CN101826772B - Gear drive electromotor - Google Patents
Gear drive electromotor Download PDFInfo
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- CN101826772B CN101826772B CN201010134600.9A CN201010134600A CN101826772B CN 101826772 B CN101826772 B CN 101826772B CN 201010134600 A CN201010134600 A CN 201010134600A CN 101826772 B CN101826772 B CN 101826772B
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 218
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 238000003466 welding Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 16
- 230000008447 perception Effects 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000000994 depressogenic effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
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Abstract
A gear drive electromotor which can improve the detection precision of a rotating position of an output component by inhibiting the detection error of the rotating position of the output component caused by different rotation directions to be minor. The gear drive electromotor comprises an electromotor (10); the output component (14) accepting the driving force of the electromotor (10) transferred by a gear system (12); magnetic detection elements (16) for detecting the rotating position of the output component (14); and magnet bodies (18) paired with the magnetic detection elements (16), wherein, the output component (14) is provided with an input part (141) to which the driving force of the electromotor transferred to the gear system (12) is outputted; an output part (142) to which the driving force of the electromotor inputted to the input part (14) is outputted; and a protruding part (143) which protrudes closer to the radial external side than the input part (141) and the output part (142), wherein, any one of the magnetic detection elements (16) and the magnet bodies (18) is fixed in the vicinity of the radial external wall of the protruding part (143).
Description
Technical field
The present invention relates to a kind of gearmotor, more specifically, relate to and comprising for detection of by the gearmotor of the magnetic of the magnetic detecting element of the position of rotation of electric motor driven output link and this magnetic detecting element institute perception.
Background technology
As described in Patent Document 1, known have a gearmotor that the rotary power of motor is exported by a plurality of gears.The gearmotor that patent documentation 1 is recorded with the integrally formed driven gear of output shaft (output link) in be embedded with magnet and on position on the other side configuration be installed on the magnetic detecting element on substrate, thereby can detect the position of rotation of output shaft.
The driven gear of above-mentioned list of references 1 is in order to prevent the strength decreased as the tooth portion of the input part of transmission of power, makes magnet leave tooth portion and is arranged on the inner side of driven gear.Therefore in addition owing to making magnet leave tooth portion, thereby can not occur near tooth portion because the suffered stress of tooth portion is out of shape the situation that makes magnet positions skew.
Patent documentation 1: Japanese Patent Laid-Open 2004-229378 communique
Yet the gearmotor of patent documentation 1 is compared at the gearmotor in driven gear outside with configurations of magnets, exists according to the difference of above-mentioned rotation direction and makes to detect the first problem that error increases.In addition, as patent documentation 1 by driven gear and output shaft is integrally formed and be configured to transmission member in the situation that, export by output shaft from the power from motor side of tooth portion input.Therefore, in the situation that magnet is arranged on to half-way from tooth portion to output shaft as patent documentation 1, is arranged on the half-way of power transfer path, there is following Second Problem,, when not shown driven member is subject to large stress, between the tooth portion of driven gear and output shaft, also can be subject to large stress, make to be provided with the output shaft of magnet and the distortion of the half-way of tooth portion, thereby make that magnet positions changes, accuracy of detection reduces.
At this, for first problem, adopt Figure 10 being elaborated below.In addition, Figure 10 is for the problem of the gearmotor of patent documentation 1 is described, and makes output shaft (output link) the different key diagram in the magnet detection position of magnetic detecting element when being rotated counterclockwise that turns clockwise for explanation.
For example, when the magnetic field being produced by magnet 72 is magnetic field MF as shown in figure 10 (this shape is only illustration), the position that magnet 72 can be detected by magnetic detecting element 70 is the overlapping position of the outermost magnetic line of force of the magnetic field MF shown in test point P and Figure 10.At this, if not shown output shaft is turned clockwise centered by the some C of Figure 10, magnet 72 turns clockwise.Now, at the outermost magnetic line of force of test point P and magnetic field MF, in the left side of Figure 10 (central shaft A takes back), locate to detect on overlapping position magnet 72.On the contrary, if not shown output shaft is rotated counterclockwise, magnet 72 is rotated counterclockwise.Now, at the outermost magnetic line of force of test point P and magnetic field MF, in the right side of Figure 10 (central shaft A takes over), locate to detect on overlapping position magnet 72.That is to say, the detection position of the magnet 72 detecting by magnetic detecting element 70 can be according to the difference of the direction of rotation of output shaft (magnet 72) and on left side or the right side of central shaft A.Consequently, make turn clockwise when the being rotated counterclockwise detection position of the magnet of magnetic detecting element of output shaft exist very large different.
Situation by magnet 72 being arranged on relatively in the inner part to (Figure 10 (a)) compares knownly with being arranged on the relative situation of (Figure 10 (b)) in the outer part, and the detection error when side-play amount of the detection position of the magnet in the direction of rotation of the above-mentioned output shaft (magnet 72) when magnet 72 is arranged on inner side (be only called below and detect error) is arranged on outside than magnet 72 is large.; due in Figure 10 (a); the crossing angle of the straight line of the straight line of point of contact C and test point P and point of contact C and detection bodies 72 is larger; and in Figure 10 (b); the crossing angle of the straight line of the straight line of point of contact C and test point P and point of contact C and detection bodies 72 is less, so the detection error ratio magnet 72 that produces because of the difference of the direction of rotation of output shaft (magnet 72) while being arranged on inner side of magnet 72 is large while being arranged on outside.
Summary of the invention
In view of the above problems, it is a kind of as transmitting in the output link of transmission member of the actuating force output coming that technical problem to be solved by this invention is to provide, by the detection error of the position of rotation of the output link causing because of direction of rotation difference being suppressed to the gearmotor of the accuracy of detection of the less position of rotation that improves output link.
For solving the problems of the technologies described above, gearmotor of the present invention comprises: motor; Acceptance is transmitted the actuating force of the above-mentioned motor coming and will be transmitted the output link of the actuating force output of the above-mentioned motor coming by gear train; Magnetic detecting element for detection of the position of rotation of this output link; And the magnetic paired with this magnetic detecting element, it is characterized in that, in above-mentioned output link, by integrally formed, be provided with: input part, the actuating force that is passed to the above-mentioned motor of said gear system is inputted above-mentioned input part; Efferent, the actuating force that is imported into the above-mentioned motor of above-mentioned input part outputs to above-mentioned efferent; And extension, this extension is more outstanding towards radial outside than above-mentioned input part and above-mentioned efferent, is fixed with any one in above-mentioned magnetic detecting element and above-mentioned magnetic near the outer wall radially of above-mentioned extension.
According to gearmotor of the present invention, on output link, be formed with input motor actuating force input part and for the actuating force of motor being delivered to the efferent of driven member, and be provided with than above-mentioned input part and efferent more towards the outstanding extension of radial outside by integrally formed.Therefore, any one in the magnetic detecting element of the position of rotation for detection of output link and magnetic can be fixed near the outer wall radially of above-mentioned side-prominent extension outwardly, the detection error of the position of rotation of the output link that the direction of rotation difference because of output link can be caused is by this suppressed to less.In addition, because even magnetic is arranged on the extension of the outer fix of deflection is also less when being positioned at output link and being subject to large power input part and efferent, rather than the half-way of input part and efferent, therefore can the change in location of magnetic be suppressed to less.Therefore, with as prior art in the outer circumferential side setting of output link the situation of the power transfering part as the tooth portion of gear compare, can improve the accuracy of detection of the position of rotation of output link.And, owing to being provided with in one piece input part, efferent and extension on output link, therefore can reduce component count.
In addition, in the present invention, comparatively it is desirable to, above-mentioned input part and above-mentioned efferent are upwards arranged at overlapped position in the footpath of above-mentioned output link.If form as mentioned above, can make output link dwindle diametrically input part and efferent overlapping amount diametrically.Especially, if be configured on the axis of above-mentioned input part (in rotating shaft), above-mentioned efferent is set, can makes input part and efferent radially approach configuration, can make output link dwindle diametrically.
And, in the present invention, comparatively it is desirable to, above-mentioned extension is located at and above-mentioned input part or the overlapping position of above-mentioned efferent on the axis direction of above-mentioned output link.If form as mentioned above, due to by any one the extension being fixed with in magnetic detecting element and magnetic is arranged to above-mentioned input part or above-mentioned efferent overlapping on the axis direction of output link, size on the axis direction of output link is dwindled, the size that therefore can further reduce gearmotor.Especially, if above-mentioned magnetic detecting element or above-mentioned magnetic are located at and above-mentioned input part or the overlapping position of above-mentioned efferent on the axis direction of above-mentioned output link, can further dwindle the size on the axis direction of output link.
And, in the present invention, comparatively it is desirable to, on the axis direction of above-mentioned output link, have towards the hole portion of a side opening with towards the hole portion of opposite side opening, towards the hole portion of an above-mentioned side opening, be formed with above-mentioned input part and be formed with above-mentioned efferent towards the hole portion of above-mentioned opposite side opening, in the hole portion towards an above-mentioned side opening or towards the radial outside of the hole portion of above-mentioned opposite side opening, be formed with extension, above-mentioned magnetic detecting element or above-mentioned magnetic are located at the overlapping position with the hole portion of an above-mentioned side or the hole portion of above-mentioned opposite side on the axis direction of above-mentioned output link.According to said structure, due to by being formed with the hole portion of input part and efferent at the fixing radially inner side of the extension of magnetic detecting element or magnetic, can by magnetic detecting element or magnetic output link axially on be arranged to input part or efferent overlappingly, therefore can dwindle the size on the axis direction of output link.
In addition, in the present invention, comparatively it is desirable to, towards the hole portion of an above-mentioned side opening with towards the hole portion of above-mentioned opposite side opening, be connected to each other and along axis direction, run through the through hole of above-mentioned output link.If form as mentioned above, input part and efferent can be approached to configuration along axis direction.; by do not form the wall portion of heavy wall between input part and efferent; the outlet side member that can make the input side member that engages with hole portion as input part and engage with hole portion as efferent approaches configuration along axis direction, and can make the amount of the dimension reduction wall portion of gearmotor.
In addition, when above-mentioned magnetic detecting element and above-mentioned magnetic relatively configure on above-mentioned axis direction, be preferably, at above-mentioned extension, be formed with recess, this recess has the bearing surface vertical with above-mentioned axis of above-mentioned magnetic detecting element and any one institute's butt in above-mentioned magnetic.
When being magnetic detecting element with magnetic on axis direction during relative structure, magnetic detecting element depends on both intervals on axis direction to the detection sensitivity of magnetic, but according to said structure, due to magnetic detecting element with any one in magnetic with relative with another by the state of the bearing surface of recess location, therefore the deviation at the two interval of each product can be suppressed, thereby the little gearmotor of accuracy of detection deviation between product can be made.
In addition, at this moment above-mentioned extension is formed by resin, and the peristome of above-mentioned recess seals by thermofussion welding.
As mentioned above, if adopt thermofussion welding to seal the opening of recess, any one in magnetic detecting element and magnetic can be fixed on to extension simply.
In addition, be preferably, above-mentioned extension is formed with a pair of tongue piece, and any one above-mentioned magnetic detecting element and above-mentioned magnetic given prominence to and clamped to this pair of tongue piece toward the outer side from the outside wall surface of above-mentioned extension.
By above-mentioned tongue piece is set, any one in magnetic detecting element and magnetic can be arranged on more to the radial outside by output link.The detection outside of the position of rotation of the output link that therefore, the direction of rotation difference because of output link can be caused is suppressed to less.In addition, by magnetic being fixed into the radially most external of magnetic, be equivalent to the part that the front end of a pair of tongue piece is separated from each other, without form the wall portion of heavy wall in the radially outermost periphery of magnetic.According to said structure, the structure that is embedded in extension with magnetic is compared, and can dwindle the radial dimension of extension.
According to gearmotor of the present invention, on output link, be formed with input motor actuating force input part and for the actuating force of motor being delivered to the efferent of driven member, and be provided with than above-mentioned input part and efferent more towards the outstanding extension of radial outside by integrally formed.Therefore, any one in the magnetic detecting element of the position of rotation for detection of output link and magnetic can be fixed near the outer wall radially of above-mentioned side-prominent extension outwardly, the detection error of the position of rotation of the output link that the direction of rotation difference because of output link can be caused is by this suppressed to less.In addition, because even magnetic is arranged on the extension of the outer fix of deflection is also less when being positioned at output link and being subject to large power input part and efferent, rather than the half-way of input part and efferent, therefore can the change in location of magnetic be suppressed to less.Therefore, with as prior art in the outer circumferential side setting of output link the situation of the power transfering part as the tooth portion of gear compare, can improve the accuracy of detection of the position of rotation of output link.And, owing to being provided with in one piece input part, efferent and extension on output link, therefore can reduce component count.
Accompanying drawing explanation
Fig. 1 is the outside drawing (taking off the state after upper shell) of the gearmotor of present embodiment.
Fig. 2 is the outside drawing (taking off the state after upper shell and lower house) of observing from the side the gearmotor shown in Fig. 1.
Fig. 3 is the exploded perspective view of the gearmotor shown in Fig. 1 and Fig. 2.
Fig. 4 (a) observes the outside drawing of output link from efferent side, Fig. 4 (b) observes the outside drawing of output link from input part side.
Fig. 5 means the vertical view of the state after the gearmotor shown in Fig. 1～Fig. 3 takes off upper casing and output link.
Fig. 6 is the variation of the included output link of the gearmotor shown in Fig. 1～Fig. 3, and Fig. 6 (a) is illustrated in the state that magnetic is installed on output link, and Fig. 6 (b) is illustrated in the state that magnetic is not installed on output link.
Fig. 7 is the schematic diagram (embodiment 1) of the stop position of the output link on substrate while selecting a magnetic fixing hole to fix magnetic from be formed at four magnetic fixing holes of extension of output link.
Fig. 8 is the schematic diagram (embodiment 2) of the stop position of the output link on substrate while selecting two magnetic fixing holes on diameter to fix magnetic from be formed at four magnetic fixing holes of extension of output link.
Fig. 9 is the schematic diagram (embodiment 3) of the stop position of the output link on substrate when being chosen in two magnetic fixing holes adjacent on circumference fixing magnetic that the N utmost point is relative with magnetic detecting element and the S utmost point magnetic relative with magnetic detecting element from be formed at four magnetic fixing holes of extension of output link.
Figure 10 is for the problem of the gearmotor of patent documentation 1 is described, and makes output shaft (output link) the different key diagram in the magnet detection position of magnetic detecting element when being rotated counterclockwise that turns clockwise for explanation.
(symbol description)
1 gearmotor
10 motor
12 gear trains
14 output links
141 input parts
142 efferents
143 extensions
144 magnetic fixing holes (recess)
144b bottom surface (bearing surface)
16 magnetic detecting elements
18 magnetics
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are elaborated.Fig. 1 is the outside drawing (taking off the state after upper shell 91) of the gearmotor 1 of present embodiment, and Fig. 2 is the outside drawing (taking off the state after upper shell 91 and lower house 92) of observing from the side gearmotor 1.Fig. 3 is the exploded perspective view of gearmotor 1.
The gearmotor 1 of present embodiment comprises: as the motor 10 of drive source; After being slowed down with the speed reducing ratio of regulation, the rotation of motor 10 is delivered to the gear train 12 of output link 14; To transmit the rotation of the motor 10 coming towards the output link 14 of driven member output by gear train 12; Magnetic detecting element 16 for detection of the position of rotation of output link 14; And paired with this magnetic detecting element 16, and be fixed on the magnetic (magnet) 18 of output link 14.
