CN102759423B - Gear ring of non-contactable torque sensor and processing method thereof - Google Patents
Gear ring of non-contactable torque sensor and processing method thereof Download PDFInfo
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- CN102759423B CN102759423B CN201210275059.2A CN201210275059A CN102759423B CN 102759423 B CN102759423 B CN 102759423B CN 201210275059 A CN201210275059 A CN 201210275059A CN 102759423 B CN102759423 B CN 102759423B
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Abstract
The invention provides a gear ring of a non-contactable torque sensor and a processing method thereof and belongs to the technical field of automobile manufacturing. The gear ring non-contactable torque sensor solves the problem that the existing non-contactable torque sensor is complicated in the processing technology and high in manufacturing cost. The gear ring of the non-contactable torque sensor comprises a tubular body, wherein arc-shaped gear grooves are circumferentially arranged on the end surface of the body, the direction of the arc-shaped axes of the gear grooves is identical to the radial direction of the tubular body, and the gear grooves are evenly distributed on the lateral wall of the body. The processing method of the gear ring includes: A, material choosing and blanking; B, clamping: enabling the end surfaces of two blank materials to be adhered with each other and coaxially fixed on a drilling bed, and enabling the lateral walls of the blank materials to face to a drilling head; and C, drilling: drilling holes by using the adhering border line of the two blank materials as the drilling central line. By means of the processing method, manufacture cost is effectively reduced, and processing accuracy of the gear grooves is ensured.
Description
Technical field
The invention belongs to field of automobile, relate to gear ring and the job operation thereof of a kind of gear ring and ring gear machining method, particularly a kind of non-contact torque sensor.
Background technology
Automobile electric booster steering system is called for short EPS, since the proposition eighties in last century and application, simple with its fuel-efficient energy-saving and environmental protection, safety, structure, be convenient to device and maintenance, and provide the evident characteristics such as power steering as required, significantly improved the Static and dynamic performance of automobile, replacing hydraulic booster vehicle steering system has gradually become a kind of trend.
Since 21 century, the widespread use EPS servo steering systems such as domestic and international car, micro-car, commercial car, new-energy automobile.Comparatively universal is steering column-type, pinion wheel booster type, tooth bar booster type, up-to-dately releases circulating ball type again.But be that the EPS electric boosting steering system of any pattern all must configure torque sensor.Torque sensor is vital parts in EPS, the distortion of torque signal, delayed, discrete direct stability and the security affecting automobile steering manipulation.
Technology along with EPS electric boosting steering system is gradually improved and promotes, and the torque sensor of this system configuration is also constantly updated thereupon and promotes.EPS torque sensor has following four kinds of patterns both at home and abroad at present: potentiometric transducer, Pierre's disc type sensor, aluminium magnetism-isolating loop formula sensor, gear ring magnetic induction sensor, wherein potentiometric transducer and Pierre's disc type sensor are touch sensor, and magnetism-isolating loop formula sensor and gear ring magnetic induction sensor then belong to non-contacting sensor.Non-contacting sensor because of its structure simple, adopt the contactless form of magnetic induction, performance is better than touch sensor.And gear ring magnetic induction sensor is the most universal and technological precedence at present, Japanese EPS takes the lead in releasing and extensively being adopted by the Japanese car of Japanese car and domestic joint production.
Contactless gear ring magnetic induction sensor comprises: output shaft, intermediate shaft, torque arm, inductive coil assembly, change send plate and a middle gear ring and two heel teeth circles, the technological requirement of these three gear rings is high, manufacture and processing difficulties, processing cost is high, adds the manufacturing cost of torque sensor.By traditional method for designing, two heel teeth circle tooth Shape Design are trapezoidal, and middle gear ring tooth Shape Design is trapezoidal or rectangle.This design, brings great difficulty to processing.Under this design conditions, three gear rings can only be shaping by two kinds of methods: one, cold extrusion or powder metallurgy sintering; Two, materials in the tube are machined to trapezoidal or rectangle.The former manufacturing accuracy is low, causes material and position error not to reach technical requirement.The latter causes processing cost high, and not easily reaches the uniform technical requirement of profile of tooth.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose gear ring and the job operation thereof of the very easy non-contact torque sensor of a kind of processing.
Object of the present invention realizes by following technical proposal: a kind of gear ring of non-contact torque sensor, comprise body in a tubular form, on the end face of described body, circumference offers curved teeth groove, and the arc axle center of described teeth groove overlaps with the radial direction of body and is distributed on the sidewall of body.
