CN101395055B - Torque sensor - Google Patents
Torque sensor Download PDFInfo
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- CN101395055B CN101395055B CN200780007623XA CN200780007623A CN101395055B CN 101395055 B CN101395055 B CN 101395055B CN 200780007623X A CN200780007623X A CN 200780007623XA CN 200780007623 A CN200780007623 A CN 200780007623A CN 101395055 B CN101395055 B CN 101395055B
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Abstract
Detection coils (15p, 15q) detect a change in magnetic reluctance between each window (23a) of a cylindrical member (23) made of a non-magnetic material and an output shaft (2) made of a magnetic material, and steering torque is detected by detecting the change in magnetic reluctance as a change in the inductance of detection coils (15p, 15q). Coil yokes (16P, 16Q) are coaxially and rotatably disposed on the outer periphery of the cylindrical member (23), and the L-shaped forward ends of output terminals (15a1, 15a2) are inserted in through-holes (18). The construction facilitates assembly of the detection coils into a gear box and enables the forward ends of the output terminals to be accurately arranged. The forward ends of the output terminals are on the inside of the movement paths of the outer periphery of terminal holding parts (16P1, 16Q1), so that interference of the output terminals with other parts is prevented.
Description
Technical field
The present invention relates to be used for detecting the torque sensor of moment of torsion (torque), and more particularly, relate to the structure of the torque sensor of the electric power steering apparatus that is applied to vehicle through reversing between input shaft and output shaft (torsion).
Background technology
The electric power steering apparatus that is used for vehicle has such structure so that detect and be used for steering tiller is connected in the steering torque that produced on the steering shaft of steering hardware, controlling the output of motor and through another speed reduction gearing the propulsive effort of motor is transferred to steering shaft based on this steering torque to be detected with by the speed that speed sensor detects, thereby suitably helps the steering torque of steering tiller.
Being used for the control setup of electric power steering apparatus, a plurality of circuit need be provided, for example, be used to detect the moment of torsion testing circuit of steering torque; Be used for controlling the control circuit of the size of current of electric based on this steering torque to be detected; Be used for through based on the determined duty ratio of controlling valu from the current of electric of control circuit output; The motor-drive circuit of drive motor; And corresponding circuit assembles a plurality of circuit modules such as sensor assembly, control module and power module, and they individually are arranged near the gear case of turning facilities.But, the problem that increases when having number of components and assembler.For this reason, circuit module further compiles and is connected in the gear case of turning facilities.
On the other hand, known torque sensor with this structure, so that use magnetic test coil to be used for detecting magnetic resistance along with variation inductance, this magnetic resistance changes according to the windup-degree that are connected in the torsion bar of steering shaft; Setting is held near the bobbin frame of the magnetic test coil of gear case (coilyoke); And when using when having the gear case of said structure, the terminal of magnetic test coil is connected in circuit module (seeing patent documentation 1).
Fig. 8 is the cutaway view that the gear case with said structure is shown, and Fig. 9 illustrates the cutaway view of amplification that the terminal that is used for magnetic test coil is connected in the connecting bridge of circuit module.
With reference to figure 8 and Fig. 9, will provide briefly bright to the structure of moment of torsion test section and operation.Be arranged in the shell 101 with output shaft 103 through torsion bar 104 input shafts 102 connected to one another, and output shaft 103 is supported through ball-bearing casing 105a and 105b rotationally.Input shaft 102, torsion bar 104 and output shaft 103 are provided with coaxially, and input shaft 102 and torsion bar 104 key each other are connected, and torsion bar 104 is sold each other with output shaft 103 and is connected.
Turbine 106 is connected in output shaft 103, and is meshed with the worm screw 107b of the axle 107a that is connected in motor 107.
Comprise by non-magnetic material constituting and the cylindrical parts 108 of a plurality of window 108a that are provided with the interval of rule along circumferencial direction and 108b is fixed in the end of axle sleeve 102A that this axle sleeve 102A is fixed in the end of input shaft 102 such as aluminium.On the other hand, output shaft 103 is made up of magnetic material and has a plurality of outshot 103A and a 103B, and these a plurality of outshot 103A and 103B are formed on the window 108a and the corresponding position of 108b with cylindricity parts 108.And, comprise that the bobbin frame 109A of magnetic test coil L1 and L2 and 109B are arranged on the excircle of the cylindrical member 108 on the shell 101 coaxially.
