CN104421349A - Friction mechanism and gear motor - Google Patents
Friction mechanism and gear motor Download PDFInfo
- Publication number
- CN104421349A CN104421349A CN201410321008.8A CN201410321008A CN104421349A CN 104421349 A CN104421349 A CN 104421349A CN 201410321008 A CN201410321008 A CN 201410321008A CN 104421349 A CN104421349 A CN 104421349A
- Authority
- CN
- China
- Prior art keywords
- face
- gear
- main body
- body portion
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Disclosed are a friction mechanism and a gear motor with the same. According to the friction mechanism and the gear motor, reduced strength and friction torque deviation caused by a confluent line can be inhibited even under the condition of forming a gear part through resin molding. The friction mechanism (9) comprises a gear part (92), a rotating part (91) and a force applying part (93), the gear part (92) forms a gear portion (926) on a body (923) that is cylindrical and extends along the motor axis direction (S), the rotating part (91) is provided with a plurality of elastic deformation portions (915), and the force applying part (93) applies force to the elastic deformation portions so that the elastic deformation portions and an inner circumference (923p) of the body are in elastic contact. When the gear part is formed through resins, and in a mold, an annular sprue is arranged at other positions apart from portions with the gear portion (926) and the inner circumference (923p). Thereby, a cut-off portion of the annular sprue is located at positions of the gear part apart from positions with the gear portion and the inner circumference (923p).
Description
Technical field
The present invention relates to and be a kind ofly arranged at the friction mechanism of gear train etc. and there is the gear motor of friction mechanism.
Background technique
In gear motor etc.; be used for the gear of gear train and the friction mechanism of motor as protection, propose the structure (with reference to patent documentation 1) being made the inner peripheral surface Elastic Contact of the main body portion of the resiliently deformable portion of rotary component and the cylindrical shape of geared parts by force application part.
Patent documentation 1: Japanese Unexamined Patent Publication 2010-78009 publication
When forming the friction mechanism described in patent documentation 1, if adopting three spot pouring mouth formulas by during ester moulding formative gear parts, then interflow line can be produced between gate cutting portion, therefore there is the problem that intensity reduces.Further, if adopt three spot pouring mouth formulas to be shaped, due to the flowing instability of resin, therefore also there is following problem: reduce with the out of roughness of the inner peripheral surface of rotary component sliding contact in main body portion, thus friction torque easily produces deviation.
Summary of the invention
In view of the above-mentioned problems, even if problem of the present invention is to provide a kind of when by ester moulding formative gear parts, also can suppresses the friction mechanism of intensity reduction and the friction torque deviation caused because of interflow line and there is the gear motor of friction mechanism.
For solving the method for problem
In order to solve above-mentioned problem, the invention is characterized in, friction mechanism has geared parts and rotary component, the gear part of described geared parts is formed at the main body portion of the cylindrical shape extended in the axial direction, described rotary component has the multiple resiliently deformable portions with the side face of the side in the outside of described main body portion and inner side Elastic Contact diametrically, described geared parts is formed from a resin, and the position except the side face except described gear part and one has ring gate cutting portion.
In the present invention, only otherwise apply excessive load to rotary component or geared parts, rotary component and geared parts together will be rotated by the friction apply power between rotary component and geared parts.On the other hand, when applying larger load to the side in rotary component and geared parts, due to idle running can be produced between rotary component and geared parts, therefore, it is possible to prevent rotary component or breakage occurs for the gear that is connected with geared parts or motor.Here, geared parts is formed from a resin, and is manufactured by the shaping employing ring gate.Therefore, different from the situation of employing three spot pouring mouth formula, do not produce interflow line, thus there is enough intensity.And different from the situation of employing three spot pouring mouth formula, resin flows during owing to being shaped is more stable, therefore improves the out of roughness with the side face of rotary component sliding contact in main body portion.Stable friction torque can be obtained thus.Further, because ring gate is configured in the position except the side face of gear part and a side, therefore ring gate cutting portion can not be remained at the side face of gear part or a side.Therefore, ring gate cutting portion can not bring obstacle to the action of the gear train and friction mechanism that employ geared parts.
In the present invention, preferred described gear part is arranged at the end of the side by described axial direction of described main body portion, and described ring gate cutting portion is present in described main body portion than the tip side of described gear part by the opposing party of described axial direction.By this structure, during shaping, resin is filled into the part in formative gear portion by high pressure, therefore, it is possible to highi degree of accuracy formative gear portion.
In the present invention, preferred described ring gate cutting portion is present in described main body portion than the tip side of the neutral position of described axial direction by described the opposing party.By this structure, due to be shaped time by high pressure by the part of resin filling to formative gear portion, therefore, it is possible to highi degree of accuracy formative gear portion.
In the present invention, preferred described ring gate cutting portion is present in the annular end face of the opposite side towards described axial direction in described main body portion.By this structure, when being shaped, resin is easily towards axial direction flowing, thus can with highi degree of accuracy formative gear portion etc.
In the present invention, preferred described main body portion has the first annular end face and the second annular end face, described first annular end face is towards the opposite side of described axial direction, described second annular end face than described first annular end face by the position of the side of described axial direction towards the opposite side of described axial direction, and described ring gate cutting portion is present in described second annular end face.By this structure, although ring gate cutting portion is present in the second annular end face, but owing to having the first annular end face than the second annular end face by the position of opposite side of axial direction, therefore ring gate cutting portion can not be present in the end of the most opposite side by axial direction of main body portion in geared parts as protuberance.
In the present invention, preferably described first annular end face is overlapping on described axial direction with described rotary component, and is located by described rotary component in the side of described axial direction.
In the present invention, described ring gate cutting portion also can be adopted to be present in the structure at the edge of the annular end face of the opposite side towards described axial direction in described main body portion.
