JP2009273333A - Motor terminal box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor terminal box in which the position of a terminal block can be changed by changing the direction of a board carrying the terminal block and a distance from a cable outlet to the terminal block is increased to solve the conventional problem that wiring is difficult. <P>SOLUTION: The motor terminal box 3 is attached to the outer peripheral surface of a motor housing 10 and has the built-in terminal block 40 that connects an inner lead wire led out from a motor body to an external cable pulled into the terminal box 3 from outside. The terminal box 3 includes a pedestal 30 mounted on the outer peripheral surface of the motor housing 10, a terminal box outer frame 31 which is attached detachably to the pedestal 30 and has a cable outlet 44, and a lid 32 which is attached to the terminal box outer frame 31 to close up the terminal box 3 airtightly. The board 41 carrying the terminal block 40 is attached detachably to the pedestal 30, with a mounting portion of the board 41 to the pedestal 30 formed to be point symmetrical so that the board 41 can be reversed in the front-to-rear direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor terminal box.

Conventionally, as this type of motor terminal box, Japanese Patent Application Laid-Open No. 57-025133 (Patent Document 1) or Japanese Patent Application Laid-Open No. 2004-056843 (Patent Document 2) is known.
In Patent Document 1, since the terminal box is formed in a square shape and the terminal plate is formed so as to be attachable in two directions rotated by 90 ° from the original position, the external lead wire can be drawn out in either direction. Are listed.
Patent Document 2 proposes a terminal box that is a square terminal box composed of a base 3, an electric wire insertion member 10, and a lid 13 and that can direct electric wire insertion holes in four directions.
Japanese Patent Laid-Open No. 57-025133 Japanese Patent Application Laid-Open No. 2004-056843

However, in such a conventional motor terminal box, since the terminal block is installed in the center of the terminal box, there is a problem that the distance from the cable outlet to the terminal block is short and wiring work is difficult. there were.
Further, since the lead wire of the motor is fixed on the same surface as the terminal block, there is a problem that a space for wiring is narrowed.
Furthermore, there is a problem that the number of cable outlets is limited to one.
Furthermore, there is a problem that there is no protective ground terminal.

  The present invention solves the above-mentioned problems and can change the position of the terminal block by changing the direction of the board on which the terminal block is mounted, and the wiring can be increased by increasing the distance from the cable outlet to the terminal block. An object of the present invention is to provide a motor terminal box that can solve the conventional problem that it is difficult to prevent.

In order to solve the above problems, the present invention is a motor terminal box that is attached to the outer peripheral surface of a motor housing and that has a built-in terminal block for connecting an internal lead wire drawn from the motor body and an external cable drawn from the outside. The terminal box is mounted on the outer peripheral surface of the motor housing, and is detachably assembled to the pedestal, and the terminal box outer frame provided with a cable outlet, and the terminal box outer frame. And a lid that hermetically seals the interior of the board, and the board on which the terminal block is mounted is detachably assembled to the pedestal, and the direction of the board can be reversed. This is because the mounting portion is formed point-symmetrically.
Further, the present invention resides in that the internal lead wire drawn out from the motor body is electrically connected to the terminal of the terminal block on the surface opposite to the surface on which the terminal block of the substrate is arranged.
Furthermore, the present invention lies in that the terminal block is provided along one side of the substrate so as to be point-symmetric when the front and back of the substrate are reversed.
Furthermore, in the present invention, the terminal box is formed in a square shape, and a cable outlet is provided in the outer frame of the terminal box, and the outer frame of the terminal box is configured to be rotatable by a quarter turn. is there.
In the present invention, ribs are provided on the inner surface of the outer frame of the terminal box so as to correspond to both sides of the cable outlet so that the cable outlet can be fixed to the outer frame of the terminal box.
Furthermore, the present invention provides two ribs corresponding to both sides of the cable outlet on the inner surface of the outer frame of the terminal box so that one cable outlet can be fixed to one side of the outer frame of the terminal box. That is, three ribs are provided corresponding to the cable outlets so that the two cable outlets can be fixed to the inner surface of the outer frame on the opposite side.
Still further, according to the present invention, the board is screwed to the pedestal portion via a board fixing screw, and one of the board fixing screws has a function of a protective ground terminal.

The present invention has the following effects.
According to the first aspect of the present invention, the terminal box is mounted on the outer peripheral surface of the motor housing, the terminal box outer frame provided with a cable outlet, and is detachably assembled to the base part. It is assembled with a lid that is assembled to the outer frame of the terminal box and hermetically seals the inside, and the substrate on which the terminal block is mounted is detachably assembled to the pedestal portion, so that the front-rear direction of the substrate can be reversed, Since the mounting part of the board with respect to the pedestal is formed point-symmetrically, the position of the terminal block can be changed by changing the direction of the board on which the terminal block is mounted, and the distance from the cable outlet to the terminal block can be changed. By increasing the length, the conventional problem that wiring is difficult can be solved.
According to the invention of claim 2, since the internal lead wire led out from the motor body is electrically connected to the terminal of the terminal block on the surface opposite to the surface on which the terminal block of the substrate is arranged, the wiring space is reduced. The conventional problem of narrowing can be solved.
According to the invention of claim 3, since the terminal block is provided along one side of the substrate so as to be point-symmetric when the front and rear of the substrate are reversed, the distance from the cable outlet to the terminal block is increased. By doing so, wiring work can be performed easily.
According to the invention of claim 4, since the terminal box is formed in a square shape, a cable outlet is provided in the outer frame of the terminal box, and the outer frame of the terminal box is configured to be rotatable by a quarter turn. The cable outlet can be directed in any direction.
According to the invention of claim 5, since the ribs are provided on the inner surface of the outer frame of the terminal box so as to be fixed to the both sides of the cable outlet so that the cable outlet can be fixed to the outer frame of the terminal box. The mouth can be reinforced.
According to the invention of claim 6, two ribs corresponding to both sides of the cable outlet are provided on the inner surface of the outer frame of the terminal box so that one cable outlet can be fixed to one surface of the outer frame of the terminal box. Since the three ribs are provided corresponding to the cable outlets so that the two cable outlets can be fixed to the inner surface of the outer frame on the opposite side, the cable outlet can be reinforced.
According to the invention of claim 7, since the board is fixed to the pedestal portion via the board fixing screw, and one of the board fixing screws has a function of a protective grounding terminal. The protective ground terminal can be connected using one of the screws.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a motor terminal box, FIG. 2 is a plan view showing the cover of FIG. 1 removed, and FIG. 3 is an exploded perspective view showing the motor terminal box. 4 is a longitudinal sectional view showing a state in which the front and rear directions of the terminal box outer frame and the substrate are reversed (rotated by 180 °), FIG. 5 is a plan view with the cover of FIG. 4 removed, and FIG. (B) (c) is a top view which shows the state which changed the direction of the terminal box outer frame for every quarter rotation.

  1 to 3, reference numeral 1 denotes a motor, which includes a motor body 2 and a motor terminal box 3. In the motor main body 2, a motor case 11 is constituted by a motor housing 10 and an end bracket 10a. A stator 12 and a rotor 13 are provided in the motor case 11, and output is taken out via a rotating shaft (output shaft) 14 attached to the rotor 13. The rotating shaft 14 is supported via rotating shaft bearings 15 disposed in boss portions 11 a and 11 b provided in the motor case 11. An internal lead wire 16 a serving as a power cable is connected to the stator winding 16 of the stator 12, and the internal lead wire 16 a is drawn out through a hole 17 formed in the upper surface of the motor housing 10. Yes. A motor terminal box 3 is provided on the upper surface of the hole 17 of the motor housing 10, and the internal lead wire 16 a is introduced into the motor terminal box 3. Usually, the internal lead wire 16a includes a signal cable for controlling the motor in addition to the power cable.

  The motor terminal box 3 includes a pedestal portion 30 mounted on the outer peripheral surface of the motor housing 10, a terminal box outer frame 31 assembled to the pedestal portion 30, and a terminal box outer frame 31 assembled to seal the inside. It is comprised with the cover body 32. FIG. The motor terminal box 3 is configured in a square shape in plan view, and a substrate 41 on which a terminal block 40 is mounted is incorporated.

  The pedestal portion 30 is provided on the upper surface of the motor housing 10, and a hole 30 a that faces the hole 17 of the motor housing 10 is provided. The internal lead wire 16a is introduced into the motor terminal box 3 through the hole 17 and the hole 30a. The pedestal portion 30 is provided with a seat portion 33 having screw holes 33a formed at four corners of a rectangular plate surface. Seat portions 34 projecting from the inner four corners of the terminal box outer frame 31 are provided at positions corresponding to the seat portions 33, and screw holes 34 a of the seat portion 34 are provided corresponding to the screw holes 33 a of the seat portion 33. ing. The pedestal portion 30 is fastened to each other with screws 35 such that the screw holes 33 a are aligned with the screw holes 34 a of the seat portion 34 of the terminal box outer frame 31. A protective ground terminal 36 is attached to the pedestal 30 on the side of one seat 33. Screw holes 37a are screwed into the thick portions 37 at the four corners of the terminal box outer frame 31, and the lid body 32 is screwed into the screw holes 37a. Screw holes 38 a are formed at the four corners of the lid 32, and screws 39 inserted through the screw holes 38 a are screwed into the screw holes 37 a of the terminal box outer frame 31.

  The substrate 41 is provided with a terminal block 40 along one side of the plate surface, and the terminal block 40 is provided with a plurality of cable terminals 42 (three in the illustrated example) for connecting cables. . The cable terminal 42 is provided with a lower end protruding from the back side of the substrate 41. On the back side of the substrate 41, an internal lead wire 16 a drawn out from the motor case 11 is connected to the cable terminal 42. The substrate 41 is formed by cutting out four corners of a rectangular substrate, and screw holes are formed as attachment portions on the three notch portions 41a side of the substrate 41, and screws 43 are formed in these screw holes. It is inserted and screwed to the pedestal portion 30. The cutout portion 41b at one location of the substrate 41 is formed to be largely cut away so as to avoid the mounting position of the protective ground terminal 36 attached to the pedestal portion 30. The shape of the substrate 41 is formed to be point-symmetric when the front-rear direction of the substrate 41 is reversed, that is, rotated by 180 °, and the position of the terminal block 40 is also point-symmetric. Is attached. The terminal block 40 is assembled to the end portion of the substrate 41 along one side surface of the terminal box outer frame 31. When the substrate 41 is reversed and rotated 180 °, the terminal block 40 is opposite to the terminal block 40. It is attached point-symmetrically so as to change its position to the side.

  A cable lead-out port 44 is provided in an opening (not shown) on one side of the terminal box outer frame 31, and the external cable 50 is connected to the cable terminal 42 of the terminal block 40 through the cable lead-out port 44. . The cable outlet 44 is formed by cutting a screw on the outer surface of the pipe 45 and screwing two nuts 46 and 47 to the screw 45 so that the pipe 45 is clamped to the wall surface 31a of the terminal box outer frame 31 from both sides. It is fixed.

The procedure for assembling the motor terminal box will be described.
The motor terminal box 3 includes a pedestal portion 30 mounted on the outer peripheral surface of the motor housing 10, a terminal box outer frame 31 assembled to the pedestal portion 30, and a lid body 32 assembled to the terminal box outer frame 31. And are each assembled by screwing. The internal lead wire 16 a drawn from the motor case 11 is connected to the cable terminal 42 of the terminal block 40 inside the motor terminal box 3 on the lower surface side of the substrate 41.

  When connecting the external cable 50 for sending power or signals when installing the motor 1, the lid 32 of the motor terminal box 3 is removed, and the cable outlet 44 of the terminal box outer frame 31 and the direction of drawing the external cable 50 are removed. The direction of the terminal box outer frame 31 is determined. 6 (a), 6 (b), and 6 (c) are diagrams in which the direction of the terminal box outer frame 31 is changed by a quarter rotation, that is, by 90 °. FIG. ) A cable outlet 44 is arranged on the left side of 14. FIG. 6B shows a cable outlet 44 disposed on the opposite side of the rotating shaft (output shaft) 14. FIG. 6C shows a cable outlet 44 arranged on the right side of the output side of the rotary shaft 14. In this case, all of the terminal blocks 40 are arranged closer to the output side of the rotating shaft 14.

Depending on the direction of the terminal box outer frame 31, the front and rear directions of the substrate 41 are reversed, that is, rotated by 180 °, so that the position of the terminal block 40 is changed. 1, 2, 4, and 5 show the state of the rotary shaft (output shaft) 14 from the state where the cable outlet 44 is disposed on the opposite side of the rotary shaft (output shaft) 14 (see FIGS. 1 and 2). The state (refer FIG. 4 and FIG. 5) which changed the cable outlet 44 to the direction is shown.
The shape and the mounting position of the board 41 are formed so as to be point-symmetric when the front and rear directions of the board 41 are reversed, that is, rotated by 180 °. Moves far away from the cable outlet 44. Thus, the external cable 50 can be easily connected to the cable terminal 42 of the terminal block 40.

FIG. 7 shows another embodiment of the present invention. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description of the same parts is omitted.
In this case, the cable outlet 44 is provided at one place on one side of the terminal box outer frame 31 and at two places on the opposite surface, and the periphery of the nut 47 is reinforced by the rib 51. Reinforcing ribs 51 are provided on both sides of the nut 47 at one cable outlet 44. Further, three ribs 51 are alternately provided on the opposite surface across the nut 47, and the two cable outlets 44 are reinforced by the three ribs 51, respectively.

8 and 9 show another embodiment of the present invention. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description of the same parts is omitted.
In the case of FIG. 8, the terminal box outer frame 31 is configured in two upper and lower stages, and the cable outlets 44 are arranged in different directions. Then, a large circuit or a component 70 such as a capacitor can be accommodated.
In the case of FIG. 9, by using the terminal box outer frame 31 'having a height, a large circuit or a component 70 such as a capacitor can be accommodated.

According to the above embodiment, since the distance from the cable outlet 44 to the terminal block 40 can be increased, wiring work is easy. The state after the connection can be easily confirmed by removing only the lid 32. Since it is possible to select one or two cable outlets 44, the cable can be drawn in any direction. Further, it is easy to fix the seal connector or the like. Furthermore, since the size of the terminal box can be changed, large parts can also be mounted.
Further, since one of the four fixing portions of the substrate 41 is used as the protective ground terminal connecting portion, the protective ground terminal connecting portion can be secured even when the mounting direction of the substrate 41 is rotated by 180 °.

  The present invention is not limited to the above-described embodiment. For example, the position of the terminal block 40 provided on the board 41 is installed at the end of the board 41 as much as possible, so that the cable outlet 44 is provided. The distance from can be taken large.

It is a fragmentary sectional view which shows the terminal box for motors by embodiment of this invention. It is a top view which removes and shows the cover body of FIG. It is a perspective view which decomposes | disassembles and shows the terminal box for motors. It is a longitudinal cross-sectional view which shows the state which reversed the terminal box outer frame and the direction of the board | substrate, ie, rotated 180 degree | times. It is a top view which removes and shows the cover of FIG. (A) (b) (c) is a top view which shows the state which changed the direction of the terminal box outer frame to 1/4 rotation, ie, 90 degree | times. It is a top view which shows the terminal box for motors by other embodiment of this invention. It is a perspective view which shows the terminal box for motors by other embodiment of this invention. It is a perspective view which shows the terminal box for motors by other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor 2 Motor main body 3 Motor terminal box 10 Motor housing 11 Motor case 14 Rotating shaft (output shaft)
16 Stator Winding 16a Internal Lead Wire 17 Hole 30 Base Part 31 Terminal Box Outer Frame 32 Cover 36 Protective Ground Terminal 40 Terminal Block 41 Board 42 Cable Terminal 44 Cable Drawer Port 50 External Cable 51 Rib

Claims (7)

  A motor terminal box having a terminal block attached to an outer peripheral surface of a motor housing and connecting an internal lead wire drawn from the motor body and an external cable drawn from the outside, wherein the terminal box is connected to the motor housing. A pedestal part mounted on the outer peripheral surface, a terminal box outer frame that is detachably assembled to the pedestal part and provided with a cable outlet, and a lid that is assembled to the terminal box outer frame and seals the inside The board having the terminal block is detachably assembled to the pedestal portion, and the mounting portion of the board with respect to the pedestal portion is formed point-symmetrically so that the front and back directions of the board can be reversed. A motor terminal box.   2. The motor according to claim 1, wherein an internal lead wire drawn out from the motor body is electrically connected to a terminal of the terminal block on a surface opposite to a surface on which the terminal block of the substrate is arranged. Terminal box.   The motor terminal box according to claim 1, wherein the terminal block is provided along one side of the substrate so as to be point-symmetric when the front and rear of the substrate are reversed.   2. The terminal box according to claim 1, wherein the terminal box is formed in a square shape, a cable outlet is provided in an outer frame of the terminal box, and the outer frame of the terminal box is configured to be rotatable by a quarter of a turn. The motor terminal box described.   The motor according to claim 1, wherein ribs are provided on the inner surface of the outer frame of the terminal box corresponding to both sides of the cable outlet so that the cable outlet can be fixed to the outer frame of the terminal box. Terminal box.   Two ribs are provided on the inner surface of the outer frame of the terminal box corresponding to both sides of the cable outlet so that one cable outlet can be fixed to one surface of the outer frame of the terminal box. The motor terminal box according to claim 1, wherein three ribs are provided corresponding to the cable outlets so that the two cable outlets can be fixed to the inner surface.   6. The board according to claim 1, wherein the board is screwed to the pedestal portion via a board fixing screw, and one of the board fixing screws has a function of a protective grounding terminal. The terminal box for motors according to 1.

Images