JP4841948B2 - Motor generator and assembling method thereof - Google Patents

Description

  The present invention is used for a hybrid vehicle using both internal combustion engine power and electric power. The present invention is used for a hybrid vehicle in which a motor generator is accommodated in a space inside a flywheel housing of an internal combustion engine. In particular, it relates to the assembly process of the motor generator and the rationalization of the work procedure.

  The applicant of the present application manufactures a hybrid power unit having a basic structure in which a motor generator is fixedly mounted on an output shaft of an internal combustion engine, and sells a hybrid vehicle equipped with the power unit. The apparatus of this embodiment (see FIG. 3) includes a motor generator 2 and a clutch (3) between the internal combustion engine (1) and a transmission (2) that transmits the output power to the axle as drive power. It is the structure which provided. The motor generator 2 is an AC multi-phase rotating machine, and has a structure including a stator provided inside the stator housing and a rotor provided inside the stator housing and connected to the output shaft of the internal combustion engine. A multi-phase alternating current is supplied to the stator from a power supply (not shown), and the rotational phase (that is, the frequency) of the alternating current is computer-controlled by the control device. When the rotational speed of the rotational phase is larger than the mechanical rotational speed of the armature of the motor generator (2), the motor generator (2) acts as an electric motor and gives acceleration force to the output power of the internal combustion engine. When the rotational speed of the rotational phase of the supply current is smaller than the mechanical rotational speed of the motor generator (2), the motor generator (2) acts as a generator, and the transmission (4) and the clutch (3). Acts as a braking force on the rotational force transmitted from. As a result, the running vehicle is in a braking state, and the current generated by the power generation action of the motor generator is used as a current for charging the battery.

  The numbers in the parentheses are reference numbers in the attached drawings. This is added for easy understanding of the description, and the accompanying drawings are drawings of the embodiment apparatus of the present invention, so that there is a difference from the conventional structure as will be described later. The same applies to the following description.

JP-A-8-33262 JP 2002-165420 A

  Although the above-mentioned conventional vehicle has excellent mechanical and electrical performance, it may cause the flow work to be delayed in the manufacturing process, particularly in the manufacturing process of the power unit including the internal combustion engine and the motor generator. there were. In other words, in large vehicles, there is not enough production for a hybrid vehicle to have a dedicated power unit production line. It is manufactured as a mixture. In this case, the work man-hours for motor generator axis alignment often vary, and proper axis alignment may not be completed within one tact time. In such a case, the power unit, which is a semi-finished product, is temporarily removed from the production line and a special additional work is performed, which may cause an obstacle to efficient flow work.

  The basic cause is that a gap (G) between the stator (6) and the rotor (13) is possible (see FIG. 1) in order to make the electric action of the motor generator more efficient. This is because it must be set as small as possible. This is a principle factor. If this gap is increased, it will be possible to absorb mechanical manufacturing variations, but this is not desirable in principle in terms of electromagnetic performance. More specifically, the stator (6) is a member assembled inside the stator housing (5), and the rotor (13) is a member attached to the outer periphery of the flywheel (12). As long as both the stator (6) and the rotor (13) are manufactured as individual parts, an allowable value of a certain size is set for the shape. Conventionally, the stator (6) installed inside the stator housing (5) is provided with an adjustment screw (7) that can be adjusted from the outside so that the radial position can be finely adjusted. It can cope with a certain degree of shape variation. In the conventional process, the operation of the adjusting screw (7) is executed in the manufacturing process of the power unit.

  The present invention improves this, and is a power unit (internal combustion engine, electric motor) that performs a flow adjustment operation for position adjustment between the rotor (13) or flywheel (12) and the stator (6). It is an object of the present invention to provide an apparatus and an assembling method which do not need to be performed in the manufacturing process of a generator and a unit including a flywheel. In the present invention, the position adjustment of the rotor (13) or the flywheel (12) with respect to the stator (6) is not performed in the flow operation of manufacturing the power unit. It is an object of the present invention to provide an apparatus or an assembling method that does not cause a delay in the progress of work in a process. In the present invention, this position adjustment can be performed before the power unit is supplied to the manufacturing process involving the flow operation, and the flow operation of the power unit manufacturing assembly is assembled in a form in which the position adjustment is substantially completed. An object of the present invention is to provide an apparatus and a method for supplying an object and not obstructing the flow of the manufacturing process. According to the present invention, the position adjustment is substantially completed before entering the manufacturing process of the power unit, and the adjusted member is transported and supplied to the manufacturing process involving the flow operation while maintaining the adjusted state. An object of the present invention is to provide a jig.