In the present invention, preferred described main body portion has the first annular end face and described second annular end face, described first annular end face is towards the opposite side of described axial direction, described second annular end face than described first annular end face by the position of the side of described axial direction towards the opposite side of described axial direction, and described ring gate cutting portion is present in the outer ledge of described second annular end face.
In the present invention, described ring gate cutting portion also can be adopted to be present in the structure of the side face of any one party in the outside of described main body portion and inner side.
In the present invention, preferred described ring gate cutting portion is formed at the part formed as the outer circumferential face in the outside of described main body portion.
In the present invention, preferred described main body portion has first body and is formed at than described first body by the side of described axial direction and outside dimension second main body portion larger than the outside dimension of first body, and described gear part is formed at the side face of the opposing party in the outside of described second main body portion and inner side.By this structure, can in the second main body portion (large-diameter portion) the formative gear portion of geared parts.Further, gear part is formed at part outstanding towards radial outside in main body portion, even if therefore when the parts such as other gears are positioned at the opposite side by axial direction relative to gear part, also can not interfere with geared parts.
In the present invention, preferred friction mechanism has and to be exerted a force towards radial direction in described resiliently deformable portion and to make the force application part of the side face Elastic Contact of described resiliently deformable portion and one.By this structure, resiliently deformable portion can be made with the elasticity of regulation and the circumferential contact of geared parts, thus suitable friction apply power can be produced.
In this case, when preferably observing from radial direction, described force application part is configured in the position overlapping with described gear part.Because gear part is formed as heavy wall, even if therefore apply the active force of force application part to the main body portion of geared parts, also not easily produce stress at the main body portion of geared parts and the distortion that causes and crackle.Further, because gear part is formed with highi degree of accuracy, therefore, it is possible to produce suitable friction apply power.
In the present invention, the side face Elastic Contact of preferred described force application part and described inner side.
In the present invention, preferred described gear part is arranged at the end of the side by described axial direction of described main body portion, and described ring gate cutting portion is present in the end face of the side towards described axial direction in described main body portion.
Friction mechanism involved in the present invention is used for gear motor.In this case, the gear train that gear motor has motor part, output block and the rotation of described motor transmitted to described output block, it is characterized in that, one in two gears that described gear train comprises is described geared parts, and another is described rotary component.
Invention effect
In the present invention, geared parts is formed from a resin, and is manufactured by the shaping employing ring gate.Therefore, different from the situation of employing three spot pouring mouth formula, due to interflow line can not be produced, therefore there is enough intensity.And different from employing three spot pouring mouth formula, because resin flows is more stable when being shaped, therefore improve the out of roughness with the side face of rotary component sliding contact in main body portion, so stable friction torque can be obtained.Further, ring gate is configured in the position except the side face of gear part and a side, and therefore ring gate cutting portion can not remain in the side face of gear part or a side.Ring gate cutting portion can not bring obstacle to the action of the gear train and friction mechanism that employ geared parts thus.
Accompanying drawing explanation
The explanatory drawing of the gear motor of Fig. 1 (a) ~ Fig. 1 (c) involved by embodiments of the present invention 1.
Fig. 2 (a) ~ Fig. 2 (d) is for being installed in the explanatory drawing of the friction mechanism of the gear motor involved by embodiments of the present invention 1.
The explanatory drawing that be installed in the friction mechanism of gear motor embodiments of the present invention 1 involved by of Fig. 3 (a) ~ Fig. 3 (c) for observing from output opposition side.
Fig. 4 (a) ~ Fig. 4 (d) is the explanatory drawing of the geared parts of the friction mechanism for the gear motor involved by embodiments of the present invention 1.
Fig. 5 (a) ~ Fig. 5 (d) is the explanatory drawing of the geared parts of the friction mechanism for the gear motor involved by embodiments of the present invention 2.
Fig. 6 (a) ~ Fig. 6 (d) is the explanatory drawing of the geared parts of the friction mechanism for the gear motor involved by embodiments of the present invention 3.
Fig. 7 (a) ~ Fig. 7 (d) is the explanatory drawing of the geared parts of the friction mechanism for the gear motor involved by embodiments of the present invention 4.
(symbol description)
1 gear motor
2 motor part
3 rotors
4 stators
6 gear trains
9 friction mechanisms
91 rotary components
92 geared parts
93 force application parts
651 output shafts
915 resiliently deformable portions
921 matching holes
The end face of 922 outlet sides
923 main body portioies
The end of 923a outlet side
923b exports the end of opposition side
The inner peripheral surface of 923p main body portion
The outer circumferential face of 923r main body portion
924 first annular end face
925 second annular end face
The edge of 925e second annular end face
G ring gate
G0 ring gate cutting portion
Embodiment
With reference to accompanying drawing, embodiments of the present invention are described.In addition, in friction mechanism involved in the present invention, although the resiliently deformable portion of rotary component can with any one circumferential contact in the side face of the side face in the outside of the main body portion of geared parts and inner side, but in the following description, be described centered by the mode of the circumferential contact of the inner side of the main body portion of the resiliently deformable portion of rotary component and geared parts.Therefore, " side face of a side " in the present invention is " inner peripheral surface ", and " side face of the opposing party " is " outer circumferential face ".And, in friction mechanism involved in the present invention, although gear part can be formed in the outlet side of the main body portion of geared parts and export the end of any side in opposition side, but be described centered by the mode in the following description, being formed in the end of the outlet side of the main body portion of geared parts by gear part.Therefore, " side of axial direction " in the present invention is " outlet side ", and " opposite side of axial direction " is " output opposition side ".Further, in the following description, not only the axial direction of motor part 2 is described as " motor axis direction S ", the direction parallel with the axial direction of motor part 2 is also described as " motor axis direction S ".
Mode of execution 1
(overall structure)
The explanatory drawing of the gear motor of Fig. 1 (a) ~ Fig. 1 (c) involved by embodiments of the present invention 1, Fig. 1 (a), Fig. 1 (b), Fig. 1 (c) are respectively the transverse sectional view of structure of the gear train representing gear motor, longitudinal sectional view and represent the unfolded drawing of engagement of the gear in gear train.
In Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), apply gear motor 1 of the present invention and comprise the motor part 2 with stepping motor structure, motor part 2 is briefly made up of stator 4 and rotor 3.Stator 4 has stacked two stator pack 4a, 4b on the S of motor axis direction, and in stator pack 4a, 4b, external stator core 41 configures in mode opposed on the S of motor axis direction with inner-stator iron core 42.External stator core 41 and inner-stator iron core 42 all have circular lip part and from the inner circumference edge of lip part to the pole tooth of motor axis direction S bending.Under state external stator core 41 and inner-stator iron core 42 configured along motor axis direction S, the pole tooth of external stator core 41 and the pole tooth of inner-stator iron core 42 are circumferentially alternately arranged.
Rotor 3 configures in the mode coaxial with stator 4 in the inner side of stator 4.Rotor 3 comprises the permanent magnet 31 of the rotor subject 33 with axis hole 330 and the outer circumferential face being fixed on this rotor subject 33, and the outer circumferential face of permanent magnet 31 is opposed with pole tooth.The fulcrum 70 that this rotor 3 is embedded in axis hole 330 supports as rotating.Fulcrum 70 is the stationary axle that its two ends are supported with the motor outer cover 50 of the upper surface covering motor field frame 5 by the bottom 51 of motor field frame 5.The end by motor outer cover 50 side in rotor subject 33 becomes the running shaft 34 at outer circumferential face with rotor pinion 35.In the motor part 2 so formed, with running shaft 34 the side of giving prominence to for outlet side S1, when using the side contrary with it as output opposition side S2, in the stator pack 4b exporting opposition side S2, external stator core 41 is formed as a part for the bottom 51 of motor field frame 5.
The inner-stator iron core 42 of two stator pack 4a, 4b carries out insert part forming when resin forms coil rack 86, and is covered by the lip part 88 of coil rack 86.At this moment, terminal retention portion 85 is also formed with in resin portion 8.The part that resin portion 8 is forming coil rack 86 has cylindrical part 87 and circular lip part 88, described cylindrical part 87 is by surrounding's encirclement of pole tooth, described circular lip part 88 is expanding in the end of the motor axis direction S of cylindrical part 87, in the region divided by cylindrical part 87 and lip part 88, be wound with coil 45.Coil 45 is two phase windings that two spirals are wound in two stator pack 4a, 4b respectively, is wound in stator pack 4a, the intermediate portion of coil 45 of 4b drawn as common spiral.Therefore, be five from the radical of the end of the spiral of stator 4 extraction, the end of this spiral, after being bundled in the motor side terminal 191 kept by terminal retention portion 85, is electrically connected with motor side terminal 191 by soldering.Be configured with the connector case 11 keeping external connection terminals 192 at the outer circumferential side of motor side terminal 191, motor side terminal 191 is electrically connected by flexible printed circuit board 12 with external connection terminals 192.
The gear motor 1 of present embodiment has the gear train 6 formed by multiple gear, being rotated through gear train 6 and outputting to outside of the rotor 3 of motor part 2.In the present embodiment, gear train 6 has five gears 61,62,63,64,65, and last gear 65 has output shaft 651 (output block).Here, four gears 61,62,63,64 except last gear 65 are all supported as rotating by fulcrum 71,72,73,74, the two ends of described fulcrum 71,72,73,74 are fixed in the base plate 55 of motor field frame 5 and motor outer cover 50 supports, and the axle portion 652,653 being formed at himself of last gear 65 is supported as rotating by the bearing portion 551 of the bearing portion 501 of motor outer cover 50 side and base plate 55 side.
In the present embodiment, the large diameter gear portion 611 of the first gear 61 engages with the rotor pinion 35 of outer circumferential side of the outlet side S1 being formed at running shaft 34, and the large diameter gear portion 926 of the second gear 62 engages with the small-diameter gear portion 612 of gear 61.The large diameter gear portion 631 of the 3rd gear 63 engages with the small-diameter gear portion 914 of gear 62, and the large diameter gear portion 641 of the 4th gear 64 engages with the small-diameter gear portion 632 of gear 63.Further, the gear part 655 of last gear 65 engages with the small-diameter gear portion 642 of gear 64.Gear train 6 is configured to train of reduction gears like this.Here, five gears 61,62,63,64,65 are configured at rotor pinion 35 around.
(structure of friction mechanism)
Fig. 2 (a) ~ Fig. 2 (d) for being installed in the explanatory drawing of the friction mechanism of the gear motor 1 involved by embodiments of the present invention 1, the stereogram of the decomposing state specifically of friction mechanism that Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), Fig. 2 (d) are respectively the stereogram of the friction mechanism observed from outlet side, sectional view, the exploded view of friction mechanism observed from outlet side and observe from outlet side.Fig. 3 (a) ~ Fig. 3 (c) for from exporting the explanatory drawing being installed in the friction mechanism of the gear motor 1 involved by embodiments of the present invention 1 observed of opposition side, Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) be respectively from the stereogram exporting the friction mechanism that opposition side is observed, from export the friction mechanism that opposition side is observed exploded view and from the stereogram of decomposing state specifically exporting the friction mechanism that opposition side is observed.
In the gear motor 1 illustrated with reference to Fig. 1 (a) ~ Fig. 1 (c), if motor part 2 action under the state applying excessive loads to output shaft 651, then breakage may be produced for the gear 61,62,63,64,65 of gear train 6 or rotor pinion 35.Therefore the friction mechanism 9 worked as torque limiter is formed in the midway of gear train 6.In the present embodiment, for the gear 62 in the gear 61,62,63,64,65 of gear train 6 forms friction mechanism 9.
In Fig. 2 (a) ~ Fig. 2 (d) and Fig. 3 (a) ~ Fig. 3 (c), the friction mechanism 9 being formed at gear 62 has the rotary component 91 be made up of resins such as POM (polyoxymethylene), the geared parts 92 be made up of resins such as PBT (polybutylene-terephthalate) and force application part 93, in the present embodiment, force application part 93 is the C-washer of the stainless steel be cut off in certain of circumference.
Rotary component 91 is the resin forming product of polyacetal resin etc., and there is cylindric central axle portion 911 and discoid along portion 912, the central axle portion 911 of described cylindrical shape extends along the outlet side S1 of the motor axis direction S of gear 62, described discoid outstanding along portion 912 from the midway part of the length direction of central axle portion 911 towards radial direction.In central axle portion 911, gear part 914 is being formed with, the small-diameter gear of this gear part 914 for engaging with the 3rd gear 63 shown in Fig. 1 (a) ~ Fig. 1 (c) from along portion 912 towards the circumferential lateral surface exporting the shaft end 913 that opposition side S2 gives prominence to.Further, the axis hole 910 embedded for the fulcrum 72 shown in Fig. 1 (a) ~ Fig. 1 (c) is formed at central axle portion 911.
In rotary component 91, extend multiple plate-like elastic variant part 915 from along the outer periphery in portion 912 towards the outlet side S1 of motor axis direction S, resiliently deformable portion 915 is in the circumferential in arc-shaped bend.In the present embodiment, resiliently deformable portion 915 is circumferentially configured with two, and is formed as the structure cylindrical part split with slit 917.In this rotary component 91, between the inner circumferential side and the circumferential lateral surface of central axle portion 911 in resiliently deformable portion 915, be formed with annular slot 916.
The force application part 93 of c-shaped washer-shaped is had in the press-in of the inner side of annular slot 916.Also helical spring can be used as force application part 93.Here, the internal diameter size not applying the force application part 93 under external force state is more much bigger than the outside dimension of central axle portion 911.Further, the outside dimension not applying the force application part 93 under external force state is larger than the diameter of a circle limited by the inner peripheral surface in resiliently deformable portion 915.Therefore, if be pressed into force application part 93 to annular slot 916, then the state of force application part 93 in contracted diameter is out of shape, and by the restoring force (elastic force) of this shape, is pushed open in resiliently deformable portion 915 to radial outside.Be formed with small step 915e in the inner circumferential side in resiliently deformable portion 915, limit the position of force application part 93 on the S of motor axis direction by this step 915e.
In the rotary component 91 formed like this, first protuberance 918 outstanding from the middle position of the circumference in resiliently deformable portion 915 towards radial outside is formed in the end of the outlet side S1 in two resiliently deformable portions 915, in the outer circumferential face in resiliently deformable portion 915, be positioned at relative to the first protuberance 918 part exporting opposition side S2 and be formed as tabular surface 915c.
Further, in the end of the output opposition side S2 of rotary component 91, be formed with two the second protuberances 919 given prominence to towards radial outside from circumference at the discoid outer circumferential face along portion 912, this second protuberance 919 is outstanding from slit 917 towards radial outside.Recess 919a is formed in the face of the output opposition side S2 of the second protuberance 919.
(structure of geared parts 92)
Fig. 4 (a) ~ Fig. 4 (d) is the explanatory drawing of the geared parts 92 of the friction mechanism 9 for the gear motor 1 involved by embodiments of the present invention 1, Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), Fig. 4 (d) be respectively the plan view of the geared parts 92 observed from outlet side S1, side view, from the exploded view and the sectional view that export the geared parts 92 that opposition side S2 observes.
As shown in Fig. 2 (a) ~ Fig. 2 (d) and Fig. 4 (a) ~ Fig. 4 (d), geared parts 92 has the main body portion 923 of the cylindrical shape that the motor axis direction S along gear 62 extends.Main body portion 923 has first body 928 and is leaning on than first body 928 outside dimension of the second main body portion 929, second main body portion 929 of the position of the outlet side S1 of motor axis direction S formation larger than the outside dimension of first body 928.
Gear part 926 is formed with, the large diameter gear of gear part 926 for engaging with the first gear 61 shown in Fig. 1 (a) ~ Fig. 1 (c) at the outer circumferential face of the second main body portion 929.The center hole of geared parts 92 is the matching hole 921 embedded for the resiliently deformable portion 915 of rotary component 91.
In the end 923b (the end 923b of the output opposition side S2 of first body 928) of the output opposition side S2 of main body portion 923, circular protrusion 927 is given prominence to from the radially inner side of first body 928 towards output opposition side S2.Therefore, the first annular end face 924 is formed with because of circular protrusion 927 in main body portion 923, described first annular end face 924 is towards the output opposition side S2 of motor axis direction S, be formed with the second annular end face 925 at the radial outside of circular protrusion 927, described second annular end face 925 is depending on the output opposition side S2 of position towards motor axis direction S of the outlet side S1 of motor axis direction S than the first annular end face 924.Further, be formed with circular step portion 921b at the end 923a (the end 923a of the outlet side S1 of the second main body portion 929) of the outlet side S1 of main body portion 923, described circular step portion 921b along the edge of matching hole 921 and end face towards outlet side S1.
When using geared parts 92, rotary component 91 and the force application part 93 so formed to form friction mechanism 9 (gear 62), under the state of not installing force application part 93, the resiliently deformable portion 915 of rotary component 91 is out of shape towards inner elastic, in this state, after the resiliently deformable portion 915 of rotary component 91 is embedded into the matching hole 921 of geared parts 92 from output opposition side S2, force application part 93 is pressed from outlet side S1 towards the inner side in resiliently deformable portion 915.Or also can under the state of having installed force application part 93, the resiliently deformable portion 915 of rotary component 91 is out of shape towards inner elastic, in this state, the resiliently deformable portion 915 of rotary component 91 is embedded into the matching hole 921 of geared parts 92 from output opposition side S2.No matter in any situation, when observing from radial direction, resiliently deformable portion 915 all can press towards radial outside in the position overlapping with gear part 926 by force application part 93.Consequently, resiliently deformable portion 915 abuts with inner peripheral surface 923p (the inner peripheral surface 923p of the main body portion 923) elasticity of matching hole 921 and carries out friction apply.Therefore, only otherwise apply excessive load to rotary component 91 side, rotary component 91 and geared parts 92 together will be rotated by the friction apply power between rotary component 91 and geared parts 92.On the other hand, when applying larger load to rotary component 91, dally owing to producing between rotary component 91 and geared parts 92, therefore, it is possible to prevent rotary component 91 or the gear that is connected with geared parts 92 and motor damaged.
In the present embodiment, when the resiliently deformable portion 915 of rotary component 91 being embedded into the matching hole 921 of geared parts 92 from output opposition side S2, the first protuberance 918 of rotary component 91 engages with it from outlet side S1 in the mode of the circular step portion 921b covering geared parts 92.Therefore, geared parts 92 can be decided towards the position exporting opposition side S2 by circular step portion 921b, and prevents rotary component 92 from coming off from matching hole 921.And, when the resiliently deformable portion 915 of rotary component 91 being embedded into the matching hole 921 of geared parts 92 from output opposition side S2, second protuberance 919 of rotary component 91 abuts with the first annular end face 924 of geared parts 92, and geared parts 92 is decided towards the position of outlet side S1 by the first annular end face 924.
(manufacture method of geared parts 92)
In the present embodiment, geared parts 92 is the resin forming product of PBT etc., when formed gear parts 92, as shown in Fig. 4 (d), position in a mold except the part of formative gear portion 926 and inner peripheral surface 923p, as illustrated in arrow, configuration ring gate G.Therefore, in geared parts 92, as shown in the single dotted broken line of Fig. 4 (c), ring gate cutting portion G0 is present in the position except gear part 926 and inner peripheral surface 923p.
Especially in the present embodiment, in a mold, ring gate G is configured in part than formative gear portion 926 by exporting the position of the 923b side, end of opposition side S2.Therefore, in geared parts 92, ring gate cutting portion G0 is present in than gear part 926 by exporting the position of the 923b side, end of opposition side S2.Especially, in a mold, ring gate G is configured in the neutral position of the ratio motor axis direction S in the part forming main body portion 923 by exporting the position of the 923b side, end of opposition side S2.Therefore, in geared parts 92, ring gate cutting portion G0 is present in the neutral position of the ratio motor axis direction S of main body portion 923 by exporting the position of the 923b side, end of opposition side S2.
More specifically, in the present embodiment, in a mold, ring gate G is configured in the part of the formation in main body portion 923 towards second annular end face 925 of the output opposition side S2 of motor axis direction S.Therefore, in geared parts 92, ring gate cutting portion G0 is present in second annular end face 925 of the output opposition side S2 towards motor axis direction S in main body portion 923.
(main efficacy results of present embodiment)
As illustrated above, in this enforcement side, geared parts 92 is formed from a resin, and geared parts 92 is manufactured by the shaping that make use of ring gate G.Therefore, different from the situation of employing three spot pouring mouth formula, owing to not producing interflow line, thus there is enough intensity.Further, different from the situation of employing three spot pouring mouth formula, when being shaped, the flowing of resin is stablized, therefore improve in main body portion 923 with the out of roughness of the inner peripheral surface 923p of rotary component 91 sliding contact.Thereby, it is possible to obtain stable friction torque.Further, because ring gate G is configured in the position except gear part 926 and inner peripheral surface 923p, therefore ring gate cutting portion G0 can not be remained in gear part 926 or inner peripheral surface 923p.Therefore, ring gate cutting portion G0 can not bring obstacle to the action of the gear train 6 and friction mechanism 9 that employ geared parts 92.
Further, in a mold, ring gate G is configured in part than formative gear portion 926 by exporting the position of the 923b side, end of opposition side S2.Especially in the present embodiment, in a mold, ring gate G is configured in the neutral position of the ratio motor axis direction S in the part forming main body portion 923 by exporting the position of the 923b side, end of opposition side S2.Therefore, in the formative gear portion, position 926 that distance ring gate G is far away, so when being shaped, be partially filled resin by high pressure to what form gear part 926.Thereby, it is possible to highi degree of accuracy formative gear portion 926.
Further, in the present embodiment, in a mold, ring-type cast gate G is configured in the part of formation towards second annular end face 925 of the output opposition side S2 by motor axis direction S of main body portion 923.Therefore, when being shaped, resin easily flows to the outlet side S1 of motor axis direction S, therefore, it is possible to highi degree of accuracy formative gear portion 926 etc.
And the second annular end face 925 is positioned at than the position of the first annular end face 924 by the outlet side S1 of motor axis direction S.Therefore, even if having ring gate cutting portion G0 in the second annular end face 925, the end (the first annular end face 924) by opposite side on ring gate cutting portion G0 also can not remain in main body portion 923 in geared parts 92 axial direction as protuberance.Therefore, it is possible to by the first annular end face 924 for the location of rotary component 91 S on motor axis direction.
Further, employ and resiliently deformable portion 915 exerted a force towards radial direction and makes the force application part 93 of resiliently deformable portion 915 and the inner peripheral surface 923p Elastic Contact of geared parts 92.Therefore, it is possible to make resiliently deformable portion 915 contact with the inner peripheral surface 923p of geared parts 92, so suitable friction apply power can be produced with the elasticity of regulation.
Further, when observing from radial direction, force application part 93 is configured in the position overlapping with gear part 926.Gear part 926 is formed as heavy wall, even if therefore the active force of force application part 93 is applied to the main body portion 923 of geared parts 92, also not easily produces stress at the main body portion 923 of geared parts 92 and the distortion caused or crackle.Further, gear part 926 is formed, therefore, it is possible to produce suitable friction apply power with highi degree of accuracy.
And, because gear part 926 is formed in the second main body portion 929 outstanding towards radial outside in main body portion 923, therefore, even if when the parts such as other gears to be positioned at the output opposition side S2 of motor axis direction S relative to gear part 926, also can not to produce with geared parts 92 and interfere.
Mode of execution 2
Fig. 5 (a) ~ Fig. 5 (d) is the explanatory drawing of the geared parts 92 of the friction mechanism 9 for the gear motor 1 involved by embodiments of the present invention 2, Fig. 5 (a), Fig. 5 (b), Fig. 5 (c), Fig. 5 (d) be respectively the plan view of the geared parts 92 observed from outlet side S1, side view, from the exploded view and the sectional view that export the geared parts 92 that opposition side S2 observes.In addition, the basic structure of present embodiment and hereinafter described mode of execution 3,4 is identical with the structure of mode of execution 1, therefore marks identical symbol to common part and illustrates, and omit the explanation of these parts.
Geared parts 92 shown in Fig. 5 (a) ~ Fig. 5 (d) is also identical with mode of execution 1, is the resin forming product of PBT etc.In the present embodiment, when shaping geared parts 92, as shown in Fig. 5 (d), in a mold, the edge configuration ring gate G in the outside of the part of the second annular end face 925 in formation main body portion 923, described second annular end face 925 is towards the output opposition side S2 of motor axis direction S.Therefore, in geared parts 92, ring gate cutting portion G0 is present in the edge 925e towards the outside of second annular end face 925 of the output opposition side S2 of motor axis direction S in main body portion 923.
Therefore, in the present embodiment, identical with mode of execution 1, also can not remain ring gate cutting portion G0 in gear part 926 and inner peripheral surface 923p, therefore ring gate cutting portion G0 can not bring obstacle to the action of the gear train 6 and friction mechanism 9 that employ geared parts 92.Further, due to ring gate G configure in a mold than the part in formative gear portion 926 by the position of the 923b side, end of output opposition side S2, therefore gear part 926 is formed in the position away from ring gate G.So, due to when being shaped, by high pressure by the part of resin filling to formative gear portion 926, therefore, it is possible to play the effect identical with mode of execution 1, namely can with highi degree of accuracy formative gear portion 926 etc.
Mode of execution 3
Fig. 6 (a) ~ Fig. 6 (d) is the explanatory drawing of the geared parts 92 of the friction mechanism 9 for the gear motor 1 involved by embodiments of the present invention 3, Fig. 6 (a), Fig. 6 (b), Fig. 6 (c), Fig. 6 (d) be respectively the plan view of the geared parts 92 observed from outlet side S1, side view, from the exploded view and the sectional view that export the geared parts 92 that opposition side S2 observes.
Geared parts 92 shown in Fig. 6 (a) ~ Fig. 6 (d) is also identical with mode of execution 1, is the resin forming product of PBT etc.In the present embodiment, when formed gear parts 92, as shown in Fig. 6 (d), in a mold, ring gate G is configured in the neutral position of the ratio motor axis direction S in the part of the outer circumferential face 923r forming main body portion 923 by exporting the position of the 923b side, end of opposition side S2.Therefore, as shown in Fig. 6 (b), in geared parts 92, ring gate cutting portion G0 is present in the neutral position of the ratio motor axis direction S in the outer circumferential face 923r of main body portion 923 by exporting the position of the 923b side, end of opposition side S2.
Therefore, in the present embodiment, identical with mode of execution 1, ring gate cutting portion G0 can not be remained in gear part 926 or inner peripheral surface 923p, therefore, can play the effect identical with mode of execution 1, namely ring gate cutting portion G0 can not bring obstacle etc. to the action of the gear train 6 and friction mechanism 9 that employ geared parts 92.
Mode of execution 4
Fig. 7 (a) ~ Fig. 7 (d) is the explanatory drawing of the geared parts 92 of the friction mechanism 9 for the gear motor 1 involved by embodiments of the present invention 4, Fig. 7 (a), Fig. 7 (b), Fig. 7 (c), Fig. 7 (d) be respectively the plan view of the geared parts 92 observed from outlet side S1, side view, from the exploded view and the sectional view that export the geared parts 92 that opposition side S2 observes.
Geared parts 92 shown in Fig. 7 (a) ~ Fig. 7 (d) is also identical with mode of execution 1, is the resin forming product of PBT etc.In the present embodiment, when formed gear parts 92, as shown in Fig. 7 (d), the partial configuration ring gate G of the end face 922 of the outlet side S1 of formation main body portion 923 in a mold.Therefore, as shown in Fig. 7 (a), in geared parts 92, ring gate cutting portion G0 is present in the end face 922 by outlet side S1 of main body portion 923.
Therefore, present embodiment is identical with mode of execution 1, ring gate cutting portion G0 can not be remained in gear part 926 and inner peripheral surface 923p, therefore, it is possible to play the effect identical with mode of execution 1, namely ring gate cutting portion G0 can not bring obstacle etc. to the action of the gear train 6 and friction mechanism 9 that employ geared parts 92.
Other mode of executions
In the above-described embodiment, the resiliently deformable portion 915 of rotary component 91 contacts with the inner peripheral surface 923p of the main body portion 923 of geared parts 92, but also can adopt the structure that the resiliently deformable portion 915 of rotary component 91 contacts with the outer circumferential face 923r of the main body portion 923 of geared parts 92.In this case, " side face of a side " in the present invention is " outer circumferential face 923r ", and " side face of the opposing party " is " inner peripheral surface 923p ".
Further, in the above-described embodiment, gear part 926 is formed at the end 923a of the outlet side S1 of the main body portion 923 of geared parts 92, but gear part 926 also can be formed at the end 923b by exporting opposition side S2 of the main body portion 923 of geared parts 92.In this case, " side of motor axis direction S " in the present invention is " exporting opposition side S2 ", and " opposite side of motor axis direction S " is " outlet side S1 ".
In the above-described embodiment, gear 62 is provided with friction mechanism 9, but also friction mechanism 9 can be set at other gears 61,63,64,65.
Claims (16)
1. a friction mechanism, is characterized in that, described friction mechanism comprises:
Geared parts, the gear part of described geared parts is formed at the main body portion of the cylindrical shape extended in the axial direction; And
Rotary component, it has the multiple resiliently deformable portions with the side face of the side in the outside of described main body portion and inner side Elastic Contact diametrically,
Described geared parts is formed from a resin, and the position except the side face except described gear part and one has ring gate cutting portion.
2. friction mechanism according to claim 1, is characterized in that,
Described gear part is arranged at the end of a side of the described axial direction of described main body portion,
Described ring gate cutting portion is present in the position of gear part described in the ratio in described main body portion by the tip side of the opposing party of described axial direction.
3. friction mechanism according to claim 2, is characterized in that,
Described ring gate cutting portion is present in the position of neutral position by the tip side of described the opposing party of axial direction described in the ratio in described main body portion.
4. friction mechanism according to claim 2, is characterized in that,
Described ring gate cutting portion is present in the annular end face of the opposite side towards described axial direction in described main body portion.
5. friction mechanism according to claim 2, is characterized in that,
Described main body portion has:
First annular end face, it is towards the opposite side of described axial direction; And
Second annular end face, its than described first annular end face by the position of the side of described axial direction towards the opposite side of described axial direction,
Described ring gate cutting portion is present in described second annular end face.
6. friction mechanism according to claim 5, is characterized in that,
Described rotary component is located by described first annular end face and side of on described axial direction overlapping with described rotary component on described axial direction.
7. friction mechanism according to claim 2, is characterized in that,
Described ring gate cutting portion is present in the edge of the annular end face of the opposite side towards described axial direction in described main body portion.
8. friction mechanism according to claim 2, is characterized in that,
Described main body portion has:
First annular end face, it is towards the opposite side of described axial direction; And
Second annular end face, its than described first annular end face by the position of the side of described axial direction towards the opposite side of described axial direction,
Described ring gate cutting portion is present in the outer ledge of described second annular end face.
9. friction mechanism according to claim 2, is characterized in that,
Described ring gate cutting portion is present in the side face of any one party in the outside of described main body portion and inner side.
10. friction mechanism according to claim 9, is characterized in that,
Described ring gate cutting portion is formed at the part formed as the outer circumferential face in the outside of described main body portion.
11. friction mechanisms according to claim 1, is characterized in that,
Described main body portion has first body and is formed in than described first body by the position of side of described axial direction and outside dimension second main body portion larger than the outside dimension of first body,
Described gear part is formed at the side face of the opposing party in the outside of described second main body portion and inner side.
12. friction mechanisms according to claim 1, is characterized in that,
Described friction mechanism has force application part, and described force application part diametrically to described resiliently deformable portion force, and makes the side face Elastic Contact of described resiliently deformable portion and one.
13. friction mechanisms according to claim 12, is characterized in that,
When observing from radial direction, described force application part is configured in the position overlapping with described gear part.
14. friction mechanisms according to claim 12, is characterized in that,
The side face Elastic Contact of described force application part and described inner side.
15. friction mechanisms according to claim 1, is characterized in that,
Described gear part is arranged at the end of the side by described axial direction of described main body portion,
In described main body portion, described ring gate cutting portion is present in towards the end face of the side of described axial direction.
16. 1 kinds of gear motors, have the friction mechanism described in any one in claim 1 to 15, it is characterized in that, described gear motor has:
Motor part;
Output block; And
Gear train, the rotation of described motor is transmitted to described output block by it,
One in two gears that described gear train comprises is described geared parts, and another is described rotary component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013170016A JP6276538B2 (en) | 2013-08-20 | 2013-08-20 | Friction mechanism and geared motor |
| JP2013-170016 | 2013-08-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104421349A true CN104421349A (en) | 2015-03-18 |
| CN104421349B CN104421349B (en) | 2018-04-13 |
Family
ID=51976641
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410321008.8A Active CN104421349B (en) | 2013-08-20 | 2014-07-07 | Friction mechanism and gear motor |
| CN201420372810.5U Withdrawn - After Issue CN203979192U (en) | 2013-08-20 | 2014-07-07 | Friction mechanism and gear motor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420372810.5U Withdrawn - After Issue CN203979192U (en) | 2013-08-20 | 2014-07-07 | Friction mechanism and gear motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6276538B2 (en) |
| CN (2) | CN104421349B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296730A (en) * | 2018-10-18 | 2019-02-01 | 珠海格力电器股份有限公司 | A kind of air conditioner clutch gear, rotating mechanism and air conditioner |
| CN111106715A (en) * | 2018-10-26 | 2020-05-05 | 日本电产三协株式会社 | Overload protection mechanism and gear motor with same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6276538B2 (en) * | 2013-08-20 | 2018-02-07 | 日本電産サンキョー株式会社 | Friction mechanism and geared motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151629A (en) * | 1995-10-06 | 1997-06-11 | 株式会社三协精机制作所 | Friction mechanism and small motor with friction mechanism |
| WO2004008603A2 (en) * | 2002-07-12 | 2004-01-22 | Black & Decker Inc. | Dynamoelectric machine having an encapsulated coil structure |
| CN1598335A (en) * | 2003-09-17 | 2005-03-23 | 本田技研工业株式会社 | Connection structure between a plastic gear and a support shaft |
| CN101685997A (en) * | 2008-09-24 | 2010-03-31 | 日本电产三协株式会社 | Friction mechanism, gear motor, and method for manufacturing the friction mechanism |
| JP2010078009A (en) * | 2008-09-24 | 2010-04-08 | Nidec Sankyo Corp | Friction mechanism, geared motor and method of manufacturing friction mechanism |
| CN102029374A (en) * | 2010-10-08 | 2011-04-27 | 上海光裕汽车空调压缩机有限公司 | Method for casting cylinder body of compressor |
| WO2013084613A1 (en) * | 2011-12-07 | 2013-06-13 | 日本精工株式会社 | Worm wheel and electric power steering device |
| CN203979192U (en) * | 2013-08-20 | 2014-12-03 | 日本电产三协株式会社 | Friction mechanism and gear motor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4702122A (en) * | 1986-09-02 | 1987-10-27 | The Scott & Fetzer Company | Bi-directional advance gear having a torque limiting clutch |
| JP3361230B2 (en) * | 1996-06-19 | 2003-01-07 | 株式会社三協精機製作所 | Small motor with friction mechanism |
| JPH11170310A (en) * | 1997-12-05 | 1999-06-29 | Victor Co Of Japan Ltd | Injection mold |
| JP4030087B2 (en) * | 2001-07-23 | 2008-01-09 | 株式会社エンプラス | Resin multi-stage gear |
| JP2005280105A (en) * | 2004-03-30 | 2005-10-13 | Mitsubishi Materials Corp | Mold assembly |
| JP2005299864A (en) * | 2004-04-15 | 2005-10-27 | Mitsubishi Motors Corp | Parallel-axes type multi-stage transmission |
| JP2010078008A (en) * | 2008-09-24 | 2010-04-08 | Nidec Sankyo Corp | Friction mechanism and geared motor |
| JP5292168B2 (en) * | 2009-04-27 | 2013-09-18 | Ｃｋｄ株式会社 | Cylindrical part manufacturing method and cylindrical part manufacturing mold |
| JP5588926B2 (en) * | 2011-06-01 | 2014-09-10 | 日立オートモティブシステムズ株式会社 | Resin gear, mold, and manufacturing method thereof |
-
2013
- 2013-08-20 JP JP2013170016A patent/JP6276538B2/en active Active
-
2014
- 2014-07-07 CN CN201410321008.8A patent/CN104421349B/en active Active
- 2014-07-07 CN CN201420372810.5U patent/CN203979192U/en not_active Withdrawn - After Issue
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151629A (en) * | 1995-10-06 | 1997-06-11 | 株式会社三协精机制作所 | Friction mechanism and small motor with friction mechanism |
| WO2004008603A2 (en) * | 2002-07-12 | 2004-01-22 | Black & Decker Inc. | Dynamoelectric machine having an encapsulated coil structure |
| CN1598335A (en) * | 2003-09-17 | 2005-03-23 | 本田技研工业株式会社 | Connection structure between a plastic gear and a support shaft |
| CN101685997A (en) * | 2008-09-24 | 2010-03-31 | 日本电产三协株式会社 | Friction mechanism, gear motor, and method for manufacturing the friction mechanism |
| JP2010078009A (en) * | 2008-09-24 | 2010-04-08 | Nidec Sankyo Corp | Friction mechanism, geared motor and method of manufacturing friction mechanism |
| CN102029374A (en) * | 2010-10-08 | 2011-04-27 | 上海光裕汽车空调压缩机有限公司 | Method for casting cylinder body of compressor |
| WO2013084613A1 (en) * | 2011-12-07 | 2013-06-13 | 日本精工株式会社 | Worm wheel and electric power steering device |
| CN203979192U (en) * | 2013-08-20 | 2014-12-03 | 日本电产三协株式会社 | Friction mechanism and gear motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296730A (en) * | 2018-10-18 | 2019-02-01 | 珠海格力电器股份有限公司 | A kind of air conditioner clutch gear, rotating mechanism and air conditioner |
| CN111106715A (en) * | 2018-10-26 | 2020-05-05 | 日本电产三协株式会社 | Overload protection mechanism and gear motor with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104421349B (en) | 2018-04-13 |
| CN203979192U (en) | 2014-12-03 |
| JP2015038373A (en) | 2015-02-26 |
| JP6276538B2 (en) | 2018-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105580248B (en) | Bus unit, the manufacturing method of bus unit and brushless motor | |
| CN204597658U (en) | Motor | |
| CN204334137U (en) | Motor stator | |
| CN203933319U (en) | Motor | |
| JP6189699B2 (en) | Rotor core, rotor, and rotating electric machine | |
| CN101978574A (en) | Motor | |
| CN104421349A (en) | Friction mechanism and gear motor | |
| JP5363255B2 (en) | Stator manufacturing method and stator | |
| JP2014039464A (en) | Core component for motor, and method of improving slot filling rate and material utilization rate of core component for motor | |
| JP2014138444A (en) | Electric motor, pump device using the same, and stator | |
| JP2014135852A (en) | Brushless motor | |
| JP2019205340A (en) | Electric motor and rotor thereof | |
| JP2011030320A (en) | Dynamo-electric machine and method of manufacturing the same | |
| KR101363218B1 (en) | Motor with one-way rotation | |
| CN204205828U (en) | Motor | |
| JP2014050188A (en) | Method of manufacturing stator | |
| JP2012110209A (en) | Commutator, method of manufacturing the commutator and electric motor | |
| JP2011067070A (en) | Motor | |
| CN203481936U (en) | Stator punching sheet, stator core and motor | |
| CN203554186U (en) | Motor | |
| CN208935274U (en) | Compound gear and gear motor | |
| JPH01270757A (en) | Motor | |
| CN205029491U (en) | Enclosed type vibrating motor | |
| CN203607934U (en) | Bread machine motor structure | |
| JP2015023630A (en) | Stator manufacturing method and stator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |