JP2009112185A - motor - Google Patents

Abstract

To securely hold a brush lead wire in a motor.
A bracket 12 is coupled to a lower end of a dome-shaped cylindrical housing 11, and a brush holder 31 that holds a brush 32 and a brush lead wire 34 that is connected to the brush 32 are disposed at a position surrounding a commutator 28 of the bracket 12. In the motor 10 provided with a fixing groove 38 for holding the housing, the housing 11 is provided with a pressing protrusion 15 for pressing the brush lead wire 34 held in the fixing groove 38 to prevent it from coming off.
[Selection] Figure 2

Description

  The present invention relates to a motor.

As described in Patent Document 1, as a conventional motor, a bracket is coupled to the lower end of a dome-shaped cylindrical housing, a magnet is fixed to the inner periphery of the housing, and both ends of a rotor disposed on the central axis of the housing are arranged. Each is supported by the top surface of the housing and the bracket, and a commutator is provided near the bracket of the rotor. A brush holder that holds the brush and a fixing groove that holds the brush lead wire connected to the brush at a position surrounding the bracket commutator. There is something that is provided. By inserting and holding the brush lead wire in the fixed groove, the brush lead wire is prevented from swinging due to vibration or the like, and adverse effects on motor control such as current ripple are eliminated.
JP2004-297896

  In the motor described in Patent Document 1, the brush lead wire is simply inserted into the groove from the opening of the fixed groove and held, and the fixed groove opens outward even after the brush lead wire is inserted. . For this reason, there exists a possibility that a brush lead wire may come off from opening of a fixed groove.

  An object of the present invention is to reliably hold a brush lead wire in a motor.

  According to the first aspect of the present invention, a bracket is coupled to the lower end of the cylindrical housing, a magnet is fixed to the inner periphery of the housing, and both end portions of the rotor disposed on the central axis of the housing are connected to the top surface portion of the housing And a bracket, a commutator is provided near the bracket of the rotor, and a motor is provided with a brush holder for holding the brush and a fixing groove for holding a brush lead wire connected to the brush at a position surrounding the bracket commutator. The housing includes a pressing portion that presses and holds the brush lead wire held in the fixing groove.

  According to a second aspect of the present invention, in the first aspect of the present invention, the brush lead wire is connected to the power supply line via a connector provided on the bracket, and a fixing groove for holding the power supply line is provided at a position surrounding the bracket commutator. The housing is provided with a pressing portion that presses the power supply line held in the fixed groove to prevent the housing from coming off.

  According to a third aspect of the present invention, a bracket is coupled to the lower end of the cylindrical housing, a magnet is fixed to the inner periphery of the housing, and both end portions of the rotor disposed on the central axis of the housing are respectively connected to the top surface portion of the housing. And a bracket, a commutator is provided near the bracket of the rotor, and a brush holder for holding the brush and a fixing groove for holding a brush lead wire connected to the brush are provided at a position surrounding the bracket commutator. The brush lead wire is connected to the power supply line through the connector provided on the bracket, and the breaker interposed between the terminal to which the brush lead wire of the connector is connected and the terminal to which the power supply line is connected is inserted into the bracket. The housing is provided with a pressing portion that holds the breaker and prevents it from coming off.

(Claim 1)
(a) After the brush lead wire is inserted and held in a fixing groove provided in the bracket, it is pressed from above by a pressing portion provided in the housing and is prevented from coming off. The holding portion of the housing generally closes the opening of the fixing groove of the bracket from above, and reliably avoids the possibility that the brush lead wire comes out of the opening of the fixing groove.

  (b) By connecting the bracket to the lower end of the housing, the brush lead wire retaining structure of (a) described above can be constructed immediately.

(Claim 2)
(c) The power supply line connected to the brush lead wire via the connector is also inserted and held in the fixing groove provided in the bracket, and then pressed from above by the pressing portion provided in the housing to be prevented from coming off. The holding part of the housing substantially closes the opening of the fixing groove of the bracket from above, and reliably avoids the possibility that the feeder line comes out of the opening of the fixing groove.

  (d) By connecting the bracket to the lower end of the housing, it is possible to immediately construct the structure for preventing the feeder line from falling off as described in (c) above.

(Claim 3)
(e) After the breaker is inserted into the bracket, the breaker is pressed from above with a pressing portion provided in the housing and is prevented from coming off. While making it easy to insert the breaker into the bracket, the breaker can be securely retained.

  (f) By connecting the bracket to the lower end of the housing, the breaker retaining structure of (e) described above can be constructed immediately.

  1 is a plan view showing the motor, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 is a view taken along the line VV of the housing of FIG. 2, FIG. 6 is a view taken along the line VI-VI of the bracket of FIG. 2, and FIG. 7 shows a wiring state of the power supply line to the bracket. Fig. 9 is a plan view, Fig. 8B is a side view, Fig. 8 is a perspective view showing a feed line drawing structure, and Fig. 9 is a side view showing a feed line drawing structure.

  1 to 9 show a DC motor 10 that drives a hydraulic pump of an outboard motor power trim tilt device. As shown in FIGS. 1 to 4, the motor 10 is configured by connecting a disc-shaped synthetic resin bracket 12 to the lower end of a cylindrical synthetic resin housing 11. Flange 11A is provided at a plurality of locations (three locations in this embodiment) on the outer periphery of the lower end of housing 11, and flange 12A is provided on the outer periphery of bracket 12 so as to face flange 11A of housing 11. In the motor 10, the flange 11 </ b> A, 12 </ b> A of each of the housing 11 and the bracket 12 is a set screw 14 in a state where the lower end opening of the housing 11 is fitted to the upper end outer periphery of the bracket 12 via the O-ring 13. The housing 11 and the bracket 12 are integrated by being combined. In the motor 10 in an integrated state of the housing 11 and the bracket 12, the bracket 12 is arranged on a support body (not shown), and bolts inserted into bolt insertion holes provided in the flanges 11A and 12A are screwed to the support body. To wear.

  The motor 10 is fixedly provided with an arcuate yoke 21 made of magnetic metal on the inner periphery of the cylindrical portion of the housing 11, and each arcuate shape along a plurality of positions (four positions in this embodiment) on the inner periphery of the yoke 21. The magnets 22 are fixedly arranged on the inner periphery of the yoke 21 with a space therebetween.

  The motor 10 arranges the rotor 23 on the central axis. One end of the rotating shaft 24 of the rotor 23 is supported by a bearing 25 provided on the top surface blocking portion of the housing 11, and the other end of the rotating shaft 24 is supported by a bearing 26 provided on the bracket 12, and a seal member 27. Is sealed. A commutator 28 is provided near the bracket 12 of the rotor 23.

  The motor 10 is provided with brush holders 31 at a plurality of circumferential positions (four positions in the present embodiment) surrounding the commutator 28 in the bracket 12, and holds the brushes 32 in the brush holders 31. Each brush 32 is urged in the radial direction passing through the center of the commutator 28 by the urging force of the spring 33 that is contracted between the brackets 12, is slidably guided by the brush holder 31, and is in sliding contact with the commutator 28.

  The motor 10 has a brush lead wire 34 connected to each brush 32. In the present embodiment, two brushes extending from the two brushes 32 located on the first diameter line of the first and second diameter lines that pass through the center of the commutator 28 and are orthogonal to each other. The lead wire 34 is connected to one terminal 35 </ b> A of the connector 35 and is connected to a power supply line 40 (41) connected to the other terminal 35 </ b> B of the connector 35. The other two brush lead wires 34 extending from the other two brushes 32 located on the second diameter line are connected to one terminal 36A of the connector 36 with the breaker, and the other terminal 36B of the connector 36 is connected. It is connected to the feeder 40 (42) connected to (the breaker 37 is interposed between the terminal 36A and the terminal 36B).

  The bracket 12 includes an intermediate portion of the long brush lead wire 34 of the two brush lead wires 34 connected to the connector 35, and the two brush lead wires 34 connected to the connector 36. A fixing groove 38 for inserting and holding the intermediate portion of the long brush lead wire 34 is provided. Further, the bracket 12 includes a fixing groove 39 for inserting and holding an intermediate portion of the power supply line 40 (41, 42). The housing 11 also holds down the pressing protrusion 15 that holds the brush lead wire 34 and the power supply line 40 held in the fixing grooves 38 and 39 from above and prevents the breaker 37 inserted in the bracket 12 from above. A pressing projection 16 is provided to prevent it from coming off.

  Hereinafter, the lead-out structure of the feeder line 40 (41, 42) in the motor 10 will be described. The power supply line 40 needs to be drawn out from the motor 10 without causing intrusion of water such as seawater into the inside of the motor 10, and the drawn power supply line 40 interferes with the wall of the hull and the movable part of the outboard motor. It is necessary to reduce the amount of protrusion to the periphery of the motor 10 so as not to cause the problem.

  In the motor 10, the grommet 50 is lightly press-fitted into an insertion hole 51 that is recessed in a direction orthogonal to the central axis of the housing 11 on the outer surface of the bracket 12. In this embodiment, as shown in FIGS. 3 and 7, a long hole-like insertion hole 51 that is concave with respect to the outer surface of the bracket 12 is provided, and the feeder wire 40 is connected to the motor 10 on the bottom surface of the insertion hole 51. An insertion hole 52 is formed through the inside and outside. In this embodiment, two insertion holes 52 and 52 corresponding to the two power supply lines 41 and 42 are formed. In the present embodiment, the grommet 50 is inserted into the insertion hole 51 without using a sealing agent (or through a sealing agent).

  As shown in FIGS. 3 and 7, the power supply line 40 (41, 42) is a sealing hole 50 </ b> A provided in a direction orthogonal to the central axis of the housing 11 of the grommet 50, and in this embodiment, two power supply lines 41. , 42 is passed through the two sealing holes 50A, 50A and drawn out from the inside of the motor 10. The feed lines 40 (41, 42) drawn out from the motor 10 are in the direction along the central axis of the housing 11 (the direction toward the top surface side of the housing 11) at the outer bent portion 40A that protrudes from the sealing hole 50A of the grommet 50. ) And is extended upward along the outer surface of the housing 11 toward the top surface.

  At this time, as shown in FIGS. 3, 4, 8, and 9, the motor 10 feeds the power supply lines 40 (41, 42) drawn from the grommets 50 inserted into the insertion holes 51 of the bracket 12. A guide portion 61 that is detachably held in the pull-out direction is provided integrally with the lower end side of the housing 11 immediately before the bent portion 40A that bends in the direction along the central axis of the housing 11.

  Specifically, it is a part of the outer surface of the cylindrical portion of the housing 11 in the circumferential direction, and is on the side of the grommet 50 that is inserted in the insertion hole 51 of the bracket 12 from the middle to the lower end along the axial direction. A guide portion 61 having a downwardly extending portion 60A which has a downwardly extending portion 60A which has a rectangular plate shape projecting to the bottom and opens downward in a groove shape in the projecting portion 60, and in this embodiment, two power supply lines 41 , 42 corresponding to the two guide portions 61, 61 are provided. When the housing 11 is fitted to the bracket 12, each guide portion 61 corresponds to each sealing hole 50A of the grommet 50, and the upper end of the groove of each guide portion 61 is formed in an arc shape that matches the upper arc of each sealing hole 50A. To do. As a result, the power supply lines 40 (41, 42) drawn out from the grommet 50 are held in a straight shape in the drawing direction by the thickness of the overhanging portion 60, and are subjected to the bending restoring behavior force generated in the bending portion 40A. Does not deform.

  The overhanging portion 60 covers the outer end face of the grommet 50 so as to block the grommet 50 from the insertion hole 51. In this embodiment, the outer surface around the insertion hole 51 of the bracket 12 in which the insertion hole 51 of the grommet 50 is recessed is processed into a flat shape (FIG. 7). And the range which faces the outer surface around the insertion hole 51 of the bracket 12 which protrudes below from a part of circumferential direction of the annular lower end part of the housing 11 fitted to the upper end outer peripheral part of the bracket 12 The inner surface of the overhanging portion 60 facing the outer surface around the insertion hole 51 of the bracket 12 is processed into a flat shape in contact with the outer surface around the insertion hole 51 (FIGS. 3 and 8). As a result, the overhanging portion 60 covers the outer end face of the grommet 50 inserted into the insertion hole 51 of the bracket 12 so as to close the entire surface, and prevents the grommet 50 from coming off the insertion hole 51.

  According to the present embodiment, the provision of the overhanging portion 60 and the guide portion 61 on the housing 11 provides the following operational effects.

  (a) The feed line 40 (41, 42) passes through the grommet 50 inserted in the bracket 12 in a direction perpendicular to the axis of the housing 11 and is drawn outward, and then bent in a direction along the axis of the housing 11 In doing so, the guide portion 61 integrally formed on the lower end side of the housing 11 holds the power supply line 40 (41, 42) drawn out from the grommet 50 in the drawing direction immediately before the bent portion 40A. As a result, the bent power supply line 40 (41, 42) is held by the guide part 61 and does not deform the grommet 50, and the sealing function by the grommet 50 of the lead-out part from the bracket 12 of the power supply line 40 (41, 42) is achieved. It can be secured.

  (b) The lower end portion of the housing 11 has a downward projecting portion 60 projecting to the grommet 50 side, and the projecting portion 60 is provided with a guide portion 61 that forms a groove shape and opens downward. Therefore, when the bracket 12 is attached to and detached from the lower end of the housing 11, the groove-shaped guide portion 61 provided in the downward projecting portion 60 of the housing 11 can be attached to and detached from the power supply line 40 (41, 42) drawn from the grommet 50 from above. .

  (c) The overhanging portion 60 of the above (b) covers the outer end face of the grommet 50 and prevents the grommet 50 from coming off from the insertion hole 51. Therefore, when the bracket 12 is attached to and detached from the lower end of the housing 11, the overhanging portion 60 of the housing 11 covers the outer end surface of the grommet 50, and the grommet 50 can be prevented from coming off immediately and fixed easily.

  Further, as shown in FIGS. 1, 3, 8, and 9, the motor 10 is pulled out from the grommet 50 inserted into the insertion hole 51 of the bracket 12 and bent in a direction along the central axis of the housing 11. A clamp portion 71 that holds the power supply wires 40 (41, 42) extending upward along the outer surface of the housing 11 in a detachable manner in the upward extending direction after being bent at the portion 40A is provided on the outer surface of the housing 11. Provided by integral molding.

  Specifically, it has a hook portion 70 that protrudes from an intermediate portion along the axial direction of the outer surface of the cylindrical portion of the housing 11 (in this embodiment, the upper end portion of the overhang portion 60 described above), and the hook portion 70 has a groove shape. A clamp portion 71 having a lateral opening 71A that opens in the circumferential direction of the outer surface of the housing 11 is provided. The feed lines 40 (41, 42) are inserted into the clamp part 71 from the lateral opening 71A of the hook part 70, and in this embodiment, the two feed lines 41, 42 are the hook part 70 and the outer surface of the housing 11 (this embodiment). In the example, it is held side by side with the surface of the upper end portion of the overhang portion 60.

  According to the present embodiment, the hook portion 70 and the clamp portion 71 are provided in the housing 11, thereby providing the following operational effects.

  (a) The feeder lines 40 (41, 42) extending upward along the outer surface of the housing 11 are detachably held by a clamp portion 71 integrally formed on the outer surface of the housing 11. Since the clamp part 71 is formed integrally with the housing 11, the number of parts is not increased, and the assembly of the motor 10 when the power supply lines 40 (41, 42) are repeatedly attached to and detached from the motor 10 is good. No parts are required.

  (b) A hook portion 70 is provided on the outer surface of the housing 11, and a clamp portion 71 is formed in the hook portion 70 so as to form a groove shape and open in the circumferential direction of the housing 11. Accordingly, the power supply lines 40 (41, 42) extending to the outer surface of the housing 11 can be easily engaged with and detached from the groove-shaped clamp portion 71 of the hook portion 70 from the circumferential direction of the housing 11.

  According to the present embodiment, by providing the housing 11 with the pressing lead 15 for the brush lead wire 34, the power supply line 40, and the pressing protrusion 16 for the breaker 37, the following operational effects are obtained.

  (a) After the brush lead wire 34 is inserted and held in a fixing groove 38 provided in the bracket 12, the brush lead wire 34 is pressed from above with a pressing projection 15 provided in the housing 11 and is prevented from coming off. The pressing protrusion 15 of the housing 11 substantially closes the opening of the fixing groove 38 of the bracket 12 from above, and reliably avoids the possibility that the brush lead wire 34 comes out of the opening of the fixing groove 38.

  (b) By connecting the bracket 12 to the lower end of the housing 11, it is possible to immediately construct the structure for preventing the brush lead wire 34 from falling off as described above (a).

  (c) The power supply line 40 connected to the brush lead wire 34 via the connectors 35 and 36 is also inserted into and held in the fixing groove 39 provided in the bracket 12, and then the holding protrusion 15 provided in the housing 11. Pressed from above and prevented from coming off. The pressing protrusion 15 of the housing 11 substantially closes the opening of the fixing groove 39 of the bracket 12 from above, and reliably avoids the possibility that the power supply line 40 comes out of the opening of the fixing groove 39.

  (d) By connecting the bracket 12 to the lower end of the housing 11, it is possible to immediately construct the structure for preventing the feeder line 40 from being removed as described in (c) above.

  (e) After the breaker 37 is inserted into the bracket 12, the breaker 37 is pressed from above by the pressing protrusion 16 provided on the housing 11 and is prevented from coming off. While making it easy to insert the breaker 37 into the bracket 12, the breaker can be securely held out.

  (f) By connecting the bracket 12 to the lower end of the housing 11, the breaker retaining structure of (e) described above can be constructed immediately.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 is a plan view showing a motor. FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a bottom view of the motor. FIG. 5 is a view taken along the line VV of the housing of FIG. FIG. 6 is an arrow view taken along the line VI-VI of the bracket of FIG. 7A and 7B show a wiring state of the power supply line to the bracket, where FIG. 7A is a plan view and FIG. 7B is a side view. FIG. 8 is a perspective view showing a lead-out structure of the feeder line. FIG. 9 is a side view showing a lead-out structure of the feeder line.

Explanation of symbols

10 Motor 11 Housing 12 Bracket 15 Pressing projection (pressing part)
16 Pressing protrusion (pressing part)
22 Magnet 23 Rotor 28 Commutator 31 Brush holder 32 Brush 34 Brush lead wire 35, 36 Connector 37 Breaker 38, 39 Fixed groove 40 Feed line

Claims (3)

A bracket is joined to the lower end of the cylindrical housing,
Fix the magnet to the inner periphery of the housing,
Each end of the rotor arranged on the central axis of the housing is supported by the top surface of the housing and the bracket, and a commutator is provided near the bracket of the rotor.
In a motor provided with a brush holder for holding a brush and a fixing groove for holding a brush lead wire connected to the brush at a position surrounding the bracket commutator,
A motor characterized in that the housing includes a pressing portion that presses and holds the brush lead wire held in the fixing groove. The brush lead wire is connected to a power supply line through a connector provided on the bracket,
At the position surrounding the bracket commutator, provide a fixing groove to hold the power supply line,
The motor according to claim 1, wherein the housing includes a pressing portion that presses the power supply line held in the fixing groove and prevents the power supply line from coming off. A bracket is joined to the lower end of the cylindrical housing,
Fix the magnet to the inner periphery of the housing,
Each end of the rotor arranged on the central axis of the housing is supported by the top surface of the housing and the bracket, and a commutator is provided near the bracket of the rotor.
In a motor provided with a brush holder for holding a brush and a fixing groove for holding a brush lead wire connected to the brush at a position surrounding the bracket commutator,
The brush lead wire is connected to the power supply line through a connector provided on the bracket,
Insert a breaker interposed between the terminal to which the brush lead wire of the connector is connected and the terminal to which the power supply line is connected into the bracket,
A motor characterized in that the housing includes a pressing portion that holds the breaker and prevents it from coming off.

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