JP7471531B1 - Motor Control Device - Google Patents

Abstract

The device includes a main circuit case 30 having an opening 36, a main circuit board 21, and engaging portions 24a to 24d, and a control unit case body 20 and a control unit case cover 10 having a control board 21 and installed on the main circuit case 30 so as to close the opening 36. The control unit case body 20 and the control unit case cover 10 have protrusions 23a to 23d and an inclined portion 26 that respectively engage with the engaging portions 24a to 24d. The inclined portion 26 is provided so that the cross-sectional areas of the control unit case body 20 and the control unit case cover 10 become smaller as they move away from the opening 36. When the control unit case body 20 and the control unit case cover 10 rotate around the protrusions 23a and 23c in a direction to open the opening 36, the control unit case body 20 and the control unit case cover 10 can rotate without protruding outside the outer periphery of the opening 36 of the main circuit case 30 when viewed from a direction perpendicular to the opening 36.

Description

The present disclosure relates to a motor control device that controls the drive of a motor.

A motor control device is a device that supplies power to a motor, which is a driving device, and controls the motor's rotational speed and torque. There are cases where one motor control device controls one motor, and cases where one motor control device controls multiple motors. There are also cases where multiple motor control devices are used to rotate multiple motors simultaneously, each at different rotational speeds or torques. When multiple motor control devices are used, the multiple motor control devices may be installed within a single control panel. In this case, because space within the control panel is limited, the motor control devices or the motor control devices and other structures may be placed close to each other.

In conventional motor control devices, the wiring cover is positioned and attached to the electronic device body by hooking the hooks on the body side and the cover side to each other (see, for example, Patent Document 1).

WO 2018/87929 (Figure 3)

In the conventional motor control device described above, the wiring cover needs to be removed when performing maintenance work on the electronic device body. When removing the wiring cover, the wiring cover is rotated around the contact point between the body-side hook claw and the cover-side hook claw. This makes it difficult to remove the wiring cover, especially when the upper end of the wiring cover on the cover-side hook claw side comes into contact with another structure (another motor control device or other structure) that is placed nearby. This results in the problem of difficult maintenance work.

The present disclosure has been made to solve the above problems, and provides a motor control device that can easily perform maintenance work even when another structure is located nearby.

The motor control device according to this disclosure comprises an opening having an opening on a surface facing a bottom surface, a first case having an engagement portion which is a slide rail on one of four side surfaces which constitute the opening, a first substrate provided within the first case, a second case installed on the first case so as to close the opening, having a protrusion on its side which engages with the engagement portion, and having an inclined portion on a side other than the side with the protrusion , such that the area of the portion which is parallel to the opening and is surrounded by the outer periphery of the second case becomes smaller as it moves away from the opening, and a second substrate provided within the second case, the inclined portion being provided so that the second case can rotate without protruding outside the outer periphery of the opening of the first case when viewed from a direction perpendicular to the opening, by the second case sliding and moving on the engagement portion and rotating about the protrusion as an axis.

According to the present disclosure, maintenance work on the motor control device can be easily performed even when another structure is located nearby.

1 is a perspective view showing a motor control device according to a first embodiment; 1 is an exploded perspective view showing a motor control device according to a first embodiment of the present invention; This is a cross-sectional view of B-B' in Figure 1. This is a cross-sectional view of C-C' in Figure 1. This is a view of the D-D'-E-E' plane in Figure 2 as viewed from the positive x-axis direction toward the negative x-axis direction. This is a view of the D-D'-E-E' plane in Figure 2 as viewed from the negative x-axis direction toward the positive x-axis direction. 5 is a side view showing an operation of opening an opening of a main circuit case of the motor control device in embodiment 1. FIG. FIG. 2 is a plan view showing a motor control device installed in a control panel. This is a cross-sectional view taken along line A-A' of Figure 8. FIG. 11 is a perspective view showing a motor control device according to a second embodiment. FIG. 11 is an exploded perspective view showing a motor control device according to a second embodiment. This is a view of the F-F'-G-G' plane in Figure 11 viewed from the positive x-axis direction toward the negative x-axis direction. This is a view of the F-F'-G-G' plane in Figure 11 looking from the negative x-axis direction toward the positive x-axis direction. 13 is a side view showing the operation when opening the opening of the main circuit case of the motor control device in embodiment 2. FIG. FIG. 11 is a perspective view showing a motor control device according to a third embodiment. FIG. 11 is an exploded perspective view showing a motor control device according to a third embodiment. 13 is a side view showing the operation when opening the opening of the main circuit case of the motor control device in embodiment 3. FIG.

Embodiment 1.
In the following, for ease of explanation, the x-y-z axes shown in the figures will be appropriately referenced. First, the configuration of a motor control device 1 in embodiment 1 will be described. Figure 1 is a perspective view showing the motor control device 1 in embodiment 1. Figure 2 is an exploded perspective view showing the motor control device 1 in embodiment 1.

In Figures 1 and 2, the motor control device 1 has a main circuit unit 3 and a control unit 2 provided on the positive z-axis side of the main circuit unit 3.

The main circuit section 3 is composed of a heat sink 40, a main circuit board 31 which is a first board arranged on the main surface of the heat sink 40, and a main circuit section case 30 which is a first case arranged on the periphery of the heat sink 40 and covers the outer periphery of the main circuit board 31.

The main circuit case 30 has an opening at the top located in the positive direction of the z-axis, and this opening 36 has a shape having a pair of long sides and a pair of short sides. Wiring work for the purpose of maintenance of the main circuit board 31 can be performed through the opening 36. The main circuit case 30 has a pair of long side surfaces and a pair of short side surfaces, and holes 24a, 24b, 24c, and 24d, which are engagement parts, are formed near the ends of the long side surfaces of the main circuit case 30 in the positive direction of the z-axis. The holes 24a and 24b are formed on one long side surface, and the holes 24c and 24d are formed on the other long side surface. The holes 24a and 24c are formed near the ends of the pair of long side surfaces on the negative side of the y-axis, and the holes 24b and 24d are formed near the ends of the pair of long side surfaces on the positive side of the y-axis. The main circuit case 30 is made of a material that can be elastically deformed, such as resin.

The main circuit board 31 is provided in the main circuit case 30 so that its main surface is parallel to the xy plane. Electronic components 33, a connector 32, and a terminal block 34 are mounted on the main surface of the main circuit board 31 on the positive z-axis side.

The heat sink 40 is structurally connected to the main circuit board 31 via a power conversion element such as a semiconductor module (not shown) or a spacer. In addition, fixing holes 35 are formed in the four corners of the main surface of the heat sink 40 for mounting the motor control device 1 to a control panel.

The control unit 2 is composed of a control board 21, which is a second board, a control unit case body 20 for fixing the control board 21, and a control unit case cover 10 that covers the outer periphery and top surface of the control board 21. The control unit case body 20 and the control unit case cover 10 form a second case.

The control unit case body 20 is installed on the main circuit case 30 so as to close the opening 36 of the main circuit case 30. The bottom surface of the control unit case body 20, i.e., the surface that closes the opening 36 of the main circuit case 30, has the same shape as the opening 36 of the main circuit case 30. The control unit case body 20 has a pair of long side surfaces and a pair of short side surfaces, and protrusions 23a, 23b, 23c, and 23d are provided near the end of the long side surface of the control unit case body 20 in the negative direction of the z axis. The protrusions 23a and 23b are formed on one long side surface, and the protrusions 23c and 23d are formed on the other long side surface. The protrusions 23a and 23c are formed near the end of the pair of long side surfaces in the negative direction of the y axis, respectively, and the protrusions 23b and 23d are formed near the end of the pair of long side surfaces in the positive direction of the y axis, respectively. The projections 23a, 23b, 23c, and 23d can engage with the holes 24a, 24b, 24c, and 24d, respectively. The control unit case body 20 is made of a material capable of elastic deformation, such as resin. Note that "the same shape as the opening 36 of the main circuit case 30" does not only mean the same shape as the opening 36 of the main circuit case 30 in the strict sense, but also includes shapes that can be said to be substantially the same shape, such as a shape that is slightly distorted from the shape of the opening 36 of the main circuit case 30, a shape that is slightly larger or smaller in area than the shape of the opening 36 of the main circuit case 30, and a shape that has a convex or concave portion in part of the shape of the opening 36 of the main circuit case 30.

The control unit case cover 10 is provided on the z-axis positive side of the control unit case body 20 and is joined to the control unit case body 20. The control unit case cover 10 has a pair of long side surfaces and a pair of short side surfaces, and the short side surface of the control unit case cover 10 that is on the y-axis negative side has an inclined portion 26 that is inclined in the y-axis positive direction with respect to the z-axis positive direction. In other words, by having the inclined portion 26, the cross-sectional area of the surface of the control unit case cover 10 that is parallel to the x-y plane becomes smaller as it moves away from the opening 36 of the main circuit case 30 in the z-axis positive direction.

The control board 21 is provided on the surface of the control unit case body 20 on the positive side of the z-axis, and the outer periphery and top surface of the control board 21 are covered by the control unit case cover 10. That is, the control board 21 is provided in a second case composed of the control unit case body 20 and the control unit case cover 10. The main surface of the control board 21 is installed so as to be parallel to the x-y plane. A connector 22 is mounted on the main surface of the control board 21 on the negative side of the z-axis. The surface of the control board 21 on which the connector 22 is mounted and the surface of the main circuit board 31 on which the connector 32 and the like are mounted face each other. In addition, the connector 32 of the main circuit board 31 and the connector 22 of the control board 21 are electrically connected to each other by the harness 11. That is, the main circuit board 31 and the control board 21 are electrically connected to each other.

Next, the manner in which the projections 23a, 23b, 23c, and 23d of the control unit case body 20 engage with the holes 24a, 24b, 24c, and 24d of the main circuit unit case 30 will be described in detail. FIG. 3 is a cross-sectional view taken along the line B-B' in FIG. 1. FIG. 4 is a cross-sectional view taken along the line C-C' in FIG. 1. As shown in FIG. 3, the projections 23a and 23c provided on a pair of longitudinal side surfaces of the control unit case body 20 engage with the holes 24a and 24c formed on a pair of longitudinal side surfaces of the main circuit unit case 30. As shown in FIG. 4, the projections 23b and 23d provided on a pair of longitudinal side surfaces of the control unit case body 20 engage with the holes 24b and 24d formed on a pair of longitudinal side surfaces of the main circuit unit case 30. Since the main circuit case 30 and the control unit case body 20 are made of a material capable of elastic deformation, such as resin, by utilizing the elastic deformation of the main circuit case 30, the control unit case body 20, or both, the protrusions 23a, 23b, 23c, and 23d can be removed from the holes 24a, 24b, 24c, and 24d, respectively.

Figure 5 is a view of the D-D'-E-E' plane in Figure 2, viewed from the positive x-axis direction toward the negative x-axis direction. Figure 6 is a view of the D-D'-E-E' plane in Figure 2, viewed from the negative x-axis direction toward the positive x-axis direction. As shown in Figures 5 and 6, the protrusions 23a and 23b of the control unit case body 20 are engaged with the holes 24a and 24b of the main circuit unit case 30, respectively. Similarly, the protrusions 23c and 23d are engaged with the holes 24c and 24d, respectively. When the protrusions 23b and 23d are removed from the holes 24b and 24d, respectively, the control unit 2 can rotate in a circle in the y-z plane, with the protrusions 23a and 23c as axes. This allows the opening 36 of the main circuit unit case 30 to be opened and closed.

Next, an operation of opening the opening 36 of the main circuit case 30 of the motor control device 1 in embodiment 1 will be described. Figure 7 is a side view showing the operation of opening the opening 36 of the main circuit case 30 of the motor control device 1 in embodiment 1, where Figure 7(a) shows the state in which the opening 36 is closed and Figure 7(b) shows the state in which the opening 36 is open.

7(a), when the protrusions 23b, 23d of the control unit case body 20 are removed from the holes 24b, 24d of the main circuit unit case 30, respectively, the control unit case body 20 and the control unit case cover 10 become rotatable about the protrusions 23a, 23c. By rotating the control unit case body 20 and the control unit case cover 10, the opening 36 of the main circuit unit case 30 can be opened.

7(b), the inclined portion 26 is provided on the short side of the control unit case cover 10, so that the control unit case body 20 and the control unit case cover 10 can rotate without protruding beyond the outer periphery of the opening 36 of the main circuit unit case 30 when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30. In addition, by increasing the inclination degree of the inclined portion 26, the range in which the control unit case body 20 and the control unit case cover 10 can rotate without protruding beyond the outer periphery of the opening 36 of the main circuit unit case 30 when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30 can be increased. In addition, it is preferable that the length of the harness 11 is designed to be longer than the distance between the connector 32 and the connector 22 when the opening 36 of the main circuit unit case 30 is opened so that the bottom surface of the control unit case body 20 is perpendicular to the x-y plane.

As described above, the motor control device 1 in the first embodiment includes a main circuit case 30 having an opening 36, a main circuit board 31 provided in the main circuit case 30, a control unit case body 20 and a control unit case cover 10 installed on the main circuit case 30 so as to close the opening 36 of the main circuit case 30, and a control board 21 provided in the control unit case body 20 and the control unit case cover 10. The main circuit case 30 has holes 24a, 24b, 24c, and 24d, the control unit case body 20 has protrusions 23a, 23b, 23c, and 23d that engage with the holes 24a, 24b, 24c, and 24d, and the control unit case body 20 and the control unit case cover 10 can open and close the opening 36 of the main circuit case 30 by rotating about the protrusions 23a and 23c. Also, the side surface of the control unit case cover 10 has an inclined portion 26 so that the cross-sectional area of the control unit case cover 10 decreases with increasing distance from the opening 36 of the main circuit case 30. The inclined portion 26 is provided so that when the control unit case body 20 and the control unit case cover 10 rotate in a direction to open the opening 36 of the main circuit case 30, the control unit case body 20 and the control unit case cover 10 can rotate without protruding outside the outer periphery of the opening 36 of the main circuit case 30 when viewed from a direction perpendicular to the opening 36 of the main circuit case 30. This configuration makes it easy to perform maintenance work on the motor control device even when another structure is placed nearby.

The case where multiple motor control devices are arranged in close proximity will be described in more detail. FIG. 8 is a plan view showing multiple motor control devices 1a installed in a control panel. FIG. 9 is a cross-sectional view taken along the line A-A' in FIG. 8. The motor control device 1a is different from the motor control device 1 in the first embodiment in that the side of the control unit case cover 10a does not have an inclined portion 26. As shown in FIG. 8 and FIG. 9, the terminal block 34a of each motor control device 1a is connected to one end of the cable 4a, and the other end of the cable 4a is connected to the cable 4b in the wiring duct 5. The wiring duct 5 is installed close to the motor control device 1a on the negative y-axis side of the motor control device 1a. When multiple motor control devices 1a are installed in a control panel in this way, the space in the control panel is limited, so it is necessary to reduce the gap between the motor control devices 1a or between the motor control devices 1a and the wiring duct 5, that is, to install the motor control devices 1a or the motor control devices 1a and the wiring duct 5 close to each other. In such a case, even if an attempt is made to open the opening 36a of the main circuit case 30a by rotating the control unit case body 20a and the control unit case cover 10a, which does not have the inclined portion 26, the opening 36a of the main circuit case 30a cannot be opened because the end of the control unit case cover 10a, particularly the end on the positive z-axis side, comes into contact with the wiring duct 5. This makes it difficult to perform maintenance on the components on the main circuit board 31a.

On the other hand, in the motor control device 1 in embodiment 1, by providing an inclined portion 26 on the side of the control unit case cover 10, when the control unit case body 20 and the control unit case cover 10 rotate in a direction to open the opening 36 of the main circuit unit case 30, the control unit case body 20 and the control unit case cover 10 can rotate without protruding outside the outer periphery of the opening 36 of the main circuit unit case 30 when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30. Therefore, even when multiple motor control devices 1 are placed close to each other, the control unit case cover 10 can open the opening 36 of the main circuit unit case 30 without interfering with the wiring duct 5. This makes it easy to perform maintenance work on the components on the main circuit board 31.

The motor control device 1a receives power from the outside through the terminal block 34a, converts the power on the main circuit board 31a, and supplies the power to the motor to control the rotation speed and torque of the motor. In order to supply power to the terminal block 34a, it is necessary to wire the cable 4a to the terminal block 34a. In order to ensure the reliability of the connection, a screw-type terminal block that allows torque management is generally used for the terminal block 34a. Therefore, when wiring the cable 4a to the terminal block 34a as part of maintenance, it is necessary to insert a tool such as a screwdriver into the main circuit case 30 from the positive z-axis side toward the negative z-axis side to perform wiring work to the terminal block 34a. As shown in Figures 8 and 9, when multiple motor control devices 1a are installed close to each other, the gap between the motor control devices 1a or the gap between the motor control device 1a and the wiring duct 5 is small, and it is difficult to open the opening 36a of the main circuit case 30a by moving the control unit case body 20a and the control unit case cover 10a by rotating them, etc. Therefore, a configuration is considered in which a space is provided above the terminal block 34a on the z-axis positive side so that wiring can be performed on the terminal block 34a without moving the control block case body 20a and the control block case cover 10a, allowing insertion of a tool such as a screwdriver. Specifically, as shown in Fig. 9, the length of the control block case body 20a and the control block case cover 10a in the y-axis direction is made smaller than the length of the opening 36 of the main circuit block case 30a in the y-axis direction, and the length of the control board 21a in the y-axis direction is made smaller than the length of the main circuit board 31a in the y-axis direction, so that the control block case body 20a, the control block case cover 10a, and the control board 21a are not positioned above the terminal block 34a on the z-axis positive side. However, with such a configuration, the area of the main surface of the control board 21a becomes smaller than the area of the main surface of the main circuit board 31a, and the number of components that can be mounted on the control board 21a also becomes smaller.

On the other hand, as described above, in the motor control device 1 in embodiment 1, even when multiple motor control devices 1 are arranged close to each other, the control unit case body 20 and the control unit case cover 10 can be rotated without interfering with the wiring duct 5, and the opening 36 of the main circuit case 30 can be opened. This allows tools such as a screwdriver to be inserted through the opening 36 of the main circuit case 30, and maintenance work including wiring work of the terminal block 34 can be performed. Therefore, the control board 21 may be located above the z-axis positive side of the terminal block 34, and the area of the main surface of the control board 21 can be made larger. In other words, more components can be mounted on the control board 21, and the control performance of the motor control device 1 can be expanded.

In addition, the main circuit board 31 has a connector 32, the control board 21 has a connector 22, and the connector 32 and the connector 22 are electrically connected to each other by the harness 11. The main circuit board 31 and the connector 32 are electrically connected to each other, and the control board 21 and the connector 22 are electrically connected to each other. That is, the main circuit board 31 and the control board 21 are electrically connected to each other. With this configuration, even when the control unit case body 20 and the control unit case cover 10 rotate and the opening 36 of the main circuit unit case 30 is opened, the electrical connection between the main circuit board 31 and the control board 21 can be maintained. Therefore, even when the opening 36 of the main circuit unit case 30 is opened and maintenance work is being performed inside the main circuit unit case 30, the motor control device 1 can be energized, and operation checks that cannot be confirmed unless the power is turned on can be performed, improving maintainability.

In the first embodiment, the protrusions 23a, 23b, 23c, and 23d are shown as being integral with the control unit case body 20, but the protrusions 23a, 23b, 23c, and 23d that are separate parts from the control unit case body 20 may be attached to the control unit case body 20. The shape of the protrusions 23a, 23b, 23c, and 23d is not limited to a shape that protrudes linearly from the side surface of the control unit case body 20, but may also be a curved shape, a shape that is a bent straight line, or a shape like a hook claw.

In the first embodiment, holes 24a, 24b, 24c, and 24d that penetrate the side surface of the main circuit case 30 are shown as the engagement parts, but grooves that do not penetrate the side surface of the main circuit case 30 may also be used as the engagement parts. Also, a shape protruding from the side surface of the main circuit case 30 may be used as the engagement part, and this protruding part may be engaged with the projections 23a, 23b, 23c, and 23d.

In addition, in embodiment 1, the main circuit board 31 and the control board 21 are electrically connected by the connector 32, the connector 22 and the harness 11, but the main circuit board 31 and the control board 21 may be electrically connected using a flex board instead of the connector 32, the connector 22 and the harness 11.

In the first embodiment, the shape of the opening 36 of the main circuit case 30 has a pair of long sides and a pair of short sides, but the shape is not limited to this, and may be a rectangle without a long side and a pair of short sides, a polygon other than a rectangle, a circle, an ellipse, or any other shape. The shape of the surface of the control unit case body 20 that closes the opening 36 of the main circuit case 30 is the same.

In the first embodiment, the wiring duct 5 is used as an example of another structure adjacent to the motor control device 1, but the other structure is not limited to the wiring duct 5. Even when another motor control device 1, a side wall of a control panel, or other structure is installed adjacent to the motor control device 1, the same effect as in the first embodiment can be obtained.

In the first embodiment, an inclined portion 26 is provided on the short side of the control unit case cover 10, which is the side facing the negative direction of the y axis. Then, the protrusions 23b and 23d of the control unit case body 20 are removed from the holes 24b and 24d of the main circuit unit case 30, respectively, and the opening 36 of the main circuit unit case 30 is opened by rotating the control unit case body 20 and the control unit case cover 10 around the protrusions 23a and 23c. However, the opening 36 of the main circuit unit case 30 may be opened by providing an inclined portion 26 on the short side of the control unit case cover 10, which is the side facing the positive direction of the y axis, and removing the protrusions 23a and 23c of the control unit case body 20 from the holes 24a and 24c of the main circuit unit case 30, respectively, and rotating the control unit case body 20 and the control unit case cover 10 around the protrusions 23b and 23d.

Embodiment 2
The configuration of a motor control device 200 in embodiment 2 will be described. The same components as those in embodiment 1 are given the same reference numerals and their description will be omitted. Fig. 10 is a perspective view showing the motor control device 200 in embodiment 2. Fig. 11 is an exploded perspective view showing the motor control device 200 in embodiment 2. As shown in Figs. 10 and 11, the motor control device 200 differs from embodiment 1 in that it includes a main circuit unit 3b instead of the main circuit unit 3, and includes a main circuit unit case 30b instead of the main circuit unit case 30.

The main circuit case 30b has long holes 224a, 224b, 224c, and 224d, which are slide rails, instead of holes 24a, 24b, 24c, and 24d, as engagement parts. The long holes 224a, 224b, 224c, and 224d are provided on the long side surfaces of the main circuit case 30b and are provided to extend in the longitudinal direction, i.e., the y-axis direction. The protrusions 23a, 23b, 23c, and 23d of the control unit case body 20 engage with the long holes 224a, 224b, 224c, and 224d, respectively, allowing the control unit case body 20 and the control unit case cover 10 to slide in the longitudinal direction, i.e., the y-axis direction.

The main circuit case 30b further has grooves 25a, 25b, 25c, and 25d extending in the positive direction of the z-axis from the long holes 224a, 224b, 224c, and 224d. Since the protrusions 23a, 23b, 23c, and 23d can move in the z-axis direction along the grooves 25a, 25b, 25c, and 25d, respectively, the protrusions 23a, 23b, 23c, and 23d can be easily removed from the long holes 224a, 224b, 224c, and 224d.

Figure 12 is a view of the F-F'-G-G' plane in Figure 11 as viewed from the x-axis positive side toward the x-axis negative side. Figure 13 is a view of the F-F'-G-G' plane in Figure 11 as viewed from the x-axis negative side toward the x-axis positive side. As shown in Figures 12 and 13, the protrusions 23a and 23b of the control unit case body 20 are engaged with the long holes 224a and 224b of the main circuit unit case 30b, respectively. Similarly, the protrusions 23c and 23d are engaged with the long holes 224c and 224d, respectively. When the protrusions 23b and 23d are moved in the z-axis positive direction along the grooves 25b and 25d and removed from the long holes 224b and 224d, respectively, the control unit case body 20 and the control unit case cover 10 can rotate in a circle in the y-z plane around the protrusions 23a and 23c as axes. This allows the opening 36 of the main circuit unit case 30b to be opened and closed.

Next, the operation of opening the opening 36 of the main circuit case 30b of the motor control device 200 in embodiment 2 will be described. Figure 14 is a side view showing the operation of opening the opening 36 of the main circuit case 30b of the motor control device 200 in embodiment 2. Figure 14(a) is a diagram showing the state in which the opening 36 is closed, Figure 14(b) is a diagram showing the state in which the opening 36 is open, and Figure 14(c) is a diagram showing the state in which the opening 36 has been opened until the bottom surface of the control unit case main body 20 is perpendicular to the x-y plane.

14(a), when the protrusions 23b, 23d of the control unit case body 20 are removed from the long holes 224b, 224d of the main circuit unit case 30b along the grooves 25b, 25d, respectively, the control unit case body 20 and the control unit case cover 10 become rotatable about the protrusions 23a, 23c. By rotating the control unit case body 20 and the control unit case cover 10, the opening 36 of the main circuit unit case 30b can be opened.

14(b), the inclined portion 26 is provided on the short side surface of the control unit case cover 10, so that the control unit case body 20 and the control unit case cover 10 can rotate without protruding outside the outer periphery of the opening 36 of the main circuit unit case 30b when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30b. Increasing the inclination of the inclined portion 26 can increase the range over which the control unit case body 20 and the control unit case cover 10 can rotate without protruding outside the outer periphery of the opening 36 of the main circuit unit case 30b when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30b.

The protrusions 23a and 23c are engaged with the long holes 224a and 224c, and can slide in the y-axis direction through the long holes 224a and 224c. That is, the control unit case body 20 and the control unit case cover 10 can slide in the y-axis direction along the long holes 224a and 224c. From the state shown in FIG. 14(b), the control unit case body 20 and the control unit case cover 10 rotate in a circle in the y-z plane around the protrusions 23a and 23c as axes while sliding in the positive y-axis direction, so that the control unit case body 20 and the control unit case cover 10 do not protrude beyond the outer periphery of the opening 36 of the main circuit case 30b when viewed from a direction perpendicular to the opening 36 of the main circuit case 30b, and the bottom surface of the control unit case body 20 can be opened perpendicular to the x-y plane, as shown in FIG. 14(c).

As described above, the motor control device 200 described in the second embodiment has long holes 224a, 224c through which the protrusions 23a, 24c can slide in the longitudinal direction of the main circuit case 30b, i.e., the y-axis direction. This allows the control unit case body 20 and the control unit case cover 10 to open wider than the outer periphery of the opening 36 of the main circuit case 30b when viewed from a direction perpendicular to the opening 36 of the main circuit case 30b, compared to the motor control device 1 described in the first embodiment. This makes it easier to perform maintenance work on the motor control device 200 even when another structure is placed nearby.

In the second embodiment, the long holes 224a, 224b, 224c, and 224d that penetrate the side surface of the main circuit case 30b are shown as slide rails, which are an example of engagement parts, but grooves that do not penetrate the side surface of the main circuit case 30b may be used as slide rails. Also, a shape protruding from the side surface of the main circuit case 30b may be used as a slide rail, and the protruding part may be engaged with the projections 23a, 23b, 23c, and 23d.

In the second embodiment, an inclined portion 26 is provided on the short side of the control unit case cover 10, which is the side facing the negative direction of the y axis. Then, the protrusions 23b and 23d of the control unit case body 20 are removed from the long holes 224b and 224d of the main circuit unit case 30b along the grooves 25b and 25d, respectively, and the control unit case body 20 and the control unit case cover 10 are rotated around the protrusions 23a and 23c to open the opening 36 of the main circuit unit case 30b. However, the inclined portion 26 may be provided on the short side of the control unit case cover 10, which is the side facing the positive direction of the y axis, and the protrusions 23a and 23c of the control unit case body 20 are removed from the long holes 224a and 224c of the main circuit unit case 30 along the grooves 25a and 25c, respectively, and the control unit case body 20 and the control unit case cover 10 are rotated around the protrusions 23b and 23d to open the opening 36 of the main circuit unit case 30b.

In the second embodiment, the long holes 224a and 224c are formed so that the protrusions 23a and 24c can slide in the longitudinal direction of the main circuit case 30b, i.e., in the y-axis direction. However, the direction in which the protrusions 23a and 24c slide does not necessarily have to be the longitudinal direction of the main circuit case 30b, and a certain effect can be obtained as long as the protrusions can slide in a direction intersecting the surface of the inclined portion 26. Therefore, the slide rail, which uses the long holes 224a and 224c as an example, can also be structured so that the protrusions 23a and 24c can slide in a direction intersecting the surface of the inclined portion 26.

Embodiment 3.
The configuration of the motor control device 300 in the third embodiment will be described. The same components as those in the second embodiment will be denoted by the same reference numerals and will not be described. FIG. 15 is a perspective view showing the motor control device 300 in the third embodiment. FIG. 16 is an exploded perspective view showing the motor control device 300 in the third embodiment. As shown in FIGS. 15 and 16, the motor control device 300 differs from the second embodiment in that it includes a main circuit section 3c instead of the main circuit section 3b, a main circuit section case 30c instead of the main circuit section case 30b, a control section 2c instead of the control section 2, a control section case body 20c instead of the control section case body 20, and a control section case cover 10c instead of the control section case cover 10.

The main circuit case 30c differs from the second embodiment in that it additionally includes grooves 325a, 325b, holes 326a, 326b, and steps 330a, 330b. Hole 326a is provided on the negative z-axis side of long hole 224b, and hole 326b is provided on the negative z-axis side of long hole 224d. Groove 325a is provided between long hole 224b and hole 326a, and groove 325b is provided between long hole 224d and hole 326b. Step 330a is provided so that the side surface on the long side of main circuit case 30c is concave in the negative x-axis direction, and step 330b is provided so that the side surface on the long side of main circuit case 30c is concave in the positive x-axis direction. In other words, the width in the short direction of the opening 36 in the portion of the main circuit case 30c where the step portions 330a, 330b are provided is narrower than the width in the short direction of the opening 36 in the portion where the step portions 330a, 330b are not provided.

The control unit case body 20c differs from the second embodiment in that it has protrusions 223a, 223b, 223c, 223d, 223e, and 223f instead of protrusions 23a, 23b, 23c, and 23d. Protrusion 223a engages with long hole 224a, protrusions 223b and 223c engage with long hole 224b, protrusion 223d engages with long hole 224c, and protrusions 223e and 223f engage with long hole 224d.

Furthermore, the control unit case cover 10c differs from the second embodiment in that it has an inclined portion 26c instead of the inclined portion 26. The inclined portion 26c differs from the inclined portion 26 in that it is provided on the short side surface of the control unit case cover 10c, the side surface on the positive y-axis direction side. The specific structure of the inclined portion 26c is the same as that of the inclined portion 26.

Next, the operation of opening the opening 36 of the main circuit case 30c of the motor control device 300 in embodiment 3 will be described. Figure 17 is a side view showing the operation when opening the opening 36 of the main circuit case 30c of the motor control device 300 in embodiment 3. Figure 17(a) is a diagram showing the state in which the opening 36 is closed, Figure 17(b) is a diagram showing the state in which the opening 36 has been opened until the bottom surface of the control unit case main body 20c is perpendicular to the xy plane, and Figure 17(c) is a diagram showing the state in which the control unit case main body 20c and the control unit case cover 10c are fixed to the main circuit case 30c.

17(a), when the protrusions 223a and 223d of the control unit case body 20c are removed from the long holes 224a and 224c of the main circuit unit case 30c along the grooves 25a and 25c, respectively, and the protrusions 223b and 223e are removed from the long holes 224b and 224d of the main circuit unit case 30c along the grooves 25b and 25d, respectively, the control unit case body 20c and the control unit case cover 10c become rotatable about the protrusions 223c and 223f. By rotating the control unit case body 20c and the control unit case cover 10c, the opening 36 of the main circuit unit case 30c can be opened.

In addition, since the inclined portion 26c is provided on the short side of the control unit case cover 10c, which is the side facing the positive direction of the y axis, the control unit case body 20c and the control unit case cover 10c rotate in a circular motion in the y-z plane around the projections 223c and 223f as axes, and slide in the negative direction of the y axis, so that when viewed from a direction perpendicular to the opening 36 of the main circuit unit case 30c, the control unit case body 20c and the control unit case cover 10c do not extend beyond the outer periphery of the opening 36 of the main circuit unit case 30c, and the opening 36 can be opened until the bottom surface of the control unit case body 20c is perpendicular to the x-y plane, as shown in FIG. 17(b). At this time, the step portions 330a and 330b support the control unit case body 20c and the control unit case cover 10c.

When the protrusions 223c and 223f move in the negative direction of the z-axis along the grooves 325a and 325b from the state shown in Fig. 17(b) and engage with the holes 326a and 326b, the state shown in Fig. 17(c) is reached. The step portions 330a and 330b support the control unit case body 20c and the control unit case cover 10c, and the protrusions 223c and 223f engage with the holes 326a and 326b, thereby fixing the control unit case body 20c and the control unit case cover 10c. This prevents the control unit case body 20c and the control unit case cover 10c from rotating in a direction that closes the opening 36 of the main circuit case 30c.

As described above, the motor control device 300 described in the third embodiment has the step portions 330a and 330b in which the width of the short side of the opening 36 is narrower than the other portions of the opening 36, and when the control unit case body 20c and the control unit case cover 10c rotate to open the opening 36, the control unit case body 20c and the control unit case cover 10c are supported by the step portions 330a and 330b, which prevents the control unit case body 20c and the control unit case cover 10c from rotating in the direction to close the opening 36. Therefore, the control unit case body 20c and the control unit case cover 10c can be fixed while the opening 36 of the main circuit unit case 30c is left wide open, making it possible to perform maintenance work using both hands. This improves the workability of maintenance of the motor control device 300. Furthermore, since the control unit case body 20c and the control unit case cover 10c can be fixed while the opening 36 is left wide open, the worker can simultaneously check the inside of the opening 36 of the main circuit unit case 30c of multiple motor control devices 300.

1, 1a, 200, 300 Motor control device 2, 2a, 2c Control unit 3, 3b, 3c Main circuit unit 4a Cable 4b Cable 5 Wiring duct 10, 10a, 10c Control unit case cover 11 Harness 20, 20a, 20c Control unit case body 30, 30a, 30b, 30c Main circuit unit case 21, 21a Control board 22, 32 Connector 23a, 23b, 23c, 23d, 223a, 223b, 223c, 223d, 223e, 223f Protrusion 24a, 24b, 24c, 24d Engagement portion 224a, 224b, 224c, 224d, 324b, 324d Slide rail 25a, 25b, 25c, 25d, 325a, 325b Groove 26, 26c Inclined portion 31, 31a Main circuit board 33 Electronic component 34 Terminal block 35 Fixing hole 36, 36a Opening 326a, 326b Hole 330a, 330b Step portion 40 Heat sink

Claims (9)

a first case having an opening with a surface opposite to the bottom surface open, and an engagement portion that is a slide rail on one of four side surfaces that constitute the opening;
a first substrate provided in the first case;
a second case that is placed on the first case so as to close the opening, has a protrusion on a side surface thereof that engages with the engagement portion, and has an inclined portion on a side surface other than the side surface having the protrusion, the inclined portion being parallel to the opening and having an area that is surrounded by the outer periphery of the second case and that decreases as the area increases with distance from the opening;
a second substrate provided in the second case;
Equipped with
The inclined portion is configured so that the second case can rotate about the protrusion as an axis while sliding in the engagement portion, thereby allowing the second case to rotate without protruding outside the outer periphery of the opening of the first case when viewed from a direction perpendicular to the opening. the first case further has a step portion recessed inwardly on one of four side surfaces that form the opening, the step portion being provided on the engagement portion,
The motor control device according to claim 1 , wherein the second case is supported by the step portion when the protrusion engages with the engagement portion from the outer circumferential side of the first case and slides on the engagement portion while rotating about the protrusion to open the opening. The first case further includes a hole on the bottom side of the step portion from the engaging portion, and a groove is further provided between the hole and the engaging portion.
The motor control device according to claim 2 , wherein the projection moves along the groove and is fitted into the hole after the opening is opened by rotating about the projection while sliding at the engagement portion. The first case has a long side and a short side,
The motor control device according to claim 1 , wherein the slide rail is provided on a side surface on a longer side of the first case. The motor control device according to claim 4 , wherein the slide rail is provided to extend in a longitudinal direction of the side surface of the first case, and the slide rail allows the protrusion to slide in the longitudinal direction of the side surface of the first case. The second case has a long side surface and a short side surface,
The inclined portion is
The motor control device according to claim 4 or 5, wherein the second case is provided on a shorter side surface of the second case. The first substrate and the second substrate are
The motor control device according to claim 1 , wherein the motors are electrically connected to each other. The first substrate is
A first connector is provided.
The second substrate is
A second connector is provided.
The first connector and the second connector are
The motor control device according to claim 1 , wherein the motors are electrically connected to each other by a harness. The first substrate and the second substrate are
The motor control device according to claim 1 , wherein the motors are electrically connected to each other by a flex board.

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