CN102287483B - Double-pitch time-sharing meshed tooth-shape chain board - Google Patents
Double-pitch time-sharing meshed tooth-shape chain board Download PDFInfo
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- CN102287483B CN102287483B CN2011102330799A CN201110233079A CN102287483B CN 102287483 B CN102287483 B CN 102287483B CN 2011102330799 A CN2011102330799 A CN 2011102330799A CN 201110233079 A CN201110233079 A CN 201110233079A CN 102287483 B CN102287483 B CN 102287483B
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- chain board
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Abstract
The invention relates to a double-pitch time-sharing meshed tooth-shape chain board, belonging to the field of mechanical design and manufacture and chain driving. The chain board has double pitch on a meshing line, three teeth are distributed on each piece of the chain board, the outer tooth profile lines of the first and the third tooth profiles are straight lines, the apothem f1 of the chain board is 0.96-0.98 times than the apothem f of the standard tooth-shape chain board, the inner tooth profile line is a convex curve with a protrusion delta equal to 0.01f-0.03f, and the tooth profile line of the second tooth is a straight line tooth profile. The invention has the following advantages: when transporting and driving the same load, the chain board has stable tooth mesh-in and mesh-out, small shock and vibration and noise, less material consumption, high motion precision and good reliability, thus the chain board is particularly suitable for the transportation of the parts in an automobile assembly.
Description
Technical field
The invention belongs to Machine Design manufacturing and field of chain transmission, be applicable to the steady conveying on the various conveyor lines.
Background technique
Silent chain is a kind of widely used important mechanical basic part.Because the characteristics that the noise of silent chain own is little, reliability is high, kinematic accuracy is high; Be widely used in timing system, oil pump system, transmission system, steam turbine, aircraft, the lathe of motor car engine in recent years, especially on various automatic lines, more brought into play irreplaceable effect with its exclusive advantage.Its type of belt drive is superior to toothed belt transmission, gear transmission and roller chain drives.The profile of tooth chain of traditional standard is that each carrier bar is that single-unit is wide apart from bidentate; The out conductor of carrier bar is a straight-side profile; The inboard is straight line or inner concave curve; It and standard straight-tooth silent chain sprocket engagement, the engagement of each chain link and sprocket wheel was accomplished in moment, thereby shock and vibration are big, noise is big, wearing and tearing are serious, transmission efficiency is lower.Since traditional chain, each pitch, just hinged by a bearing pin, the quality of whole like this chain is bigger, is not suitable for Conveying chains, and the deadweight of Conveying chains has a strong impact on the performance of conveyor.Simultaneously, in the engagement driving process, because the quality of impact energy and chain is proportional, so the vibration that traditional chain produces is bigger, can produce big noise like this, befouling environment also can be given the kinematic accuracy of chain and brought considerable influence working life.Be unfavorable on the auto production line component steadily, the conveying of efficient, low noise.
Summary of the invention
The present invention provides a kind of bipatch timesharing engaging tooth shape chain carrier bar, be applied in conveyor and improve quality greatly to solve traditional profile of tooth chain, moment mesh impact, produce big noise, influence the problems such as kinematic accuracy and working life of chain.
The technological scheme that the present invention takes is: on the carrier bar line of contact, have double pitch, and three teeth that distribute on the every carrier bar, the external tooth profile of first and the 3rd flank profil is a straight line, apothem f
1Be 0.96 ~ 0.98 times of the apothem f of standard tooth form chain carrier bar, the internal tooth profile is the curve of evagination, overhang δ=0.01f ~ 0.03f, and the flank profil line of second tooth is a straight-side profile, the carrier bar parameter calculation formula is following: pitch P
1=2Pcos (180 °/Z), center tooth tooth-shape angle α
1=2 β, tooth-shape angle α
2=2 φ+2 β, carrier bar engagement circular diameter d=p/sin (180 °/Z), carrier bar tip diameter d
1=d-2h
1, wherein β be respective sprockets groove angle β=30 °-(180 °/Z), φ is respective sprockets minute of angle φ=360 °/Z, P is the pitch of standard tooth form chain, Z is the number of teeth of respective sprockets, f is the apothem of standard tooth form chain, h
1Be the hole heart of standard tooth form chain distance to tooth top.
The objective of the invention is under the identical situation of thickness of link plates; Carry identical load; Newly-designed chain is compared with the conventional chains of same pitch; Every meter chain reduces by 20%-30% on weight, have low impact, low noise, be fit in low speed, heavy duty, efficient, highi degree of accuracy, require the driving mechanism of the high profile of tooth chain and sprocket of reliability.
The present invention is that the chain of bipatch three flank profil silent chain carrier bars and the straight-tooth silent chain sprocket wheel of standard carry out engagement driving.