Through this structure; When rotational force acts on 102 last times of input shaft; This rotational force is delivered to output shaft 103 through this torsion bar 104; And reverse owing to what on torsion bar 104, produce; On the window 108a of the cylindrical parts on the input shaft side 108 and 108b and on 103A on the outshot on the output shaft side and 103B, produce displacement; And the outshot 103A on output shaft 103 sides and the area of 103B increase or reduce, and this outshot 103A and 103B are made up of a plurality of magnetic materials and window 108a and 108b through the cylindrical parts on input shaft 102 sides that is made up of non-magnetic material expose, and increase of the inductance of magnetic test coil L1 and L2 or minimizing.Through detecting the variation inductance in magnetic test coil L1 and L2, can detect the size of reversing that on torsion bar 104, produces, that is, act on the size of the moment of torsion on the input shaft 102.
To the connecting bridge that be used for the terminal of magnetic test coil is connected in circuit module be described with reference to figure 9.
The circuit card of 114 indication circuit modules, and the terminal pins of 115 and 116 expression magnetic test coil L1 and L2.Like clear illustrating among Fig. 9, the terminal of magnetic test coil and circuit card are provided with along the direction of the axis centre of input shaft and output shaft abreast, and this depends on the structure of magnetic test coil and circuit card.
Patent documentation 1:JP-A-9-1012122
Summary of the invention
The problem that solves
But, utilizing this structure, the lead-out terminal of magnetic test coil L1 and L2 stretches out towards the circuit card of circuit module vertically.As a result, the external diameter of bobbin frame 109A increases, the feasible height that need reduce the lead-out terminal of magnetic test coil.
And, when two magnetic test coils are installed in the shell, utilize the rotation at the axle center that centers on input shaft and output shaft that this two magnetic test coils are installed.For this reason, drg must be provided.And, for the lead-out terminal with magnetic test coil is connected in the circuit card of circuit module, must be arranged on the angle on the rotation direction of lead-out terminal with high precision.
And when as described above, circuit card is along the direction at the axle center of input shaft and output shaft when being provided with abreast, the input shaft of gear case and output shaft axially on the length increase.In the time need in little engine room, gear case being set, there is defective, that is, produce shortcoming, and be difficult to fully keep the cushioning stroke of damper mechanism about the space, this damper mechanism has to be arranged on the middle part of steering shaft.The objective of the invention is to address these problems.
The scheme of dealing with problems
In order to deal with problems, provide a kind of being used for to comprise through the torque sensor that detects moment of torsion that reverses between input shaft and the output shaft:
Be used to detect two magnetic test coils of moment of torsion, and
Be connected in the lead-out terminal of magnetic test coil and handle from the control module of the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft that is provided with coaxially and output shaft,
Said magnetic test coil is provided with around the axle center in shell rotationally, in shell, holds said input shaft and output shaft,
And wherein, said two magnetic test coils are contained in the bobbin frame respectively, and two bobbin frames comprise the rotation adjustment component that is used to adjust mutual rotational angle.
And preferably, said bobbin frame comprises the terminal retaining part of the lead-out terminal that is used to keep said magnetic test coil, and said rotation adjustment component is formed in this terminal retaining part.
And; Preferably; The lead-out terminal of magnetic test coil have the foundation that remains in the said terminal retaining part and with respect to this foundation with right-angled bend and form end (tip) part of L-shaped shape, and this end portion is arranged on the inboard of the motion track on the excircle of said terminal retaining part.
According to a further aspect of the invention, a kind of torque sensor of electric power steering apparatus is provided, comprises:
Two magnetic test coils are used for changing and detecting through reversing between input shaft that is provided with coaxially that steering torque produced and the output shaft along with inductance, and
Be connected in the lead-out terminal of said magnetic test coil and handle from the control module of the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft that is provided with coaxially and output shaft,
Said two magnetic test coils are provided with around the axle center in shell rotationally, and output shaft is contained in the said shell,
Said two magnetic test coils are contained in the bobbin frame respectively, and two bobbin frames comprise the rotation adjustment component that is used to adjust mutual rotational angle.
And preferably, said bobbin frame comprises the terminal retaining part of the lead-out terminal that is used to keep said magnetic test coil, and said rotation adjustment component is formed in the said terminal retaining part.
