JPH0352550A - Terminal base for pulse motor - Google Patents

Abstract

PURPOSE:To improve the handling property of terminals by a method wherein coil side terminals and harness side terminals are attached to the housing of a motor frame under a condition that both of them are connected mutually. CONSTITUTION:A terminal base 4 is fitted and fixed to a stator 2 so that the surface of a plate unit 40 is abutted against the end of the stator 2 while the terminal base is received in the housing 10 of a motor frame 1 together with the stator 2. Coil side terminals 42a-42f and harness side terminals 43a-43f are retained by the terminal base 4 under a condition that they are connected respectively. The coil side terminals 42a-42f are connected to the lead wires of a coil 21 while the harness side terminals 43a-43f are connected to the lead wires of a harness wire. Acoording to this method, power source may be supplied to the coil and the mounting of the terminals may be effected simultaneously with the mounting of the terminal base to the stator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a terminal base of a pulse motor used in IS for energizing a stator coil.

[Conventional technology]

Conventionally, the stator coil of a pulse motor is energized by connecting a lead wire from the stator coil and a lead wire of a power source harness wire through a terminal. The terminal provides continuity between the coil side lead wire and the power source side lead wire.

[Problem to be solved by the invention]

However, a large number of lead wires are provided depending on the number of phases of the coil, and when connecting the lead wires on both the coil side and the power supply side with corresponding terminals, the handling of the terminals becomes complicated. There is. Furthermore, it is necessary to set the terminals after connection so that they do not interfere with the motor frame, etc., and this work becomes troublesome when there are many terminals.

Therefore, the present invention provides a new terminal base in order to improve the handling properties of the terminal.

[Means to solve the problem]

The terminal base of the pulse motor according to the present invention has a wiring part that interconnects a coil-side terminal serving as an input terminal of each phase coil of a stator and a harness-side terminal serving as an output terminal of a power supply, It is characterized by being attached to the housing of the pulse motor while holding the terminal.

[Effect]

In the above configuration, the terminal is set by attaching the terminal base to the housing, and
By connecting the lead wire of each phase coil and the lead wire on the power supply side to this terminal, each phase coil is brought into conduction.

〔Example〕

FIG. 1 shows a sectional view of a pulse motor to which an embodiment of the present invention is applied. A stator 2 is attached to the inner surface of a motor frame 1, and a rotor 3 is inserted into the stator 2 in the axial direction.

The motor frame 1 is composed of a cylindrical housing 10 and a cover plate 11 bolted to one end (left end) of the housing 10.
An output end 33 of the rotor shaft 30 projects from the. On the other hand, a stator 2 is fixed within the housing 10. The stator 2 includes a stator core 20 in which a large number of thin silicon steel plates are laminated, and a coil 21 wound around the stator core 20.

As shown in FIG. 3, the stator core 20 has 8 salient poles 2
2, and a slot 23 into which a coil wound around the salient pole 22 is inserted, and a semi-circular groove 24 is formed in the axial direction on the outer surface of the slot 23. As will be described later, a locking pin 25 (see FIG. 4) is inserted into this groove 24, and the pin 25 prevents relative rotation between the stator 2 and the housing 10.

The stator 2 is press-fitted and fixed into the housing 10 with the coil 21 wound around the stator core 20, and this press-fitting is performed by hot press-fitting. That is,
heating the housing 10 to a predetermined temperature to bring it into a thermally expanded state;
The stator 2, which is at room temperature or cooled, is inserted into the housing 10 in this state, and when the stator 2 is inserted, that is, when it is hot, a clearance fit is possible, and after insertion, it is a tight fit. be.

The specific heating temperature of the housing 10 is changed as appropriate depending on the material, dimensions, etc. of the housing. For example, in the case of aluminum or aluminum alloy, the heating temperature is 20
Heating to around 0°C is sufficient. Since the inner diameter of the housing 10 is somewhat increased during this hot pressing, the stator 2 can be pressed into the housing 10 smoothly. Therefore, since the stator core 20 does not interfere with the inner surface of the housing 10, pressure burrs do not occur on the inner surface of the housing 10. Further, since the stator is not deformed at all when the stator is press-fitted, dimensional changes in the stator due to temperature fluctuations can be suppressed, and fluctuations in the gap between the stator and the rotor 3 can be suppressed. When the housing 10 is left to cool after hot pressing, the housing 10 comes into close contact with the stator 2, so that the stator 2 is reliably fixed. Fixing the stator 2 by such a hot presser makes it possible to secure the press-fitting allowance between the stator 2 and the housing 10 even if the coil 21 becomes hot due to heat generation during operation of the pulse motor, thereby preventing temperature rise. Accurate operation can be maintained even when

