CN107628101B - Recirculating ball-type steering sector shaft and its processing method, diverter and vehicle - Google Patents
Recirculating ball-type steering sector shaft and its processing method, diverter and vehicle Download PDFInfo
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- CN107628101B CN107628101B CN201710617179.9A CN201710617179A CN107628101B CN 107628101 B CN107628101 B CN 107628101B CN 201710617179 A CN201710617179 A CN 201710617179A CN 107628101 B CN107628101 B CN 107628101B
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Abstract
This disclosure relates to a kind of recirculating ball-type steering sector shaft and its processing method, diverter and vehicle, the sector shaft includes sector shaft, the middle position gear teeth of sector shaft include a pair of projections on the flank profil face for the opposite sides for being formed in the middle position gear teeth, a pair of projections is symmetrical about the longitudinal center section of the middle position gear teeth, each boss include with the interlude that intersect of reference circle of each cross section on the tooth of sector shaft fan, and positioned at the interlude two sides up and down and on transverse tooth thickness direction no more than the side segment of interlude.A pair of projections is set on the middle position gear teeth, so that the recirculating ball-type steering can satisfy ideal steering sector shaft and steering nut fit clearance characteristic, to guarantee that gap of the diverter in automobile straight-line travelling is zero, promote the position sense of the bit positions of diverter, and simultaneously after steering wheel turns over certain angle, diverter has good steering reversal performance.
Description
Technical field
This disclosure relates to vehicle component, and in particular, to a kind of recirculating ball-type steering sector shaft including the circulation
The processing side of the diverter of ball-type diverter sector shaft, the vehicle including the diverter and recirculating ball-type steering sector shaft
Method.
Background technique
Automobile steering system be for changing or keep vehicle traveling direction specialized agency, diverter, steering wheel and turn
Automobile steering system is constituted to tubing string etc., and diverter is the most crucial component of automobile steering system.The transmission mechanism
By the conversion of diverter inner body, the rotation that driver acts on steering wheel is become to the swing of knuckle arm, thus band
Dynamic front-wheel steer.On the one hand it makes automobile that can in time change its traveling according to the Control requirements of driver in the process of moving
Direction；On the other hand it will ensure when the accidental impact and automobile transmitted by road surface unexpectedly deviates driving direction, can be with
Driving system cooperation is common to keep automobile to continue to stablize traveling.
The reciprocally swinging of the rotary motion transformation sector shaft of driver's wheels is realized fortune by automobile steering system
The transformation in dynamic direction, so that knuckle arm and wheel be driven to be turned to.In addition, the component is also responsible for the work of transmitting torque
Make, is the executing agency of diverter.
The quality of diverter meshing performance is very big on the influence of the stationarity of transmitting, and the size of back lash returns automobile
Positive performance and noise etc. all have a great impact.
As shown in Figure 1, for the back lash characteristic curve in the prior art for turning to sector shaft and standard rotation nut, this
Kind drive gap characteristic has the disadvantages that
1, when turning to sector shaft and too small steering nut fit clearance, although diverter is in automobile straight-line travelling position
Gap is smaller, but since tooth fan rack gear friction force square is larger, return performance declines when can make motor turning, and feel becomes when steering
Difference；
2, when turning to sector shaft and excessive steering nut fit clearance, although Hui Zhengneng when motor turning can be improved
Power, but will increase diverter simultaneously in the gap of automobile straight-line travelling position, make to turn to sluggishness, sensitivity decline is run at high speed
When even can generate noise.
Summary of the invention
Purpose of this disclosure is to provide a kind of recirculating ball-type steering sector shafts for being able to solve above-mentioned technical problem, packet
Include the diverter, the vehicle including the diverter and recirculating ball-type steering sector shaft of recirculating ball-type steering sector shaft
Processing method.
According to the disclosure in a first aspect, providing a kind of recirculating ball-type steering sector shaft, including sector shaft, wherein
The middle position gear teeth of the sector shaft include a pair of projections on the flank profil face for the opposite sides for being formed in the middle position gear teeth, and institute
The longitudinal center section that a pair of projections is stated about the middle position gear teeth is symmetrical, wherein each boss includes and the sector shaft
Tooth fan on each cross section reference circle intersection interlude, and positioned at the interlude two sides up and down and in transverse tooth thickness direction
The upper side segment no more than the interlude.
