CN113286484A - Drive device - Google Patents

Abstract

The invention provides a driving device, which can inhibit the electronic components arranged in the airflow path from obstructing the airflow and improve the cooling efficiency of the heating components. The drive device (1) is characterized by comprising: a housing (2) having an air inlet (22) and an air outlet (23); a fan (3) which is provided in an airflow path that is a path of an airflow from the air inlet (22) to the air outlet (23) and which blows air to the heat-generating component (6); and a plurality of electronic components disposed between the air inlet (22) and the fan (3) in the airflow path, wherein the electronic components include a plurality of capacitors (4), the plurality of capacitors (4) are arranged in parallel in an arrangement direction intersecting a downstream direction (F1) in the airflow path from the air inlet (22) to the air outlet (23), and the capacitors (4) are arranged at non-uniform intervals in the arrangement direction.

Description

Drive device

Technical Field

The present invention relates to a drive device.

Background

Currently, various driving devices are used. Among such driving devices, there is a driving device including a heat generating component such as a substrate and a fan for cooling the heat generating component in an airflow path from an air inlet to an air outlet. For example, patent document 1 discloses a drive device including a mounting board and a fan in an airflow path from an intake port to an exhaust port.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-190921

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional drive device as shown in patent document 1, electronic components such as a capacitor may be provided in the airflow path. When a plurality of such electronic components are provided, the electronic components may obstruct airflow depending on the arrangement, and the cooling efficiency of the fan with respect to the heat generating component may be lowered. In a configuration in which a plurality of electronic components are arranged along an airflow path, the temperature of the airflow may increase drastically depending on the number of electronic components, and the cooling efficiency of the heat generating component by the fan may decrease. Therefore, an object of the present invention is to suppress the electronic components disposed in the airflow path from obstructing the airflow and to improve the cooling efficiency of the heat generating component.

Technical scheme for solving technical problem

The driving device of the present invention is characterized by comprising: a housing having an air intake and an air exhaust; a fan that is provided in an airflow path that is a path of an airflow from the air inlet to the air outlet and that supplies air to a heat-generating component; and a plurality of electronic components provided between the air inlet and the fan in the airflow path, wherein the driving device includes a plurality of capacitors as the electronic components, the plurality of capacitors are arranged side by side in an arrangement direction intersecting a downstream direction of the airflow path from the air inlet to the air outlet, and intervals between the capacitors in the arrangement direction are not uniform.

According to this aspect, since the plurality of capacitors are arranged side by side in the arrangement direction intersecting the downstream direction, a local temperature rise in the air flow can be suppressed. Further, since the capacitors are arranged at uneven intervals in the array direction, the airflow can efficiently pass through the wide-interval portion, and the air introduced from the air inlet can be efficiently supplied to the heat-generating component. Therefore, the electronic components disposed in the airflow path can be prevented from obstructing the airflow, and the cooling efficiency of the heat generating component can be improved.

In the driving device according to the present invention, a plurality of relay circuits may be provided as the electronic component, the plurality of relay circuits may be arranged side by side along the arrangement direction, and the intervals between the relay circuits may be arranged unevenly in the arrangement direction as compared with a case where the intervals between the relay circuits are set to be even, so that an overlapping amount of the intervals between the relay circuits and the intervals between the capacitors may be increased. If a plurality of relay circuits are provided in such a configuration, the relay circuits can be suppressed from obstructing the airflow in the airflow path.

In the driving device of the present invention, the capacitor may have a first relatively narrow spacer portion and a second relatively wide spacer portion as a space therebetween, and the fan may be disposed in an arrangement overlapping the second spacer portion in the arrangement direction. If the fan is provided in such an arrangement, the air introduced from the air inlet can be efficiently supplied to the heat generating component.

In the driving device according to the present invention, the electronic component may include a plate-like member disposed such that a maximum area surface of the plate-like member does not face the downstream direction. If the plate-like member is provided in such an arrangement, the plate-like member can be suppressed from obstructing the airflow in the airflow path.

