CN107387730A - The herringbone bear and its processing method of combining structure - Google Patents
The herringbone bear and its processing method of combining structure Download PDFInfo
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- CN107387730A CN107387730A CN201710861788.9A CN201710861788A CN107387730A CN 107387730 A CN107387730 A CN 107387730A CN 201710861788 A CN201710861788 A CN 201710861788A CN 107387730 A CN107387730 A CN 107387730A
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- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/12—Toothed members; Worms with body or rim assembled out of detachable parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The present invention relates to a kind of herringbone bear of combining structure and its processing method, including having two helical gears of left-hand teeth and right-hand teeth respectively, at least two assembling pins assemble positioning in interference fit with the assembling pin-and-hole being correspondingly arranged on two helical gears to realize vertically, and close up two helical gear by fastener and post and fix connection.The assembling pin is three, and circumferentially decile is uniform on two helical gear spokes；The fastener is three axially disposed bolts, and circumferentially decile is uniform on described two helical gear spokes；The bolt passes through the through hole being correspondingly arranged on two helical gear spokes and attaching nut posts and fixes connection so that two helical gear to be closed up.Present invention utilizes traditional gear-hobbing machine, equipment cost are low；Do not cool down groove, reduce thickness, alleviate weight；High to tooth precision, operating, engagement effect are good, the effect of left-right rotary tooth uniform force；Effectively resetting and it can complete to reassemble and using effect is constant.
Description
Technical field
The invention belongs in transmission device with wheel technical field with teeth, and in particular to a kind of herringbone bear of combining structure
And its processing method.
Background technology
Traditional helical gear when in use, has to the cross force on axle, and to eliminate this axial force, a gear is made
Symmetrical helical gear in opposite direction, it is referred to as people because its symmetrical gear teeth appears as a herringbone to eliminate this axial force
Font gear.Herringbone bear has registration high, and axial load is small, and bearing capacity is high, the advantages of stable working, in heavy-duty machinery
Transmission system in be widely used.
The processing and manufacturing of existing herringbone bear, the form for thering is the bevel gear set by two finished products to be combined, but its group
There is the problem of coupling gear difficulty in closing operation, not high to tooth precision, cause normally to operate and engage bad, and left-right rotary tooth is equal
The problem of even stressed effect difference, it is impossible to give full play to the advantage of herringbone bear.Also there is the herringbone bear of integral structure, but two
Cooled down necessary to leave gear hobbing process between the effective gear teeth in side groove（Some is referred to as grinding undercut）, to meet that the gear hobbing of gear-hobbing machine adds
Industrial and commercial bank's range request, the herringbone bear of this structure is because the presence for groove of cooling down, thickness is thicker, heavier-weight, accordingly adds
The mechanical volume and weight of this structure herringbone bear is installed, because its integral type structural thickness is very big, the requirement to material
Also it is higher.With the use of numerical controlled machinery process equipment, now can also work in-process be done without cooling down in the heart the entirety of groove
The Milling Process of the herringbone bear of structure, but the corresponding machining center for needing more than five axles to link could be completed to process, to phase
Answer software and its requirement of numerical programming program high, the problem of staff training also be present, integrated cost is very high, its monoblock type
Requirement of the structure equally to material is also higher；And in use, many those skilled in the art think the Milling Process gear teeth
The engagement effect of not traditional Rolling-cut shear gear teeth is good, the problem of flank of tooth linear contact lay being present or even put contact, break-in period length
And the problem of fit clearance after break-in is big be present, need to further it further investigate.
The content of the invention
For the above-mentioned deficiency of prior art, the technical problem to be solved in the present invention is to provide a kind of herringbone of combining structure
Gear and its processing method, avoiding rolling cut integral type herringbone bear from being caused in the presence of groove of cooling down, thickness is big, weight is big, combined structure man
The problem of word gear mesh tooth precision is not high, and numerical control device processing integral type herringbone bear cost is too high, reaches and makes full use of
Traditional gear machining apparatus, and produce the effect for the herringbone bear that thickness is small, precision is high.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
The herringbone bear of combining structure, including there are two helical gears of left-hand teeth and right-hand teeth respectively, at least two assembling pin edges
Positioning axially is assembled to realize in interference fit with the assembling pin-and-hole being correspondingly arranged on two helical gears, and by fastener by described in
Two helical gears, which close up, posts and fixes connection.