Optionally, the interlude is formed as the first inclined-plane, and the side segment includes positioned at the opposite of first inclined-plane
The top edge on the second inclined-plane and third inclined-plane of two sides, second inclined-plane from second inclined-plane is downward and is directed away from described
The direction in longitudinal center section extends, and the lower edge on first inclined-plane from second inclined-plane is downward and is directed away from described vertical
Extend to the direction of central cross-section, the lower edge on the third inclined-plane from first inclined-plane is downward and towards close to the longitudinal direction
The direction of central cross-section extends, and the acute angle formed between first inclined-plane and horizontal plane is greater than second inclined-plane and water
The acute angle formed between plane.
Optionally, the flank profil face of the opposite sides of the middle position gear teeth includes the tip cylinder positioned at the middle position gear teeth
The first involute teeth profile surface between second inclined-plane, and the second involute profile extended downwardly from the third inclined-plane
Face.
Optionally, the reference circle of each cross section of first inclined-plane and tooth fan is intersected in first inclined-plane
Center line along the vertical direction, and second inclined-plane and the third inclined-plane are symmetrical about the center line.
Optionally, the pair of boss includes first boss and second boss, the first boss and the second boss
It is respectively configured as in processing:
When 0 °≤| θ |≤β1When, ξ=ξmax；Work as β1≤|θ|≤β2When, When | θ |
≥β2When, ξ=0, wherein ξ is when processing boss (20), center cutter be directed away from the sector shaft center it is mobile away from
From, abbreviation addendum modification, θ is the corner of the sector shaft,
When processing the first boss and the second boss respectively using the cutter, when θ=0 °, the cutter
Suitable for being in contact with the center line of the first boss and the first inclined-plane of second boss, when the sector shaft is from 0 ° of inverse time
When needle turns over β 1, the cutter is suitable for being in contact with the handover line on the first inclined-plane of the first boss and the second inclined-plane, described
Cutter is suitable for being in contact with the handover line on the first inclined-plane of the second boss and third inclined-plane, when the sector shaft is from 1 inverse time of β
When needle goes to β 2, the cutter is suitable for connecting with the handover line on the second inclined-plane of the first boss and the first involute teeth profile surface
Touching, the cutter are suitable for being in contact with the handover line on the third inclined-plane of the second boss and the second involute teeth profile surface.
Optionally, ξmax=0.05mm~0.3mm, β1=10 °, β2=30 °.
Optionally, size range of the boss on the transverse tooth thickness direction of the middle position gear teeth between 0.02mm~
0.15mm。
Optionally, the tooth fan is the Thickened-tooth for the axial direction variation that transverse tooth thickness is fanned along the tooth.
According to the second aspect of the disclosure, provide a kind of diverter, the diverter include intermeshing steering nut and
Sector shaft is turned to, the sector shaft that turns to is the recirculating ball-type steering sector shaft that the disclosure provides.
According to the third aspect of the disclosure, a kind of vehicle is provided, which includes the diverter that the disclosure provides.
According to the fourth aspect of the disclosure, a kind of recirculating ball-type steering sector shaft of processing disclosure offer is provided
Processing method, the processing method include when processing the middle position gear teeth, to process the boss on the middle position gear teeth.
Optionally, using the middle position gear teeth described in generating method.
Through the above technical solutions, a pair of projections is arranged on the middle position gear teeth, so that sector shaft and mark that the disclosure provides
When quasi- steering nut engaged transmission, ideal steering sector shaft and steering nut fit clearance characteristic can satisfy, specifically,
When automobile straight-line travelling position, fit clearance zero, after leaving this position, which is gradually increased to the number of setting
Value promotes the position sense of the bit positions of diverter to guarantee that gap of the diverter in automobile straight-line travelling is zero, and same
When after steering wheel turns over certain angle, diverter have good steering reversal performance.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is the back lash characteristic curve in the prior art for turning to sector shaft and standard rotation nut；
Fig. 2 is the part knot of the recirculating ball-type steering sector shaft provided according to an illustrative embodiments of the disclosure
Structure schematic diagram and the partial enlarged view in the portion A and the portion B；
Fig. 3 is the middle position wheel of the recirculating ball-type steering sector shaft provided according to an illustrative embodiments of the disclosure
The tooth socket mesh schematic representation of tooth and standard rotation nut；
Fig. 4 is that the recirculating ball-type steering sector shaft provided according to an illustrative embodiments of the disclosure is using model
The functional image of the distance between cutter and sector shaft about the corner of sector shaft when being processed at method；
Fig. 5 is the engagement of the steering sector shaft and standard rotation nut that are provided according to an illustrative embodiments of the disclosure
Backlash characteristics curve.