Motor 10 is known DC motor, has the axle 101 of transferring power.Front end at axle 101 is fixed with the first gear 121 by being pressed into.Gear train 12 comprises: the first gear 121, and this first gear 121 is pressed in axle 101; The second gear (compound gear) 122, this second gear (compound gear) 122 and the first gear 121 engagements; The 3rd gear (compound gear) 123, the three gears (compound gear) 123 and the second gear 122 engagements; The 4th gear (compound gear) 124, the four gears (compound gear) 124 and the 3rd gear (compound gear) 123 engagements; A plurality of planetary gears 126, the plurality of planetary gear 126 is supported in planetary wheel carrier 125; And fixed gear 127, this fixed gear 127 is fixed on lower house 92.The second gear 122, the 3rd gear 123 and the 4th gear 124 can be rotated to support on respectively on the axle of being located at lower house 92.
Said gear system 12 is specifically described to the large diameter gear 122a engagement of the first gear 121 and the second gear 122.The large diameter gear 123a engagement of the small-diameter gear 122b of the second gear 122 and the 3rd gear 123.The large diameter gear 124a engagement of the small-diameter gear 123b of the 3rd gear 123 and the 4th gear 124.In addition, on the 4th gear 124, be formed with coaxially sun gear 124b with large diameter gear 124a, this sun gear 124b and planetary gear 126 engagements.Fixed gear 127 is formed with internal gear 127a at inner peripheral surface, this internal gear 127a and planetary gear 126 engagements.In addition, fixed gear 127 has: motor support 127b, the side of this motor support 127b supporting motor 10; Projection (not shown), this projection is for fixing base 20; And the 127c of substrate supporting portion, this 127c of substrate supporting portion supporting substrates 20 is to suppress substrate 20 deflections.In addition, sun gear 124b, planetary wheel carrier 125, planetary gear 126 and internal gear 127a have formed planetary gears.
The power of motor 10 is passed to rotation transmission member 13 by gear train 12.Rotation transmission member 13 has: main part 131; From main part 131 axle 132 outstanding towards below; And with this axle 132 the outstanding splined shaft 133 towards top on the contrary.Axle 132 is inserted to lead to and is being formed at the through hole 124c of the 4th gear 124 and is being formed in the through hole 125a of planetary wheel carrier 125.In addition, at the inner peripheral surface of main part 131, be formed with not shown internal tooth, this internal tooth by with planetary gear 126 engagements, make the transmission of power of motor 10 to rotation transmission member 13.
The rotation transmission member 13 forming as mentioned above utilizes splined shaft 133 by output link 14 engagings.Fig. 4 is the enlarged drawing representing after output link 14 is amplified.At this, Fig. 4 (a) observes the outside drawing of output link 14 from efferent 142 sides, and Fig. 4 (b) observes the outside drawing of output link 14 from input part 141 sides.In addition, Fig. 4 (a) represents that output link 14 is not yet fixed with the state of magnetic 18.
Output link 14 comprises: input part (splined hole) 141, and the chimeric splined shaft 133 that has rotation transmission member 13 of this input part (splined hole) 141, and the actuating force of motor 10 is inputted above-mentioned input part (splined hole) 141; Efferent (linking with hole) 142, this efferent (linking with hole) 142 links not shown driven member, and the actuating force of motor 10 is exported to outside; And flange shape extension 143, this extension 143 is more outstanding towards radial outside than input part 141 and efferent 142.Output link 14 is configured to and makes to transmit the actuating force of the motor 10 coming to the transmission member of not shown driven member transmission from rotating member 13.
At this, the input part 141 of present embodiment and efferent 142 are respectively formed at towards the hole portion of a side opening of the axis direction of output link 14 with towards the hole portion of the opposite side opening of the axis direction of output link 14.Therefore, because input part 141 and efferent 142 are arranged at the position upwards overlapping each other in the footpath of output link 14, thereby can make output link 14 dwindle diametrically input part 141 and efferent 142 overlapping amount diametrically.And present embodiment (in rotating shaft) on the axis of input part 141 is provided with efferent 142.Therefore, can make input part 141 and efferent 142 approach diametrically configuration, thereby can make output link 14 further dwindle diametrically.
Above-mentioned extension 143 is approximate on circumference is equally spaced formed with four magnetic fixing holes cylindraceous (being equivalent to the recess in the present invention) 144, is fixed with the magnetic 18 of cylindrical shape in any one in above-mentioned magnetic fixing hole 144.The multipotency of magnetic 18 is fixed four, its illustrate after narrate.Magnetic fixing hole 144 is along the axis direction of output link 14, to extend and be formed with the recess of the bottom surface 144b (being equivalent to the bearing surface in the present invention) that the peristome 144a of the side opening on axis direction is vertical with axis with output link 14.In addition, peristome 144a on the axis direction of output link 14 towards efferent 142 side openings.
The magnetic 18 of present embodiment is formed and forms cylindric that magnetic fixing hole 144 cylindraceous is rotatably assorted, and the N utmost point and S utmost point the two poles of the earth are in the axial direction magnetized out.In addition, magnetic 18 is inserted magnetic fixing hole 144 from peristome 144a, and any utmost point in extremely and the state of bottom surface 144b butt are fixed with the N utmost point and S.
In addition, extension 143 forms with size (width) more than the twice of the diameter of magnetic 18 diametrically, and magnetic fixing hole 144 is configured in than input part (splined hole) 141 and efferent (linking with hole) 142 more by radial outside.Therefore, because magnetic fixing hole 144 is not arranged on the half-way of power transfer path, even thereby when not shown driven member is subject to very large stress, magnetic fixing hole 144 can not be subject to very large stress yet.Therefore, can the change in location of magnetic 18 be suppressed to less.In addition, the internal diameter of cylindrical portion 142b of efferent (linking with hole 142) and the internal diameter of the large-diameter portion 141a of input part (splined hole) 141 form roughly the same diameter.
And in the present embodiment, near the fixed magnetic body 18 outer wall 143a of extension 143, makes to be located at extension 143 in magnetic 18 integral body as shown in Figure 4.Particularly, the radially outermost outer wall 18c of magnetic 18 and the outer wall 143a of extension 143 approach configuration.On the other hand, the radially inner most outer wall 18d of magnetic 18 be configured in than the inwall from cylindrical portion 142b to the radical length of the outer wall 143a of extension 143 1/2 more by the outer wall 143a side of extension 143.Therefore, magnetic 18 is configured in than the inwall of the cylindrical portion 142b from efferent (linking with hole) 142 in the region of 1/2 more outer wall 143a side of the radical length of the outer wall 143a of extension 143.
As the fixing means of magnetic 18, owing to coming the method for sealed open portion reliably and easily magnetic 18 to be sealed in to magnetic fixing hole 144 by thermofussion welding, thereby comparatively desirable.Also can adopt at the rear inflow molten resin of insertion magnetic 18 and carry out the methods such as the 144a of sealed open portion.
In addition, in the present embodiment, the slot part 142a that efferent 142 utilizes the part at cylindrical portion 142b as shown in Figure 4 to form towards radial outside arrives driven member by transmission of power, but this structure is only illustration.For example, can be also by serration, D shape cutting (D cutting) etc., to carry out the structure of transferring power and so on.In addition, input part 141 can be also serration hole.
In the present embodiment, extension 143 is formed at the position overlapping with input part (splined hole) 141 and efferent (linking with hole) 142 on the axis direction of output link 14.Especially, in the present embodiment, connected to each other and become the through hole that output link 14 is run through on axis direction with hole as the splined hole of input part 141 and link as efferent 142, at the radial outside of the coupling position of input part (splined hole) 141 and efferent (link with hole) 142, be provided with magnetic 18.Therefore, magnetic 18 is arranged on axis direction and input part (splined hole) 141 and efferent (linking with hole) 142 both overlapping positions.As mentioned above, owing to magnetic 18 being arranged in to the axially upper overlapping with input part (splined hole) 141 and efferent (linking with hole) 142 of output link 14, so the size on axis direction that can dwindle output link 14.
In addition, in the present embodiment, the magnetic detecting element 16 that perception is fixed on the magnetic 18 on output link 14 is arranged on the substrate 20 being installed between rotation transmission member 13 and output link 14.Fig. 5 means the vertical view of the state from gearmotor 1 takes off upper shell 91 and output link 14.As shown in Figure 5, the central authorities of substrate 20 are formed with for the splined shaft 133 of rotation transmission member 13 and insert logical through hole 201, and the end of substrate 20 is formed with the portion of terminal 202 being connected for the control unit with not shown etc.
In the present embodiment, two magnetic detecting elements 16 are arranged on substrate 20 and with portion of terminal 202 and are electrically connected to, so that these two magnetic detecting elements 16 are relative on axis direction with the extension 143 of output link 14.
The member of formation of this gearmotor 1 is accommodated in the housing consisting of upper shell 91 and lower house 92.Lower house 92 is formed with the axle of the projection of supporting motor 10 and rotatably mounted the second gear 122, the 3rd gear 123, the 4th gear 124.Upper shell 91 is formed with inserting hole 91b, and this inserting hole 91b inserts logical for the cylindrical portion that is formed with efferent 142 of output link 14.In addition, by the engaging sheet 91a that is formed at upper shell 91 is housed in above-mentioned each member of formation in housing with the engaging hole 92a engaging that is formed at lower house 92.
Gearmotor 1 action as described below forming as mentioned above.If to motor 10 power supplies, axle 101 rotations of motor 10.The rotation of axle 101 is passed to the 4th gear 124 slowing down by the second gear 122 and the 3rd gear 123 from the first gear 121 with axle 101 one rotations.The rotation of the 4th gear is passed to rotation transmission member 13 after slowing down by the planetary gears consisting of sun gear 124b, planetary wheel carrier 125, planetary gear 126 and internal gear 127a.13 1 rotations of rotation transmission member, rotation is just passed to the chimeric input part 141 that has above-mentioned splined shaft 133, makes output link 14 rotations.In addition, the rotation of output link 14 is passed to by above-mentioned efferent 142 driven member engaging with it.As mentioned above, the rotation of motor 10 is passed to driven member after slowing down with the speed reducing ratio of regulation by gear train 12.
In the action of said gear drive motor 1, utilize magnetic detecting element 16 to come perception to be fixed on the magnetic 18 of output link 14.The signal that the not shown control unit being electrically connected to gearmotor 1 produces based on magnetic detecting element 16 perception magnetics 18 is identified the position of rotation of output link 14.
Below, the detection form of the position of rotation of concrete output link 14 is described.Fig. 7 is the figure of the stop position of the output link 14 on substrate 20 while schematically representing to select a magnetic fixing hole to fix magnetic 18 from four magnetic fixing holes.Fig. 8 is the figure of the stop position of the output link 14 on substrate 20 while schematically representing to select two magnetic fixing holes on diameter to fix magnetic 18 from four magnetic fixing holes.Fig. 9 is the figure of the stop position of the output link 14 on substrate 20 when schematically representing to be chosen in two magnetic fixing holes adjacent on circumference fixing magnetic 18a that the N utmost point is relative with magnetic detecting element 16a ', 16b ' and the S utmost point magnetic 18b relative with magnetic detecting element 16a ', 16b ' from four magnetic fixing holes.In addition, in Fig. 7～Fig. 9, the angle of the first position of output link 14 is made as to 0 degree (benchmark angle).
First the first embodiment shown in Fig. 7 is described, as shown in the figure, substrate 20 is provided with magnetic detecting element 16a, 16b respectively on 0 degree position and 180 degree positions, and the extension 143 of output link 14 is provided with a magnetic 18.In addition, when output link 14 is positioned at the position shown in Fig. 7 (a), magnetic detecting element 16a sends signal, the anglec of rotation that detects output link 14 is 0 degree, when output link 14 is positioned at the position shown in Fig. 7 (c), magnetic detecting element 16b sends signal, and the anglec of rotation that detects output link 14 is 180 degree, can detect the position of rotation of output link 14 every 180 degree.
Then the second embodiment shown in Fig. 8 is described, as shown in the figure, substrate 20 is provided with magnetic detecting element 16a, 16b respectively on 0 degree position and 90 degree positions, and the extension 143 of output link 14 is provided with two magnetics 18 on diameter.In addition, when output link 14 is positioned at the position shown in Fig. 8 (a) and Fig. 8 (c), according to magnetic detecting element 16a, have the signal of perception magnetic and magnetic detecting element 16b no signal, the anglec of rotation that detects output link 14 is 0 degree or 180 degree.And when output link 14 is positioned at the position shown in Fig. 8 (b) and Fig. 8 (d), according to magnetic detecting element 16a no signal and magnetic detecting element 16b has the signal of perception magnetic, the anglec of rotation that detects output link 14 is 90 degree or 270 degree.Therefore, if carry out the differentiations of 0 degree and 180 degree and the differentiations of 90 degree and 270 degree in control side, just can detect the position of rotation of output link 14 every 90 degree.Differentiation need be considered for example after the initial installation site of magnetic and the direction of rotation of output link 14, to carry out.
Finally the 3rd embodiment shown in Fig. 9 is described, as shown in the figure, substrate 20 is provided with magnetic detecting element 16a ', the 16b ' that can differentiate magnet polarity respectively on 0 degree position and 180 degree positions, the extension 143 of output link 14 magnetic 18 relative with magnetic detecting element 16a ', 16b ' with the N utmost point is installed and in installation site from magnetic 18a towards the locational S utmost point magnetic 18b relative with magnetic detecting element 16a ', 16b ' of 90 degree that rotate in a circumferential direction, every 90 degree, just can detect the position of rotation of output link 14.
Particularly, when output link 14 is positioned at the position shown in Fig. 9 (a), according to magnetic detecting element 16a ', have the signal of perception N utmost point magnetic and magnetic detecting element 16b ' no signal, the anglec of rotation that detects output link 14 is 0 degree.When output link 14 is positioned at the position shown in Fig. 9 (b), according to magnetic detecting element 16a ' no signal and magnetic detecting element 16b ' has the signal of perception S utmost point magnetic, the anglec of rotation that detects output link 14 is 90 degree.When output link 14 is positioned at the position shown in Fig. 9 (c), according to magnetic detecting element 16a ' no signal and magnetic detecting element 16b ' has the signal of perception N utmost point magnetic, the anglec of rotation that detects output link 14 is 180 degree.In addition, when output link 14 is positioned at the position shown in Fig. 9 (d), according to magnetic detecting element 16a ', have the signal of perception S utmost point magnetic and magnetic detecting element 16b ' no signal, the anglec of rotation that detects output link 14 is 270 degree.
In addition, the installation number of magnetic 18 and installation site, except the embodiment 1～3 of Fig. 7～Fig. 9, are freely selected in four magnetic fixing holes that can also roughly equally spaced form from the circumference at extension 143.Position of rotation based on above-mentioned output link 14, utilizes the rotation of control unit control motor 10 so that driven member is positioned at assigned position.
The gearmotor 1 of this embodiment can be applicable to for example to make to open and close the situation that the valve of stream drives.When the embodiment 1 shown in Fig. 7, it is closed condition that the valve setpoint linking with output link 14 becomes when 0 spends, and is open mode when 180 spend, and can freely control by this switching of stream by controlling the rotation of motor 10.Now, the position of two magnetic detecting element 16a, 16b is at the two ends of the driving scope of output link 14.In addition, when the embodiment 3 shown in the embodiment 2 shown in Fig. 8 and Fig. 9, drive and every 90 degree, just can detect as mentioned above the valve of output link 14 links of position of rotation, if position of rotation 0 degree, 90 degree, 180 degree, 270 degree that the aperture of valve corresponds respectively to output link 14 for closed condition, little, in, large (full-gear), by controlling the rotation of motor 10, can flow through the adjustment of the flow of valve.
In the gearmotor 1 of controlling as mentioned above, as adopted Fig. 4 explanation, magnetic 18 is fixed in than input part 141 and efferent 142 more towards the extension 143 of the outstanding output link 14 of radial outside.By this, for detect output link 14 position of rotation and by the magnetic 18 of magnetic detecting element 16 perception with in the past (patent documentation 1) compare, be arranged at the radial outside of output link 14.Therefore, the detection error of the output link causing because of direction of rotation difference 14 position of rotation can be suppressed to less, thereby can improve the accuracy of detection of the position of rotation that utilizes the output link 14 that magnetic 18 detects.In addition, because magnetic 18 is arranged at the half-way of extension 143 rather than input part 141 and efferent 142, the input part 141 that deflection is also less while being subject to larger power even if above-mentioned extension 143 is positioned at output link 14 and the position in efferent 142 outsides, the change in location of the magnetic 18 that therefore distortion because of output link 14 can be caused is suppressed to less, thereby improves the accuracy of detection of the position of rotation of output link 14.
And in the present embodiment, magnetic 18 is fixed on the extension 143 of output link 14 with the state of the bottom surface 144b butt with magnetic fixing hole 144.That is to say, magnetic 18 is relative with magnetic detecting element 16 with the state of locating on above-mentioned axis direction by the vertical bottom surface 144b of the axis with output link 14.Therefore, can suppress the deviation at the interval of magnetic detecting element 16 and magnetic 18, thereby can make the little gearmotor 1 of accuracy of detection deviation between product.
In order to improve the accuracy of detection of position of rotation of above-mentioned output link 14 and the extension 143 established be located on the axis direction of output link 14 and input part 141 and the overlapping position of efferent 142.Like this, by extension 143 is set, the axis direction length that output link 14 just can not occur becomes large situation.That is, on one side can maintain the size of the gearmotor 1 on above-mentioned axis direction, Yi Bian improve the position detection accuracy in the direction of rotation of output link 14.
In addition,, in order further to improve the accuracy of detection of the position of rotation of output link 14, can expect that the structure that magnetic 18 is fixed on to output link 14 as described below is as variation.That is,, as shown in Fig. 6 (a), also can on output link 14, arrange from the outstanding toward the outer side a pair of tongue piece 145 of the outside wall surface of extension 143, and magnetic 18 is sandwiched and is fixed between above-mentioned tongue piece 145.According to said structure, because magnetic 18 is held with the outstanding state of the outer wall from extension 143, therefore can make magnetic 18 be positioned at the position of more leaning on the radial outside of output link 14.Therefore, the detection error that can make the direction of rotation difference because of output link 14 cause further diminishes, thereby can make the accuracy of detection of the position of rotation of output link 14 further improve.In addition,, in said structure, magnetic 18 is fixed to the part that front end that most external is radially equivalent to a pair of tongue piece 145 is separated from each other.Therefore, because the radially outermost outer wall of magnetic 18 is not formed with the wall portion of heavy wall, thereby above-mentioned radially most external is exposed.Therefore, extension 143 size diametrically can be made to than magnetic 18, to be embedded in the structure (structure shown in Fig. 4) of extension 143 extension 143 size diametrically little.
And as shown in Fig. 6 (a), magnetic 18 is fixed to its part and enters the depressed part 146 that is formed at extension 143.Particularly, as by the state representation from output link 14 takes off magnetic 18 in Fig. 6 (b), the outer peripheral face of extension 143 is formed with the protuberance 147 that strides across depressed part 146, and magnetic 18 is fixed between the bottom surface 146a and protuberance 147 that its end face is clipped in depressed part 146.Owing to so not only preventing that magnetic 18 from coming off accidentally, can also prevent that output link 14 from moving in the upper offset of axis direction, therefore can suppress the deviation at the interval of magnetic detecting element 16 and magnetic 18.
At this, from Fig. 6 (b), the substantial middle place of the face relative with the bottom surface 146a of depressed part 146 of protuberance 147 is formed with the projection 147a of given size.Because the mode that magnetic 18 crushes above-mentioned projection 147a with end face is installed, so projection 147a plays the effect of spring, to improve the grip strength of bottom surface 146a and 147 pairs of magnetics 18 of protuberance of depressed part 146.By this, the anticreep performance of magnetic 18 is further improved.
Above embodiments of the present invention are had been described in detail.But the present invention is not limited to above-mentioned execution mode, can in the scope that does not depart from main points of the present invention, carry out various changes.
For example, in the above-described embodiment, the situation that output link 14 is fixed with to magnetic 18 is illustrated, but also can adopt contrary structure, be that output link 14 is fixed with magnetic detecting element 16 and on position on the other side, is provided with the structure of magnetic 18.
In addition, in these execution modes, outer peripheral face at output link 14 is provided with to magnetic 144 everywhere, and the structure that magnetic 18 is optionally installed at a place or two places is therein illustrated, but can be also that for example (circumferential 0 ° (360 °), 120 °, 240 °) are provided with magnetic fixing hole at three places of the outer peripheral face of output link, and the structure that magnetic is optionally installed at a place or two places therein.No matter be which kind of structure, if output link itself is to be provided with magnetic fixing hole or magnetic detecting element installation portion in the many places of its outer peripheral face, and the structure that magnetic or magnetic detecting element are optionally installed in a place or many places therein, without producing multiple output link according to the occupation mode of valve, owing to exchanging use, therefore also have advantages of and can reduce component count.
Claims (10)
1. a gearmotor, it comprises: motor; Acceptance is transmitted the actuating force of the described motor coming and will be transmitted the output link of the actuating force output of the described motor coming by gear train; Magnetic detecting element for detection of the position of rotation of this output link; And the magnetic paired with this magnetic detecting element, it is characterized in that,
In described output link, by integrally formed, be provided with:
Be formed with the cylindrical portion of input part, be passed to the actuating force input input part of the described motor of described gear train;
Be formed with the cylindrical portion of efferent, the actuating force that is imported into the described motor of described input part outputs to efferent; And
Extension, this extension is more outstanding towards radial outside with the cylindrical portion that is formed with described efferent than the cylindrical portion that is formed with described input part,
In the cylindrical portion than being formed with the cylindrical portion of described input part and being formed with described efferent, more by the position of radial outside, near the outer wall radially of described extension, be fixed with any one in described magnetic detecting element and described magnetic.
2. gearmotor as claimed in claim 1, is characterized in that, the position that described input part and described efferent make progress in the footpath of described output link is arranged at position overlapped while observing from the axis direction of described output link.
3. gearmotor as claimed in claim 2, is characterized in that, is provided with described efferent on the axis of described input part.
4. gearmotor as claimed in claim 1, it is characterized in that, the position of described extension on the axis direction of described output link is located at while observing from the direction of the axis quadrature with described output link and described input part or the overlapping position of described efferent.
5. gearmotor as claimed in claim 4, it is characterized in that, described magnetic detecting element or the position of described magnetic on the axis direction of described output link are located at while observing from the direction of the axis quadrature with described output link and described input part or the overlapping position of described efferent.
6. gearmotor as claimed in claim 5, it is characterized in that, on the axis direction of described output link, have towards the hole portion of a side opening with towards the hole portion of opposite side opening, towards the hole portion of a described side opening, be formed with described input part and be formed with described efferent towards the hole portion of described opposite side opening, in the hole portion towards a described side opening or towards the radial outside of the hole portion of described opposite side opening, be formed with extension, described magnetic detecting element or the position of described magnetic on the axis direction of described output link are located at while observing from the direction of the axis quadrature with described output link and the overlapping position of the hole portion of a described side or the hole portion of described opposite side.
7. gearmotor as claimed in claim 6, is characterized in that, towards the hole portion of a described side opening with towards the hole portion of described opposite side opening, is connected to each other and along axis direction, runs through the through hole of described output link.
8. gearmotor as claimed in claim 1, it is characterized in that, when described magnetic detecting element and described magnetic are configured to when relative on described axis direction, at described extension, be formed with recess, this recess has the bearing surface vertical with described axis of described magnetic detecting element and any one institute's butt in described magnetic.
9. gearmotor as claimed in claim 8, is characterized in that, described extension is formed by resin, and the peristome of described recess seals by thermofussion welding.
10. gearmotor as claimed in claim 1, is characterized in that, described extension is formed with a pair of tongue piece, and any one described magnetic detecting element and described magnetic given prominence to and clamped to this pair of tongue piece toward the outer side from the outside wall surface of described extension.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009049252 | 2009-03-03 | ||
| JP2009-049252 | 2009-03-03 |
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| CN101826772A CN101826772A (en) | 2010-09-08 |
| CN101826772B true CN101826772B (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010134600.9A Active CN101826772B (en) | 2009-03-03 | 2010-03-02 | Gear drive electromotor |
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| JP (1) | JP5632622B2 (en) |
| CN (1) | CN101826772B (en) |
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|---|---|---|---|---|
| JP6088237B2 (en) * | 2012-12-19 | 2017-03-01 | 日本電産サンキョー株式会社 | Geared motor and valve drive device |
| JP7027838B2 (en) * | 2017-11-27 | 2022-03-02 | 株式会社リコー | Drives and robots |
| CN108855956B (en) * | 2018-08-03 | 2024-04-09 | 深圳路辉物流设备有限公司 | Magnetic tooth transmission mechanism, magnetic tooth high-speed shunt and sorting device |
| CN109914925A (en) * | 2019-03-18 | 2019-06-21 | 深圳华升高新技术研发有限公司 | A kind of electronic lock drive assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006158108A (en) * | 2004-11-30 | 2006-06-15 | Tokyo Parts Ind Co Ltd | Electric motor with reduction gear |
| CN101123379A (en) * | 2006-08-08 | 2008-02-13 | 日本电产三协株式会社 | Geared motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0257268U (en) * | 1988-10-20 | 1990-04-25 | ||
| JP2521135Y2 (en) * | 1989-03-24 | 1996-12-25 | 株式会社三協精機製作所 | Motor type actuator |
| DE10342756B4 (en) * | 2002-09-17 | 2016-10-06 | Asmo Co., Ltd. | Motor with a connector housing |
| JP4393825B2 (en) * | 2003-09-12 | 2010-01-06 | 株式会社ミツバ | Electric motor with reduction mechanism |
-
2010
- 2010-03-01 JP JP2010043708A patent/JP5632622B2/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006158108A (en) * | 2004-11-30 | 2006-06-15 | Tokyo Parts Ind Co Ltd | Electric motor with reduction gear |
| CN101123379A (en) * | 2006-08-08 | 2008-02-13 | 日本电产三协株式会社 | Geared motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010233446A (en) | 2010-10-14 |
| JP5632622B2 (en) | 2014-11-26 |
| CN101826772A (en) | 2010-09-08 |
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