Assembling pin-and-hole on herringbone bear of the present invention is with work, finger setting is then assembled, after being connected by fastener
It is process again by traditional gear-hobbing machine by rolling cut technique, greatly make use of existing resource, manufacturing cost is low；In structure
Cooled down necessary to eliminate the integral type herringbone bear of Rolling-cut shear groove, reduce thickness, reduce weight, broaden effective tooth
Face width；Assembling pin and fastener realize detachable and resetting assembling, are easy to clean and repair, repetitive positioning accuracy
Height, high to tooth precision, the operating and engagement after reassembling are all right.
Further improve above-mentioned technical proposal, the assembling pin is three, the circumferentially decile on two helical gear spokes
Uniformly；The fastener is three axially disposed bolts, and circumferentially decile is uniform on described two helical gear spokes,
The bolt is respectively provided on the extended line of assembling pin and herringbone bear circle center line connecting；The bolt passes through two helical gear spokes
On the through hole that is correspondingly arranged and attaching nut post and fix connection so that two helical gear to be closed up.
So, assembling pin and corresponding assembling pin-and-hole are three groups, the function with the failure of anti-combining structure, in some group
After filling pin-and-hole failure, positioning can also be effectively realized using remaining two groups of assembling pins and assembling pin-and-hole, avoids combining structure
Herringbone bear fails, while can remain three groups of assembling pins and assembling pin-and-hole again again with a new assembling pin-and-hole is made
State；Assembling pin and bolt are the uniform structure of decile, can keep dynamic balancing during gear operation；Bolt be located at closer to
The position of wheel rim, more meet the stressing conditions of gear operation engagement；Bolt, alignment pin meet spoke on same spoke line
Structure design demand, it is easy on spoke further set loss of weight through hole etc..
Further, two helical gear spoke thickness are less than the thickness of wheel rim；On the two helical gear spoke circumferentially
Decile is laid with some loss of weight through holes.
So, the thickness of spoke is less than wheel rim, and the bolt head and nut on spoke can be non-bulging in wheel after being fastenedly connected
The two sides of edge are the both ends of the surface of gear, avoid hooking, and also allow for installing the design of the plant equipment of this structure herringbone bear；Together
When and loss of weight through hole together, in the case where not reducing the strength of gear teeth, reduce the weight of gear；Loss of weight through hole decile is uniform, energy
Keep dynamic balancing during gear operation.
Further, the spiral angle of two helical gear left-hand teeths and right-hand teeth is equal；Two helical gear tooth forms are pasted along it
Conjunction face is symmetrical；The transverse tooth thickness of two helical gear left-hand teeths and right-hand teeth is equal.
So, when operating engagement, effect is more preferable in itself for the gear teeth.
Further, two helical gear wheel hubs are provided with the through hole and keyway for being used for coupling with rotating shaft.
So, be easy to herringbone bear and rotating shaft couple and the transmission of torque.
The present invention also relates to a kind of processing method of the herringbone bear of combinations thereof structure, comprises the following steps that：
1）Prepare two helical gears just base；
2）Prepare a backing plate of cooling down, the backing plate of cooling down is less than the circle of the root diameter of two helical gear teeth for diameter
Shape steel plate；
3）By the backing plate of cooling down between base at the beginning of described two helical gears, the company of posting and fixing is closed up by the fastener
Connect；
4）With the processing assembling pin-and-hole is made, connection procedure assembling pin is interference fitted in the assembling pin-and-hole；In two helical teeth
Just towards on two faces in outside, corresponding assembling pin-and-hole carve number with the fixed corresponding relation and tooth for assembling pin-and-hole wheel for base
Take turns the corresponding relation of end face；
5）The gear teeth are processed on gear-hobbing machine to form two helical gear；
6）The process assembling pin and the fastener are removed, backing plate of being cooled down described in dismounting；
7）Two helical gear is re-assemblied by corresponding assembling pin-and-hole and gear face, the interference fit connection assembling is sold,
Connect the bolt, two helical gears are closed up and post and fix connection to form the herringbone bear of the combining structure by nut.
