CN1280556C - Gear transmission apparatus using flexible belts as engagement medium - Google Patents
Gear transmission apparatus using flexible belts as engagement medium Download PDFInfo
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- CN1280556C CN1280556C CN 03135803 CN03135803A CN1280556C CN 1280556 C CN1280556 C CN 1280556C CN 03135803 CN03135803 CN 03135803 CN 03135803 A CN03135803 A CN 03135803A CN 1280556 C CN1280556 C CN 1280556C
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Abstract
The present invention provides a gear transmission mechanism using flexible belts as engagement media, which relates to a gear transmission mechanism. A gear which is formed in the mode that a metal gear framework and a macromolecular oil containing alloy material coating layer which is composite with or stuck on two lateral faces of the metal gear framework in the prior art, has the advantages of good self-lubricating performance, etc., and has the disadvantages of low bearing capacity, low engagement efficiency, easily peeling the framework and the coating layer, high manufacturing cost, etc. That a flexible material is covered on a worm wheel transmission pair of a single enveloping ring surface of a plane tooth on a worm wheel tooth surface still has the disadvantages. Then, the present invention provides the gear transmission mechanism using flexible belts as engagement media, which relates to a gear transmission mechanism. A movable closed flexible belt (3) is sheathed outside of a gear tooth of one gear, and baffle rings (5) which are arranged on both sides of the gear which is provided with the flexible belt (3) are connected with the gear by a screw (7). The present invention has the characteristics of reducing tooth surface friction, reducing noise, realization of oil lubrication and water lubrication, no environmental pollution, elasticity variation of the flexible belt to automatically adjust errors of the shape and the position, replacement of the belt without the replacement of the gear, reducing cost, etc.
Description
One, technical field
The present invention relates to a kind of gear drive, especially is the gear drive of engagement medium with the flexibility band.
Two, background technique
Gear is a kind of mechanical transmission basic part of being used widely in industry, agricultural, national defence, science and technology and other each economic department.To present gear industry, to divide from the angle of material, gear is divided into metal gear and nonetallic gear two big classes.The metallic material gear pair belongs to the higher pair of " high-modulus (metal)--high-modulus (metal) ", the outstanding advantage that have at a high speed, bearing capacity is big, but have vibration and noise, it can only be lubricated with oil lubricant, thereby easy befouling environment; And the hardened face gear roll flute that need quench, complex process; The machining accuracy height that requires, the cost of production height.The nonetallic gear pair belongs to low modulus (nonmetal)--middle low modulus (nonmetal) in " " " higher pair; have advantages such as in light weight, selflubricating, vibration and noise reducing, corrosion-resistant, good manufacturability; but intensity is low, poor thermal conductivity, thermal distortion are big; and be subject to the influence of temperature, humidity and load mode etc.; the little occasion that generally is used to load, can't widespread usage.This shows that the conventional gears driving mechanism all is the direct and driven gear engagements of driving gear, do not have the intermediate medium of solid between gear and the gear.
Chinese patent " a kind of selflubricating gear " (patent No.: ZL00210874.7), a kind of gear skeleton that adopts metal and compound or stick on the gear that the macromolecule oil-containing alloy material covering on its bi-side constitutes has been proposed, have advantages such as self-lubricating property is good, but this gear has the following disadvantages: though 1, transmission has self-lubricating function, but the engagement driving that belongs to a pair of " nonmetal-nonmetal " gear driving pair, with respect to common fluid lubrication metal gear transmission, its bearing capacity is low, and meshing efficiency is low.2, the easy generation peeled off between skeleton and the covering, influences gear life.3, compound two molds of need making of skeleton and covering, and the gear of the different modulus and the number of teeth need be made different moulds, make manufacturing cost height, almost can't see the large and medium-sized gear of jobbing work use may.4, gear skeleton and covering are to be combined with each other by resin sandwich, thereby after the gear failure, denticle is difficult for utilizing again, Ruo Yinmosheben, then very waste.
Chinese patent " is the flat-teeth single-enveloping ring-surface worm gear pair on worm-gear tooth surface with the flexible material " (patent No.: ZL95229090.1), proposed a kind ofly to cover flat-teeth single-enveloping ring-surface worm drive pair on the worm gear flank of tooth with flexible material, belong to " metal--nonmetal " friction pair, improve worm geared fluid lubrication, had the friction factor that reduces worm gear pair, the advantage that improves mechanical efficiency.But flexible material combines with the worm gear flank of tooth and exists and the similar shortcoming of aforementioned patent " a kind of selflubricating gear ", and does not relate to gear pair transmission problem.
Three, summary of the invention
The purpose of this invention is to provide a kind of is the gear drive of engagement medium with the flexibility band.
Technological scheme that purpose of the present invention adopts is, gear A conjugation engaging gear B, and the flexibility band that is closed shape of the wheel gear cover dress activity of one of them gear is equipped with the baffle ring that the gear both sides of flexible band are provided with and is connected with screw with gear.
The present invention, its flexible band is sleeved on one of them gear B of external gear pump.
The present invention, its flexible band is sleeved on the gear B of inside engaged gear.
The present invention compared with prior art has following advantage:
Owing to embedded flexible band between two mesh tooth faces, flexible band separates two flank of tooth that are meshed, the flexible strip material is macromolecular material or other composite material, and this makes " high-modulus (gear)--high-modulus (gear) " friction pair be converted into " high-modulus (gear)--low modulus (flexible band) " friction pair.When gear rotates, pressure between the two makes flexible band produce compressive strain, hertz contact width when this moment, contact width was much larger than high-modulus, and near the contact area, form a good key groove, help forming liquid friction, reduce flank of tooth stress thereby play, reduce the effect that rubs and raise the efficiency.
Among the present invention, the flexible strip material is macromolecular material or its composite material, has viscoelasticity, can absorption portion kinetic energy, suppress impact shock fast, weakened gear teeth vibration wave propagation simultaneously, especially dither wave propagation, thereby can reduce noise, in the working life of prolonged mechanical equipment, help environmental protection.
Among the present invention,, belong to " metal-nonmetal " friction because lubricating condition is good, to oiling agent require lowly, can as water lubriucated bearing, be lubricated by water, save oily resource, non-environmental-pollution is realized the green oilgear transmission that a kind of cost is minimum.
Among the present invention, the resiliently deformable of the flexible band of high elasticity low modulus can reduce because the receptance that designs, makes and install the morpheme error effect that causes, reduce manufacturing installation precision, surface finishment and the hardness requirement of gear greatly, reduce the processing request and the manufacture cost of gear, have good economic benefits.
Relative metal-toothed wheel body, the intensity of flexible band is lower, inevitable at first damage, thereby can be the extremely flexible band of the failover of gear, as long as broken teeth does not take place gear, common tape swapping do not need gear changing, plays the effect of protecting gear, prolonged the life-span of gear greatly.For being convenient for changing flexible band, the endoporus of baffle ring is sufficiently large, only needs the dismounting baffle ring during tape swapping, and is efficient and convenient.
Four, description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is a kind of embodiment's of an external gear pump transmission of the present invention three-dimensional sectional structure schematic representation;
Fig. 2 is the another kind of embodiment's of an inside engaged gear transmission of the present invention three-dimensional portion TV structure schematic representation;
Fig. 3 is specific embodiment working state figure of the present invention;
Fig. 4 is the transmission efficiency plotted curve;
Fig. 5 is noise curve figure;
Fig. 6 is involute gear high speed shaft vibration acceleration time-domain curve figure;
Fig. 7 is a belt engagement medium high-speed gear shaft vibration acceleration time domain plotted curve;
Fig. 8 is involute gear high speed shaft vibration acceleration frequency curve figure;
Fig. 9 is belt engagement medium high speed shaft vibration acceleration frequency curve figure.
Among the figure: the flexible band of 1-gear A 2-gear B 3-4-gear shaft 5-baffle ring 6-coupling 7-screw
Five, embodiment
As shown in Figure 1, there is gear A 1 conjugation of coupling 6 and gear shaft 4 to be engaged with the gear B 2 of coupling 6 and gear shaft 4, the flexibility that is closed shape of the wheel gear cover dress activity of tooth axle B2 is with 3, flexibility is housed is connected with gear B 2 usefulness screws 7 with the baffle ring 5 that 3 gear B 2 both sides are provided with.
Fig. 2, gear A 1 conjugation is engaged with the gear B 2 of coupling 6 and gear shaft 4, and the flexibility that is closed shape of the wheel gear cover dress activity of gear B 2 is with 3, flexibility is housed is connected with gear B 2 usefulness screws 7 with the baffle ring 5 that 3 gear B 2 both sides are provided with.
Among above-mentioned Fig. 1, Fig. 2: flexibility is with 3 to be closed circular, in operation process, is with 3 to embed gradually between two mesh tooth faces successively flexibility by the gear A 1 of the flexible band of suit not.The baffle ring 5 that a slice can be for convenience detach respectively is installed being with the bi-side of flexibility, in case flexible band comes off with 3 gear B 2.
The present invention is owing to adopt flexibility to be with 3 as the gear engagement medium, thereby can realize water lubrication, and environmental pollution is little, and flank of tooth stress reduces, and noise reduces, and friction reduces, and has prolonged working life, has reduced manufacture cost, and flexibility be with 3 change convenient and swift.
Fig. 3 is a specific embodiment working state figure of the present invention.Basic parameter is: centre distance α=200mm, velocity ratio i=2, gear tooth number Z
1=19, Z
2=38, modulus m=7mm, pressure angle α=20 °, medium flexible strip material is that glass fibre strengthens nitrile butadiene rubber, thickness t=1.7mm; Oiling agent is gear oil or water.
The inventor has carried out experimental research to " gear transmission of belt medium " that proposed: utilize a ready-made common gear reducer, after it is carried out testing experiment with the gear tooth attenuate, and the thickness of reduction in tooth thickness and medium band is adapted, on gearwheel, overlap the macromolecular material endless belt of a suitable length again, and on the gear test stand, having carried out water, oil lubrication general performance and dynamic performance test (referring to Fig. 3), result such as Fig. 4 are to shown in Figure 9.The efficiency curve of Fig. 4 shows that the efficient of water lubrication and oil lubrication differs very little, if deduction is because water lubrication to the adverse effect of bearing, can think that then both are almost equal; The noise curve of Fig. 5 shows that the noise of belt medium gear is than low 6 decibels approximately of corresponding common involute gear noises; Fig. 6, Fig. 8 are the vibration acceleration time domain and the frequency curve of ordinary gear transmission; Fig. 7, Fig. 9 are gear-driven vibration acceleration time domain of belt medium and frequency curve, both contrast obviously and show, the gear-driven vibration of belt medium is little, spectral performance good, and reflects that it has become extremely insensitive to the short-period error of gear (gear teeth gemoetric error).
Claims (3)
1, a kind of is the gear drive of engagement medium with the flexibility band, gear A (1) conjugation engaging gear B (2), the flexibility band (3) that is closed shape that it is characterized in that the wheel gear cover dress activity of one of them gear, the baffle ring (5) that the gear both sides setting of flexible band (3) is housed is connected with screw (7) with gear.
2, according to claim 1 a kind of serve as the gear drive of engagement medium with the flexibility band, it is characterized in that flexible band (3) is sleeved on one of them gear B (2) of external gear pump.
3, according to claim 1 a kind of serve as the gear drive of engagement medium with the flexibility band, it is characterized in that flexible band (3) is sleeved on the gear B (2) of inside engaged gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135803 CN1280556C (en) | 2003-09-08 | 2003-09-08 | Gear transmission apparatus using flexible belts as engagement medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135803 CN1280556C (en) | 2003-09-08 | 2003-09-08 | Gear transmission apparatus using flexible belts as engagement medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523248A CN1523248A (en) | 2004-08-25 |
| CN1280556C true CN1280556C (en) | 2006-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03135803 Expired - Fee Related CN1280556C (en) | 2003-09-08 | 2003-09-08 | Gear transmission apparatus using flexible belts as engagement medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1280556C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763247A (en) * | 2017-02-20 | 2017-05-31 | 陈婷 | A kind of driving drum herringbone gear lock connection device |
| CN108591367B (en) * | 2018-05-08 | 2020-08-28 | 海门茂发美术图案设计有限公司 | Gear transmission mechanism capable of synchronously preventing gear from being driven |
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2003
- 2003-09-08 CN CN 03135803 patent/CN1280556C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1523248A (en) | 2004-08-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20061018 Termination date: 20091009 |