CN206145079U - Rack and pinion drive assembly and transmission - Google Patents

Rack and pinion drive assembly and transmission Download PDF

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Publication number
CN206145079U
CN206145079U CN201621121161.7U CN201621121161U CN206145079U CN 206145079 U CN206145079 U CN 206145079U CN 201621121161 U CN201621121161 U CN 201621121161U CN 206145079 U CN206145079 U CN 206145079U
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China
Prior art keywords
tooth
bar
plane
gear
face
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CN201621121161.7U
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Chinese (zh)
Inventor
费家怡
辛栋
李平
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Shenzhen mechatronics, mechatronics and Limited by Share Ltd
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Shenzhen Zhaowei Machinery and Electronics Co Ltd
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Priority to CN201621121161.7U priority Critical patent/CN206145079U/en
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Abstract

The utility model belongs to the technical field of mechanical transmission, a transmission of rack and pinion drive assembly reaches including this drive assembly is provided. The rack includes along rack gear orientation alternate and slanted bar tooth and riglet tooth that set up in turn, the preceding terminal surface and the rear end face of slanted bar tooth are the plane, and the plane of perpendicular to rack gear orientation is first plane, and the contained angle between preceding terminal surface and rear end face and the first plane is the acute angle, and it is the second plane to be on a parallel with the first planar plane of rack gear orientation and perpendicular to, and the contained angle between preceding terminal surface and rear end face and the second plane is the acute angle, with first plane and second plane in the equal parallel rectilinear direction, the length of slanted bar tooth is greater than the length of riglet tooth, the flank of tooth of teeth of a cogwheel both sides is connected through the chamfer face respectively with between the terminal surface of the adjacent teeth of a cogwheel, and two adjacent chamfer facial featuress are handed over in an intersecting line. The rack and pinion drive assembly meshing of this kind of structure is smooth and easy, has avoided interfering or blocking dead problem among the wheel and rack engagement process.