Further improve above-mentioned technical proposal, step 1）Described in two helical gears just base is forge piece or cast member or machine
Add part or weldment；The first base of described two helical gears has completed the processing of wheel rim, spoke and wheel hub, has completed described three on spoke
The processing of through hole corresponding to individual bolt and the processing of the loss of weight through hole, the Excircle machining of wheel rim and adding for both ends of the surface are completed
Work；The cylindrical of wheel rim meets size tolerance requirements, and the both ends of the surface of wheel rim meet the depth of parallelism and flatness Geometrical Tolerance Principle, wheel rim
Cylindrical meet perpendicularity Geometrical Tolerance Principle with both ends of the surface；Step 2）Described in cool down backing plate be provided with and two helical gear pair
Through hole, three assembling pin-and-holes corresponding to the loss of weight through hole answered, three bolts, three assemblings set on the backing plate of cooling down
Diameter of the diameter of pin-and-hole slightly larger than three assembling pin-and-holes on two helical gear；Cool down backing plate upper and lower surface meet it is flat
Row degree and flatness Geometrical Tolerance Principle；The thickness of backing plate of cooling down meets the gear hobbing process range demands of gear-hobbing machine；Step 3）In
By three bolts corresponding to through hole and attaching nut by base at the beginning of described two helical gears and backing plate of cooling down
Close up and post and fix connection, while need to ensure that just the cylindrical axiality of wheel rim meets morpheme public affairs to described two helical gears on base
Difference requires；Step 5）Middle processing left-hand teeth and right-hand teeth use same group of differential change gear, add an idle wheel to protect when reverse
It is equal to demonstrate,prove spiral angle；After the gear teeth of the first base of the complete helical gear of rolling cut, if being drawn by line at the beginning of another helical gear on base
A dry symmetrical tooth form, to knife and to finely tune the accurate location of correction hobboing cutter to protect during the gear teeth of base at the beginning of another helical gear of rolling cut
Demonstrate,prove the symmetrical of tooth form；Calculated by hobboing cutter amount of feeding formula and control the amount of feeding to ensure that transverse tooth thickness is equal；Also include step 8）With
The wheel rim it is cylindrical on the basis of, the through hole and keyway processed on the wheel hub, ensure through hole on the wheel hub and the wheel
The cylindrical axiality of edge meets Geometrical Tolerance Principle.
Preferably, step 1）Described in two helical gears just base is that forge piece or cast member or machine add part or weldment；Institute
The processing that the first base of two helical gears has completed wheel rim, spoke and wheel hub is stated, has completed corresponding to three bolts to lead on spoke
The processing in hole and the processing of the loss of weight through hole, the processing of the through hole for being used to couple with rotating shaft on wheel hub is completed, it is complete
Into the Excircle machining of wheel rim and the processing of both ends of the surface；The cylindrical of through hole and wheel rim on wheel hub meets axiality Geometrical Tolerance Principle
And meet size tolerance requirements respectively, the both ends of the surface of wheel rim meet the depth of parallelism and flatness Geometrical Tolerance Principle, wheel rim it is cylindrical
Meet perpendicularity Geometrical Tolerance Principle with both ends of the surface；Step 2）Described in backing plate of cooling down be provided with and corresponding with two helical gear subtract
The corresponding through hole of weight through hole, through hole, three bolts for coupling with rotating shaft, three assembling pin-and-holes, the backing plate of cooling down
Upper setting is used for turning for the through hole, the diameters of three assembling pin-and-holes that couple with rotating shaft slightly larger than on two helical gear
The through hole of axle connection, three diameters for assembling pin-and-hole；The cool down upper and lower surface of backing plate meets the depth of parallelism and flatness form and position tolerance
It is required that；The thickness of backing plate of cooling down meets the gear hobbing process range demands of gear-hobbing machine；Step 3）In passed through by three bolts
Corresponding through hole and attaching nut by base at the beginning of described two helical gears and between backing plate of cooling down close up and post and fix connection, together
When need to ensure that the cylindrical axiality of through hole or wheel rim of described two helical gears just on base on wheel hub meets Geometrical Tolerance Principle；
Step 5）Middle processing left-hand teeth and right-hand teeth use same group of differential change gear, add an idle wheel to ensure helical angle when reverse
Spend equal；The complete helical gear of rolling cut is just after the gear teeth of base, by line to draw several on base at the beginning of another helical gear symmetrical
Tooth form, to knife and to finely tune the accurate location of correction hobboing cutter to ensure tooth form during the gear teeth of base at the beginning of another helical gear of rolling cut
Symmetrically；Calculated by hobboing cutter amount of feeding formula and control the amount of feeding to ensure that transverse tooth thickness is equal；Also include step 8）Process the key
Groove.
