JP2016129490A - Series of gear motors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress types of motors in all series by sharing the motors of respective fundamental series with different efficiency to constitute the respective fundamental series at a low cost.SOLUTION: Series of gear motors have: a plurality of types of gears G1 to G3 with different frame numbers; and a plurality of types of motors Ma to Me with different frame numbers, and constitutes a gear motor by connecting a gear (any of G1 to G3) with a specific frame number to any of the motors Ma to Me. The Series of gear motors includes: a fundamental series IE1 with low efficiency of motors Ma1 to Mc1; and a fundamental series IE2 with efficiency of motors Mb2 to Md2 higher than that of the fundamental series IE1, for example, the motor Mb1 to be connected to the gear G2 with a specific frame number 2 of the fundamental series IE1 is connected to the gear G1 with a frame number smaller than the specific frame number 2 of the fundamental series IE2, and used as the high efficiency motor Mb2 of the fundamental series IE2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a series of gear motors.

  A gear motor in which a motor that generates a driving force and a speed reducer (gear) that converts the rotational speed of the motor into a lower and stronger output torque is combined is widely used in many industrial machines and the like.

  This type of gear motor is usually seriesd so that various allowable torques (which can also be regarded as a concept of capacity and size) and various reduction ratios can be selected in consideration of user convenience (for example, Patent Document 1).

  FIG. 2 shows the configuration of a conventional typical gear motor series.

  The gear motor series shown in FIG. 2 includes a plurality of types of gears G1 to G5 (five types of 1 to 5 in the illustrated example) having different frame numbers set depending on an allowable torque (or capacity), and generation. A plurality of types of motors (standard motors) M1 to M5 having different frame numbers set depending on possible torque, and a gear G3 having a specific frame number (for example, frame number 3) selected from the motors. And a motor M3 are connected to form a gear motor GM3.

  Six kinds of reduction ratios R1 to R6 are prepared for the gears G1 to G5, respectively. After all, 5 × 6 = 30 kinds of gears having six kinds of reduction ratios are connected to each of the five kinds of frame number motors, so that a total of 30 kinds of gear motors are serialized. The user selects a gear motor having an arbitrary reduction ratio with an arbitrary allowable torque (or capacity) from among a plurality of types of gear motors prepared in this manner, alone or in one of other machines (for example, logistics machines). It will be used as a part.

Japanese Patent Laid-Open No. 10-110793 (FIG. 21)

  In recent years, IEC (International Electrotechnical Commission) 60034-2-1 that defines a calculation method of efficiency for a motor rotating at a constant speed was issued in 2007, and IEC 60034- that specifies an efficiency class using the calculation method. 30 was published in October 2008. Here, the efficiency class is a classification of efficiency reference values by class. From the highest efficiency, IE4 (super premium efficiency), IE3 (premium efficiency), IE2 (high efficiency), and IE1 (standard efficiency) are specified. ing.

  According to the trend of energy saving, the standard efficiency motor (IE1) is shown to be regulated in each country. However, the conventional IE1 type motor can be sold until the regulation is actually executed, and there is a user need because it is inexpensive. In addition, an IE1 type motor installed as a driving component of a driven device before the regulation needs to be stocked as a replacement part even after the regulation.

  This means that a motor manufacturer needs to prepare a plurality of types of motors having different efficiencies for motors having the same generated torque or capacity for a while. For IE2 to IE4 type motors, when trying to construct a basic series similar to the conventional one, three types of basic series as shown in FIG. "It must be built. In other words, the number of types of motors that must be prepared will increase four times compared to when the entire series was built using only conventional IE1 motors. Will be forced.

  The present invention was made to solve such problems, and by rationally sharing the motors of each basic series with different efficiencies, the types of motors in all the series are suppressed in total, As a result, it is an object to provide a low-cost gear motor in each basic series.

  The present invention has a plurality of types of gears having different frame numbers set depending on the allowable torque or capacity, and a plurality of types of motors having different frame numbers set depending on the generated torque or capacity, A gear motor series comprising a gear of a specific frame number selected from the motor and a motor, and constituting a gear motor, wherein the motor efficiency is lower than that of the first basic series. A motor including the second basic series having high efficiency and connected to the gear of the specific frame number of the first basic series is connected to a gear of a frame number smaller than the specific frame number of the second basic series. By adopting a configuration, the above-described problems are solved.