FIG. 4 shows the stator 2 in a compressed state in the housing 10, with the coil 21 omitted and only the stator core 20 shown. Groove 2 formed on the outer peripheral surface of stator core 20
4 and the inner surface of the housing 10 define a communication hole 12. After the stator 2 is press-fitted, a detent pin 25 is driven into the communication hole 12. As shown in FIG. 8, the anti-rotation pin 25 is bent to have a U-shaped cross section, and has a wedge shape that increases in height from the leading end 25a to the rear end 25b. The locking pin 25 is made of a material softer than the material of the housing 20 and is molded into the shape shown in the figure, and the locking pin 25 is deformed by driving without deforming the housing 20. The locking pin 25 is driven into the groove 24 of one of the stator cores 20 and the communication groove 12 of the housing 10, which are in communication with each other, and the tip portion 25a
These grooves 24.12 have their openings in the housing 20.
Insert it so that it faces to the side and strike the rear end portion 25b. Due to this driving, the detent pin 25 exhibits a wedge effect,
Since stator core 20 and housing 10 are fixed to each other, relative displacement in the circumferential direction thereof is prevented.

As a result, the stator 2 is locked with respect to the housing 10 and does not rotate relative to the housing 10, so that the motor can be operated at a highly accurate operating angle. Note that the detent pin 25 may be driven into at least one location, and the number thereof is not particularly limited. Further, the cross-sectional shape may be semicircular.

The housing 10 in which the above-described hot press-fitting is performed is formed by casting, and in this casting, a mold is used that is divided into left and right parts with line B--B in FIG. 4 as a boundary line. That is, the casting mold consists of left and right molds for molding two halves of the housing 10 in the longitudinal direction, and the housing 10 is cast with these left and right molds butted against each other. After this casting, the mold is separated into left and right parts, and the housing 10, which is a molded product, is taken out.

In the left and right molds divided into two in the longitudinal direction of the molded product in this manner, the wall thickness of the molded product in the longitudinal direction can be made uniform, and the difference in thickness can be set to, for example, 0.1 mm or less. On the other hand, if the mold is divided in the direction perpendicular to the longitudinal direction of the hollow product, that is, in the radial direction of the housing 10, it is necessary to provide a punching taper in the mold, so the difference in wall thickness in the longitudinal direction is 2. 3 inches, which is not preferable.

Therefore, when the housing 10 is cast using such a mold divided into two parts in the longitudinal direction, the wall thickness of the body part (section C in FIG. 1) into which the stator 2 is press-fitted becomes uniform;
Since the press-fitting stress at the time of press-fitting the stator becomes uniform over the entire inner surface of the housing 10, partial deformation of the stator 2 and the housing 10 is eliminated, and reliable motor operation can be obtained.

The housing 10, which is shaped by the above-described casting, has a first
As shown in the figure, the stator 2 is bent inward and extended from the right end of the body (portion C) on which the stator 2 is pressed, and a bracket portion 13 is integrally formed in this extended portion. There is. This bracket part 13 holds the bearing 15 at the inner end of the rotor shaft 30, and also holds the coil 2 of the stator 2.
Head part 4 of terminal base 4 for supplying power to 1
It acts to fix 1. That is, the head portion 41 of the terminal base 4 is fitted and supported between the bracket portion 13 and the outer surface portion of the housing 10 facing the bracket portion 13. In order to provide this support, the bracket portion 13 has a short cylindrical shape. Water escape grooves 14 are formed in the outer surface of this bracket portion 13 in the circumferential direction. The water escape groove 14 is formed on the outer surface of the bracket part 13 so that water that has entered the housing 10 can be quickly discharged at the time of entry. Water may infiltrate through the contact area between the terminal base 4 and the bracket part 13, and the infiltrated water travels through the rotor shaft 30 and reaches the rotor 3 and stator 2, causing them to rust. The water escape groove 14 directs this water to the housing 10.
By forming the water escape groove 14, water that has entered into the housing 10 can be effectively guided below the stator 2. Note that the water guided below the stator 2 is discharged to the outside through a drain hole (not shown) formed in the housing 10. Therefore,
By forming the water escape groove 14 in the bracket part 13, water infiltration into the housing 10 is prevented, and the rotor 3
Thus, the stator 2 and the stator 2 do not rust, and deterioration of motor characteristics due to rusting can be prevented.

