CN206972867U - Agricultural machinery duplicate gear - Google Patents

Abstract

The utility model provides a kind of agricultural machinery duplicate gear, including gear shaft, gear wheel and little gear, and gear wheel is helical gears, and each helical teeth top surface and the both sides flank profil curved surface junction of helical gears are chamfering；Little gear is heterodont roller gear, and heterodont crest top land outboard end width is more than medial extremity width, and heterodont lateral surface opposed gear axial plane is raised pyramidal structure, and heterodont pyramidal structure is 105 ° to 115 ° along gear shaft axial direction two sides angle；Gear shaft stage casing has connection gear wheel and the excessive shaft shoulder of little gear, and excessive shaft shoulder periphery is the arcwall face of indent, and gear wheel, little gear and gear shaft outer surface are respectively provided with carbo-nitriding process layer.The utility model lubrication is good, and little gear uses helical teeth form using the different heterodont of both ends width, gear wheel, duplicate gear engagement is stable, when outside pitch is larger, is not susceptible to engage bad and releases, extend the service intervals time, reduce agricultural machinery maintenance cost.

Description

Agricultural machinery duplicate gear

Technical field

It the utility model is related to component of machine and manufacture field, more particularly to a kind of agricultural machinery duplicate gear.

Background technology

Duplicate gear is the gear for being made of one two coaxial and separated by a distance gears.Used in field field Agricultural machinery, use environment typically more jolts, inside agricultural machinery each transmission parts in long-term use, easily jolted by the external world or Person's vibration effect, the internal connection transmission parts engagement of generation is bad, or even generation part comes off, and causes shutdown situation to occur, tears open Machine maintenance difficult.Therefore, in the agricultural machinery manufacturing, it is necessary to for this case, connection transmission parts are made and accordingly changed Kind, reasonable in design gear structure, improve the stability of transmission.

Utility model content

The technical problems to be solved in the utility model is：In order to overcome deficiency in the prior art, the utility model provides It is a kind of reasonable in design, during can effectively reducing agricultural machinery use, gear because jolt or vibrate cause to engage it is bad, the feelings such as release Condition, effectively reduce the agricultural machinery duplicate gear of agricultural machinery maintenance cost.

Technical scheme is used by the utility model solves its technical problem：A kind of agricultural machinery duplicate gear, including by The gear wheel and little gear of gear axis connection, gear wheel are helical gears, each helical teeth top of the helical gears Face and both sides flank profil curved surface junction are chamfering；Described little gear is heterodont roller gear, outside the heterodont crest top land Side width is more than medial extremity width, and heterodont lateral surface opposed gear axial plane is raised pyramidal structure, the abnormal shape Tip surface wimble structure is 105 ° to 115 ° along gear shaft axial direction two sides angle；The gear shaft stage casing has connection gear wheel and small The excessive shaft shoulder of gear, the excessively shaft shoulder periphery are the arcwall face of indent, and gear wheel, little gear and gear shaft outer surface are equal With carbo-nitriding process layer.The little gear designed using heterodont, in pitch, due to heterodont both ends width not Together, and crest top land outside width is more than inboard width, when duplicate gear rotates and agricultural machinery vibrates, along gear shaft axial direction Vibration can be offset by heterodont clamping, be not susceptible to get rid of situation that is de- and releasing landing, can effectively be reduced the situation of shutdown maintenance. At least two recessed oil grooves are distributed with uniform intervals on little gear outer face.

Further, for oil groove depth in 0.3mm to 0.8mm, oil groove bottom surface is cambered surface.At work, oil groove can be gear Lubricating oil is supplied, lubrication is improved, avoids excessive wear.

Further, each helical teeth top surface of helical gears and both sides flank profil curved surface junction are 45 ° of chamferings.

Further, pyramidal structure side peak intersection is chamfering, and the pyramidal structure of chamfer design can be easy to and other Travelling gear engages.

Preferably, heterodont pyramidal structure is 110 ° along gear shaft axial direction two sides angle.

Further, the arc radius surface of the transition shaft shoulder is preferably 5mm to 8mm.

Further, carbo-nitriding process layer effective case depth is 0.45mm to 0.7mm, case hardness be 58HRC extremely 64HRC。

The beneficial effects of the utility model are agricultural machinery duplicate gears provided by the utility model, and lubrication is good, little gear Using the different heterodont of both ends width, gear wheel uses helical teeth form, and during engaged transmission, duplicate gear engagement is stable, outside When portion's pitch is larger, it is not susceptible to engage bad and releases, extend the service intervals time, reduce agricultural machinery maintenance cost.

Brief description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is the structural representation of the utility model optimum embodiment.

Fig. 2 is the enlarged diagram at A in Fig. 1.

Fig. 3 is the enlarged diagram at B in Fig. 1.

Fig. 4 is the sectional view at C-C in Fig. 3.

Fig. 5 be in Fig. 3 D to partial schematic diagram.

1, gear shaft 2, gear wheel 3, little gear 4, heterodont 5, pyramidal structure 6, the excessive shaft shoulder 7, arc in figure Face 8, oil groove.

Embodiment

The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram, Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.

A kind of agricultural machinery duplicate gear as shown in Figures 1 to 5, is the utility model optimum embodiment, including by gear The gear wheel 2 and little gear 3 that axle 1 connects.Gear wheel 2 is helical gears, each helical teeth top surface of helical gears with Both sides flank profil curved surface junction is 45 ° of chamferings.

In order to improve duplicate gear case hardness, gear mechanism intensity is improved, extends service life of gear, it is gear wheel 2, small Gear 3 and the outer surface of gear shaft 1 are respectively provided with carbo-nitriding process layer.Carbo-nitriding process layer effective case depth be 0.45mm extremely 0.7mm, case hardness are 58HRC to 64HRC.

At least two recessed oil grooves 8 are distributed with uniform intervals on the outer face of little gear 3, and the depth of oil groove 8 exists 0.5mm, the bottom surface of oil groove 8 are cambered surface.At work, oil groove 8 can be that gear supplies lubricating oil, improve lubrication, avoid excessive wear.

Little gear 3 is heterodont roller gear, and the crest top land outboard end width of heterodont 4 is more than medial extremity width.Work as duplex Pinion rotation and when agricultural machinery vibrates, can be offset along the vibration of the axial direction of gear shaft 1 by the clamping of heterodont 4.And the outside of heterodont 4 The plane of face opposed gear axle 1 is raised pyramidal structure 5, and the pyramidal structure 5 of heterodont 4 is excellent along the axial two sides angle of gear shaft 1 Elect 110 ° as.The side peak intersection of pyramidal structure 5 is chamfering, and the pyramidal structure 5 of chamfer design can be easy to and other driving cogs Wheel engagement.

The stage casing of gear shaft 1 has connection gear wheel 2 and the excessive shaft shoulder 6 of little gear 3, and the excessive periphery of the shaft shoulder 6 is indent Arcwall face 7.The radius of arcwall face 7 of the transition shaft shoulder is preferably 6mm.The design of the excessive shaft shoulder 6 can facilitate duplicate gear whole Body carries out machining.

The agricultural machinery duplicate gear being so designed that, oil groove 8 provide good lubrication.Little gear 3 uses both ends width not With heterodont 4, gear wheel 2 uses helical teeth form, and during engaged transmission, duplicate gear engagement is stable, outside pitch compared with When big, heterodont 4 engages well, is not susceptible to engage bad and releases, and extends the service intervals time, reduce agricultural machinery safeguard into This.

Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people Member can carry out various changes and amendments in the range of without departing from this item utility model technological thought completely.This item is real The content being not limited to new technical scope on specification, it is necessary to which its technology is determined according to right Property scope.

Claims (7)

1. a kind of agricultural machinery duplicate gear, including existed by the gear wheel (2) and little gear (3), its feature of gear shaft (1) connection In：Described gear wheel (2) is helical gears, each helical teeth top surface and the both sides flank profil curved surface of the helical gears Junction is chamfering；Described little gear (3) is heterodont roller gear, and heterodont (4) the crest top land outboard end width is big In medial extremity width, and heterodont (4) lateral surface opposed gear axle (1) plane is raised pyramidal structure (5), the heterodont (4) pyramidal structure (5) is 105 ° to 115 ° along the axial two sides angle of gear shaft (1)；Gear shaft (1) stage casing has connection The excessive shaft shoulder (6) of gear wheel (2) and little gear (3), the described excessively shaft shoulder (6) periphery are the arcwall face (7) of indent；It is described Gear wheel (2), little gear (3) and gear shaft (1) outer surface be respectively provided with carbo-nitriding process layer, on little gear (3) outer face At least two recessed oil grooves (8) are distributed with uniform intervals.

2. agricultural machinery duplicate gear as claimed in claim 1, oil groove (8) depth is at 0.3mm to 0.8mm, oil groove (8) bottom Face is cambered surface.

3. agricultural machinery duplicate gear as claimed in claim 1, it is characterised in that：Each helical teeth of described helical gears Top surface and both sides flank profil curved surface junction are 45 ° of chamferings.

4. agricultural machinery duplicate gear as claimed in claim 1, it is characterised in that：Described pyramidal structure (5) side peak phase It is chamfering at friendship.

5. agricultural machinery duplicate gear as claimed in claim 1, it is characterised in that：Heterodont (4) pyramidal structure (5) is along tooth The axial two sides angle of wheel shaft (1) is 110 °.

6. agricultural machinery duplicate gear as claimed in claim 1, its spy are：The arcwall face (7) of the described excessive shaft shoulder (6) half Footpath is 5mm to 8mm.

7. agricultural machinery duplicate gear as claimed in claim 1, it is characterised in that：Described carbo-nitriding process layer is effectively hardened Depth is 0.45mm to 0.7mm, and case hardness is 58HRC to 64HRC.