And; Preferably; The lead-out terminal of said magnetic test coil have the foundation that remains on said terminal retaining part and with respect to foundation with right-angled bend and form the end portion of L-shaped shape, and said end portion is arranged on the inboard of the motion track on the excircle of said terminal retaining part.
According to a further aspect of the invention, a kind of torque sensor that is used for detecting through reversing between input shaft and the output shaft moment of torsion is provided, comprises:
Be used to detect the magnetic test coil of moment of torsion, and
Be used to handle control module from the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft that is provided with coaxially and output shaft, and
The lead-out terminal of said magnetic test coil has the end portion perpendicular to the circuit card setting of control module.
Preferably, the lead-out terminal of said magnetic test coil is made up of foundation that is connected in magnetic test coil and the end portion that is connected in the circuit card of control module, and said end portion with respect to said foundation with right-angled bend and form L-shaped shape.
And preferably, the said lead-out terminal of said magnetic test coil is the round pin with round section.
According to a further aspect of the invention, a kind of torque sensor of electric power steering apparatus is provided, comprises:
Two secondary magnetic test coils are used for detecting along with variation inductance the reversing between input shaft that is provided with coaxially and output shaft that produces through steering torque, and
Be used to handle control module from the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft and output shaft, and
The lead-out terminal of said magnetic test coil has the end portion perpendicular to the circuit card setting of control module.
Preferably, the lead-out terminal of said magnetic test coil is made up of foundation that is connected in magnetic test coil and the end portion that is connected in the circuit card of control module, and said end portion with respect to said foundation with right-angled bend and form L-shaped shape.
And preferably, the lead-out terminal of said magnetic test coil is the round pin with round section.
And preferably, the said lead-out terminal of said magnetic test coil has with respect to foundation with right-angled bend and through using crooked formed punch and punch die to form the end portion of L-shaped shape.
Advantage of the present invention
As stated, according to first to fourth aspect of the present invention, torque detection coil is provided with around the axle center in shell rotationally, and this shell holds input shaft and output shaft.Therefore, can be in assembling assemble during the driving torque magnetic test coil, so that can improve operability.
Two bobbin frames that are used to hold magnetic test coil comprise the rotation adjustment component of the rotational angle that is used to adjust each other.Therefore, can on the rotation direction of lead-out terminal, angle be set with high precision.
And the lead-out terminal of said magnetic test coil has the foundation that remains in the terminal retaining part, and end portion is bent with the right angle with respect to foundation, and therefore forms L-shaped shape.Therefore, can reduce the external diameter of bobbin frame.
And, the end portion of the lead-out terminal of magnetic test coil is arranged on the inboard of the motion track (moving track) on the excircle of terminal retaining part.As a result, through in advance miscellaneous part being arranged on the outside of motion track, therefore,, also can eliminate interference with miscellaneous part even magnetic test coil rotates.
The 5th aspect of the present invention relates to the torque sensor of electric power steering apparatus, and the structure of the magnetic test coil of this torque sensor is identical with the structure of the magnetic test coil of the torque sensor of first aspect of the present invention.Therefore, produce the advantage identical with first aspect of the present invention.
In torque sensor according to a ninth aspect of the invention, the circuit card of control module is set to the direction perpendicular to the axle center of input shaft and output shaft.Therefore, can improve utilization of space.When the lead-out terminal of the magnetic test coil of torque sensor has the shape of being bent to and during the end portion that forms perpendicular to the circuit card of control module, can easily directly magnetic test coil be connected in control module.
In the torque sensor of according to a twelfth aspect of the invention electric power steering apparatus, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft and output shaft.Therefore, utilization of space can be improved, and the cushioning stroke of the damper mechanism of steering hardware can be preserved for fully.The lead-out terminal of the magnetic test coil of torque sensor is bent to shape, and therefore forms the circuit card perpendicular to control module.Therefore, can easily directly magnetic test coil be connected in control module.
And the round pin with round section is used for the lead-out terminal of magnetic test coil.As a result, when using crooked formed punch and punch die in the bending machining of part endways, therefore, round pin contacts with the punch die line.Therefore, can carry out bending machining with high precision.