Difficult for solving ring gear machining, the problem that precision is low, first will understand gear ring role in sensor construction.Non-contact torque sensor has three gear rings: heel teeth circle I, heel teeth circle II, middle gear ring, heel teeth circle I is fixed on output shaft, middle gear ring and heel teeth circle II are fixed on (intermediate shaft and input shaft bottom gun iron link) on intermediate shaft, enter coil block magnetic field I and form medium magnetic field (magnetic field II) during assembling.The magnetic field temperature of this kind of magnetic induction sensor equals magnetic field I and adds magnetic field II, and the center line of inductive coil assembly two groups of coils distributes the center line of alignment two groups of gear rings.Form respectively front moving-coil inductance value design load and rear quiet circle inductance value design load, and two-value is equal.All ferromagnetic mediums are all nonlinear mediums, and air or polypropylene are non-ferromagnetic mediums.Only have non-ferromagnetic medium linearly, so the stable with consistent of magnetic field inductance value will be kept, in design, specified the designed distance keeping non-ferromagnetic medium in two groups of gear rings.The magnetic hysteresis of non-ferromagnetic medium and area have corresponding linear relationship.So flute profile is the uniform trapezoidal or rectangle of standard in three former designs of gear ring.So, the teeth groove of three gear rings is made into the camber of standard from trapezoidal or rectangle, do not changing the linear relationship of medium, keeping original media area and teeth groove under the condition of the uniform feature of gear ring, the gear ring of arc shaped groove is also on the non-contact torque sensor that can be useful in.
In the gear ring of above-mentioned non-contact torque sensor, described teeth groove is semicircular arc.Semicircular arc is easy to process, and size easily controls.
In the gear ring of above-mentioned non-contact torque sensor, the spacing between described two adjacent teeth groove equals the 1.5-2 of the A/F of teeth groove doubly.
In the gear ring of above-mentioned non-contact torque sensor, the material of described body is 20CrMnTi steel.20CrMnTi steel is cemented steel of good performance, and quenching degree is high.There is hard and wear-resisting surface and tough and tensile heart portion after carburizing and quenching.Have higher low-temperature impact toughness, weldability is medium.After normalizing, machinability is good, and special machining deformation is small.Be less than the bearing at a high speed of 30mm for the manufacture of cross section, medium or heavy load impacts and the strength member of friction, as gear, gear ring, gear shaft cross etc.
A ring gear machining method for non-contact torque sensor, it is characterized in that, it comprises the steps:
A, selection, blanking: choose the tubing identical with gear ring internal-and external diameter, cut into the blank of predetermined length by tubing; Cutting machine can be used to be cut off by tubing, and reserved process redundancy.
B, clamping: the end face of two sections of blanks is fitted and is coaxially fixed on drilling machine, the sidewall of blank is just to drill bit; Fixture requires two semi-manufacture coaxially to be fixed and two end faces can fit tightly together, and fit tightly is the degree of accuracy guaranteeing to improve in subsequent processing teeth groove processing together.
C, boring: the center line being boring with the boundary line of two blank laminatings, hole, after drilling a hole, by two sections of blank rotating in same direction equal angular, institute's gyration equals the number in 360 °/hole, is rotated further blank and boring until to have bored institute porose by specification.Take boundary line as the center line of boring, the teeth groove so processed is symmetrical consistent, and equal portions boring in semi-manufacture circumference, make teeth groove can circumference uniform.
In the ring gear machining method of above-mentioned non-contact torque sensor, the tubing in described steps A is cold drawn tubing.The stability of material of cold drawn tubing is high, can ensure machining precision.
In the ring gear machining method of above-mentioned non-contact torque sensor, after described steps A, carry out grinding end face.By needing the end face lathe car processing teeth groove put down and polish, the end face of two tubing processed can be fit together better.
In the ring gear machining method of above-mentioned non-contact torque sensor, after described step C, carry out fraising technique.After boring, the edge of Hui Kong leaves more burr, removes burr by fraising technique.
In the ring gear machining method of above-mentioned non-contact torque sensor, the product after described blank machine-shaping can be heel teeth circle or middle gear ring.Because heel teeth circle is identical with the teeth groove of middle gear ring, therefore once can complete the manufacture of heel teeth circle and middle gear ring simultaneously.
In the ring gear machining method of above-mentioned non-contact torque sensor, in described step C the axial line of drill bit and the axial line of blank perpendicular.
Compared with prior art, the gear ring quality of this non-contact torque sensor is high, and size easily controls, its job operation effectively can reduce manufacturing cost, ensure the machining precision of teeth groove, reach the technical requirement of non-contacting sensor, make its serviceability more stable and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of gear ring.
Fig. 2 is the structural representation after two gear ring match-drill.
In figure, 1, body; 2, teeth groove; 3, boundary line.
Embodiment
As shown in Figure 1, the gear ring of non-contact torque sensor comprises body 1 in a tubular form, and the end of body 1 radially offers curved teeth groove 2, teeth groove 2 there are 8 and circumference uniform distribution on end face.
Specifically, as shown in Figure 2, teeth groove 2 is in semicircular arc, and the material of gear ring is 20CrMnTi steel.Teeth groove 2 number is 8 and circumferentially uniform, and the spacing between two adjacent teeth groove 2 equals the A/F 1.5-2 of teeth groove 2 doubly.