In the driving device of the present invention, the electronic component may include a first electronic component and a second electronic component of different types, and the first electronic component and the second electronic component may be fixed to a common sheet metal member with a space therebetween. By fixing the first electronic component and the second electronic component to the common sheet metal member, the device structure can be simplified, and heat generated in the first electronic component and the second electronic component can be efficiently transferred by the sheet metal member made of metal having a high thermal conductivity. In addition, by fixing the first electronic component and the second electronic component with a gap therebetween, the heat transfer between the first electronic component and the second electronic component can be suppressed.

Effects of the invention

The driving device of the invention can inhibit the electronic components arranged in the airflow path from obstructing the airflow and improve the cooling efficiency of the heating components.

Drawings

Fig. 1 is a schematic perspective view of a driving device according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a driving device according to an embodiment of the present invention, viewed from a different angle from fig. 1.

Fig. 3 is a schematic front view of the drive device according to the embodiment of the present invention in a state where a part of the housing is detached from the state of fig. 1.

Fig. 4 is a schematic front view of the driving device according to the embodiment of the present invention in a state where a part of the fan is detached from the state of fig. 3.

Fig. 5 is a schematic front view of the driving device according to the embodiment of the present invention in a state where a part of the components such as the relay circuit is further removed from the state of fig. 4.

Fig. 6 is a schematic perspective view of the driving device according to the embodiment of the present invention in a state where a part of the housing is detached from the state of fig. 1.

Fig. 7 is a schematic perspective view of the driving device according to the embodiment of the present invention in a state where the mounting portion of the cooling fan is removed from the state of fig. 6.

Fig. 8 is a schematic front view showing the arrangement of a relay circuit and an inrush current preventing resistor in the drive device according to the embodiment of the present invention.

Description of the reference numerals

1 … driving device; 2 … shell; 2a … first upper surface housing portion; 2b … first side housing part; 2c … second side housing portion; 2d … first front housing part; 2e … first rear housing part; 3 … fan; 3a … suction fan; 3Aa … first suction fan; 3Ab … second suction fan; 3Ac … third suction fan; 3B … back side cooling fan; 3Ba … first backside cooling fan; 3Bb … second backside cooling fan; 3Bc … third backside cooling fan; 3Bd … fourth backside cooling fan; 3C … surface cooling fans; 3Ca … first surface cooling fan; 3Cb … second surface cooling fan; 3Cc … third surface cooling fan; 3Cd … fourth surface cooling fan; 4 … capacitor; 4a … first capacitor; 4b … second capacitor; 4c … third capacitor; 4d … fourth capacitor; 4e … fifth capacitor; 4f … sixth capacitor; a 4g … seventh capacitor; 4h … eighth capacitor; 5 … common mounting part; 6 … control board (heat generating component, electronic component); 6a … first control substrate; 6b … second control substrate; 6c … third control substrate; 6d … fourth control substrate; 8 … relay circuit (electronic part, first electronic part); 8a … first relay circuit; 8b … second relay circuit; 8c … third relay circuit; 9 … inrush current prevention resistor fixing part; 10 … inrush current protection resistor (electronic component, second electronic component); 11 … sheet metal parts; 12a … first substrate holding part (electronic component); 12B … second substrate holding part (electronic component); 13 … substrate (electronic component); 19 … relay circuit fixing part.

Detailed Description

Hereinafter, a driving device 1 for controlling an industrial robot will be described with reference to fig. 1 to 8 as an embodiment of the driving device of the present invention. However, the driving device of the present invention is not limited to a driving device for controlling an industrial robot. Here, the X-axis direction in the drawing is a horizontal direction, the Y-axis direction is a vertical direction, and the Z-axis direction is a horizontal direction perpendicular to the X-axis direction.

< integral Structure >

First, the overall configuration of the drive device 1 will be described. As shown in fig. 1 and 2, the outside of the drive device 1 is covered with a casing 2. A plurality of air vents 21 are provided in the housing 2 to allow air to move between the inside and outside of the drive device 1.

Fig. 1 and 2 show a state in which all the housing portions constituting the housing 2 are mounted. As shown in fig. 1 and 2, the case 2 includes a first upper case 2a, a first side case 2b, a second side case 2c, a first front case 2d, a first rear case 2e, and the like. On the other hand, fig. 3 to 5 show the case 2 with the first front housing part 2d removed. Fig. 6 and 7 show a state in which the first side case 2b and the second side case 2c are removed in addition to the first front case 2 d.

