CN1310405C - DC. motor and fuel pump using said motor - Google Patents
DC. motor and fuel pump using said motor Download PDFInfo
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- CN1310405C CN1310405C CNB2004100082224A CN200410008222A CN1310405C CN 1310405 C CN1310405 C CN 1310405C CN B2004100082224 A CNB2004100082224 A CN B2004100082224A CN 200410008222 A CN200410008222 A CN 200410008222A CN 1310405 C CN1310405 C CN 1310405C
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Abstract
本发明的直流电动机，具有：在与旋转轴大致正交的平面上具有接触面的整流子、与该整流子的接触面接触的电刷、具有板簧部和端子部的电刷支架，利用板材一体地形成所述板簧部和端子部，该板簧部对电刷进行保持、并在与旋转轴大致平行的方向上将电刷向整流子接触面进行推压，且端子部通过板簧部向电刷进行供电。通过使板簧部和端子部一体地构成，能减少电刷支架的零件数，实现电刷支架的小型化。本发明能减少使用于燃料泵等中的直流电动机的电刷支架的构成零件数，实现电刷支架的小型化。
The DC motor of the present invention has: a commutator having a contact surface on a plane substantially perpendicular to the rotation axis, a brush contacting the contact surface of the commutator, and a brush holder having a leaf spring portion and a terminal portion, and is utilized The plate material integrally forms the leaf spring portion that holds the brush and presses the brush toward the contact surface of the commutator in a direction substantially parallel to the rotation axis, and the terminal portion passes through the plate. The spring portion supplies power to the brushes. By integrally configuring the plate spring portion and the terminal portion, the number of parts of the brush holder can be reduced, and the size of the brush holder can be reduced. The present invention can reduce the number of constituent parts of a brush holder of a DC motor used in a fuel pump or the like, and achieve miniaturization of the brush holder.
Description
Technical field
The present invention relates to DC motor and uses its petrolift, for example is attached to the petrolift of the engine of lift-launch on automobile etc.
Background technology
This DC motor that is used for petrolift, for example the Japan Patent spy opens shown in the 2001-323856 communique, on an end that is installed on the armature on the rotating shaft, have commutator, on the plane of this commutator and rotating shaft direct cross, be formed with contact-making surface with brush.This DC motor has a plurality of brushes that contact with the contact-making surface of commutator, by being rotated to the armature coil power supply from these brushes, to the engine fueling.
But DC motor in the past as described shown in the communique, is connected with the current supply line that is known as pigtail (pig tail) to the power supply terminal and the brush of motor, and uses the brush spring that brush is pushed to the contact-making surface of commutator.In addition, on brush, set up brush is kept tube to the brush that the direction with rotating shaft parallel keeps, can in keeping tube, this brush keep movably, with the wearing and tearing of the contact-making surface of brush and commutator, can in this brush keeps tube, move and push to the contact-making surface of commutator all the time.
[patent documentation 1]
The Japan Patent spy opens the 2001-323856 communique, especially with reference to its Fig. 6, Fig. 7, Fig. 8, Figure 11 and explanation thereof.
But, relevant with brush in this DC motor in the past, used to comprise that current supply line, brush spring, brush that power supply terminal is connected with brush keep many parts of tube, so the brush retaining part has the unfavorable condition of maximization.And owing to use many parts, the error in conjunction with precision of these parts has the trend of increase during fabrication, is difficult to the brush retaining part is processed into stable size.
Summary of the invention
The object of the present invention is to provide the DC motor of the brush carriage after a kind of use improves such unfavorable condition and the petrolift of this motor of use.
DC motor of the present invention, its characteristics are to have: be installed on the rotating shaft and revolvable armature in magnetic field; Be installed on this armature, roughly have the commutator of contact-making surface on the plane orthogonal with described rotating shaft; The brush that contacts with the described contact-making surface of this commutator; The brush carriage that has plate spring part and portion of terminal, the described brush of maintenance and power to its; The brush carriage housing that keeps this brush carriage, utilize integrally formed described plate spring part of sheet material and portion of terminal, described plate spring part keep described brush and with the direction of described rotating shaft almost parallel on described brush is pushed to described contact-making surface, and described portion of terminal is powered to described brush by described plate spring part.
In addition, another DC motor of the present invention, its characteristics are to have: be installed on the rotating shaft and revolvable armature in magnetic field; Be installed on this armature, roughly have the commutator of contact-making surface on the plane orthogonal with described rotating shaft; The the 1st, the 2nd brush that contacts with the described contact-making surface of this commutator; The 1st brush carriage that keeps described the 1st brush and power to its; The 2nd brush carriage and the maintenance the described the 1st that keep described the 2nd brush and power to its, the brush carriage housing of the 2nd brush carriage, described each the 1st, the 2nd brush carriage, have and utilize integrally formed plate spring part of sheet material and portion of terminal, the described plate spring part of described the 1st brush carriage keeps described the 1st brush, and with the direction of described rotating shaft almost parallel on the 1st brush is pushed to described contact-making surface, and the described portion of terminal of described the 1st brush carriage is powered to described the 1st brush by this plate spring part, and, the described plate spring part of described the 2nd brush carriage keeps described the 2nd brush, and with the direction of described rotating shaft almost parallel on the 2nd brush is pushed to described contact-making surface, and the described portion of terminal of described the 2nd brush carriage is powered to described the 2nd brush by this plate spring part.
