JP2006037802A - Starter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a starter not requiring to manufacture and design a conductive plate individually even if position relation of a starter and a surrounding member is changed to reduce cost. <P>SOLUTION: The starter 1 which consists of a hollow cylindrical casing 10, an electric motor 10 stored in the casing 10 and having a motor shaft 21 projected from a front end part of the casing 10, and a terminal 30 provided on an outer circumference part of the casing 10, includes the conductive plate 50 made of conductive material, having a terminal connection part 56 of one end side is connected to the terminal 30, and having a flat plate part 51 of another end side provided to oppose a rear end part of the casing 10. A conversion terminal 60 is attached on a flat plate part 51 of the conductive plate 50. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a terminal structure of a starter used as an engine starter.

  The starter is an engine starter that applies a rotational force to a flywheel connected to the crankshaft of the engine, and includes an electric motor that operates by receiving power supply from a battery. The motor shaft is provided with a pinion that meshes with the outer peripheral teeth of the flyhole. When the battery power is supplied and the motor shaft rotates, the rotational force is transmitted to the flywheel via the pinion, and the crankshaft rotates. It is designed to start.

Such a starter is attached to a position adjacent to the engine, for example, an engine case, and has a hollow cylindrical casing, an electric motor housed in the casing, and terminals provided on the outer periphery of the casing. Here, the power cable from the battery is connected to the terminal, but the starter is usually provided in a narrow space due to layout restrictions, etc., so when the terminal is close to other members etc. Makes it difficult to connect the power cable to the terminal. In such a case, as a method for facilitating the connection of the power cable to the terminal, a method of converting (moving) the position of the terminal using a conductive plate is known. The conduction plate is a plate-like member (such as a metal plate) made of a conductive material, and one end portion is attached to the terminal of the starter and the other end portion has a conversion terminal attachment portion. The conversion terminal is a terminal to which the power cable is actually attached, and is provided, for example, at a position on the opposite side of the casing from which the motor shaft protrudes. According to the method of converting the position of the terminal by such a conductive plate, even if the original terminal is close to another member or the like and it becomes difficult to connect the power cable, the conversion terminal is connected to the power cable. If it is located at a position where it can be easily attached, connection workability of the power cable is maintained.
JP 2002-238210 A

  However, since the position of the conversion terminal where the power cable can be easily attached is determined by the positional relationship between the starter attached to the engine case or the like and the surrounding members, the power cable can be easily attached under a certain positional relationship. Even if the conductive plate is designed and manufactured so that the conversion terminal can be guided to any position, the conversion terminal may not be guided to a position where it can be easily attached under other positional relationships. That is, the conventional conductive plate is not versatile, and it is necessary to individually design and manufacture the conductive plate according to the positional relationship between the starter and the other members, and there is a problem that the cost increases accordingly.

  The present invention has been made in view of such problems, and even if the positional relationship between the starter and surrounding members changes, it is not necessary to individually manufacture and design the conductive plate, and the cost can be reduced. The purpose is to provide a simple starter.

  A starter according to the present invention includes a hollow cylindrical casing, an electric motor housed in the casing and having a motor shaft projecting from one end in the axial direction of the casing, and a terminal provided on the outer peripheral portion of the casing A conductive plate made of a conductive material, provided such that a terminal connecting portion on one end side is connected to the terminal and a flat plate portion on the other end side is opposed to the other end side end portion in the axial direction of the casing; And a conversion terminal attached to the flat plate portion of the conductive plate.

  Further, in the starter, it is preferable that the flat plate portion of the conductive plate has a plurality of conversion terminal mounting holes, and the conversion terminals can be selectively mounted in any one of the plurality of conversion terminal mounting holes. Here, the plurality of conversion terminal mounting holes are preferably arranged at equal intervals on a virtual circle on the flat plate portion, and moreover, the plurality of conversion terminal mounting holes are provided at a 45-degree pitch on the virtual circle. It is preferable.

  Moreover, it is preferable that the flat plate part in a conduction | electrical_connection board is covered with the resin part in the said starter. Moreover, it is preferable that the protrusion part formed in the other end side of the axial direction of a casing and the recessed part provided in the resin part which covers a conductive plate fit.

