CN105987156A - Rack structure - Google Patents
Rack structure Download PDFInfo
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- CN105987156A CN105987156A CN201510073465.4A CN201510073465A CN105987156A CN 105987156 A CN105987156 A CN 105987156A CN 201510073465 A CN201510073465 A CN 201510073465A CN 105987156 A CN105987156 A CN 105987156A
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- China
- Prior art keywords
- base portion
- teeth
- face
- rack structure
- teeth portion
- Prior art date
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Abstract
The invention relates to a rack structure which comprises a tooth part and a base part. The tooth part and the base part extend in the axial direction and are arranged up and down. The tooth part is provided with a plurality of teeth and toothed grooves which are sequentially arranged alternately; the long end faces of the two sides of the tooth part in the axial extending direction symmetrically form proper slopes from the base part to the top end of the tooth part; and a boundary is formed at the adjoining position of each slope and the base part in the axial extending direction of the base part due to the potential difference (angle). By the adoption of the structural design and cooperation of a two-section type grinding mode, the hardened tooth part and the base part which is not hardened are improved, so that the rack has the different characteristics of softness and hardness, and the problems that in the simultaneous grinding process, the ground surfaces are in a wavy shape, the loss of a grinding wheel is large, and the service life of the grinding wheel is short are solved.
Description
Technical field
The present invention is the technical field about a kind of machine components, particularly can carry
Rise tooth bar refine precision and improve abrasive wheel service life and vision benefit
Rack structure.
Background technology
The structure of known tooth bar 9, as shown in Figure 5,6, is axially to prolong with one
The rectangle steel stretched, processed formation one base portion 92, and it is formed at pedestal
Teeth portion 94 in portion 92.Wherein, teeth portion 94 has several according to presetting between tooth pitch
Double wedge 944 every configuration.Teeth portion 94 after processing is in order to be able to bear and other tooth
The stress that wheel component is interactive, it is necessary to suitable hardness property is provided, therefore need to enter again
Row cure process is processed with abrasion wheel grinding refine, can form accurate tooth bar 9
Finished product.
After above-mentioned cure process, the base portion 92 of tooth bar 9 is with teeth portion 94 respectively
There is different hardness factors, and when the long end face in tooth bar 9 bearing of trend both sides enters
Row refine adds man-hour, and base portion 92 and teeth portion 94 are all positioned at same machined surface,
Have into each other between default tooth pitch at each double wedge 944 in teeth portion 94 simultaneously
Every the teeth groove 942 arranged, thus result in and process of lapping produces interrupted grinding
State, and this process of lapping can produce some defects, such as；
(1) abrasion and abrasive wheel 1 surface of abrasive wheel 1 are easily accelerated
Deformation because abrasive wheel 1 is in process of lapping, the material being ground
When having interrupted incoherent teeth portion 94 shape, abrasive wheel is by teeth portion 94 quilt
The initial limit of each between cog of grinding-material, can bear bigger feeding drag,
Abrasive wheel surface will be produced just as blade by the initial limit being ground material
Raw maximum loss, and this double wedge is again through processing cure process, related is convex
Edge (border) hardness of tooth can be higher, the abrasive grit to abrasive wheel surface, will
Produce and bigger strike off effect；The circularity causing abrasive wheel is not enough, or abrasive wheel
Surface is uneven.And once abrasive wheel 24 areal deformation or wear intensity be not
Meanwhile, i.e. can form wavy abradant surface on the surface being ground, cause being subject to
The horizontal plane reference precision of grinding-material reduces.
(2) abrasive wheel 1 of same numbering is used, to having carried out
The teeth portion 94 of cure process and the base portion 92 of unhardened process are ground,
This lapping mode inherently also exists problem！Because material hardness is different, institute
The abrasive wheel 1 used ought to difference (the different grindings grinding numbering
Wheel), best grinding benefit could be obtained.And the teeth portion 94 of tradition tooth bar 9
Being same plane with base portion 92 side, general grinding personnel are directly with same
One abrasive wheel soft (base portion), hard (teeth portion) are with mill.If requiring that it is soft, hard
Separately grind, then, on same ground flat, grind soft, the boundary in territory, hard area
How to divide？The puzzlement that grinding personnel's process of lapping is the biggest, severe patient can be caused
More can cause have on same plane different grind height drop, and grind
The demarcation line of material soft, hard also cannot quickly be defined.
Therefore；How to improve material soft, hard to grind with same abrasive wheel, and
Clearly, the base portion 92 of different hardness and the grinding of teeth portion 94 are quickly defined
Demarcation line, it is ensured that and guide the abrasive wheel grinding coefficient in difference, grinding
Mill processing in abrasive wheel will not get over district grind cause abrasive wheel, ground flat to be subject to
Damage, so as to obtaining the end face quality of precise finiss, it is clear that be that industry is intended to improve
One of target.
