CN105840768A

CN105840768A - Gear

Info

Publication number: CN105840768A
Application number: CN201510020604.7A
Authority: CN
Inventors: 李孜; 弗朗茨-约瑟夫·吉勒斯贝格尔; 安德烈亚斯·格鲁贝尔
Original assignee: Miba Precision Components China Co Ltd
Current assignee: Miba Precision Components China Co Ltd
Priority date: 2015-01-15
Filing date: 2015-01-15
Publication date: 2016-08-10

Abstract

The invention relates to a gear (1). The gear (1) comprises a gear body (2) with tooth forms (3) formed by a series of teeth (4), wherein tooth spaces (5) are formed between the teeth (4), and the ratio of bmax/((dk-df)/2) is at least 1 to 2, wherein bmax is the maximum cross section width (6) of the tooth (4), dk is a tip diameter (7), and df is a root diameter (8).

Description

Gear

Technical field

The present invention relates to a kind of gear, described gear includes the gear mass with the profile of tooth formed by a series of teeth Or be made up of described gear mass, between tooth, wherein form backlash.The invention still further relates to one and include at least two The gapless gear drive of individual pitch wheel.

Background technology

Gapless gear drive is generally realized by so-called separation gear.As such as from WO In 2005/090830 A1 known.

Additionally, be known as the gear for gapless gear driving device from WO 2012/037593 A2 Form the profile of tooth with non-homogeneous tooth.

Summary of the invention

The technical problem to be solved be can by sintering technology simply manufacture for nothing The gear of gap teeth wheel transmission device.

The technical problem to be solved solves in aforesaid gears in the following way, i.e. makes ratio b_max/((d_k-d_f)/2) it is at least 1:2, wherein b_maxIt is the maximum cross section width of tooth, d_kIt is tip diameter, And d_fIt it is root diameter.Additionally, the technical problem to be solved is with aforementioned gear drive Solving, at least one of gear therein is formed according to the present invention.

Here, advantageously profile of tooth is become more soft than conventional profile of tooth has more bending by the deepest backlash Property, so that described tooth can be made a concession when engaging joint with other gear, therefore can realize two gears Engagement engage gapless.Meanwhile, gear can be simply by sintering technology manufacture, because gear Whole teeth of profile of tooth have maybe can have identical geometry.By the deepest backlash, the flank of tooth can divide For free space unassembled with the tooth of the mesh regional of other gear and other tooth-formation of gear, with this The flexibility of engagement joint aging time raker tooth can be improved.Therefore, it is no longer required for such as the situation in so-called separation gear Gear is divided into master gear and relative to the coilable gear of master gear.Therefore, the tooth of meshed gears is being nibbled Reliably it is placed on during conjunction on the whole width on the axial direction of tooth-formation of gear, the pressure-bearing of gear can be improved with this Figure, i.e. its mechanical load.Additionally, reduce owing to engaging, with engaging of other gear, the noise shape caused Become.

For improving this effect, can advise so that ratio b according to further implementing variant_max/((d_k-d_f)/2) Between 1:3 and 1:5.

Also can advise at least partially having the cross section tapered towards tooth root direction so that tooth, can be further with this The flexibility of the tooth in improvement tooth root region.

Can advise so that flank has depression according to other enforcement variant.Can be more preferable by this depression of flank Ground limits the tooth of other gear when engagement engages by the region put, and can improve when engagement engages with this Tooth mutually by putting.Especially, the circular runout that gear can be improved with this, can prevent separately because passing through depression The tooth ratio of outer gear wishes that situation is deeper bonded in tooth-formation of gear.

Preferably advise at this starting at recess so that the tapered region of tooth so that the flank of gear can essence Fidelity is divided into two regions surely, i.e. for engaging the region of the tooth engaging other gear and for providing tooth The region of at least most of flexibility.

But it can be possible that backlash is partly filled with elastomeric material.Therefore shock damper can be realized Form so that tooth despite the presence of bending flexible but also can preferably bear be in operation impact load unexpectedly Lotus.Therefore, the mechanical load-bearing capability of profile of tooth can be improved.