  The present invention properly adjusts the relative positional relationship between the rotor (13) of the motor generator mounted on the flywheel (12) and the stator (6) facing the rotor (13) in advance. Therefore, the greatest feature is that the auxiliary jig (17) is used to bring it into the manufacturing process of the power unit while maintaining this positional relationship. More specifically, the stator housing (5) is divided into a front element (5a) and a rear element (5b) on a plane perpendicular to the crankshaft (11). And it attaches to the block of an engine (1) so that a crankshaft (11) may penetrate this front element (5a). On the other hand, with respect to the subsequent element (5b), the stator (6) is attached in advance to the inside thereof, and the flywheel (12) is further moved to the subsequent element (5b) by using the jig (17) and the bolts (15 and 16). And is held between the stators (6). At this stage, the adjusting screw (7) is operated to appropriately adjust the relative positions of the flywheel (12) and the rotor (13) and the stator (6). After the adjustment, the unit comprising the element (5b) and the flywheel (12) is supplied to the power unit manufacturing and assembling process.

  With this procedure improvement, it is not necessary to adjust the positional relationship of the rotor (13) with respect to the stator (6) by operating the adjusting screw (7) in the flow operation of the power unit manufacturing and assembling process. The positional relationship is troublesome, and there is no need to perform operations such as temporarily removing units in the manufacturing process from the flow work.

That is, the first aspect of the present invention is an invention of an assembling method, in which the front element (5a) of the stator housing (5) is provided in the block of the internal combustion engine (1) so that the crankshaft (11) passes through the center hole. A first step of attaching, a second step of attaching the stator (6) of the motor generator to the inner wall of the rear element (5b) of the stator housing, and the stator attached in the second step ( place a flywheel (12) on the inside of the 6), a third step of fixing the relative position of the auxiliary jig (17) with respect to the stator (6) of the flywheel (12), the assembly conveyance path Before supplying the rear element of the stator housing, the distance between the stator and the rotor is adjusted to a predetermined value with a screw provided around the rear element of the stator housing while being fixed by the auxiliary jig. You A fourth step, attaching the auxiliary jig (17) by the crankshaft penetrating the said flywheel is fixed after the stator housing element (5b) (12) before element (5a) (11) with a fifth step of attaching the said rear element (5b) in the front element (5a), said auxiliary tool (17) the sixth to remove later the stator housing element (5b) and the flywheel (12) And a process.

The invention further serial second to fourth step, the first may be the plant for performing the fifth and sixth step to perform in different factories.

Further, the second aspect of the present invention is an invention of a motor generator, a flywheel (12) fixed to a crankshaft (11) of an internal combustion engine (1) and a rotation fixed to the flywheel (12). A stator (13), a stator housing (5) that houses the flywheel (12) and the rotor (13) inside and is fixed to a block of the internal combustion engine (1), and the stator housing (5) The stator housing (5) includes a stator (6) disposed so as to face the rotor (13) at a predetermined interval on the inner side of the stator housing (5). The structure can be divided into two or more elements including a front element (5a) and a rear element (5b) on a virtual plane (not necessarily a plane) perpendicular to the rotation axis of the stator, and the stator (6) Mounting on element (5b) Are mounted through the block to the front element of the rear element (5b) is the internal combustion engine (1) (5a), the stator before mounting the assembly transport path to an element after said stator housing before element And an adjustment screw for adjusting the distance between the rotor and the rotor to a specified value is provided around the rear element of the stator housing .

  A plurality of bolt holes (16 ') for attaching an auxiliary jig (17) are formed on the clutch side (right side in the figure) of the rear element (5b) of the stator housing, and on the clutch side of the flywheel (12) A bolt hole (15 ') used for holding the flywheel (12) in the auxiliary jig (17) may be formed.