  In the starter according to the present invention, the terminal connecting portion on one end side is connected to the terminal on the outer peripheral portion of the casing, and the flat plate portion on the other end side is the end portion of the casing (the axial direction opposite to the side on which the motor shaft extends) The conductive plate is provided so as to face the end portion, and the conversion terminal is attached to the flat plate portion of the conductive plate. For this reason, the position of the terminal to which the power cable is attached can be moved from the outer periphery of the casing (terminal position) to the end of the casing (conversion terminal position), and the starter is attached to the engine case or the like In this case, even when the position of the original terminal (terminal on the casing) is close to another member or the like, the power cable may be attached to the position of the converted terminal (conversion terminal). The attachment work to is very easy. In addition, since the conversion terminal can be selectively provided at any position on the flat plate portion, it is not necessary to individually design and manufacture the conductive plate according to the positional relationship between the starter and the engine case, etc. It can be made cheap.

  Further, in the starter according to the present invention, the flat plate portion of the conductive plate has a plurality of conversion terminal mounting holes, and the conversion terminal can be selectively attached to any one of the plurality of conversion terminal mounting holes. For example, when selecting the mounting position of the conversion terminal on the flat plate, after the layout of the positional relationship between the starter and the engine case has been determined, attach the power cable from the plurality of conversion terminal mounting holes provided in advance. It is only necessary to select one having the optimum conditions. For this reason, rather than providing a process of determining the mounting position of the conversion terminal on the flat plate portion after the layout of the positional relationship between the starter and the engine case has been determined, and providing a hole at that position It can be done smoothly. Here, if the plurality of conversion terminal mounting holes are arranged at equal intervals on a virtual circle on the flat plate portion, the conversion terminal mounting hole is easily formed. Further, if the plurality of conversion terminal mounting holes are provided at a 45-degree pitch on the virtual circle, the conversion terminal mounting holes can be formed more easily.

  Moreover, in the starter according to the present invention, if the flat plate portion of the conductive plate is covered with the resin portion, the electrical insulation between the conductive plate and the casing is reliably maintained. Further, if the protrusion formed on the other end side of the casing in the axial direction and the recess provided in the resin portion covering the conductive plate are fitted, when attaching the resin portion to the casing, If these protrusions and recesses are matched, the attaching operation becomes easy. Moreover, after attaching the resin part to the casing, the positional deviation between the two is prevented.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1-5 has shown the starter 1 provided with one Embodiment of this invention. The starter 1 includes a hollow cylindrical casing 10, an electric motor 20 accommodated in the casing 10, a terminal 30 connected to the electric motor 20, and the like. The casing 10 includes an intermediate yoke 11, front brackets 12 and rear brackets 13 attached to both ends thereof, and are connected by a plurality of bolts 14. The electric motor 20 includes a rotor 23 including a motor shaft 21 and a coil 22 attached to the outer periphery thereof, and a field magnet 24 provided on the inner wall of the yoke 11. The motor shaft 21 is rotatably supported by needle bearings 15 and 16 provided on the front bracket 12 and the rear bracket 13, respectively. The terminal 30 is formed of a metal screw provided so as to protrude from the outer peripheral portion of the rear bracket 13 radially outward with the axis AX of the motor shaft 21 as a center, and a nut 31 is attached thereto. .

  A brush 17 connected to the terminal 30 and the ground wire C2 is provided in the rear bracket 13 and is always pressed against (contacted with) a commutator 25 attached to the outer peripheral portion of the motor shaft 21 by a contracted spring 18. ing. The field magnet 24 is formed in a cylindrical shape as a whole, and the inner peripheral surface thereof is located close to the outer peripheral surface of the coil 22. The motor shaft 21 extends from the front end portion in the axial direction of the casing 10 (from the front bracket 12) to the front (to the left in FIG. 1). A spline is cut in a portion of the motor shaft 21 that protrudes from the front bracket 12, and a pinion that meshes with an outer peripheral tooth of an engine flywheel (not shown) is provided here.

  A terminal conversion member 40 is provided at the rear end in the axial direction of the casing 10 (the rear end of the rear bracket 13; the right end of the drawing in FIG. 1). The terminal conversion member 40 includes a conductive plate 50 made of a conductive material such as metal, a conversion terminal 60 attached to the conductive plate 50, and a resin that covers the outside of the conductive plate 50 with the conversion terminal 60 attached. Part 70. The conductive plate 50 includes a disk-shaped flat plate portion 51, and a terminal connection portion 56 that extends upward from the flat plate portion 51 and extends forward of the casing 10 (leftward in FIG. 1) (FIG. 4 also). reference).

  As shown in FIG. 4, a plurality of conversion terminal mounting holes 52 are arranged in the flat plate portion 51 on the virtual circle S on the flat plate portion 51 at equal intervals and at a 45-degree pitch. As the center of the virtual circle S, for example, the axis AX of the motor shaft 21 is employed.