Description of drawings
Fig. 1 is the decomposition diagram that the keystone configuration part of electric power steering apparatus is shown;
Fig. 2 is used to explain at the torque detection coil of the electric power steering apparatus shown in Fig. 1 and the transparent view of relative parts;
Fig. 3 is the cutaway view vertically of structure that is used for explaining the magnetic test coil of the torque sensor that is arranged on gear case;
Fig. 4 is the cutaway view along the A-A line intercepting of Fig. 3 that is used for explaining the structure of magnetic test coil;
Fig. 5 is used to explain be used to adjust by bobbin frame around the rotation at axle center and the view of the structure of the rotational angle that forms;
Fig. 6 is the front elevation of bending machining that is used to explain the lead-out terminal of magnetic test coil;
Fig. 7 is the cutaway view along the A-A line intercepting of Fig. 6 of bending machining that is used for explaining the lead-out terminal of magnetic test coil;
Fig. 8 is the cutaway view of instance of structure that is used to explain the main portion of conventional electric power steering apparatus; And
Fig. 9 be illustrated in the electric power steering apparatus of the routine shown in Fig. 8 the cutaway view of amplification of magnetic test coil of connecting bridge and torque sensor of circuit card.
Reference numeral
11 gears case (gear case of turning facilities)
The 11a motor connects the surface
11b box-like cuboid
1,1b1 first plane
1,1b2 second plane
11c semicircle box-like parts
The 11d cylindrical member
The 11e opening portion
The 11f guide member
The 11g compacting part
12 motors
13 module connection member
14a signal wire (SW) adaptor union
The 14b power connector
14c motor terminal adaptor union
15,15p, 15q magnetic test coil (torque detection coil)
15a, 15a1,15a2 lead-out terminal (lead-out terminal of torque detection coil)
16P, the 16Q bobbin frame
16P1,16Q1 terminal retaining part
18 through holes (connecting bridge of circuit card)
The torque detection coil of 215 torque sensors
The lead-out terminal of 215a torque detection coil
215a1 foundation (foundation of the lead-out terminal of torque detection coil)
215a2 end portion (end portion of the lead-out terminal of torque detection coil)
221 substrates
222 crooked formed punch
223 punch dies
The PM power module
The CM control module
The FM frame module
The specific embodiment
Below, will the present invention be described based on the embodiment that is applied to electric power steering apparatus.Fig. 1 is the transparent view that the keystone configuration decomposition partly of electric power steering apparatus is shown, and Fig. 2 is the transparent view that torque detection coil and relative parts are shown.For fear of the complicacy of accompanying drawing, steering shaft, connected input shaft and output shaft and speed reduction gearing are not shown.
In Fig. 1 and Fig. 2, the gear case of 11 expression turning facilities, 12 expression motors.The output shaft that be connected in the cylindrical input shaft of steering shaft, is arranged on torsion bar wherein and is connected in torsion bar and is provided with coaxially with input shaft coaxially; The perforation along the direction of arrow a by in the gear case 11 is supported rotationally, and unshowned turbine is connected in said output shaft.Input shaft and output shaft side are represented in the bottom right of arrow a and upper left side.Because the structure of input shaft, the similar of torsion bar and output shaft and torque sensor is in the structure with reference to the routine of figure 8 and 9 descriptions, and knows, and its detailed description will be omitted.
The flange 12a of motor 12 constitutes the motor that is fixed in gear case 11 and connects surperficial 11a, and the axle of motor 12 constitutes and can be connected with the scroll bar axle that is contained in gear case 11, and this scroll bar axle is not shown.And clearly, worm screw and turbine are configured to the engagement that keeps suitable.
Will be with reference to Fig. 1 and 2, the structure and the layout of each parts described.Gear case 11 has the first half that forms the cuboid 11b that is box-like; Worm screw is contained among this box-like cuboid 11b; Be formed with the first plane 11b1 on the outside at the axle center that is arranged on the motor shaft that is connected in worm shaft; With the second plane 11b2 on the input shaft side, when when the mate of worm screw and turbine is observed, this second plane 11b2 and the first plane 11b1 with right angle intersection with L-shaped shape; And the first plane 11b1 and the be connected surface of the second plane 11b2 as circuit module, this will be described below.
And the first plane 11b1 is arranged on mate and separates in the position farthest, and is when when the mate of worm screw and turbine is observed, crossing in the outside at the axle center of motor shaft with the plane at the axle center that comprises mate and motor.
