CN102829154A - Gear rack bushing - Google Patents
Gear rack bushing Download PDFInfo
- Publication number
- CN102829154A CN102829154A CN2012103518992A CN201210351899A CN102829154A CN 102829154 A CN102829154 A CN 102829154A CN 2012103518992 A CN2012103518992 A CN 2012103518992A CN 201210351899 A CN201210351899 A CN 201210351899A CN 102829154 A CN102829154 A CN 102829154A
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- China
- Prior art keywords
- bushing
- projected parts
- strip projected
- bush
- cutting plane
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention relates to a gear rack bushing, comprising a bushing body, wherein the bushing body is made of polyurethane through injection molding; the circumference of the inner wall of the bushing body is provided with at least two strip protrusions which stretch axially; the strip protrusions are provided with a plurality of perforated grooves; the outer wall of the bushing body is provided with a cutting plane corresponding to the strip protrusions; and the cutting plane is provided with damping protrusions which stretch axially. The gear rack bushing disclosed by the invention has good lubricity and good abrasive resistance, and can effectively avoid the phenomena that a steering gear sounds abnormally due to an excessive fit clearance between a gear rack and the bushing, and that a steering wheel is possible to be returned too fast; and the machining process of the gear rack bushing is rather simple.
Description
Technical field
The present invention relates to the automobile steering device accessory, be specifically related to a kind of rack bush.
Background technique
The rack bush of commutator be used for supporting, the tooth bar in the stationary deflector, prevent tooth bar distortion in commutator, break-in and then the fault of abnormal sound, oil sealing leakage of oil occurs turning to.The rack bush interference is fixed in the steering gear housing, and when handling commutator, tooth bar axially moves back and forth in lining.After service time was long, along with the generation of wearing and tearing, the gap between tooth bar and lining was increasing, causes the commutator abnormal sound, and just too fast phenomenon possibly appear back in steering wheel, was unfavorable for that the driver controls steering wheel, had serious traffic safety hidden danger.
As shown in Figure 1, existing rack bush is made up of inner ring that sets gradually from the inside to surface 1 and outer ring 2, and inner ring 1 combines as a whole with outer ring 2 sulfurations; Wherein, inner ring 1 adopts powder metallurgical, and nitrile butadiene rubber is adopted in outer ring 2; This rack bush can satisfy the requirement of wear resistance basically, but processing technology is complicated.
Summary of the invention
The purpose of this invention is to provide a kind of rack bush,, avoid commutator abnormal sound and steering wheel just too fast problem possibly occur back, and processing technology is simpler to improve the wear resistance of rack bush.
Rack bush of the present invention; Comprise bush body; Key is: said bush body is injection molded by polyurethane, on the circumference of bush body inwall, is provided with at least two axially extended strip projected parts, offers some poroid grooves on the said strip projected parts; On the outer wall of bush body, be provided with and the corresponding cutting plane of said strip projected parts, it is protruding that said cutting plane is provided with axially extended vibration damping.
For ease of exhaust, have axially extended air vent on the inwall of said bush body, and air vent is between said strip projected parts.
Said strip projected parts is three, and the width of strip projected parts is beneficial to rack bush and is out of shape to the circle outside sweep in stressed back less than the width of said cutting plane.
The outer wall of said bush body is provided with axial tooth, and this axial tooth reduces the resistance when clamp-oning housing between said cutting plane.
Beneficial effect of the present invention: because rack bush adopts polyurethane material directly injection molded, polyurethane material has lubricity and wear resistance preferably, so rack bush has lubricity and wear resistance preferably, and processing technology is fairly simple.In addition, owing to be provided with strip projected parts at the lining inwall, the tooth bar cylindrical end is supported by strip projected parts; And cutting plane is set at the lining outer wall at place, strip projected parts place, make this place's jacket wall attenuate, and produce the space between the steering gear housing; Thereby the resiliently deformable that caused by convexity can take place; In the process that wearing and tearing take place, the jacket wall of resiliently deformable automatically resets, and has avoided cooperating between tooth bar and the lining harmful effect to the commutator usability of tension or excesssive gap.Area of contact with between hour rack and the lining greatly reduces, and the resistance that tooth bar is moved also reduces relatively.Also be provided with the damping convexity on the cutting plane, have damping effect preferably, improved the travelling comfort of automobile.
Description of drawings
Fig. 1 is the structural representation of existing rack bush.
Fig. 2 is a structural representation of the present invention.
Embodiment
Combine accompanying drawing that the present invention is done further explain at present:
Rack bush as shown in Figure 1, bush body are mainly injection molded by polyurethane, and polyurethane material has lubricity and wear resistance preferably.On the circumference of bush body inwall, be evenly equipped with three strip projected parts 3; On strip projected parts 3, offer the poroid groove 8 that is uniformly distributed with; On the outer wall of bush body, be provided with and axially extended strip projected parts 3 corresponding cutting planes 5; And the width of cutting plane 5 is beneficial to its stressed back to the distortion of circle outside sweep greater than the width of strip projected parts 3.Cutting plane 5 upper edges are axially arranged with vibration damping convexity 4, and the outer surface of vibration damping protruding 4 is streamlined.On the inwall of bush body, have axially extended air vent 7, and air vent is provided with axial tooth 6 between strip projected parts 3 on the outer wall of bush body, and this axial tooth 6 reduces the resistance when clamp-oning housing between cutting plane 5.