Description

Rack pinion component and drive apparatus
Technical field
This utility model belongs to technical field of mechanical transmission, more particularly to a kind of rack pinion component and transmission set It is standby.
Background technology
Rack pinion is a kind of kind of drive important in mechanical transmission fields, in instrument and meter, plant equipment, is led to The fields such as news, medical treatment have a wide range of applications.
With the development of technology, in order that compact equipment meets Miniaturization Design requirement, a tooth is often taken Coordinate to be engaged transmission between wheel and multiple tooth bars.When gear is moving to another tooth from a tooth bar in existing design During bar, because the anglec of rotation of gear is arbitrary, often there is rack-and-pinion and occur in mobile engagement process Interfere, or even stuck situation, this not only damages the precision of gear and tooth bar in end face, while also having a strong impact on the steady of transmission Property.
The content of the invention
The purpose of this utility model is to provide a kind of rack pinion component and drive apparatus, it is intended to solve existing skill Rack-and-pinion how is avoided to interfere in mobile engagement process in art, or even stuck technical problem.
This utility model is achieved in that a kind of rack pinion component, including gear and engages with the gear Tooth bar, the gear includes multiple gear teeth, the gear teeth described in adjacent two form gear teeth groove, and the tooth bar includes top for plane Matrix, multiple bar teeth being arranged at intervals in described matrix, bar tooth described in adjacent two forms bar teeth groove, the bar with described matrix Tooth includes slanted bar tooth that is alternate along the rack gear direction and being arranged alternately and riglet tooth;The front end face of the slanted bar tooth is with after End face is plane, and the plane perpendicular to the rack gear direction is the first plane, the front end face and the rear end face with Angle between first plane is acute angle, parallel to the rack gear direction and perpendicular to the flat of first plane Face is the second plane, and the angle between the front end face and the rear end face and second plane is acute angle;With it is described The first plane rectilinear direction parallel with second plane, the length of the slanted bar tooth is more than the length of the riglet tooth; The flank of tooth of the gear teeth both sides is connected respectively between the end face of the adjacent gear teeth by fillet surface, chamfering described in adjacent two Face intersects at an intersection.
Preferably, the front end face and rear end face of the slanted bar tooth is symmetricly set in the centrage both sides of the tooth bar matrix.
Preferably, the rear and front end face of the riglet tooth be each perpendicular to described matrix top and with the rack gear direction It is parallel.
Preferably, the bar flank profil of the bar tooth is skew lines, and the tooth profile of the gear teeth is involute.
Preferably, the extended line of the intersection is symmetrical arranged by the gear centre, and fillet surface described in adjacent two In the intersection both sides.
Further, the rack pinion component includes a gear and the multiple institutes engaged with the gear State tooth bar.
Further, the rack pinion component includes a tooth bar and the multiple institutes engaged with the tooth bar State gear.
Further, the rack pinion component includes multiple tooth bars and the multiple institutes engaged with the tooth bar State gear.
Further, the tooth bar and the tooth-formation of gear are straight-tooth.
This utility model also provides a kind of drive apparatus, and the drive apparatus include above-mentioned rack pinion component.
This utility model having the technical effect that relative to prior art:The rack pinion component on tooth bar by setting Slanted bar tooth and riglet tooth are put, and is engaged with the tooth bar using the gear, to realize power transmission;Specifically, will be described oblique It is acute angle and the front end face by the helical rack that the front end face and rear end face of tooth bar is arranged to the angle between the first plane And it is acute angle that rear end face is arranged to the angle between the second plane;And the flank of tooth of gear teeth both sides is respectively between the face of rear and front end Connected by fillet surface, adjacent two fillet surface intersects at an intersection, during so that the gear teeth being engaged with slanted bar tooth and riglet tooth, the gear teeth Fillet surface can smoothly slide on the front end face of slanted bar tooth or rear end face;Parallel with the first plane and the second plane In rectilinear direction, the length of slanted bar tooth is more than the length of riglet tooth, therefore, the gear teeth can be first in wheel and rack engagement process Slanted bar tooth is first contacted, bar teeth groove is then smoothly slipped into, and is unlikely to occur gear in engagement process and tooth bar is interfered very To stuck problem.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, below will to this utility model embodiment or The accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings described below is only Some embodiments of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, Can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is that this utility model embodiment provides tooth bar schematic perspective view;