The latter half of gear case 11 forms the box-like parts 11c of semicircle, and turbine is contained among these semicircle box-like parts 11c, and the latter half of gear case 11 forms with the cuboid 11b that is box-like.The box-like parts 11c of semicircle is provided with the ball-bearing casing of cylindrical parts 11d and unshowned input shaft; This cylindrical parts 11d is used to support torque sensor; This torque sensor is used for detecting driving torque through reversing of torsion bar; And this torsion bar is connected in output shaft with input shaft, and the lead-out terminal 15a of the torque detection coil 15 of this torque sensor is exposed to opening portion 11e, and this opening portion 11e is set to the second plane 11b2 near cylindrical parts 11d.
It is relative with two surfaces that module connection member 13 is connected to, and, be set to the first plane 11b1 and the second plane 11b2 of the gear case 11 of L-shaped shape, and these module connection member 13 usefulness synthetic resin integrally forms L-shaped shape that is.Circuit module; Promptly; By the power module PM that constitutes the motor drive power supply circuit that forms of switching transistor, wherein comprise the control module CM of control circuit and moment of torsion testing circuit and comprise power circuit and the frame module FM of other circuit components, be installed in the module connection member 13.
The input shaft, torsion bar and the output shaft that are connected in steering shaft are supported in the gear case 11 rotationally; And the turbine that constitutes speed reduction gearing is connected in output shaft, and will also be supported rotationally through the bearing that is arranged in the gear case 11 with the turbine engaged worm.
And; Motor 12 is installed by this way; Promptly when motor 12 is fixed in the motor mounting surface 11a of gear case 11; The axle of motor 12 is connected in the worm screw that is supported in the gear case 11, and output shaft is rotated and drives through speed reduction gearing, and this speed reduction gearing comprises worm screw and the turbine that the driving operations through motor 12 drives.
And; Each circuit module of power module PM, control module CM and frame module FM is done to so that freely involved, and the power supply terminal 12 of motor 12 is done to so that freely be comprised among the motor terminal adaptor union 14c that is arranged among the frame module FM.
Control module CM is connected in the module connection member 13 on the outside that is arranged on frame module FM.The control signal terminal of control module CM is electrically connected on the control signal corresponding terminal of frame module FM; And; The lead-out terminal 15a of magnetic test coil 15 that is exposed to the torque sensor of opening portion 11e also is electrically connected on the corresponding terminal of control module CM, and this opening portion 11e is near the second plane 11b2 on the input shaft side of gear case 11.
With screw the motor that motor 12 is fixed in gear case 11 is connected surperficial 11a.The turning cylinder of motor 12 is connected in the scroll bar axle that is contained in the gear case 11, and the power supply terminal of motor 12 is electrically connected through the motor terminal adaptor union 14c that is fixed in frame module FM.
Then, the magnetic test coil 15 that provides control module CM and torque sensor is installed in the explanation in the shell, and this shell is the structure according to characteristic of the present invention.
The circuit card that is connected in the control module CM of module connection member 13 is set on the plane with the axle central vertical of the input shaft, torsion bar and the output shaft that are provided with coaxially.On the other hand, the magnetic test coil 15 of torque sensor is provided with around being arranged on the output shaft among the cylindrical parts 11d.
Fig. 3 is the axial cutaway view of structure that is used for explaining the magnetic test coil 15 of the torque sensor that is arranged on gear case, and Fig. 4 is the cutaway view of the A-A line intercepting in Fig. 3.In Fig. 3 and 4,21 expression output shafts, 22 expression torsion bars.On the excircle of output shaft 21, have by non-magnetic material and constitute and the cylindrical parts 23 of a plurality of window 23a of being provided with the interval of rule along circumferencial direction is fixed in the end of unshowned input shaft such as aluminium.
On the other hand, output shaft 21 is made up of magnetic material, and a plurality of outshot is formed in the corresponding position of window 23a with cylindrical parts 23.
Because this structure and above-mentioned know technological identical with reference to figure 8 and 9; Its explanation will be omitted; In said structure, when applying steering torque, reverse through what on torsion bar 22, produce; The magneto-resistive variation that between the window 23a of the cylindrical parts that is made up of non-magnetic material 23 and the output shaft 21 that is made up of magnetic material, produces is counted as magnetic test coil 15 variation inductance of (comprising two magnetic test coil 15p and 15q), so that detect steering torque.
And; Axially being arranged on coaxially on the excircle of cylindrical parts 23 of the output shaft 21 of the bobbin frame 16Q that wherein holds the bobbin frame 16P of magnetic test coil 15p and wherein hold magnetic test coil 15q in the gear case 11; And the lead-out terminal 15a1 of magnetic test coil 15p and the lead-out terminal 15a2 of magnetic test coil 15q have such structure; In this structure; The end portion that is bent into into L-shaped shape is protruding from the opening portion 11e (see figure 1) that is arranged on the gear case 11 respectively, and in the corresponding through hole 18 of the circuit card of insertion control module CM.
The axle center that these two bobbin frame 16P and 16Q center on the output shaft in the gear case 11 is kept rotationally, and is kept by guide member 11f in the gear case and compacting part 11g along an axial left side and right half.
When connecting into bobbin frame 16P and 16Q in the gear case 11; Insert the aligning in the through hole 18 of circuit card of control module CM for the end portion of the lead-out terminal 15a (lead-out terminal 15a1 and 15a2) that easily carries out magnetic test coil 15, bobbin frame 16P and 16Q keep around a center of output shaft with being rotated.Even bobbin frame 16P and 16Q rotate, and the end portion of the shape of lead-out terminal 15a (lead-out terminal 15a1 and 15a2) is arranged on around the axle center on the inboard of motion track (S illustrates with circular arc) of lead-out terminal 15a.Be set at the miscellaneous part on the outside of the circular arc S in the gear case 11 through design, therefore, can prevent that bobbin frame 16P and 16Q and miscellaneous part from interfering.
Fig. 5 be used for explanation when bobbin frame 16P and 16Q around spool center during rotation, be used to adjust the view of the structure of rotational angle, and line R representes the direction of the mating surfaces of terminal retaining part 16P1 and 16Q1.
Mating surfaces along with the parallel direction of direction at the axle center of output shaft, and along the direction setting parallel with the turning cylinder of bobbin frame 16P and 16Q.
Direction along turning cylinder; Terminal retaining part 16P1 and the terminal retaining part 16Q1 of the lead-out terminal 15a2 of the magnetic test coil that is used for keeping being contained in bobbin frame 16Q of lead-out terminal 15a1 that is used for keeping being contained in the magnetic test coil of bobbin frame 16P has collision stage exponent part m and the n that is formed on the end face respectively; And through the collision stage exponent part m of terminal retaining part 16P1 and the collision stage exponent part n of terminal retaining part 16Q1; Bobbin frame 16P and 16Q collide each other; So that adjust pivot angle by this way; That is lead-out terminal 15a1 that, is contained in the magnetic test coil among the bobbin frame 16P and the lead-out terminal 15a2 that is contained in the magnetic test coil among the bobbin frame 16Q do not overlap each other.
Preferably, the end face of guide member 11f that can be in gear case and abut against between the bobbin frame 16P of this end face positioning element is provided, thus adjustment bobbin frame 16P is with respect to the pivot angle of guide member 11f.
Then, with the lead-out terminal 215a of the magnetic test coil 215 of description control module CM and torque sensor, they are the structures according to characteristic of the present invention.
The circuit card that is connected in the control module CM of module connection member 13 is set on the plane with the axle central vertical of the input shaft, torsion bar and the output shaft that are provided with coaxially.On the other hand, the magnetic test coil of torque sensor 215 is provided with around being arranged on the output shaft in the cylindrical parts, and the structure of torque sensor self is identical with above-mentioned conventional structure with reference to figure 8 and 9.
The lead-out terminal 215a of the magnetic test coil 215 of torque sensor forms L-shaped shape; This shape comprises the foundation of extending vertically from the external peripheral surface of magnetic test coil 215 and with respect to the end portion 215a2 (see figure 6) of foundation 215a1 with right-angled bend, and end portion 215a2 forms the circuit card perpendicular to control module CM.And lead-out terminal 215a is set to have the round pin of round section.
According to this structure; End portion 215a2 with round pin of round section can insert in its through hole 218 for the connecting bridge of the circuit card of control module CM along vertical direction, and magnetic test coil 215 and control module CM direct connection (see figure 1) easily.
Then, will the sweep of the lead-out terminal of magnetic test coil be described with reference to figure 6 and 7.Fig. 6 is the front elevation of sweep that is used to explain the lead-out terminal 215a of magnetic test coil, and Fig. 7 is the cutaway view of the A-A line intercepting in Fig. 6.
