman shaft are the thread spindle that matches with eccentric opening and are installed in the eccentric opening, in the center hole of said crank, major axis is installed, the spindle nose that this major axis matches with center hole is a thread spindle, in the center hole of said another crank minor axis is installed, and the spindle nose that this minor axis matches with center hole also is thread spindle.
The utility model with between pitman shaft and the crank eccentric opening cooperate and major axis, minor axis and crank center hole between cooperate and change non-smooth garden cylindricality into by the garden cylindricality and cooperate, thereby circumferential slip and axial float problem between each fitting surface of former bent axle have been prevented effectively, improved the working life of bent axle, for installation and maintenance provide convenience.
The utility model since can be further with between pitman shaft and the crank eccentric opening cooperate and major axis, minor axis and crank center hole between cooperate by the garden cylindricality and change the cylindricality cooperation of more than half garden into, radially all increased a cooperation plane axial reaching, thereby circumferential slip and axial float problem between each fitting surface of former bent axle have been prevented more effectively, improved the working life of bent axle, for installation and maintenance provide convenience.
The utility model since also can be further with between pitman shaft and the crank eccentric opening cooperate and major axis, minor axis and crank center hole between cooperate by the garden cylindricality and change screw-thread fit into, thereby circumferential slip and axial float problem between each fitting surface of former bent axle have been prevented more effectively, improved the working life of bent axle, for installation and maintenance provide convenience.
Below in conjunction with accompanying drawing preferred forms of the present utility model is described in further detail.
Fig. 1 is an an embodiment's of the present utility model plan view.
Fig. 2 is the plan view of Fig. 1 crank.
Fig. 3 is another an embodiment's of the present utility model plan view.
From Fig. 1 and Fig. 2 as can be seen, the center hole (7) of crank (2) and crank (3) and eccentric opening (6) all are more than half garden shape through hole, pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle nose cross sections of this pitman shaft (5) are more than half garden shape of matching with eccentric opening (6) and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose cross section that this major axis (1) matches with center hole is more than half garden shape, minor axis (4) is installed in the center hole of said another crank (3), the spindle nose cross section that this minor axis (4) matches with center hole also is more than half garden shape, pitman shaft (5) and crank (2), (3) cooperation between the eccentric opening and major axis (1), minor axis (4) and crank (2), (3) cooperation between the center hole all is that more than half garden cylinder adds one section plane, like this, each fitting surface just can not produce circumferential slip.The medium axle diameter and two cranks of pitman shaft (5) have the radial fit plane, so two cranks can so just can not influence link motion at pitman shaft (5) axial float yet.Improved the working life of bent axle, for installation and maintenance provide convenience.
As can be seen from Figure 3, the center hole of said crank (2) and crank (3) and eccentric opening all are tapped hole, said pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle noses of this pitman shaft (5) are the thread spindle that matches with eccentric opening and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose that this major axis (1) matches with center hole is a thread spindle, minor axis (4) is installed in the center hole of said another crank (3), and the spindle nose that this minor axis (4) matches with center hole also is thread spindle.Since with between pitman shaft and the crank eccentric opening cooperate and major axis, minor axis and crank center hole between cooperate by the garden cylindricality and change screw-thread fit into, thereby circumferential slip and axial float problem between each fitting surface of former bent axle have been prevented, for installation and maintenance provide convenience.
Claims (4)
1, a kind of permanent motorcycle bent axle, by two cranks, pitman shaft, major axis and minor axis are formed, it is characterized in that: the center hole (7) of said crank (2) and crank (3) and eccentric opening (6) all are non-smooth garden shape through hole, said pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle nose cross sections of this pitman shaft (5) are the non-smooth garden shape of matching with eccentric opening (6) and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose cross section that this major axis (1) matches with center hole is a non-smooth garden shape, minor axis (4) is installed in the center hole of said another crank (3), and the spindle nose cross section that this minor axis (4) matches with center hole also is non-smooth garden shape.
2. permanent motorcycle bent axle according to claim 1, it is characterized in that: the center hole (7) of said crank (2) and crank (3) and eccentric opening (6) all are the through hole that comprises a plane at least, said pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle nose cross sections of this pitman shaft (5) are the cross section that has straight line at least of matching with eccentric opening (6) and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose cross section that this major axis (1) matches with center hole is the cross section that has straight line at least, minor axis (4) is installed in the center hole of said another crank (3), and the spindle nose cross section that this minor axis (4) matches with center hole is also for having the cross section of straight line at least.
3, permanent motorcycle bent axle according to claim 1 and 2, it is characterized in that: the center hole (7) of said crank (2) and crank (3) and eccentric opening (6) all are more than half garden shape through hole, said pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle nose cross sections of this pitman shaft (5) are more than half garden shape of matching with eccentric opening (6) and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose cross section that this major axis (1) matches with center hole is more than half garden shape, minor axis (4) is installed in the center hole of said another crank (3), and the spindle nose cross section that this minor axis (4) matches with center hole also is more than half garden shape.
4, permanent motorcycle bent axle according to claim 1, it is characterized in that: the center hole of said crank (2) and crank (3) and eccentric opening all are tapped hole, said pitman shaft (5) is installed in said two cranks (2), (3) between, two spindle noses of this pitman shaft (5) are the thread spindle that matches with eccentric opening and are installed in the eccentric opening, major axis (1) is installed in the center hole of said crank (2), the spindle nose that this major axis (1) matches with center hole is a thread spindle, minor axis (4) is installed in the center hole of said another crank (3), and the spindle nose that this minor axis (4) matches with center hole also is thread spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206326 CN2240633Y (en) | 1995-03-21 | 1995-03-21 | Permanent crank shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206326 CN2240633Y (en) | 1995-03-21 | 1995-03-21 | Permanent crank shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2240633Y true CN2240633Y (en) | 1996-11-20 |
Family
ID=33858288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95206326 Expired - Fee Related CN2240633Y (en) | 1995-03-21 | 1995-03-21 | Permanent crank shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2240633Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100821A (en) * | 2017-03-30 | 2017-08-29 | 上乘精密科技（苏州）有限公司 | A kind of camshaft |
-
1995
- 1995-03-21 CN CN 95206326 patent/CN2240633Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100821A (en) * | 2017-03-30 | 2017-08-29 | 上乘精密科技（苏州）有限公司 | A kind of camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |