JP2013019523A - Geared motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geared motor, which has high motor output and compactness, and is reduced in production cost.SOLUTION: The geared motor 10 includes: a one-stage hypoid gear 20; a motor M having its output shaft 11 connected to a hypoid pinion 24; a gear box 12 connected to the motor M for housing a hypoid ring gear 22 engaged with the hypoid pinion 24; and mounting members 30 and 30 for fixing. In the front view seen from the direction of a last output shaft 26 in Fig.1, the gear box 12 includes: two upper and lower sides 12a and 12c parallel to each other; a side 12b perpendicularly connecting one end thereof; and an oblique side 12d obliquely connecting the other end. The motor M is obliquely connected to the oblique side 12d within the height (vertical distance between two upper and lower sides) of the gear box 12. Thus, the output of the motor M is maintained, and the motor is made compact. Since a parallel gear or the like other than the hypoid gear 20 is unnecessary, the production cost can be reduced.

Description

  The present invention relates to a geared motor using a hypoid gear (hereinafter simply referred to as “geared motor”).

  Hypoid gears are made by providing an offset between the pinion shaft and the ring gear shaft of the bevel gear bevel and meshing the pinion and ring gear, and have the characteristics of being quieter and more smoothly driven than the bevel gear bevel gear. Have. And since the hypoid gear is an orthogonal gear, the maximum dimension of the geared motor using this is the dimension in the axial direction of the motor, for example, it is installed in parallel with the conveying direction of the belt conveyor such as logistics conveyance, food conveyance, automatic door, etc. Sometimes compactness can be achieved. For this reason, geared motors using hypoid gears are widely used as driving devices for various belt conveyors.

For such a geared motor, not only cost reduction but also compactness that can be installed in a narrow space such as the inside of a belt conveyor and high output of the motor are required at the same time. However, if compactness is emphasized and the motor is made smaller, the output becomes lower, and if the motor size is increased in order to increase the motor output, the compactness is lacking. Moreover, if a high-performance motor that is small but has high output is used, production costs are incurred, making it impossible to reduce the price. That is, the geared motor has a problem that is difficult to achieve.
In the case of a geared motor using a hypoid gear, the hypoid gear in one stage has a hypoid pinion axis, that is, an input shaft, and a hypoid ring gear axis, that is, an output shaft, due to an offset between the axes specific to the hypoid gear. Cannot be placed on the same line. Therefore, there is a problem that a deviation of offset occurs between the motor and the gear box, and the motor or the gear box protrudes.

  In order to solve the above-mentioned problems and problems of the geared motor, various improvements have been added to the geared motor, and examples thereof include the following.

JP 2000-35106 A Japanese Patent Laid-Open No. 10-299840

Patent Document 1 discloses a geared motor in which a motor output shaft has a hypoid gear pinion, a parallel gear is connected to the hypoid gear output shaft, and a gear meshing with the parallel gear is a final output shaft. A geared motor with a step is disclosed by shortening the axial dimension of the gear box at the portion serving as the final output shaft. According to this configuration, it is supposed that the final output shaft can be made compact in the axial direction.
Patent Document 2 discloses a geared motor in which an output shaft of a motor is connected to a parallel gear, an output shaft of the parallel gear is connected to a hypoid pinion of a hypoid gear, and a hypoid ring gear shaft that meshes with the hypoid pinion is a final output shaft. And what the final output shaft was arrange | positioned in the approximate center part of the hypoid gear attachment hole of a gear box is disclosed. According to this structure, it is said that the problem of the shift | offset | difference of a motor and a gear box by the geared motor whose position of an output shaft does not change with the attachment direction of a motor, ie, an offset, is supposed to be improved.

Here, as shown in FIG. 7, in the case of the geared motor 100 as in Patent Document 1, the axial direction of the output shaft can be reduced, but the gear of the motor 104 and the hypoid ring gear corresponds to the offset amount of the hypoid gear. Since the position of the box 152 is shifted, the motor 104 protrudes from the gear box 152 by the length W in the radial direction of the motor. For this reason, it is impossible to reduce the size of the hypoid gear in the offset direction.
Further, in the case of the geared motor as in Patent Document 2, the offset of the hypoid gear is eliminated by providing one stage of parallel gears. However, as the number of parallel gears increases, gears, shafts, bearings, and gear boxes are used. This leads to an increase in the number of parts, leading to an increase in production costs. The same applies to a geared motor having a parallel gear at the next stage of the hypoid gear as in Patent Document 1.

  SUMMARY OF THE INVENTION In view of the above-described problems of the prior art, an object of the present invention is to provide a geared motor that has both high output and compactness of the motor and that can reduce production costs.

The present invention includes a one-stage hypoid gear, a motor whose output shaft is connected to the hypoid pinion, a hypoid ring gear having a final output shaft that meshes with the hypoid pinion, and the hypoid ring gear, and is connected to the motor. Have a gearbox,
In the front view seen from the final output shaft direction, the gear box is composed of two parallel upper and lower sides, a side connecting one end thereof at a right angle, and a hypotenuse connecting the other end diagonally,
The problem is solved by a geared motor, wherein the motor is connected to the hypotenuse within a range of the height of the gear box. Further, as in claim 2, it is preferable that the ratio of the height of the gear box to the diameter of the motor is in a range larger than 1: 1 and smaller than 1.4: 1. As described above, the gear box and the motor may be integrally formed.

  In a preferred embodiment, the fixing member for fixing the geared motor is attached to both ends within the range of the height of the gear box.

  According to the present invention, a geared motor having a gear box that houses a one-stage hypoid gear, a motor whose output shaft is connected to a hypoid pinion, and a hypoid ring gear that meshes with the hypoid pinion and is connected to the motor, Since the motor is connected to the gear box at an angle within the range of the height of the gear box, the problem of the motor with respect to the gear box due to the shift of the gear box due to the offset of the hypoid gear and the motor has been a problem. Protrusions can be eliminated.

  In addition, since the hypoid gear has a one-stage configuration, the number of parts can be reduced compared to a geared motor using other parallel gears, and the production cost can be reduced. Needless to say, since there are no other parallel gears, etc., it is excellent in quietness and operates smoothly.

  Further, in order to make the motor fit within the range of the height of the gear box, the ratio of the height of the gear box to the diameter of the motor is larger than 1: 1 and 1.4: It is appropriate to be within a range smaller than 1. If this ratio is 1: 1, the motor cannot be connected obliquely to the gearbox within the dimensions of the gearbox, and if this ratio is 1.4: 1 or greater, This is because the motor can be accommodated within the height range of the gear box without connecting the motor at an angle, but the motor diameter becomes too small and the output decreases.

  In addition, according to this configuration, even if the radial dimension of the motor is shortened, the axial length can be increased, so that the height of the gear box is maintained while maintaining the output of the motor as compared with the conventional case. The size of the direction can be made compact.

  Further, as in claim 3, the gear box and the motor may be integrally formed.

  Further, as in claim 4, if the fixing member for fixing the geared motor is attached to both ends within the range of the height of the gear box, the compactness is not impaired, and the size of the hypoid ring gear is reduced. It is preferable because it can be maximized and maximize the gear capability.

The longitudinal cross-sectional view of 1st Embodiment of this invention. The top view for description of the diagonal connection state of the hypoid gear of this invention. The front view and top view which show the outline of various embodiment of this invention. The longitudinal cross-sectional view of 2nd Embodiment of this invention. The front view which shows the outline of the state which has arrange | positioned this invention outside the belt conveyor. The front view which shows the outline of the state which has arrange | positioned this invention inside the belt conveyor. The longitudinal cross-sectional view of the conventional geared motor.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. However, the present invention is not limited to this embodiment.

The geared motor 10 shown in FIG. 1 includes a one-stage hypoid gear 20, a motor M whose output shaft 11 is connected to the hypoid pinion 24, and a hypoid ring gear 22 that meshes with the hypoid pinion 24. It has a box 12 and mounting members 30 and 30 for fixing. In addition, the motor M means the whole thing including a housing, and the hypoid pinion 24 and the output shaft 11 may be formed integrally. “Linked” includes such a case.
In the front view of FIG. 1 as viewed from the direction of the final output shaft 26, the gear box 12 is composed of two parallel upper and lower sides 12a and 12c, a side 12b connecting one end of the right angle and a hypotenuse 12d connecting the other end diagonally, The motor M is obliquely connected to the hypotenuse 12d within the range of the height of the gear box 12 (the vertical distance between the upper and lower sides).

  Next, as shown in FIG. 2, the hypoid ring gear 22 and the hypoid pinion 24 are moved from the state (a) in which the hypoid ring gear 22 and the hypoid pinion 24 are meshed with an offset as usual to the position (b). Even if the hypoid ring gear 22 and the output shaft 11 are rotated in the direction of the arrow about the center C of the hypoid ring gear 22 while being engaged, there is no influence on the meshing relationship between the hypoid ring gear 22 and the hypoid pinion 24. There is no. Thus, there is no technical problem and the motor M is obliquely connected to the gear box 12 as shown in FIG. The motor M can be accommodated within the range of the height GL of the gear box 12 by being connected to the gear box 12 at an angle. Thus, since the protrusion of the motor M with respect to the gear box 12 that has been a problem in the past can be eliminated, the gear box can be made compact in the height GL direction. In addition, the length in the axial direction of the motor M may be increased to improve the motor capacity as long as it is within a range that fits within the height GL of the gear box.

  At this time, in order to keep the motor M within the range of the height GL of the gear box, the ratio between the height GL of the gear box and the diameter ML of the motor M is larger than 1: 1 and smaller than 1.4: 1. It is appropriate to be within the range. If the ratio is 1: 1, the motor M cannot be obliquely connected to the gear box 12 within the range of the height GL of the gear box, and the ratio is 1.4: 1 or more. If there is, the motor M does not protrude from the gear box 12 without being inclined, but the diameter of the motor M becomes too small and the output is reduced. If the thickness of the motor core is increased in order to compensate for the low output, the production cost increases. In other words, by making the ratio of the gear box height GL and the diameter dimension ML of the motor M larger than 1: 1 and smaller than 1.4: 1, the compactness of the geared motor 10 can be reduced. This can be realized, the output of the motor M can be maintained, and the production cost can be reduced.

  Further, since the fixing attachment members 30 and 30 are provided at both ends of the geared motor 10 within the range of the height GL of the gear box, the compactness of the geared motor 10 is not impaired. In addition, according to this configuration, even if the height of the installation location is limited due to circumstances such as the installation location, the size of the hypoid ring gear 22 can be maximized. It is possible to avoid a reduction in the capacity of the hypoid gear 20 due to the reduction in the diameter of 22. Note that the fixing attachment member can be attached only to one of the ends, but the attachment to both ends is superior in stability.

  Next, FIG. 3 is the front view and top view which show the outline of various embodiment of the geared motor of this invention. 3A to 3C have a solid final output shaft 26 and a drive pulley 14. Moreover, as shown in (d), it can also be set as the structure which has the hollow final output shaft 26d. The mounting members 30a and 30a of (a) are each provided with a through hole, and are fixed to a female screw provided at the installation location with a bolt or the like. Further, the mounting members 30b and 30b in (b) are provided with one or two female screws, and a bolt or the like is screwed to the female screw of the mounting member. Further, the mounting members 30c and 30c in (c) have a flat portion in which neither a female screw nor a hole is provided, and the flat portion is inserted into or attached to a mounting bracket provided at an installation location. Is. Thus, various attachment members can be employed according to the specifications of the installation location.

  Further, as shown in FIG. 4, the motor M and the gear box 12e may be integrally formed so that the entire geared motor 10e has no unevenness. In this case as well, the hypotenuse in FIG. 1 can be assumed.

  Next, FIGS. 5 and 6 are front views schematically showing a state when the geared motor 10 of the present invention is assembled to the belt conveyor 40. FIG. In the belt conveyor 40 of FIG. 5, a belt 42 is hung on the drive pulley 14 and the driven pulley 18 of the geared motor 10, and the geared motor 10 is located outside the belt 42. In the belt conveyor 40, since there is no protrusion of a motor like a conventional geared motor, the maximum height when assembling is within the belt conveyor height VL, and the height of the belt conveyor 40 is more compact than the conventional one. . In addition, as shown in FIG. 6, if the geared motor 10 is installed inside the belt 42, not only the height but also the width can be made compact. Since the height of the geared motor 10 is within the height VL of the belt conveyor, if the geared motor 10 is rotated around the output shaft of the geared motor 10, the pulley on either the left or right side of the belt conveyor It can be applied without changing the design. 5 and 6, the geared motor 10 is attached to a mounting location (not shown) with a bolt or the like inserted into the through holes of the mounting members 30 and 30. Further, since the geared motor 10 can be mounted on both the left and right sides of the belt conveyor, the geared motor 10 can be easily selected in consideration of the relationship with wiring and other parts. it can.

  As described above, according to the present invention, the motor output is maintained and the size of the motor is reduced by being obliquely coupled to the gear box so that the motor is within the height range of the gear box. It becomes possible to plan. Further, even if the hypoid gear is a one-stage geared motor, it is possible to eliminate the protrusion of the motor with respect to the gear box due to the offset of the hypoid gear. And since it is not necessary to use a parallel gear etc., production cost can be held down.

DESCRIPTION OF SYMBOLS 10 Geared motor 11 Output shaft 12 Gear box 12a Upper side 12b Side which connects one end of two upper and lower sides at right angle 12c Lower side 12d Slanted side 20 Hypoid gear 22 Hypoid ring gear 24 Hypoid pinion 26 Final output shaft 30 Mounting member M Motor GL Height of gear box ML Motor diameter

Claims (4)

There is a one-stage hypoid gear, a motor whose output shaft is connected to the hypoid pinion, a hypoid ring gear having a final output shaft that meshes with the hypoid pinion, and a gear box that houses the hypoid ring gear and is connected to the motor. And
In the front view seen from the final output shaft direction, the gear box is composed of two parallel upper and lower sides, a side connecting one end thereof at a right angle, and a hypotenuse connecting the other end diagonally,
The motor is connected to the hypotenuse within the range of the height of the gear box,
Geared motor.   The geared motor of claim 1, wherein the ratio of the gearbox height to the motor diameter is in a range greater than 1: 1 and less than 1.4: 1.   The geared motor according to claim 1 or 2, wherein the gear box and the motor are integrally formed.   The geared motor according to any one of claims 1 to 3, wherein the fixing member for fixing the geared motor is attached to both ends within a range of the height of the gear box.

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