  According to the present invention, there is a possibility that a fine work such as centering of a motor generator or a work time may vary in a flow work using a belt conveyor such as a power unit assembly process or a vehicle assembly process. One task is no longer performed, and the assembly of the motor generator does not impede the efficient execution of other tasks.

  FIG. 3 is a side view of the large vehicle power unit. In this apparatus, an internal combustion engine 1, a motor generator 2, a clutch 3, and a transmission 4 are arranged along one axis. Although this basic configuration is already widely known, this will be briefly described. This apparatus has a structure in which a motor generator 2 is interposed between the output shaft of the internal combustion engine 1 and the clutch 3. The motor generator 3 includes a rotor directly connected to a rotating shaft of the internal combustion engine 1 inside a circumferentially arranged stator, and one end of the rotating shaft is connected to an output rotating shaft of the internal combustion engine 1. The other end is connected to the input side rotating shaft of the clutch. The rotor of the motor generator 2 is mounted on this rotating shaft. A multiphase alternating current is supplied to the stator of the motor generator 2 from an inverter device (not shown). This multiphase alternating current generates a rotating magnetic field around the axis of the motor generator 2. The rotational speed of the rotating magnetic field is proportional to the frequency of the polyphase alternating current. The frequency of the polyphase alternating current is equal to the rotational speed of the internal combustion engine 1 or is faster or slower than the rotational speed of the internal combustion engine 1 using the rotational speed of the internal combustion engine 1 as input information by an electric device not shown in the figure. Controlled.

  That is, when the rotational speed of the rotating magnetic field is controlled to be larger than the physical rotational speed of the rotor, the motor generator 2 acts as an electric motor and is in a state of assisting acceleration of the rotation of the internal combustion engine 1. When the rotational speed of the rotating magnetic field is controlled to be smaller than the physical rotational speed of the rotor, the motor generator 2 acts as a generator. When a load is connected to the output of the generator, the rotation of the internal combustion engine 1 is braked.

  Here, the feature of the present invention resides in improvement of the mechanical structure of the motor generator 2 and improvement of its assembly procedure.

  FIG. 1 is a structural diagram of a state in which a motor generator 2 is connected to a crankshaft 11 of an internal combustion engine 1. The motor generator 2 is between a rotor 13 attached to the outer periphery of a flywheel 12 of the internal combustion engine 1 and a stator 6 provided inside a stator housing 5 fixedly attached to a block of the internal combustion engine 1. It operates by the magnetic action that occurs in The stator 6 is connected to an electrical control device (inverter) by a lead wire (not shown).

  Here, the problem of the present invention lies in the gap G between the rotor 13 and the stator 6. This gap G is desirably as small as possible in order to operate the motor generator 2 efficiently. For this purpose, an adjustment screw 7 is provided so that the position of the stator 6 relative to the stator housing 5 can be slightly adjusted after the flywheel 12 to which the rotor 13 is mounted is attached to the crankshaft 11. . The adjusting screw 7 provided around the stator housing 5 must be adjusted so that the gap G is less than the specified value and is uniform along the circumference. That is, in the conventional construction method, it is necessary to adjust the gap on the belt conveyor as the motor generator 2 is assembled. When the gap G cannot be adjusted to a specified range within a specified time during which the belt conveyor moves in a predetermined section, it is necessary to lower the apparatus once from the belt conveyor and make further adjustments.

  In the present invention, in order to avoid such work, the stator housing 5 is divided into a front element 5a and a rear element 5b on a plane perpendicular to the axis thereof. Then, before the assembly work on the belt conveyor, the flywheel 12 and the rotor 13 were mounted on the inner side of the element 5b, and the work procedure was changed so as to perform precise position adjustment.

  That is, referring to FIG. 2, an auxiliary jig 17 shown by hatching is prepared, and the auxiliary jig 17 is attached to the end face of the rear element 5b of the stator housing using the bolt 16, and the bolt 15 and The flywheel 12 is attached to the auxiliary jig 17 using a cylindrical separator inserted through the bolt 15. Then, the gap G is adjusted to a specified value by the adjusting screw 7. In this state, the flywheel 12 and the rear element 5b of the stator housing are supplied onto the belt conveyor. Then, the assembly work on the belt conveyor returns to FIG. 1, and the flywheel 12 is attached to the crankshaft 11 using the fixing pin 14, and the rear element 5 b of the stator housing 5 is already attached to the block of the internal combustion engine 1. This is completed by removing the auxiliary jig 17 described with reference to FIG. This work does not include fine work such as alignment and gap adjustment. Therefore, there is almost no case where the work on the belt conveyor cannot be completed within a specified time.

  Further, by using the auxiliary jig as shown in FIG. 2, the assembly of the rear element 5b of the stator housing whose sectional structure is shown in FIG. 2 is performed in a process different from the process of assembling the power unit. The manufacturing process can be configured to supply the power unit to the assembly process in the form shown in FIG.

  According to the present invention, the adjustment of the gap G illustrated in FIG. 2 is performed in a factory different from the factory that assembles the power unit, and is transported by truck with the auxiliary jig 17 mounted thereon. It can take the form which supplies to.

Sectional drawing explaining the assembly procedure of this invention Example (after completion of an assembly). Sectional drawing explaining the Example of this invention assembly (form which carries in to a production line). The side view of the power unit which implemented this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Motor generator 3 Clutch 4 Transmission 5 Stator housing 5a Front element 5b Rear element 6 Stator 7 Adjustment screw 8 Bolt 9 Bolt 11 Crankshaft 12 Flywheel 13 Rotor 14 Fixing pin 14 'Pin hole 15 Bolt 15 ′ Bolt hole 16 Bolt 16 ′ Bolt hole 17 Auxiliary jig

Claims (4)

A first step of attaching the front element (5a) of the stator housing (5) so that the crankshaft (11) passes through the center hole of the block of the internal combustion engine (1);
A second step of attaching the stator (6) of the motor generator to the inner wall of the rear element (5b) of the stator housing;
A flywheel (12) is disposed inside the stator (6) attached in the second step, and the relative position of the flywheel (12) with respect to the stator (6) is determined by an auxiliary jig (17). A third step of fixing by
Before the rear element of the stator housing is supplied onto the assembly conveyance path, the stator and the rotor are provided around the rear element of the stator housing so that the distance between the stator and the rotor is a predetermined value while being fixed by the auxiliary jig. A fourth step of adjusting with an internal screw;
The flywheel (12) fixed to the rear element (5b) of the stator housing by the auxiliary jig (17) is attached to the crankshaft (11) passing through the front element (5a) and the rear element (5b). ) and a fifth step of mounting the prior element (5a) and,
And a sixth step of removing the auxiliary jig (17) from the rear element (5b) of the stator housing and the flywheel (12). Said second to fourth steps, the first, the assembly method according to claim 1, wherein the motor generator performed in different factories and factories for performing a fifth and sixth step. A flywheel (12) secured to the crankshaft (11) of the internal combustion engine (1);
A rotor (13) secured to the flywheel (12);
A stator housing (5) in which the flywheel (12) and the rotor (13) are housed and fixed to a block of the internal combustion engine (1);
In the motor generator comprising the stator (6) disposed inside the stator housing (5) so as to face the rotor (13) at a predetermined interval,
The stator housing (5) can be divided into two or more elements including a front element (5a) and a rear element (5b) on a virtual plane perpendicular to the rotation axis of the rotor (13).
The stator (6) is attached to the rear element (5b);
This rear element (5b) is attached to the block of the internal combustion engine (1) via the front element (5a),
Before the rear element of the stator housing is attached to the front element on the assembly conveyance path, an adjusting screw for adjusting the distance between the stator and the rotor to a specified value is provided around the stator housing rear element. Motor generator. A plurality of tap holes (16 ') for attaching the auxiliary jig (17) are formed on the clutch side (right side in the figure) of the rear element (5b) of the stator housing, and on the clutch side of the flywheel (12). The motor generator according to claim 3 , wherein a tap hole (15 ') used to hold the flywheel (12) in the auxiliary jig (17) is formed.

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