Summary of the invention
Because the defect of above-mentioned known technology, one of present invention purpose, it is simply that
It is to provide a kind of rack structure, changes design by the appropriateness of structure, make tooth
Bar base portion and teeth portion axially extended both sides end face, have a potential difference relatively
(differential seat angle), say, that the long end face in teeth portion both sides is provided with a suitable oblique angle,
Non-same plane form (the i.e. long end face in teeth portion both sides is formed with the end face of base portion
With the end face of base portion not at same plane), solve above-mentioned known tooth bar with this
The defect produced when refine is ground.
According to above-mentioned purpose of the present invention, it is provided that a kind of rack structure, it includes axle
To extending and a teeth portion of upper and lower configuration and a base portion.This teeth portion has number
The most parallel individual alternately arranged denticle and teeth groove, and the axially extending direction of teeth portion
The long end face of both sides, symmetrical is formed suitably towards teeth portion top from base portion respectively
Inclined-plane, each inclined-plane and base portion joint or intersection, axial along base portion
Bearing of trend forms one demarcation line or transition wire because of potential difference (angle).By upper
State structure design, and coordinate two-part lapping mode, the tradition that is improved tooth bar
Side, at same plane, grinds with same abrasive wheel after having cure process
Teeth portion and the base portion of end cure process, derive above-mentioned disclosed problem.
Designed by said structure, and coordinate two-part lapping mode, improve tooth
Bar is because of the teeth portion after cure process and the base portion of end cure process, and has concurrently
Soft, the most different characteristics, solves during causing simultaneous grinding, causes grinding
Flat surface grinding is formed wavy, and abrasive wheel is lost the problems such as too short with the life-span.
Accompanying drawing explanation
Fig. 1 is rack structure schematic diagram of the present invention
Fig. 2 is another visual angle schematic diagram of embodiment illustrated in fig. 1
Fig. 3 is that 1 figure illustrated embodiment grinds schematic diagram ()
Fig. 4 is that 1 figure illustrated embodiment grinds schematic diagram (two)
Fig. 5 is known rack structure schematic diagram
Fig. 6 is that embodiment illustrated in fig. 5 grinds schematic diagram
Figure number illustrates: teeth portion 12, denticle 122, teeth groove 124 base portion 14, peace
Dress hole
142, inclined-plane 16, demarcation line 18, abrasive wheel 1, abrasive wheel 24,
Tooth bar 9, base portion 92, teeth portion 94, teeth groove 942, double wedge 944, angle
θ, denticle top end face are extremely demarcated to height h, the denticle top end face of teeth groove bottom
Spacing width a between the height L of line, the long end face in teeth portion both sides, base portion
Spacing width b between the long end face in both sides,
Detailed description of the invention
Hereinafter refer to relevant drawings and further illustrate rack structure of the present invention in fact
Execute example.For ease of understanding embodiment of the present invention, following similar elements uses phase
Illustrate with symbology.
Refer to shown in Fig. 1～4, the tooth bar of the present invention comprise axially extending and
One teeth portion 12 and a base portion 14 of upper and lower configuration, wherein；
Above-mentioned teeth portion 12, has the most alternately arranged several denticle 122 and tooth
Groove 124.And teeth portion 12 axially extends the long end face in both sides in direction, symmetry
An inclined-plane 16 is formed towards teeth portion 12 top with a θ angle respectively from base portion 14
And make each inclined-plane 16 and base portion 14 adjoiner because of potential difference (angle), nature edge
The axially extending direction of base portion 14 forms one transition wire or demarcation line 18.Real
Shi Shi, θ angle is less than 20 degree (20 ° ＞ θ ＞ 0 °) more than 0 degree, wherein
It is optimal with 5 degree.
Said base portion 14, along the long end face in tooth bar bearing of trend both sides, sets respectively
There is several installing hole 142.
It addition, this denticle 122 top end face is to denticle 122 bottom (teeth groove 124
Bottom) height h, it is necessary to be limited to less than or equal to denticle 122 top end face extremely
The height L of demarcation line 18.In other words, the position of demarcation line 18 must accord with
Close L >=h；I.e. denticle 122 top end face is to demarcation line 18 height L, it is necessary to big
In or equal to denticle 122 top end face to denticle 122 bottom (teeth groove 124 bottom)
Highly h.
And the spacing width a between the long end face in teeth portion 12 both sides, with base portion
Spacing width b between the 14 long end faces in both sides, it is necessary to meet b ＞ a；I.e. pedestal
Portion 14 width b need to be more than teeth portion 12 width a.
Being a preferred embodiment provided by the present invention therefore above-mentioned, tooth bar is each
Portion's component is introduced, the most again by assembling mode and the handling characteristics introduction of the present invention
As follows:
When after the hardened processing of the tooth bar of the present invention, when entering the refine stage, can
The abrasive wheel 1 of coefficient, abrasive wheel 24 is ground, with two sections by difference
Formula is ground, and respectively teeth portion 12 and base portion 14 is carried out refine grinding.Such as
Use the abrasive wheel 1 (as shown in Figure 3) of low grinding coefficient for base portion 14
Axially extend direction to be ground, in process of lapping, base portion 14 phase
Teeth portion 12 is designed because of the structure that inclined-plane 16 is new, and there is a potential difference (angle
Degree), therefore grind the abrasive wheel 1 of base portion 14, will not be with teeth portion 12 mistake
Many contacts, it is ensured that abrasive wheel 22 1 feeding strength is consistent, and maintain abrasive wheel
One 22 consistent coefficient of losses keep its circularity, make base portion 14 both sides end face water
Flat grinding precision improves.Grinding personnel, in process of lapping, more grind without worry
It is ground to there is higher hardness and be spaced interrupted teeth portion 12.