Compared with prior art, the present invention has the advantages that：
1st, the present invention takes full advantage of traditional gear-hobbing machine, and equipment cost is low.
2nd, the herringbone bear of combining structure of the invention is not cooled down groove, is reduced thickness, is alleviated weight；Give accordingly
Thickening the thickness of the gear teeth makes mesh tooth face wider, and the effect of engaged transmission is more preferable, intensity is higher creates precondition.
3rd, the herringbone bear of combining structure of the invention is high to tooth precision, can be effectively ensured that helical angle is equal, tooth form pair
Claim, the equal several crucial technology points of transverse tooth thickness, reach operating, engage effect it is good, the effect of left-right rotary tooth uniform force.
4th, the present invention forms for two independent gear combinations, corresponding lower, the combining structure of size requirement to material
Detachably it is easy to repair and cleans, while effectively resetting and can completes to reassemble and using effect is constant.
5th, the present invention except it is obvious take full advantage of traditional gear-hobbing machine in addition to, also utilize in gear manufacturing technology
A series of goods and materials, such as original casting mould, forging mold, processing tool, without putting into again again, greatly reduce
Cost, extend product line.
Brief description of the drawings
Fig. 1-specific embodiment of the invention herringbone bear structural representation；
Fig. 2-Fig. 1 top view；
Fig. 3-Fig. 2 A-A sectional views；
Wherein, 1- herringbone bears, 2- binding faces, the helical gears of 3- first, the helical gears of 4- second, 5- assembling pins, 6- bolts, 7- spiral shells
Mother, 11- wheel rims, 12- spokes, 13- wheel hubs, 14- loss of weight sector grooves, 15- through holes, 16- keyways.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1~3, the herringbone bear 1 of the combining structure of the specific embodiment of the invention, including symmetrically set along binding face 2
The first helical gear 3 and the second helical gear 4 put, i.e. two helical gears are respectively with spiral angle is equal, tooth form is symmetrical, transverse tooth thickness is equal
Left-hand teeth and right-hand teeth；Three circumferentially the uniform assembling pin 5 of decile vertically in interference fit with two helical gear spokes
To realize assembling positioning in the assembling pin-and-hole being correspondingly arranged on 12, and by three circumferentially the uniform bolt 6 of decile along axle
Two helical gear is closed up into the company of posting and fixing to through the through hole and attaching nut 7 being correspondingly arranged on two helical gear spokes
Connect；The bolt 6 is respectively provided on the extended line of assembling pin 5 and the circle center line connecting of herringbone bear 1；The two helical gear thickness of spoke 12
Less than the thickness of wheel rim 11, the thickness of wheel hub 13 is equal with the thickness of wheel rim 11, circumferentially decile on two helical gear spokes 12
It is laid with three loss of weight sector grooves 14；On two helical gear spokes 12 after connecting bolt 6 and nut 7, the both ends of the surface of bolt 6
Without departing from the both ends of the surface of herringbone bear 1；The through hole 15 and keyway for coupling with rotating shaft are additionally provided with two helical gear wheel hubs 13
16。
The processing method that the herringbone bear 1 of combinations thereof structure is introduced with machine plus part comprises the following steps that：
1）Prepare two helical gears just base；
Wherein, the processing of the first base of helical gear comprises the following steps that：
1.1）Lower round steel stick material；
1.2）The end face of turnery processing wheel rim 11, spoke 12 and wheel hub 13, wheel rim 11 it is cylindrical, be used on wheel hub 13 and rotating shaft
The through hole 15 of connection；Through hole 15 on wheel hub 13 meets axiality Geometrical Tolerance Principle and meets chi respectively with the cylindrical of wheel rim 11
Very little tolerance；The cylindrical and machined wheel rim 11 and the end face of wheel hub 13 of wheel rim 11 meet perpendicularity Geometrical Tolerance Principle；
