CN208682912U - The rack gear positioning device of electric boosting steering system - Google Patents
The rack gear positioning device of electric boosting steering system Download PDFInfo
- Publication number
- CN208682912U CN208682912U CN201821470937.5U CN201821470937U CN208682912U CN 208682912 U CN208682912 U CN 208682912U CN 201821470937 U CN201821470937 U CN 201821470937U CN 208682912 U CN208682912 U CN 208682912U
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- China
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- rack gear
- positioning mechanism
- machine shell
- turning machine
- rack
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Abstract
The utility model discloses a kind of rack gear positioning devices of electric boosting steering system, including in the first positioning mechanism that one end of rack gear positions rack gear, the second positioning mechanism positioned for the other end in rack gear to rack gear and third positioning mechanism for being positioned at the position between rack gear both ends to rack gear, third positioning mechanism to be between the first positioning mechanism and the second positioning mechanism.The rack gear positioning device of the utility model electric boosting steering system, pass through the cooperation of the first positioning mechanism, the second positioning mechanism and third positioning mechanism, the variation of radial position and angle during rack work can be greatly reduced, improve rack gear locating effect, guarantee that engagement is good between rack gear and power-assisted gear, reaches the stable effect of power-assisted effect；The Caton for reducing steering wheel improves the comfort level of driver, reduces noise and friction, extends the service life of electric boosting steering system.
Description
Technical field
The utility model belongs to wheel steering system technical field, specifically, electronic helping the utility model relates to a kind of
The rack gear positioning device of power steering system.
Background technique
The rack gear positioning method of electric boosting steering system is rack gear one end and bushing inner hole clearance fit, the rack gear other end
It provides radial elastic by support base to limit, in such location structure, the radially adjustable adjusting range of bushing positioning end is small, rack support seat
The radially adjustable adjusting range of positioning end is big, and the positioning method at rack gear both ends is different, and radial force is uneven, and rack gear is caused to be axially moved
While have biggish radial displacement, cause bushing inner ring to be prone to wear, reduce the service life, increase noise.
Rack support seat used at present, material are powder metallurgy, and rack support seat operative end surface withstands rack gear, another
Holddown spring is installed in the cylinder shape groove at end, is positioned with a shape for hat screw, shape for hat screw after the assembly is completed, need to adjust screw
Rigging position adjust the deformation quantity of holddown spring, and then the position of adjusting gear rack, process is cumbersome and is difficult to ensure product
Consistency.
Whole system is under larger external impacts or vibration, and in radial direction biggish change in location can occur for rack gear, together
When angle can have greatly changed, and then influence engaging for rack gear and power-assisted pinion gear and output shaft gear, influence driver
The power-assisted effect of feel and force aid system.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
For a kind of rack gear positioning device of electric boosting steering system, it is therefore an objective to improve rack gear locating effect.
To achieve the goals above, the technical solution that the utility model is taken are as follows: the rack gear of electric boosting steering system is fixed
Position device, including for being positioned in one end of rack gear to rack gear the first positioning mechanism, for the other end pair in rack gear
The second positioning mechanism that rack gear is positioned and the third for being positioned at the position between rack gear both ends to rack gear are determined
Position mechanism, third positioning mechanism is between the first positioning mechanism and the second positioning mechanism.
The rack gear is movably to be set in turning machine shell, and first positioning mechanism is to be set to steering casing
The first bushing in body, the first bushing are sheathed on rack gear.
First bushing and the turning machine shell are interference fit, and the first bushing is located at the end of turning machine shell.
The rack gear is movably to be set in turning machine shell, and second positioning mechanism is to be set to steering casing
The second bushing in body, the second bushing are sheathed on rack gear.
Second bushing and the turning machine shell are interference fit, and the second bushing is located at the end of turning machine shell.
The third positioning mechanism includes rack support seat, holddown plate and is set to rack support seat and holddown plate
Between and for rack support seat apply elastic acting force holddown spring.
The rack gear is movably to be set in turning machine shell, and turning machine shell, which has, accommodates the rack support seat
Accommodating cavity, the holddown plate connect with turning machine shell.
The holddown plate is mounted on the turning machine shell by bolt, and holddown plate is located at the outer of turning machine shell
Side.
The third positioning mechanism further includes the sealing ring being sheathed on the rack support seat.
Axial arrangement of the sealing ring on the rack support seat along rack support seat is one or more.