Otherwise, teeth portion 12 inclined-plane 16 is carried out refine and adds man-hour, pass through angle
Adjustment, the high abrasive wheel 24 grinding coefficient, for teeth portion 12 inclined-plane 16
When being ground, abrasive wheel 24 will not be formed too much with base portion 14 simultaneously
Contact, solves known technology with this and uses the abrasive wheel of single mill coefficient, with
Time the teeth portion 12 of different hardness coefficient carried out refine with base portion 14 add man-hour
The defect caused.
The above explanation, the only better embodiment of the present invention, meaning
In clear and definite inventive feature, it is not limited to the model of the embodiment of the present invention
Enclose, the equalization that those skilled in the art in the art are made according to the present invention
Change, and the change known to those skilled in that art, must belong to the present invention
The scope contained.
Claims (7)
1. a rack structure, it is characterised in that: include axially extended teeth portion and a base
Seat portion, teeth portion configures up and down with base portion and is connected, wherein,
Described teeth portion has the most alternately arranged several denticle and teeth groove, and teeth portion edge
The long end face in both sides in axially extending direction, from base portion be respectively symmetrically towards teeth portion
Top forms an inclined-plane with a θ angle, this inclined-plane and base portion joint, edge
The axially extending direction of base portion forms a demarcation line or transition wire because of angle.
Rack structure the most according to claim 1, it is characterised in that: wherein demarcation line
Position and each teeth groove bottom land position consistency.
Rack structure the most according to claim 1, it is characterised in that: wherein demarcation line
Position is less than the bottom land of each teeth groove.
Rack structure the most according to claim 1, it is characterised in that: wherein θ angle
Between 20 ° of ＞ θ ＞ 0 °.
Rack structure the most according to claim 1, it is characterised in that: wherein denticle top
End face to marginal distance L is more than or equal to denticle top end face at the bottom of teeth groove
Distance h of end, i.e. L >=h.
Rack structure the most according to claim 1, it is characterised in that: wherein base portion
Spacing width b between the long end face in both sides is more than between the long end face in teeth portion both sides
Spacing width a, i.e. base portion width b more than teeth portion width a.
Rack structure the most according to claim 1, it is characterised in that: wherein base portion
The both sides end face in axially extending direction, is respectively symmetrically and is provided with several installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073465.4A CN105987156A (en) | 2015-02-12 | 2015-02-12 | Rack structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073465.4A CN105987156A (en) | 2015-02-12 | 2015-02-12 | Rack structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105987156A true CN105987156A (en) | 2016-10-05 |
Family
ID=57041228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510073465.4A Pending CN105987156A (en) | 2015-02-12 | 2015-02-12 | Rack structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105987156A (en) |
Cited By (1)
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002178095A (en) * | 2000-12-18 | 2002-06-25 | High Frequency Heattreat Co Ltd | Manufacturing method of tubular member having rack |
| JP2005003144A (en) * | 2003-06-13 | 2005-01-06 | Koyo Seiko Co Ltd | Rack spindle and rack-and-pinion type steering system |
| CN202251816U (en) * | 2011-09-23 | 2012-05-30 | 常熟市华德粉末冶金有限公司 | Powder metallurgy gear |
| DE102012004082A1 (en) * | 2012-02-29 | 2013-08-29 | Createc Fischer & Co. Gmbh | Device for a vacuum and for transmitting or allowing a movement |
| WO2014061816A1 (en) * | 2012-10-15 | 2014-04-24 | Neturen Co., Ltd. | Hollow rack bar and method of manufacturing hollow rack bar |
-
2015
- 2015-02-12 CN CN201510073465.4A patent/CN105987156A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002178095A (en) * | 2000-12-18 | 2002-06-25 | High Frequency Heattreat Co Ltd | Manufacturing method of tubular member having rack |
| JP2005003144A (en) * | 2003-06-13 | 2005-01-06 | Koyo Seiko Co Ltd | Rack spindle and rack-and-pinion type steering system |
| CN202251816U (en) * | 2011-09-23 | 2012-05-30 | 常熟市华德粉末冶金有限公司 | Powder metallurgy gear |
| DE102012004082A1 (en) * | 2012-02-29 | 2013-08-29 | Createc Fischer & Co. Gmbh | Device for a vacuum and for transmitting or allowing a movement |
| WO2014061816A1 (en) * | 2012-10-15 | 2014-04-24 | Neturen Co., Ltd. | Hollow rack bar and method of manufacturing hollow rack bar |
Cited By (2)
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |