Motor device

Abstract

This invention provides a motor device that simplifies the mounting configuration of the control board to the electric motor section, facilitates installation, and achieves a compact design. [Solution] The motor device 1 comprises an electric motor section 10 made of a cylindrical body and a control board 20 on which a control circuit made of electronic components is mounted and which is located on one side of the electric motor section 10 in the drive axis direction. The electric motor section 10 has a pair of power supply terminals 13 arranged opposite each other on one side of the drive axis direction, with the drive shaft 12 in between. The control board 20 is formed of a plate-like body with a cross-sectional shape smaller than or equal to the circular cross-section of the cylindrical body of the electric motor section 10, and has a pair of power supply terminals 22 arranged on the plane of the plate-like body and connected to an external power supply, and a pair of side end terminals 23 which are electrically connected to the power supply terminals 13 at their side end faces and through which current supplied from the pair of power supply terminals 22 is passed based on the control of the control circuit.

Description

Technical Field

[0001] The present invention relates to a motor device in which an electric motor and a control board are integrated. In particular, the present invention relates to a motor device with a simplified mounting configuration of the control board, easy mounting work, and a compact size.

Background Art

[0002] Conventionally, an electromechanical integrated motor device equipped with a control unit including a control board on which a control circuit is mounted is known.

[0003] For example, in a conventional printed circuit board fixed motor, an end bell fitted into an opening of a bottomed cylindrical motor case, and a pair of motor female terminals that contact a pair of external terminals inserted through a pair of insertion holes provided on the side surface of the end bell and are supplied with power from the outside. In a printed circuit board fixed motor in which a printed circuit board is fixed to the end bell surface side of the motor orthogonal to the motor shaft, an overall U-shaped tab having a motor terminal contact portion and a board pressing portion as both legs is used. The motor terminal contact portion of the U-shaped tab is inserted as an external terminal to make an electrical connection, and when the U-shaped tab is inserted, the printed circuit board is pressed by the board pressing portion to fix the printed circuit board to the motor, and the U-shaped tab is soldered to the printed wiring portion of the printed circuit board (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The printed circuit board-mounted motor described in Patent Document 1 enables electrical and mechanical connection and fixing between the motor and the printed circuit board using a U-shaped tab. However, because space is required to attach the U-shaped tab, the overall motor device becomes larger. Furthermore, because it requires components other than the motor and printed circuit board (the U-shaped tab), the number of components and manufacturing processes increases, leading to increased manufacturing costs.

[0006] The present invention was made to solve the above problems, and aims to provide a motor device that simplifies the mounting configuration of the control board to the electric motor section, facilitates installation, and is compact. [Means for solving the problem]

[0007] The motor device according to the present invention comprises an electric motor section made of a cylindrical body and a control board on which a control circuit made of electronic components is mounted and which is located on one side of the electric motor section in the drive axis direction. The electric motor section has a pair of power supply terminals arranged opposite each other on one side of the drive axis direction, with the drive shaft in between. The control board is formed of a plate-like body with a cross-sectional shape smaller than or equal to the circular cross-section of the cylindrical body of the electric motor section, and is disposed on the plane of the plate-like body. It has a pair of power supply terminals connected to an external power supply and a pair of side end terminals that are electrically connected to the power supply terminals at their side end faces and through which current supplied from the pair of power supply terminals is passed based on the control of the control circuit.

[0008] Thus, in the present invention, the electric motor unit and the control board are provided, and the power supply terminals and the side end terminals are electrically connected on the side end face of the control board. As a result, the electric motor unit and the control board can be integrated simply by inserting the control board between the power supply terminals and connecting them, which simplifies the mounting configuration of the control board, makes the mounting work easy, and allows for a more compact motor device.

[0009] In the motor device according to the present invention, the side end terminals are formed on the side end surfaces of the control board, which consist of opposing parallel planes, as necessary.

[0010] Thus, in this invention, since the side terminals are formed on the side end faces of the control board, which consist of opposing parallel planes, the power supply terminals and the side terminals can be joined surface to surface, allowing the control board to be supported more stably between the power supply terminals. Furthermore, the control board can be formed with the same size as the area extending between the power supply terminals relative to the planar area of ​​the electric motor section, thereby increasing the mounting area on the board.

[0011] The motor device according to the present invention is configured such that, if necessary, the side end terminal is formed in a side end recess that can be fitted with the power supply terminal of the electric motor section.

[0012] As described above, in this invention, since side end terminals are formed in side end recesses that can be mated with the power supply terminals of the electric motor section, the power supply terminals can be joined with side end terminals formed to surround the power supply terminals, and the control board can be supported more stably between the power supply terminals. Furthermore, when using an existing motor as the electric motor section, the distance between the power supply terminals may differ, but since side end terminals are also formed on the side end faces corresponding to both ends in the width direction of the power supply terminals, it becomes possible to join the power supply terminals with the side end terminals, thereby increasing the versatility of the control board. Moreover, since the control board can be formed in all areas of the planar area of ​​the electric motor section except for the side end recesses, the mounting area on the board can be maximized.

[0013] The motor device according to the present invention is configured such that, if necessary, the power supply terminals are erected at an angle toward the axis center such that the spacing between them narrows as they move toward the tip.

[0014] In this invention, the power supply terminals are installed at an angle toward the axis center so that the spacing between them narrows as they move toward the tip, making it difficult for the control board to come loose upwards from between the power supply terminals, and allowing the control board to be supported more stably between the power supply terminals.

[0015] The motor device according to the present invention is configured such that, if necessary, the side end terminal is formed on an inclined surface with an inclination angle greater than or equal to the inclination angle of the power supply terminal.

[0016] In this invention, since the side terminals are formed on an inclined surface with an inclination angle greater than or equal to that of the power supply terminal, when the inclined surface has the same inclination angle as the power supply terminal, the power supply terminal can come into surface-to-surface contact with the side terminal formed on the inclined surface, thereby further stabilizing the electrical connection between the side terminal and the power supply terminal. Furthermore, when the inclined surface has a greater inclination angle than the power supply terminal, it becomes easier to flow solder into the gap between the inclined surface and the power supply terminal, ensuring a reliable connection between the power supply terminal and the side terminal.

[0017] The motor device according to the present invention includes, if necessary, an auxiliary plate provided between the control board and the electric motor section, which has at least insulating and heat insulating properties and is supported by the power supply terminal.

[0018] Thus, in this invention, since an auxiliary plate having at least insulating and heat-insulating properties is disposed between the control board and the electric motor section, the heat generated in the electric motor section can be prevented by the auxiliary plate, thereby suppressing damage to the control board due to heat. [Brief explanation of the drawing]

[0019] [Figure 1] This is a schematic diagram of a motor device according to a first embodiment of the present invention, where (a) is a front view, (b) is a top view, and (c) is a side view of the control board. [Figure 2] This is a plan view showing another example of a control board in a motor device according to the first embodiment of the present invention. [Figure 3]It is a plan view showing another example of a control board in a motor device according to the first embodiment of the present invention. [Figure 4] It is a front view of a motor device according to the second embodiment of the present invention. [Figure 5] It is a schematic view showing another example of a motor device according to the second embodiment of the present invention, where (a) is a plan view, (b) is an enlarged front view of the main part along line A-A in (a), and (c) is an enlarged perspective view of the main part of the control board. [Figure 6] It is an enlarged front view of the main part showing another example of a motor device according to the second embodiment of the present invention. [Figure 7] It is a front view showing another example of a power supply terminal in a motor device according to the second embodiment of the present invention. [Figure 8] It is an enlarged side view of the main part showing another example of a power supply terminal in a motor device according to the second embodiment of the present invention. [[ID=1VI6]] [Figure 9] It is a front view of a motor device according to the third embodiment of the present invention. [[ID=1VI9]] [[ID=2l]]

MODE FOR CARRYING OUT THE INVENTION

[0020] (First Embodiment of the Present Invention) Hereinafter, a motor device according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Throughout this embodiment, the same elements are denoted by the same reference numerals.

[0021] [[ID=VO]] The motor device 1 according to this embodiment includes an electric motor unit 10 formed of a cylindrical body, and a control board 20 on which a control circuit formed of electronic components is mounted and which is disposed on one side in the driving shaft direction in the electric motor unit 10.

[0022] As the electric motor unit 10, a conventionally known electric motor can be used, and thus its details are omitted. For example, a brushed motor can be mentioned. Further, the electric motor unit 10 may include a speed-changing unit that decelerates or accelerates with a planetary gear mechanism or the like on the other side in the axial direction. <O000105>

[0023] On one side of the electric motor unit 10 in the drive shaft direction, a pair of substantially flat power supply terminals 13 are provided, protruding axially from near the periphery of the bearing bracket 11 and positioned opposite each other with the drive shaft 12 in between. Power from an external power source (not shown) is supplied to the electric motor unit 10 via these power supply terminals 13. In this embodiment, the drive shaft 12 is configured to extend axially along one side of the electric motor unit 10, longer than the power supply terminal 13. However, it is not limited to this configuration, and may extend to the other side of the electric motor unit 10. In this case, the control board 20, which will be described in detail later, does not require an insertion hole 24 for the drive shaft 12.

[0024] The control board 20 is formed as a circular plate-like body with a cross-sectional shape smaller than or equal to a circle in the direction perpendicular to the drive axis direction of the cylindrical body of the electric motor unit 10. The control board 20 is disposed on the plane of the circular plate-like substrate 21 and has a pair of power terminals 22 connected to an external power supply, and a pair of side end terminals 23 that are arranged opposite each other on the side end faces of the substrate 21 with the drive shaft 12 in between, and are energized by the current supplied from the pair of power terminals 22 based on the control of the control circuit. The side end terminals 23 only need to be formed on the side end faces of the substrate 21, and in the example shown in Figure 1, they are formed not only on the side end faces of the substrate 21 but also on the upper and lower surfaces of the substrate 21 so as to be continuous with them. Furthermore, a through hole 24 is formed in the center of the control board 20 for inserting the drive shaft 12 of the electric motor unit 10. The board 21 is formed to be smaller in diameter than the electric motor unit 10.

[0025] The control board 20 may be either a single-sided mounting board or a double-sided mounting board.

[0026] The side terminal 23 is electrically connected to the power supply terminal 13 of the electric motor unit 10 by a connecting member S. Methods for connecting the side terminal 23 and the power supply terminal 13 include solder leveling and plating, but from the viewpoint of workability on the side end surface of the control board 20, plating, such as electroless gold flash, is preferred. Note that in Figure 1(b), the connecting member S is omitted for the sake of explanation, and the connecting member S will also be omitted as appropriate in other drawings.

[0027] The control board 20 is positioned at a distance from the cylindrical bearing housing 14 in the bearing bracket 11 of the electric motor unit 10. However, from the viewpoint of stability, the control board 20 can also be positioned on top of the bearing housing 14. In this case, the control board 20 is a single-sided mounting board on which multiple electronic components are mounted on the flat surface of the board 21 opposite to the electric motor unit 10.

[0028] Furthermore, as shown in Figure 2, the control board 20 can also be shaped by cutting out two opposing arch-shaped portions from a circular board with approximately the same diameter as the electric motor unit 10 (also called a rounded rectangular shape or track shape). That is, the control board 20 is formed with parallel rectangular side surfaces facing each other. In this case, the side terminals 23 will be formed in the central portion of these parallel rectangular side surfaces. Thus, since the side end terminals 23 are formed on the side end surfaces of the control board 20, which consist of opposing parallel planes, the power supply terminals 13 and the side end terminals 23 can be joined surface to surface, allowing the control board 20 to be supported more stably between the power supply terminals 13. Furthermore, the control board 20 can be formed with the same size as the area extending between the power supply terminals 13 relative to the planar area of ​​the electric motor section 10, thereby increasing the mounting area on the board 21.

[0029] Furthermore, as shown in Figure 3(a), the control board 20 can also have a shape in which, at the center of each of the parallel rectangular side end faces of the control board 20 shown in Figure 2, there are side end recesses 25 that can be fitted with the power supply terminals 13 of the electric motor unit 10, which are formed by cutting out a rectangular shape from the board 21. The side end terminals 23 are formed on all the side end faces (three side end faces) surrounding the side end recesses 25, but it is sufficient that they are formed on at least the side end face on the central side of the board 21 (the side end face parallel to and opposite the power supply terminals 13). Furthermore, as shown in Figure 3(b), the control board 20 can also have a shape in which opposing peripheral portions of the circular board 21 are cut out in a roughly rectangular shape, resulting in side edge recesses 25.

[0030] The shape of the side edge recess 25 is not limited to a rectangular shape; it may also be trapezoidal, inverted trapezoidal, semicircular, etc. In particular, if the shape of the side edge recess 25 is an inverted trapezoid, that is, if the side closer to the center of the substrate is longer than the two opposing sides, and the shape narrows towards the outside of the substrate, the control board 20 can be positioned more stably between the power supply terminals 13.

[0031] The distance between the side end recesses 25 is formed to be slightly smaller than the distance between the power supply terminals 13, and the width of each side end recess 25 (width in the vertical direction of the paper) is formed to be larger than the width of each power supply terminal 13. Thus, since the side end terminals 23 are formed in the side end recesses 25 that can be mated with the power supply terminals 13 of the electric motor section 10, the power supply terminals 13 can be joined by the side end terminals 23 that are formed to surround the power supply terminals 13, and the control board 20 can be supported more stably between the power supply terminals 13. Furthermore, when using an existing motor as the electric motor section 10, the distance between the power supply terminals 13 may differ, but since side end terminals 23 are also formed on the side end faces corresponding to both ends in the width direction of the power supply terminals 13, it becomes possible to join the power supply terminals 13 and the side end terminals 23, thereby increasing the versatility of the control board 20. Moreover, since the control board 20 can be formed in all areas of the planar region of the electric motor section 10 except for the side end recesses 25, the mounting area on the board 21 can be maximized.

[0032] As described above, the motor unit 10 and the control board 20 are provided, and the power supply terminals 13 and the side end terminals 23 are electrically connected at the side end face of the control board 20. Therefore, the motor unit 10 and the control board 20 can be integrated simply by inserting the control board 20 between the power supply terminals 13 and connecting them. This simplifies the mounting configuration of the control board 20, simplifies the installation work, and makes the motor device 1 more compact.

[0033] (Second embodiment of the present invention) In the motor device according to the first embodiment described above, the power supply terminals of the electric motor section were configured to extend parallel to the axial direction. However, the configuration is not limited to this, and as shown in Figures 4 to 7, the power supply terminals can also be configured to be inclined toward the axial center as they approach their tip. In the following description, any configurations that overlap with the first embodiment described above will be omitted.

[0034] In this embodiment, the motor device 1 has power supply terminals 13 of the electric motor unit 10 arranged such that the spacing between the power supply terminals 13 is greatest on the base end side, which is on the bearing bracket 11 side, and smallest on the tip side, which is on the opposite side of the bearing bracket 11, as shown in Figure 4. In other words, the power supply terminals 13 are arranged at an inclination toward the shaft center (drive shaft 12) so that the spacing between the power supply terminals 13 decreases as they move toward the tip side.

[0035] The distance between the side terminals 23 of the control board 20, which are electrically connected to the power supply terminals 13, is greater than the distance between the tips of the power supply terminals 13. To attach the control board 20 to the electric motor unit 10, the tips of the power supply terminals 13 of the electric motor unit 10 are slightly spread outward, and the control board 20 is inserted between the spread power supply terminals 13 and slid to a predetermined position and soldered, thereby joining the side terminals 23 of the control board 20 to the power supply terminals 13 of the electric motor unit 10.

[0036] Furthermore, if the power supply terminals 13 of the electric motor unit 10 are arranged at an angle, an inclined surface 26 can be provided on the side end face of the substrate 21, as shown in Figure 5, and the side end terminals 23 can be arranged on the inclined surface 26. Note that in Figure 5(c), only the control board 20 is shown for the sake of explanation.

[0037] The inclined surface 26 is formed by partially cutting out the side edge of the substrate 21, and is shaped to slope downward toward the outside of the substrate 21, corresponding to the inclination of the power supply terminal 13. The inclination angle θ1 of the inclined surface 26 is set to be greater than or equal to the inclination angle θ2 of the power supply terminal 13. Here, the inclination angle is the angle with respect to the vertical direction V (the same direction as the drive axis direction).

[0038] When the inclination angle θ1 of the inclined surface 26 and the inclination angle θ2 of the power supply terminal 13 are the same (θ1=θ2), the side end terminal 23 formed on the inclined surface 26 and the power supply terminal 13 will face each other in parallel, maximizing the contact area via the joining member S.

[0039] When the inclination angle θ1 of the inclined surface 26 is greater than the inclination angle θ2 of the power supply terminal 13 (θ1 > θ2), a gap will be formed between the side end terminal 23 formed on the inclined surface 26 and the power supply terminal 13 due to the difference in inclination angles, as shown in Figure 6. This gap will be larger from the bottom side to the top side of the control board 20. The joining member S will be poured into the gap that is formed between the side end terminal 23 and the power supply terminal 13 and is expanding towards the top side.

[0040] In the examples shown in Figures 5 and 6, the inclined surface 26 is formed on the parallel rectangular side end face of the control board 20, but the inclined surface 26 can also be formed on the side end face on the axial center side of the side end recess 25 as described above.

[0041] Furthermore, the power supply terminal 13 of the electric motor unit 10 can also be bent in shape, as shown in Figure 7. Each power supply terminal 13 is bent inward towards the motor device 1 near the central portion, and the spacing between the power supply terminals 13 is largest in the central portion and narrows towards the tip and base ends. This allows the vertical displacement of the control board 20 to be restricted by the power supply terminals 13, which are spaced narrower at the tip and base ends, thereby providing stable support for the control board 20.

[0042] Furthermore, as shown in Figure 8, the power supply terminal 13 of the electric motor unit 10 can also have a polygonal shape in which the width is narrowest in the central part of the power supply terminal 13, and the width increases from this central part toward the tip and base ends. This allows the vertical positional displacement of the control board 20 to be restricted by the power supply terminal 13, which has a wider width toward the tip and base ends, and the control board 20 can be stably supported.

[0043] As described above, the power supply terminals 13 are installed at an angle toward the axis center so that the spacing between them narrows as they move toward the tip, making it difficult for the control board 20 to come loose upwards from between the power supply terminals 13, and allowing the control board 20 to be supported more stably between the power supply terminals 13.

[0044] Furthermore, since the side terminals 23 are formed on an inclined surface 26 whose inclination angle is greater than or equal to that of the power supply terminal 13, if the inclined surface 26 has the same inclination angle as the power supply terminal 13, the power supply terminal 13 can come into surface-to-surface contact with the side terminals 23 formed on the inclined surface 26, thereby further stabilizing the electrical connection between the side terminals 23 and the power supply terminal 13. Also, if the inclined surface 26 has a greater inclination angle than the power supply terminal 13, it becomes easier to flow solder into the gap between the inclined surface 26 and the power supply terminal 13, ensuring a secure connection between the power supply terminal 13 and the side terminals 23.

[0045] (Third embodiment of the present invention) In the motor device according to the first embodiment described above, the configuration was such that only the control board was held between the power supply terminals of the electric motor section. However, the configuration is not limited to this, and as shown in Figure 9, an insulating auxiliary plate can also be provided between the power supply terminals. In the following description, any configurations that overlap with the first embodiment described above will be omitted.

[0046] As shown in Figure 9, the motor device 1 according to this embodiment is configured with an auxiliary plate 30 having at least insulating properties between a control board 20 supported between the power supply terminals 13 of the electric motor unit 10 and the electric motor unit 10 (bearing bracket 11). The auxiliary plate 30 is fixed to the power supply terminals 13 with an insulating adhesive or the like. Since the control board 20 and the auxiliary plate 30 are arranged at a distance from each other, the control board 20 can be mounted on both sides. Alternatively, the control board 20 and the auxiliary plate 30 can be arranged so that the bottom surface of the control board 20 and the top surface of the auxiliary plate 30 are in close contact, in which case the control board 20 is mounted on one side.

[0047] This auxiliary plate 30 has at least insulating properties, but is also formed to have other functions, such as heat insulation or vibration damping properties. Materials with insulating, heat-insulating, and vibration-damping properties include synthetic resins such as silicone rubber, foamed polyurethane, and phenolic resin, as well as glass fiber reinforced plastics.

[0048] The shape of the auxiliary plate 30 does not need to be the same as that of the control board 20, and it can be made larger than the control board 20. For example, the auxiliary plate 30 can be circular in shape with the same diameter as the electric motor section 10, and the power supply terminal 13 can be inserted through a through hole that penetrates from the top surface to the bottom surface of the auxiliary plate 30.

[0049] As described above, since the auxiliary plate 30, which has at least insulating and heat-insulating properties, is disposed between the control board 20 and the electric motor unit 10, the heat generated in the electric motor unit 10 can be prevented by the auxiliary plate 30, thereby suppressing damage to the control board 20 due to heat. Furthermore, if the auxiliary plate 30 has vibration-damping properties, it can absorb vibrations from the electric motor unit 10 and improve quietness.

[0050] Furthermore, the above embodiments can be used in combination as appropriate. [Explanation of Symbols]

[0051] 1. Motor device 10 Electric motor section 11. Bearing bracket 12 drive shafts 13 Power supply terminal 14 Bearing housing 20 Control board 21 circuit boards 22 Power terminal 23 Side end terminal 24 Through hole 25 Side edge recess 26 Slope 30 Auxiliary plate S Joining member

Claims

1. The electric motor section consists of a cylindrical body, The electric motor section comprises a control circuit made of electronic components and a control board located on one side of the drive axis direction, The electric motor section has a pair of power supply terminals arranged opposite each other on one side in the drive axis direction, with the drive shaft in between. The motor device is characterized in that the control board is formed from a plate-like body having a cross-sectional shape smaller than or equal to the circular cross-sectional shape of the cylindrical body of the electric motor section, and is disposed on the plane of the plate-like body and has a pair of power terminals connected to an external power supply, and a pair of side terminals that are electrically connected to the power supply terminals at their side end faces and through which current supplied from the pair of power terminals is passed based on the control of the control circuit.

2. In the motor device according to claim 1, A motor device characterized in that the side end terminals are formed on the side end surfaces of the control board, which consist of opposing parallel planes.

3. In the motor device according to claim 1, A motor device characterized in that the side end terminal is formed in a side end recess that can be fitted with the power supply terminal of the electric motor section.

4. In the motor device according to claim 1, A motor device characterized in that the power supply terminals are erected at an angle toward the axis center such that the spacing between them narrows as they move toward the tip.

5. In the motor device according to claim 4, A motor device characterized in that the side end terminal is formed on an inclined surface whose inclination angle is greater than or equal to that of the power supply terminal.

6. In the motor device according to claim 1, A motor device characterized in that an auxiliary plate having at least insulating and heat insulating properties is disposed between the control board and the electric motor section and is supported by the power supply terminal.

Images