1.3）The other end of turn-over turnery processing wheel rim 11, spoke 12 and wheel hub 13；
1.4）Through hole corresponding to three bolts 6 and the loss of weight sector groove 14 in the processing of spoke 12；
1.5）With step 1.2）On the basis of the wheel rim 11 of middle turning and the end face of wheel hub 13, precision grinding step 1.3）The wheel rim of middle turning
11 and the end face of wheel hub 13；The both ends of the surface of wheel rim 11 and wheel hub 13 meet the depth of parallelism and flatness Geometrical Tolerance Principle, and grinding adds
The face of work meets perpendicularity Geometrical Tolerance Principle with the cylindrical of wheel rim 11；So, maloperation during combination can be avoided；
1.6）With step 1.5）On the basis of the face of middle grinding, other end is ground to improve roughness；So, both ends of the surface are made
State consistency, further avoid combination when maloperation；
2）Prepare a backing plate of cooling down, the backing plate of cooling down is less than the circle of the root diameter of two helical gear teeth for diameter
Shape steel plate；
Wherein, the processing of backing plate of cooling down comprises the following steps that：
2.1）Blanking；
2.2）Processing excircles, diameter are less than the root diameter of two helical gear teeth；
2.3）Processing loss of weight sector groove corresponding with two helical gear, the through hole for coupling with rotating shaft, three spiral shells
Through hole, three assembling pin-and-holes corresponding to bolt 6；Cool down process on backing plate for the through hole, the three assembling pin-and-holes that couple with rotating shaft
Diameter slightly larger than 15, three diameters for assembling pin-and-hole of the through hole for being used to couple with rotating shaft on two helical gear, be
Hole；
2.4）It is ground upper and lower surface；Upper and lower surface meets the depth of parallelism and flatness Geometrical Tolerance Principle, and thickness meets gear-hobbing machine
Gear hobbing process range demands；
3）By the backing plate of cooling down between base at the beginning of described two helical gears, with special frock, ensure described two helical teeth
Just the cylindrical axiality of the through hole 15 on base on wheel hub 13 or wheel rim 11 meets Geometrical Tolerance Principle to wheel, passes through three spiral shells
Bolt 6 corresponding to through hole and attaching nut 7 by base at the beginning of described two helical gears and backing plate of cooling down close up and be bonded and solid
Fixed connection；
4）With processing three assemblings pin-and-hole is made, connection procedure assembling pin is interference fitted in the assembling pin-and-hole；At two
Just towards on two faces in outside, corresponding assembling pin-and-hole carve number with the fixed corresponding relation for assembling pin-and-hole helical gear for base
With the corresponding relation of gear face；
5）The gear teeth are processed on gear-hobbing machine to form two helical gear；It is differential using same group in processing left-hand teeth and right-hand teeth
Change gear, an idle wheel is added to ensure that spiral angle is equal when reverse；The complete helical gear of rolling cut just after the gear teeth of base, passes through
Line several symmetrical tooth forms are being drawn at the beginning of another helical gear on base, so as at the beginning of another helical gear of rolling cut during the gear teeth of base to knife
And the accurate location of correction hobboing cutter is finely tuned to ensure the symmetrical of tooth form；Calculated by hobboing cutter amount of feeding formula and control the amount of feeding with
Ensure that transverse tooth thickness is equal；
6）The process assembling pin and three bolts 6 are removed, backing plate of being cooled down described in dismounting；
7）Two helical gear, interference fit connection three assemblings are re-assemblied by corresponding assembling pin-and-hole and gear face
Pin 5, connection three bolts 6, nut 7, which close up two helical gears, posts and fixes connection to form the combining structure
Herringbone bear 1.
8）Wire cutting or slotting machine process the keyway 16.
During implementation, further, helical gear can use forge piece or cast member or weldment, also include material in process
Expect the heat treatment after blanking, the high-frequency quenching after gear teeth processing etc..Those skilled in the art enter technical process during above-mentioned implementation
Capable improving or improve should be regarded as falling into the scope of the present invention.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (8)
1. the herringbone bear of combining structure, including there are two helical gears of left-hand teeth and right-hand teeth respectively, it is characterised in that：At least
Two assembling pins assemble positioning in interference fit with the assembling pin-and-hole being correspondingly arranged on two helical gears to realize vertically, and pass through
Fastener, which closes up two helical gear, posts and fixes connection.
2. the herringbone bear of combining structure according to claim 1, it is characterised in that：The assembling pin is three, oblique two
Circumferentially decile is uniform on the spoke of gear；The fastener is three axially disposed bolts, and in two helical gear
Spoke on circumferentially decile it is uniform, the bolt be respectively provided at assembling pin with the extended line of herringbone bear circle center line connecting；Institute
Bolt is stated through the through hole and attaching nut being correspondingly arranged on two helical gear spokes so that two helical gear is closed up into fitting simultaneously
It is fixedly connected.
3. the herringbone bear of combining structure according to claim 2, it is characterised in that：Two helical gear spoke thickness are less than wheel
The thickness of edge；Circumferentially decile is laid with some loss of weight through holes on the two helical gear spoke.
4. the herringbone bear of combining structure according to claim 3, it is characterised in that：Two helical gear left-hand teeths and right-hand teeth
Spiral angle it is equal；Two helical gear tooth forms are symmetrical along its binding face；The transverse tooth thickness phase of two helical gear left-hand teeths and right-hand teeth
Deng.
5. the herringbone bear of combining structure according to claim 4, it is characterised in that：Two helical gear wheel hubs, which are provided with, to be used for
The through hole and keyway coupled with rotating shaft.
6. the processing method of the herringbone bear of combining structure, it is characterised in that：The herringbone bear of the combining structure of this method processing
For the herringbone bear of any combining structure of claim 2~5, comprise the following steps that：
1）Prepare two helical gears just base；
2）Prepare a backing plate of cooling down, the backing plate of cooling down is less than the circle of the root diameter of two helical gear teeth for diameter
Shape steel plate；
3）By the backing plate of cooling down between base at the beginning of described two helical gears, the company of posting and fixing is closed up by the fastener
Connect；
4）With the processing assembling pin-and-hole is made, connection procedure assembling pin is interference fitted in the assembling pin-and-hole；In two helical teeth
Just towards on two faces in outside, corresponding assembling pin-and-hole carve number with the fixed corresponding relation and tooth for assembling pin-and-hole wheel for base
Take turns the corresponding relation of end face；
5）The gear teeth are processed on gear-hobbing machine to form two helical gear；
6）The process assembling pin and the fastener are removed, backing plate of being cooled down described in dismounting；
7）Two helical gear is re-assemblied by corresponding assembling pin-and-hole and gear face, the interference fit connection assembling is sold,
Connect the bolt, two helical gears are closed up and post and fix connection to form the herringbone bear of the combining structure by nut.
7. the processing method of the herringbone bear of combining structure according to claim 6, it is characterised in that：Step 1）Described in two
Just base is that forge piece or cast member or machine add part or weldment to individual helical gear；Just base has completed wheel rim, wheel to described two helical gears
The processing of spoke and wheel hub, the processing of through hole corresponding to three bolts and the processing of the loss of weight through hole on spoke are completed,
The processing of the through hole for being used to couple with rotating shaft on wheel hub has been completed, has completed the Excircle machining of wheel rim and adding for both ends of the surface
Work；The cylindrical of through hole and wheel rim on wheel hub meets axiality Geometrical Tolerance Principle and meets size tolerance requirements, wheel rim respectively
Both ends of the surface meet the depth of parallelism and flatness Geometrical Tolerance Principle, the cylindrical and both ends of the surface of wheel rim meet that perpendicularity form and position tolerance will
Ask；Step 2）Described in cool down backing plate provided with loss of weight through hole corresponding with two helical gear, for couple with rotating shaft through hole,
Through hole corresponding to three bolts, three assembling pin-and-holes, set on the backing plate of cooling down for couple with rotating shaft through hole,
The diameters of three assembling pin-and-holes assemble the straight of pin-and-hole slightly larger than the through hole for being used to couple with rotating shaft on two helical gear, three
Footpath；The cool down upper and lower surface of backing plate meets the depth of parallelism and flatness Geometrical Tolerance Principle；The thickness of backing plate of cooling down meets gear-hobbing machine
Gear hobbing process range demands；Step 3）In corresponding through hole is passed through by three bolts and attaching nut will be described two
Helical gear just base and between backing plate of cooling down close up and post and fix connection, while taken turns on base at the beginning of described two helical gears need to be ensured
The cylindrical axiality of through hole or wheel rim on hub meets Geometrical Tolerance Principle；Step 5）Middle processing left-hand teeth and right-hand teeth use
Same group of differential change gear, an idle wheel is added to ensure that spiral angle is equal when reverse；The first base of the complete helical gear of rolling cut
After the gear teeth, several symmetrical tooth forms are being drawn by line on base at the beginning of another helical gear, so as to base at the beginning of another helical gear of rolling cut
The gear teeth when to knife and finely tune the accurate location of correction hobboing cutter to ensure the symmetrical of tooth form；Calculated simultaneously by hobboing cutter amount of feeding formula
The amount of feeding is controlled to ensure that transverse tooth thickness is equal；Also include step 8）Process the keyway.