The ring gear machining method of this non-contact torque sensor comprises the steps:
A, employing cutting off machine cut cold drawn tubing;
B, employing lathe carry out turning process to the end face of blank;
B, employing grinding machine polish the end face after turning;
D, design and produce the fixture of standard;
E, two blanks are fixed on the fixture of drilling machine, make it coaxially fixing and end face tightly pastes mutually dead;
F, centered by the boundary line of both ends of the surface, line circumference is somely equally holed, the axial line of drill bit and the axial line of body perpendicular;
The burr produced after g, cleaning boring, teeth groove machines, and obtains finished product gear ring.
This ring gear machining method cost is low, and manufacturing procedure is simple, and controllability is high, and the gear ring dimensional accuracy processed through above-mentioned steps is high, and teeth groove is evenly distributed.During assembling, a heel teeth circle and middle gear ring are fixed on intermediate shaft, and another heel teeth circle is fixed on output shaft.The advantage of this non-contacting sensor is contactless, not wearing and tearing, long service life.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the terms such as body 1, teeth groove 2, boundary line 3 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (8)
1. the gear ring of a non-contact torque sensor, comprise body (1) in a tubular form, it is characterized in that, on the end face of described body (1), circumference offers curved teeth groove (2), described teeth groove (2) is in semicircular arc, and the arc axle center of described teeth groove (2) overlaps with the radial direction of body (1) and is distributed on the sidewall of body (1).
2. the gear ring of non-contact torque sensor according to claim 1, is characterized in that, the spacing between described two adjacent teeth groove (2) equals the 1.5-2 of the A/F of teeth groove (2) doubly.
3. the gear ring of non-contact torque sensor according to claim 1 and 2, is characterized in that, the material of described body (1) is 20CrMnTi steel.
4. a ring gear machining method for non-contact torque sensor, it is characterized in that, it comprises the steps:
A, selection, blanking: choose the tubing identical with gear ring internal-and external diameter, cut into the blank of predetermined length by tubing, carry out grinding end face;
B, clamping: the end face of two sections of blanks is fitted and is coaxially fixed on drilling machine, the sidewall of blank is just to drill bit;
C, boring: the center line taking the boundary line (3) of two blank laminatings as boring, hole, after drilling a hole, by two sections of blank rotating in same direction equal angular, described angle equals the number in 360 °/hole, is rotated further blank and boring until to have bored institute porose by specification.
5. the ring gear machining method of non-contact torque sensor according to claim 4, is characterized in that, the tubing in described steps A is cold drawn tubing.
6. the ring gear machining method of the non-contact torque sensor according to claim 4 or 5, is characterized in that, carries out fraising technique after described step C.
7. the ring gear machining method of non-contact torque sensor according to claim 6, is characterized in that, the product after described blank machine-shaping can be heel teeth circle or middle gear ring.
8. the ring gear machining method of non-contact torque sensor according to claim 7, is characterized in that, in described step C the axial line of drill bit and the axial line of blank perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210275059.2A CN102759423B (en) | 2012-08-04 | 2012-08-04 | Gear ring of non-contactable torque sensor and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210275059.2A CN102759423B (en) | 2012-08-04 | 2012-08-04 | Gear ring of non-contactable torque sensor and processing method thereof |
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| Publication Number | Publication Date |
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| CN102759423A CN102759423A (en) | 2012-10-31 |
| CN102759423B true CN102759423B (en) | 2015-02-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844306A (en) * | 2010-06-17 | 2010-09-29 | 株洲齿轮有限责任公司 | Processing method of annular gear of thin-wall member |
| CN202165474U (en) * | 2011-06-30 | 2012-03-14 | 陈义明 | Movable gear coupling |
| CN102528406A (en) * | 2012-03-13 | 2012-07-04 | 江国辉 | Method for processing automobile synchronizer gear ring blank |
| CN102528387A (en) * | 2010-12-31 | 2012-07-04 | 大连冶金轴承股份有限公司 | Method for machining yawing gear ring |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002098598A (en) * | 2000-09-21 | 2002-04-05 | Koyo Seiko Co Ltd | Manufacturing method of coronal part for torque sensor |
| CN2709710Y (en) * | 2004-02-19 | 2005-07-13 | 刘运武 | Drive gear capable of changing gear and without noise |
| CN102581579B (en) * | 2012-03-30 | 2014-01-15 | 湖南衡利重工机械有限公司 | Process for producing standard sections of tower cranes |
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- 2012-08-04 CN CN201210275059.2A patent/CN102759423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844306A (en) * | 2010-06-17 | 2010-09-29 | 株洲齿轮有限责任公司 | Processing method of annular gear of thin-wall member |
| CN102528387A (en) * | 2010-12-31 | 2012-07-04 | 大连冶金轴承股份有限公司 | Method for machining yawing gear ring |
| CN202165474U (en) * | 2011-06-30 | 2012-03-14 | 陈义明 | Movable gear coupling |
| CN102528406A (en) * | 2012-03-13 | 2012-07-04 | 江国辉 | Method for processing automobile synchronizer gear ring blank |
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