Commutator is coated with an amount of lubricating grease in the poroid groove 8 of the bush body of this rack bush in assembly process; In the poroid groove 8 of assurance lining enough lubricating grease is arranged; Make rack bush keep for a long time lubricated, again that other component assemblings such as tooth bar are complete; Simultaneously, round degree is approximate in three strip projected parts 3 that are uniformly distributed with on the bush body inwall and the bush body, can compensate the gap that wearing and tearing produce between tooth bar and the lining automatically, makes the two remain proper fit.
The quantity of strip projected parts 3, cutting plane 5 and vibration damping protruding 4 can be provided with as required.
Claims (4)
1. rack bush; Comprise bush body; It is characterized in that: said bush body is injection molded by polyurethane, on the circumference of bush body inwall, is provided with at least two strip projected parts (3) that extend vertically, offers some poroid grooves (8) on the said strip projected parts (3); On the outer wall of bush body, be provided with and the corresponding cutting plane of said strip projected parts (3) (5), said cutting plane (5) is provided with axially extended vibration damping protruding (4).
2. rack bush according to claim 1 is characterized in that: have axially extended air vent (7) on the inwall of said bush body, and air vent (7) is positioned between the said strip projected parts (3).
3. rack bush according to claim 1 and 2 is characterized in that: said strip projected parts (3) is three, and the width of strip projected parts (3) is less than the width of cutting plane (5).
4. rack bush according to claim 1 and 2 is characterized in that: the outer wall of said bush body is provided with axial tooth (6), and this axial tooth (6) is positioned between the said cutting plane (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103518992A CN102829154A (en) | 2012-09-20 | 2012-09-20 | Gear rack bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103518992A CN102829154A (en) | 2012-09-20 | 2012-09-20 | Gear rack bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102829154A true CN102829154A (en) | 2012-12-19 |
Family
ID=47332397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103518992A Pending CN102829154A (en) | 2012-09-20 | 2012-09-20 | Gear rack bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102829154A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627738A (en) * | 2015-10-30 | 2017-05-10 | 镇江市博新氟塑有限公司 | Self-lubricating rack bushing |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002114162A (en) * | 2000-10-10 | 2002-04-16 | Koyo Seiko Co Ltd | Steering device |
| JP2002276654A (en) * | 2001-03-19 | 2002-09-25 | Oiles Ind Co Ltd | Bearing |
| DE102007042931A1 (en) * | 2007-09-08 | 2008-03-27 | Daimler Ag | Bearing for e.g. gear rack in passenger car, has bearing bush, by which gear rack is slidably supported within steering gear case and comprising annular disc region provided with slots, which extend up to bushing region |
| CN201141431Y (en) * | 2007-12-07 | 2008-10-29 | 荆州恒隆汽车零部件制造有限公司 | Improved rack lining of mechanical steering gear |
| KR100875080B1 (en) * | 2008-10-17 | 2008-12-18 | 김동욱 | Rack bush for car's steering part's |
| JP2009024740A (en) * | 2007-07-17 | 2009-02-05 | Oiles Ind Co Ltd | Synthetic resin slide bearing |
| KR20100088850A (en) * | 2009-02-02 | 2010-08-11 | 주식회사 만도 | Rack bush, and rack and pinion type steering apparatus for vehicle having the same |
| CN202208309U (en) * | 2011-09-09 | 2012-05-02 | 武汉捷隆汽车电动转向系统有限公司 | Highly wear-resisting rack bushing of steering gear |
| CN202806856U (en) * | 2012-09-20 | 2013-03-20 | 重庆龙润汽车转向器有限公司 | Rack lining |
-
2012
- 2012-09-20 CN CN2012103518992A patent/CN102829154A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002114162A (en) * | 2000-10-10 | 2002-04-16 | Koyo Seiko Co Ltd | Steering device |
| JP2002276654A (en) * | 2001-03-19 | 2002-09-25 | Oiles Ind Co Ltd | Bearing |
| JP2009024740A (en) * | 2007-07-17 | 2009-02-05 | Oiles Ind Co Ltd | Synthetic resin slide bearing |
| DE102007042931A1 (en) * | 2007-09-08 | 2008-03-27 | Daimler Ag | Bearing for e.g. gear rack in passenger car, has bearing bush, by which gear rack is slidably supported within steering gear case and comprising annular disc region provided with slots, which extend up to bushing region |
| CN201141431Y (en) * | 2007-12-07 | 2008-10-29 | 荆州恒隆汽车零部件制造有限公司 | Improved rack lining of mechanical steering gear |
| KR100875080B1 (en) * | 2008-10-17 | 2008-12-18 | 김동욱 | Rack bush for car's steering part's |
| KR20100088850A (en) * | 2009-02-02 | 2010-08-11 | 주식회사 만도 | Rack bush, and rack and pinion type steering apparatus for vehicle having the same |
| CN202208309U (en) * | 2011-09-09 | 2012-05-02 | 武汉捷隆汽车电动转向系统有限公司 | Highly wear-resisting rack bushing of steering gear |
| CN202806856U (en) * | 2012-09-20 | 2013-03-20 | 重庆龙润汽车转向器有限公司 | Rack lining |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627738A (en) * | 2015-10-30 | 2017-05-10 | 镇江市博新氟塑有限公司 | Self-lubricating rack bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121219 |