Description of symbols
The position gear teeth in 1,2,3,4,5,6,7,8 handover 10 sector shaft 11 of line
111 first involute teeth profile surface, 112 second involute teeth profile surface
12 longitudinal center section, 20 boss 20A first boss
21 interlude of 20B second boss, 210 center line
22 222 second inclined-plane of side segment, 223 third inclined-plane
30 steering nuts
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " is usually phase
For the page of attached drawing, in addition, in the disclosure, " cross section " refers to the gear teeth end for being parallel to the position gear teeth in this
The plane in face, " longitudinal section " refer to the plane in the transverse tooth thickness direction for being parallel to the middle position gear teeth and the high direction of tooth, and with " cross section "
It is mutually perpendicular to.
As shown in Figures 2 and 3, the disclosure provides a kind of recirculating ball-type steering sector shaft, including sector shaft 10,
In, the middle position gear teeth 11 of sector shaft 10 include a pair of projections 20 on the flank profil face for the opposite sides for being formed in the middle position gear teeth 11,
That is, a pair of projections 20 is to be respectively facing the bulge structure of the tooth socket protrusion of corresponding sector shaft 10, and a pair of projections 20 is closed
The longitudinal center sections 12 of the Yu Zhongwei gear teeth 11 is symmetrical, wherein each boss 20 include with it is each on the tooth of sector shaft 10 fan
Cross section reference circle intersection interlude 21, and positioned at the interlude 21 two sides up and down and be no more than on transverse tooth thickness direction
The side segment 22 of interlude 21.
It should be noted that in the disclosure, by sector shaft 10, by the odd number gear teeth, sequentially number is along clockwise direction
1,2 ... N (N is odd number) define the middle position gear teeth 11 that (N+1)/2 is the sector shaft.The usual sector shaft 10 includes 3 or 5
The gear teeth, when sector shaft is 3, position gear teeth 11 are the 2nd along clockwise direction in this, when sector shaft is 5, position in this
11, the gear teeth along clockwise direction the 3rd.
According to gear and rack gear engagement rule it is found that no matter the two is standard installation also criteria of right and wrong installation, gear compound graduation
Circle is overlapped with pitch circle forever.Therefore, when sector shaft and standard rotation the nut engaged transmission that the disclosure provides, each boss 20
Interlude 21 intersect with the pitch circle of each cross section on the tooth of sector shaft 10 fan.In this way, in assembly ball-and-nut steering
It, can be by the interlude 21 and tooth of the middle position gear teeth 11 (corner for defining sector shaft 10 at this time is 0 °) in bit positions when device
Gap control between the tooth socket being matched therewith on item is zero.As rotary teeth is fanned clockwise or counterclockwise
When axis 10, the disengaging of interlude 21 is engaged with rack gear, which gradually matches with the tooth socket on rack gear, due to side segment
22 on the transverse tooth thickness direction of the middle position gear teeth 11 be no more than the interlude 21, therefore in this meshed tooth socket of position gear teeth 11 it
Gap is gradually increased, until reaching proper engagement gap.
That is, can satisfy the ideal tooth that turns to when the sector shaft and standard rotation nut engaged transmission of disclosure offer and fan
Axis and steering nut fit clearance characteristic, specifically, at automobile straight-line travelling position, fit clearance zero leaves this position
It postpones, which is gradually increased to the numerical value of setting, thus guarantee that gap of the diverter in automobile straight-line travelling is zero,
The position sense of the bit positions of diverter is promoted, and simultaneously after steering wheel turns over certain angle, diverter has good turn
To return performance.
