CN212935704U - Gear drive motor - Google Patents
Gear drive motor Download PDFInfo
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- CN212935704U CN212935704U CN202021537087.3U CN202021537087U CN212935704U CN 212935704 U CN212935704 U CN 212935704U CN 202021537087 U CN202021537087 U CN 202021537087U CN 212935704 U CN212935704 U CN 212935704U
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Abstract
The utility model provides a gear drive motor, a mode of this gear drive motor has: a drive unit having a motor section and a drive shaft; a slide mechanism having a lead screw and a slide nut inserted by the lead screw; a gear train which transmits power from the drive shaft to the lead screw; and a frame supporting the driving unit, the sliding mechanism, and the gear train. The frame has a first support part (1) for rotatably supporting the drive shaft and one axial end of the screw shaft. The gear train has: a drive gear fixed to the drive shaft; a pinion gear fixed to the lead screw; and an intermediate gear that meshes with the drive gear and the pinion gear. An intermediate shaft centered on an intermediate axis parallel to the motor axis is provided on a surface of the 1 st support portion facing one axial side. The intermediate gear is rotatably supported on the intermediate shaft.
Description
Technical Field
The utility model relates to a gear drive motor.
Background
In recent years, with the miniaturization of electronic devices such as smart phones, development of thinner and high-output geared motors has been advanced. For example, patent document 1 discloses a gear box device for a mobile electronic device having a slide mechanism.
Patent document 1: japanese patent laid-open publication No. 2019-47589
With the progress of higher output of the geared motor, it is required to further improve the power transmission efficiency of each gear mounted on the geared motor.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is an object of the present invention to provide a gear transmission motor that improves the transmission efficiency of gears.
The utility model discloses a gear drive motor's a mode has: a drive unit having a motor portion extending along a motor axis and a drive shaft rotating around the motor axis on one side in an axial direction of the motor portion; a slide mechanism having a lead screw rotatable about a slide axis parallel to the motor axis and a slide nut inserted by the lead screw; a gear train that transmits power from the drive shaft to the lead screw; and a frame supporting the driving unit, the sliding mechanism, and the gear train. The frame has a first support portion 1 that rotatably supports one axial end portion of the drive shaft and the lead screw. The gear train has: a drive gear fixed to the drive shaft extending to one side in an axial direction with respect to the 1 st support portion; a pinion gear fixed to the screw shaft extending to one side in an axial direction with respect to the 1 st support portion; and an intermediate gear that meshes with the drive gear and the pinion gear. An intermediate shaft centered on an intermediate axis parallel to the motor axis is provided on a surface of the 1 st support portion facing one axial side. The intermediate gear is rotatably supported on the intermediate shaft.
In the above-described gear motor, the gear motor has a cover member that covers the gear train from one axial side, and a holding hole into which the drive shaft, the intermediate shaft, and the leading end of the lead screw on one axial side are inserted is provided in a surface of the cover member facing the other axial side.
In the above-described gear motor, the motor unit includes a plurality of motors stacked in the axial direction, and rotors of the plurality of motors are interconnected in the axial direction to constitute a coupled rotor.
In the gear motor according to the above aspect, the drive unit includes a planetary gear mechanism connected to the motor portion, and the drive shaft extends from the planetary gear mechanism to one axial side.
In the gear motor according to the above aspect, the drive gear, the intermediate gear, and the sub-gear are linearly arranged when viewed from the axial direction.
In the above-described gear transmission motor, the frame includes: a 2 nd support portion that rotatably supports an end portion on the other axial side of the lead screw; and a 1 st beam portion extending in the axial direction between the drive unit and the slide mechanism, and connecting the 1 st support portion and the 2 nd support portion.
In the gear motor according to the above aspect, the intermediate shaft and the 1 st beam portion are arranged coaxially.
In the geared motor according to the above aspect, the frame includes a 2 nd beam portion connecting the 1 st support portion and the 2 nd support portion, and the slide mechanism is disposed between the 1 st beam portion and the 2 nd beam portion.
In the above-described gear motor, the frame has a plurality of fixing portions that are plate-shaped and extend in the axial direction and are provided with fixing holes that penetrate in the plate thickness direction, the slide mechanism has a guide shaft that is supported by the frame and extends parallel to the lead screw, two of the fixing portions are disposed on both sides of the guide shaft in the axial direction when viewed in the plate thickness direction of the fixing portions, and each of the fixing holes is located on an extension line of the guide shaft.
According to the utility model discloses a mode provides the gear drive motor who has improved the transmission efficiency of gear.
Drawings
Fig. 1 is an exploded perspective view of a gear motor according to an embodiment, with a part of the gear motor exploded.
FIG. 2 is a cross-sectional view of one embodiment of a geared motor.
Fig. 3 is a front view of a gear motor according to a modification.
Description of the reference symbols
1: a geared motor; 2: a drive unit; 4: a gear train; 5: a sliding mechanism; 10: a frame; 11: 1 st support part; 11 a: an intermediate shaft; 12: a 2 nd support part; 13: a fixed part; 13 p: a fixing hole; 15: a first beam section; 16: a 2 nd beam section; 19: a cover member; 19p, 19q, 19 r: a retaining hole; 20: a motor section; 21: a motor; 21 a: a rotor; 30: a drive shaft; 32: a planetary gear mechanism; 41: a drive gear; 42: an intermediate gear; 43: a pinion gear; 51: a lead screw; 52: a guide shaft; 53: a sliding nut; j1: a motor axis; j2: a medial axis; j3: a sliding axis.
Detailed Description
Hereinafter, a gear transmission 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 rectangular coordinate system. In the following description, unless otherwise specified, the direction (Z-axis direction) parallel to the motor axis J1 is simply referred to as "axial direction", the-Z side is simply referred to as "one axial side", and the + Z side is simply referred to as "the other axial side".
Fig. 1 is an exploded perspective view of a gear motor 1 with a part exploded. Fig. 2 is a sectional view of the geared motor 1. The geared motor 1 of the present embodiment is mounted on a thin electronic device in which the dimension in the Y axis direction is suppressed. As shown in fig. 2, the geared motor 1 has a drive unit 2, a slide mechanism 5, a gear train 4, a frame 10, and a cover member 19.
The gear train 4 has a drive gear 41, an intermediate gear 42, and a pinion gear 43. The drive unit 2 and the drive gear 41 are arranged along a motor axis J1. The intermediate gear 42 is disposed along an intermediate axis J2. The slide mechanism 5 and the pinion 43 are arranged along the slide axis J3.
The motor axis J1, the intermediate axis J2, and the slide axis J3 extend parallel to each other in the Z-axis direction. That is, the intermediate axis J2 and the slide axis J3 are parallel to the motor axis J1. The motor axis J1, the intermediate axis J2, and the slide axis J3 are linearly arranged in the X-axis direction when viewed from the axial direction.
Hereinafter, each part of the geared motor 1 will be described in detail.
< drive Unit >
The drive unit 2 has a motor section 20, a planetary gear mechanism 32, and a drive shaft 30.
The motor portion 20 extends along a motor axis J1. The motor unit 20 includes a plurality of (two in the present embodiment) motors 21 stacked in the axial direction. In the present embodiment, the motor 21 is a stepping motor. The motor 21 has a rotor 21a that rotates about a motor axis J1, and a stator 21b that surrounds the rotor 21a from radially outside of the motor axis J1.
The rotors 21a of the plurality of motors 21 are axially connected to each other to constitute a single coupling rotor 21 c. The coupling rotor 21c has a motor shaft 21d extending in the axial direction about a motor axis J1. On the other hand, the stators 21b of the plurality of motors 21 are stacked in the axial direction and are joined to each other by a joining method such as welding.
According to the present embodiment, since the motor unit 20 includes the plurality of motors 21 stacked in the axial direction, the power of the plurality of motors 21 can be collectively output from the coupling rotor 21 c. Further, since the plurality of motors 21 are arranged in the axial direction, the output of the motor unit 20 can be increased, and the size of the motor unit 20 in the radial direction of the motor axis J1 can be suppressed, so that the electronic device in which the geared motor 1 is mounted can be thinned.
The planetary gear mechanism 32 is connected to the motor unit 20. The planetary gear mechanism 32 decelerates the power output from the motor section 20.
The planetary gear mechanism 32 has a 1 st sun gear 33a, 3 1 st planet gears 33b, a 1 st carrier 33c, a 2 nd sun gear 34a, 32 nd planet gears 34b, a 2 nd carrier 34c, and an internal gear 35.
The ring gear 35 is cylindrical and extends in the axial direction about the motor axis J1. The ring gear 35 meshes with the 1 st planetary gear 33b and the 2 nd planetary gear 34b among gears provided on the inner peripheral surface. The internal gear 35 is fixed to the frame 10 so as not to rotate.
The 1 st sun gear 33a is fixed to the motor shaft 21 d. The 1 st sun gear 33a rotates about the motor axis J1 together with the motor shaft 21 d.
The 3 1 st planetary gears 33b are arranged at equal intervals in the circumferential direction of the motor axis J1. The 3 1 st planetary gears 33b are meshed with the 1 st sun gear 33 a. The 3 1 st planetary gears 33b revolve in the circumferential direction of the motor axis J1 in accordance with the rotation of the 1 st sun gear 33 a.
The 1 st carrier 33c has a disk portion, 3 sub-shafts extending from the disk portion to one side in the axial direction and rotatably supporting the 1 st planetary gear 33b, and a main shaft extending from the disk portion to the other side in the axial direction. The 1 st carrier 33c rotates about the motor axis J1 as the 3 1 st planetary gears 33b revolve around the motor axis J1.
The 2 nd sun gear 34a is provided on the outer peripheral surface of the main shaft of the 1 st carrier 33 c. The 2 nd sun gear 34a rotates together with the 1 st carrier 33c about the motor axis J1.
The 3 nd planetary gears 34b are arranged at equal intervals in the circumferential direction of the motor axis J1. The 3 nd 2 nd planetary gears 34b are meshed with the 2 nd sun gear 34 a. The 32 nd planetary gears 34b revolve in the circumferential direction of the motor axis J1 with the rotation of the 2 nd sun gear 34 a.
The 2 nd carrier 34c includes a disk portion, 3 sub-shafts extending from the disk portion to one side in the axial direction and rotatably supporting the 2 nd planetary gear 34b, and a main shaft extending from the disk portion to the other side in the axial direction. The 2 nd carrier 34c rotates about the motor axis J1 as the 3 nd 2 nd planetary gears 34b revolve around the motor axis J1. The main shaft of the 2 nd carrier 34c is rotatably supported by a slide bearing 35a mounted on the other axial end of the internal gear 35. A retaining hole 34d is provided in the other axial end surface of the 2 nd carrier 34 c.
The drive shaft 30 is inserted into the holding hole 34 d. The drive shaft 30 extends from the planetary gear mechanism 32 to one axial side. The drive shaft 30 rotates about the motor axis J1 together with the 2 nd carrier 34c on one axial side of the motor portion 20. Further, the axial one-side front end of the drive shaft 30 is rotatably supported by the cover member 19.
The drive unit 2 of the present embodiment includes the planetary gear mechanism 32, and the planetary gear mechanism 32 is located on one axial side of the motor unit 20 and rotates about the motor axis J1. Therefore, the drive unit 2 decelerates and outputs the power from the drive shaft 30 in the process of transmitting the power of the motor 21. The planetary gear mechanism 32 of the present embodiment includes two types of sun gears and planetary gears, and is decelerated in two stages. Therefore, according to the drive unit 2 of the present embodiment, a large reduction ratio can be achieved.
< sliding mechanism >
The slide mechanism 5 has a lead screw 51 and a guide shaft 52 extending in the axial direction, and a slide nut 53 inserted by the lead screw 51 and the guide shaft 52.
The lead screw 51 extends along a slide axis J3. An external thread is provided on the outer peripheral surface of the screw 51. The lead screw 51 is rotated about the slide axis J3 by the power of the drive unit 2 transmitted through the gear train 4.
The guide shaft 52 extends parallel to the lead screw 51. That is, the guide shaft 52 extends in the axial direction of the slide axis J3. The guide shaft 52 is located on the-X side with respect to the lead screw 51. Both end portions of the guide shaft 52 are fixed to the frame 10, respectively. That is, the guide shaft 52 is supported on the frame 10.
The slide nut 53 has a nut hole 53n into which the lead screw 51 is inserted and a slide hole 53s into which the guide shaft 52 is inserted. An inner peripheral surface of the nut hole 53n is provided with a female screw to be fitted with the male screw of the screw shaft 51. The inner peripheral surface of the slide hole 53s contacts the outer peripheral surface of the guide shaft 52.
The slide nut 53 has a base portion 53a and a slide portion 53b embedded in the base portion 53 a. The sliding portion 53b is made of a low friction material. The sliding portion 53b constitutes the inner peripheral surface of the nut hole 53n and the sliding hole 53 s. With the rotation of the guide shaft 52 about the slide axis J3, the slide nut 53 is guided by the guide shaft 52 to move in the axial direction.
< Gear train >
The gear train 4 transmits power from the drive shaft 30 to the lead screw 51. The gear train 4 has a drive gear 41, an intermediate gear 42, and a pinion gear 43. The drive gear 41, the intermediate gear 42, and the pinion gear 43 are arranged in this order in the X-axis direction and transmit power. In the present embodiment, the number of teeth of the drive gear 41 is the same as that of the pinion gear 43. Therefore, the gear train 4 of the present embodiment does not perform deceleration and acceleration.
The drive gear 41 is fixed to the drive shaft 30. The drive gear 41 rotates with the drive shaft 30 about the motor axis J1.
The pinion 43 is fixed to the lead screw 51. The drive gear 41 rotates together with the lead screw 51 about the slide axis J3.
The intermediate gear 42 is rotatably supported on the intermediate shaft 11a extending to one side in the axial direction from the frame 10. The intermediate shaft 11a extends along an intermediate axis J2. Thus, the intermediate gear 42 rotates about the intermediate axis J2. The intermediate gear 42 is disposed between the drive gear 41 and the sub-gear 43. The intermediate gear 42 meshes with the drive gear 41 and the pinion gear 43, and transmits power from the drive gear 41 to the pinion gear 43.
< frame >
The frame 10 is formed in a frame shape. The frame 10 is formed, for example, by metal powder injection molding (MIM). The frame 10 supports the drive unit 2, the slide mechanism 5, and the gear train 4.
The frame 10 includes a 1 st support portion 11 and a 2 nd support portion 12 extending in the X axis direction, a 1 st beam portion 15 and a 2 nd beam portion 16 extending in the Z axis direction, and a plurality of (3 in the present embodiment) fixing portions 13.
The 1 st support portion 11 supports the axial end portions of the drive unit 2 and the slide mechanism 5. An internal gear 35 of the planetary gear mechanism 32 is fixed to the other surface of the 1 st support portion 11 in the axial direction. As described above, the internal gear 35 rotatably supports the 2 nd carrier 34c via the sliding bearing 35 a. The drive shaft 30 is fixed to the 2 nd carrier 34 c. That is, the 1 st support portion 11 rotatably supports the drive shaft 30 via the internal gear 35, the sliding bearing 35a, and the 2 nd carrier 34 c. Further, a drive gear 41 is fixed to the drive shaft 30 at a portion extending to one side in the axial direction with respect to the 1 st support portion 11.
The 1 st support portion 11 is provided with a 1 st holding hole 11j and a 2 nd holding hole 11k which penetrate in the axial direction and are aligned in the X-axis direction.
The 1 st retaining hole 11J extends along the sliding axis J3. The sliding bearing 11c is pressed into the 1 st holding hole 11 j. Thereby, the sliding bearing 11c is fixed to the 1 st support portion 11. A lead screw 51 is inserted into the slide bearing 11 c. The slide bearing 11c rotatably supports one axial end of the screw 51. That is, the 1 st support portion 11 rotatably supports an end portion of the screw shaft 51 on one axial side via the slide bearing 11 c. Further, a pinion gear 43 is fixed to an end portion of the screw shaft 51 on one axial side at a portion extending to one axial side with respect to the 1 st support portion 11.
The other axial end of the guide shaft 52 is pressed into the 2 nd holding hole 11 k. Thereby, the other axial end of the guide shaft 52 is fixed to the frame 10. Further, the 1 st support part 11 supports the other axial end of the guide shaft 52.
An intermediate shaft 11a extending to one side in the axial direction is provided on a surface of the 1 st support portion 11 facing one side in the axial direction. The intermediate shaft 11a extends in the axial direction about an intermediate axis J2. As described above, the intermediate shaft 11a rotatably supports the intermediate gear 42.
According to the present embodiment, the gears (the drive gear 41, the intermediate gear 42, and the pinion gear 43) constituting the gear train 4 are supported by shafts (the drive shaft 30, the intermediate shaft 11a, and the lead screw 51) extending to one axial side. Therefore, the gears can be assembled from one direction in the assembly process, and the assembly process can be simplified. Further, since all the shafts (the drive shaft 30, the intermediate shaft 11a, and the lead screw 51) are positioned by the frame 10, the inter-shaft distance of each shaft can be maintained with high accuracy, and the power transmission efficiency of the gear train 4 can be improved.
According to the present embodiment, the motor axis J1, the intermediate axis J2, and the slide axis J3 are linearly arranged as viewed in the axial direction. That is, the gears of the gear train 4 are arranged in one direction. Therefore, the geared motor 1 can be provided with a reduced size in the Y-axis direction. That is, according to the present embodiment, the geared motor 1 that can be mounted on a thin microcomputer such as a smartphone can be provided. In the present embodiment, the axes of the guide shaft 52 are included in addition to the motor axis J1, the intermediate axis J2, and the slide axis J3, and are all linearly arranged as viewed in the axial direction. Therefore, according to the present embodiment, the stability of the sliding movement of the slide nut 53 can be improved by the guide shaft 52, and the increase in the dimension in the Y-axis direction can be suppressed.
A cover member 19 is disposed on one axial side of the 1 st support portion 11. The cover member 19 covers the gear train 4 from the axial side. The cover member 19 suppresses adhesion of dust and the like to the gear train 4, and suppresses deterioration of power transmission efficiency in the gear train 4.
The cover member 19 has a plate-shaped bottom portion 19a perpendicular to the motor axis J1, and an outer wall portion 19b extending from the outer edge of the bottom portion 19a to the other side in the radial direction. The bottom portion 19a is axially opposed to the gear train 4. The bottom portion 19a has holding holes 19p, 19q, and 19r on its surface facing the other axial side. The drive shaft 30, the intermediate shaft 11a, and the leading end of the screw 51 on one axial side are inserted into the holding holes 19p, 19q, and 19r, respectively. Thus, the drive shaft 30, the intermediate shaft 11a, and the lead screw 51 are rotatably supported by the cover member 19 at the axial one end.
According to the present embodiment, the drive shaft 30, the intermediate shaft 11a, and the lead screw 51 are supported on both sides in the axial direction with respect to the gears respectively held. Therefore, the rotation of the drive shaft 30, the intermediate shaft 11a, and the lead screw 51 is stabilized, and the power transmission efficiency in the gear train 4 can be improved.
The 2 nd support portion 12 supports the other axial end of the slide mechanism 5. The 2 nd support portion 12 is provided with a 3 rd holding hole 12j and a 4 th holding hole 12k which penetrate in the axial direction and are aligned in the X-axis direction.
The 3 rd retaining hole 12J extends along the sliding axis J3. A ball bearing 12c is disposed in the 3 rd holding hole 12 j. A lead screw 51 is inserted into the ball bearing 12 c. The ball bearing 12c rotatably supports the other axial end of the lead screw 51. That is, the 2 nd support portion 12 rotatably supports the other end portion of the screw shaft 51 in the axial direction via the ball bearing 12 c.
The other axial end of the guide shaft 52 is pressed into the 4 th holding hole 12 k. Thereby, the other axial end of the guide shaft 52 is fixed to the frame 10. In addition, the 2 nd support portion 12 supports the other axial end of the guide shaft 52.
The 1 st beam portion 15 extends axially between the drive unit 2 and the slide mechanism 5. The 1 st beam portion 15 connects the 1 st support portion 11 and the 2 nd support portion 12. According to the present embodiment, the support portions (the 1 st support portion 11 and the 2 nd support portion 12) that support both end portions of the slide mechanism 5 are connected by the 1 st beam portion 15. That is, both end portions of the slide mechanism 5 are supported by the frame 10 as a single member. Therefore, the parallelism of the lead screw 51 and the guide shaft 52 of the slide mechanism 5 can be easily maintained, and the driving efficiency of the slide mechanism 5 can be improved.
The 1 st beam portion 15 extends from the other side in the axial direction of the 1 st support portion 11 toward the other side in the axial direction. On the other hand, an intermediate shaft 11a is provided on the surface of the 1 st support portion 11 facing one axial side. That is, the 1 st beam portion 15 and the intermediate shaft 11a extend from the surface opposite to the 1 st support portion 11. The intermediate shaft 11a is disposed coaxially with the 1 st beam portion 15. This improves the rigidity of the intermediate shaft 11a and suppresses vibration of the intermediate shaft 11a in the 1 st beam part 15. In addition, when the frame 10 is manufactured by molding, the intermediate shaft 11a and the 1 st beam portion 15 are arranged coaxially, so that the flow of the material is improved, and the filling rate of the material into the intermediate shaft 11a can be increased.
The 2 nd beam portion 16 connects the 1 st support portion 11 and the 2 nd support portion 12. Further, the slide mechanism 5 is disposed between the 1 st beam portion 15 and the 2 nd beam portion 16. According to the present embodiment, the frame 10 is provided in a frame shape so as to surround the slide mechanism 5. This can increase the rigidity of the frame 10, and even when an impact or the like is applied to the frame 10, it can suppress deformation of the frame 10 and deterioration of the driving efficiency of the slide mechanism 5. Further, since the frame 10 has a frame shape, when the frame 10 is manufactured by molding, the molding accuracy of the frame 10 is easily improved.
The fixing portion 13 is plate-shaped extending along the X-Z plane. Each fixing portion 13 is provided with a fixing hole 13p penetrating in the plate thickness direction. A fixing screw for fixing the geared motor 1 to an external member (not shown) is inserted into the fixing hole 13 p.
Here, the 3 fixing portions 13 are referred to as a 1 st fixing portion 13A, a 2 nd fixing portion 13B, and a 3 rd fixing portion 13C, respectively. The 1 st fixing portion 13A is continuous with one surface of the 1 st supporting portion 11 in the axial direction. The 2 nd fixing portion 13B is continuous with the surface of the 2 nd supporting portion 12 facing the other side in the axial direction. The 3 rd fixing portion 13C is connected to the surface of the 2 nd beam portion 16 facing the-X side.
According to the present embodiment, the frame 10 has a fixing portion 13 for fixing to an external member, and supports the slide mechanism 5 that transmits power to an external device. Therefore, the positional accuracy of the output portion with respect to the external member can be easily improved, and the power of the motor 21 can be efficiently transmitted to the external device.
In fig. 2, a 4 th fixing portion 13V as a modification of the fixing portion 13 is shown in a phantom line. The 4 th fixing portion 13V is preferably provided on the frame 10 in place of the 2 nd fixing portion 13B, for example. The 4 th fixing section 13V is a plate-like section extending along the X-Z plane, similarly to the 1 st fixing section 13A, the 2 nd fixing section 13B, and the 3 rd fixing section 13C.
The 4 th fixing portion 13V is disposed at a side portion of the other end portion in the axial direction of the guide shaft 52 as viewed in the plate thickness direction (Y-axis direction) of the fixing portion 13. Similarly, the 1 st fixing portion 13A is disposed on a side portion of one axial end of the guide shaft 52. That is, two of the fixing portions (the 1 st fixing portion 13A and the 4 th fixing portion 13V) are disposed on both sides of the guide shaft 52 in the axial direction as viewed from the plate thickness direction of the fixing portion 13. Further, the fixing holes 13p of the 1 st fixing portion 13A and the 4 th fixing portion 13V are located on the extension line of the guide shaft 52 as viewed in the plate thickness direction (Y-axis direction) of the fixing portion 13.
The driving force of the slide nut 53 and the external force transmitted from the member to be driven of the slide nut 53 are transmitted to the guide shaft 52. According to this modification, the frame 10 is fixed to the outer member at both end portions of the guide shaft 52, whereby the guide shaft 52 can be stably fixed. Therefore, the guide shaft 52 is less likely to be deformed even when a force is applied thereto, and can assist smooth sliding operation of the slide nut 53.
Fig. 3 is a plan view of a gear motor 101 according to a modification. Similarly to the above embodiment, the geared motor 101 of the present modification includes a drive unit 102, a slide mechanism 105, a gear train 104, and a frame 110. As in the above-described embodiment, the slide mechanism 105 includes the lead screw 151 and the guide shaft 152 extending in the axial direction, and the slide nut 153 inserted by the lead screw 151 and the guide shaft 152. The frame 110 has a plurality of fixing portions 113 for fixing to an external member.
As shown in fig. 3, two fixing portions 113 of the plurality of fixing portions 113 are disposed on both sides in the axial direction of the guide shaft 152 as viewed from the plate thickness direction of the fixing portions 113. Further, the fixing holes 113p provided in the respective fixing portions 113 are located on the extension line of the guide shaft 152 when viewed from the plate thickness direction of the fixing portions 113. Therefore, as in the modification described above, the guide shaft 152 can be stably fixed, and the slide nut 153 can be smoothly operated.
While the embodiment and the modified examples of the present invention have been described above, the configurations and combinations thereof in the embodiment are only 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.
Claims (9)
1. A gear transmission motor is characterized in that,
the gear transmission motor has:
a drive unit having a motor portion extending along a motor axis and a drive shaft rotating around the motor axis on one side in an axial direction of the motor portion;
a slide mechanism having a lead screw rotatable about a slide axis parallel to the motor axis and a slide nut inserted by the lead screw;
a gear train that transmits power from the drive shaft to the lead screw; and
a frame supporting the drive unit, the slide mechanism, and the gear train,
the frame has a 1 st support portion for rotatably supporting one axial end portions of the drive shaft and the lead screw,
the gear train has:
a drive gear fixed to the drive shaft extending to one side in an axial direction with respect to the 1 st support portion;
a pinion gear fixed to the screw shaft extending to one side in an axial direction with respect to the 1 st support portion; and
an intermediate gear engaged with the driving gear and the pinion gear,
an intermediate shaft centered on an intermediate axis parallel to the motor axis is provided on a surface of the 1 st support portion facing one axial side,
the intermediate gear is rotatably supported on the intermediate shaft.
2. The geared motor of claim 1,
the geared motor has a cover member covering the gear train from an axial side,
a holding hole into which the drive shaft, the intermediate shaft, and the leading end of the screw shaft on one axial side are inserted is provided in a surface of the cover member facing the other axial side.
3. The geared motor of claim 1,
the motor unit has a plurality of motors stacked in an axial direction,
the rotors of the plurality of motors are interconnected in the axial direction to constitute a coupling rotor.
4. The geared motor of claim 1,
the drive unit has a planetary gear mechanism connected to the motor section,
the drive shaft extends from the planetary gear mechanism to one axial side.
5. The geared motor of claim 1,
the drive gear, the intermediate gear, and the pinion gear are linearly arranged when viewed in an axial direction.
6. The geared motor of claim 1,
the frame has:
a 2 nd support portion that rotatably supports an end portion on the other axial side of the lead screw; and
a 1 st beam portion extending in an axial direction between the drive unit and the slide mechanism, and connecting the 1 st support portion and the 2 nd support portion.
7. The geared motor of claim 6,
the intermediate shaft and the 1 st beam portion are arranged coaxially.
8. The geared motor of claim 6,
the frame has a 2 nd beam portion connecting the 1 st and 2 nd support portions,
the sliding mechanism is disposed between the 1 st beam section and the 2 nd beam section.
9. The gear transmission motor according to any one of claims 1 to 8,
the frame has a plurality of fixing portions which are plate-shaped and extend in the axial direction and are provided with fixing holes penetrating in the plate thickness direction,
the slide mechanism has a guide shaft supported by the frame and extending in parallel with the lead screw,
two of the plurality of fixing portions are disposed on both sides of the guide shaft in the axial direction when viewed from the plate thickness direction of the fixing portion, and the fixing holes are located on an extension line of the guide shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-140037 | 2019-07-30 | ||
| JP2019140037A JP7355544B2 (en) | 2019-07-30 | 2019-07-30 | geared motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212935704U true CN212935704U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021537087.3U Active CN212935704U (en) | 2019-07-30 | 2020-07-29 | Gear drive motor |
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| JP (1) | JP7355544B2 (en) |
| CN (1) | CN212935704U (en) |
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| CN113048210B (en) * | 2021-03-10 | 2022-03-15 | 极限人工智能有限公司 | Structure module for multi-shaft transmission torque and push-pull force transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6294606B2 (en) * | 2013-08-20 | 2018-03-14 | 株式会社アイカムス・ラボ | Linear motion device |
| WO2017002870A1 (en) * | 2015-06-30 | 2017-01-05 | ミネベア株式会社 | Screw structure, feeding device, medical apparatus, and infusion pump |
| JP2019047589A (en) * | 2017-08-31 | 2019-03-22 | 日本電産コパル株式会社 | Gearbox device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7355544B2 (en) | 2023-10-03 |
| JP2021023080A (en) | 2021-02-18 |
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