The rack gear positioning device of the utility model electric boosting steering system passes through the first positioning mechanism, the second localization machine
The cooperation of structure and third positioning mechanism can greatly reduce the variation of radial position and angle during rack work, improve tooth
Locating effect guarantees that engagement is good between rack gear and power-assisted gear, reaches the stable effect of power-assisted effect；Reduce steering wheel
Caton improves the comfort level of driver, reduces noise and friction, extends the service life of electric boosting steering system.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the structural schematic diagram of the rack gear positioning device of the utility model electric boosting steering system；
Fig. 2 is the structural schematic diagram of the first bushing and the second bushing；
Fig. 3 is the decomposition diagram of third positioning mechanism；
Fig. 4 is the cross-sectional view of third positioning mechanism；
Fig. 5 is the structural schematic diagram of rack support seat；
In the figure, it is marked as 1, motor；2, deceleration mechanism；3, the first bushing；4, the second bushing；5, third positioning mechanism；
501, rack support seat；502, holddown spring；503, holddown plate；504, bolt；505, sealing ring；506, accommodation groove；507,
Working face；508, spring installation cavity；6, input shaft；7, torque sensor；8, turning machine shell；9, dust cover；10, rack gear.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art to the design of the utility model, technical solution have it is more complete, accurate and
Deep understanding, and facilitate its implementation.
It should be noted that " first ", " second " and " third " does not represent knot in embodiment disclosed below
Structure and/or absolute differentiation relationship functionally, do not represent the successive sequence that executes yet, and merely for convenience of description.
As shown in Figures 1 to 5, the utility model provides a kind of rack gear positioning device of electric boosting steering system, packet
It includes the first positioning mechanism for being positioned in one end of rack gear to rack gear, rack gear is determined for the other end in rack gear
The second positioning mechanism and third positioning mechanism 5 for being positioned at the position between rack gear both ends to rack gear of position, the
Three positioning mechanisms 5 are between the first positioning mechanism and the second positioning mechanism.
Specifically, as shown in figures 1 and 3, electric boosting steering system includes motor 1, deceleration mechanism 2, rack gear and turns
To casing body 8, rack gear is movably to be set in turning machine shell 8, and turning machine shell 8 is both ends open and inner hollow
Structure, deceleration mechanism 2 are connect with motor 1 and rack gear, and deceleration mechanism 2 is used to the rotary force that motor 1 generates being transferred to rack gear, are subtracted
The power output part of fast mechanism 2 is the power-assisted gear being meshed with rack gear, and power-assisted gear driving rack is in turning machine shell 8
Linear reciprocating motion is done along axial direction, power-assisted gear is inserted into the inside of turning machine shell 8, and motor 1 is located at the outer of turning machine shell 8
Portion.One end on the length direction of turning machine shell 8 is arranged in first positioning mechanism, and the second positioning mechanism is set to steering casing
The other end on the length direction of body 8, third positioning mechanism 5 is set on turning machine shell 8 and the position of third positioning mechanism 5
Between the both ends of turning machine shell 8, by the cooperation of the first positioning mechanism, the second positioning mechanism and third positioning mechanism 5,
The variation of radial position and angle during rack work can be greatly reduced, improve rack gear locating effect, guarantee rack gear and helped
It is engaged well between powershift gear, reaches the stable effect of power-assisted effect；The Caton for reducing steering wheel, improves the comfortable of driver
Degree reduces noise and friction, extends the service life of electric boosting steering system.
As shown in Figure 1 to Figure 3, the first positioning mechanism is the first bushing 3 being set in turning machine shell 8, the first bushing 3
It is sheathed on rack gear.Preferably, the first bushing 3 and turning machine shell 8 are interference fit, the first bushing 3 is located at turning machine
The end of shell 8.First bushing 3 is cirque structure, and the end of rack gear is extend out to across the end of the first bushing 3 and rack gear to be turned
To the outside of casing body 8.First bushing 3 is mounted in the inner chamber body of turning machine shell 8 in a manner of press fitting, the first bushing 3
Outer wall and the inner cavity of turning machine shell 8 fixation of bushing, the periphery of rack gear and first are realized by way of interference fit
There is gap between the inner headed face of bushing 3 and the gap is smaller, realized and determined by clearance fit between rack gear and the first bushing 3
It is movable to guarantee that rack gear is radially only capable of within the scope of very small variable-angle for position.
As shown in Figure 1 to Figure 3, the second positioning mechanism is the second bushing 4 being set in turning machine shell 8, the second bushing 4
It is sheathed on rack gear.Preferably, the second bushing 4 and turning machine shell 8 are interference fit, the second bushing 4 is located at turning machine
The end of shell 8, the first bushing 3 and the second bushing 4 are located at the opposite end of turning machine shell 8.First bushing 3 and the second bushing
4 structure is identical, and the second bushing 4 is cirque structure, and the end of rack gear is extend out to across the end of the second bushing 4 and rack gear to be turned
To the outside of casing body 8.Second bushing 4 is mounted in the inner chamber body of turning machine shell 8 in a manner of press fitting, the second bushing 4
Outer wall and the inner cavity of turning machine shell 8 fixation of bushing, the periphery of rack gear and second are realized by way of interference fit
There is gap between the inner headed face of bushing 4 and the gap is smaller, realized and determined by clearance fit between rack gear and the second bushing 4
It is movable to guarantee that rack gear is radially only capable of within the scope of very small variable-angle for position.
As shown in Figure 1, in the axial direction of turning machine shell 8, the first positioning mechanism, third positioning mechanism 5 and the second positioning
Mechanism is to be sequentially arranged, and third positioning mechanism 5 is between the first positioning mechanism and the second positioning mechanism and third positioning mechanism 5
The distance between first positioning mechanism is less than the distance between third positioning mechanism 5 and the second positioning mechanism, the utility model
Rack gear positioning device be realized respectively with the inner hole clearance fit of two bushings by rack gear both ends, and by two bushings it
Between the radial displacement compensation that is assisted of third positioning mechanism 5, third positioning mechanism 5 is used to provide bullet radially to rack gear
Property supporting role, give rack gear corresponding angle change compensation, further decrease rack gear in the variation of radial position and angle, subtract
The abrasion of small bushing inner wall reduces noise, prolongs the service life.As shown in Figures 3 to 5, third positioning mechanism 5 includes rack gear branch
It supports seat 501, holddown plate 503 and is set between rack support seat 501 and holddown plate 503 and is used for rack support seat
501 apply the holddown spring 502 of elastic acting force.Turning machine shell 8 has the accommodating cavity for accommodating rack support seat 501, the appearance
It is to accommodate on the side wall of turning machine shell 8 along the setting that extends radially through of turning machine shell 8 that set chamber, which be circular cavity and accommodating cavity,
Chamber is located between the both ends of turning machine shell 8.Holddown plate 503, holddown spring 502, rack support seat 501 and rack gear are along appearance
The axial direction for setting chamber does not know that rack support seat 501 is cylindrical body, the overall diameter of rack support seat 501 and the diameter of accommodating cavity successively
Size is identical, and rack support seat 501 is movably to be set in the accommodating cavity of turning machine shell 8, holddown plate 503 and steering
The connection of casing body 8 and holddown plate 503 with turning machine shell 8 keeps relatively fixed.
As shown in Figures 3 to 5, elastic element is cylindrically coiled spring and is compressed spring, elastic element and rack support
Seat 501 is coaxial arrangement, and elastic element is clipped between holddown plate 503 and rack support seat 501, the both ends difference of elastic element
Holddown plate 503 and rack support seat 501 are contradicted, elastic element applies along axial pressure rack support seat 501, it is ensured that tooth
The back lash of wheel rack gear meets the requirements, and improves reliability.The overall diameter of elastic element is less than the outer straight of rack support seat 501
Diameter, rack support seat 501 have allow elastic element be embedded in spring installation cavity 508, the spring installation cavity 508 be circular cavity and
Spring installation cavity 508 be from the end face center for facing holddown plate 503 of rack support seat 501 along rack support seat
The diameter of the cavity that 501 internal recess for being axially facing rack support seat 501 is formed, the spring installation cavity 508 is slightly larger than bullet
Property element overall diameter, spring installation cavity 508 plays positioning action to elastic element, elastic element avoided to bend, and improves
Reliability and stability.
As shown in Figure 3 and Figure 4, holddown plate 503 is mounted on turning machine shell 8 by bolt 504, holddown plate 503
Positioned at the outside of turning machine shell 8, holddown plate 503 has the through-hole for allowing bolt 504 to pass through, and turning machine shell 8, which has, allows spiral shell
The internal thread hole that bolt 504 is embedded in.Preferably, holddown plate 503 is to be mounted on turning machine shell 8 by two bolts 504
On, the axis of bolt 504 is parallel with the axis of rack support seat 501, and two bolts 504 are with the axis of rack support seat 501
Line is that center line is uniformly distributed circumferentially, and the angle between two bolts 504 is 180 degree.Compress end cap and turning machine shell 8 it
Between it is fixed by two bolts 504, guarantee the elastic deformation having the same of holddown spring 502, it is not necessary to carry out holddown spring 502 again
Elastically-deformable debugging simplifies process route, better ensures that homogeneity of product.
As shown in Figures 3 to 5, third positioning mechanism 5 further includes the sealing ring 505 being sheathed on rack support seat 501, close
Seal 505 is clipped between rack support seat 501 and the inner wall of accommodating cavity.Sealing ring 505 is at least arranged one, works as sealing ring
When 505 settings are multiple, axial direction of multiple sealing rings 505 on rack support seat 501 along rack support seat 501 is sequentially arranged.Tooth
The periphery of support base 501 is equipped with the accommodation groove 506 for accommodating sealing ring 505, and accommodation groove 506 is in rack support seat 501
Periphery on along the annular groove entirely circumferentially extended, sealing ring 505 is O-ring.The setting of sealing ring 505 can avoid turning
Oil liquid leakage into casing body 8.