8. the processing method of the herringbone bear of combining structure according to claim 6, it is characterised in that：Step 1）Described in two
Just base is that forge piece or cast member or machine add part or weldment to individual helical gear；Just base has completed wheel rim, wheel to described two helical gears
The processing of spoke and wheel hub, the processing of through hole corresponding to three bolts and the processing of the loss of weight through hole on spoke are completed,
The Excircle machining of wheel rim and the processing of both ends of the surface are completed；The cylindrical of wheel rim meets size tolerance requirements, and the both ends of the surface of wheel rim expire
The sufficient depth of parallelism and flatness Geometrical Tolerance Principle, the cylindrical and both ends of the surface of wheel rim meet perpendicularity Geometrical Tolerance Principle；Step 2）
Described in cool down backing plate provided with loss of weight through hole corresponding with two helical gear, through hole, three groups corresponding to three bolts
Pin-and-hole is filled, the diameter of the three assembling pin-and-holes set on the backing plate of cooling down is slightly larger than three assembling pins on two helical gear
The diameter in hole；The cool down upper and lower surface of backing plate meets the depth of parallelism and flatness Geometrical Tolerance Principle；Cool down backing plate thickness meet
The gear hobbing process range demands of gear-hobbing machine；Step 3）In corresponding through hole passed through by three bolts and attaching nut is by institute
State two helical gears just base and between backing plate of cooling down close up and post and fix connection, while at the beginning of described two helical gears need to be ensured
The cylindrical axiality of wheel rim meets Geometrical Tolerance Principle on base；Step 5）Middle processing left-hand teeth and right-hand teeth are poor using same group
Dynamic change gear, adds an idle wheel to ensure that spiral angle is equal when reverse；The complete helical gear of rolling cut just after the gear teeth of base, leads to
Cross line and drawing several symmetrical tooth forms at the beginning of another helical gear on base, so as at the beginning of another helical gear of rolling cut during the gear teeth of base pair
Knife simultaneously finely tunes the accurate location of correction hobboing cutter to ensure the symmetrical of tooth form；Calculated by hobboing cutter amount of feeding formula and control the amount of feeding
To ensure that transverse tooth thickness is equal；Also include step 8）By the wheel rim it is cylindrical on the basis of, the through hole and keyway processed on the wheel hub,
Ensure that the cylindrical axiality of through hole and the wheel rim on the wheel hub meets Geometrical Tolerance Principle.
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| CN111022610A (en) * | 2019-11-22 | 2020-04-17 | 湖南南方宇航高精传动有限公司 | Process for combining left-handed inner gear ring and right-handed inner gear ring into high-precision herringbone gear |
| CN114208482A (en) * | 2021-12-10 | 2022-03-22 | 格力博(江苏)股份有限公司 | Grass cutter |
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| CN114208482A (en) * | 2021-12-10 | 2022-03-22 | 格力博(江苏)股份有限公司 | Grass cutter |
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| CN107387730B (en) | 2023-09-12 |
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