CN203285504U - Screw structure - Google Patents
Screw structure Download PDFInfo
- Publication number
- CN203285504U CN203285504U CN2013202679569U CN201320267956U CN203285504U CN 203285504 U CN203285504 U CN 203285504U CN 2013202679569 U CN2013202679569 U CN 2013202679569U CN 201320267956 U CN201320267956 U CN 201320267956U CN 203285504 U CN203285504 U CN 203285504U
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- CN
- China
- Prior art keywords
- column
- adjusting
- big column
- valve
- groove
- 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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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model discloses a screw structure which is composed of a large column (1), an adjusting column (2) and a supporting column (3). The adjusting column (2) is arranged in the center of the top surface of the large column (1), the supporting column (3) is positioned in the center of the bottom surface, a thread is arranged on the circumferential surface of the large column (1), four grooves (4) which are evenly distributed along the circumference are formed in the circumferential surface of the upper end of the large column (1), and the grooves (4) extend in the axial direction of the large column (1). The screw structure can accurately adjust a gap of a valve, removes professional adjusting tools, is not high in proficiency requirements on operators and has the advantages of being ingenious in design, easy to implement, simple, convenient and quick to operate and the like.
Description
Technical field
The utility model relates to a kind of screw, particularly for the adjusting screw of adjusting the air valve of motor cycle gap.
Background technique
Valve clearance is most important to the performance of motorcycle engine.Valve clearance is excessive: the inlet and outlet door is opened and is lagged, shortened the intake and exhaust time, reduced the Lift of valve, changed normal port timing, make motor because air inlet is not enough, the unclean power of exhaust descends, and the noise of motor is excessive, in addition, the shock of distribution device part is increased, and wearing and tearing are accelerated.Valve clearance is too small: after engine operation, the part expanded by heating is pushed valve open, makes valve-closing not tight, causes gas leakage, and engine power descends and be easily flame-out, makes the serious carbon distribution of sealing surfaces of valve or burns out, even the valve percussion piston.
After motorcycle used a period of time, the valve rocker of motor and valve were through long-term wearing down, and valve clearance will be increasing, therefore need to adjust valve.The most frequently used valve clearance adjusting method is at present: at first unclamp the hold-doun nut of valve adjustments screw, the feeler gauge of predetermined thickness is inserted the place, valve clearance, then the pull feeler gauge rotates adjusting screw with hand on the other hand, until feeler gauge is subject to resistance a little.Adjust appropriate after, feeler gauge is inserted into valve clearance central authorities, it is motionless that adjusting screw keeps, and tightens hold-doun nut locking adjusting screw.After locking screw, then with feeler gauge, remeasure valve clearance, because may rotate unintentionally adjusting screw when locking, valve clearance is changed.If valve clearance changes, till should readjusting correctly.
Above valve adjusting method is carried out with operator's feel and qualification, and not only accuracy is poor, and needs the instrument feeler gauge of specialty, can't guarantee disposable adjusting, and sometimes needs to carry out adjustment repeatedly, complex operation, and the time that spends is long.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of and can carries out fast and the screw of precisely regulating the air valve of motor cycle gap.
The technical solution of the utility model is as follows: a kind of bolt structure, formed by big column (1), adjustable column (2) and fore-set (3), central authorities at described big column (1) end face arrange adjustable column (2), the central authorities of bottom surface arrange fore-set (3), and the circumferential surface of big column (1) is provided with screw thread, be provided with four grooves (4) that distribute by even circumferential on the circumferential surface of described big column (1) upper end, this groove (4) extending axially along described big column (1).
The utility model is set up four grooves on adjusting screw, accordingly, on the end face of adjusting nut, bisectrix is set.When assembled engines, first adjusting screw and adjusting nut zero clearance are fixed, because four grooves on adjusting screw are pressed the even circumferential distribution, therefore has a groove at least in the face of the user, then with the wherein bisectrix on the corresponding adjusting nut of this groove in the face of the user, this bisectrix is just as start index, and then the user just can adjust adjusting screw, make the groove on adjusting screw correspond to the demand bisectrix, then screw adjusting nut and get final product.After regulating, can also verify whether adjust correctly by the bisectrix table on adjusting nut.The utility model matches with the bisectrix on adjusting nut by the groove on adjusting screw, vision-control amount directly perceived, to realize the accurate adjusting to valve clearance, and simple, convenient, quick, the adjustment means that neither needs specialty, operator's qualification is required not high yet, even new hand also can be accurately, expertly grasp.
The width of described groove (4) notch equates with the flight pitch of big column (1), is 1mm.Above structure can not affect relatively rotating between adjusting nut and adjusting screw on the one hand; On the other hand: when valve clearance was regulated, groove can point to the bisectrix on adjusting nut more accurately, made its gap width more accurate.
In order to facilitate processing and fabricating, the upper end of described groove (4) connects to the end face of big column (1).
Described adjustable column (2) is square column, and this adjustable column (2) is structure as a whole with big column (1) and fore-set (3), and three's shaft axis point-blank.Above structure not only is easy to processing and fabricating, guarantees structural strength, and is conducive to hand and pinches adjustable column and apply rotating force, makes valve gap adjustment more convenient operation, laborsaving.
The characteristics such as beneficial effect: the utility model can precisely be regulated valve clearance, neither needs the adjustment means of specialty, operator's qualification is required also not high, has a design ingenious, implements easily, and is simple, convenient, quick.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the schematic diagram of the adjusting nut that matches with the utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, the utility model is comprised of big column 1, adjustable column 2 and fore-set 3, described adjustable column 2 is square column, this adjustable column 2 is positioned at the middle position of big column 1 end face, central authorities in big column 1 bottom surface arrange fore-set 3, big column 1, adjustable column 2 and fore-set 3 are structure as a whole, and three's shaft axis point-blank.Be processed with screw thread on the circumferential surface of described big column 1, the spacing of screw thread is preferably 1mm.The circumferential surface of described big column 1 upper end is provided with four grooves 4 that distribute by even circumferential, and each groove 4 is all along the extending axially of described big column 1, and the upper end of groove 4 connects to the end face of big column 1.The width of described groove 4 notches is preferably 1mm, and the length of groove 4 and the degree of depth are determined according to actual needs.
As shown in Figure 3, the adjusting nut that matches with the utility model has nut body 5, is provided with the bisectrix 6 that distributes by even circumferential on the end face of nut body 5, and the center of circle of described bisectrix 6 circumference that forms is on the shaft axis of nut body 5.
Working principle of the present utility model is as follows:
When assembled engines, first adjusting screw and adjusting nut zero clearance are fixed, because four grooves 4 on adjusting screw are pressed the even circumferential distribution, therefore having a groove 4 at least is in the face of the user's, then with the wherein bisectrix 6 in the face of on user's the corresponding adjusting nut of this groove 4, this bisectrix 6 is just as start index, then the user just can adjust adjusting screw, make the groove 4 on adjusting screw correspond to demand bisectrix 6, then screw adjusting nut and get final product.After regulating, can also verify whether adjust correctly by the bisectrix table on adjusting nut.
Because the flight pitch of adjusting screw is 1mm, so this adjusting screw is revolved the 1mm that only advances and retreat that turns around.Utilize this characteristic,, with respect to the bisectrix of adjusting nut, just can give every bisectrix definition a gap adjusted value.Take 20 of bisectrixs as example, the scale of every bisectrix is 1/20mm=0.05mm.For example producer's regulation valve clearance is 0.3mm, and adjusting screw turns over 6 bisectrixs and gets final product so.When precision prescribed was higher, the number that only needs to improve bisectrix got final product.
After motorcycle uses after a while, in the time of need to regulating valve clearance, can regulate relative valve clearance with reference to aforesaid way, therefore not to repeat here.
Claims (4)
1. bolt structure, formed by big column (1), adjustable column (2) and fore-set (3), central authorities at described big column (1) end face arrange adjustable column (2), the central authorities of bottom surface arrange fore-set (3), and the circumferential surface of big column (1) is provided with screw thread, it is characterized in that: be provided with four grooves (4) that distribute by even circumferential on the circumferential surface of described big column (1) upper end, this groove (4) extending axially along described big column (1).
2. bolt structure according to claim 1, it is characterized in that: the width of described groove (4) notch equates with the flight pitch of big column (1), is 1mm.
3. bolt structure according to claim 1 and 2, it is characterized in that: the upper end of described groove (4) connects to the end face of big column (1).
4. bolt structure according to claim 1, it is characterized in that: described adjustable column (2) is square column, and this adjustable column (2) is structure as a whole with big column (1) and fore-set (3), and three's shaft axis is point-blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202679569U CN203285504U (en) | 2013-05-17 | 2013-05-17 | Screw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202679569U CN203285504U (en) | 2013-05-17 | 2013-05-17 | Screw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203285504U true CN203285504U (en) | 2013-11-13 |
Family
ID=49541873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202679569U Expired - Fee Related CN203285504U (en) | 2013-05-17 | 2013-05-17 | Screw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203285504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277161A (en) * | 2013-05-17 | 2013-09-04 | 力帆实业(集团)股份有限公司 | Adjusting screw for adjusting valve clearance of motorcycle |
-
2013
- 2013-05-17 CN CN2013202679569U patent/CN203285504U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277161A (en) * | 2013-05-17 | 2013-09-04 | 力帆实业(集团)股份有限公司 | Adjusting screw for adjusting valve clearance of motorcycle |
| CN103277161B (en) * | 2013-05-17 | 2015-08-12 | 力帆实业(集团)股份有限公司 | For adjusting the adjusting screw of motorcycle air valve clearance |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20190517 |