Wherein, in each illustrative embodiments of the disclosure, the interlude 21, the side segment 22 can be formed as straight
The shapes such as line, plane, curved surface process the boss for convenience, and in one exemplary embodiment, interlude 21 is formed as first
Inclined-plane, side segment 22 include the second inclined-plane 222 and third inclined-plane 223 of the opposite sides positioned at the first inclined-plane, the second inclined-plane 222
Top edge from the second inclined-plane 222 is downward and is directed away from the extension of the direction in longitudinal center section 12, and the first inclined-plane is oblique from second
The lower edge in face 222 is downward and is directed away from the extension of the direction in longitudinal center section 12, and third inclined-plane 223 is under the first inclined-plane
Edge extends downwards and towards the direction close to longitudinal center section 12, and the acute angle formed between the first inclined-plane and horizontal plane
Greater than the acute angle formed between the second inclined-plane 222 and horizontal plane.That is, the boss 30 is surrounded by three inclined-planes towards corresponding tooth socket
The bulge structure of protrusion is surrounded relative to the boss 30 by three curved surfaces, it is easier to fabricate.In addition, in other deformation sides
In formula, which is formed as the horn structure surrounded by above-mentioned second inclined-plane 222 and third inclined-plane 223, i.e., at this time second tiltedly
The handover line on face 222 and third inclined-plane 223 is as the interlude 21.Interlude 21 is formed as the boss on the first inclined-plane relative in
Between section 21 be formed as the boss of straight line, it is easier to control machining deviation, reduce the requirement on machining accuracy to boss, in addition vehicle exists
When running at high speed, it is easier to the stability of position in holding.
It in the disclosure, may include cycloid except being removed at boss on flank profil face of opposite sides of position gear teeth 11 in this
Face, arc surface or parabola face, in a kind of illustrative embodiments of the disclosure, the tooth of the opposite sides of the position gear teeth 11 in this
It may include involute face except being removed at boss in profile surface.Specifically, as shown in Fig. 2, the opposite sides of the middle position gear teeth 11
Flank profil face includes the first involute teeth profile surface 111 between the tip cylinder and the second inclined-plane of the middle position gear teeth 11, and
The the second involute teeth profile surface 112 extended downwardly from the third inclined-plane 223.
Left and right turn torque is symmetrical when further, to guarantee steering wheel rotation, promotes the steering feel of driver, such as schemes
Shown in 2, the reference circle of each cross section of the first inclined-plane and tooth fan is intersected in the center line along the vertical direction on the first inclined-plane
210, and the second inclined-plane 222 and third inclined-plane 223 are symmetrical about center line 210.Due to 223 He of third inclined-plane on the same boss
Second inclined-plane 222 is symmetrical about center line 210, and a pair of projections itself is symmetrical about longitudinal center section 12, therefore the left side
Second inclined-plane 222 of the third inclined-plane 223 of the boss 20 on side and the boss 20 on the right of this is parallel to each other, and the boss 20 on the left side
The second inclined-plane 222 and the third inclined-plane 223 of the boss 20 on the right of this be parallel to each other.Specifically, when sector shaft is from bit positions
When being rotated in the clockwise direction, the third inclined-plane 223 of the boss 20 on the left side in the longitudinal center section 12 start gradually with rack gear
Corresponding gear teeth meshing, at the same the boss 20 on the right in the longitudinal center section 12 the second inclined-plane 222 start gradually with tooth
The corresponding gear teeth meshing of item, when sector shaft rotates in the counterclockwise direction from bit positions, the left side in the longitudinal center section 12
Second inclined-plane 222 of the boss 20 on side starts gradually gear teeth meshing corresponding with rack gear, while the longitudinal center section 12
The third inclined-plane 223 of the boss 20 on the right starts gradually gear teeth meshing corresponding with rack gear and guarantees that direction is faced left by this method
When turning right dynamic, the steering force of steering wheel is equal, promotes the steering feel of driver.
The disclosure also provides a kind of processing method of recirculating ball-type steering sector shaft that the processing disclosure provides, and should add
When work method includes the work in-process position gear teeth, the boss is processed on the middle position gear teeth.Wherein, the tooth of the sector shaft fans other portions
Point processing method and the prior art it is identical, be well known to those skilled in the art, the disclosure does not repeat this.
In the disclosure, the middle position gear teeth can be processed by a variety of processing methods to fan with the tooth of boss, such as can be with
The middle position gear teeth of tooth fan are processed, by form cutting (also known as forming process) to guarantee that machining accuracy can be used in the disclosure
Generation method (also known as generating) processes the middle position gear teeth of tooth fan.
That is, using process except motion mode necessary to common sector shaft (such as may include cutting, transform into and into
To etc.), and according to the distance between cutter and sector shaft as shown in Figure 4 about the corner of the sector shaft functional image into
Addendum modification as defined in being added on the axis given, completes the machining continuously conjugated to sector shaft part corner, so that local radial
After the sector shaft of displacement is engaged with the basic rack of standard rotation nut, excellent Varied clearance as shown in Figure 5 can be obtained and passed
Move secondary back lash characteristic curve.
Specifically, a pair of projections 20 may include first boss 20A and second boss 20B, and first boss 20A and second is convex
Platform 20B is respectively configured as in processing:
As shown in figure 4, when 0 °≤| θ |≤β1When, ξ=ξmax, i.e. center cutter reaches maximum at a distance from sector shaft center
Value；Work as β1≤|θ|≤β2When,I.e. center cutter at a distance from sector shaft center with
The corner of sector shaft increases and linearly increases；When | θ | >=β2When, ξ=0, i.e. center cutter are at a distance from sector shaft center
The distance value normally engaged, wherein ξ is when processing the boss 20, and center cutter is directed away from the sector shaft center movement
Distance, abbreviation addendum modification, θ are the corner of the sector shaft,
When processing first boss 20A and second boss 20B respectively using cutter, when θ=0 °, cutter is suitable for and first
The center line 210 on the first inclined-plane of boss 20A and second boss 20B is in contact, when sector shaft turns over β from 0 ° counterclockwise1When, knife
Tool is suitable for being in contact with the handover line 1 on the first inclined-plane of first boss 20A and the second inclined-plane 222, and cutter is suitable for and second boss
The first inclined-plane of 20B and the handover line 7 on third inclined-plane 223 are in contact, when sector shaft is from β1β is gone to counterclockwise2When, cutter is suitable for
It is in contact with the handover line 2 on the second inclined-plane 222 of first boss 20A and the first involute teeth profile surface 111, cutter is suitable for and second
The third inclined-plane 223 of boss 20B and the handover line 8 of the second involute teeth profile surface 112 are in contact.
Since a pair of projections 20 is symmetrical about longitudinal center section 12, and the second inclined-plane 222 of each boss 20 and the
Three inclined-planes 223 are symmetrical about center line 210, therefore, when with the tool sharpening first boss 20A and second boss 20B, up time
It is similar that needle rotates the case where matching relationship between the sector shaft a pair of projections and cutter is with when above-mentioned rotate counterclockwise.Specifically
Ground, when sector shaft turns over β from 0 ° clockwise1When, which is suitable for the first inclined-plane and third inclined-plane 223 with first boss 20A
Handover line 3 be in contact, the cutter be suitable for connect with the handover line 6 on the first inclined-plane of second boss 20B and the second inclined-plane 222
Touching, when the sector shaft is from β1Move clockwise to β2When, cutter is suitable for third inclined-plane 223 and the second involute with first boss 20A
The handover line 4 in flank profil face 112 is in contact, the cutter be suitable for second inclined-plane 222 on the second inclined-plane 222 of second boss 20B and
The handover line 5 of first involute teeth wheel face 111 is in contact.
Wherein it should be noted that when sector shaft rotates clockwise, β1And β2It is defined as positive value, when tooth fan turns counterclockwise
When dynamic, β1And β2It is defined as negative value, and β1And β2Positive and negative values should not cause limitations on the claims, only illustrate
It is bright come regulation sector shaft a kind of rotation direction, its positive and negative values can also be defined with opposite mode.
Further, when processing the sector shaft with boss, the ξmax=0.05mm~0.3mm, β1=10 °, β2=
30°。
Radius due to the addendum modification relative to the reference circle of the middle position gear teeth 11 can be ignored, such as Fig. 3 institute
Show, at each position of the boss in the back lash S ' of the position gear teeth and rack gear=ζ .tan α, wherein α be sector shaft tooth fan
Pressure angle on reference circle, S1 are the transverse tooth thickness of the middle position gear teeth, and S2 is the space width of rack gear, then turn to sector shaft and standard rotation spiral shell
Female back lash S can be indicated with following characteristic equation:
S=S2-S1
=SStandard tooth socket+2ξmaxtanα-(SMaster gear+2ξ.tanα)
=2 (ξmax-ξ)tanα
Wherein, SStandard tooth socketIndicate the space width of standard rotation nut, SMaster gearIndicate the transverse tooth thickness of standard rotation sector shaft, the two
Numerical value is equal.
Fit clearance characteristic curve as shown in Figure 5 is drawn according to this feature equation, it is illustrated fans in tooth
The case where amount of becoming and gap change in continuity in the finite angle section of axis.As shown in Figure 5, diverter is in automobile linear rows
Fit clearance S value is minimum when sailing, and mechanical friction torque is maximum, improves the position sense of the bit positions of circulating ball steering system.
During motor turning, the fit clearance S value for turning to sector shaft and steering nut constantly becomes larger, and moment of friction also constantly subtracts
It is small, to realize lesser aligning torque, reach ideal drive gap characteristic.Further, since the rack gear of steering nut
In bit positions, there are certain engagement pre-fastening moments with the tooth fan of steering shaft, after the use, abrasion of significant period of time,
Diverter is still able to maintain lesser free clearance in bit positions.
To sum up, as shown in figure 4, in sector shaft process, basis of the center away from L between transmission cutter and sector shaft
On, increase cutter by knife distance, that is, increase addendum modification ξ, conjugate region beta1=± 10 °, conjugate region beta2=± 30 °.By this
After parameter optimization, the sector shaft of optimization can be the two of reference circle (pitch circle engaged with basic rack) part of the middle position gear teeth
Side respectively forms an above-mentioned boss.Further, it is passed due to the engagement of the rack gear of the gear teeth of steering shaft and steering nut to be accurate
Dynamic, to generate clamping stagnation when both avoiding relative motion, the structure of the boss should not be too big, in addition, for improve turn to sector shaft and
The structure of the matching property of steering nut, the boss should not be too small.To take into account above-mentioned both sides factor, the boss 20 is in middle position
Size range on the transverse tooth thickness direction of the gear teeth 11 is between 0.02mm~0.15mm.In this way, can guarantee simultaneously turn to sector shaft and
Steering nut engagement is smooth, and the drive gap characteristic of the two can satisfy above-mentioned ideal back lash characteristic requirements, improves
Turn to the matching property of sector shaft and steering nut.
In each illustrative embodiments of the disclosure, tooth fan is that transverse tooth thickness thickens along what the axial direction that the tooth is fanned changed
Tooth fan.That is, the sector shaft of the recirculating ball-type steering uses the beveloid gear of direct tooth type, and the beveloid gear is not only along axial direction
Each end section (i.e. cross section) on tooth form there is different modification coefficients, and the beveloid gear is in local position radially
Setting tooth form (i.e. at lug boss position) also has different modification coefficients.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (12)
1. a kind of recirculating ball-type steering sector shaft, including sector shaft (10), which is characterized in that in the sector shaft (10)
The position gear teeth (11) include a pair of projections (20) on the flank profil face for the opposite sides for being formed in the middle position gear teeth (11), and described
A pair of projections (20) is symmetrical about the longitudinal center section (12) of the middle position gear teeth (11), wherein each boss (20) includes
The interlude (21) intersected with the reference circle of each cross section on the tooth of the sector shaft (10) fan, and it is located at the interlude
(21) two sides up and down and the side segment (22) for being no more than the interlude (21) on transverse tooth thickness direction.
2. recirculating ball-type steering sector shaft according to claim 1, which is characterized in that the interlude (21) is formed
For the first inclined-plane, the side segment (22) includes the second inclined-plane (222) and third of the opposite sides positioned at first inclined-plane
Inclined-plane (223), second inclined-plane (222) downwards and are directed away from the longitudinal direction from the top edge of second inclined-plane (222)
The direction of central cross-section (12) extends, and the lower edge of first inclined-plane from second inclined-plane (222) is downward and is directed away from
The direction of the longitudinal center section (12) extends, the third inclined-plane (223) from the lower edge on first inclined-plane downwards and
Extend towards the direction close to the longitudinal center section (12), and the acute angle formed between first inclined-plane and horizontal plane
Greater than the acute angle formed between second inclined-plane (222) and horizontal plane.
3. recirculating ball-type steering sector shaft according to claim 2, which is characterized in that the middle position gear teeth (11)
The flank profil face of opposite sides includes first between the tip cylinder and second inclined-plane of the middle position gear teeth (11)
Involute teeth profile surface (111), and the second involute teeth profile surface (112) extended downwardly from the third inclined-plane (223).
4. recirculating ball-type steering sector shaft according to claim 3, which is characterized in that first inclined-plane with it is described
The reference circle of each cross section of tooth fan is intersected in the center line (210) along the vertical direction on first inclined-plane, and described the
Two inclined-planes (222) and the third inclined-plane (223) are symmetrical about the center line (210).
