CN106481655A - A kind of recirculating ball-type steering screw rod thrust bearing - Google Patents
A kind of recirculating ball-type steering screw rod thrust bearing Download PDFInfo
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- CN106481655A CN106481655A CN201510523043.2A CN201510523043A CN106481655A CN 106481655 A CN106481655 A CN 106481655A CN 201510523043 A CN201510523043 A CN 201510523043A CN 106481655 A CN106481655 A CN 106481655A
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- screw rod
- raceway
- seat ring
- ball
- thrust bearing
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Abstract
The present invention proposes a kind of recirculating ball-type steering screw rod thrust bearing, and including screw rod, screw rod is provided with thrust ball thrust bearing；Thrust ball thrust bearing includes steel ball, seat ring, and seat ring is made up of left and right half seat ring, and thrust ball bearing race section is four point contact type, is correspondingly provided with the outer raceway of a circular arc respectively in left and right half seat ring；Raceway in two circular arcs is provided with screw rod, in two, raceway is identical with two outer raceway radius, the four arc raceway centers of circle on same circumference but decentraction, steel ball is assemblied between screw rod and seat ring, form at 4 points between steel ball and raceway in two outer raceways and two to contact, constitute four point contact type thrust ball bearings；During assembling, sleeving and riveting anti-loose structure between adjusting nut and valve body, can be adopted.The bearing substitutes blowout patche with screw rod, eliminates retainer, convenient installation；Inside and outside raceway is respectively adopted two circular arcs make, four-point contact ball is constituted, larger axial-radial power can be born, to reduce abrasion, extend the life-span.
Description
Technical field
The present invention relates to automobile steering device manufacturing technology field, more particularly to a kind of thrust bearing on recirculating ball-type steering screw rod.
Background technology
At present, the thrust bearing on Recirculating Ball Steering Gear for Motor Vehicles screw rod has two kinds of patterns：One kind is needle-type thrust bearing, as shown in figure 1, which is generally used for the steering gear of through screw rod, is solely subjected to the axial force of screw rod 1 during use, and the radial direction to screw rod 1 is not spacing, passes through the afterbody in screw rod 1 during assembling（Or head）Mounting and adjusting screw（Or adjusting screw）Be adjusted with the axial gap to screw rod 1, the airframe bearing due at the valve pocket of screw rod in screw rod rotation process circular runout can cause that the abrasion of three road oil sealings herein is larger, service life is shorter, and ultimately causing internal leakage causes hard steering；Another kind is thrust ball bearing, as shown in Fig. 2 which is generally used for the steering gear of non-penetrating formula screw rod, 2 axially positions of screw rod mainly to steering gear and the axial force for bearing screw rod 2 during use（This power is larger）, while 2 radial positionings of screw rod to steering gear and the radial load for bearing screw rod 2（This power is less）It is adjusted with the axial gap to screw rod 2 by the aft end mounting and adjusting nut 3 in screw rod 2 during assembling, and locking process is carried out to adjusting nut 3 by installing clamp ring 4 additional, screw rod 2 is reduced indirectly with this at valve pocket, produces circular runout, reduce the abrasion of three road oil sealings herein, extend the life-span of oil sealing.Commonly used thrust ball bearing mostly is single arc surface contact, friction is larger, easy to wear, steering gear is caused larger axial gap easily occur, simultaneously because being pressed into dead eye using interference or interference fits mode more than thrust ball bearing, bearing fit radial clearance very little is made, when the radial clearance also very little at other positions of steering gear（In order to ensure the relatively freedom in minor affairs gap of steering gear, it will usually reduce screw thread pair clearance and gear pair pair clearance as far as possible）, easily make screw rod cause circular runout at the valve pocket of screw rod when rotating（Due to not coaxial between rack piston, housing, valve body）, cause movement interference, finally increase the aligning torque of steering gear and input torque, affect motor turning performance.
Content of the invention
For overcoming defect of the prior art, reduce abrasion, steering gear service life is improved, the present invention proposes a kind of thrust bearing on recirculating ball-type steering screw rod.
For this purpose, the technical scheme is that：A kind of recirculating ball-type steering screw rod thrust bearing, including screw rod, screw rod is provided with thrust ball thrust bearing, it is characterised in that：The thrust ball thrust bearing includes steel ball, seat ring, seat ring is made up of left half seat ring, right half seat ring, the groove-section of thrust ball thrust bearing adopts four point contact type, is correspondingly provided with the outer raceway of one section of circular arc on left half seat ring, right half seat ring respectively, and outside two sections of circular arcs, raceway radius are identical；Be provided with raceway in two sections of circular arcs on the screw rod, raceway radius are identical in two sections of circular arcs, and identical with the outer raceway radius of circular arc, in two sections of outer raceways of circular arcs and two sections of circular arcs the center of circle of raceway on same circumference, but decentraction；Steel ball is assemblied between screw rod and seat ring, and steel ball forms at 4 points with raceway in the outer raceway of two sections of circular arcs and two sections of circular arcs and contacts, so as to constitute four point contact type thrust ball bearings；When four above-mentioned point contact type thrust ball bearing is assembled, sleeving and riveting anti-loose structure between adjusting nut and valve body, can be adopted.
One kind for technique scheme is improved by：Half seat ring of a left side of thrust bearing is radially to float, and can so make thrust bearing when axial force is born, and automatic capturing makes steel ball stable in theoretical centering, such that it is able to smoothly transmit the axial force of screw rod.
One kind for technique scheme is improved by：The radial fit clearance control of half seat ring of the right side of seat ring and valve body is between 0.05～0.1, to avoid screw rod from producing movement interference with steering gear other parts, while bearing automatic capturing centering when axial force is born is enable, the radial load of part is born, it is to avoid screw rod weares and teares；On the other hand, make radial fit gap not less than 0.05 in design, the locking mode for also helping adjusting nut is smoothly implemented, and the locking mode of current adjusting nut has two kinds：One kind is locking using clamp ring locking, but adjusting nut can occur a little displacement with clamp ring while clamp ring is tightened, impact steering assembly free clearance Adjustment precision, another kind is adjusting nut using sleeving and riveting anti-loose structure, after specifically adjusting nut completes adjustment, valve body and adjusting nut connection screw thread vicinity sleeving and riveting some, connection screw thread is made to deform upon guarantee locking, but connection screw thread deforms upon the radial displacement while adjusting nut generation can be made small, causes screw rod to rotate and causes circular runout at the valve pocket of screw rod（Not coaxial due to existing between rack piston, housing, valve body）Cause movement interference, finally increase the aligning torque of steering gear and input torque, so avoiding, by radial fit gap is allow in design, the aligning torque and input torque increase problem that above-mentioned locking mode causes not less than 0.05；Make radial fit gap be not more than 0.1 in design, be in order that thrust bearing automatic capturing centering when axial force is born, so that screw rod smoothly bears part radial load, it is to avoid three road oil sealing abrasion at the valve pocket of screw rod, improves its life-span.
Another for technique scheme is improved by：The edge of the outer raceway of the circular arc of raceway and seat ring is respectively equipped with chamfering in the circular arc of the screw rod, it is to avoid the burr that inside and outside raceway angle is squeezed out scratches steel ball, extends the life-span.
Further improvement is that for technique scheme：The link position of raceway is provided with chip pocket in two sections of circular arcs of the screw rod, for storing impurity, reduces abrasion.
Beneficial effect：
The present invention passes through to arrange interior raceway corresponding with the outer raceway of seat ring on screw rod, constitutes whole screw rod thrust bearing with steel ball cooperation, substitutes the blowout patche of original thrust ball bearing with screw rod, while retainer is eliminated, so that assembly space reduces, and convenient installation；Seat ring is arranged to the structure of left and right two and half seat ring, makes installation easy；Raceway in screw rod and the outer raceway of seat ring are respectively adopted two sections of circular arcs and make, make between steel ball and inside and outside raceway, to form at 4 points and contact, constitute four point contact type thrust ball bearings, so as to larger axially and radially load forces can be born, increase rated load, impact resistance is improved, abrasion is effectively reduced, extend steering gear service life.The airframe bearing, replaces the original clamp ring locking of adjusting nut locking in fit on using sleeving and riveting is locking, saves clamp ring, reduce manufacturing cost, and reduction takes up room, and improves reliability.
Description of the drawings
Fig. 1 is the assembling structure schematic diagram of the needle-type thrust bearing on existing Recirculating Ball Steering Gear for Motor Vehicles screw rod；
Fig. 2 is the assembling structure schematic diagram of the thrust ball bearing on existing Recirculating Ball Steering Gear for Motor Vehicles screw rod；
Fig. 3 is the assembling structure schematic diagram of the present invention and recirculating ball-type steering screw rod；
Structure enlarged diagram at I in Fig. 4 Fig. 3；
Structure enlarged diagram at II in Fig. 5 Fig. 4.
In figure is numbered：1st, screw rod；2nd, screw rod；3rd, adjusting nut；4th, clamp ring；5th, screw rod；6th, left half seat ring；7th, right half seat ring；8th, steel ball；9th, adjusting nut；10th, valve body；11st, chamfering；12nd, chip pocket；R, the radius of steel ball；The radius of the outer raceway of R1, circular arc.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Fig. 3, Fig. 4, Fig. 5, a kind of recirculating ball-type steering screw rod thrust bearing, including screw rod 5, thrust ball thrust bearing is provided with screw rod 5；The thrust ball thrust bearing includes steel ball 8 and seat ring, seat ring is accurately assembled by left half seat ring 6, right half seat ring 7, the groove-section of thrust ball thrust bearing adopts four point contact type, the outer raceway of one section of circular arc is respectively equipped with left half seat ring 6 with right half seat ring 7, and outside two sections of circular arcs, the radius R1 of raceway is identical；Be provided with raceway in two sections of circular arcs on the screw rod 5, the radius of raceway is identical in two sections of circular arcs, and identical with the radius R1 of the outer raceway of circular arc, in the outer raceway of two sections of circular arcs and two sections of circular arcs the center of circle of raceway on same circumference, but decentraction；Steel ball 8 is assemblied between screw rod and seat ring, is made steel ball form with raceway in the outer raceway of two sections of circular arcs and two sections of circular arcs at 4 points and contacts, so as to constitute four point contact type thrust ball bearings；When four above-mentioned point contact type thrust ball bearing is assembled, make to adopt sleeving and riveting anti-loose structure between adjusting nut 9 and valve body 10, to ensure the Adjustment precision of steering assembly free clearance.
As shown in Figure 4, Figure 5, half seat ring 6 of a left side of thrust bearing is being radially to float, and can so make thrust bearing when axial force is born, and automatic capturing makes steel ball 8 stable in theoretical centering, such that it is able to smoothly transmit the axial force of screw rod 5.
As shown in Figure 3, Figure 4, by the radial fit clearance control of half seat ring 7 of the right side of seat ring and valve body 10 0.05, to avoid screw rod 5 from producing movement interference with steering gear other parts, while enabling bearing automatic capturing centering when axial force is born, bear the radial load of part, it is to avoid screw rod weares and teares；On the other hand, make radial fit gap not less than 0.05 in design, the locking mode for also helping adjusting nut 9 is smoothly implemented, and the locking mode of current adjusting nut has two kinds：One kind is locking using clamp ring locking, but adjusting nut can occur a little displacement with clamp ring while clamp ring is tightened, impact steering assembly free clearance Adjustment precision, another kind is adjusting nut using sleeving and riveting anti-loose structure, after specifically adjusting nut completes adjustment, valve body and adjusting nut connection screw thread vicinity sleeving and riveting some, connection screw thread is made to deform upon guarantee locking, but connection screw thread deforms upon the radial displacement while adjusting nut generation can be made small, causes screw rod to rotate and causes circular runout at the valve pocket of screw rod（Not coaxial due to existing between rack piston, housing, valve body）Cause movement interference, finally increase the aligning torque of steering gear and input torque, so avoiding, by radial fit gap is allow in design, the aligning torque and input torque increase problem that above-mentioned locking mode causes not less than 0.05（Simultaneously, half seat ring 7 of the right side of seat ring and the radial fit gap no more than 0.1 of valve body 10, so that thrust bearing automatic capturing centering when axial force is born, so that screw rod smoothly bears part radial load, three road oil sealing abrasion at the valve pocket of screw rod is avoided, improves its life-span）.