For improving the effect of impact damping further, can advise so that elastomer according to the preferably extension of gear Material starts to extend up at most 2/3rds of the total depth of backlash from root circle.

Preferably advise at this so that flank has depression and elastomer is arranged in below depression, the most especially Preferably suggestion makes elastomeric material arrange at interval with depression.Therefore can realize so that tooth is in circumference side In bigger scope upwards flexible, because elastomeric material despite the presence of possible extruding but is not pressed into To with in the mesh regional of the tooth of other gear.

Elastomeric material can be connected with gear mass.Therefore elastomeric material can be prevented to carry due to periodic tension and compression Lotus and be partly extruded from backlash.Therefore can be by elastomeric material volume maximization in backlash, and not There is the risk that the tooth of other gear contacts with elastomeric material when engagement engages.Contacted by this, bullet Elastomer material, by being pushed into deeper inside in backlash, the most therefore also impacts negatively on the footpath of gear drive To beating and being likely to occur higher the formation of noise.

For in elastomeric material is simply placed at backlash and if desired for can more simply change elastomer Material, can advise so that elastomeric material is formed as the shape with the loop member of the one with annular matrix Formula, arranges the finger shape element extended in the axial direction on the matrix, and wherein finger shape element is arranged in tooth Gap is interior and annular matrix is arranged on gear mass in side.By additionally arranging elastomeric material in side, The additional impact damping on the axial direction of gear can be realized in addition, such as when arrangement of gears is on axle head Time.

Accompanying drawing explanation

For being more fully understood that the present invention, explain in detail the present invention according to drawings described below.

Each figure is shown in the diagram schematically simplified:

Fig. 1 shows multiple enforcement variants of gear in axial view；

Fig. 2 shows the 3rd enforcement variant of gear in angled view.

Reference list

1 gear

2 gear masses

3 profiles of tooth

4 teeth

5 backlash

6 cross-sectional width

7 tip diameters

8 root diameters

9 tooth roots

10 depressions

11 roundings

12 materials

13 loop members

14 matrixes

15 elements

16 axles

17 shaft shoulders

Detailed description of the invention

First it should be appreciated that in the form of implementation differently described of gear apparatus, identical part provides With identical drawing reference numeral or identical part numbers, the disclosure wherein comprised in overall description is taken notice of The identical part with identical drawing reference numeral or identical part numbers can be extended in justice.Institute in the de-scription The position description selected, the most upper and lower, side etc. referring also at accompanying drawing that is that directly describe and that illustrate, And extend to new position when position change according to meaning.

In terms of with the effect individually implementing variant realization of the present invention, with reference to elaboration above.

Fig. 1 view in the axial direction shows multiple enforcement variants of gear 1.Gear 1 is preferably Be so-called toothed belt gear, i.e. gear 1 is used for engaging joint cingulum.But the probability that there is also is gear 1 It is provided for engaging the other gear of soldered tooth wheel transmission device.

Gear 1 has gear mass 2, and described gear mass has by a series of tooth 4 shapes on its outer radial periphery face The profile of tooth 3 become.Backlash 5 is defined between tooth 4.Preferably, gear mass 2 and tooth 4 define one Parts.Further, it is preferable to all teeth 4 construct in the same manner and have identical cross section.

With the gear mass 2 of tooth 4 partly according to sintering method manufacture, especially by sintering Steel making, is wherein used as other material, such as bronze or pyrite.But the gear mass 2 with tooth 4 Also can be formed by complete material at least in part, such as, be manufactured by casting.

Gear 1 can be formed on the most not shown axle concentrically therewith, particularly on axle head, logical Cross described axle can be arranged on the other parts of actuating device by gear 1.But preferably, gear 1 has For receiving the centre bore (the most not shown) of axle.

As seen in Figure 1, backlash 5 is configured to the deepest.Ratio b_max/((d_k-d_f)/2) at least 1:2.? This, b_maxIt it is the maximum cross section width 6, d observed in the axial direction of tooth 4_kIt it is tip diameter 7 And d_fIt it is root diameter 8.Term " tip diameter 7 " and " root diameter 8 " correspondingly use The general definition of gear.

Preferably, ratio b_max/((d_k-d_f)/2) between 1:3 to 1:5.

In principle, gear 4 can have holding phase in the length from tip diameter 7 to root diameter 8 With cross-sectional width 6, this in FIG according to gear 4 with dotted line illustrate, the most in this case, tooth Top also can have the corner of rounding for preferably joint cingulum or one or more other gear.

Preferably implementing in variant at gear 1, the direction that tooth 4 at least partially has towards tooth root 9 is tapered Cross section so that therefore cross-sectional width 6 in the subregion of the degree of depth of backlash 5 at tip diameter Diminish between 7 and root diameter 8.Preferably, cross-sectional width 6 is formed as persistently reducing.But also deposit Probability be the tapered process following non-continuous, with the reduction of every at least one phase step type of flank.

As from Fig. 1 furthermore, it can be seen that according to implement variant can advise being respectively provided with so that the flank of tooth 4 to Few one particularly one depression 10.

The top 1/3rd of the depression 10 preferably flank on the outside circle being connected to tooth 4 is formed. Especially, depression 10 can be respectively arranged or be formed at the top 1/3rd of flank and middle part 1/3rd it Between transitional region in.

For the in the case of of arranging or form depression 10, the taper region of tooth caves at this and starts at 10 and extend Until the root circle of tooth 4, as seen in Figure 1.

Further preferably depression 10 is respectively provided with rounding 11, therefore the gear tooth profile of tooth 4 to be formed as Preferably engagement engages other profile of tooth, the profile of tooth of such as cingulum or other tooth-formation of gear.In depression 10 area below the most in this case but are not the most generally provided as For engaging the tooth of other profile of tooth.

Other enforcement variant according to gear 1 can be advised so that backlash 5 partly with elastomeric material 12 Fill.

Elastomeric material 12 is made up of rubber elastic material at least in part, such as by (x) NBR ((carboxyl) third Alkene nitrile-butadiene rubber), HNBR (hydrogenated nitrile-butadiene rubber), silicone rubber (VMQ), NR (natural rubber), EPDM (ethylene propylene diene rubber), CR (neoprene), SBR (SBR styrene butadiene rubbers) etc. make, its In be used as material blends.

" at least in part " here mean that and can insert reinforced element, such as example in elastomeric material 12 Such as the fiber being made up of metal, plastics, natural fiber etc. and/or line, or rod etc..But preferably elastomer Material is only made up of rubber elastic material.

Elastomeric material 12 preferably starts to extend up to the depth capacity of backlash 5 from the root circle of tooth 4 Most 2/3rds.Radial outer end can be provided with rounding as illustrated, and described rounding has at each tooth root 9 Direction on protuberance.The bottom of backlash also can construct roundedly, the most elastic Body material 12 copies this rounding to shape.

When providing depression 10 on flank, elastomeric material 12 is preferably arranged in this depression 10 Below and cave in 10 arranged spaced apart with this with being particularly preferred.

Preferably, elastomeric material 12 is connected with gear mass 2.This can be by elastomeric material 12 at gear Sulfuration on body 2 realizes.But elastomeric material 12 also can be made to bond with gear mass.Also shape can be manufactured The connection that face coordinates, such as, engage recess within it by being embedded in elastomer 12 at the flank of tooth 4 Realize.

Implement in variant at this, elastomeric material 12 elastomer element formed forms intrinsic unit respectively Part, wherein arranges each backlash 5 of this elastomer element.

Illustrate the enforcement variant of gear 1 in fig. 2 in angled view and in sectional view for this, it is hit by a bullet Elastomer material 12 has the form of the loop member 13 of one, and described loop member 13 is formed as annular matrix 14 Form, described matrix 14 forms the finger shape element 15 extended in the axial direction, wherein finger-type unit In part 15 is arranged in backlash 5 and annular matrix 14 is arranged in tooth side (when observing in the axial direction) On wheel body 2.

It should be noted that the enforcement variant according to Fig. 2 is the independent embodiment of gear 1 if desired, and for phase With part use and identical drawing reference numeral in earlier figures 1 or part numbers.For avoiding unnecessary weight Multiple, with reference to or quote the detailed description of Fig. 1.

Annular matrix 14 can be connected if desired for gear mass 2, as hereinbefore explained for elastomeric material 12 State.

Possibility exist that annular matrix 14 is by the other elastomer different from finger shape element 15 further Material is made or has other elastomeric material.

As it can be seen in fig. 2 that gear 1 has and the hole of profile of tooth 3 arranged concentric.By this hole, described tooth Wheel 1 may be arranged on axle 16.Axle 16 can have the shaft shoulder 17 arranged spaced apart with gear mass 2.With The annular matrix 14 of ring-type element 13 is arranged so that ring-type element 13 1 in this intermediate space formed Aspect leans against on gear mass 2 on side and on the other hand leans against on this shaft shoulder.

The annular matrix 14 of loop member 13 can extend up to axle 16 and by being placed on described axle 16.But also may be used Be the spaced layout as made annular matrix and axle 16 as can be seen from Fig. 2, with therefore at ring Shape matrix 14 extrudes and realizes elastomeric material 12 dodging on the direction of axle 16 in the case of tight.

Annular matrix 14 can be made further to be connected with the shaft shoulder 17, as hereinbefore for elastomeric material 12 Illustrated.

Embodiment shows the possible enforcement variant of gear 1, wherein it should be noted here that also can be real by each Execute variant to be differently mutually combined.

For clarity, then it should be noted that the structure for being more fully understood that gear 1, described gear 1 or its Ingredient illustrates the most not in scale, and/or illustrates enlargedly, and/or illustrates with reducing.

Claims

1. a gear (1), described gear (1) includes with the profile of tooth formed by a series of teeth (4) (3) gear mass (2), wherein, forms backlash (5), it is characterised in that ratio between tooth (4) b_max/((d_k-d_f)/2) it is at least 1:2, wherein b_maxIt is the maximum cross section width (6) of tooth (4), d_kIt is Tip diameter (7), and d_fIt is root diameter (8).

Gear the most according to claim 1 (1), it is characterised in that ratio b_max/((d_k-d_f)/2) Between 1:3 to 1:5.

Gear the most according to claim 1 and 2 (1), it is characterised in that tooth (4) at least local Ground has the cross section tapered towards tooth root (9) direction.

Gear the most according to claim 1 and 2 (1), it is characterised in that flank has depression (10).

Gear the most according to claim 4 (1), it is characterised in that the taper region of tooth (4) exists Depression (10) place starts.

Gear the most according to claim 1 and 2 (1), it is characterised in that backlash (5) is partly Fill with elastomeric material (12).

Gear the most according to claim 6 (1), it is characterised in that elastomeric material (12) from Root circle starts to extend up at most 2/3rds of the total depth in radial directions of backlash (5).

Gear the most according to claim 6 (1), it is characterised in that flank has depression (10) And elastomeric material (12) is arranged in depression (10) below.

Gear the most according to claim 8 (1), it is characterised in that elastomeric material (12) with Depression (10) is arranged spaced apart.

Gear the most according to claim 6 (1), it is characterised in that elastomeric material (12) with Gear mass (2) connects.

11. gears according to claim 6 (1), it is characterised in that elastomeric material (12) shape Become the form of the loop member (13) of the one having with annular matrix (14), at described annular matrix (14) finger shape element (15) that upper layout extends in the axial direction, wherein finger shape element (15) is arranged In backlash (5), and annular matrix (14) is arranged on gear mass (2) in side.

12. 1 kinds of gapless gear driving devices, described gear drive includes that at least two engages each other The gear engaged, it is characterised in that one in described gear is formed as according in claim 1 to 11 Gear (1) described in any one.