CN100547251C - Heavy-duty car direction converter bearing and preparation process thereof - Google Patents
Heavy-duty car direction converter bearing and preparation process thereof Download PDFInfo
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- CN100547251C CN100547251C CNB2007100203218A CN200710020321A CN100547251C CN 100547251 C CN100547251 C CN 100547251C CN B2007100203218 A CNB2007100203218 A CN B2007100203218A CN 200710020321 A CN200710020321 A CN 200710020321A CN 100547251 C CN100547251 C CN 100547251C
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- raceway
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- car
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Abstract
The present invention relates to a kind of auto parts, especially a kind of heavy-duty car direction converter bearing and preparation process thereof.Has raceway in the right angle type on the opening of bearing shell one side, annular array cylindrical roller on the interior raceway, roller is provided with chucking cushion block in the gap between the roller end to end through being close to after arranging, the opposite side end face of bearing shell is provided with pin-and-hole, bearing shell inner ring is provided with interior seal groove, and the outer ring of bearing shell and interior raceway have the line in eccentric structure and the center of circle, outer ring and the interior raceway center of circle and the axis of symmetry of pin-and-hole on end face in the same way; The processing of its middle (center) bearing shell have the cylindrical of the endoporus of car pin-and-hole end and end face, car raceway end and end face, rough turn in raceway in the endoporus of seal groove, two exterior edge faces of mill, cylindrical grinding, mill pin-and-hole end, the mill in raceway, high frequency hardening, the car in the raceway, quenching with Subsequent tempering, buffing cylindrical, finish turning, bore the process that expands two pin-and-holes, car eccentric excircle, car locating slot, the angle of falling the finished product, whole cylindrical grinding.
Description
Technical field
The present invention relates to a kind of auto parts, especially a kind of heavy-duty car direction converter bearing and preparation process thereof.
Background technique
The power steering system of heavy-duty car comprises steering wheel, steering shaft, turns to jack shaft, steering oil pipe, steerig pump, steering oil tank, steering knuckle arm, steering tie rod, pitman arm, Integral steering device, steering drag link, damper; When the driver rotates steering wheel, drive the commutator input shaft and rotate, and drive the pitman arm swing by the commutator output shaft, by steering drag link, drag link, steering knuckle arm, make deflecting roller deflection, thereby change the direction of travel of automobile.Meanwhile, the steering control valve that the commutator input shaft also drives commutator inside rotates, and makes power cylinder produce hydraulic action, helps driver's handling maneuver.Like this, in order to overcome the steering resisting torque of ground effects on deflecting roller, the driver need be added on the steering torque on the steering wheel, and steering torque required during than usefulness mechanical steering system is much smaller.
A kind of Worm-gear type commutator for the heavy-duty car use, traditional structure is to adopt eccentric bushing to add upper bearing (metal) at the two ends of worm-wheel shaft to assemble, original capacity eccentric bearing structure as attached Fig. 1 and 2, outmost turns is an eccentric bushing, what inner ring was arranged is roller, what the centre was provided with is raceway, and there is a chucking cushion block roller gap of arrangement.Can regulate the back lash of worm gear and worm screw during assembling, but in case just can't regulate the back lash after the assembling, can only be by becoming the back lash of transverse tooth thickness and screw adjusted gap worm gear and worm screw, and because the noninterchangeability of capacity eccentric bearing, the assembling trouble of worm and wheel, assembly precision is relatively poor, and the time of assembling is long, effect is low, difficulty is big.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of new capacity eccentric bearing that is installed on the commutator of heavy-duty car Worm-gear type is provided, the existing deficiency that can not after assembling, regulate the back lash of worm and gear again of capacity eccentric bearing of present use can be overcome, and the installation capability of capacity eccentric bearing and the usability of commutator can be further improved.
The technical solution adopted for the present invention to solve the technical problems is: a kind of heavy-duty car direction converter bearing, include bearing shell and roller, has raceway in the right angle type on the opening of described bearing shell one side, annular array cylindrical roller on the interior raceway, roller is provided with chucking cushion block in the gap between the roller end to end through being close to after arranging, the opposite side end face of bearing shell is provided with two pin-and-holes, pin-and-hole and bearing same axial, described pin-and-hole is two first pin-and-hole and second pin-and-holes that are positioned on the same diameter line, first pin-and-hole has different apertures with second pin-and-hole, bearing shell inner ring between end face with pin-and-hole and interior raceway is provided with seal groove at least one, and the outer ring of described bearing shell and interior raceway have eccentric structure.Sealing is installed in the interior seal groove, is used for the sealing between bearing shell and the worm-wheel shaft.
Furtherly: 0.8～1.5 millimeter of the center of circle, outer ring of described bearing shell and interior raceway center of circle skew.
Furtherly: the surface of the round inwall of raceway and end inwall is through Quenching Treatment in the described right angle type, and wherein justifying the inwall depth of hardening and be 0.65～2.0 millimeter, quenching hardness is HRC57～62; End inwall depth of hardening is that 0.65～1.5 millimeter, quenching hardness are HRC54～62.
Furtherly: described chucking cushion block is that the X-shaped and X-shaped two outsides are the arc that matches with the roller outer wall.
Furtherly: the outer periphery of described bearing shell is provided with the annular positioning groove that is used for the bearing axially locating.
The preparation process of this heavy-duty car direction converter bearing comprises the processing respectively of bearing shell, roller, chucking cushion block and the process that bearing assembles; The processing of described bearing shell has following process again: the endoporus and the end face of a. car pin-and-hole end, the cylindrical and the end face of b. car raceway end, raceway in c. is rough turn, d. quenching with Subsequent tempering, raceway in the e. buffing cylindrical, f. finish turning, g. seal groove in the high frequency hardening, h. car, i. grinds two exterior edge faces, j. cylindrical grinding, the endoporus of k. mill pin-and-hole end, raceway in the l. mill, m. bore and expand two pin-and-holes, n. car eccentric excircle, o. car locating slot, p. the angle of falling the finished product, the whole cylindrical grinding of q..
Furtherly: the used inductor of described process g. high frequency hardening has the structure that can be built in bearing track, and the cross section of inductor is a rectangle,
Furtherly: the inner hole wall gap of described inductor and interior raceway is 0.3～0.8 millimeter, with the gap of interior raceway Transverse plane be 0.3～0.8 millimeter.
Furtherly: described process n. car eccentric excircle is the process that adopts expanding type single-piece car eccentric fixture to carry out endoporus location single-piece work.
This capacity eccentric bearing assembles use in pairs, fourth contact and external diameter have eccentric structure in the capacity eccentric bearing roller, with the external diameter assembling and positioning, assembling worm-wheel shaft in the fourth contact in the roller, eccentric effect is the correctness of regulating the engaging position of worm and wheel, the employing capacity eccentric bearing is regulated the gap, changes tradition and becomes transverse tooth thickness and pass through the screw adjusted gap; And the employing straight-tooth, greatly reduce the difficulty of processing of sector shaft.Regulating eccentric position is that employing is inserted special-purpose fitter spanner adjusting in two first, second pin-and-holes on eccentric direction, and fitter spanner makes two capacity eccentric bearings rotate simultaneously, enters the tram of meshing with worm gear to adjust worm screw, reaches the matching requirements of commutator.
The invention has the beneficial effects as follows that capacity eccentric bearing of the present invention is applied to the worm and gear commutator of heavy-duty car and can regulates the back lash of worm and gear all the time, assembling is simple, and assembly precision is good.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the plan view of original capacity eccentric bearing.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the plan view of capacity eccentric bearing of the present invention.
Fig. 4 is the B-B sectional view of Fig. 3.
Fig. 5 is that the quench hardened case of bearing of the present invention requires schematic representation.
Fig. 6 is the C place enlarged view of Fig. 5.
Fig. 7 is to the schematic representation in the NBS of corner portions quench hardened case.
Fig. 8 is the defective form schematic representation that the corner portions quench hardened case is easily formed.
Fig. 9 is the D place enlarged view of Fig. 8.
Figure 10 is the schematic cross-section of inductor used in the manufacturing process of the present invention.
1. bearing shells among the figure, 2. roller 3. tightens cushion block, 11. interior raceways, 12. interior seal grooves, 13. outer rings, 14. first pin-and-holes, 15. second pin-and-holes, 16. locating slots.
Embodiment
As a kind of heavy-duty car direction converter bearing of accompanying drawing, include bearing shell 1 and roller 2, has raceway 11 in the right angle type on the opening of bearing shell 1 one sides, annular array cylindrical roller 2 on the interior raceway 11, roller 2 is arranged the back and is provided with in the gap between the roller 2 end to end and tightens cushion block 3 through being close to, the opposite side end face of bearing shell 1 is provided with two pin-and-holes, pin-and-hole and bearing same axial, bearing shell 1 inner ring between end face with pin-and-hole and interior raceway 11 is provided with seal groove 12 at least one, and the outer ring 13 and the interior raceway 11 of bearing shell 1 have eccentric structure, and eccentric direction and the pin-and-hole axis of symmetry on end face in the same way.
Pin-and-hole is two and is positioned at first pin-and-hole 14 on the same diameter line and second pin-and-hole, 15, the first pin-and-holes 14 and has different apertures with second pin-and-hole 15 and be respectively
The millimeter and
Millimeter.
1 millimeter of 13 centers of circle, outer ring of bearing shell 1 and interior raceway 11 center of circle skew.
Handle through high frequency hardening on the surface of the round inwall of raceway and end inwall in the right angle type, and wherein justifying the inwall depth of hardening and be 0.65～2.0 millimeter, quenching hardness is HRC57～62; End inwall depth of hardening is that 0.65～1.5 millimeter, quenching hardness are HRC54～62.
The chucking cushion block is that the X-shaped and X-shaped two outsides are the arc that matches with the roller outer wall.
The outer periphery of bearing shell 1 is provided with annular positioning groove 16, annular positioning groove 16 be arranged on pin-and-hole mutually nearby.
Capacity eccentric bearing of the present invention shown in accompanying drawing 3 and 4, the capacity eccentric bearing automobile steering device assembly pump housing of packing into, pack into the interior raceway of eccentric bearing block and with chucking cushion block chucking of roller, assembling worm-wheel shaft in the fourth contact in the roller, the chucking cushion block is still stayed in the bearing in transportation and bearing using process, the circumferential preload of cushion block is 50～150N, and the roller slip power between two rollers is 10～30N.1～2 plain cushion and the combined sealed groove of O type circle are arranged in the brearing bore, the other end has two pin-and-holes to be used for regulating worm screw to enter tram with the worm gear engagement, the throw of eccentric of fourth contact and external diameter is 0.8～1.5 millimeter in the roller, and other has an end face groove to be used for fixing the circumferential position of capacity eccentric bearing in the automobile steering device assembly pump housing.
Below the present invention is described further in the characteristics of configuration aspects:
1. owing to when assembling, can't see the engagement situation of the inside, for making the center line after worm-wheel shaft assembles not crooked, the eccentric direction of two capacity eccentric bearings is consistent, and its adjusting is to regulate by two first pin-and-holes on the two capacity eccentric bearing end faces and second pin-and-hole with special-purpose fitter spanner, therefore, the two pin-and-hole lines of centres require consistent with eccentric direction.
2. same, for making the center line after worm-wheel shaft assembles not crooked, the throw of eccentric of the capacity eccentric bearing of assembling use requires unanimity in pairs.
Specific requirement to above two characteristics is:
1, the position degree requirement of fourth contact center line and two pin-and-hole center lines is in the roller
Millimeter.
2, the angle error of the two pin-and-hole lines of centres and eccentric centerline direction is for being not more than ± 1.43 degree (1 ° 26 ').
3, bearing uses in pairs, and the throw of eccentric variation of time bearing is not more than 0.025 millimeter by the gross.At above-mentioned requirements, if be at definite first pin-and-hole
Millimeter, second pin-and-hole is
Millimeter (pin-and-hole is not both installation of the present invention and adjusting for convenience): as calculated, with
The millimeter pin-and-hole is circumferentially located, when deflection 1.43 is spent between the two pin-and-hole lines of centres and eccentric center line,
Gap between millimeter pin-and-hole and the locating stud is 0.84 millimeter, therefore in control
Gap between millimeter pin-and-hole and the locating stud is under 0.84 millimeter situation, can single-piece work, and can guarantee that its deflection angle is in tolerance range.
Capacity eccentric bearing of the present invention is behind the back lash that regulates worm gear and worm screw, the bearing shell radially should be located, concrete a kind of more simple and practical method is to rivet tightly the outer ring of bearing shell along the limit with the structure on the steering gear housing, an enclosing cover is installed outside the bearing shell again, and the enclosing cover outside is installed a jump ring that snaps in locating slot on the bearing shell again.
The preparation process of this heavy-duty car direction converter bearing comprises the processing respectively of bearing shell, roller, chucking cushion block and the process that bearing assembles; The processing of described bearing shell has following process again: the endoporus and the end face of a. car pin-and-hole end, the cylindrical and the end face of b. car raceway end, raceway in c. is rough turn, d. quenching with Subsequent tempering, raceway in the e. buffing cylindrical, f. finish turning, g. seal groove in the high frequency hardening, h. car, i. grinds two exterior edge faces, j. cylindrical grinding, the endoporus of k. mill pin-and-hole end, raceway in the l. mill, m. bore and expand two pin-and-holes, n. car eccentric excircle, o. car locating slot, p. the angle of falling the finished product, the whole cylindrical grinding of q..
The used inductor of process g. high frequency hardening has the structure that can be built in bearing track, and the cross section of inductor is a rectangle; The inner hole wall gap of inductor and interior raceway is 0.5 millimeter, with the gap of interior raceway Transverse plane be 0.5 millimeter.
Process n. car eccentric excircle is the process that adopts expanding type single-piece car eccentric fixture to carry out endoporus location single-piece work.
Again the characteristics of preparation process of the present invention are described further below:
General bearing products 98% takes the GCr15 Bearing Steel to harden and make through integral body, and minority adopts the carburizing and quenching steel to make, and induction hardening seldom adopts.But along with the development of society, induction hardened development prospect is extremely wide, and the induction hardening process characteristics are as follows:
1, induction heating belongs to endogenous pyrogen and directly heats, and thermal loss is little, and rate of heating is fast, thermal efficiency height.
2, in the heating process, because heating time is short, the part surface oxidation and decarbonization is few, without methyl alcohol or nitrogen protection.
3, part surface hardness height behind the induction hardening, modified heart portion keeps better plasticity and toughness, presents low notch sensitivity, so impact toughness, fatigue strength and wear resistance etc. improves a lot.
4, induction heating equipment compactness, floor space is little, and is easy to use.
5, production process cleaning, no high temperature, working condition is good.
6, can replace polluting the finish quenching medium big, that cost is high with the aqua quenching medium.
To have rate of heating fast for induction heating technology in a word, the manufacturing efficiency height, save the energy, oxidation and decarbonization not, free from environmental pollution, be easy to mechanization and automation, meet 3S standard that modern industry produces and 3C standard (Sure is reliable, Safe safety, Saving saves and Cool low temperature, Clean clean, the Clam peace and quiet).Induction hardening is widely used at the auto parts and components manufacture view especially.
At this bearing we the decision take modified as conditioning heat treatment, working surface inducing quenching and tempering technology.Modified one side guarantees that on the other hand other positions of part have good comprehensive mechanical performance, as accompanying drawing 5 and accompanying drawing 6 as induction hardened pretreatment.
The induction hardening position of this bearing is to quench simultaneously in endoporus and plane, has a lot of difficult points:
1, in the heating process, heating suitable for reading is fast, and the corner portions that plane and endoporus intersect can't heat, and this position permission is not quenched for 8 millimeters in China's standard, but can't satisfy the usage requirement of this bearing, as accompanying drawing 7.
2, the thick heating of endoporus is slow, and the plane rib is easily through hardening, hardening crack and fusing as thin as a wafer, as accompanying drawing 8 and Fig. 9.
3, inductor two sides heating, door type magnet case can't be installed.
4, can't design the jet hardening circle on the inductor, the quenching hardness of heating back immersion liquid simultaneously is lower, does not reach designing requirement (material 40Cr, HRC 57-62).
5, the distance of endoporus plane heating inductor and workpiece is near, very easily produces and draws fire, burns out inductor and workpiece, and the necessary favourable identity in the gap of workpiece and inductor, the positioning requirements height.
Long-pending and the case depth according to the hardened face of part, equipment choosing 100KW, 250KHZGGC-80-2 variable-frequency power sources, the CK-600 numerical control quenching machine tool is with 5%-8% U.S. Houghton Q251 aqua quenching medium.
Inductor design becomes the rectangular cross-section, as accompanying drawing 10, heats endoporus and plane simultaneously, and the method for metallic shield is adopted at rib diameter of bore position, plane, reduces the workpiece heating-up temperature.The design of jet hardening circle is sprayed water simultaneously after heating finishes and is cooled off workpiece and inductor above workpiece and inductor.
Concrete process parameter is as follows:
0.5 millimeter in the gap of inductor and endoporus, with 0.5 millimeter in the gap of interior edge face, 5-5.1 second heating time, heating-up temperature 870-880 degree, anode high voltage 11.8KV, anode current 6.5A, grid current 1.6A, 4-5 second cool time, 20 seconds/part of productive temp.
Detect to adopt line cutting sample preparation, detect effective case depth (RhtHV500) with the HX-1000 microthermometer, it is qualified that metallographic press the JB/T9204-1999 standard 1-5 level of grading with the XJG-05 microscope.Surface hardness detects with the HR-150A Rockwell hardness tester.
Locate with endoporus for process n. car eccentric excircle, select to adopt the tire location of expanding, to eliminate the gap, location of endoporus.Adopt the car eccentric fixture for this reason, have parts such as eccentric taper sheath, locating stud, bloated tire on the eccentric fixture, expanding type single-piece car eccentric fixture.Make the product precision of this capacity eccentric bearing reach the assembly performance requirement of truck commutator.
Process for quenching in the manufacturing process of the present invention and processing method of off-centre has further been improved the mechanical property and the machining accuracy of this capacity eccentric bearing.
Claims (9)
1. heavy-duty car direction converter bearing, include bearing shell and roller, it is characterized in that: have raceway in the right angle type on the opening of described bearing shell one side, annular array cylindrical roller on the interior raceway, roller is provided with chucking cushion block in the gap between the roller end to end through being close to after arranging, the opposite side end face of bearing shell is provided with two pin-and-holes, pin-and-hole and bearing same axial, described pin-and-hole is two first pin-and-hole and second pin-and-holes that are positioned on the same diameter line, first pin-and-hole has different apertures with second pin-and-hole, bearing shell inner ring between end face with pin-and-hole and interior raceway is provided with seal groove at least one, and the outer ring of described bearing shell and interior raceway have eccentric structure, and the line in the center of circle, outer ring and the interior raceway center of circle and the axis of symmetry of pin-and-hole on end face are in the same way.
2. according to the described heavy-duty car direction converter bearing of claim 1, it is characterized in that: 0.8～1.5 millimeter of the center of circle, outer ring of described bearing shell and interior raceway center of circle skew.
3. according to the described heavy-duty car direction converter bearing of claim 1, it is characterized in that: the surface of the round inwall of raceway and end inwall is through Quenching Treatment in the described right angle type, and wherein justifying the inwall depth of hardening and be 0.65～2.0 millimeter, quenching hardness is HRC57～62; End inwall depth of hardening is that 0.65～1.5 millimeter, quenching hardness are HRC54～62.
4. according to the described heavy-duty car direction converter bearing of claim 1, it is characterized in that: described chucking cushion block is that the X-shaped and X-shaped two outsides are the arc that matches with the roller outer wall.
5. according to the described heavy-duty car direction converter bearing of claim 1, it is characterized in that: the outer periphery of described bearing shell is provided with the annular positioning groove that is used for the bearing axially locating.
6. the preparation process of a heavy-duty car direction converter bearing as claimed in claim 5 is characterized in that: the process that comprises the processing respectively and the bearing assembling of bearing shell, roller, chucking cushion block; The processing of described bearing shell has following process again: the endoporus and the end face of a. car pin-and-hole end, the cylindrical and the end face of b. car raceway end, raceway in c. is rough turn, d. quenching with Subsequent tempering, raceway in the e. buffing cylindrical, f. finish turning, g. seal groove in the high frequency hardening, h. car, i. grinds two exterior edge faces, j. cylindrical grinding, the endoporus of k. mill pin-and-hole end, raceway in the l. mill, m. bore and expand two pin-and-holes, n. car eccentric excircle, o. car locating slot, p. the angle of falling the finished product, the whole cylindrical grinding of q..
7. the preparation process of heavy-duty car direction converter bearing according to claim 6 is characterized in that the used inductor of described process g. high frequency hardening has the structure that can be built in raceway in the bearing, and the cross section of inductor is a rectangle.
8. the preparation process of heavy-duty car direction converter bearing according to claim 7, the inner hole wall gap that it is characterized in that described inductor and interior raceway is 0.3～0.8 millimeter, with the gap of interior raceway Transverse plane be 0.3～0.8 millimeter.
9. the preparation process of heavy-duty car direction converter bearing according to claim 6 is characterized in that described process n. car eccentric excircle, is the process that adopts expanding type single-piece car eccentric fixture to carry out endoporus location single-piece work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100203218A CN100547251C (en) | 2007-02-13 | 2007-02-13 | Heavy-duty car direction converter bearing and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100203218A CN100547251C (en) | 2007-02-13 | 2007-02-13 | Heavy-duty car direction converter bearing and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245806A CN101245806A (en) | 2008-08-20 |
| CN100547251C true CN100547251C (en) | 2009-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100203218A Expired - Fee Related CN100547251C (en) | 2007-02-13 | 2007-02-13 | Heavy-duty car direction converter bearing and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100547251C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012526247A (en) * | 2009-05-06 | 2012-10-25 | アクツィエブーラゲート エスケイエフ | Race element and bearing device for large rolling bearing |
| CN106938588A (en) * | 2016-01-04 | 2017-07-11 | 宁波高新区清水绿山环保科技有限公司 | A kind of shaftless Electricmotor car wheel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614127A (en) * | 1982-10-20 | 1986-09-30 | Zahnradfabrik Friedrichshafen, Ag. | Steering gear |
-
2007
- 2007-02-13 CN CNB2007100203218A patent/CN100547251C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614127A (en) * | 1982-10-20 | 1986-09-30 | Zahnradfabrik Friedrichshafen, Ag. | Steering gear |
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| Publication number | Publication date |
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| CN101245806A (en) | 2008-08-20 |
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Application publication date: 20080820 Assignee: Jiangsu Rongtianle Machinery Joint-stock Co., Ltd. Assignor: Yang Yanmin Contract record no.: 2010320000415 Denomination of invention: Heavy-duty car direction converter bearing and its manufacturing technique Granted publication date: 20091007 License type: Exclusive License Record date: 20100419 |
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Granted publication date: 20091007 Termination date: 20180213 |
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