As shown in fig. 3 to 7, a plurality of fans 3 are provided inside the drive device 1. The fan 3 provided at a position facing the air vent 21 of the first front housing portion 2d is an intake fan 3A that takes in air from the outside to the inside of the drive device 1. The fan 3 provided at a position facing the air vent 21 of the first rear housing part 2e is a rear cooling fan 3B that discharges air from the inside to the outside of the drive device 1. The fan 3 provided at a position facing the first side casing portion 2b is a surface cooling fan 3C that generates an air flow toward the control board 6.

As shown in fig. 2, in the drive device 1 of the present embodiment, the vent 21 on the first rear case portion 2e side in the case 2, which discharges air from the inside to the outside of the drive device 1, constitutes an exhaust port 23. As shown in fig. 1, the air inlet 22 is formed by the air port 21 of the first front housing portion 2d of the housing 2 facing the side where the air outlet 23 is formed. In the present specification, the direction of the airflow from the surface of the case 2 on the first front case portion 2d side where the air inlet 22 is formed toward the surface of the case 2 on the first rear case portion 2e side where the air outlet 23 is formed is defined as the forward flow direction F1, and the direction opposite to the forward flow direction F1 is defined as the backward flow direction F2. The forward direction F1 is a direction substantially along the Z-axis direction, although its direction slightly changes as it goes from the upstream side to the downstream side due to various components provided inside the drive device 1. In addition, the backward flow direction F2 is a direction substantially along the Z-axis direction, as in the forward flow direction F1.

Various components are disposed in an airflow path, which is a path of an airflow from the air inlet 22 to the air outlet 23. The following mainly describes the arrangement of the constituent members in detail. The drive device 1 of the present embodiment includes the air inlet 22 and the air outlet 23 at a plurality of locations, and has a plurality of airflow paths, which are paths of airflow from the air inlet 22 to the air outlet 23. Next, an air flow path in which a control board 6 as an example of a heat generating component and a surface cooling fan 3C that cools the control board 6 are arranged will be described.

< suction fan >

As shown in fig. 3, 6, and 7, the drive device 1 of the present embodiment includes an intake fan 3A in its airflow path. The number of the intake fans 3A is three in total at positions facing the air vents 21 provided in the first front case 2d as the air inlets 22. By driving the intake fan 3A, air can be introduced into the interior of the casing 2 through the intake port 22.

< plate-like Member >

As shown in fig. 3 to 7, the driving device 1 of the present embodiment is provided with a plurality of plate-like members as plate-like electronic components in its airflow path. Specifically, the first substrate holding portion 12A, the second substrate holding portion 12B, the substrate 13, the inrush current preventing resistor 10, and the like are provided. The inrush current prevention resistor 10 is a resistor for suppressing an excessive current from being supplied to various substrates such as the control substrate 6 when the power supply is turned on. As shown in fig. 3 to 7, the maximum area of the plate-like members, which is the area having the largest area, is parallel to the downstream direction F1. In other words, these plate-like members are each disposed in an arrangement in which the maximum area does not face the forward flow direction F1. Therefore, the plate-like members are suppressed from obstructing the airflow in the airflow path. If the inhibition of the air flow can be suppressed, the retention of the air flow having a temperature increased in the apparatus can be suppressed. The term "not to face" as used herein means that the substrates are not necessarily parallel to each other, but may be slightly inclined with respect to the parallel.

< Relay circuit >

As shown in fig. 3 and 4, the drive device 1 of the present embodiment includes a plurality of relay circuits 8 in its airflow path. Specifically, three relay circuits 8, i.e., a first relay circuit 8a, a second relay circuit 8b, and a third relay circuit 8c, are provided. The relay circuit 8 is a circuit for supplying power to various boards such as the control board 6. The three relay circuits 8 are arranged side by side in the Y-axis direction intersecting the downstream direction F1, but as shown in fig. 4, the interval G1a between the first relay circuit 8a and the second relay circuit 8b is longer than the interval G1b between the second relay circuit 8b and the third relay circuit 8 c. The reason why the intervals between the three relay circuits 8 are not uniform like this is described later.

< capacitor >

As shown in fig. 4 to 7, the driving device 1 of the present embodiment includes a plurality of capacitors 4 in its airflow path. Specifically, eight capacitors 4, i.e., a first capacitor 4a, a second capacitor 4b, a third capacitor 4c, a fourth capacitor 4d, a fifth capacitor 4e, a sixth capacitor 4f, a seventh capacitor 4g, and an eighth capacitor 4h, are provided. The capacitor 4 is an electronic component that stores and discharges electric power, and has one terminal connected to a power supply, not shown, and the other terminal grounded. Eight capacitors 4 are arranged side by side along the Y-axis direction intersecting the downstream direction F1, but as shown in fig. 5, the interval G2a between the first capacitor 4a and the second capacitor 4b is slightly wide, the interval G2b between the second capacitor 4b and the third capacitor 4c is narrow, the interval G2c between the third capacitor 4c and the fourth capacitor 4d is wide, the interval G2d between the fourth capacitor 4d and the fifth capacitor 4e is narrow, the interval G2e between the fifth capacitor 4e and the sixth capacitor 4F is slightly wide, the interval G2F between the sixth capacitor 4F and the seventh capacitor 4G is narrow, and the interval G2G between the seventh capacitor 4G and the eighth capacitor 4h is wide. The reason why the intervals of the eight capacitors 4 are not uniform like this is described later.

< control substrate >

As shown in fig. 7, the drive device 1 of the present embodiment includes a plurality of control boards 6 as control units for moving the arms of the industrial robot on the airflow path. Specifically, four control boards, i.e., a first control board 6a, a second control board 6b, a third control board 6c, and a fourth control board 6d, may be provided as the plurality of control boards 6. The four control boards 6 are provided corresponding to the movement direction of the arm of the industrial robot.

< Cooling Fan >

As described above, the control board 6 functions as a control unit for moving the arm of the industrial robot, and generates heat due to the formation of heat generating components such as a resistive element, not shown. Therefore, as shown in fig. 5 to 7, a plurality of surface cooling fans 3C are provided, and the surface cooling fans 3C are configured to suppress temperature increase of the control board 6 by blowing air to the surface of the control board 6. Specifically, four surface-cooling fans, i.e., a first surface-cooling fan 3Ca, a second surface-cooling fan 3Cb, a third surface-cooling fan 3Cc, and a fourth surface-cooling fan 3Cd, are provided. The first surface cooling fan 3Ca is a surface cooling fan 3C capable of blowing air toward the first control board 6a, the second surface cooling fan 3Cb is a surface cooling fan 3C capable of blowing air toward the second control board 6b, the third surface cooling fan 3Cc is a surface cooling fan 3C capable of blowing air toward the third control board 6C, and the fourth surface cooling fan 3Cd is a surface cooling fan 3C capable of blowing air toward the fourth control board 6 d. The four surface cooling fans are all mounted to the inside of the apparatus by one constituent member through the common mounting portion 5, but the four surface cooling fans may be independently mounted to the inside of the apparatus through separate mounting portions.

In the drive device 1 of the present embodiment, the control board 6 is arranged in a direction parallel to the Z-axis direction in plan view. The front surface cooling fan 3C is disposed obliquely with respect to the Z-axis direction in plan view. Therefore, the flow direction of the airflow formed by the surface cooling fan 3C is inclined with respect to the control substrate 6, and the airflow reaching the control substrate 6 is directed in the downstream direction F1 along the control substrate 6. By arranging the front surface cooling fan 3C in this manner, the air flow blown from the front surface cooling fan 3C toward the control board 6 is less likely to stay in the drive device 1 of the present embodiment, and the cooling efficiency is improved.

< Cooling Fan >

As shown in fig. 4 and 5, the driving device 1 of the present embodiment includes a plurality of back surface cooling fans 3B in its airflow path. Specifically, as the rear surface cooling fan 3B, four rear surface cooling fans, i.e., a first rear surface cooling fan 3Ba, a second rear surface cooling fan 3Bb, a third rear surface cooling fan 3Bc, and a fourth rear surface cooling fan 3Bd, are provided in common at positions facing the air vents 21 provided in the first rear surface case portion 2e as the air outlet 23. By driving the rear surface cooling fan 3B, the air heated by the heat radiation plate disposed on the rear surface of the control board 6 can be efficiently discharged to the outside of the case 2 through the air outlet 23.

< configuration of capacitor >

Next, the reason why the capacitors 4 are arranged side by side in the Y-axis direction intersecting the downstream direction F1 and the intervals between the capacitors 4 are not uniform in the driving device 1 of the present embodiment will be described. The reason why the capacitors 4 are arranged in parallel in the Y-axis direction is that, when the capacitors 4 are arranged in parallel in the downstream direction F1, only the vicinity of the capacitors 4 is locally heated while the airflow from the air inlet 22 to the air outlet 23 flows in the downstream direction F1, and the cooling efficiency of the capacitors 4, the control board 6, and the like, which are heat generating components, is lowered.

The reason why the intervals between the capacitors 4 are not uniform is that the airflow can efficiently pass through the portion where the interval between the adjacent capacitors 4 is wide, and the air introduced from the air inlet 22 can be efficiently supplied to the heat generating component. For example, as shown in fig. 5, in the drive device 1 of the present embodiment, when viewed from the downstream direction F1, the first back side cooling fan 3Ba can be seen from the widely spaced interval G2a (the interval G2a overlaps the position of the first back side cooling fan 3 Ba), the second back side cooling fan 3Bb can be seen from the widely spaced interval G2c, the third back side cooling fan 3Bc can be seen from the widely spaced interval G2e, and the fourth back side cooling fan 3Bd can be seen from the widely spaced interval G2G. Therefore, it can be said that the air blowing efficiency from the air inlet 22 to the control board 6 by each back surface cooling fan 3B is improved.

In addition, for example, as shown in fig. 5, in the drive device 1 of the present embodiment, when viewed from the downstream direction F1, the positions of the widely-spaced intervals G2a and the first surface cooling fan 3Ca overlap, the positions of the widely-spaced intervals G2c and the second surface cooling fan 3Cb overlap, the positions of the widely-spaced intervals G2e and the third surface cooling fan 3Cc overlap, and the positions of the widely-spaced intervals G2G and the fourth surface cooling fan 3Cd overlap. Therefore, it can be said that the air blowing efficiency from the air inlet 22 to the surface cooling fans 3C is improved. By forming such a structure, the driving device 1 of the present embodiment suppresses the capacitor 4 provided in the airflow path from obstructing the airflow, and improves the cooling efficiency of the control substrate 6.

If it is said in other words to the above, in the driving device 1 of the present embodiment, as the intervals between the capacitors 4, there are the first relatively narrow interval part (interval G2b, interval G2d, interval G2f) and the second relatively wide interval part (interval G2a, interval G2c, interval G2e, interval G2G), and the fan 3 is disposed in such a configuration as to overlap the second interval part in the arrangement direction along the Y-axis direction. By arranging the fan 3 in this manner, the drive device 1 of the present embodiment can efficiently supply the air introduced from the air inlet 22 to the control board 6 or the like as the heat generating component.

< configuration of Relay Circuit >

Next, the reason why the relay circuits 8 are arranged side by side in the Y-axis direction intersecting the downstream direction F1 and the intervals between the relay circuits 8 are not uniform in the driving device 1 of the present embodiment will be described. The reason why the relay circuits 8 are arranged in the Y-axis direction is that, when the relay circuits 8 are arranged in the downstream direction F1, the temperature of the air flow from the air inlet 22 to the air outlet 23 is locally increased by the heat of the relay circuits 8, and the cooling efficiency of the relay circuits 8, the capacitors 4, the control board 6, and the like, which are heat generating components, is lowered.

In addition, the reason why the intervals of the relay circuits 8 are not uniform is because the amount of overlap of the intervals between the capacitors 4 and the intervals between the relay circuits 8 is increased as viewed in the downstream direction F1 shown in fig. 4. In other words, the intervals between the relay circuits 8 are unevenly arranged in the Y-axis direction, as compared with the case where the intervals between the relay circuits 8 are evenly arranged, so that the overlapping amount of the intervals between the relay circuits 8 and the intervals between the capacitors is increased. If a plurality of relay circuits 8 are provided in such a configuration, the relay circuits 8 can be suppressed from obstructing the airflow in the airflow path.

In addition, as shown in fig. 8, the relay circuit 8 is spaced apart from the sheet metal part 11 by a gap G3 and fixed to the sheet metal part 11 by the relay circuit fixing portion 19. Further, the inrush current prevention resistor 10 is also fixed to the sheet metal member 11 at an interval G4. Specifically, the inrush current prevention resistor 10 is fixed to the relay circuit 8 by the inrush current prevention resistor fixing part 9, and thereby is indirectly fixed to the sheet metal member 11.

If the above is stated in other words, in the drive device 1 of the present embodiment, there are different types of the relay circuit 8 as the first electronic part and the inrush current prevention resistance 10 as the second electronic part, and the relay circuit 8 and the inrush current prevention resistance 10 are each fixed to the common sheet metal member 11 in a state of being spaced apart. By fixing the relay circuit 8 and the inrush current preventing resistor 10 to the common sheet metal member 11 in this manner, the device structure can be simplified, and heat generated in the relay circuit 8 and the inrush current preventing resistor 10 can be efficiently transferred by the metal sheet metal member 11 having a high thermal conductivity. Further, by fixing the relay circuit 8 and the inrush current prevention resistor 10 in a state of being spaced apart from each other, it is possible to suppress heat transfer between the relay circuit 8 and the inrush current prevention resistor 10.

The driving device 1 of the present embodiment includes, as heat generating components and electronic components, the capacitor 4, the control board 6, the relay circuit 8, the inrush current preventing resistor 10, the first board holding portion 12A, the second board holding portion 12B, and the board 13, but is not limited to such a configuration. The heat generating component and the electronic component may include components and parts other than those described above, or may not include some of the components and parts described above. In the driving device 1 of the present embodiment, the electronic components also serve as the heat generating components, but the electronic components may not also serve as the heat generating components.

As described above, the present invention is not limited to the above-described embodiments, and can be realized in various configurations without departing from the gist thereof. For example, in order to solve part or all of the above-described technical problems or to achieve part or all of the above-described effects, technical features in embodiments corresponding to technical features in the respective aspects described in the summary of the invention may be appropriately replaced or combined. In addition, if the technical feature is not necessarily described in the present specification, it may be deleted as appropriate.

Claims (5)

1. A drive device is characterized by comprising:

a housing having an air intake and an air exhaust;

a fan that is provided in an airflow path that is a path of an airflow from the air inlet to the air outlet, and that supplies air to a heat-generating component; and

a plurality of electronic parts provided at a position between the air suction port and the fan in the airflow path,

having a plurality of capacitors as the electronic parts,

the plurality of capacitors are arranged side by side in an arrangement direction intersecting a downstream direction of the airflow path from the air inlet toward the air outlet,

the capacitors are not uniformly spaced from each other in the arrangement direction.

2. The drive device according to claim 1,

a plurality of relay circuits are provided as the electronic parts,

a plurality of the relay circuits are arranged side by side along the arrangement direction,

the intervals of the relay circuits are arranged unevenly in the arrangement direction, so that the overlapping amount of the intervals of the relay circuits and the intervals of the capacitors increases, as compared with a case where the intervals of the relay circuits are set to be even.

3. The drive device according to claim 1 or 2,

as a spacing of the capacitors from each other, having a first relatively narrow spacing portion and a second relatively wide spacing portion,

the fan is disposed in a configuration overlapping the second spacer portion in the arrangement direction.

4. The drive device according to any one of claims 1 to 3,

the electronic component includes a plate-like member,

the plate-like member is disposed such that a maximum area surface of the plate-like member does not face the downstream direction.

5. The drive device according to any one of claims 1 to 4,

as the electronic parts, there are different types of first electronic parts and second electronic parts,

the first electronic part and the second electronic part are each fixed to a common sheet metal member in a state of being spaced apart.

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