CN113286484B - Driving device - Google Patents

Abstract

The invention provides a driving device, which can inhibit electronic components arranged in an airflow path from blocking airflow and improve cooling efficiency of heating components. The driving device (1) is characterized by comprising: a housing (2) having an air inlet (22) and an air outlet (23); a fan (3) provided in an airflow path, which is a path of airflow from the air inlet (22) to the air outlet (23), and configured to supply air to the heat generating component (6); and a plurality of electronic components provided at a position between the air inlet (22) and the fan (3) in the air flow path, wherein the plurality of electronic components are provided with a plurality of capacitors (4), the plurality of capacitors (4) are arranged side by side in an arrangement direction intersecting a downstream direction (F1) from the air inlet (22) to the air outlet (23) in the air flow path, and the interval between the capacitors (4) in the arrangement direction is uneven.

Description

Driving device

Technical Field

The present invention relates to a driving device.

Background

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

Prior art literature

Patent literature

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

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional driving device as disclosed in patent document 1, an electronic component 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 the air flow, and the cooling efficiency of the fan for the heat generating component may be lowered, depending on the arrangement thereof. In a structure in which a plurality of electronic components are arranged along an airflow path, the temperature of the airflow may be increased drastically depending on the number of electronic components, and the cooling efficiency of the fan with respect to the heat generating components may be lowered. Accordingly, an object of the present invention is to suppress the obstruction of an air flow by an electronic component provided in an air flow path and to improve the cooling efficiency of a heat generating component.

Technical proposal adopted for solving the technical problems

The driving device of the present invention is characterized by comprising: a housing having an air inlet and an air outlet; a fan provided in an airflow path which is a path of airflow from the air inlet toward the air outlet, and configured to supply air to the heat generating member; and a plurality of electronic components provided at a position between the air inlet and the fan in the air flow 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 from the air inlet toward the air outlet in the air flow path, and the capacitors in the arrangement direction are unevenly spaced from each other.

According to this aspect, since the plurality of capacitors are arranged in parallel in the arrangement direction intersecting the downstream direction, localized temperature rise of the airflow can be suppressed. In addition, since the capacitors are not uniformly spaced in the arrangement direction, the air flow can efficiently pass through the wide-spaced portions, and the air introduced through the air inlet can be efficiently supplied to the heat generating component. Therefore, the electronic component provided in the airflow path can be prevented from blocking 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 components, and the plurality of relay circuits may be arranged side by side in the arrangement direction, and the intervals between the relay circuits may be unevenly arranged in the arrangement direction, so that the overlapping amount of the intervals between the relay circuits and the intervals between the capacitors increases, as compared with a case where the intervals between the relay circuits are made even. If a plurality of relay circuits are provided in such a configuration, it is possible to suppress the relay circuits from blocking the airflow in the airflow path.

In the driving device of the present invention, the capacitors may have a relatively narrow first spacer and a relatively wide second spacer as the space between the capacitors, and the fans may be disposed so as to overlap the second spacer in the arrangement direction. If the fan is provided in such a configuration, 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, and the plate-like member may be disposed such that a largest area surface of the plate-like member does not face the downstream direction. If the plate-like member is provided in such a configuration, the plate-like member can be prevented from obstructing the air flow in the air flow path.

In the driving device according to the present invention, the electronic component may include first and second electronic components of different types, and each of the first and second electronic components 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 a 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 moved 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 space therebetween, movement of heat between the first electronic component and the second electronic component can be suppressed.

Effects of the invention

The invention provides a driving device capable of preventing electronic components arranged in an airflow path from blocking airflow and improving cooling efficiency of 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, as seen 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 in which a part of the housing is removed from the state of fig. 1.

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

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

Fig. 7 is a schematic perspective view of a driving device according to an embodiment of the present invention in a state in which a mounting portion of a 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 prevention resistor in a driving device according to an embodiment of the present invention.

Description of the reference numerals

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

Detailed Description

Hereinafter, as an example of the driving device of the present invention, a driving device 1 for controlling an industrial robot will be described with reference to fig. 1 to 8. 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 structure of the driving device 1 will be described. As shown in fig. 1 and 2, the outside of the driving device 1 is covered with a housing 2. The housing 2 is provided with a plurality of vents 21 for allowing air to move between the inside and the outside of the driving device 1.

Fig. 1 and 2 show a state in which all the housing parts constituting the housing 2 are mounted. As shown in fig. 1 and 2, as the housing portions constituting the housing 2, there are a first upper surface housing portion 2a, a first side surface housing portion 2b, a second side surface housing portion 2c, a first front surface housing portion 2d, a first rear surface housing portion 2e, and the like. On the other hand, fig. 3 to 5 show the case 2 with the first front case 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 driving device 1. The fan 3 provided at a position facing the vent 21 of the first front case 2d is an intake fan 3A that sucks air from the outside to the inside of the driving device 1. The fan 3 provided at a position facing the 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 driving 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 driving device 1 of the present embodiment, the vent 21 on the first rear housing part 2e side in the housing 2, which discharges air from the inside to the outside of the driving device 1, constitutes the exhaust port 23. As shown in fig. 1, the air inlet 22 is formed by the air port 21 on the first front housing part 2d side 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 housing 2 on the side of the first front housing portion 2d where the intake port 22 is formed toward the surface of the housing 2 on the side of the first rear housing portion 2e where the exhaust port 23 is formed is referred to as the forward flow direction F1, and the direction opposite to the forward flow direction F1 is referred to as the backward flow direction F2. The forward flow direction F1 is a direction along the Z-axis direction, although the direction thereof slightly changes as it goes from the upstream side to the downstream side due to various components provided inside the driving device 1. In addition, the reverse flow direction F2 is also a direction along the Z-axis direction substantially as in the forward flow direction F1.

Various components are arranged in the airflow path, which is the path of the airflow from the intake port 22 to the exhaust port 23. The configuration of the constituent members will be mainly described in detail below. The driving device 1 of the present embodiment includes the intake port 22 and the exhaust port 23 at a plurality of positions, and has a plurality of air flow paths, i.e., air flow paths, which are paths of the air flow from the intake port 22 toward the exhaust port 23. Next, an air flow path in which the control board 6 as an example of the heat generating component and the 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 driving device 1 of the present embodiment includes an intake fan 3A in its airflow path. The suction fans 3A are provided in total in three positions facing the air inlet 21 serving as the air inlet 22 provided in the first front case portion 2 d. By driving the suction fan 3A, air can be introduced into the casing 2 through the suction 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-shaped electronic components, that is, plate-shaped members, on the airflow path. Specifically, the first substrate holding portion 12A, the second substrate holding portion 12B, the substrate 13, the inrush current prevention 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 is turned on. As shown in fig. 3 to 7, each of the plate-like members has a largest surface area, which is a surface of the plate-like member having the largest area, parallel to the downstream direction F1. In other words, the plate-like members are each provided in a configuration in which the largest area face does not face the forward flow direction F1. Therefore, the plate-like members are suppressed from obstructing the air flow in the air flow path. If the blocking of the air flow can be suppressed, the air flow at the temperature rise can be suppressed from being retained in the device. The term "not facing" as used herein means that the direction is not limited to the parallel direction, and may be slightly inclined with respect to the parallel direction.

< Relay Circuit >)

As shown in fig. 3 and 4, the driving device 1 of the present embodiment includes a plurality of relay circuits 8 in its airflow path. Specifically, the three relay circuits 8, that is, the first relay circuit 8a, the second relay circuit 8b, and the third relay circuit 8c are provided. The relay circuit 8 is a circuit for supplying power to various substrates such as the control substrate 6. The three relay circuits 8 are arranged side by side along the Y-axis direction intersecting the forward flow direction F1, but as shown in fig. 4, the interval G1a of the first relay circuit 8a and the second relay circuit 8b is longer than the interval G1b of 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 will be 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, the capacitor circuit includes 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 4 h. The capacitor 4 is an electronic component for storing and discharging electric power, and has one terminal connected to a power supply, not shown, and the other terminal connected to ground. Eight capacitors 4 are arranged side by side along the Y-axis direction crossing the forward flow direction F1, but as shown in fig. 5, the interval G2a of the first capacitor 4a and the second capacitor 4b is slightly wider, the interval G2b of the second capacitor 4b and the third capacitor 4c is narrower, the interval G2c of the third capacitor 4c and the fourth capacitor 4d is wider, the interval G2d of the fourth capacitor 4d and the fifth capacitor 4e is narrower, the interval G2e of the fifth capacitor 4e and the sixth capacitor 4F is slightly wider, the interval G2F of the sixth capacitor 4F and the seventh capacitor 4G is narrower, and the interval G2G of the seventh capacitor 4G and the eighth capacitor 4h is wider. The reason why the intervals of the eight capacitors 4 are not uniform like this will be described later.

Control substrate >

As shown in fig. 7, the driving device 1 of the present embodiment includes a plurality of control boards 6 as control units for moving the arms of the industrial robot in the airflow path. As the plurality of control boards 6, specifically, four control boards, that is, a first control board 6a, a second control board 6b, a third control board 6c, and a fourth control board 6d, may be provided. 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 a heat generating component such as a resistance 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 the temperature rise of the control board 6 by blowing air to the surface of the control board 6. Specifically, four surface cooling fans, that is, 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 driving device 1 of the present embodiment, the control board 6 is arranged in a direction parallel to the Z-axis direction in a plan view. The front cooling fan 3C is disposed so as to be inclined with respect to the Z-axis direction in plan view. Accordingly, the flow direction of the air flow formed by the surface cooling fan 3C is inclined with respect to the control substrate 6, and the air flow reaching the control substrate 6 is directed along the control substrate 6 in the downstream direction F1. By arranging the surface cooling fan 3C in this manner, in the driving device 1 of the present embodiment, the air flow blown from the surface cooling fan 3C toward the control board 6 is less likely to stay in the device, 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 cooling fans 3B in the airflow path. Specifically, as the back cooling fan 3B, four back cooling fans, that is, a first back cooling fan 3Ba, a second back cooling fan 3Bb, a third back cooling fan 3Bc, and a fourth back cooling fan 3Bd, are provided in common at positions facing the air vents 21 as the air vents 23 provided in the first back housing portion 2 e. By driving the back cooling fan 3B, the air heated by the heat sink disposed on the back surface of the control board 6 can be efficiently discharged to the outside of the casing 2 through the exhaust port 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 the Y-axis direction is that, when the capacitors 4 are arranged in the downstream direction F1, only the vicinity of the capacitors 4 locally increases in temperature while the airflow from the intake port 22 to the exhaust port 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, decreases.

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

In addition, for example, as shown in fig. 5, in the driving device 1 of the present embodiment, the positions of the interval G2a and the first surface cooling fan 3Ca, the interval G2c and the second surface cooling fan 3Cb, the interval G2e and the third surface cooling fan 3Cc, and the interval G2G and the fourth surface cooling fan 3Cd overlap, as viewed from the forward flow direction F1. Therefore, it can be said that the air blowing efficiency from the air inlet 22 to each surface cooling fan 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.

In the driving device 1 of the present embodiment, if the above is said, as the intervals of the capacitors 4 from each other, there are a relatively narrow first interval portion (interval G2b, interval G2d, interval G2 f) and a relatively wide second interval portion (interval G2a, interval G2c, interval G2e, interval G2G), and the fan 3 is disposed in a configuration overlapping the second interval portion in the arrangement direction along the Y-axis direction. By providing the fan 3 in such a configuration, the driving 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 a 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 of 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 parallel in the downstream direction F1, the air flow from the air inlet 22 to the air outlet 23 is locally increased in temperature by the heat of the relay circuits 8, and the cooling efficiency of the relay circuits 8, the capacitor 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 that, as viewed from the forward flow direction F1 as shown in fig. 4, the amount of overlap of the intervals between the capacitors 4 and the intervals between the relay circuits 8 is increased. 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 increases. If a plurality of relay circuits 8 are provided in such a configuration, it is possible to suppress the relay circuits 8 from obstructing the air flow in the air flow path.

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

In the driving device 1 of the present embodiment, if the above description is put another way, there are different types of the relay circuit 8 as the first electronic component and the inrush current prevention resistor 10 as the second electronic component, and the relay circuit 8 and the inrush current prevention resistor 10 are each fixed to the common sheet metal member 11 in a state of being spaced apart. In this way, by fixing the relay circuit 8 and the inrush resistor 10 to the common sheet metal member 11, the device structure can be simplified, and the heat generated in the relay circuit 8 and the inrush resistor 10 can be efficiently moved by the sheet metal member 11 made of metal having a high thermal conductivity. Further, by fixing the relay circuit 8 and the inrush resistor 10 with a gap therebetween, the movement of heat between the relay circuit 8 and the inrush resistor 10 can be suppressed.

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

Thus, the present invention is not limited to the above-described embodiments, and can be implemented in various configurations within a range not departing from the gist thereof. For example, in order to solve some or all of the above-described problems or to achieve some or all of the above-described effects, the technical features of the embodiments corresponding to the technical features of the embodiments described in the summary of the invention can be appropriately replaced or combined. In addition, if this technical feature is not indispensable in the present specification, it may be deleted appropriately.

Claims (5)

1. A driving device is characterized by comprising:

a housing having an air inlet and an air outlet;

a fan provided in an airflow path which is a path of airflow from the air inlet toward the air outlet, and configured to supply air to the heat generating member; and

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

a plurality of capacitors are provided as the electronic parts,

the plurality of capacitors are arranged side by side in an arrangement direction intersecting a downstream direction from the intake port toward the exhaust port in the airflow path,

the capacitors in the arrangement direction are unevenly spaced from each other, and the spacing has a first spacing portion that is relatively narrow and a second spacing portion that is relatively wide, so that air flow is effectively passed through the second spacing portions between adjacent ones of the capacitors, and air introduced from the air inlet is effectively supplied to the heat generating component by the fan.

2. The driving device according to claim 1, wherein,

having a plurality of relay circuits 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 unevenly arranged 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 the case where the intervals of the relay circuits are made even.

3. Drive device according to claim 1 or 2, characterized in that,

the fans are disposed in a configuration overlapping the second spacers in the arrangement direction.

4. Drive device according to claim 1 or 2, characterized in that,

the electronic component has a plate-like member,

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

5. Drive device according to claim 1 or 2, characterized in that,

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

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