  In order to increase the efficiency of the motor, for example, (1) a motor using a magnet such as IPM or SPM; (2) changing the material (material) of a component such as a core or winding; (3) a coil Various methods are known, such as changing the thickness and winding method (slot shape) of the wire; and (4) suppressing the flowing current to be small. In the present invention, mainly focusing on the method (4), this is relatively grasped in relation to the concept of the frame number relating to torque or capacity.

  That is, the present invention captures the basic series of motors with different efficiencies in the form of a series of gear motors in which the motor and gears are connected, and the gears of a specific frame number in the first basic series The motor to be connected is configured to be connected to a gear having a frame number smaller than the specific frame number of the second basic series.

  According to the gear motor series according to the present invention, since the same motor can be shared by the low-efficiency basic series and the higher-efficiency basic series, the increase in the number of types of motors in all series is greatly suppressed. It is possible to drastically reduce the manufacturing cost and inventory cost of the entire series motor.

  By rationally sharing the motors of each basic series with different efficiencies, the types of motors in all the series can be suppressed in total, and as a result, a low-cost gear motor can be provided in each basic series.

The schematic diagram which shows the structural example of the series of the gear motor which concerns on embodiment of this invention. Schematic diagram showing an example configuration of a conventional gear motor series

  Hereinafter, an example of a series of gear motors according to an embodiment of the present invention will be described in detail based on the drawings.

  FIG. 1 is a schematic diagram illustrating a configuration example of a series of gear motors according to an embodiment of the present invention.

  In FIG. 1, the basic series IE1 in the leftmost column corresponds to a conventional standard gear motor series (FIG. 2). In addition, the basic series IE2 in the center row adopts a higher-efficiency motor than the IE1 motor, and the basic series IE3 in the rightmost row adopts a higher-efficiency motor, respectively. It corresponds. Here, only one type of each of the gears G1 to G3 is shown, but each of the gears G1 to G3 is developed at a plurality of reduction ratios as in the conventional case (FIG. 2).

  The basic series IE1 of standard efficiency is generated with a plurality of types of gears G1 to G3 (three types of 1 to 3 in this example) having different frame numbers set depending on the allowable torque (including the concept of capacity) There are a plurality of types of motors Ma1 to Mc1 (three types of 1 to 3 in this example) having different frame numbers set depending on torque (including the concept of capacity). A gear G1 of a specific frame number (for example, frame number 1) selected from them and a motor (in this case, motor Ma1) (in this case, frame number 1) are connected to form a gear motor G1 and Ma1. The system of this basic series is the same as before.

  In the high efficiency basic series IE2, the relationship between the gears G1 to G3 and the motors Mb2, Mc2 and Md2 in the basic series IE2 is the same as that in the basic series IE1, and as a result, the gear motors G1 · Mb2, G2 · Mc2, and G3・ Md2 is in series.

  Further, the higher-efficiency basic series IE3 also has the same relationship between the gears G1 to G3 and the motors Mc3, Md3, and Me3 in the basic series IE3, and as a result, the gear motors G1, Mc3, G2,. Md3 and G3 / Me3 are serialized.

  The gears G1 to G3 are common to the basic series IE1 to IE3. In this example, three frame numbers of 1 to 3 are prepared for each basic series, and the transmission torque (capacity) sequentially increases in this order. Each gear G1 to G3 has a larger allowable torque as the frame number increases (G1 <G2 <G3). That is, the transmission torque (capacity) of frame number 1 is the smallest, and the transmission torque (capacity) of frame number 3 is the largest. Therefore, the magnitude of the allowable torque of the gears G1 to G3 is G1 <G2 <G3.

  Here, in the reference numerals attached to the motors, the lower case alphabet at the center indicates the type of motor, and the last number indicates the efficiency category. That is, for example, Mc1, Mc2, and Mc3 that are present in each basic series are the same motor whose motor is Mc (the same detailed definition will be described later), the motor Mc1 is IE1, the motor Mc2 is IE2, and the motor Mc3 means that the standard conditions of IE3 are satisfied.

  The generated torque (or capacity) of each motor increases as the frame number increases. Therefore, the magnitude of the generated torque of each motor is in accordance with the frame number in each basic series, Ma1 <Mb1 <Mc1, Mb2 <Mc2 <Md2, and Mc3 <Md3 <Me3.

  In order to connect the gears G1 to G3 having different sizes and the respective motors, joint covers Ka1 to Kc1, Ka2 to Kc2, and Ka3 to Kc3 are disposed between the gears G1 to G3 and the respective motors. The joint covers Ka1 to Kc1, Ka2 to Kc2, and Ka3 to Kc3 are superior to the gears G1 to G3 and the motor as a joint cover, but are not necessarily independent members. You may make it give the function as the said joint cover to the load side cover of a motor, or the anti-load side cover of the gears G1-G3.

  As is apparent from FIG. 1, in this gear motor series, a motor connected to a gear of a specific frame number of the basic series IE1 is connected to a gear of a frame number smaller than the specific frame number of the basic series IE2. You can see that

  For example, the motor Mb1 connected to the gear G2 of the specific frame number 2 of the basic series IE1 is connected to the gear G1 of the frame number 1 (which is smaller than the specific frame number 2) of the basic series IE2. It is used as the motor Mb2 of the basic series IE2. The motor Mc1 connected to the gear G3 of the specific frame number 3 of the basic series IE1 is connected to the gear G2 of the frame number 2 (which is smaller than the specific frame number 3) of the basic series IE2. It is used as the motor Mc2 of the basic series IE2.

  The motor Mc2 of the basic series IE2 is further connected to the gear G1 of the frame number 1 (which is smaller than the specific frame number 2) of the basic series IE3 to form a motor Mc3 of the basic series IE3. It is used. This can be seen from the relationship between the motor Mc3 of the basic series IE3 and the motor Mc1 of the basic series IE1, and the motor Mc1 connected to the gear G3 of the specific frame number 3 of the basic series IE1 is ( It is also connected to the gear G1 of the frame number 1 (which is a frame number smaller than the specific frame number 3) and used as the motor Mc3 of the basic series IE3.

  When a motor Mb1 connected to a specific frame number of the basic series IE1, for example, a gear G2 of the frame number 2, is connected to a gear G1 of a frame number 1 smaller than the specific frame number 2 of the basic series IE2. Is used as the motor Mb2 of the basic series IE2, and is therefore used as a motor having a (rated) capacity smaller than the (rated) capacity when used as the motor Mb1 of the basic series IE1. Therefore, the (rated) capacity to be used as the motor Mb2 of the basic series IE2 is displayed on the nameplate of the motor Mb2.

  For example, when used as the motor Mb1 of the basic series IE1, it is used with a rated capacity of 1.5 kW. Therefore, when used as the motor Mb2 of the basic series IE2, it is 0.75 kW when used as the motor Mb2 of the basic series IE2. 0.75kw is displayed on the nameplate. At this time, efficiency such as IE1 and IE2 may be displayed in addition to the rated capacity. In addition, the display position of a rated capacity is not limited to a nameplate, and should just be displayed in the location of the motor. The display method is not limited to directly displaying the rated capacity, and may be a color or a symbol associated with each rated capacity in advance, for example, as long as the rated capacity can be identified.

  If necessary, the motor is shared in this embodiment (the motor is the same), but it is only connected to a hardware component, for example, a casing (more precisely, to the load side cover of the casing). In the case of providing a function as a cover, the casing is a casing other than the joint cover), a rotor, a stator, a motor shaft, a bearing, an oil seal, and the like. These hardware components are completely shared, including the materials.

  However, the configuration of the electrical system and the control system is such that when each motor is connected to a power source, for example, the motor Mb1 ensures the torque characteristics required for the motor of frame number 2 of the basic series IE1, In the motor Mb2, the flowing current and the like are adjusted so as to ensure the torque characteristics required for the motor of frame number 1 of the basic series IE2. Specifically, when used as the motor Mb1 of the basic series IE1, a large current (similar to the conventional one) is passed so that the torque required by the frame number 2 is generated, while the motor Mb2 of the basic series IE2 When it is used, it is sufficient if the torque required by the frame number 1 can be generated. Therefore, it is designed so that a current suppressed to a lower level flows. In other words, this “suppressing the current to flow” is a major factor that allows the motor Mb1 to be used as the motor Mb2.

  As described above, the “frame number” is originally classified based on the concept of “torque (or capacity)” and does not correspond to the efficiency classification. Therefore, for example, even if the motor Mb1 combined with the gear G2 of the frame number 2 is simply combined with the gear G1 of the frame number 1 smaller by one class, the motor Mb1 does not immediately function as an IE2 motor.

  Therefore, in the present embodiment, it is essential to make the efficiency of the motors Ma to Me match the standards of IE2 to IE3 that are actually used. However, this work is specifically as described above: (1) A motor using a magnet such as IPM or SPM; (2) Materials of materials of materials such as cores and windings (3) Change the coil winding thickness, winding method (slot shape), etc .; (4) Keep current flowing small; etc. It is not a property of increasing. Naturally, development should be performed so as to satisfy the standards required in each of the basic series IE2 to IE3 while suppressing an increase in cost as much as possible. However, in the case of this embodiment, already (4) Since the method is “adopted”, the development load by the methods (1) to (3) tends to be small, and the implementation of the standards of the basic series IE2 to IE3 is rather easy.

  According to the series of gear motors according to this embodiment, in the configuration example of FIG. In fact, the number of frame numbers in each basic series is often around 10, so motors with exactly the same hardware configuration can be used in common between basic series with different efficiencies. Motor manufacturing costs and inventory costs can be drastically reduced. In the inventor's test, if a frame number of a certain basic series using the motors Ma to Me is used to satisfy the standard required for the basic series, excessive quality is not achieved with a frame number of another basic series. (Which is much higher than the required efficiency). However, excessive quality does not basically cause a problem even if it improves the reliability of the manufacturer, but the advantage of using the same hardware configuration between different basic series is greater. .

  In the above embodiment, the series configuration examples of the basic series IE1 to IE3 are shown, but it is of course possible to develop and apply the present technical idea to the basic series IE4.

  In the above-described embodiment, in the case of a basic series with an efficiency different by one rank, a motor with the same hardware configuration is combined with a gear that is smaller by one rank of the frame number, and the basic series with an efficiency different by two ranks. In this case, a motor having the same hardware configuration is combined with a gear whose frame number is smaller by two ranks. However, in the present invention, the shift of the rank of the basic series and the rank of the frame number does not necessarily have to be related to each other. For example, the rank of the basic series such as between the basic series IE1 and IE2 or between IE2 and IE3. Even if only one rank is different, it may be combined with a gear whose frame number is two ranks or smaller than three ranks. When the number of frame numbers is large and the difference between the core frame numbers is small, such a method of combining with gears having different frame numbers of two ranks or more may be effective.

  On the other hand, in the case of a motor used in three or more basic series such as the motor Mc, for example, if the basic series becomes excessive quality, even if the basic series is different in two ranks, The frame number may be shifted by one rank. In this case, for the basic series which inevitably differs only in one rank, the same motor is used as it is for the gear of the same frame number, but this is not prohibited in the present invention (in this example, two ranks are different). The present invention is only applied between basic series). As described above, the present invention only needs to be implemented in a part of the entire series, and the entire gear motor series does not necessarily have to be constructed in a single shift relationship.

IE1 ... Basic series of standard efficiency IE2 ... Basic series of high efficiency IE3 ... Basic series of higher efficiency Ma1-Mc1 ... Motor of basic series IE1 Mb2-Md2 ... Motor of basic series IE2 Mc3-Me3 ... Motor of basic series IE3 Ka1 ~ Kc1, Ka2 ~ Kc2, Ka3 ~ Kc3 ... Cover cover

Claims (5)

There are multiple types of gears with different frame numbers set depending on the allowable torque or capacity, and multiple types of motors with different frame numbers set depending on the generated torque or capacity. A series of gear motors that constitute a gear motor by connecting a gear with a specific frame number and a motor,
Including the first basic series with low motor efficiency and the second basic series with higher motor efficiency than the first basic series,
A series of gear motors, wherein a motor connected to the gear of the specific frame number of the first basic series is connected to a gear of a frame number smaller than the specific frame number of the second basic series. In claim 1,
When the motor of the specific frame number of the first basic series is connected to a gear of a frame number smaller than the specific frame number of the second basic series, the motor is used in the first basic series. A series of gear motors characterized by being used as motors with a rated capacity smaller than the rated capacity when used. In claim 2,
When the motor of the specific frame number of the first basic series is connected to a gear of a frame number smaller than the specific frame number of the second basic series,
A rated capacity to be used as the motor of the second basic series is displayed in an identifiable manner on the motor. A series of gear motors. In any one of Claims 1 thru | or 3,
In addition, the third basic series, which has higher motor efficiency than the second basic series,
The gear motor series, wherein the motor of the specific frame number of the second basic series is connected to a gear of a frame number smaller than the specific frame number of the third basic series. In claim 4,
A series of gear motors characterized in that the motor of the specific frame number of the first basic series is connected to a gear of a frame number smaller than the specific frame number of the third basic series.

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