As shown in Figures 3 to 5, in the present embodiment, sealing ring 505 is arranged two, and accommodation groove 506 is also provided with two, respectively
One sealing ring 505 is installed respectively in a accommodation groove 506.
As shown in Figures 3 to 5, rack support seat 501 has working face 507, which is arc surface, working face
507 are located at one end of rack support seat 501, and spring installation cavity 508 is located at the other end of rack support seat 501, working face 507 and
Rack gear is coaxial, and on rack support seat 501, one end where working face 507 forms the circular groove for allowing rack gear to be embedded in.Work
It is coated with polytetrafluoroethylene (PTFE) on face 507, forms coating on working face 507, the outer circle face contact of the coating and rack gear is resistance to improve
Mill property, prolongs the service life.Preferably, material used in rack support seat 501 is aluminium alloy, the big, weight with intensity
Light advantage.
The utility model is exemplarily described in conjunction with attached drawing above.Obviously, the utility model implements not
It is limited by aforesaid way.As long as the various unsubstantialities that the method concept and technical solution that use the utility model carry out
Improvement；Or it is not improved, the above-mentioned conception and technical scheme of the utility model are directly applied into other occasions, at this
Within the protection scope of utility model.
Claims (10)
1. the rack gear positioning device of electric boosting steering system, it is characterised in that: including for one end of rack gear to rack gear into
First positioning mechanism of row positioning, the second positioning mechanism that rack gear is positioned for the other end in rack gear and in tooth
The third positioning mechanism that rack gear is positioned at position between both ends, third positioning mechanism be located at the first positioning mechanism and
Between second positioning mechanism.
2. the rack gear positioning device of electric boosting steering system according to claim 1, it is characterised in that: the rack gear is
Movably it is set in turning machine shell, first positioning mechanism is the first bushing being set in turning machine shell, the
One bushing is sheathed on rack gear.
3. the rack gear positioning device of electric boosting steering system according to claim 2, it is characterised in that: first lining
Set is interference fit with the turning machine shell, and the first bushing is located at the end of turning machine shell.
4. the rack gear positioning device of electric boosting steering system according to any one of claims 1 to 3, it is characterised in that: institute
Stating rack gear is movably to be set in turning machine shell, and second positioning mechanism is second be set in turning machine shell
Bushing, the second bushing are sheathed on rack gear.
5. the rack gear positioning device of electric boosting steering system according to claim 4, it is characterised in that: second lining
Set is interference fit with the turning machine shell, and the second bushing is located at the end of turning machine shell.
6. the rack gear positioning device of electric boosting steering system according to claim 4, it is characterised in that: the third is fixed
Position mechanism includes rack support seat, holddown plate and is set between rack support seat and holddown plate and is used for rack gear branch
Support the holddown spring that seat applies elastic acting force.
7. the rack gear positioning device of electric boosting steering system according to claim 6, it is characterised in that: the rack gear is
It is movably set in turning machine shell, turning machine shell has the accommodating cavity for accommodating the rack support seat, the compression
Cover board is connect with turning machine shell.
8. the rack gear positioning device of electric boosting steering system according to claim 7, it is characterised in that: the clamping cap
Plate is mounted on the turning machine shell by bolt, and holddown plate is located at the outside of turning machine shell.
9. the rack gear positioning device of electric boosting steering system according to claim 6, it is characterised in that: the third is fixed
Position mechanism further includes the sealing ring being sheathed on the rack support seat.
10. the rack gear positioning device of electric boosting steering system according to claim 9, it is characterised in that: the sealing
Axial arrangement of the circle on the rack support seat along rack support seat is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470937.5U CN208682912U (en) | 2018-09-10 | 2018-09-10 | The rack gear positioning device of electric boosting steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821470937.5U CN208682912U (en) | 2018-09-10 | 2018-09-10 | The rack gear positioning device of electric boosting steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208682912U true CN208682912U (en) | 2019-04-02 |
Family
ID=65888735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821470937.5U Active CN208682912U (en) | 2018-09-10 | 2018-09-10 | The rack gear positioning device of electric boosting steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208682912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109305218A (en) * | 2018-09-10 | 2019-02-05 | 安徽德孚转向系统股份有限公司 | The rack gear positioning device of electric boosting steering system |
-
2018
- 2018-09-10 CN CN201821470937.5U patent/CN208682912U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109305218A (en) * | 2018-09-10 | 2019-02-05 | 安徽德孚转向系统股份有限公司 | The rack gear positioning device of electric boosting steering system |
| CN109305218B (en) * | 2018-09-10 | 2024-04-26 | 安徽德孚转向系统股份有限公司 | Rack positioning device of electric power steering system |
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