In addition, petrolift of the present invention has: the yoke (ヨ one ケ) that forms the tubular in magnetic field in inside; Be configured in the rotating shaft on the center line of this yoke; The armature that be installed on this rotating shaft, can in described magnetic field, be rotated; Be installed on the end of this armature and roughly have the commutator of contact-making surface on the plane orthogonal with described rotating shaft; The a plurality of brushes that contact with the described contact-making surface of this commutator; Support an end of described rotating shaft and cover the 1st housing of described a plurality of brushes; Be configured on the 1st housing a plurality ofly, respectively described a plurality of brushes are kept and to their the power supply brush carriage; The 2nd housing that is installed in the impeller on the other end of described rotating shaft and covers this impeller and the other end of described rotating shaft is supported, utilize the rotation of described impeller, in the inner space of described yoke, make the fuel circulation, and the contact portion of described commutator and a plurality of brushes is immersed in this fuel, its characteristic point is, described a plurality of brush carriage has respectively and utilizes integrally formed plate spring part of sheet material and portion of terminal, described plate spring part keeps brush corresponding in described a plurality of brushes, and with its with the direction of described rotating shaft almost parallel on push to described contact-making surface, in addition, described portion of terminal is powered by described plate spring part corresponding brush in described a plurality of brushes.
In DC motor of the present invention, use brush carriage with plate spring part and portion of terminal, utilize sheet material to form this plate spring part and portion of terminal.This plate spring part, keep brush and with the direction of described rotating shaft almost parallel on the contact-making surface of this brush to commutator pushed.In addition, portion of terminal is powered to brush by plate spring part.Owing to utilize integrally formed plate spring part and portion of terminal, so can reduce the part number that is used to keep brush, brush carriage can be made more small-sized, and because they are formed, so can improve because of their dimensional discrepancy that causes in conjunction with error, the stabilisation that can realize the size of brush carriage.With this, can make more miniaturization of DC motor, also can improve its dimensional accuracy.
In addition, in another DC motor of the present invention, the 1st, each of the 2nd brush carriage, have and utilize integrally formed plate spring part of sheet material and portion of terminal, the described plate spring part of described the 1st brush carriage keeps described the 1st brush, and with the direction of described rotating shaft almost parallel on the 1st brush is pushed to described contact-making surface, and the described portion of terminal of described the 1st brush carriage is powered to the 1st brush by this plate spring part, and, the described plate spring part of described the 2nd brush carriage keeps described the 2nd brush, and with the direction of described rotating shaft almost parallel on the 2nd brush is pushed to described contact-making surface, and the described portion of terminal of described the 2nd brush carriage is powered to the 2nd brush by this plate spring part.On each brush carriage of the 1st, the 2nd, owing to utilize integrally formed plate spring part of sheet material and portion of terminal, so can reduce the part number that is used to keep brush, brush carriage can be made more small-sized, and because they are formed, thus can improve because of with they combine the dimensional discrepancy that error causes, the stabilisation that can realize the size of brush carriage.With this, can make more miniaturization of DC motor, also can improve its dimensional accuracy.
In petrolift of the present invention, a plurality of brush carriages have respectively and utilize integrally formed plate spring part of sheet material and portion of terminal, described plate spring part the brush of correspondence is kept and with its with the direction of described rotating shaft almost parallel on push to described contact-making surface, and described portion of terminal is powered to the brush of correspondence by plate spring part.Owing to utilize each plate spring part and the portion of terminal of the integrally formed a plurality of brush carriages of sheet material, so can reduce the part number that each brush corresponding with a plurality of brushes keeps usefulness, brush carriage can be made more small-sized, in addition, by they are formed, so can improve because of their dimensional discrepancy that causes in conjunction with error, the stabilisation that can realize the size of brush carriage.With this, can make more miniaturization of petrolift, also can improve its dimensional accuracy.
Description of drawings
Fig. 1 is the longitudinal section of the example 1 of expression DC motor of the present invention and petrolift.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the cutaway view of the III-III line of Fig. 1.
Fig. 4 is the cutaway view of the IV-IV line of Fig. 1.
Fig. 5 is the stereogram of the brush holder assembly of example 1.
Fig. 6 is the stereogram of portion of terminal of the brush holder assembly of expression example 2.
Fig. 7 is the stereogram of brush holder assembly of the example 2 of expression DC motor of the present invention and petrolift.
Fig. 8 is the stereogram of brush holder assembly of the example 3 of expression DC motor of the present invention and petrolift.
Fig. 9 is the stereogram of brush holder assembly of the example 4 of expression DC motor of the present invention and petrolift.
Figure 10 is the longitudinal sectional view of brush holder assembly of the example 5 of expression DC motor of the present invention and petrolift.
Figure 11 is the longitudinal sectional view of brush holder assembly of the example 6 of expression DC motor of the present invention and petrolift.
Figure 12 is the longitudinal sectional view of brush holder assembly of the example 7 of expression DC motor of the present invention and petrolift.
Embodiment
Below, describe with reference to the example of accompanying drawing the best of implementing the present invention and using.
[example 1]
Fig. 1 is the longitudinal section of example 1 that the petrolift of DC motor of the present invention has been used in expression, Fig. 2 is its vertical view, Fig. 3 is the cutaway view of the III-III line of Fig. 1, Fig. 4 is the cutaway view of the IV-IV line of Fig. 1, Fig. 5 is the stereogram of 2 brush carriages of expression example 1, and Fig. 6 is the stereogram of portion of terminal of 1 brush carriage of expression example 1.
This example 1 is a petrolift 100, and this petrolift 100 is attached to lift-launch on the engine on the automobile, and supplies with the liquid fuel of gasoline etc. to engine.
This petrolift 100 is that DC motor after utilizing the present invention to improve 20 and the pump 30 that utilizes it to drive are combined.Petrolift 100 has: the yoke 10 of tubular, be located at the upper end of this yoke 10 the 1st housing 11, be located at the 2nd housing 12, the rotating shaft 13 of the bottom of yoke 10.The 1st housing 11 constitutes goes up lateral bracket, is known as the brush carriage housing.The 2nd housing 12 constitutes lower bracket, is known as pump case.The 1st housing 11, the upper end of supporting rotating shaft 13 revolvably.In addition, the 2nd housing 12 is by metal bearing 14 bottom of supporting rotating shaft 13 revolvably.And the 2nd housing 12 has the metal bearing 15 of the bottom of supporting rotating shaft 13, and this metal bearing 15 is subjected to the thrust of rotating shaft 13.