  The conversion terminal 60 is made of a metal screw. The conversion terminal 60 is inserted into one of the plurality of conversion terminal mounting holes 52 provided in the flat plate portion 51 of the conductive plate 50 from the side where the terminal connection portion 56 extends (the side corresponding to the front of the casing 10). Is done. Further, the resin portion 70 is formed by molding the conductive plate 50 in a state where the conversion terminal 60 is inserted into the conversion terminal mounting hole 52 as described above. Although almost the entire conductive plate 50 is covered with resin by this molding, only the vicinity of the portion connected to the terminal 30 in the terminal connection portion 56 of the conductive plate 50 is formed in a hollow shape extending vertically ( 1 to 3).

  A washer 61 and a nut 62 are attached to the conversion terminal 60 so that a flat metal fitting M provided at the end of the power cable C1 connected to the positive terminal of the battery BT can be electrically connected to the conversion terminal 60. (See FIG. 1). Further, the rear bracket 13 has a protruding portion 13a protruding rearward, and a concave portion 71 into which the protruding portion 13a is fitted is formed in the central portion of the surface of the resin portion 70 facing the rear bracket 13. Is provided. The terminal conversion member 40 (resin portion 70) is attached to the casing 10 after the protruding portion 13a formed in the casing 10 and the concave portion 71 formed in the resin portion 70 are combined (fitted). The terminal connection part 56 of the conductive plate 50 is positioned above the terminal 30, and the terminal 31 passes through the hole 56 a (see FIG. 4) formed in the terminal connection part 56, and then the nut 31 is tightened. To do.

  A plurality of bracket support portions 19 are provided on the outer peripheral surface of the rear bracket 13 so as to project laterally, and a screw mounting hole 19a provided therein is provided, for example, as shown in FIG. The starter 1 can be fixed at a predetermined position on the engine case EC by screwing the fixing bolt B in a state of being aligned with a screw mounting hole (not shown) of the engine case EC (hereinafter referred to as engine case EC). It has become.

  In the starter 1 having such a configuration, when the starter switch SW (see FIG. 1) provided in the middle of the power cable C1 connecting the positive terminal of the battery BT and the terminal 30 of the starter 1 is turned on, the power of the battery BT is increased. The electric motor 20 is supplied to the starter 1 and rotates. As a result, the rotational force of the starter 1 is transmitted from the pinion provided on the motor shaft 21 to the flywheel, the crankshaft is rotated, and the engine E is started.

  After the starter 1 is attached to the engine case EC as described above, for example, the power cable C1 is attached to the conversion terminal 60. In the starter 1, the terminal conversion member 40 moves the terminal position from the original position (position where the terminal 30 is located) to the position behind the starter 1 (position where the conversion terminal 60 is located). It is attached to the terminal (conversion terminal 60) after movement.

  As described above, the starter 1 according to the present invention includes a hollow cylindrical casing 10, an electric motor 10 that is accommodated in the casing 10, the motor shaft 21 protrudes from the front end portion of the casing 10, and an outer periphery of the casing 10. In the starter configured to include the terminal 30 provided in the part, made of a conductive material, the terminal connection part 56 on one end side is connected to the terminal 30 on the outer peripheral part of the casing 10, and the other end side The flat plate portion 51 has a conductive plate 50 provided so as to face an end portion of the casing 10 (an axial end portion opposite to the side on which the motor shaft 21 extends). The conversion terminal 60 is attached. For this reason, the position of the terminal to which the power cable C1 is attached can be moved from the outer peripheral portion of the casing 10 (the position of the terminal 30) to the end portion side of the casing 10 (the position of the conversion terminal 60). Even when the position of the original terminal (terminal 30 on the casing 10) is close to another member 90 (see FIG. 5) or the like in a state where it is attached to the EC or the like, the converted terminal (conversion terminal 60). Since the power cable C1 may be attached at the position), the work of attaching the power cable C1 to the starter 1 becomes very easy. Moreover, since the conversion terminal 60 can be selectively provided at any position on the flat plate portion 51, the conductive plate 50 (terminal conversion member 40) is individually provided according to the positional relationship between the starter 1 and the engine case EC or the like. A) There is no need to design and manufacture, and the cost can be reduced.

  In the starter 1 according to the present embodiment, the flat plate portion 51 of the conductive plate 50 has a plurality of conversion terminal mounting holes 52, and the conversion terminal 60 is selective to any one of the plurality of conversion terminal mounting holes 52. Since the layout of the positional relationship between the starter 1 and the engine case EC is determined, the selection of the mounting position of the conversion terminal 60 on the flat plate portion 51 is determined. It is only necessary to select one having the optimum conditions for attaching the power cable C1 from the conversion terminal attaching hole 52. For this reason, rather than providing a step of determining the mounting position of the conversion terminal 60 on the flat plate portion 51 after the layout of the positional relationship between the starter 1 and the engine case EC and the like is determined, and drilling a hole at that position. Design and manufacturing can be performed smoothly. Further, since the plurality of conversion terminal mounting holes 52 are arranged at equal intervals on the virtual circle S on the flat plate portion 51, the conductive plate 50 is placed on the turntable, and the conversion terminal is attached while turning the turntable. The holes 52 need only be drilled one after another, and the conversion terminal mounting hole 52 can be formed very easily. Further, since the plurality of conversion terminal mounting holes 52 are provided on the virtual circle S at a pitch of 45 degrees, the conversion terminal mounting holes 52 are further easily formed.

  Further, since the flat plate portion 51 of the conductive plate 50 is covered with the resin portion 70, the electrical insulation between the conductive plate 50 and the casing 10 is reliably maintained. Moreover, since the protrusion part 13a formed in the casing 10 and the recessed part 71 provided in the resin part 70 fit, when attaching the terminal conversion member 40 (resin part 70) to the casing 10, If the protrusions 13a and the recesses 71 are matched, the attaching operation becomes easy. Moreover, after the terminal conversion member 40 (resin part 70) is attached to the casing 10, it is possible to prevent the positional deviation between them. Moreover, when attaching the power supply cable C1 to the conversion terminal 60, it can prevent that the terminal conversion member 40 (resin part 70) rotates with respect to the casing 10 when the nut 62 is twisted.

  The preferred embodiments of the present invention have been described so far, but the scope of the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, the plurality of conversion terminal mounting holes 52 are provided at a 45-degree pitch on the flat virtual circle S, but this is an example, and is not necessarily provided at a 45-degree pitch. May be. Further, it is not necessarily provided on the virtual circle S at equal intervals, and is not necessarily provided on the virtual circle S. In the above-described embodiment, the flat plate portion 51 of the conductive plate 50 is configured to be provided with a plurality of conversion terminal mounting holes 52 in advance. However, the flat plate portion 51 is not provided with the conversion terminal holes 52 in advance. After the layout of the positional relationship between 1 and the engine case EC or the like is determined, only one conversion terminal mounting hole may be drilled at the optimum portion for mounting the conversion terminal, and the conversion terminal 60 may be provided there. Good. In addition, the conductive plate 50 does not necessarily have to be covered with resin as long as electrical insulation from the outside is maintained by other means.

It is a partial cross section side view of the starter concerning one embodiment of the present invention. It is a partial cross section front view of the said starter seen from the arrow II in FIG. It is the perspective view seen from the back diagonally upper direction of the said starter. FIG. 4 is a perspective view of the starter shown in FIG. 3 excluding a resin portion. It is the figure which looked at the starter attached to the engine case from back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Starter 10 Casing 13a Protrusion part 20 Electric motor 21 Motor shaft 40 Terminal conversion member 50 Conductive plate 51 Flat plate part 52 Conversion terminal attachment hole 56 Terminal connection part 60 Conversion terminal 70 Resin part 71 Recessed part BT Battery
C1 Power cable

Claims (6)

A hollow cylindrical casing;
An electric motor housed in the casing and having a motor shaft projecting from one end in the axial direction of the casing;
Terminals provided on the outer periphery of the casing;
A conductive plate made of a conductive material, provided with a terminal connection portion on one end side connected to the terminal and a flat plate portion on the other end side facing the other end side end portion in the axial direction of the casing;
A starter comprising: a conversion terminal attached to the flat plate portion of the conductive plate. 2. The flat plate portion of the conductive plate has a plurality of conversion terminal mounting holes, and the conversion terminal can be selectively mounted in any one of the plurality of conversion terminal mounting holes. The starter described. The starter according to claim 2, wherein the plurality of conversion terminal mounting holes are arranged at equal intervals on a virtual circle on the flat plate portion. 4. The starter according to claim 3, wherein the plurality of conversion terminal mounting holes are provided at a 45-degree pitch on the virtual circle. The starter according to claim 1, wherein the flat plate portion of the conductive plate is covered with a resin portion. 6. The starter according to claim 5, wherein a protruding portion formed on the other end side of the casing in the axial direction and a recess provided in the resin portion covering the conductive plate are fitted. .

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