As shown in FIGS. 1 and 5, the rotor 3 has a magnet 31 and a rotor core 32 on the outer surface of the rotor shaft 30.
It is constructed by attaching. Rotor shaft 3
0 is rotatably supported by a bearing 15 such as a ball bearing attached to a cover plate 11 and a bracket part 13 of the housing 10, and its left end penetrates the cover plate 11 and protrudes to the outside of the motor frame 1. It serves as an output end 33. An output gear 34 is attached to the output end 33 of the rotor shaft 30 for transmitting power to external equipment. FIG. 6 shows a structure for attaching the output gear 34 to the output end 33 of the rotor shaft 30. The output gear 34 is attached to the rotor shaft 30 by a presser.
4 includes a main body portion 34a having gear teeth formed on its outer peripheral surface, and a cylindrical sleeve portion 34b extending from the main body portion 34a in the direction of the rotor shaft 30. On the other hand, the output end 33 of the rotor shaft 30 has a guide portion 33a formed at its tip portion to be inserted into the main body portion 34a of the output gear 34, and a press-fit portion 33b is continuously connected to the guide portion 33a. has been done.

The press-fitting part 33b of the rotor shaft 30 fixes the output gear 34 to the rotor shaft 30 by being press-fitted into the sleeve part 34b of the output gear 34, and the guide part 33a of the rotor shaft 30 is inserted into this presser. It is first inserted into the main body 34a of the output gear 34 to guide it in the axial direction during press-fitting. In this case, as shown in the enlarged view of the figure, triangular pressure teeth 35 are formed in the axial direction on the outer surface of the press-fitting portion 33b of the rotor shaft 30 to prevent rotation of the rotor shaft 30. There is. In this structure, in which the output gear 34 is constituted by the main body part 34a and the sleeve part 34b, and the output gear 34 is fixed by compressing the compression part 33b of the rotor shaft 30 to the sleeve 34b, the stress when the rotor shaft 30 is compressed is reduced. does not act directly on the main body portion 34a. Therefore, the main body portion 34a having gear teeth is not affected by external deformation due to the rotor shaft pressure, and power can be accurately transmitted and highly accurate operation can be ensured.

Magnet 3l and rotor core 32a in rotor 3,
As shown in FIG. 5, the mounting structure of magnet 32b is such that magnet 31 is located within rotor cores 32a and 32b. The rotor cores 32a, 32b are constructed by laminating a large number of thin steel plates punched into a predetermined shape in the axial direction of the rotor shaft 30.
0 is press-fitted into the magnet 31 and the rotor cores 32a, 32b, thereby fixing the magnet 31 and the rotor cores 32a, 32b.

In the figure, 36 is a rotor core 32a. 32b, and are used to maintain the laminated state of the thin steel plates. The magnet 31 is sandwiched between such rotor cores 32a, 32b.
It is located in A circumference 37 is formed in the rotor core portion where this magnet 31 is located. The circumference 37 is formed by providing a gap between the rotor cores 32a and 32b, and extends along the circumference of the magnet 31 in a radial direction from a substantially central portion of the magnet 31, and has an outer end. section is open. An adhesive 38 is injected into the circumferential groove 37 as shown in FIG.

With this adhesive 38, the magnet 31 is attached to the rotor core 32.
The rotor core 32 is fixed relative to the rotor core 32, thereby preventing relative displacement with the rotor core 32. Next, the operation of attaching the magnet 31 and rotor cores 32a, 32b to the rotor shaft 30 will be explained with reference to FIG. First, the thin steel plates are laminated and the stud 36
(See Figure 5)
2a and 32b are formed. This laminated plate 32a. 32b is defined as having a "U"-shaped cross section. And this laminate plate 32
The rotor shaft 30 is press-fitted into the magnet 31 so that the magnet 31 fits into the inside of the magnet 31. after that,
The other laminate plate 32b or 32a is fixed to the rotor shaft 30 by press fitting. This other laminate 32b or 3
2a is press-fitted and fixed to one of the laminated plates 32a or 32b so that the magnet 31 is sandwiched therebetween. As a result, the magnet 31 is sandwiched between the laminated plates 32a and 32b, and a circumferential groove 37 is formed between the laminated plates 32a and 32b.

Then, an adhesive 38 is injected into the circumferential groove 37, and as a result of this injection, the adhesive 38 solidifies so as to close the circumferential groove 37. Due to the solidification of the adhesive 38, the magnet 31 is fixed without causing any positional deviation relative to the rotor cores 32a, 32b.

In such a mounting structure, the adhesive 38 is attached to the magnet 3.
Since it is provided in one radial direction and is located on the end face of the magnet 31, it does not interrupt the magnetic path of the rotor cores 32a, 32b (this magnetic path runs in the lamination direction of the laminated layers Vi32a, 32b). Therefore, the magnetic path resistance is not increased by the adhesive 38, and a highly efficient pulse motor can be obtained.

Next, a power supply system to the coil 21 of the stator 2 will be explained. 9 to 16, in order to connect the harness wire 8 (see FIG. 20) that conducts the lead wire from the coil 21 and the external power source, the right end of the housing 10 is shown from the left end side as shown in FIG. 1. Terminal base 4 inserted into the side
shows. The Yuichi Minane base 4 consists of a plate portion 40 that is aligned with the right end surface of the stator 2, and a head portion 41 that is formed to protrude from one side of the plate portion 40.
The whole is integrally formed of a non-conductive material such as plastic. The plate portion 40 is shown in FIGS. 12 and 13.
As shown in the figure, it consists of a lower bullet part 40a and an upper plate part 40b, and the stator 2 is fixedly attached to the lower plate part 40a.

On the other hand, the coil 21 of the stator 2 is provided on the upper plate portion 40b.
Coil side terminal 42a to which the lead wire from
~42f are arranged along the circumferential direction. The head portion 41 is integrally formed on one side of the upper plate portion 40b. The head portion 41 is formed into an oval cross-sectional shape, and harness side terminals 43a to 43f connected to the harness wire 8 on the power source side are drawn out. These coil-side terminals 42a to 42f and harness-side terminals 43a to 43f are connected to each other by wiring portions (shown by chain lines in FIGS. 11 and 13) patterned on one side of the plate portion 40 of the terminal base 4. (for example, 42a and 43a). As shown in FIG. 2, such a terminal base 4 is fixed to the stator 2 by fitting the plate portion 40 to the end of the substantially cylindrical stator 2 so as to make surface contact therewith. FIG. 15 shows a state where the terminal base 4 is housed in the housing 10 of the motor frame 1 together with the stator 1, and the coil side terminals 42a to 42f and the harness side terminals 43a to 43f are connected to the housing 1.
It is located in the upper half of 0. The terminal base 4 as described above holds the coil side terminals 42a to 42f and the harness side terminals 43a to 43f in a connected state, respectively (see Figs. 11 and 13), and the coil side terminals 42a to 42f are held in a connected state. By connecting to the lead wire of the coil 21 and connecting the harness side terminals 43a to 43f to the lead wire of the harness wire 8, the power supply can be supplied to the coil 21, and the terminal base 4 can be attached to the stator 2. This allows the terminal to be attached at the same time. Therefore,
Wiring when assembling the pulse motor is simplified, and the terminal is also easier to handle.

As shown in FIG. 2, the head portion 4l of the terminal base 4 extends in the axial direction of the stator 2 when attached to the stator 2, and faces the bracket portion 13 of the housing 10 as described above. It is designed to be fitted between the outer surface of the housing 10 (see FIG. 1). As shown in FIGS. 2 and 9 to 11, an annular groove 44 is formed at an appropriate position on the outer circumferential surface of the head portion 41 at this fitting portion. A seal ring 45 (see FIG. 1) such as an O-ring is wound around this annular groove 44. The seal ring 45 contacts the outer surface of the head portion 41, the bracket portion 13 of the housing 10, and the inner surface of the outer surface portion of the housing 10 facing the bracket portion 13, thereby sealing the space between them. Therefore, water does not enter through the sliding contact portion between the head 41 and the housing 10, and rusting of the rotor 3 and stator 2 due to people soaking in water can be prevented. In this case, as will be described later, the outside of the terminal base 4 is covered with a cover 5 made of wood + 1W botting, and the Yuichi terminal base 4 is
Since it is sealed, it has been treated to prevent people from immersion in water, and is strictly waterproof and waterproof. It has 3 structures. Since the seal ring 45 prevents water from entering through the head portion 41 of the terminal base 4, an annular groove is formed in the bracket portion 13 of the housing 10 and the outer surface portion of the housing 10 facing thereto. The seal ring 45 may be formed and fitted into this groove, or a plurality of seal rings 45 may be provided.

Each terminal 42a located in the evening terminal base 4
~42f and 43a ~43f are shown in Fig. 12 and 1
As shown in Fig. 3, the rUJ shape or the rUJ shapes are cut into a clip shape in which they are connected in series, and each terminal holds the lead wire from the coil 21 of the stator 2 or the lead wire from the harness wire 8. , and are connected to each lead wire by electrical fusion (hereinafter referred to as electrodeposition). FIG. 16 shows this electrodeposition process. Same figure (
In a), 46 is a terminal, which corresponds to the terminals 42a to 42f and 43a to 43f.

The lead wire 47 is inserted into the terminal 46 (FIG. 16(b)), and the terminal 46 is caulked to sandwich the lead wire 47. The lead wire 47 is sandwiched between the terminals 46 with the insulation coating still applied, and then, as shown in FIG. 4C, the terminal 46 is sandwiched between a pair of electrodes 48, and the electrodes 48 are energized. This energization is performed in two stages: first, a preliminary current is applied, and then a main current is applied. The terminal 46 generates heat due to the application of the preliminary current, and the insulation coating of the lead wire 47 melts due to this heat generation. When the main current is applied, the terminal 46 further generates heat, causing an alloying reaction with the metal forming the sword wire, and as a result, the terminal 46 and the lead wire 47 are electrodeposited. Such electrodeposited connections do not deteriorate or peel off at the electrodeposited sites even under high temperatures, and have good heat resistance. Therefore, even if the motor is heated to a relatively high temperature due to self-heating during operation or radiant heat from the outside, the terminal 46
The connection state between the lead wire 47 and the lead wire 47 is maintained, and a reliable connection is possible.

In addition, electrodeposition is a method that connects by supplying current,
By monitoring the supplied current, it becomes easy to determine whether the connection is good or not. That is, the main current for the alloying reaction is monitored, and if this main current reaches a predetermined value, it can be determined that the connection is good, and in other cases, it can be determined that the connection is poor.

As shown in FIGS. 12 and 13, among the terminals arranged on the terminal base 4, the coil side terminals 42a to 42f connected to the stator coil side are the upper half of the plate portion 40 of the base 4 (i.e. , are located along the circumferential direction on the outer periphery of the upper plate portion 40b).

The pulse motors in this embodiment are #1 to #1 as described later.
It has a #4 4-phase coil, and # is connected to terminal 42c.
One end of the 1-phase coil is connected to the terminal 42d, one end of the #3-phase coil is connected to the terminal 42b, one end of the #4-phase coil is connected to the terminal 42e, and one end of the #1-phase coil is connected to the terminal 42a. The other end of the coil of #3 and the other ends of the #2 phase and #4 phase are connected to the terminal 42f. These terminals 42a to 42f are arranged on the circumference of the terminal base 4 having the same center as the plate portion 40 formed in a substantially disk shape.

The terminals 42a to 42f are connected to the lead wire from the coil 21 of the stator 2 by electrodeposition described above, with the lead wire from the coil 21 of the stator 2 being sandwiched between them.
By arranging the electrodes 42f on the same circumferential line, the electrodepositing operation becomes easier and uniform electrodeposition can be achieved. That is, when performing electrodeposition, by rotating the terminal base 4 together with the stator 2, the 16th
Terminals 42a to 42f are connected between the pair of electrodes 48 shown in the figure.
can be positioned sequentially. In electrodeposition using this pair of electrodes, all the terminals 42a to 42f can be electrodeposited under the same conditions by monitoring the electrodes, thereby eliminating variations in the electrodeposition state.

FIG. 17 is a developed view of the windings of the coils for the eight salient poles 22 of the stator core 20, and the salient poles are excited by supplying current to each phase coil of #1 to #4 as shown in the figure. It has become. The coils of the #1 to #4 phases are connected to coil side terminals 428 to 42f of the terminal base 4, as shown in FIG. 12. Generally, in a four-phase pulse motor, power is not supplied to the #1 phase and #3 phase coils at the same time, and similarly, power is not supplied to the #2 phase and #4 phase coils at the same time. In this embodiment, in consideration of this point, as shown by points 50 and 51 in FIG.
The power lines V 1 and V 2 to the 3-phase coils are made into a single common line, while the power lines V 1 and v 4 to the #2 phase t3 and #4 phase coils are made into the other 2 single common lines. That is, for a four-phase coil, there are two power lines, V1, 3, and V2. By dividing the power lines 2 and 4 into two systems, the current flowing from the power line to each phase coil becomes uniform.

In order to create two power supply lines, terminals 42a. As shown in FIGS. 12 and 13, 42f is formed into a clip shape in which portions having an rUJ-shaped cross section are arranged in series so as to face each other. FIG. 18 shows a terminal 49 representative of these terminals 42a and 42f, in which a pair of electrodeposited pieces 49a and 49b are arranged opposite each other, for example, the lead wire of the #1 phase coil is electrodeposited on the electrodeposited piece 49a, By electrodepositing the lead wire of the #3 phase coil on the electrodeposited piece 49b, it is possible to make the power lines of the #1 phase and #3 phase coils common through the terminal 49. In the terminal 49 that performs such commonization, the electrodeposited pieces 49a. There is a split groove 4 between 49b
9c is formed. The dividing groove 49c is formed by each electrodeposition 49a, 4
The electrodeposited pieces 49a and 49b are formed independently at the tip of the terminal 49. In this way, the electrodeposited piece 4
By providing a discount 49C between 9a and 49b,
The heat capacities of the electrodeposited pieces 49a and 49b can be made equal, and also the heat capacities of the electrodeposited parts of other terminals can be made equal. Therefore, the individual electrodeposited pieces 49a, 49
b is the other terminal 42b to 4 formed into rUJ shape.
It can be subjected to electrodeposition under the same conditions as 2d.

Therefore, the electrodeposition at the terminal 49 (that is, the terminals 42a and 42f) to be made common can also be made uniform, and reliability is improved.

The above-mentioned terminal base 4 is shaped so that its head portion 41 extends in the axial direction of the stator 2, and a harness side terminal 43 is drawn out from this head portion 41.
a to 43f are connected to harness tIjA8 by electrodeposition. FIG. 20 and FIG. 21 show the connection structure with this /%-ness wire 8. harness wire 8 is 6
Book lead wires 8a are bundled, and a socket 9 connected to an output terminal of an external power source is attached to the end thereof. On the other hand, each lead wire 8a is pulled out from the end on the motor side, and the tip end of each lead wire 8a is connected to the corresponding harness side terminal 43a to 43f by electrodeposition. In this case, a four frame-shaped frame bracket 16 is formed on one end surface (right end surface in FIG. 1) of the housing 10 of the motor frame 1, and a grommet 7 is fitted into the frame bracket 16. Ori, /
After the lead wire 8a of the X-ness wire 8 passes through this grommet 7, it is connected to each harness side terminal 432 to 43f. In FIG. 20, 6 is a lead wire 8a of the terminals 43a to 43f and /\-nes wire 8.
This is an insulator provided at the electrodeposition site. This insulator 6 is a member that prevents the terminals 43a to 43f from coming into contact with each other, and is molded from an insulating material such as synthetic resin or rubber. FIG. 19 shows details of this insulator 6, in which terminal set portions 6a partitioned by thin partition walls are arranged side by side on the upper surface. The electrodeposited pieces of the terminals 43a to 43f are set in each terminal setting portion 6a, so that the electrodeposited pieces of the terminals 43a to 43f do not interfere with each other.

Further, each set portion 6 is provided on the lower surface of the insulator 6 facing each terminal set portion 6a through a communication window portion 6b.
A guide 6C that is continuous with a is formed. In such an insulator 6, the terminals 43a to 43f connected to the lead wire 8a of the harness wire 8 are set in a divided state, so mutual interference between the terminals can be prevented, and short circuits between the terminals can be prevented.

Each lead wire 8a of the harness wire 8 is inserted through the grommet 7, and the tip of each lead wire 8a is drawn through the grommet 7 into the guide groove 6c of the insulator 6. The grommet 7 is configured such that each lead wire 8a is inserted through the grommet 7 independently in a separated state, and for this reason, the grommet 7 is formed with a plurality of holes through which each lead wire 8a is inserted. Each lead wire 8a of the harness wire 8 is inserted through such a hole and drawn into each guide m6c of the insulator 6, and the hole of the grommet 7 and the guide tj6c of the insulator 6 correspond one to one. There is. The grooves of the grommet 7 and the guide lm of the insulator 6, which correspond to each other, are formed at positions deviated from a straight line.

In other words, the hole of the grommet 7 corresponding to the guide groove 6c of the insulator 6 is not located on the extension line of the guide groove, but is provided at a position slightly shifted from the extension line. The guide groove 60 of such an insulator 6
With the arrangement of the holes in the grommet 7, each lead wire 8a of the harness wire 8 is bent from the grommet 7 toward the insulator 6, as shown in FIG. 6 guide groove 6c
It is designed to be inserted into. That is, each leat wire 8a is partially bent. Even if a load in the tensile direction is applied to the harness wire 8 due to this bending, the load is dispersed at the bent portion 8b of the lead wire 8a, so that the lead wire 8a
The load acting on the electrodeposited portions of the terminals 43a to 43f becomes smaller. Therefore, damage to the electrodeposited portion is suppressed and reliability is increased.

In FIG. 21, reference numeral 5 indicates that after the lead wire 8a of the harness wire 8 and the terminals 43a to 43f are electrodeposited as described above, the terminals 43a to 43f are bent downward in the drawing and are insulated from each other by the inulator 6. , is a cover formed by resin potting on the frame portion 16 of the housing 10, and the formation of this cover 5 seals the electrodeposited portions of the terminals 43a to 43f.

〔Effect of the invention〕

As explained above, the terminal base of the present invention is attached to the housing of the motor frame with the coil side terminal serving as the coil side input terminal and the harness side terminal serving as the power supply side output terminal interconnected. Even if the number is large, the handling property will be improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a pulse motor to which an embodiment of the present invention is applied, Fig. 2 is a side view of the part with the motor frame removed, Fig. 3 is a front view showing the stator core, and Fig. 4 is the stator core. FIG. 5(a) is a front view showing the state in which it is attached to the housing. (b) is a front view and a side view showing the rotor, FIG. 6 is a sectional view showing the state of press fitting between the rotor shaft and the output gear, and FIG. 7 is a sectional view showing the state of attachment of the magnet and rotor core to the rotor shaft. Figure 8 (a
), (b), and (c) are side views, front views, and plan views showing the locking pin; FIG. 9 is a plan view showing the terminal base; FIGS. 10 and 11 are side views and cross-sectional views thereof; Figure 12 is a front view of the terminal base, Figure 13 is its rear view, Figure 14 is a front view showing the terminal base attached to the stator, and Figure 15 is a front view showing the terminal base inserted into the motor frame. Figure, 16th
Figures (a), (b), and (c) are perspective views showing the terminal electrodeposition process, Figure 17 is a developed view of the coil windings, Figure 18 is a perspective view of the terminal, and Figure 19 (a). , (b) is a front view and a plan view showing the insulator, Fig. 20 is a front view showing the wiring state between the insulator and the grommet, and Fig. 21 is the state shown in Fig. 20 with resin botting applied. The front view which shows a later state. 1...Motor frame, 2...Stator, 3...
・Port, 4...Terminal base, 5...Cover 5...Insulator, 7...Grommet, 10.
...Housing, 11...Cover plate, 12...
Communication hole, 13...Bracket part, 14...Water escape groove, 15...Bearing, 20...Stator core, 21...
・Coil 22... salient pole, 23... slot, 24...
... Concave groove, 25... Rotation pin, 30... Rotor shaft, 31... Magnet, 32... Rotor core, 32a... Laminate plate, 32b... Laminate plate, 33...
...Output end, 33a...Guide part, 33b...Press-fitting part, 34...Output gear, 34a...Main body part, 34b
...Sleeve part, 35...Press-fit tooth, 36...Stud, 37...Peripheral groove, 38...Adhesive, 40...
Plate part, 41... Head part, 42a to 42f...
- Coil side terminal, 43a to 43f... Harness side terminal, 44... Annular groove, 45... Seal ring, 46.49... Terminal, 47... Lead wire, 48... Electrode.

Claims (1)

[Claims] The pulse motor housing has a wiring section that interconnects the coil-side terminals that serve as input terminals of each phase coil of the stator and the harness-side terminals that serve as the output terminals of the power supply. A terminal base for a pulse motor, which is characterized by being attached to.