The upper end of yoke 10 is by the 1st housing (brush carriage housing) 11 sealings, and in addition, its bottom is utilized these yoke the 10, the 1st housing the 11, the 2nd housings 12 by the 2nd housing (pump case) 12 sealings, forms confined space 16 in the inside of yoke 10.
The 1st housing (brush carriage housing) 11 for example, is made roughly discoideus with polyacetal resin.The 1st housing (brush carriage housing) 11 has inner face 11a and outside 11b, and this inner face 11a and outside 11b are relative to each other.On the outside 11b of the 1st housing (brush carriage housing) 11, form fuel discharge pipe 17 and fuel relief valve 18 highlightedly.As shown in Figure 2, fuel discharge pipe 17 be formed at the 1st housing (brush carriage housing) 11 central part, be on the axis of rotating shaft 13, be formed with fuel relief valve 18 near the position of periphery a little at this fuel discharge pipe 17.
It is roughly discoideus that the 2nd housing (pump case) 12 also utilizes resin to make.In the 2nd housing (pump case), dispose fuel suction pipe 19.By pump 30 is driven, the fuel of gasoline etc. can suck the fuel suction pipe 19 from fuel tank, by the inner space 16 of yoke 10, supplies with to engine from fuel discharge pipe 17.The pressure of the fuel in inner space 16 is if rise singularly, and fuel relief valve 18 is opened, and the pressure of the fuel of inner space 16 descends, and returns to fuel tank.
DC motor has: yoke 10, rotating shaft 13, excitation part 21, armature 22, commutator 23, brushgear 25, brush holder assembly 26.
Rotating shaft 13 is configured on the central shaft of yoke 10.Excitation part 21 for example is a plurality of magnet, and they are installed on the inner peripheral surface of yoke 10, on the interior week of excitation part 21 magnetic field takes place.Armature 22 is installed on the rotating shaft 13, and is relative with the inner peripheral surface of excitation part 21 by the gap.This armature 22 can be rotated in magnetic field, by direct current is powered to the armature coil of this armature 22, and is rotated in magnetic field with rotating shaft 13.
Brushgear 25 as shown in Figure 5, comprises a pair of brush 251,252, contacts on the same circumference of each brush 251,252 and contact-making surface 24, along with the rotation of rotating shaft 13, in contact-making surface 24 enterprising line slips.Utilize the rotation of commutator 23, each brush 251,252 contacts with a plurality of each commutator segment 23a successively, powers to connected armature coil.Brush 251,252 is accepted the power supply from positive side current supply line that is connected with the plus end of DC power supply and the minus side current supply line that is connected with its negative terminal respectively, and direct current is supplied with to armature coil.
In this example 1, for the brush of brush 251,252 user's columns, this brush 251,252 and contact-making surface 25a commutator 23 are that length on one side is the roughly square of 4.0mm.This brush 251,252 for example is with the graphite system brush of graphite as main component.
Brush holder assembly 26 is configured to corresponding with each a pair of brush 251,252 difference 1 each and every one ground also a plurality ofly.In example 1, use 2 brush carriages 261,262 corresponding with brush 251,252.This brush holder assembly 26 is the members as center of the present invention.Each a plurality of brush carriages 261,262 is made identical shape, size mutually, and makes with identical materials.Each brush carriage 261,262 especially as shown in Figure 5, has plate spring part 27 and portion of terminal 28 respectively, and these plate spring part 27 and portion of terminal 28 are by forming 1 sheet material bending mutually.Sheet material as constituting brush carriage 261,262 for example uses the zinc-plated copper coin of thickness of slab as 0.5mm.This sheet material bending ground is constituted brush carriage 261, and in addition, brush carriage 262 is also by being made of the other sheet material bending ground that identical materials constitutes.
Each plate spring part 27 of each brush carriage 261,262 as shown in Figure 5, has: 2 flat part 27a, 27b of mutual almost parallel; The connecting portion 27c of the inclination that the end of these flat parts 27a, 27b is connected.These flat parts 27a, 27b and connecting portion 27c are also mutually integratedly with same sheet material, for example form above-mentioned copper coin bending.
The flat part 27a of upside is configured to the state that combines with the inner face 11a of the 1st housing (brush carriage housing) 11.In addition, flat part 27b is configured to the state relative with the contact-making surface 24 of commutator 23.This flat part 27b mainly according to the elastic force of connecting portion 27c, carries out the application of force to the contact-making surface 24 of commutator 23.
On the central portion of the flat part 27b of downside, be formed with foursquare brush retaining hole 27d.On the 2 relative limits of this foursquare brush retaining hole 27d, a pair of brush retention tab 27e forms relative to each other, and in addition, on remaining relative 2 limit, a pair of brush retention tab 27f forms relative to each other.A pair of brush retention tab 27e carries out bending to the top of flat part 27b, and in addition, a pair of brush retention tab 27f carries out bending to its below.
Brush retaining hole 27d makes brush 251,252 that can just embed flat column and the size that keeps, and as shown in Figure 5, in this brush retaining hole 27d, closely embeds the brush 251,252 that flat column is arranged with being pressed into.The brush 251,252 of this flat column has relative 2 couple outside 25b, 25c.On the relative outside 25b of 1 couple of the brush 25 of this flat column, carry out butt with a pair of brush retention tab 27e, in addition, on remaining a pair of outside 25c, carry out butt with a pair of brush retention tab 27f, utilize these brush retention tabs 27e, 27f, more firmly brush 251,252 is kept.