Fig. 2 is the enlarged drawing of regional area M in Fig. 1;
Fig. 3 is the top view of Fig. 1 middle racks;
Fig. 4 is the enlarged drawing of regional area N in Fig. 3;
Fig. 5 is that this utility model embodiment provides gear schematic perspective view;
Fig. 6 is the front view of Fig. 5 middle gears;
Fig. 7 is that the gear that this utility model embodiment is provided moves the schematic perspective view for engaging from different tooth bars;
Fig. 8 be it is a kind of in Fig. 7 in the case of rack and pinion engagement when floor map;
Fig. 9 is the floor map in Fig. 7 in the case of another kind during rack and pinion engagement;
Figure 10 is the floor map in Fig. 7 in the case of another during rack and pinion engagement.
Description of reference numerals:
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element is represented to same or similar label eventually or the element with same or like function.Below by ginseng The embodiment for examining Description of Drawings is exemplary, it is intended to for explaining this utility model, and it is not intended that to this utility model Restriction.
In description of the present utility model, it is to be understood that term " length ", " width ", " on ", D score, " front ", " afterwards ", the orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " is based on attached Orientation or position relationship shown in figure, is for only for ease of description this utility model and simplifies description, rather than indicates or imply The device or element of indication must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this The restriction of utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two More than, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, it is for example, it may be fixedly connected, or be detachably connected or integral;Can be It is mechanically connected, or electrically connects;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning of the above-mentioned term in this utility model.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.
Accompanying drawing 1 be refer to accompanying drawing 5 and accompanying drawing 8 to accompanying drawing 10, this utility model embodiment provides a kind of rack-and-pinion and passes Dynamic component, including gear 20 and the tooth bar 10 that engages with the gear 20, the gear 20 includes multiple gear teeth 21, adjacent two institute State the gear teeth 21 and form wheel teeth groove 22, the tooth bar 10 include top for plane matrix 13, multiple be arranged at intervals at described matrix Bar tooth 11 on 13, bar tooth 11 described in adjacent two forms bar teeth groove 12 with described matrix 13, and the bar tooth 11 is included along the tooth The transmission direction of bar 10 is alternate and the slanted bar tooth 111 that is arranged alternately and riglet tooth 112;The He of front end face 1111 of the slanted bar tooth 111 Rear end face 1112 is plane, perpendicular to the transmission direction of the tooth bar 10 plane be the first plane A, the He of the front end face 1111 Angle between the rear end face 1112 and first plane A is acute angle, parallel to the transmission direction of the tooth bar 10 and vertical The straight plane in first plane A is the second plane B, and the front end face 1111 and the rear end face 1112 are flat with described second Angle between the B of face is acute angle;It is described in the rectilinear direction parallel with first plane A and second plane B Length of the length of slanted bar tooth 111 more than the riglet tooth 112;The flank of tooth 212 of the both sides of the gear teeth 21 is described with adjacent respectively Connected by fillet surface 213 between the end face of the gear teeth 21, fillet surface 213 described in adjacent two intersects at an intersection 214.
It should be noted that as shown in Fig. 2 defining transmission directions of the first direction X for tooth bar 10, i.e., described slanted bar tooth 111 and the direction that is arranged alternately of the riglet tooth 112;The plane definition vertical with first direction X is the first plane A;
It is vertical with the transmission direction of tooth bar 10 and parallel with the top of described matrix 13 direction to define second direction Y, i.e., the Two direction Y are vertical with first direction X;With second direction Y parallel and perpendicular to the first plane A plane definition be the second plane B;
It is perpendicular to the direction at the top of matrix 13, i.e. third direction Z and first direction X and second party to define third direction Z It is vertical two-by-two to Y;It is with the 3rd plane C parallel to third direction Z and vertical two-by-two with the first plane A and the second plane B.
In this embodiment, the top surface of the top surface of the slanted bar tooth 111 and the riglet tooth 112 is parallel to each other, and parallel In the second plane B.
