Motor terminal box

Abstract

To provide a terminal box of a motor that can further increase the degree of freedom of changing the direction of a box body part to an electric motor.SOLUTION: The terminal box of the motor according to an embodiment includes: a box body part in the shape of a box; and a fixation member for fixing the box body part to the motor. The fixation member includes: a box body part side attachment unit attached to the box body part; a fastening member for fastening the box body part and the box body part side attachment unit to each other; and an insertion hole unit through which the fastening member is inserted. The fastening member can adjust the fastening position for fastening the box body part and the box body part side attachment unit to each other in the insertion hole.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a terminal box provided in an electric motor. [Background technology]

[0002] The electric motor has a terminal box on a frame that forms the outer shell of the motor, and the tip ends of the lead wires extending from the electric motor are housed inside the terminal box.

[0003] With this type of terminal box for an electric motor, for example, during installation, there may be a need to suddenly change the orientation of the terminal box relative to the motor. However, this type of terminal box is fixed to the frame of the electric motor at multiple fixing points, for example, four fixing points, with fastening members such as bolts. Therefore, the orientation of the terminal box relative to the electric motor cannot be easily changed, and even if it were possible to change it, the possible orientation of the terminal box would be restricted by the positions of the multiple fixing points. Therefore, the degree of freedom in changing the orientation of the terminal box relative to the electric motor is extremely low.

[0004] Therefore, for example, Patent Document 1 discloses a terminal box configuration that includes a rectangular bottom plate portion fixed to the frame of an electric motor and a rectangular box-shaped box body portion attached to the bottom plate portion so that its orientation can be changed. With this configuration, the orientation of the box body portion relative to the bottom plate portion can be easily changed, and therefore the orientation of the box body portion relative to the electric motor can be easily changed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-23240 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the configuration of Patent Document 1, the orientation of the rectangular box-shaped box body relative to the rectangular plate-shaped bottom plate can only be changed in 90-degree increments, and therefore the orientation of the box body can only be changed in four directions. Therefore, even if the configuration of Patent Document 1 is applied, the degree of freedom in changing the orientation of the box body relative to the electric motor is still limited.

[0007] Therefore, it is an object of the present invention to provide a terminal box for an electric motor that allows for greater freedom in changing the orientation of the box body portion relative to the electric motor. [Means for solving the problem]

[0008] The terminal box of the electric motor in this embodiment comprises a box-shaped box body portion and a fixing member that fixes the box body portion to the electric motor, and the fixing member comprises a box body side mounting portion that is attached to the box body portion, a fastening member that fastens the box body portion and the box body side mounting portion, and an insertion hole portion through which the fastening member is inserted, and is configured so that the fastening position at which the fastening member fastens the box body portion and the box body side mounting portion within the insertion hole portion can be adjusted. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a vertical cross-sectional view schematically illustrating an example of the configuration of a terminal box of an electric motor according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram illustrating an example of the configuration of an electric motor-side mounting portion according to an embodiment of the present invention; [Figure 3] FIG. 10 is a diagram illustrating an example of the configuration of a box-body-side mounting portion according to the present embodiment. [Figure 4] FIG. 1 is a diagram illustrating an example of the configuration of a packing according to an embodiment of the present invention. [Figure 5] 1 is an enlarged schematic view showing an example of the configuration of grooves and protrusions according to the present embodiment; FIG. [Figure 6] 10A and 10B are diagrams illustrating an example of changing the orientation of the box body relative to the electric motor according to the embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of a terminal box for an electric motor will be described below with reference to the drawings. The electric motor terminal box 10 shown in FIG. 1 includes a box body 11 and an intermediate member 12. The box body 11 constitutes the main body of the terminal box 10 and is formed in the shape of a hollow rectangular box. The box body 11 is a metal member. The box body 11 accommodates, for example, a tip end 101a of a lead wire 101 extending from the electric motor 100 side.

[0011] The intermediate member 12 is an example of a fixing member, and is a component for fixing the box-body portion 11 to a frame 102 of the electric motor 100. The frame 102 is a metal member that forms the outer shell of the electric motor 100. The intermediate member 12 is a metal member, and in this case, is integrally provided with a tubular portion 13, a motor-side plate-like portion 14, and a box-body-side plate-like portion 15.

[0012] The tubular portion 13 is formed in the shape of a hollow circular tube, and extends linearly between the box body portion 11 and the frame 102 of the electric motor 100. For example, a lead wire 101 extending from the electric motor 100 side can be inserted into the inside of the tubular portion 13.

[0013] The motor-side plate-like portion 14 is an example of a motor-side mounting portion, and is provided on one longitudinal end side of the tubular portion 13, in this case, on the side of the electric motor 100. On the other hand, the box-side plate-like portion 15 is an example of a box-side mounting portion, and is provided on the other longitudinal end side of the tubular portion 13, in this case, on the side of the box body 11. The intermediate member 12 is configured so that the motor-side plate-like portion 14 is mounted to the frame 102 of the electric motor 100, and the box-side plate-like portion 15 is mounted to the box body 11, thereby firmly fixing the box body 11 to the frame 102 at the intermediate portion between the box body 11 and the frame 102.

[0014] Next, a configuration example of the motor-side plate-shaped portion 14 will be described in detail. FIG. 2 shows a configuration example of the motor-side plate-shaped portion 14 as seen from the electric motor 100 side. As illustrated in FIG. 2, the motor-side plate-shaped portion 14 is formed in a rectangular plate shape along a direction perpendicular to the axial direction of the tubular portion 13. The motor-side plate-shaped portion 14 is provided with a plurality of bolt holes 14a, in this case, four bolt holes 14a. Each of the bolt holes 14a penetrates the motor-side plate-shaped portion 14 in the plate thickness direction. Each of the bolt holes 14a is formed in a circular shape. All of the bolt holes 14a are provided in a portion of the motor-side plate-shaped portion 14 that is outside the tubular portion 13. The bolt holes 14a are arranged at equal intervals from one another along the circumferential direction of the tubular portion 13.

[0015] Next, a configuration example of the box-body side plate portion 15 will be described in detail. FIG. 3 shows a configuration example of the box-body side plate portion 15 as seen from the box-body 11 side. As illustrated in FIG. 3, the box-body side plate portion 15 is formed in a rectangular plate shape along a direction perpendicular to the axial direction of the tubular portion 13. The box-body side plate portion 15 is provided with a plurality of elongated holes 15a, in this case, four elongated holes 15a. Each of the elongated holes 15a penetrates the box-body side plate portion 15 in the plate thickness direction. Each of the elongated holes 15a is formed in an arc shape along the circumferential direction of the tubular portion 13. All of the elongated holes 15a are provided in portions of the box-body side plate portion 15 that are outside the tubular portion 13. The elongated holes 15a are arranged at equal intervals along the circumferential direction of the tubular portion 13.

[0016] The box-side plate-like portion 15 is integrally provided with a groove 15b. The groove 15b is formed in an annular shape along the circumferential direction of the tubular portion 13. The groove 15b is provided outside the tubular portion 13 and inside the plurality of long holes 15a.

[0017] 1, the motor-side plate-shaped portion 14 has a plurality of bolt holes 14a which are fastened to the frame 102 of the electric motor 100 by bolts 14b, respectively. The bolts 14b are an example of fastening members for fastening the frame 102 of the electric motor 100 to the motor-side plate-shaped portion 14. Inside the frame 102 of the electric motor 100, the tips of the bolts 14b are tightened by nuts (not shown).

[0018] Meanwhile, the box body side plate-shaped portion 15 has a plurality of elongated hole portions 15a which are fastened to the box body 11 by bolts 15c, respectively. The bolts 15c are an example of a fastening member for fastening the box body 11 to the box body side plate-shaped portion 15. The plurality of elongated hole portions 15a are an example of insertion holes through which the bolts 15c, which are an example of a fastening member, are inserted. Inside the box body 11, the tip portions of the bolts 15c are tightened by nuts 15d.

[0019] 1, the terminal box 10 further includes a packing 16. The packing 16 is made of a watertight material such as rubber. The packing 16 is an example of a liquid intrusion prevention member, and in this case, is attached so as to be sandwiched between the box body portion 11 and the box body side plate portion 15.

[0020] Next, a configuration example of the packing 16 will be described in detail. FIG. 4 shows a configuration example of the packing 16 as seen from the electric motor 100 side. As illustrated in FIG. 4, the packing 16 is formed in a rectangular plate shape along a direction perpendicular to the axial direction of the tubular portion 13. The packing 16 is provided with a plurality of bolt holes 16a, in this case, four. Each of the plurality of bolt holes 16a penetrates the packing 16 in the plate thickness direction. Each of the plurality of bolt holes 16a is formed in a circular shape. Each of the plurality of bolt holes 16a is provided in a portion of the packing 16 that is outside the tubular portion 13. The plurality of bolt holes 16a are arranged at equal intervals from one another along the circumferential direction of the tubular portion 13. Bolts 15c that fasten the box body portion 11 to the box body side plate portion 15 are inserted into each of the plurality of bolt holes 16a.

[0021] The packing 16 also has an integral protrusion 16b. The protrusion 16b is formed in an annular shape along the circumferential direction of the tubular portion 13. As illustrated in FIG. 5, when the packing 16 is interposed between the box body portion 11 and the box body side plate portion 15, the protrusion 16b fits into the groove 15b of the box body side plate portion 15. The protrusion 16b configured in this manner can be defined as an example of a fitting portion configured to be able to fit into the groove 15b of the box body side plate portion 15.

[0022] According to the configuration example of the terminal box 10 illustrated above, the elongated hole portion 15a is elongated along the circumferential direction of the tubular portion 13. According to this configuration example, as illustrated in "Rotation Example A" and "Rotation Example B" in FIG. 6, the position of the bolt 15c within the elongated hole portion 15a, in other words, the fastening position within the elongated hole portion 15a at which the bolt 15c fastens the box portion 11 to the box-portion side plate portion 15, can be adjusted as desired. This allows the box portion 11 to be attached to the frame 102 of the electric motor 100 by appropriately rotating it in the directions of arrows R1 and R2. Therefore, according to the configuration example of the terminal box 10 according to the present disclosure, the orientation of the box portion 11 relative to the electric motor 100, in other words, the degree of freedom in changing the attachment direction of the box portion 11 relative to the electric motor 100, can be further increased compared to conventional configurations.

[0023] Furthermore, according to the exemplary configuration of the terminal box 10, the packing 16 can prevent liquids such as water from entering the box body portion 11 or the tubular portion 13 through the elongated hole portion 15a. Here, according to the terminal box 10 according to the present disclosure, the longer the elongated hole portion 15a, the greater the range in which the orientation of the box body portion 11 can be changed. However, the longer the elongated hole portion 15a, the more easily liquids such as water can enter through the elongated hole portion 15a.

[0024] According to the configuration example of the terminal box 10 according to the present disclosure, the infiltration of liquid through the elongated hole portion 15a is prevented by the packing 16. Therefore, while the elongated hole portion 15a is provided long to ensure a wide range in which the orientation of the box body portion 11 can be changed, the infiltration of liquid through the elongated hole portion 15a can be sufficiently suppressed.

[0025] Furthermore, according to the configuration example of the terminal box 10, when the packing 16 is interposed between the box body portion 11 and the box body side plate portion 15, the convex portion 16b of the packing 16 fits into the groove portion 15b of the box body side plate portion 15. According to this configuration example, even if liquid seeps in through the elongated hole portion 15a, the liquid can be blocked at the portion where the groove portion 15b and the convex portion 16b fit together. This makes it possible to more reliably prevent liquid from seeping into the box body portion 11 and the tubular portion 13.

[0026] The embodiment of the present disclosure is not limited to the above-described embodiment, and modifications and extensions can be made as appropriate without departing from the spirit and scope of the present disclosure. For example, the terminal box 10 may be configured such that the gasket 16 includes a groove and the box-side plate portion 15 includes a fitting portion. The length of the elongated hole 15a can be changed as appropriate. The number of elongated holes 15a can be changed as appropriate, for example, to one or to two or more. The terminal box 10 may also be configured such that a flat washer is provided in the elongated hole 15a at a fastening position where the bolt 15c fastens the box portion 11 and the box-side plate portion 15.

[0027] Although the embodiments of the present invention have been described above, these embodiments are presented merely as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. The present embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions described in the claims and their equivalents. [Explanation of symbols]

[0028] In the drawings, 10 indicates a terminal box of the electric motor, 11 indicates a box body portion, 12 indicates an intermediate member (fixing member), 15 indicates a box body side plate-shaped portion (box body side mounting portion), 15a indicates a long hole portion (insertion hole portion), 15b indicates a groove portion, 15c indicates a bolt (fastening member), 16 indicates a gasket (liquid intrusion prevention member), 16b indicates a convex portion (fitting portion), and 100 indicates an electric motor.

Claims

1. a box-shaped box body portion; a fixing member that fixes the box body to the electric motor; Equipped with The fixing member is a box-body-side mounting portion attached to the box-body portion; a fastening member that fastens the box body portion and the box body portion side mounting portion; an elongated insertion hole portion through which the fastening member is inserted; a liquid infiltration prevention member that prevents liquid from infiltrating through the insertion hole; Equipped with The terminal box of the electric motor is configured so that the fastening position at which the fastening member fastens the box body portion and the box body portion side mounting portion within the insertion hole portion can be adjusted.

2. a groove portion provided in one of the box-side mounting portion and the liquid intrusion prevention member; a fitting portion provided on the other of the box-side mounting portion and the liquid intrusion prevention member, the fitting portion being configured to be able to fit into the groove portion; The terminal box for an electric motor according to claim 1 , further comprising:

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