The flat part 27b of each downside of brush carriage 261,262, the elastic force of the connecting portion 27c that utilization is tilted pushes the brush 251,252 that remains among the brush retaining hole 27d to the contact-making surface 24 of commutator 23.Brush 251,252 is owing to wearing and tearing with the slip of commutator 23.After these brush 251,252 wearing and tearing, brush 251,252, utilize the elastic force of connecting portion 27c,, all the time the contact-making surface 24 of brush 251,252 to commutator 23 pushed to the direction of rotating shaft 13 almost parallels and automatically move to the contact-making surface 24 of commutator 23.In other words, brush 251,252 compensates this wearing and tearing ground and follows mobilely along with wearing and tearing, and the contact-making surface 24 to commutator 23 pushes all the time.
Each portion of terminal 28 of brush carriage 261,262 from the vertical bending of an end of the flat part 27a of plate spring part 27, and is made integratedly with plate spring part 27.These each portion of terminal 28 have terminal board 28a and connecting portion 28b respectively.These terminal boards 28a and connecting portion 28b also make mutually certainly integratedly.
Connecting portion 28b is from the vertical bending of an end of the flat part 27a of the upside of plate spring part 27.Terminal board 28a is from only bending angle of this connecting portion 28b θ.At the other end of flat part 27a, be formed with the bending part 27g parallel with this connecting portion 28b, this bending part 27g is relative parallel to each other with connecting portion 28b.
As shown in Figure 3, on the inner face 11a relative, be formed with projection 11c, the 11d of 2 flat columns with the rectification 23 of the 1st housing (brush carriage housing) 11.These projections 11c, 11d, the axis of relative rotation axi 13 is formed on the position of mutual symmetry.Brush carriage 261 is maintained on the projection 11c, and brush carriage 262 is maintained on the projection 11d.Specifically, each brush carriage 261,262 is pressed into projection 11c, 11d respectively between relative each connecting portion 28b and bending part 27g, is securely held on the inner face 11a of the 1st housing (brush carriage housing) 11.In other words, each brush carriage 261,262 is retained, and each connecting portion 28b and bending part 27g, sandwiches from both sides with projection 11c, 11d.
On the 1st housing (brush carriage housing) 11,, form 2 elongated rectangular through hole 11e, 11f as Fig. 2, Fig. 3 and shown in Figure 4.These through holes 11e, 11f connect the 1st housing (brush carriage housing) 11 between the inner face 11a of the 1st housing (brush carriage housing) 11 and outside 11b.These through holes 11e, 11f, leave rotating shaft 13 axis and with the common plane of this parallel axes on alignment arrangements.Each terminal board 28a of each brush carriage 261,262 connects these through holes 11e, 11f, and outstanding to the outside of the 1st housing (brush carriage housing) 11.
Since will be roughly the U font external connecting 28c as shown in Figure 6, be bent into the open end 28e of its U font to the outside of brush carriage housing 11 11b opened state, so the width w of external connecting 28c can be identical with the width W of terminal board 28a, and can be identical with the width W of through hole 11e, 11f shown in Figure 4.In addition, the external connecting 28f of Fig. 7 is bent into the propagation direction opened state of the open end 28e of its U font to the outside of brush carriage housing 11 11b.In this occasion, prepare to compare, have the external connecting 28f of about 2 times of width with the width W of terminal board 28a, it need be bent into the U font, also need to make the width W of through hole 11e, 11f bigger, and compare with it, in external connecting 28c shown in Figure 6, can make its width w littler.
Because through hole 11e, 11f are positioned on the identical plane, so the external connecting 28c of 2 brush carriages 261,262 is positioned on the roughly the same plane.This plane, be leave rotating shaft 13 and with the plane of the parallel axes of this rotating shaft 13, as shown in Figure 2, be positioned at the very near outside of fuel discharge pipe 17.When the axis direction of left-hand tools axle 13 was seen, these external connecting 28c was positioned at all sides of the circumference that the contact-making surface 24 of brush 251,252 and commutator 23 slides.
The circumference that the contact-making surface 24 of brush 251,252 and commutator 23 slides for the contact area that makes brush 251,252 relative commutators 23 increases as far as possible, and is set at the position in the outer as far as possible week of commutator 23.External connecting 28c is positioned at the inboard of this circumference, and is configured in from the nearer position of the axis of rotating shaft 13.The configuration of this external connecting 28c, the occasion carry out branch from the part that positive side current supply line and minus side current supply line are tied up mutually can make the terminal of these current supply lines be connected with each portion of terminal 28 easily.Positive side current supply line and minus side current supply line are tied as common current supply line mutually, and be disconnected from each other and be connected with each external connecting 28c of brush carriage 261,262 from this flexible cord.
As can be seen from Figure 5, the angle θ 1 between the terminal board 28a of 2 brush carriages 261,262 is 180 degree.Relative therewith, the angle θ 2 between the brush 251,252 that is kept on each plate spring part 27 of 2 brush carriages 261,262 is made into 90 degree.These angles θ 1, θ 2 are the angles around the axle center of rotating shaft 13.The difference of these angles θ 1, θ 2 depends on the bending angle θ between terminal board 28a and the connecting portion 28b.
Pump portion 30 has: yoke the 10, the 2nd housing (pump case) 12, impeller 31.In the inside of the 2nd housing (pump case) 12, be formed with relative a pair of face 12a, the 12b of slipping.These slip face 12a, 12b, are formed on respectively on the plane with the orthogonal axe of rotating shaft 13, by at interval and relative to each other.Slip between face 12a, the 12b at these, impeller 31 with slip face 12a, 12b and be configured with slipping.Impeller 31 is fixed on the rotating shaft 13, when driving rotating shaft 13, with these rotating shaft 13 rotations.
On the peripheral part of impeller 31, pump chamber 33 forms ring-type, and this pump chamber 33 is being communicated with fuel suction pipe 19.Pump chamber 33 also is being communicated with confined space 16 in the yoke 10, fuel from 19 suctions of fuel suction pipe, supply with to this confined space 16, the armature 22 of the inside by DC motor 20 and the gap between the excitation part 21, supply with to the commutator 23 and the contact portion of brushgear 25, supply with to engine from fuel discharge pipe 17 again.
The contact portion of commutator 23 and brushgear 25 is submerged in the liquid fuel that fills with yoke 10 inside.Brushgear 25 slips with commutator 23 in this liquid fuel.
As mentioned above, in the DC motor 20 of example 1, brush carriage 261,262 has plate spring part 27 and portion of terminal 28, because these plate spring part 27 and portion of terminal 28 utilize sheet material to form, so can be omitted in employed pigtail in the past the DC motor.In addition, because plate spring part 27 keeps brush 251,252, and with the direction of rotating shaft 13 almost parallels on, the contact-making surface 24 of brush 251,252 to commutator 23 pushed, so can be omitted in employed special spiral helicine brush spring in the past the DC motor.In addition, plate spring part 27 because to the wearing and tearing of brush 251,252 brush 251,252 is followed to the contact-making surface 24 of commutator 23 mobile, keeps tin so can also be omitted in in the past the DC motor employed special brush.
Owing to omitted these pigtails, spiral helicine brush spring, special brush maintenance tube, so can make brush carriage 261,262 miniaturizations, in addition, each brush carriage 261,262 constitutes one with the sheet material bending, because its part number reduces, so can improve the size stabilization that because of the deviation of the size that causes in conjunction with error of part, also can realize brush carriage.With this, can make more miniaturization and improve its dimensional accuracy of DC motor.
In addition, because the minimizing of the part number of brush carriage 261,262, so brush carriage 261,262 can be become simpler structure.The brush carriage 261,262 of this simple structure also utilizes the circulation of fuel and reduces vibration, owing to can suppress the vibration of brush 251,252, so can make brush 251,252 slicker and more sly with contacting of commutator 23 and can more stably power to commutator 23.
Especially in the DC motor 20 of example 1, plate spring part 27 is owing to be that the sheet material bending is formed, so that make in the space of length that can spiral helicine brush spring in the past is shared is littler, axial dimension is reduced and realize more lightweight.
In addition, the DC motor 20 of example 1, since the contact-making surface 24 of commutator 23 be positioned at rotating shaft 13 roughly on the plane orthogonal, brush 251,252 is pushed to the direction with rotating shaft 13 almost parallels, so do not need picture with the concentric circumference of rotating shaft 13 on the contact-making surface of formation commutator, carry out operation that brush is pushed open to periphery in the occasion that armature 22 is packed into, can easily carry out packing into of armature 22.
In addition, in the DC motor 20 of example 1, because brush 251,252 is remained on the flat part 27b of plate spring part 27, so can utilize flat part 27b that these brushes 251,252 are kept simply, in addition, the axial dimension of flat part 27b is reduced, thereby the axial dimension of DC motor and petrolift is dwindled.
In addition, in example 1, portion of terminal 28, owing to be configured in the position of the more close rotating shaft of part that contacts with commutator 23 than brush 251,252 near each otherly, so in the part that is tied mutually from positive side current supply line and minus side current supply line, the occasion that is connected to branch, the terminal of these current supply lines is connected with each portion of terminal 28.
In addition, in the DC motor 20 of example 1, make portion of terminal 28 outstanding from brush carriage housing 11, because in the outside of this brush carriage housing, the external connecting 28c that is bent into the U font is set, even so portion of terminal 28a is made sheet material, also can increase the intensity of external connecting 28c, when carrying out the connection of current supply line, can improve its distortion, lose such unfavorable condition.
In addition, in the DC motor 20 of example 1, plate spring part 27 is made of with the connecting portion 27c that is connected them relative flat part 27a, 27b, because flat part 27a is remained on the brush carriage housing 11, so can utilize connecting portion 27c, flat part 27b is applied essential elastic force.
In addition, portion of terminal 28 is located on the end of flat part 27a, the bending part 27g relative with portion of terminal 28 is located on its other end, these portion of terminal 28 and bending part 27g, owing to make from both sides and sandwich the projection 11c on the inner face 11a that is located at brush carriage housing 11, the state of 11d, so, can keep simply by brush carriage 261,262 is pressed into towards projection 11c, 11d from a side.
In addition, in the DC motor 20 of example 1, because brush 251,252 is remained on the flat part 27b, so can utilize the elastic force of connecting portion 27c, simply the contact-making surface 24 of brush 251,252 to commutator 23 pushed.
In addition, in the DC motor 20 of example 1, since the portion of terminal 28 of at least 2 the 1st brush carriages 261 and the 2nd brush carriage 262 leave the axis of rotating shaft 13 and be configured to the same plane of this axis almost parallel on the state arranged, so the portion of terminal of each brush carriage 261,262 can be configured to simple row, in addition, owing to the portion of terminal 28 of the middle heart of avoiding brush carriage housing 11 to each brush carriage 261,262 is configured, so fuel discharge pipe 17 can be configured in the center of brush carriage housing 11.
In addition, the portion of terminal 28 of each brush carriage 261,262 is carried out one row be configured to after, 1st, the 2nd brush 251,252, around rotating shaft 13, owing to be configured to 180 degree angle intervals following, that be in particular 90 degree, so for brush 251,252, can suitably be configured in and be suitable for the angle position that powers to armature coil.
In addition, in the petrolift of example 1, owing to omitted employed pigtail in the DC motor in the past, spiral helicine brush spring, special brush maintenance tube, so can make brush carriage 261,262 miniaturizations, in addition, because its part number reduces, so can improve deviation, can realize the size stabilization of brush carriage because of the size that causes in conjunction with error of part.With this, can make more miniaturization and improve its dimensional accuracy of DC motor, and, more miniaturization and improve its dimensional accuracy of the petrolift that can use this DC motor.
In addition, in the petrolift of example 1, owing to fuel discharge pipe 17 is located at the central part of the 1st housing 11, so the fuel that can will flow in the inner space 16 of yoke 10 can not be focused to the fuel discharge pipe 17 that is arranged in central part with getting muddled, and, even yoke 10 is installed at any angle, also be positioned at the central part of the 1st housing 11 all the time, so do not need the 1st housing 11 to be replaced, can be improved versatility according to the kind of engine owing to be positioned at the fuel discharge pipe 17 of the central part of the 1st housing 11.
In addition, in example 1, brushgear 25 can also constitute the many states to brush that contain more than 2 pairs, for example, can also constitute and contain 2 pairs, the i.e. state of 4 brushes.Using the occasion of 2 pairs of brushes, will a pair of brush and a pair of brush carriage identical with a pair of brush 251,252 of Fig. 1～shown in Figure 5 and a pair of brush carriage 261,262, the axis that is configured in rotating shaft 13 is the position of the symmetry at center.In this occasion, fuel discharge pipe 17 is configured in the central part of brush carriage housing 11, and disposes the brush and the brush carriage of 2 pairs of totals in its both sides.
In addition, in example 1, the portion of terminal 28 of each brush carriage 261,262 is alignment arrangements at grade, the width W of the described in-plane of each portion of terminal 28 shown in Figure 3 is also made identical mutually, but also the width W of the described in-plane of each portion of terminal 28 of alignment arrangements can be made mutual difference.Its result can discern each portion of terminal 28 corresponding to connected positive side current supply line and minus side current supply line, so be effective for the connection of carrying out each current supply line easily.
[example 2]
Fig. 7 represents the part of the example 2 of DC motor of the present invention and petrolift.This Fig. 7 represents the DC motor 20 of the petrolift 100 of this example 2, especially represents the portion of terminal 281 of 1 brush carriage of its brush holder assembly 26.This portion of terminal 281, same with the portion of terminal 28 of example 1, have terminal board 28a and connecting portion 28b, connecting portion 28b carries out bending from the flat part 27a of the upside of plate spring part 27 as shown in Figure 5.
The portion of terminal 281 of this example 2, for example suitable with the portion of terminal 28a of the brush carriage 262 shown in the right side of Fig. 5, in the outside of brush carriage housing 11, have the external terminal portions 28f that is bent into the U font.The external terminal portions 28f of this U font is bent into the direction opened state of the open end 28d of its U font to the outside of brush carriage housing 11 11b expansion.
In this portion of terminal 281, in order to obtain required elastic force, when the thickness to the sheet material that constitutes brush carriage determines, on portion of terminal 281, this sheet material is bent into the U font and forms the external terminal portions 28f with adequate thickness from plate spring part 27.This external terminal portions 28f can make the external terminal portions 2fc of the thickness of thickness more than 2 times with sheet material, and current supply line is connected with the external terminal portions 28f of this adequate thickness.In addition, utilize the external terminal portions 28f that is bent into the U font, the mechanical strength of external terminal portions 28f is increased.
[example 3]
Fig. 8 represents the part of the example 3 of DC motor of the present invention and petrolift.This Fig. 8 represents the DC motor 20 of the petrolift 100 of this example 3, especially represents the portion of terminal 282 of 1 brush carriage of its brush holder assembly 26.The portion of terminal 282 of this example 3 in the outside of brush carriage housing 11, has the external terminal portions 28f that is bent into the U font.The external terminal portions 28f of this U font, the open end 28e and the external connecting 28f shown in Figure 7 that are bent into its U font are same, and the outside 11b of brush carriage housing 11 is towards the direction opened state that enlarges.
The portion of terminal 282 of this example 3 is being bent on the bending part 28g of U font, has the through hole 28h of rectangle, in this through hole 28h, embeds and is fixed with the terminal of current supply line, and carry out soldering as required.Utilize this through hole 28h, can simply and securely current supply line be fixed on the external connecting 28f.
[example 4]
Fig. 9 represents the part of the example 4 of DC motor of the present invention and petrolift.This Fig. 9 represents the DC motor 20 of the petrolift 100 of this example 4, especially represents the portion of terminal 283 of 1 brush carriage of its brush holder assembly 26.The portion of terminal 283 of this example 4 in the outside of brush carriage housing 11, has the external terminal portions 28f that is bent into the U font.
The portion of terminal 283 of this example 4 is being bent on the bending part 28g of U font, has the protuberance 28j of rectangle, in this protuberance 28j, embeds and is fixed with the terminal of current supply line, and carry out soldering as required.Utilize this protuberance 28j, also can simply and securely current supply line be fixed on the external connecting 28f.
[example 5]
Figure 10 represents the part of the example 5 of DC motor of the present invention and petrolift.This Figure 10 represents the DC motor 20 of the petrolift 100 of this example 5, especially represents 1 brush carriage 263 of its brush holder assembly 26.This brush carriage 263 is maintained on the 1st housing (brush carriage housing) 11, and brush 251 is kept.This brush carriage 263 has: the 1st support the 271, the 2nd support 272, be formed on the plate spring part 273 between them, and, also have the portion of terminal 28 that connects the 1st housing (brush carriage housing) 11 in the upper end of the 1st support 271.These supports 271,272; Plate spring part 273 and portion of terminal 28 all are with a sheet material, for example described copper coin are carried out bending and form mutually.
1st, the 2nd support 271,272 is relative to each other and to extending with the direction of rotating shaft 13 almost parallels of DC motor 20.The upper end of the 1st support 271 is embedded among the inner face 11a of the 1st housing (brush carriage housing) 11, and is fixed on the 1st housing (brush carriage housing) 11.The upper end of the 2nd support 272, by bending be fixed on the inner face 11a of brush carriage housing 11.
In this example 5, the plate spring part 273 of maintenance brush 251, because continuous 2 supports 271,272 in utilization and its two ends are fixed on the brush carriage housing 11, plate spring part 273 is just fixed more firmly and can be improved brush maintenance function.
[example 6]
Figure 11 represents the part of the example 6 of DC motor of the present invention and petrolift.This Figure 11 represents the DC motor 20 of the petrolift 100 of this example 6, especially represents 1 brush carriage 264 of its brush holder assembly 26.This brush carriage 264, same with brush carriage 263 shown in Figure 10, at the two ends of plate spring part 273, have the 1st, the 2nd support 271,272.Support 272, in this example 6, method such as utilize to insert moulding or be pressed into is embedded on the inner face 11a that is fixed in brush carriage housing 11.
In this example 6, each support 271,272 comprises that the sheet material that will be made of described copper coin is bent into the 27q of spring portion of waveform.The 27q of this spring portion produces the elastic force on the elastic force that is additional to rake 27p, by comprehensive, the bigger elastic force of rake 27p and the 27q of spring portion, and the contact-making surface 24 of brush 251 to commutator 23 can be pushed.
[example 7]
Figure 12 represents the part of the example 7 of DC motor of the present invention and petrolift.This Figure 12 represents the DC motor 20 of the petrolift 100 of this example 7, especially represents 2 brush carriages 265,266 of its brush holder assembly 26.These brush carriages 265,266 have plate spring part 27 and portion of terminal 28 respectively, will be made of a sheet material, the sheet material bending that for example is made of described copper coin respectively.
Brush 251,252 is the angle intervals configuration of spending with θ=90 mutually on the same circumference at center at the axis with rotating shaft 13.Each plate spring part 27 of brush carriage 265,266, in this example 7, also the axis with rotating shaft 13 is the center, mutually is configured to the state that radially extends to it with the angle intervals of 90 degree.Each portion of terminal 28 of brush carriage 265,266 is configured on the plane parallel to each other.This plane, be leave rotating shaft 13 and with the plane of its parallel axes.
The brush carriage 265,266 of this example 7 is compared with the brush carriage 261,262 of example 1, and bending simplifies the structure, and can easily constitute more at an easy rate.In addition, angle intervals between the plate spring part 27 of each brush carriage 265,266 is made 90 degree, and can easily change as required, and portion of terminal 28 can be configured in and the enough near position of the axis of rotating shaft 13 in the circumference of brush 251,252 contacts.
In addition, the rake 27t of example 7 is that its radial direction of middle mind-set extends with the axis of rotating shaft 13, can make simple shape and enough elastic force is applied on the brush 251,252.Brush 251,252 is even also can be pushed into the contact-making surface 24 of commutator 23 all the time because of its wearing and tearing.The contact position of this brush 251,252 changes on the radial direction of rotating shaft 13 a little, but the contact position of the circumferencial direction on this rotating shaft 13 can not change, so can power to commutator 23 reliably.
Utilizability on the industry
Dc motor of the present invention can be applied to the petrolift of engine feed fuels, in addition, combustion The material pump is attached to engine, for example can be used in automobile.
Claims (13)
1, a kind of DC motor is characterized in that, has:
Be installed on the rotating shaft and revolvable armature in magnetic field;
Be installed on this armature, roughly have the commutator of contact-making surface on the plane orthogonal with described rotating shaft;
The brush that contacts with the described contact-making surface of this commutator;
Have plate spring part and portion of terminal, the described brush of maintenance and to the brush carriage of its power supply; And
The brush carriage housing that keeps this brush carriage,
Utilize integrally formed described plate spring part of sheet material and portion of terminal,
Described plate spring part has the flat part that keeps described brush, the connecting portion or the rake of the inclination between this flat part and described portion of terminal,
Described flat part is relative with described contact-making surface,
The connecting portion of described inclination or rake put on described flat part in the direction with described rotating shaft almost parallel with the elastic force that described brush is pressed to described contact-making surface,
Described portion of terminal connects described brush carriage housing in the direction with described rotating shaft almost parallel, and powers to described brush by described plate spring part.
2, DC motor as claimed in claim 1 is characterized in that, described portion of terminal is configured in the position of the more close described rotating shaft of part that contacts with commutator than described brush.
3, DC motor as claimed in claim 1, it is characterized in that, described brush carriage housing, have inner face relative and the outside relative with this inner face with the contact-making surface of described commutator, described portion of terminal is outstanding from the outside of described brush carriage housing, has the external connecting that is bent into the U font in the outside of this brush carriage housing.
4, DC motor as claimed in claim 1 is characterized in that, described plate spring part is formed by connecting the 1st, the 2nd relative flat part with connecting portion, and described the 1st flat part is maintained on the described brush carriage housing.
5, DC motor as claimed in claim 4, it is characterized in that, on an end of described the 1st flat part, be provided with described portion of terminal, and on the other end, be provided with the bending part relative with described portion of terminal, these portion of terminal and bending part, make the state that will be located at the projection clamping on the inner face of described brush carriage housing from both sides, described the 1st flat part is remained on the described brush carriage housing.
6, DC motor as claimed in claim 4 is characterized in that, described brush is maintained on described the 2nd flat part, and this brush utilizes the elastic force of described connecting portion and is pushed to the contact-making surface of described commutator.
7, DC motor as claimed in claim 1, it is characterized in that, described plate spring part, have with the continuous part 1 of described portion of terminal and by the brush maintaining part and with the continuous part 2 of this part 1, described part 1 and part 2 all are maintained on the described brush carriage housing.
8, DC motor as claimed in claim 1 is characterized in that, described plate spring part to described rotating shaft roughly the direction of quadrature extend.
9, DC motor as claimed in claim 1 is characterized in that,
Described brush comprises the 1st, the 2nd brush, and described brush carriage comprises the 1st, the 2nd brush carriage,
Described the 1st, the 2nd brush carriage has described plate spring part and described portion of terminal respectively,
Described each plate spring part of described the 1st, the 2nd brush carriage is pressed to described contact-making surface respectively with described the 1st, the 2nd brush,
Described each portion of terminal of described the 1st, the 2nd brush carriage connects described brush carriage housing and powers to described the 1st, the 2nd brush respectively.
10, DC motor as claimed in claim 9, it is characterized in that, the described portion of terminal separately of described the 1st, the 2nd brush carriage, leave described rotating shaft axis and with the same plane of this axis almost parallel on arrange, and be maintained on the described brush carriage housing.