The rack pinion component that this utility model embodiment is provided has slanted bar by arranging on the tooth bar 10 The tooth bar 10 of tooth and riglet tooth, and engaged with the tooth bar 10 using the gear 20, to realize power transmission;Specifically, will It is acute angle and general that the front end face 1111 and rear end face 1112 of the helical rack 111 is arranged to the angle between the first plane A The front end face 1111 and rear end face 1112 of the helical rack 111 is arranged to the angle between the second plane B be acute angle;And the gear teeth The flank of tooth 212 of 21 both sides is connected respectively between the face of rear and front end by fillet surface 213, and adjacent two fillet surface 213 intersects at one Bar intersection 214;During so that the gear teeth 21 being engaged with slanted bar tooth 111 and riglet tooth 112, the fillet surface 213 of the gear teeth 21 can be in slanted bar Smoothly slide on the front end face 1111 or rear end face 1112 of tooth.Simultaneously the length of slanted bar tooth 111 is more than riglet tooth in Y-direction 112 length, therefore, longer slanted bar tooth 111 can be first contacted with the gear teeth 21 in the engagement process of tooth bar 10 in gear 20, so Smoothly put bar teeth groove 12 under afterwards, and be unlikely to occur in engagement process gear 20 and tooth bar 10 interferes even stuck asking Topic.
When gear 20 moves into tooth bar 10 to be engaged transmission along second direction Y forward or backwards, exist as Lower three kinds of situations:
The first situation, as shown in Figure 8, if the gear teeth 21 of gear 20 are just relative with the bar teeth groove 12 of tooth bar 10 When, no matter gear 20 and tooth bar 10 be using the version in the present embodiment, or using general normal structure, can be smooth Normally engage with tooth bar 10 in tooth bar 10.
Second situation, as shown in accompanying drawing 2, accompanying drawing 4 and accompanying drawing 9, if the bar tooth of the gear teeth 21 of gear 20 and tooth bar 10 11 it is relative when, due to angle of the slanted bar tooth 111 not only between front end face 1111 and plane A of rear end face 1112 and first be it is sharp Angle between angle, and front end face 1111 and plane B of rear end face 1112 and second is also before acute angle, i.e. slanted bar tooth 111 In the first direction there is constant slope in X and third direction Z for end face 1111 and rear end face 1112;Meanwhile, the tooth of the both sides of the gear teeth 21 Face 212 is connected respectively between the end face of the adjacent gear teeth 21 by fillet surface 213, and fillet surface 213 described in adjacent two Intersect at an intersection 214, the i.e. gear teeth 21 and there is no plane in end.Therefore in the case of this kind of engagement, the end face of slanted bar tooth 111 With the direct linear contact lay of intersection 214 on the end face of gear 20, during gear 20 is continued to move to, gear 20 need to produce slight rotation The normal position of engagement in tooth bar 10 can be entered after turning, so as to smoothly complete engagement.
The third situation, as shown in accompanying drawing 2, accompanying drawing 4 and accompanying drawing 10, if the wheel of the bar teeth groove 12 of tooth bar 10 and gear 20 When teeth groove 22 is relative, due to the rear end face of any point and the same slanted bar tooth 111 on the front end face 1111 of slanted bar tooth 111 The distance between any point is all higher than the ultimate range between arbitrary both ends of the surface of riglet tooth 112 on 1112, i.e., along Y-direction The length of upper slanted bar tooth 111 more than riglet tooth 112 length, therefore two gear teeth 21 of gear 20 can not simultaneously with tooth bar 10 Slanted bar tooth 111 and riglet tooth 112 are contacted, but one first contacts contact after another.Specifically, the now gear teeth of gear 20 21 end faces that can first contact slanted bar tooth 111 longer in tooth bar 10.Now, described the third situation is converted into described second Situation, i.e., the gear teeth 21 of the tooth of the gear teeth 21 for first contacting when second situation are slightly rotated in the way of contacting with bar tooth 11 Afterwards, during gear 20 is continued to move to, gear 20 is able to smoothly enter position when normally engaging with tooth bar 10.
In the case of above-mentioned three kinds, gear 20 and tooth bar 10 are capable of achieving smooth engagement, it is to avoid gear 20 and tooth bar 10 are nibbled Interfere even stuck problem during conjunction, reduce the impact that mutually collision is produced between transmission component in engagement process, subtract The abrasion caused to equipment and the stationarity that improve transmission are lacked.
The gear 20 that above-mentioned three kinds of situations are assumed enters forward or backwards tooth bar as driving link along second direction Y 10, so it is easy to understand that tooth bar 10 can also forward or backwards move into gear 20 as driving link along second direction Y, Now action principle is identical with above-mentioned three kinds of situations, and here is omitted.