As shown in figure 5, having gap between the raceway of the thrust ball thrust bearing and steel ball, impurity can be stored, reducing abrasion, the radius R1 of raceway in the outer raceway of circular arc and circular arc in design, should be made（In circular arc, the radius of raceway is equal to the radius of the outer raceway of circular arc）More than the radius R of steel ball 8, in the outer raceway of two sections of circular arcs and two sections of circular arcs the center of circle of raceway on same circumference, but decentraction；Raceway and seat ring in the circular arc of the screw rod 5（Left half seat ring 6 and right half seat ring 7）The edge of the outer raceway of circular arc be respectively equipped with chamfering 11, steel ball 8 is scratched with the burr that avoids inside and outside raceway angle from being squeezed out, is increased the service life.
As shown in figure 5, the link position of raceway is provided with chip pocket 12 in two sections of circular arcs of the screw rod 5, for impurity is stored, reduce abrasion.
The present invention passes through to arrange interior raceway corresponding with the outer raceway of seat ring on screw rod, constitutes whole screw rod thrust bearing with steel ball cooperation, substitutes the blowout patche of original thrust ball bearing with screw rod, while retainer is eliminated, so that assembly space reduces, and convenient installation；Seat ring is arranged to the structure of left and right two and half seat ring, makes installation easy；Raceway in screw rod and the outer raceway of seat ring are respectively adopted two sections of circular arcs and make, make between steel ball and inside and outside raceway, to form at 4 points and contact, constitute four point contact type thrust ball bearings, so as to larger axially and radially load forces can be born, increase rated load, impact resistance is improved, abrasion is effectively reduced, extend steering gear service life.The airframe bearing, replaces the original clamp ring locking of adjusting nut locking in fit on using sleeving and riveting is locking, saves clamp ring, reduce manufacturing cost, and reduction takes up room, and improves reliability.
Claims (8)
1. a kind of recirculating ball-type steering screw rod thrust bearing, including screw rod, screw rod is provided with thrust ball thrust bearing, it is characterised in that：The thrust ball thrust bearing includes steel ball, seat ring, seat ring is made up of left half seat ring, right half seat ring, the groove-section of thrust ball thrust bearing adopts four point contact type, is correspondingly provided with the outer raceway of one section of circular arc on left half seat ring, right half seat ring respectively, and outside two sections of circular arcs, raceway radius are identical；Be provided with raceway in two sections of circular arcs on the screw rod, raceway radius are identical in two sections of circular arcs, and identical with the outer raceway radius of circular arc, in two sections of outer raceways of circular arcs and two sections of circular arcs the center of circle of raceway on same circumference, but decentraction；Steel ball is assemblied between screw rod and seat ring, and steel ball forms at 4 points with raceway in the outer raceway of two sections of circular arcs and two sections of circular arcs and contacts, so as to constitute four point contact type thrust ball bearings；When four above-mentioned point contact type thrust ball bearing is assembled, sleeving and riveting anti-loose structure between adjusting nut and valve body, can be adopted.
2. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 1, it is characterised in that：Half seat ring of a left side of the seat ring can diametrically float.
3. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 1 and 2, it is characterised in that：Half seat ring of the right side of seat ring and the radial fit clearance control of valve body are made between 0.05～0.1.
4. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 1 and 2, it is characterised in that：The edge of raceway and the outer raceway of seat ring is respectively equipped with chamfering in the described screw rod.
5. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 3, it is characterised in that：The edge of raceway and the outer raceway of seat ring is respectively equipped with chamfering in the described screw rod.
6. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 1 and 2, it is characterised in that：The link position of raceway is provided with chip pocket in described two circular arc of screw rod.
7. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 3, it is characterised in that：The link position of raceway is provided with chip pocket in described two circular arc of screw rod.
8. a kind of recirculating ball-type steering screw rod thrust bearing according to claim 5, it is characterised in that：The link position of raceway is provided with chip pocket in described two circular arc of screw rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523043.2A CN106481655A (en) | 2015-08-25 | 2015-08-25 | A kind of recirculating ball-type steering screw rod thrust bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510523043.2A CN106481655A (en) | 2015-08-25 | 2015-08-25 | A kind of recirculating ball-type steering screw rod thrust bearing |
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| CN106481655A true CN106481655A (en) | 2017-03-08 |
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| CN201510523043.2A Pending CN106481655A (en) | 2015-08-25 | 2015-08-25 | A kind of recirculating ball-type steering screw rod thrust bearing |
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| CN108082272A (en) * | 2017-12-21 | 2018-05-29 | 芜湖恒隆汽车转向系统有限公司 | A kind of support device of rack-and-pinion manual steering gear |
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Application publication date: 20170308 |
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