11, DC motor as claimed in claim 10, it is characterized in that, by the 1st brush of described the 1st brush carriage maintenance with by the 2nd brush of described the 2nd brush carriage maintenance, around the axis of described rotating shaft, dispose with the angle intervals littler mutually than 180 degree.
12, a kind of petrolift has: the yoke that forms the tubular in magnetic field in inside; Be configured in the rotating shaft on this yoke center line; The armature that be installed on this rotating shaft, can in described magnetic field, rotate; Be installed on the end of this armature and roughly have the commutator of contact-making surface on the plane orthogonal with described rotating shaft; The a plurality of brushes that contact with the described contact-making surface of this commutator; Support an end of described rotating shaft and cover the 1st housing of described a plurality of brushes; Be configured on the 1st housing a plurality ofly, respectively described a plurality of brushes are kept and to its power supply brush carriage; Be installed in the impeller on the other end of described rotating shaft; And the 2nd housing that covers this impeller and the other end of described rotating shaft is supported, utilize the rotation of described impeller, make the fuel circulation in the inner space of described yoke, the contact portion of described commutator and a plurality of brushes is immersed in this fuel, it is characterized in that
Described a plurality of brush carriage has respectively and utilizes integrally formed plate spring part of sheet material and portion of terminal,
The plate spring part of described each brush carriage has the flat part of the described brush that keeps corresponding, the connecting portion or the rake of the inclination between this flat part and described portion of terminal,
The described flat part of the plate spring part of described each brush carriage is relative with described contact-making surface,
The connecting portion of the plate spring part of described each brush carriage or rake are putting on corresponding described flat part with the direction of described rotating shaft almost parallel with the elastic force that corresponding described brush is pressed to described contact-making surface, and
The portion of terminal of described each brush carriage connects described the 1st housing in the direction with described rotating shaft almost parallel, and the described brush to correspondence is powered by corresponding described plate spring part.
13, petrolift as claimed in claim 12 is characterized in that, is equipped with fuel discharge pipe at the central part of described the 1st housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003287938 | 2003-08-06 | ||
| JP2003287938A JP4105059B2 (en) | 2003-08-06 | 2003-08-06 | Fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1581647A CN1581647A (en) | 2005-02-16 |
| CN1310405C true CN1310405C (en) | 2007-04-11 |
Family
ID=34366773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100082224A Expired - Fee Related CN1310405C (en) | 2003-08-06 | 2004-02-27 | DC. motor and fuel pump using said motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4105059B2 (en) |
| CN (1) | CN1310405C (en) |
| TW (1) | TWI229487B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0608828A2 (en) * | 2005-04-22 | 2017-07-25 | Mitsuba Corp | FUEL SUPPLY APPLIANCE |
| JP5649444B2 (en) * | 2008-03-24 | 2015-01-07 | 株式会社ミツバ | motor |
| US8513844B2 (en) | 2008-04-30 | 2013-08-20 | Nidec Copal Corporation | Motor |
| TWI416848B (en) * | 2008-05-19 | 2013-11-21 | Nidec Copal Corp | Motor |
| JP5852846B2 (en) * | 2010-12-28 | 2016-02-03 | アスモ株式会社 | motor |
| JP2013005705A (en) * | 2011-06-22 | 2013-01-07 | Kokusan Denki Co Ltd | Dc motor for pump |
| JP5787177B2 (en) * | 2012-06-05 | 2015-09-30 | 株式会社デンソー | Fuel pump |
| DE102017223388A1 (en) * | 2017-12-20 | 2019-06-27 | Robert Bosch Gmbh | Brush holder for an electric machine and electric machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638959A (en) * | 1979-08-31 | 1981-04-14 | Matsushita Electric Works Ltd | Brush for dc motor |
| JPH07111762A (en) * | 1993-10-12 | 1995-04-25 | Asmo Co Ltd | Brush holder of commutator motor |
| JPH11141571A (en) * | 1997-11-12 | 1999-05-25 | Ogura Clutch Co Ltd | Coil rotary electromagnetic clutch |
| JPH11150920A (en) * | 1997-11-12 | 1999-06-02 | Astec:Kk | Sliding brush |
| JP2001323856A (en) * | 2000-05-16 | 2001-11-22 | Mitsuba Corp | Structure for assembling power supply terminal in fuel pump |
| JP2002325400A (en) * | 2001-04-27 | 2002-11-08 | Matsushita Electric Ind Co Ltd | Small DC motor |
-
2003
- 2003-08-06 JP JP2003287938A patent/JP4105059B2/en not_active Expired - Fee Related
- 2003-10-28 TW TW92129877A patent/TWI229487B/en not_active IP Right Cessation
-
2004
- 2004-02-27 CN CNB2004100082224A patent/CN1310405C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638959A (en) * | 1979-08-31 | 1981-04-14 | Matsushita Electric Works Ltd | Brush for dc motor |
| JPH07111762A (en) * | 1993-10-12 | 1995-04-25 | Asmo Co Ltd | Brush holder of commutator motor |
| JPH11141571A (en) * | 1997-11-12 | 1999-05-25 | Ogura Clutch Co Ltd | Coil rotary electromagnetic clutch |
| JPH11150920A (en) * | 1997-11-12 | 1999-06-02 | Astec:Kk | Sliding brush |
| JP2001323856A (en) * | 2000-05-16 | 2001-11-22 | Mitsuba Corp | Structure for assembling power supply terminal in fuel pump |
| JP2002325400A (en) * | 2001-04-27 | 2002-11-08 | Matsushita Electric Ind Co Ltd | Small DC motor |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI229487B (en) | 2005-03-11 |
| JP2005057926A (en) | 2005-03-03 |
| TW200507409A (en) | 2005-02-16 |
| JP4105059B2 (en) | 2008-06-18 |
| CN1581647A (en) | 2005-02-16 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20070411 |