Accompanying drawing 2 be refer to accompanying drawing 4, it is preferable that the front end face 1111 and rear end face 1112 of slanted bar tooth 111 is symmetricly set in The centrage both sides of the matrix 13 of tooth bar 10.Using symmetrically arranged rear and front end face, can facilitate gear 20 no matter along second When direction Y moves into forward or backwards slanted bar tooth 111, can smoothly engage.While symmetrically arranged version, also can be square Just manufacture is designed, strengthens the versatility of the part of tooth bar 10.
Accompanying drawing 2 be refer to accompanying drawing 4, it is preferable that the rear and front end face of riglet tooth 112 is each perpendicular to the top of described matrix 13 And it is parallel with the transmission direction of the tooth bar 10, i.e. the rear and front end face of riglet tooth 112 is parallel with the 3rd plane C.Riglet tooth 112 Front/rear end 1112 will not have any impact to the engagement process of gear 20 and tooth bar 10 for perpendicular, but advantageously reduce Workload during difficulty of processing, the reduction processing and manufacturing of tooth bar 10 of tooth bar 10, is conducive to improve production efficiency.
Refer to accompanying drawing 5 and accompanying drawing 6, it is preferable that it is skew lines that the bar tooth 11 of bar tooth 11 is wide, and the exterior feature of the gear teeth 21 of the gear teeth 21 is Involute.Using the gear 20 with the exterior feature of involute gear tooth 21 and the drive mechanism of the tooth bar 10 with skew lines flank profil, gear 20 and tooth bar 10 in engagement process have the angle of engagement it is constant all the time the characteristics of, more constant instantaneous transmission ratio can be realized, have There is preferable stationarity during beneficial to gear 20 and the normal engaged transmission of tooth bar 10.
Refer to accompanying drawing 5 and accompanying drawing 6, it is preferable that the extended line of the intersection 214 passes through the center of gear 20, and adjacent Two fillet surfaces 213 are symmetricly set in the both sides of intersection 214.Using symmetrically arranged two fillet surface 213, on the one hand can facilitate to tooth Taking turns 20 end faces carries out chamfer machining, strengthens the versatility of the part of gear 20, and the effect of another aspect is gear 20 from different positions Put in the engagement process of tooth bar 10, the impact size of tooth bar 10 is similar to, and both times of engagement are also essentially identical, two fall The abrasion that edged surface 213 is subject in use is also essentially identical, it is to avoid unilateral rapid wear, the use longevity of reduction gear 20 Life.
Further, rack pinion component includes a gear 20 and the multiple tooth bars 10 engaged with gear 20.For Convenient explanation, refer to accompanying drawing 1 and accompanying drawing 7, illustrate by taking a gear 20 and two tooth bars 10 as an example.Assume gear 20 With the first tooth bar 10a original states to engage, gear 20 can enter the second tooth bar along the movement engagement of W directions shown in accompanying drawing 7 10b.Using a gear 20 and the drive mechanism of the multiple tooth bars 10 engaged with gear 20, overall compact, formation can cut The rack pinion mode changed, so as to realize the miniaturization and multifunction of actuating device.
Refer to accompanying drawing 1 and accompanying drawing 7, it is to be understood that rack pinion component can also include a tooth bar 10 And the multiple gears 20 engaged with tooth bar 10.The structure of one gear 20 and multiple tooth bars 10 and said one tooth bar 10 and multiple The structure of gear 20 differs primarily in that this hour rack 10 is driving link, and the position of gear 20 is the mistake of the engagement of tooth bar 10 It is relatively fixed in journey motionless.
Accompanying drawing 1 and accompanying drawing 7 are refer to, it can also be appreciated that rack pinion component can also include multiple teeth Bar 10 and the multiple gears 20 engaged with tooth bar 10.Now gear 20 and tooth bar 10 can be used as driving links, it is also possible to used as solid Fixed motionless driven member, so as to realize various different rack-and-pinion connected modes.
Further, as shown in accompanying drawing 2 and accompanying drawing 5, the profile of tooth of tooth bar 10 and gear 20 is straight-tooth.The structure design of straight-tooth Fairly simple, process for machining and manufacturing is ripe, transmission efficiency and rotational noise is relatively small, is current rack pinion structure In topmost profile of tooth species.
This utility model embodiment also provides a kind of drive apparatus, and drive apparatus include above-mentioned rack pinion group Part.The rack pinion component adopts above-mentioned version, and here is omitted.This kind of drive apparatus, structure design It is compact, and the kind of drive is various, can meet the various types of needs in commercial production.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit this utility model Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model Protection domain within.