5. recirculating ball-type steering sector shaft according to claim 4, which is characterized in that the pair of boss (20) packet
First boss (20A) and second boss (20B) are included, the first boss (20A) and the second boss (20B) are respectively configured as
In processing:
When 0 °≤| θ |≤β1When, ξ=ξmax；Work as β1≤|θ|≤β2When, When | θ | >=β2
When, ξ=0, wherein ξ is when processing boss (20), and center cutter is directed away from the mobile distance in the sector shaft center, letter
Claiming addendum modification, θ is the corner of the sector shaft,
When processing the first boss (20A) and the second boss (20B) respectively using the cutter, when θ=0 °, institute
Cutter is stated to be suitable for connecting with the center line (210) on the first inclined-plane of the first boss (20A) and second boss (20B)
Touching, when the sector shaft turns over β from 0 ° counterclockwise1When, the cutter be suitable for the first inclined-plane of the first boss (20A) and
The handover line (1) on the second inclined-plane (222) is in contact, and the cutter is suitable for and the first inclined-plane of the second boss (20B) and the
The handover line (7) on three inclined-planes (223) is in contact, when the sector shaft is from β1β is gone to counterclockwise2When, the cutter be suitable for it is described
The second inclined-plane (222) of first boss (20A) and the handover line (2) of the first involute teeth profile surface (111) are in contact, the cutter
Suitable for connecting with the handover line (8) on the third inclined-plane (223) of the second boss (20B) and the second involute teeth profile surface (112)
Touching.
6. recirculating ball-type steering sector shaft according to claim 5, which is characterized in that ξmax=0.05mm~
0.3mm, β1=10 °, β2=30 °.
7. recirculating ball-type steering sector shaft according to claim 1, which is characterized in that the boss (20) is described
Size range on the transverse tooth thickness direction of the middle position gear teeth (11) is between 0.02mm~0.15mm.
8. recirculating ball-type steering sector shaft described in any one of -7 according to claim 1, which is characterized in that the tooth fan
For the Thickened-tooth for the axial direction variation that transverse tooth thickness is fanned along the tooth.
9. a kind of diverter, including intermeshing steering nut (30) and steering sector shaft, which is characterized in that the steering tooth
Fanning axis is according to recirculating ball-type steering sector shaft of any of claims 1-8.
10. a kind of vehicle, which is characterized in that the vehicle includes diverter according to claim 9.
11. a kind of processing side for processing recirculating ball-type steering sector shaft described in any one of -8 according to claim 1
Method, which is characterized in that include when processing the middle position gear teeth, to process the boss on the middle position gear teeth.
12. the processing method of recirculating ball-type steering sector shaft according to claim 11, which is characterized in that use model
The middle position gear teeth are processed at method.
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| CN111895068A (en) * | 2020-08-17 | 2020-11-06 | 东科克诺尔商用车制动技术有限公司 | Rack and pinion pair with variable transmission clearance characteristic and automobile steering gear |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704133A (en) * | 2009-11-19 | 2010-05-12 | 杭州世宝汽车方向机有限公司 | Manufacturing method of rocker shaft gear sector of negative ratio redirector |
| CN203306085U (en) * | 2013-06-08 | 2013-11-27 | 杭州世宝汽车方向机有限公司 | Tooth form of circulating ball power steering gear rack piston |
| JP2014159263A (en) * | 2012-06-27 | 2014-09-04 | Nsk Ltd | Rack bush for rack pinion type steering device |
| CN104401387A (en) * | 2014-10-29 | 2015-03-11 | 杭州世宝汽车方向机有限公司 | Variable ratio rack and power steering gear |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979405A (en) * | 1987-02-14 | 1990-12-25 | Zahnradfabrik Friedrichshafen, Ag. | Rack-type steering gear, particularly for use in motor vehicles |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704133A (en) * | 2009-11-19 | 2010-05-12 | 杭州世宝汽车方向机有限公司 | Manufacturing method of rocker shaft gear sector of negative ratio redirector |
| JP2014159263A (en) * | 2012-06-27 | 2014-09-04 | Nsk Ltd | Rack bush for rack pinion type steering device |
| CN203306085U (en) * | 2013-06-08 | 2013-11-27 | 杭州世宝汽车方向机有限公司 | Tooth form of circulating ball power steering gear rack piston |
| CN104401387A (en) * | 2014-10-29 | 2015-03-11 | 杭州世宝汽车方向机有限公司 | Variable ratio rack and power steering gear |
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