The bipatch of bipatch three flank profil carrier bars of the present invention is newly to design the pitch of carrier bar, is the twice of traditional carrier bar pitch, and three flank profils are three teeth that distribute on the every carrier bar.When being assembled into chain, compare with traditional silent chain chain, save the hinged overlapping part of bearing pin and half carrier bar of half quantity, from the quality of chain, just practiced thrift wide variety of materials like this, also simple relatively aspect manufacturing process.Under the identical situation of bearing load, also reduce the quality of whole piece chain, thereby can alleviate mesh impact, reduced wearing and tearing, reduce noise, increase the working life of chain and sprocket wheel, guarantee delivery reliability.
The present invention is from definite polygon effect that reduces of pitch.For the bipatch silent chain, traditional relatively silent chain has increased one times on pitch.But the present invention designs through the structure to carrier bar, can compensate polygon effect, eliminates a certain amount of polygon effect.Connect two chain plate holes of bipatch, the distance of gained is less than the twice pitch, for the pitch design of bipatch carrier bar, confirms the pitch diameter that is meshed with sprocket wheel earlier; On this pitch circle, choosing a pitch, two end points of this pitch are dropped on the pitch circle, is basic point with one of them end points again; In an other side, on pitch circle, get a pitch, so just found the carrier bar hole circle heart of bipatch carrier bar; The carrier bar pitch that obtains like this is the twice of traditional silent chain carrier bar pitch, but from transmission; Polygonal is less than the twice pitch, also satisfies the engagement requirement, and the polygon effect that like this bipatch silent chain is brought has extraordinary compensation.
In the present invention, reduce from the design of bipatch carrier bar flank profil and impact and reduce wear.The external tooth profile of first and the 3rd tooth is a straight-side profile, apothem f
1Be 0.96f ~ 0.98f, the internal tooth profile is the curvilinear tooth profile of evagination, and the interior flank profil of the 3rd tooth contacts with sprocket wheel earlier in engagement process like this; Along with the rotation of sprocket wheel, the interior flank profil of the 3rd tooth is indentation in the outer teeth profile of first tooth of adjacent carrier bar on the same hinge gradually, forwards the outer teeth profile engagement gradually to by interior flank profil engagement like this; Along with being rotated further of sprocket wheel; Mesh with second tooth again, and the second last tooth and sprocket engagement location, the outer teeth profile of first and the 3rd tooth and sprocket tooth break away from; Second tooth flank profil line of bipatch carrier bar is straight-side profile; In engagement process, play positioning action, make smooth operation after chain and the sprocket engagement, carry the load of transmitting when meshing fully with sprocket wheel.Realized the timesharing engagement of interior flank profil, outer teeth profile and middle flank profil and sprocket wheel like this; This timesharing engagement is carried out replacing the shearing position of bearing pin; Can prolong the working life of bearing pin, simultaneously, carrier bar is also replacing the load of carrying transmission; Also can alleviate the wearing and tearing of carrier bar, prolong the working life of carrier bar.Can reduce the wearing and tearing and the impact of chain and sprocket wheel like this, reduce noise, prolong the working life of chain, reliability is high.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of guide plate of the present invention;
Fig. 3 is the whole piece chain structure schematic representation that the present invention forms with bipatch timesharing engaging tooth shape chain carrier bar;
Fig. 4 is the whole piece chain structure schematic representation that the present invention forms with bipatch timesharing engaging tooth shape chain carrier bar;
Fig. 5 is the chain of bipatch timesharing engaging tooth shape chain carrier bar and the mesh schematic representation of standard straight-tooth silent chain sprocket wheel.
Embodiment
On the carrier bar line of contact, have double pitch, three teeth that distribute on the every carrier bar, the external tooth profile of first and the 3rd flank profil is a straight line, apothem f
1Be 0.96 ~ 0.98 times of the apothem f of standard tooth form chain carrier bar, the internal tooth profile is the curve of evagination, overhang δ=0.01f ~ 0.03f, and the flank profil line of second tooth is a straight-side profile, the carrier bar parameter calculation formula is following: pitch P
1=2Pcos (180 °/Z), center tooth tooth-shape angle α
1=2 β, tooth-shape angle α
2=2 φ+2 β, carrier bar engagement circular diameter d=p/sin (180 °/Z), carrier bar tip diameter d
1=d-2h
1, wherein β be respective sprockets groove angle β=30 °-(180 °/Z), φ is respective sprockets minute of angle φ=360 °/Z, P is the pitch of standard tooth form chain, Z is the number of teeth of respective sprockets, f is the apothem of standard tooth form chain, h
1Be the hole heart of standard tooth form chain distance to tooth top.
Below in conjunction with figure patent of the present invention is further specified
Based on Fig. 1-Fig. 5, the present invention will be described.Fig. 1 is the structure profile of tooth figure of bipatch tooth shape chain board; The 11st, the straight line outer teeth profile of carrier bar first and the 3rd tooth; The 12nd, first tooth of carrier bar, the 13rd, first with the convex outer curve of the 3rd tooth in flank profil, 14 is straight-side profiles of second tooth; The 15th, second tooth of carrier bar, the 16th, the 3rd tooth of carrier bar.Fig. 2 is the structural drawing of bipatch silent chain guide plate.Fig. 3 and Fig. 4 are the lateral view of chain, for flank profil and the fit that better shows chain, provide the schematic representation of two side direction of chain, and 31 is guide plate, the horizontal looseness of restriction chain on sprocket wheel.Fig. 5 is the explanatory drawing of the engagement positioning states of expression bipatch profile of tooth chain and sprocket, the 51st, a chain link on the chain, the 52nd, on the chain with 51 adjacent link on same bearing pin, the 53rd, standard straight tooth sprocket.In engagement process, the interior flank profil of 51 the 3rd tooth contacts the rotation along with 53 earlier with 53; In the outer teeth profile of first tooth of indentation 52, the outer teeth profile of first tooth of 52 contacts with 53 the interior flank profil of 51 the 3rd tooth gradually, along with 53 be rotated further; Second tooth of 52 contacts engagement with 53; Locate at last, the outer teeth profile of first and the 3rd tooth of 52 and sprocket tooth break away from, and accomplish a complete engaging-in process.
Instance of the present invention: with the chain pitch is that 15.875mm is an example, and bipatch chain plate structure is as shown in Figure 1.
For traditional silent chain chain CL10; Internal guiding type, the carrier bar number is 15, limit in mean tension load 50.6kN; The weight of every meter chain is 2.21kg; Through experiment, the chain of bipatch timesharing engaging tooth shape chain carrier bar is satisfying under the situation of identical transmitted load, and the weight of every meter chain is 1.64kg.
Claims (1)
1. bipatch timesharing engaging tooth shape chain carrier bar, it is characterized in that: carrier bar has double pitch on line of contact, three teeth that distribute on the every carrier bar, the external tooth profile of first and the 3rd flank profil is a straight line, apothem f
1Be 0.96 ~ 0.98 times of the apothem f of standard tooth form chain carrier bar, the internal tooth profile is the curve of evagination, overhang δ=0.01f ~ 0.03f, and the flank profil line of second tooth is a straight-side profile, the carrier bar parameter calculation formula is following: pitch P
1=2Pcos (180 °/Z), the second tooth tooth-shape angle α
1=2 β, tooth-shape angle α
2=2 φ+2 β, carrier bar engagement circular diameter d=p/sin (180 °/Z), carrier bar tip diameter d
1=d-2h
1, wherein β be respective sprockets groove angle β=30 °-(180 °/Z), φ is respective sprockets minute of angle φ=360 °/Z, P is the pitch of standard tooth form chain, Z is the number of teeth of respective sprockets, f is the apothem of standard tooth form chain, h
1Be the hole heart of standard tooth form chain distance to tooth top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102330799A CN102287483B (en) | 2011-08-12 | 2011-08-12 | Double-pitch time-sharing meshed tooth-shape chain board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102330799A CN102287483B (en) | 2011-08-12 | 2011-08-12 | Double-pitch time-sharing meshed tooth-shape chain board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102287483A CN102287483A (en) | 2011-12-21 |
| CN102287483B true CN102287483B (en) | 2012-11-28 |
Family
ID=45334151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102330799A Expired - Fee Related CN102287483B (en) | 2011-08-12 | 2011-08-12 | Double-pitch time-sharing meshed tooth-shape chain board |
Country Status (1)
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| CN (1) | CN102287483B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244608A (en) * | 2012-02-10 | 2013-08-14 | 东莞市万方消防设备有限公司 | Rack chain for lifesaving |
| US9476481B2 (en) | 2014-04-15 | 2016-10-25 | Ford Global Technologies, Llc | Drive chain |
| CN107187797A (en) * | 2017-05-12 | 2017-09-22 | 象州县科学技术情报研究所 | Suitable for chemical industry Chain conveyer conveyer belt structure |
| CN110657197B (en) * | 2019-10-28 | 2021-05-11 | 中国第一汽车股份有限公司 | Design method of timing tooth-shaped chain system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7740555B2 (en) * | 2005-10-14 | 2010-06-22 | Borgwarner Inc. | Sprocket tooth profile for a roller or bush chain |
| CN101344160B (en) * | 2007-07-11 | 2011-06-08 | 闵德仁 | Chain sprocket wheel with variable pitch |
| CN101761606B (en) * | 2008-12-25 | 2013-01-02 | 杭州东华链条集团有限公司 | Silencing chain |
| CN202188066U (en) * | 2011-08-12 | 2012-04-11 | 吉林大学 | Double-pitch time share meshing chain plate with tooth chain |
-
2011
- 2011-08-12 CN CN2011102330799A patent/CN102287483B/en not_active Expired - Fee Related
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| CN102287483A (en) | 2011-12-21 |
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