In Fig. 6,221 expressions are used for fixing the substrate of magnetic test coil 215,222 expression crooked formed punch, and 223 expressions are used to support the punch die of lead-out terminal 215a.Magnetic test coil 215 is fixed on substrate 221, and the foundation 215a1 of lead-out terminal 215a is from following support punch die 223.Then, crooked formed punch 222 is pushed downwards along the side surface of punch die 223, so that the end portion 215a2 of crooked lead-out terminal 215a.In Fig. 6, the end portion 215a2 of the lead-out terminal 215a shown in the with dashed lines forms with respect to the end portion of the foundation 215a1 shown in the heavy line with right-angled bend.
In this case, the part of lead-out terminal 215a is a round pin.Therefore, when the foundation 215a1 of lead-out terminal 215a through punch die 223 and by the time from following support, the foundation 215a1 of lead-out terminal 215a makes the cylindrical external peripheral surface of round pin contact with line with respect to the punch die plane of punch die 223.Because mating surfaces is little, can carry out bending with high precision.
Though provided the explanation of this embodiment; In this embodiment; Torque sensor according to the present invention is applied to electric power steering apparatus, but torque sensor obviously according to the present invention is not limited to be applied to electric power steering apparatus, but can be applied to the torque sensor of other mechanical equipments.
Though described the present invention in detail with reference to concrete embodiment, obviously for a person skilled in the art, can make various changes and modification and do not deviate from the spirit and scope of the present invention.
The application is based on the Japanese patent application (JP-A-2006-055718) of Japanese patent application of submitting on March 2nd, 2006 (JP-A-2006-055717) and submission on March 2nd, 2006, and its content is combined for reference.
Industrial applicibility
In torque sensor; Torque detection coil is constituted as along the direction at the axle center of input shaft and output shaft rotatable; And; The parts that are used to adjust rotational angle are set to make the structure of the lead-out terminal of magnetic test coil to have high precision, and torque detection coil can easily be installed in the gear case, and the lead-out terminal of magnetic test coil can easily be connected in control module.
And, be set up direction according to the control module of torque sensor of the present invention perpendicular to the axle center of input shaft and output shaft.In the time of in the gear case that control module is mounted thereto is arranged on little space, for example, in the engine room, space availability ratio is enhanced.In application, can keep the cushioning stroke of damper mechanism fully for electric power steering apparatus.The end portion that has the shape of being bent to and form owing to the output shaft of the magnetic test coil of torque sensor, easily direct connection magnetic test coil and control module perpendicular to the circuit card of control module.
Claims (7)
1. a torque sensor is used for detecting moment of torsion through reversing between input shaft and the output shaft, comprising:
Be used to detect two magnetic test coils of moment of torsion, and
Be connected in the lead-out terminal of said magnetic test coil and handle from the control module of the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is perpendicular to the direction setting at a center of input shaft that is provided with coaxially and output shaft,
Said magnetic test coil is provided with around said axle center in shell rotationally, and said input shaft and output shaft are contained in this shell,
Wherein, said two magnetic test coils are contained in the bobbin frame respectively, and two bobbin frames comprise the rotation adjustment component that is used to adjust mutual rotational angle,
Wherein, said bobbin frame comprises the terminal retaining part of the lead-out terminal that is used to keep said magnetic test coil, and
Said rotation adjustment component is formed in the said terminal retaining part,
And wherein, the lead-out terminal of magnetic test coil have the foundation that remains in the said terminal retaining part and with respect to said foundation with right-angled bend and form the end portion of L-shaped shape, and
Said end portion is arranged on the inboard of the motion track on the excircle of said terminal retaining part.
2. the torque sensor of an electric power steering apparatus comprises:
Two magnetic test coils are used for detecting along with variation inductance reversing between the input shaft that is provided with coaxially and the output shaft, and this reverses through steering torque and produces, and
Be connected in the lead-out terminal of said magnetic test coil and handle from the control module of the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft that is provided with coaxially and output shaft,
Said two magnetic test coils are provided with around said axle center in shell rotationally, and said input shaft and output shaft are contained in this shell, and
Said two magnetic test coils are contained in the bobbin frame respectively, and two bobbin frames comprise the rotation adjustment component that is used to adjust mutual rotational angle,
Wherein, said bobbin frame comprises the terminal retaining part of the lead-out terminal that is used to keep said magnetic test coil, and
Said rotation adjustment component is formed in the said terminal retaining part,
Wherein, the lead-out terminal of said magnetic test coil have the foundation that remains in the said terminal retaining part and with respect to said foundation with right-angled bend and form the end portion of L-shaped shape, and
Said end portion is arranged on the inboard of the motion track on the excircle of said terminal retaining part.
