CN215186278U - Gear motor - Google Patents
Gear motor Download PDFInfo
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- CN215186278U CN215186278U CN202120571884.1U CN202120571884U CN215186278U CN 215186278 U CN215186278 U CN 215186278U CN 202120571884 U CN202120571884 U CN 202120571884U CN 215186278 U CN215186278 U CN 215186278U
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- bevel gear
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- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a gear motor. The gear motor has: a 1 st bevel gear rotating about a 1 st axis; a 2 nd bevel gear engaged with the 1 st bevel gear to rotate about the 2 nd axis; a housing supporting the 1 st and 2 nd bevel gears; and a motor body that transmits power to either the 1 st bevel gear or the 2 nd bevel gear. The housing has: a 1 st cylinder portion extending along the 1 st axis and housing the 1 st bevel gear; a 2 nd cylindrical portion extending along the 2 nd axis and accommodating the 2 nd bevel gear; and a corner portion provided at an intersection of the 1 st tube portion and the 2 nd tube portion. The corner portion has a fixing plate portion extending along the 1 st axis and the 2 nd axis. The housing is fixed to an external member at the fixing plate portion.
Description
Technical Field
The utility model relates to a gear motor.
Background
In recent years, with the miniaturization of electronic devices such as smartphones, development of thinner and high-output gear motors has been progressing. For example, patent document 1 discloses a gear box device having a slide mechanism for converting a rotational operation of a motor into a linear operation.
Patent document 1: japanese patent laid-open publication No. 2019-47589
As the power transmission mechanism, a mechanism for changing the direction of the rotation shaft may be used. A bevel gear mechanism is known as a mechanism for changing the direction of a rotating shaft. In the bevel gear mechanism, it is required to improve the positional accuracy of the intersecting shafts. However, in a gear motor arranged in a small-sized precision apparatus, a housing holding each shaft is deformed by a force at the time of driving, and there is a possibility that the transmission efficiency of the power is lowered.
SUMMERY OF THE UTILITY MODEL
One aspect of the present invention has been made in view of the above problems, and an object of the present invention is to provide a gear motor capable of suppressing deformation of a housing of a bevel gear mechanism.
The utility model discloses a mode 1 provides a gear motor, its characterized in that, this gear motor has: a 1 st bevel gear rotating about a 1 st axis; a 2 nd bevel gear engaged with the 1 st bevel gear to rotate about a 2 nd axis; a housing supporting the 1 st and 2 nd bevel gears; and a motor body that transmits power to either the 1 st bevel gear or the 2 nd bevel gear. The housing has: a 1 st cylinder portion extending along the 1 st axis and housing the 1 st bevel gear; a 2 nd cylindrical portion extending along the 2 nd axis and accommodating the 2 nd bevel gear; and a corner portion provided at an intersection of the 1 st tube portion and the 2 nd tube portion. The corner portion has a fixing plate portion extending along the 1 st axis and the 2 nd axis. The housing is fixed to an external member at the fixing plate portion.
The gear motor according to claim 2 is characterized in that, in the gear motor according to claim 1, the corner portion has a 1 st plate portion perpendicular to the 1 st axis, and the 1 st plate portion is provided with a support shaft portion extending along the 1 st axis, and a support hole into which the support shaft portion is inserted is opened in a front end surface of the 1 st bevel gear.
The gear motor according to claim 3 is the gear motor according to claim 1, wherein the corner portion has a 2 nd plate portion perpendicular to the 2 nd axis, and the front end surface of the 2 nd bevel gear has a projection projecting toward the 2 nd plate portion, the projection being hemispherical and projecting about the 2 nd axis and coming into point contact with the 2 nd plate portion.
The present invention provides the gear motor according to claim 4, wherein the gear motor according to any one of the first to third aspects further includes a bearing, and the 2 nd bevel gear includes: a gear body portion; and a shaft portion that extends from the gear body portion along the 2 nd axis and is rotatably supported by the bearing, wherein a bearing holding portion that holds the bearing is provided inside the 2 nd cylindrical portion.
The gear motor according to claim 5 is characterized in that, in the gear motor according to claim 4, the gear motor has a washer disposed between the bearing and the gear main body portion in the axial direction of the 2 nd axis.
A gear motor according to claim 6 is the gear motor according to any one of claims 1 to 3, wherein the housing has a housing main body and a lid portion joined to each other, the 2 nd cylindrical portion is divided into the housing main body and the lid portion at a joint surface along the 2 nd axis, and an end portion of the 2 nd cylindrical portion is fitted into an insertion hole provided in the coupling member.
The gear motor according to claim 7 is characterized in that, in the gear motor according to any one of the aspects 1 to 3, the gear motor has a planetary gear mechanism connected to the 1 st bevel gear, and the motor main body is configured such that the planetary gear mechanism transmits power to the 1 st bevel gear.
According to the utility model discloses, provide the gear motor that can improve the axiality of motor main part and planetary gear mechanism.
Drawings
Fig. 1 is a sectional view of a gear motor according to an embodiment.
Fig. 2 is an exploded perspective view of a transmission mechanism according to an embodiment.
Description of the reference symbols
1: a gear motor; 9: a connecting member; 9 a: an insertion hole; 11: 1 st bevel gear; 11 d: a support hole; 12: a 2 nd bevel gear; 12 a: a 2 nd gear main body portion (gear main body portion); 12 b: a shaft portion; 12 d: a protrusion; 13: a housing; 13A: a housing main body; 13B: a cover portion; 13 p: a bonding surface; 14: a 1 st cylinder part; 15: a 2 nd cylindrical part; 15 d: a bearing holding portion; 17: a corner portion; 17 a: a 1 st plate portion; 17 b: a 2 nd plate portion; 17 c: a fixed plate portion; 17 p: a support shaft portion; 18: a gasket; 19: a bearing; 20: a motor main body; 30: a planetary gear mechanism; 36: a barrel portion; j1: 1 st axis; j2: axis 2.
Detailed Description
Hereinafter, a gear motor according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention.
In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system.
The 1 st axis J1 described later extends in the Y-axis direction, and the 2 nd axis J2 extends in the X-axis direction. In the following description, the X-axis direction is taken as the vertical direction, the + Z side is taken as the upper side, and the-Y side is taken as the lower side. One axial side of the 1 st axis J1 is the + Y side, and the other axial side is the-Y side. One axial side of the 2 nd axis J2 is the + X side, and the other axial side is the-X side.
The vertical direction in this specification is a direction set for convenience of explanation, and is not limited to the posture when the geared motor 1 is used.
Fig. 1 is a sectional view of the gear motor 1. The gear motor 1 of the present embodiment is mounted on an electronic device such as a smartphone, for example. The gear motor 1 has a motor main body 20, a planetary gear mechanism 30, and a bevel gear mechanism 10.
< Motor body >
The motor main body 20 is a PM type stepping motor (Permanent Magnet stepping motor). The motor body 20 extends along the 1 st axis J1. The motor main body 20 has a cylindrical shape as a whole with the 1 st axis J1 as a center.
The motor main body 20 includes: a rotor 21 rotating about a 1 st axis J1; a stator 22 surrounding the rotor 21 from the radially outer side with an air gap therebetween; a motor case 27 that houses the rotor 21 and the stator 22; the 1 st sliding bearing 41; and a 2 nd slide bearing 42.
The stator 22 has a plurality of terminal pins 25 p. The terminal pin 25p protrudes radially outward from the notch of the motor case 27. The terminal pin 25p is connected to a substrate not shown. Power is supplied from the substrate to the stator 22 via the terminal pin 25 p.
The rotor 21 includes a shaft 29 extending along the 1 st axis J1 and a cylindrical rotor magnet 28. The rotor magnet 28 is fixed to the shaft 29 by an adhesive.
The motor housing 27 has a cylindrical portion 27c surrounding the rotor 21 and the stator 22 from the radial outside, a 1 st bottom plate portion 27a located at an opening on the + Y side of the cylindrical portion 27c, and a 2 nd bottom plate portion 27b located at an opening on the-Y side of the cylindrical portion 27 c. The stator 22 is fixed to the motor case 27. The 1 st bottom plate portion 27a and the 2 nd bottom plate portion 27b are joined to the cylindrical portion 27c by, for example, welding.
The 1 st and 2 nd bottom plate portions 27a and 27b are plate-shaped along a plane perpendicular to the 1 st axis J1. The 1 st and 2 nd bottom plate portions 27a, 27b are circular when viewed in the axial direction of the 1 st axis J1.
The 1 st sliding bearing 41 and the 2 nd sliding bearing 42 rotatably support the shaft 29. The 1 st sliding bearing 41 is held by the 1 st bottom plate portion 27 a. The 2 nd sliding bearing 42 is held by the 2 nd bottom plate portion 27 b.
< planetary gear mechanism >
The planetary gear mechanism 30 is located on one axial side of the 1 st axis J1 with respect to the motor main body 20. The planetary gear mechanism 30 is connected to the + Y-side end of the shaft 29, and the planetary gear mechanism 30 is connected to the rotor 21 of the motor main body 20. The planetary gear mechanism 30 decelerates the power output from the motor main body 20.
The planetary gear mechanism 30 has a gear housing (casing) 35, a 1 st sun gear 33a, 31 st planetary gears 33b, a 1 st carrier 31, 32 nd planetary gears 34b, and a 2 nd carrier 32.
The gear housing 35 has a cylindrical shape centered on the 1 st axis J1. The gear housing 35 surrounds the plurality of planetary gears (the 1 st planetary gear 33b and the 2 nd planetary gear 34b) from the radially outer side of the 1 st axis J1. The gear housing 35 has a cylindrical portion 36 and a housing bottom portion 37 located at an opening on the + Y side of the cylindrical portion 36. An internal gear 36a is provided on the inner circumferential surface of the cylindrical portion 36. The internal gear 36a meshes with the 1 st planetary gear 33b and the 2 nd planetary gear 34 b.
the-Y-side end of the gear housing 35 is engaged with the motor housing 27. More specifically, the-Y-side end of the gear housing 35 is joined to the 1 st bottom plate portion 27a by welding. Thereby, the planetary gear mechanism 30 is fixed to the motor main body 20.
A bearing hole 37a penetrating along the 1 st axis J1 is provided in the center of the case bottom 37. A main shaft 32c of the 2 nd carrier 32 described later is inserted into the bearing hole 37 a. The bearing hole 37a rotatably supports the main shaft 32 c. A fitting portion 37b is provided on the outer side surface of the case bottom 37. The fitting portion 37b is circular when viewed in the axial direction of the 1 st axis J1. The fitting portion 37b is fitted into the bevel gear mechanism 10 and fixed to the bevel gear mechanism 10.
The 1 st sun gear 33a is fixed to the shaft 29 and rotates together with the shaft 29 about the 1 st axis J1. The 31 st planetary gears 33b are arranged at equal intervals in the circumferential direction of the 1 st axis J1. The 31 st planetary gears 33b are meshed with the 1 st sun gear 33 a. The 31 st planetary gears 33b revolve in the circumferential direction of the 1 st axis J1 with the rotation of the 1 st sun gear 33 a. A holding hole 33ba is provided in the center of the 1 st planetary gear 33 b. A slide washer 49 is disposed on the-Y side of the 1 st planetary gear 33 b.
The 1 st carrier 31 has a 1 st disc portion 31b, 31 st counter shafts 31a, and a 2 nd sun gear 31 c. The 1 st disc portion 31b extends in the radial direction about the 1 st axis J1. The 31 st auxiliary shafts 31a extend from the 1 st disc portion 31b to the-Y side. The 2 nd sun gear 31c extends from the 1 st disc portion 31b to the + Y side about the 1 st axis J1.
The 31 st counter shafts 31a are inserted into the holding holes 33ba of the 1 st planetary gear 33b, respectively. The 1 st counter shaft 31a supports the 1 st planetary gear 33b so as to be rotatable on its own axis. The 1 st carrier 31 rotates about the 1 st axis J1 in accordance with the revolving rotation of the 31 st planetary gears 33b about the 1 st axis J1. That is, the 1 st carrier 31 supports the 1 st planetary gears 33b to be revolvable around the 1 st axis J1.
The 2 nd sun gear 31c is a part of the 1 st carrier 31, and therefore rotates about the 1 st axis J1 with the revolving rotation of the 1 st planetary gear 33 b.
The 32 nd planetary gears 34b are arranged at equal intervals in the circumferential direction of the 1 st axis J1. The 3 nd 2 nd planetary gears 34b are meshed with the 2 nd sun gear 31 c. The 32 nd planetary gears 34b revolve in the circumferential direction of the 1 st axis J1 with the rotation of the 2 nd sun gear 31 c. A holding hole 34ba is provided in the center of the 2 nd planetary gear 34 b.
The 2 nd carrier 32 has a 2 nd disc portion 32b, 32 nd sub shafts 32a, and a main shaft 32 c. The 2 nd disc portion 32b extends in the radial direction centering on the 1 st axis J1. The 32 nd auxiliary shafts 32a extend from the 2 nd disk portion 32b to the-Y side. The main shaft 32c extends from the 2 nd disc portion 32b to the + Y side around the 1 st axis J1.
The 32 nd counter shafts 32a are inserted into the holding holes 34ba of the 2 nd planetary gear 34b, respectively. The 2 nd counter shaft 32a supports the 2 nd planetary gear 34b so as to be rotatable on its axis. The 2 nd carrier 32 rotates about the 1 st axis J1 as the 3 nd 2 nd planetary gears 34b revolve around the 1 st axis J1. That is, the 2 nd carrier 32 supports the plurality of 2 nd planetary gears 34b so as to be revolvably rotatable about the 1 st axis J1.
The main shaft 32c has a cylindrical shape centered on the 1 st axis J1. The main shaft 32c is rotatably supported by a bearing hole 37a of the gear housing 35. An H-cut surface is provided at the + Y-side tip of the main shaft 32 c. The bevel gear mechanism 10 is connected to the main shaft 32 c.
< bevel gear mechanism >
Fig. 2 is an exploded perspective view of the bevel gear mechanism 10.
The bevel gear mechanism 10 includes a 1 st bevel gear 11 rotating about a 1 st axis J1, a 2 nd bevel gear 12 meshing with the 1 st bevel gear 11 and rotating about a 2 nd axis J2, a washer 18, a bearing 19, and a housing 13 housing them. That is, the gear motor 1 includes a 1 st bevel gear 11, a 2 nd bevel gear 12, a washer 18, a bearing 19, and a housing 13. The 1 st axis J1 and the 2 nd axis J2 are perpendicular to each other. In addition, the 1 st axis J1 and the 2 nd axis J2 intersect each other. The bevel gear mechanism 10 converts the rotational axis of the power of the motor main body 20 input to the 1 st bevel gear 11 by 90 °, and outputs the converted power from the shaft portion 12b of the 2 nd bevel gear 12.
(1 st bevel gear)
The 1 st bevel gear 11 has a 1 st gear body portion 11a and a base portion 11 b.
The 1 st gear main body portion 11a has a conical shape whose diameter increases from the + Y side toward the-Y side (i.e., from one side to the other side in the axial direction of the 1 st axis J1), and is provided with a tooth surface on the outer peripheral surface thereof.
A 1 st leading end surface 11c facing the + Y side is provided at the leading end of the 1 st gear body portion 11 a. The 1 st leading end surface 11c is a flat surface perpendicular to the 1 st axis J1. The 1 st front end surface 11c is opened with a support hole 11 d. The support hole 11d extends in the axial direction of the 1 st axis J1. The support hole 11d is circular with the 1 st axis J1 as the center.
(2 nd bevel gear)
The 2 nd bevel gear 12 has a 2 nd gear body portion (gear body portion) 12a and a shaft portion 12 b.
The 2 nd gear main body portion 12a has a conical shape whose diameter increases from the + X side toward the-X side (i.e., from one side to the other side in the axial direction of the 2 nd axis J2), and is provided with a tooth surface on the outer peripheral surface thereof.
A 2 nd leading end surface 12c facing the + X side is provided at the leading end of the 2 nd gear body 12 a. The 2 nd leading end surface 12c is provided with a projection 12 d. The protrusion 12d protrudes in a hemispherical shape about the 2 nd axis J2.
A base end surface 12e perpendicular to the 2 nd axis J2 is provided on the base end side (-X side) of the 2 nd gear main body portion 12 a. The base end surface 12e is provided with a sliding surface 12f projecting annularly about the 2 nd axis J2.
The shaft portion 12b is located on the-X side of the 2 nd gear body portion 12 a. The shaft portion 12b extends from the base end surface 12e of the 2 nd gear main body portion 12a along the 2 nd axis J2. The end of the shaft portion 12b on the-X side of the 2 nd axis J2 is connected to an output target (not shown) of the gear motor 1.
(Bearings)
The bearing 19 is a cylindrical sliding bearing centered on the 2 nd axis J2. The bearing 19 is manufactured by, for example, sintering or the like. The bearing 19 rotatably supports the shaft portion 12b of the 2 nd bevel gear 12. Thereby, the bearing 19 smoothly rotates the 2 nd bevel gear 12 about the 2 nd axis J2.
(gasket)
The washer 18 has an annular shape centered on the 2 nd axis J2. The washer 18 is disposed between the bearing 19 and the sliding surface 12f of the 2 nd gear main body portion 12a in the axial direction of the 2 nd axis J2. When the 1 st bevel gear 11 and the 2 nd bevel gear 12 transmit power to each other, the 2 nd bevel gear 12 receives a force toward the-X side from the 1 st bevel gear 11. Therefore, during driving, the contact pressure between the 2 nd gear main body portion 12a and the bearing 19 is likely to increase, and the sliding resistance is likely to increase. According to the present embodiment, the sliding resistance of the 2 nd bevel gear 12 can be reduced by interposing the washer 18 between the 2 nd gear body 12a and the bearing 19.
(case)
The housing 13 has a 1 st tube portion 14 extending along the 1 st axis J1, a 2 nd tube portion 15 extending along the 2 nd axis J2, and a corner portion 17 provided at an intersection of the 1 st tube portion 14 and the 2 nd tube portion 15. The 1 st tubular portion 14 and the 2 nd tubular portion 15 are connected in an L-shape when viewed in the vertical direction.
The 1 st tube portion 14 is cylindrical with the 1 st axis J1 as the center. The 1 st cylinder portion 14 houses the 1 st bevel gear 11. The 1 st tube portion 14 has a 1 st opening 14a that opens on the-Y side of the 1 st axis J1. The 1 st opening 14a is closed by the planetary gear mechanism 30. The fitting portion 37b is fitted in the 1 st opening 14 a. The outer peripheral edge of the 1 st opening 14a is joined at a joint 8 provided at a boundary with the gear housing 35 of the planetary gear mechanism 30.
The 2 nd cylindrical portion 15 has a cylindrical shape centered on the 2 nd axis J2. The 2 nd cylindrical portion 15 houses the 2 nd bevel gear 12. The inner space of the 2 nd cylindrical portion 15 is connected to the inner space of the 1 st cylindrical portion 14. That is, the internal space of the 1 st tubular portion 14 and the internal space of the 2 nd tubular portion 15 communicate with each other. The 1 st bevel gear 11 and the 2 nd bevel gear 12 are engaged with each other in a boundary area of the internal space of the 1 st cylindrical portion 14 and the internal space of the 2 nd cylindrical portion 15.
A bottom part 15a is provided at the-X side end of the 2 nd cylindrical part 15. The bottom portion 15a has a plate shape perpendicular to the 2 nd axis J2. The bottom portion 15a is provided with a center hole 15b penetrating in the axial direction of the 2 nd axis J2. The shaft portion 12b of the 2 nd bevel gear 12 is inserted through the center hole 15 b. The bottom portion 15a is provided with a surrounding cylinder portion 15c that protrudes from the edge of the center hole 15b toward the-X side. The surrounding cylindrical portion 15c surrounds the shaft portion 12b of the 2 nd bevel gear 12 from the radially outer side of the 2 nd axis J2.
A bearing holding portion 15d for holding the bearing 19 is provided inside the 2 nd cylindrical portion 15. The bearing holding portion 15d has an inner side surface 15db and a bearing surface 15 da.
The inner surface 15db is a part of the inner surface of the 2 nd cylindrical portion 15, and faces radially inward of the 2 nd axis J2. The inner side surface 15db surrounds the outer peripheral surface of the bearing 19. The inner side surface 15db is in contact with the outer peripheral surface of the bearing 19.
The bearing surface 15da is connected to the-X-side end of the inner side surface 15 db. The support surface 15da is a surface of the bottom portion 15a facing the + X side. The bearing surface 15da is in contact with the surface of the bearing 19 facing the-X side. The bearing surface 15da receives a force toward the-X side received by the 2 nd bevel gear 12 from the 1 st bevel gear 11 at the time of driving.
The corner 17 includes a 1 st plate 17a, a 2 nd plate 17b, and a fixing plate 17 c. The 1 st plate portion 17a, the 2 nd plate portion 17b, and the fixing plate portion 17c are connected perpendicularly to each other. Therefore, the 1 st plate portion 17a, the 2 nd plate portion 17b, and the fixing plate portion 17c reinforce each other. That is, the 1 st plate portion 17a is reinforced by the 2 nd plate portion 17b and the fixing plate portion 17c, the 2 nd plate portion 17b is reinforced by the 1 st plate portion 17a and the fixing plate portion 17c, and the fixing plate portion 17c is reinforced by the 1 st plate portion 17a and the 2 nd plate portion 17 b.
The fixed plate portion 17c is plate-shaped extending along the 1 st axis J1 and the 2 nd axis J2. The fixing plate portion 17c extends parallel to the X-Y plane. The fixing plate portion 17c is provided with a fixing hole 17d penetrating in the plate thickness direction. A fixing screw (not shown) for fixing the geared motor 1 to an external member (not shown) is inserted into the fixing hole 17 d. That is, the housing 13 is fixed to the external member at the fixing plate portion 17 c.
According to the present embodiment, the housing 13 has a fixing plate portion 17c for fixing to an external member, and supports the 1 st bevel gear 11 and the 2 nd bevel gear 12 for transmitting power to an output target (not shown). Therefore, the positional accuracy of the output portion (the shaft portion 12b of the 2 nd bevel gear 12 in the present embodiment) with respect to the external member can be easily improved, and the power of the motor main body 20 can be efficiently transmitted to the output target.
According to the present embodiment, the fixing plate portion 17c is provided at the corner portion 17 of the 1 st tube portion 14 and the 2 nd tube portion 15. During power transmission of the bevel gear mechanism 10, a force along the 1 st axis J1 and the 2 nd axis J2 is applied to the housing 13 from the 1 st bevel gear 11 and the 2 nd bevel gear 12, respectively. Therefore, by fixing the housing 13 to the external member at the fixing plate portion 17c provided at the corner portion 17, the force applied to the housing 13 can be effectively received. Further, by fixing the housing 13 with a portion that receives a force, the rigidity of the housing 13 can be increased, and deformation of the housing 13 can be suppressed. By suppressing the deformation of the housing 13 during driving, the relative positional accuracy of the 1 st bevel gear 11 and the 2 nd bevel gear 12 held by the housing 13 can be improved. As a result, the power transmission efficiency of the bevel gear mechanism 10 can be improved.
The 1 st plate portion 17a is perpendicular to the 1 st axis J1. The 1 st plate portion 17a has a 1 st facing surface 17aa facing the 1 st bevel gear 11 in the axial direction of the 1 st axis J1. That is, the 1 st facing surface 17aa faces the-Y side. The 1 st facing surface 17aa is provided with a support shaft portion 17p projecting to the-Y side. The support shaft portion 17p has a cylindrical shape centered on the 1 st axis J1. That is, the support shaft portion 17p extending along the 1 st axis J1 is provided in the 1 st plate portion 17 a.
The support shaft portion 17p is inserted into a support hole 11d opened in the 1 st front end surface 11c of the 1 st bevel gear 11. The support shaft portion 17p supports the 1 st bevel gear 11 to be rotatable about the 1 st axis J1.
According to the present embodiment, a support shaft portion 17p that supports the 1 st bevel gear 11 is provided at the corner portion 17 of the housing 13. As described above, the housing 13 is fixed to the fixing plate portion 17c provided at the corner portion 17. Since the deformation of the corner portion 17 of the housing 13 is suppressed, the support shaft portion 17p that rotatably supports the 1 st bevel gear 11 is provided in the corner portion 17, whereby the positional accuracy of the 1 st bevel gear 11 during driving can be improved.
The 2 nd plate portion 17b is perpendicular to the 2 nd axis J2. The 2 nd plate portion 17b has a 2 nd opposing surface 17ba opposing the 2 nd bevel gear 12 in the axial direction of the 2 nd axis J2. That is, the 2 nd opposed surface 17ba faces the-X side. The 2 nd opposing surface 17ba is a flat surface perpendicular to the 2 nd axis J2. The projection 12d provided on the 2 nd leading end surface 12c of the 2 nd bevel gear 12 is in point contact with the 2 nd opposed surface 17 ba. That is, the projection 12d is in point contact with the 2 nd plate portion 17 b. The contact point of the 2 nd opposed surface 17ba with the projection 12d is located on the 2 nd axis J2.
As described above, the deformation of the corner 17 of the housing 13 is suppressed. According to the present embodiment, by the point contact of the 2 nd opposed surface 17ba provided at the corner portion 17 with the projection 12d of the 2 nd bevel gear 12, wobbling of the 2 nd bevel gear 12 along the 2 nd axis J2 is suppressed, and eccentric rotation of the 2 nd bevel gear 12 is suppressed.
Further, a washer 18 is disposed between the bearing 19 and the 2 nd gear main body portion 12a in the axial direction of the 2 nd axis J2. Therefore, the position of the 2 nd bevel gear 12 along the 2 nd axis J2 can be finely adjusted by changing the thickness or the number of washers 18. This stabilizes the meshing ratio between the 1 st bevel gear 11 and the 2 nd bevel gear 12. Further, the size of the gap between the projection 12d of the 2 nd bevel gear 12 and the 2 nd plate 17b can be kept constant, and the rotational efficiency and the axial play of the 2 nd bevel gear 12 can be stabilized.
As shown in fig. 2, the housing 13 includes a housing main body 13A and a lid 13B that are separable in the vertical direction (Z-axis direction). The case main body 13A and the lid portion 13B of the case 13 are joined to each other at a joint surface 13p along a plane (X-Y plane) perpendicular to the up-down direction. The case body 13A and the lid 13B are joined by, for example, welding.
In the present embodiment, the joint surface 13p is a plane through which the 1 st axis J1 and the 2 nd axis J2 pass. The 1 st tubular portion 14 and the 2 nd tubular portion 15 are vertically separated at the joint surface 13 p. That is, the housing main body 13A and the lid 13B have a part of the 1 st tube portion 14 and a part of the 2 nd tube portion 15, respectively. On the other hand, the corner 17 is not separated by the case main body 13A and the lid 13B. The case main body 13A has the entire corner portion 17.
According to the present embodiment, since the corner portion 17 is formed of a single member, the rigidity of the corner portion 17 can be improved. This enables the case 13 to be stably fixed to the external member at the corner 17, the 1 st bevel gear 11 to be supported, and the 2 nd bevel gear 12 to be positioned.
According to the present embodiment, the 1 st tube part 14 is divided into the case main body 13A and the lid part 13B at the joint surface 13p along the 1 st axis J1. The 1 st cylindrical portion 14 is joined to a joint portion 8 welded or the like to a gear housing 35 of the planetary gear mechanism 30. This prevents the 1 st tube portion 14 from being divided along the joint surface 13p, and the strength of the 1 st tube portion 14 is increased.
According to the present embodiment, the 2 nd cylindrical portion 15 is divided into the case main body 13A and the lid portion 13B at the joint surface 13p along the 2 nd axis J2. An end portion (i.e., a bottom portion 15a) of the 2 nd cylindrical portion 15 is fitted into an insertion hole 9a, and the insertion hole 9a is provided to the coupling member 9. The inner side surface of the insertion hole 9a surrounds the surrounding cylindrical portion 15c provided at the bottom portion 15a of the 2 nd cylindrical portion 15 from the radially outer side of the 2 nd axis J2. The connecting member 9 prevents the 2 nd cylindrical portion 15 from being divided along the joint surface 13 p. This improves the strength of the 2 nd cylindrical portion 15.
According to the present embodiment, the gear motor 1 includes the planetary gear mechanism 30 connected to the 1 st bevel gear 11, and the motor main body 20 transmits power to the 1 st bevel gear 11 via the planetary gear mechanism 30. This makes it possible to provide the gear motor 1 in which the reduction mechanism and the mechanism for changing the direction of the rotation shaft are integrated. Further, a torque limiter may be further disposed between the planetary gear mechanism 30 and the bevel gear mechanism 10.
While the embodiments and the modifications of the present invention have been described above, the configurations and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications of the configurations can be made without departing from the scope of the present invention. The present invention is not limited to the embodiments.
For example, in the present embodiment, the planetary gear mechanism 30 is provided with the 1 st bevel gear 11 on the input side and the 2 nd bevel gear 12 on the output side, but the relationship may be reversed. That is, the motor may transmit power to either the 1 st bevel gear 11 or the 2 nd bevel gear 12.
Claims (7)
1. A gear motor is characterized in that the gear motor is provided with a gear motor,
the gear motor has:
a 1 st bevel gear rotating about a 1 st axis;
a 2 nd bevel gear engaged with the 1 st bevel gear to rotate about a 2 nd axis;
a housing supporting the 1 st and 2 nd bevel gears; and
a motor main body for transmitting power to either the 1 st bevel gear or the 2 nd bevel gear,
the housing has:
a 1 st cylinder portion extending along the 1 st axis and housing the 1 st bevel gear;
a 2 nd cylindrical portion extending along the 2 nd axis and accommodating the 2 nd bevel gear; and
a corner portion provided at an intersection of the 1 st tubular portion and the 2 nd tubular portion,
the corner portion has a fixing plate portion extending along the 1 st axis and the 2 nd axis,
the housing is fixed to an external member at the fixing plate portion.
2. The gear motor of claim 1,
the corner has a 1 st plate portion perpendicular to the 1 st axis,
a support shaft portion extending along the 1 st axis is provided on the 1 st plate portion,
a support hole into which the support shaft portion is inserted is opened in a front end surface of the 1 st bevel gear.
3. The gear motor of claim 1,
the corner has a 2 nd plate portion perpendicular to the 2 nd axis,
a projection projecting toward the 2 nd plate portion is provided on a front end surface of the 2 nd bevel gear,
the protrusion protrudes in a hemispherical shape with the 2 nd axis as a center and is in point contact with the 2 nd plate portion.
4. The gear motor according to any one of claims 1 to 3,
the gear motor is also provided with a bearing,
the 2 nd bevel gear has:
a gear body portion; and
a shaft portion that extends from the gear main body portion along the 2 nd axis and is rotatably supported by the bearing,
a bearing holding portion for holding the bearing is provided inside the 2 nd cylindrical portion.
5. The gear motor of claim 4,
the gear motor includes a washer disposed between the bearing and the gear main body in the 2 nd axis direction.
6. The gear motor according to any one of claims 1 to 3,
the housing has a housing main body and a cover portion engaged with each other,
the 2 nd cylindrical part is divided into the case main body and the lid part at a joint surface along the 2 nd axis,
an end of the 2 nd cylindrical portion is fitted into an insertion hole provided in the coupling member.
7. The gear motor according to any one of claims 1 to 3,
the gear motor has a planetary gear mechanism connected to the 1 st bevel gear,
the motor main body transmits power to the 1 st bevel gear via the planetary gear mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-051230 | 2020-03-23 | ||
| JP2020051230A JP2021148274A (en) | 2020-03-23 | 2020-03-23 | Geared motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215186278U true CN215186278U (en) | 2021-12-14 |
Family
ID=77848168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120571884.1U Expired - Fee Related CN215186278U (en) | 2020-03-23 | 2021-03-19 | Gear motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2021148274A (en) |
| CN (1) | CN215186278U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021079146A (en) * | 2021-02-22 | 2021-05-27 | 株式会社三洋物産 | Game machine |
| JP7315071B2 (en) * | 2021-03-03 | 2023-07-26 | 株式会社三洋物産 | game machine |
-
2020
- 2020-03-23 JP JP2020051230A patent/JP2021148274A/en active Pending
-
2021
- 2021-03-19 CN CN202120571884.1U patent/CN215186278U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021148274A (en) | 2021-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |