JP2004266980A - Manufacturing method for hypoid geared motor and series thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promote sharing of members in a series of hypoid geared motors and make deliverable low-cost hypoid geared motors in a short delivery time. <P>SOLUTION: The hypoid pinion 112 of a first hypoid geared motor HG101, which is a component of a series, is formed so that it can be rotated integrally with the motor shaft 104 of a motor 102. The amount δ101 of offset of the hypoid pinion 112 and a hypoid gear 116 is adjusted so that it will be equal to the amount of offset (δ201) of another second hypoid geared motor. Each hypoid gear set 130 and the like are placed in the identical casing 130. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The invention relates to a series of hypoid geared motors.
[0002]
[Prior art]
As a geared motor used to drive a timing belt of an automatic door or a conveyor belt of a conveyor, a so-called orthogonal type geared motor in which a motor shaft of a motor and an output shaft of a speed reducer are in an orthogonal relationship is generally used. This is because this type of automatic door or conveyor has a relatively large space in the direction in which the timing belt or the conveyor belt moves, so that the direction of the motor shaft coincides with this direction and the output thereof is adjusted. This is because if the rollers and sprockets for rotating the timing belt and the transport belt are driven by performing the orthogonal transformation, rational installation in terms of space can be achieved.
[0003]
A single-stage hypoid geared motor including a motor, a hypoid pinion that rotates integrally with the motor shaft, a hypoid gear that meshes with the hypoid pinion in an offset state, and an output shaft provided on the hypoid gear, This is one of a kind of orthogonal type geared motor, and can simultaneously perform orthogonal transformation of the rotation axis of the motor and reduction of the rotation speed.
[0004]
Hypoid geared motors are more efficient than worm geared motors used for similar purposes, and are superior in terms of lower noise and higher reduction ratio than bevel geared motors. .
[0005]
For example, Patent Document 1 discloses a hypoid geared motor HD1 as shown in FIG.
[0006]
The motor shaft 4 of the motor 2 is supported on a motor casing 10 by bearings 6 and 8. A hypoid pinion 12 is directly toothed at the end of the motor shaft 4, and the hypoid pinion 12 meshes with a hypoid gear 16 mounted on the output shaft 14. As a result, the rotation of the motor shaft 4 is converted in the orthogonal direction and output from the output shaft 14 in a decelerated state.
[0007]
The reduction gear 18 accommodates a hypoid gear set S <b> 1 including the hypoid pinion 12 and the hypoid gear 16 in a reduction gear casing 20. Since the hypoid gear set S1 can form a wide reduction ratio even in one stage, the basic configuration alone can be applied to many uses.
[0008]
The motor casing 10 and the reduction gear casing 20 are integrated by bolts 24.
[0009]
[Patent Document 1]
JP 2001-124155 A
[0010]
[Problems to be solved by the invention]
However, since the hypoid geared motors conventionally proposed, including this known example, are premised on the fact that they exist alone, a motor with a slightly different output or a slightly different reduction ratio or capacity according to the needs of the user. If an attempt is made to prepare a different speed reducer, the entire hypoid geared motor must be redesigned. As a result, there is a problem that not only costs are increased but also the delivery date is delayed.
[0011]
More specifically, as in the above-described known example, in general, in a hypoid geared motor, the hypoid pinion is directly cut into the motor shaft in order to shorten the motor axial direction length and reduce the number of parts. ing. That is, the axis of the hypoid pinion coincides with the axis of the motor shaft. Here, when the capacity of the motor is changed to be smaller, for example, the size (diameter) of the hypoid pinion becomes smaller and the size of the hypoid gear is designed to be smaller. As a result, the offset amount of the hypoid gear set also becomes smaller. . Then, since the positional relationship between the input shaft and the output shaft of the reduction gear shifts, the casing of the high-cost reduction gear must eventually be redesigned separately in the conventional design. Was.
[0012]
On the other hand, “decreasing the motor capacity” is generally based on a demand for lower noise, but as described later, in the conventional design method, the motor is changed to a smaller motor in this manner. Even so, there have been circumstances in which it is often not possible to obtain an effect that sufficiently satisfies the demand for "low noise".
[0013]
The present invention has been made to solve such a conventional problem, and when a manufacturer develops a hypoid geared motor as a series, between individual hypoid geared motors that are components of the series, The sharing of parts can be promoted, and as a result, low-cost hypoid geared motors can be delivered in a short delivery time. It is an object of the present invention to provide such a series configuration.
[0014]
[Means for Solving the Problems]
The present invention provides a motor, a hypoid pinion that rotates integrally with a motor shaft, a hypoid gear that meshes with the hypoid pinion in an offset state, an output shaft provided on the hypoid gear, the hypoid pinion, and the hypoid gear. A one-stage hypoid geared motor having a reduction gear casing accommodating the hypoid gear set, wherein the first hypoid gear set has a different shape from the first hypoid gear set, and the offset amount is smaller than the first hypoid gear set. A selecting step of selecting any one of the same second hypoid gear sets; a preparing step of preparing a reduction gear casing capable of accommodating any of the first hypoid gear sets and the second hypoid gear sets; The hypoid gear set selected in the selecting step By adopting the manufacturing method including the accommodation step for accommodating the reduction gear casing, in which the above-mentioned problems are eliminated.
[0015]
In other words, the present invention provides a motor, a hypoid pinion that rotates integrally with the motor shaft of the motor, a hypoid gear that meshes with the hypoid pinion in an offset state, an output shaft provided on the hypoid gear, A series of one-stage hypoid geared motors having a reduction gear casing containing a hypoid gear set comprising a pinion and said hypoid gears, wherein the first hypoid geared motor has a first hypoid gear set; And at least a second hypoid geared motor having a second hypoid gear set having a different shape but the same offset amount as the hypoid gear set of the first hypoid geared motor. Reducer casing and said By the second reduction gear casing of hypoid geared motor are the same shape, it is obtained by solving the above problems.
[0016]
In the present invention, for example, even if the hypoid pinions of the first and second hypoid gear sets are changed by changing the capacity of the motor, the first and second hypoid gear sets are adjusted by adjusting the hypoid gear side. The design is intentionally made so that the offset amount does not change between them. As a result, the reduction gear casing can maintain a common positional relationship between the input shaft and the output shaft, and can be shared by both geared motors.
[0017]
In the present invention, in order to concretely realize a configuration in which the offset amount does not change, for example, in order to reduce the noise by changing the motor capacity to a small value, even if the hypoid pinion becomes small, Instead of making the hypoid gear smaller, it is necessary to combine a hypoid gear that is larger than the hypoid gear that normally forms a pair. As a result, the meshing ratio is further increased, and the noise can be further reduced.
[0018]
On the other hand, when observing this by reversing the large and small criterion, when trying to achieve higher output by changing the motor capacity significantly, even if the hypoid pinion becomes large, the hypoid gear should be enlarged accordingly. Instead, a hypoid gear that is smaller than a normal pair of hypoid gears is combined. As a result, the meshing ratio becomes smaller, and a more efficient drive system can be formed.
[0019]
These qualitative trends are in line with the direction to more effectively realize the intention to change the combination of the motor and the reducer from the standard combination, and the intended effect in each combination is sufficiently achieved. Contribute to make it work.
[0020]
In particular, for example, when the first and second hypoid geared motors having the same offset amount have different hypoid pinions and hypoid gears from each other and have the same reduction ratio, This qualitative effect can be obtained simply while keeping the driven speed of the driven side unchanged.
[0021]
Further, the first and second hypoid geared motors having the same offset amount each have a common casing identical to that of the reduction gear casing, including the casing of the motor. In the case where the motor is provided as a constituent element, the reduction gear casing can be shared with the motor casing, and the sharing of the entire hypoid geared motor can be further promoted.
[0022]
The first and second hypoid geared motors having the same offset amount each have a mounting hole for the counterpart machine in the reduction gear casing, and the positions and sizes of the mounting holes are the same. With such a configuration, the compatibility of mounting (replacement) can be ensured, which is more favorable.
[0023]
Here, the ratio between the same offset amount and the equivalent bevel gear cone distance of each hypoid gear of the first and second hypoid gear sets is 0.5 or less, more preferably 0.20 to 0.20. By setting the value in the range of 0.50, it is possible to obtain characteristics in which each of the hypoid geared motors appropriately achieves both high efficiency and low noise.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a series of hypoid geared motors according to the present invention will be described in detail with reference to the drawings.
[0025]
FIG. 1 and FIG. 2 show two typical examples (first and second hypoid geared motors) of specific hypoid geared motors which are constituent elements of this series, respectively. In both the first and second hypoid geared motors HG101 and HG201, hypoid pinions 112 and 212 are directly toothed at the tips of the motor shafts 104 and 204 of the motors 102 and 202, and the hypoid gear 116 meshes with the hypoid pinions 112 and 212. , 216, the output shafts 114, 214 on which the hypoid gears 116, 216 are mounted are driven.
[0026]
For convenience of description, the second hypoid geared motor HG201 illustrated in FIG. 2 will be described.
[0027]
The second hypoid geared motor HG201 connects the motor 202 and the speed reducer 218. The speed reducer 218 has a one-stage (second) hypoid gear set S201 including a hypoid pinion 212 and a hypoid gear 216.
[0028]
The casing (motor casing) 210 of the motor 202 is designed to have an optimal size for accommodating the motor main body 203 that can generate an output of 60 W. The casing (reducer casing) 220 of the speed reducer 218 is also optimally large for accommodating the hypoid gear set S201 designed to be generally connected to the 60W motor 202.
[0029]
The reduction gear casing 220 is separated into a casing main body 220a and an output shaft cover 220b. The output shaft cover 220b is connected to the casing body 220a via bolts 232. The motor casing 210 and (the main body 220a of) the reduction gear casing 220 are integrally formed from the beginning, not by connection with bolts or the like, to form a single casing 230.
[0030]
The output shaft 214 of the speed reducer 218 is housed in the speed reducer casing 220 so as to be orthogonal to the motor shaft 204 via the bearings 206 and 208 with an offset amount δ201. The bearing 206 is mounted on the main body 220a of the reduction gear casing 220, and the bearing 208 is mounted on the output shaft cover 220b. Reference numerals 260a to 260d in the drawings are mounting holes for mounting the second hypoid geared motor HG201 to a mating machine. In this embodiment, the mounting holes 260a to 260d share the bolt holes of the bolts 232 connecting the output shaft cover 220b and the main body 220a.
[0031]
The motor shaft 204 of the motor 202 has an outer diameter d201 of the main body 203, and is supported by the motor casing 210 via bearings 236 and 238 so as not to move in the axial direction. The outer diameter of the portion supported by the bearing 238 is d202, the outer diameter of the hypoid pinion 212 is d203, and the formed length in the axial direction is L201.
[0032]
The outer diameter of the hypoid gear 216 is d204, and the equivalent bevel gear cone distance is GL202. As shown in FIG. 3, the equivalent bevel gear cone distance GL202 is a distance measured from the center GC201 of the hypoid gear 216 to the outer periphery 216a along the direction of the cone angle α201.
[0033]
The offset amount of the hypoid gear set 222 is δ201, and the reduction ratio is I201. The ratio between the offset amount δ 201 and the equivalent bevel gear cone distance GL 202 of the hypoid gear 216 is about 0.2. A cylindrical space S201 concentric with the axis GC201 of the hypoid gear 216, that is, the axis of the output shaft 214 is formed on the inner peripheral side of the reduction gear casing 220. The diameter of the space S201 is D201.
[0034]
On the other hand, FIG. 1 shows a 40 W hypoid geared motor (first hypoid geared motor) HG101 which is one of the components of this series.
[0035]
The first hypoid geared motor HG101 has the same basic structure as that of the already described 60W second hypoid geared motor HG201, except that only some of the components are different in size. Therefore, the same or similar parts in the figures are denoted by the same reference numerals in the 100's with the same last two digits, and redundant description will be omitted. Hereinafter, different parts will be described in detail.
[0036]
The differences between the first hypoid geared motor HG101 and the second hypoid geared motor HG201 are as follows.
[0037]
The first hypoid geared motor HG101 is different from the second hypoid geared motor HG201 in that the axial length L102 of the motor body 103 of the motor 102 is smaller than that of the second hypoid geared motor HG201. It is formed smaller than the axial length L202 of the main body 203 (L102 <L202). The outer diameter d103 of the hypoid pinion 112 is smaller than the outer diameter d203 of the hypoid pinion 212 of the second hypoid geared motor HG201 (d103 <d203) (due to the reduced motor capacity).
[0038]
However, the outer diameter d104 of the hypoid gear 116 is smaller than the outer diameter d204 of the hypoid gear 216 and the hypoid pinion so that the offset amount δ101 and, in this embodiment, the reduction ratio I101 are the same as those of the second hypoid geared motor HG201. The formation length L101 of the hypoid pinion 212 in the axial direction is formed to be longer than the formation length L201 of the hypoid pinion 212 in the axial direction (d104 <d204, L101> L201).
[0039]
The ratio between the offset amount δ101 of the first hypoid geared motor HG101 and the equivalent bevel gear cone distance GL102 of the hypoid gear 116 (see FIG. 3) is about 0.27.
[0040]
The difference between the first hypoid geared motor HG101 and the second hypoid geared motor HG201 is basically only this. That is, the casings 130 and 230 including the motor casings 110 and 210 and the reduction gear casings 120 and 220, the portions of the motor shafts 104 and 204 other than the portions where the hypoid pinions 112 and 212 are formed, and the output shafts 114 and 214 are all formed. The first hypoid geared motor HG101 and the second hypoid geared motor HG201 are formed to have the same dimensions, respectively. That is, the offset amount δ101 = δ201, the reduction ratio I101 = I201, the inner diameter D101 of the spaces S101 in the reduction gear casings 120 and 220 = D201, and the axial length L103 of the casing L103 = L203.
[0041]
Also, the bearings 106, 206, 108, 208 supporting the output shafts 114, 214 and the bearings 136, 236, 138, 238 supporting the motor shafts 104, 204 have the same dimensions, respectively. I have. The oil seals 150, 250, 152, and 252 have the same dimensions, and the positions and sizes of the mounting holes 160a to 160b and 260a to 260d of the reduction gear casings 118 and 218 with respect to the counterpart machine are the same. It has been.
[0042]
Next, the operation of the series of the first and second hypoid geared motors HG101 and HG201 according to this embodiment will be described.
[0043]
In order to facilitate understanding, a description will be given with reference to the hypoid geared motor HG9 shown in FIG. 5 in addition to the first and second hypoid geared motors HG101 and HG201 shown in FIGS. The hypoid geared motor HG9 corresponds to a configuration example in which a 40 W hypoid geared motor is designed by a conventional design method. The same or similar parts as those in FIGS. 1 and 2 are denoted by reference numerals in the 900s with the same upper and lower two digits for convenience. The hypoid geared motor HG9 is different from the 90W second hypoid geared motor HG201 shown in FIG. 2 in that the axial length L902 of the motor main body 903, the outer diameter d903 of the hypoid pinion 912, and the axially formed length L901, and , The outer diameter (equivalent bevel gear cone distance) GL901 of the hypoid gear 916 is different.
[0044]
Further, as the outer diameter d903 of the hypoid pinion 912 is reduced, the offset amount δ901 of the hypoid gear set HG9 is reduced. As a result, the positional relationship between the axis of the input shaft (ie, the motor shaft) 904 of the speed reducer 918 and the axis of the output shaft 914 differs from that of the 90 W second hypoid geared motor HG201 shown in FIG. The reduction gear casing 220 on the side of the two hypoid geared motors HG201 cannot be used in common, and the reduction gear casing 920 needs to be specially designed.
[0045]
In the example shown in FIG. 5, the necessity of this special design is used to further reduce the size of the reduction gear casing 920. However, rather than the effect of miniaturization of this part, a high-cost reduction gear casing 920 is separately designed and manufactured, and accordingly, the bearings 206, 208, 236, 238, and the oil seals 250, 252 are separately designed. -Manufacturing has a greater effect on cost increase (described later).
[0046]
On the other hand, in the first hypoid geared motor HG101 shown in FIG. 1, since the offset amount δ101 is set to be the same as that of the second hypoid geared motor HG201 (δ101 = δ201), the input shaft ( That is, the positional relationship between the motor shaft (104) and the output shaft 114 can be maintained the same between the respective geared motors HG101 and HG201. As a result, the reduction gear casings 120 and 220, the output shafts 114 and 214, the bearings 106, 206, 108 and 208, the oil seals 150 and 250, etc. are all provided with respect to the first hypoid geared motor HG101 and the second hypoid geared motor HG201. Can be shared. That is, the only difference between the first hypoid geared motor HG101 and the second hypoid geared motor HG201 is the hypoid gear sets S101 and S201.
[0047]
Further, in this embodiment, the motor casings 110 and 210 and the portions of the motor shafts 104 and 204 other than the portions where the hypoid pinions 112 and 212 are formed are shared (identical dimensions). . As a result, not only the entire casings 130 and 230 including the reduction gear casings 118 and 218 but also the bearings 136, 236, 138 and 238 supporting the motor shafts 104 and 204 can be shared. ing.
[0048]
Here, as is apparent from FIG. 1, the reduction gear casing 120 and the motor casing 110 of the first hypoid geared motor HG101 according to this embodiment are the same as the hypoid geared motor HG9 described in FIG. (D101 = D201> D901 and L103 = L203> L903). However, this is hardly a disadvantage when the usage situation of the “hypoid geared motor” is considered.
[0049]
That is, as described above, this type of hypoid geared motor is generally used to linearly drive a timing belt of an automatic door or a conveyor belt of a conveyor in a predetermined direction. Such an automatic door or conveyor generally has a relatively large space in the direction in which the timing belt or the transport belt moves (that is, the axial direction of the motor shaft). Therefore, it is assumed that the casing 130 (specifically, the axial length L103) of the 40 W first hypoid geared motor HG101 is set to be the same as the casing 230 (the coaxial length L203) of the 60 W second hypoid geared motor HG201. However, practically, there is almost no problem.
[0050]
The reduction gear casing 120 of the first hypoid geared motor HG101 is certainly not downsized like the reduction gear casing 920 of the hypoid geared motor HG9 shown in FIG. 5, but the axial projection of the motor casing 210 is performed. This is not a major disadvantage, as there is little deviation from the surface. Rather, since the positions and sizes of the mounting bolt holes 160a to 160d with respect to the other machine (automatic door, conveyor, or the like) are the same as the mounting bolt holes 260a to 260d of the second hypoid geared motor HG201, replacement mounting is possible ( (There is compatibility of mounting). This merit is that even if the motor capacity is changed, the first hypoid geared motor HG101 can be directly connected without interposing an adapter or the like in the mating machine or forming a new bolt hole or the like in the mating machine. It means that it can be attached, and is of great practical significance.
[0051]
That is, the series of the hypoid geared motor according to the present embodiment has almost no problems in practical use in consideration of the use application thereof or the installation condition, and most of the members including the casings 130 and 230 are not affected. This enables common use and ensures compatibility of mounting.
[0052]
Moreover, the 40 W first hypoid geared motor HG101 has the same offset amounts δ101 and δ201 as the 60W second hypoid geared motor HG201, and as a result, the 40W first hypoid geared motor HG101 has a 60W The engagement ratio is higher than that of the second hypoid geared motor HG201, and lower noise can be realized. Generally, when an attempt is made to use a motor with a smaller capacity, noise reduction is particularly required, so this qualitative tendency meets this requirement.
[0053]
Conversely, the 60 W second hypoid geared motor HG201 can realize more efficient driving because the engagement ratio is lower than that of the 40 W first hypoid geared motor HG101. Generally, when an attempt is made to use a motor having a larger capacity, a higher torque and higher efficiency are required. Therefore, this qualitative tendency also meets this requirement in this respect.
[0054]
In the above embodiment, not only the reduction gear casing, but also the entire casing including the motor casing is shared. However, in the present invention, the sharing of the motor casing is not necessarily required. It does not do. Further, the reduction gear casing and the motor casing do not necessarily have to be integrally formed, but may be a structure connected by bolts or the like.
[0055]
Further, in this embodiment, the ratio between the offset amount and the equivalent bevel gear cone distance of the hypoid gear is set to about 0.2 and 0.27, but this ratio is not particularly limited to this value. However, if the ratio is 0.5 or more, the efficiency is greatly reduced. Therefore, it is desirable to set the ratio to 0.5 or less. Further, when this ratio approaches 0, the meshing noise increases, and the original qualitative sound characteristics of the hypoid geared motor cannot be enjoyed. Therefore, it is desirable to set the ratio to 0.2 or more.
[0056]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, sharing of a member is promoted between individual hypoid geared motors which are the components of a series of hypoid geared motors, and as a result, a lower cost hypoid geared motor can be delivered in a short delivery time. Is obtained.
[Brief description of the drawings]
FIG. 1 shows an example of components of a series of hypoid geared motors according to an embodiment of the present invention, wherein (A) is a plan sectional view and (B) is a front sectional view.
FIGS. 2A and 2B show examples of other components of a series of hypoid geared motors according to an embodiment of the present invention, wherein FIG. 2A is a plan sectional view and FIG.
FIG. 3 is a cross-sectional view for explaining an equivalent bevel gear cone distance of the hypoid gear;
FIG. 4 is a closed sectional view showing a configuration of a conventional (single) hypoid geared motor.
5A and 5B show a design example when a hypoid geared motor of 40 W is designed by a conventional design method, wherein FIG. 5A is a closed sectional view, and FIG.
[Explanation of symbols]
HG101: 1st hypoid geared motor
HG201: 2nd hypoid geared motor
101, 102 ... motor
104, 204: motor shaft
110, 210 ... motor casing
112, 212 ... hypoid pinion
114, 214 ... output shaft
116, 216 ... hypoid gear
118, 218 ... reduction gear
120, 220 ... reduction gear casing
δ101, δ201 ... Offset amount
GL102, GL202 ... Equivalent bevel gear cone distance

Claims (6)

A motor, a hypoid pinion that rotates integrally with the motor shaft, a hypoid gear that meshes with the hypoid pinion in an offset state, an output shaft provided on the hypoid gear, a hypoid gear set including the hypoid pinion and the hypoid gear. A one-stage hypoid geared motor having a reduction gear casing accommodated therein,
A first hypoid gear set, and a selecting step of selecting one of the second hypoid gear sets having a different shape from the first hypoid gear set and having the same offset amount;
A first hypoid gear set and a preparation step of preparing a reduction gear casing capable of accommodating any of the second hypoid gear sets;
Accommodating the hypoid gear set selected in the selecting step in the reduction gear casing. A motor, a hypoid pinion that rotates integrally with the motor shaft of the motor, a hypoid gear that meshes with the hypoid pinion in an offset state, an output shaft provided on the hypoid gear, the hypoid pinion, and the hypoid gear. A series of one-stage hypoid geared motors having a reducer casing housing the hypoid gear set,
A first hypoid geared motor having a first hypoid gear set;
A second hypoid geared motor having a second hypoid gear set having a different shape but the same offset from the first hypoid gear set as a component of the series, and
A series of hypoid geared motors, wherein the reduction gear casing of the first hypoid geared motor and the reduction gear casing of the second hypoid geared motor have the same shape. In claim 2,
The first and second hypoid geared motors having the same offset amount, wherein both the hypoid pinion and the hypoid gear are different from each other, and the reduction ratio is the same. series. In claim 2 or 3,
The first and second hypoid geared motors having the same offset amount have a common casing that is the same including the casing of the motor, in addition to the reduction gear casing. A series of hypoid geared motors. In any one of claims 2 to 4,
The first and second hypoid geared motors having the same offset amount each have a mounting hole for the counterpart machine in the speed reducer casing, and the positions and sizes of the mounting holes are the same. Series of hypoid geared motors. In any one of claims 2 to 5,
The ratio between the offset amount of the first and second hypoid gear sets and the equivalent bevel gear cone distance of each hypoid gear of the first and second hypoid gear sets is both set to 0.5 or less. A series of hypoid geared motors characterized by:

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