Claims (10)

1. a kind of rack pinion component, including gear and the tooth bar engaged with the gear, the gear includes multiple wheels Tooth, the gear teeth described in adjacent two form gear teeth groove, the tooth bar include top for plane matrix, multiple be arranged at intervals at the base Bar tooth on body, bar tooth described in adjacent two forms bar teeth groove with described matrix, it is characterised in that the bar tooth is included along the tooth Bar transmission direction is alternate and the slanted bar tooth that is arranged alternately and riglet tooth;The front end face and rear end face of the slanted bar tooth is plane, Plane perpendicular to the rack gear direction is the first plane, the front end face and the rear end face and first plane it Between angle be acute angle, parallel to the rack gear direction and perpendicular to first plane plane be the second plane, Angle between the front end face and the rear end face and second plane is acute angle;With first plane and described In the parallel rectilinear direction of second plane, the length of the slanted bar tooth is more than the length of the riglet tooth;The gear teeth both sides The flank of tooth connected by fillet surface between the end face of the adjacent gear teeth respectively, fillet surface described in adjacent two intersects at one Intersection.
2. rack pinion component as claimed in claim 1, it is characterised in that the front end face and rear end face of the slanted bar tooth It is symmetricly set in the centrage both sides of the tooth bar matrix.
3. rack pinion component as claimed in claim 1, it is characterised in that hang down in the rear and front end face of the riglet tooth It is straight in described matrix top and parallel with the rack gear direction.
4. rack pinion component as claimed in claim 1, it is characterised in that the bar flank profil of the bar tooth is skew lines, The tooth profile of the gear teeth is involute.
5. rack pinion component as claimed in claim 1, it is characterised in that the extended line of the intersection passes through the tooth Wheel center, and fillet surface described in adjacent two is symmetricly set in the intersection both sides.
6. rack pinion component as claimed in claim 1, it is characterised in that the rack pinion component includes The individual gear and the multiple described tooth bar engaged with the gear.
7. rack pinion component as claimed in claim 1, it is characterised in that the rack pinion component includes The individual tooth bar and the multiple described gear engaged with the tooth bar.
8. rack pinion component as claimed in claim 1, it is characterised in that the rack pinion component includes many The individual tooth bar and the multiple described gear engaged with the tooth bar.
9. the rack pinion component as described in any one of claim 1 to 8, it is characterised in that the tooth bar and the tooth The profile of tooth of wheel is straight-tooth.
10. a kind of drive apparatus, it is characterised in that the drive apparatus include the gear as described in any one of claim 1 to 9 Rack gear component.
CN201621121161.7U 2016-10-13 2016-10-13 Rack and pinion drive assembly and transmission Active CN206145079U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621121161.7U CN206145079U (en) 2016-10-13 2016-10-13 Rack and pinion drive assembly and transmission

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Application Number Priority Date Filing Date Title
CN201621121161.7U CN206145079U (en) 2016-10-13 2016-10-13 Rack and pinion drive assembly and transmission

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107143628A (en) * 2016-10-13 2017-09-08 深圳市兆威机电有限公司 Rack pinion component and drive apparatus
CN112996737A (en) * 2018-09-14 2021-06-18 阿勒特创新股份有限公司 Climbing robot with flexible pinion driving device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107143628A (en) * 2016-10-13 2017-09-08 深圳市兆威机电有限公司 Rack pinion component and drive apparatus
WO2018068355A1 (en) * 2016-10-13 2018-04-19 深圳市兆威机电有限公司 Rack and pinion drive component and drive equipment
CN112996737A (en) * 2018-09-14 2021-06-18 阿勒特创新股份有限公司 Climbing robot with flexible pinion driving device

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Address after: 518000 Guangdong Shenzhen Baoan District Fuyong Street Dragon King Temple Industrial Park 18

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