3. a torque sensor is used for detecting moment of torsion through reversing between input shaft and the output shaft, comprising:
Be used to detect the magnetic test coil of moment of torsion, and
Be used to handle control module from the detection signal of said magnetic test coil output;
Wherein, the circuit card of said control module is set to the direction perpendicular to the axle center of input shaft that is provided with coaxially and output shaft, and
The lead-out terminal of said magnetic test coil has the end portion perpendicular to the circuit card setting of control module,
Wherein, the lead-out terminal of said magnetic test coil is made up of foundation that is connected in said magnetic test coil and the terminal part branch that is connected in the circuit card of said control module, and
Said end portion with right-angled bend, and forms L-shaped shape with respect to said foundation.
4. torque sensor according to claim 3, wherein
The said lead-out terminal of said magnetic test coil is the round pin with round section.
5. the torque sensor of an electric power steering apparatus comprises:
Magnetic test coil is used for detecting along with variation inductance reversing between the input shaft that is provided with coaxially and the output shaft, and this reverses through steering torque and produces, and
Be used to handle control module from the detection signal of said magnetic test coil output;
Wherein, the circuit card of control module is set to the direction perpendicular to the axle center of said input shaft and output shaft, and
The lead-out terminal of said magnetic test coil has the end portion perpendicular to the circuit card setting of said control module,
Wherein, the lead-out terminal of said magnetic test coil is made up of basis that is connected in said magnetic test coil and the end portion that is connected in the circuit card of said control module, and
Said end portion with right-angled bend, and forms L-shaped shape with respect to said foundation.
6. the torque sensor of electric power steering apparatus according to claim 5, wherein
The said lead-out terminal of said magnetic test coil is the round pin with round section.
7. according to the torque sensor of claim 3 or according to the torque sensor of the electric power steering apparatus of claim 5, wherein
The said lead-out terminal of said magnetic test coil has with respect to foundation with right-angled bend and through using crooked formed punch and punch die to form the end portion of L-shaped shape.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP055717/2006 | 2006-03-02 | ||
| JP2006055718A JP5034266B2 (en) | 2006-03-02 | 2006-03-02 | Torque sensor |
| JP055718/2006 | 2006-03-02 | ||
| JP2006055717A JP5002981B2 (en) | 2006-03-02 | 2006-03-02 | Torque sensor |
| PCT/JP2007/053104 WO2007099818A1 (en) | 2006-03-02 | 2007-02-20 | Torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101395055A CN101395055A (en) | 2009-03-25 |
| CN101395055B true CN101395055B (en) | 2012-06-27 |
Family
ID=38551429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780007623XA Expired - Fee Related CN101395055B (en) | 2006-03-02 | 2007-02-20 | Torque sensor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5002981B2 (en) |
| CN (1) | CN101395055B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011084507A1 (en) * | 2011-06-10 | 2012-12-13 | Robert Bosch Gmbh | Steering system in a vehicle |
| CN102353488A (en) * | 2011-06-10 | 2012-02-15 | 王成 | Torque sensor |
| WO2015104766A1 (en) * | 2014-01-09 | 2015-07-16 | 日本精工株式会社 | Torque sensor and electric power-steering device |
| US9683905B2 (en) * | 2015-01-21 | 2017-06-20 | Ford Global Technologies, Llc | Transmission and transfer case with torque sensing |
| FR3072773B1 (en) | 2017-10-24 | 2020-09-25 | Continental Automotive France | TORQUE SENSOR FOR ROTATING ELEMENT USING FRICTION MECHANICAL COUPLING |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6398992A (en) * | 1986-10-15 | 1988-04-30 | 藤好 克聡 | Manufacture of socket pin for printed board |
| JP2003095117A (en) * | 2001-09-19 | 2003-04-03 | Hitachi Unisia Automotive Ltd | Electric power steering device |
| EP1541982A4 (en) * | 2002-08-26 | 2007-01-24 | Nsk Ltd | Electric power steering apparatus |
-
2006
- 2006-03-02 JP JP2006055717A patent/JP5002981B2/en active Active
-
2007
- 2007-02-20 CN CN200780007623XA patent/CN101395055B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007230413A (en) | 2007-09-13 |
| CN101395055A (en) | 2009-03-25 |
| JP5002981B2 (en) | 2012-08-15 |
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