JP3473479B2 - Generator for internal combustion engine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generator for an internal combustion engine, and more particularly to a power generator for an internal combustion engine in which a grommet is provided at a portion where a wire harness passes through a crankcase. It is about the machine. 2. Description of the Related Art FIG. 3 is a longitudinal sectional view of a conventional internal combustion engine generator of this type, and FIGS. 4A to 4E show the conventional internal combustion engine generator shown in FIG. It is a front view, a longitudinal side view, a side view, a rear view, and a bottom view of the grommet used. As shown in the figure, in a conventional oil bath type generator for an internal combustion engine, a generator main body 4 for generating electric power by rotating a rotor 2 with respect to a stator 3 by utilizing the rotation of a crankshaft 1 includes: It is housed in a crankcase 5 of the internal combustion engine. The crankcase 5 includes a crankcase body 5a that houses the internal combustion engine and the generator body 4, and a cover 5b that covers the generator housing recess 6 of the crankcase body 5a. 5b is fixed to the crankcase main body 5a with screws (not shown). The rotor 2 has a flywheel 9 fixed to a tip end of the crankshaft 1 protruding into the generator accommodating recess 6 with a nut 8 via a boss 7, and a cylindrical portion 9 a of the flywheel 9. Permanent magnet 1 fixed to inner circumference
0. The stator 3 includes an annular stator core 13 fixed by screws 12 to a boss 11 projecting from the cover 5b concentrically with respect to the boss 7, and a stator core 13 formed of the stator core 13. Each salient pole portion 13a radially protruding from the outer periphery has a plurality of power generating coils 15 wound around insulating bobbins 14, respectively. Each cord 16 is connected to the output terminal of the generator body 4.
A wire harness 17 having one end connected thereto is led out of the crankcase 5 through a grommet 18 in a liquid-tight manner. The grommet 18 is a wire harness 17
A grommet body 20 having a plurality of individual cord through holes 19 through which the individual cords 16 individually constitute;
A grommet cylinder part 2 having a collective through-hole part 21 integrally formed with the grommet body part 20 and integrally penetrating the cords 16 constituting the wire harness 17.
And a mounting groove 23 for fitting into a through hole of the crankcase 5 on the outer periphery of the grommet body 20.
Is provided, and the grommet cylinder 22 is provided with the grommet main body 2.
The structure is bent in a direction intersecting the penetration direction of the individual cord through-hole 19 and attached to the crankcase body 5a. The grommet 18 is provided in a through hole 24 provided at a joint between the crankcase body 5a and the cover 5b of the crankcase 5, and the grommet body 20 is provided.
The cover groove 5b is fitted and fixed in a liquid-tight manner by tightening a screw (not shown) for fixing the cover 5b to the crankcase body 5a. At this time, each cord 16 penetrating through the individual cord through hole 19 of the grommet main body 20 is liquid-tight by a tightening pressure of a screw fixing the cover 5b applied to the grommet main body 20 to the crankcase main body 5a. The grommet body 20 is penetrated. Each cord 16 connected to the stator 3
Is fixed to the stator core 1 with the cord clamp 25
It is fixed to 3. A protection tube 26 is covered on the outer periphery of each cord 16 constituting the wire harness 17.
At the other end of each of the cords 16 constituting the wire harness 17, each of the cords 16 is stripped to expose core wires, connector terminals are connected to these core wires, and these connector terminals are inserted into a connector housing 27. 28 are formed. In such a conventional generator for an internal combustion engine,
The production of the wire harness 17 was performed as follows. Each cord 16 is passed through the individual cord through hole 19 from the left end of the grommet main body 20 shown in FIG. 4B from one end thereof, and is pulled out from the tip end of the grommet main body 20 by a required length. That is, the inner diameter of each cord individual through hole 19 is
Since each cord 16 is set to be smaller than the outer diameter of each cord 16 in order to prevent oil from leaking from the crankcase 5, when each cord 16 is passed through each cord individual through hole 19, each cord 16 must pass through the individual cord through hole. The hole 19 is forcibly expanded with a jig from the left side of FIG.
The cord 16 is guided to 9 and is pulled out from the grommet body 20 on the opposite right side by a required length with a jig having a thin tip with the tip of the cord 16 interposed therebetween. This operation is performed for the number of codes 16. Thereafter, each cord 16 is cut to a predetermined length, the bundle of these cords 16 is covered with a protective tube 26, and the cords 16 are stripped at the other end of each cord 16 to expose the respective core wires. A connector 28 is formed by connecting connector terminals to the wires and inserting these connector terminals into the connector housing 27. However, in the conventional generator for an internal combustion engine, the operation of manufacturing the wire harness 17 through the above-described steps requires skill, and an unskilled person needs to use a jig. When inserted into the grommet cylinder 22, the grommet cylinder 22 may be damaged. When the grommet cylinder 22 is bent as shown in the figure, the grommet cylinder 22 may be forcibly bent in the direction of the individual cord through-hole 19 to perform a straight work. In this case, there is a problem that the grommet tube portion 22 is easily cracked. An object of the present invention is to provide a power generator for an internal combustion engine that can easily pass individual cords through individual cord through-holes of the grommet main body even if the grommet main body is provided with an integral grommet cylinder. To provide machines. SUMMARY OF THE INVENTION The present invention is directed to a generator body which is housed in a crankcase of an internal combustion engine and generates power by rotating a rotor with respect to a stator using rotation of a crankshaft. And a wire harness, one end of which is connected to the output end of the generator main body and which penetrates the crankcase through a grommet in a liquid-tight manner and is led out to the outside. A grommet body having a plurality of individual cord through-holes penetrating through the grommet, and a grommet having a collective through hole integrally connected to the grommet body and integrally passing through each cord constituting a wire harness An object of the present invention is to improve a generator for an internal combustion engine having a structure including a cylindrical portion. In the power generator for an internal combustion engine according to the present invention, the grommet cylinder portion of the grommet is provided with a slit portion from the tip to the grommet body portion. When a grommet having such a structure is used,
Even when the grommet body is provided integrally with the grommet body, when performing the work of individually penetrating each cord into each cord individual through hole of the grommet body, open the grommet cylinder with the slit and The work can be performed by exposing the individual cord through-holes, and even if there is a grommet tubular portion, the work of passing each cord through each individual cord through-hole can be easily performed. In the present invention, when the grommet cylinder is bent at a bend in a direction intersecting with the penetrating direction of the individual cord through-hole of the grommet body, the slit is formed at the tip of the grommet cylinder. It is preferable that the bent portion is provided to extend longitudinally. With such a structure, even if the grommet cylinder is bent at the bend,
When performing the work of individually penetrating each cord into each cord individual through hole of the grommet main body part, it is possible to open the grommet cylinder part with the slit part to expose each cord individual through hole and perform the work, Even if the grommet cylindrical portion has a bent portion, the operation of passing each cord through each cord individual through hole can be easily performed. 1 (A) to 1 (E) show a first embodiment of a grommet used in a generator for an internal combustion engine according to the present invention, and FIG. ) Is a rear view of the grommet of this example, FIG. 1B is a bottom view of the grommet, and FIG.
(C) is a rear view showing the grommet of this example with the grommet tubular portion opened by its slit portion, and FIG. 1 (D) is the grommet of this example, each cord being individually inserted into each cord through hole of the grommet body. FIG. 1 is a longitudinal sectional view showing a state in which
(E) is a longitudinal sectional view showing a state in which the end of the wire harness is incorporated in the grommet of this example. In the generator for an internal combustion engine according to the present embodiment, as shown in FIG. 3, a wire harness 1 penetrating a joint between a crankcase main body 5a and a cover 5b of a crankcase 5 is provided.
The grommet 18 having a structure shown in FIGS. 1A to 1E is used as a grommet 18 for sealing a penetrating portion of each of the cords 16 in a liquid-tight manner. The grommet 18 has a grommet body 20 having a plurality of individual cord through holes 19 through which the cords 16 constituting the wire harness 17 individually penetrate.
And a grommet cylinder portion 22 having a collective through hole 21 integrally connected to the grommet main body portion 20 and passing through the cords 16 constituting the wire harness 17 collectively. The cylindrical portion 22 is bent at a bent portion 22 a in a direction intersecting the direction in which the individual cord through holes 19 of the grommet main body 20 penetrate. The grommet cylinder 22 is provided with a slit 29 on a surface outside the bend, from the tip of the grommet cylinder 22 toward the grommet body 20. This slit part 29
In particular, is provided so as to extend longitudinally through the bent portion 22a from the tip of the grommet tube portion 22. Other configurations of the generator for the internal combustion engine of this embodiment are the same as those shown in FIG. As described above, when the grommet tube portion 22 is provided with the slit portion 29 so as to extend longitudinally through the bent portion 22a, even if the grommet tube portion 22 is bent at the bent portion 22a, each of the cords of the grommet body portion 20 is individually formed. When performing the work of individually penetrating each cord 16 into the through hole 19, FIG.
(C) As shown in FIG.
2 is opened to expose the individual through holes 19 of the respective cords.
The cord passing operation can be performed from the right side of the grommet main body 20 shown in (D), and even if the grommet tube portion 22 has the bent portion 22a, the passing operation of each cord 16 through each cord individual through hole 19 can be performed. It can be done easily. An example of the operation of forming the wire harness 17 using the grommet 18 will be described. Each of the cords 16 is trimmed to a predetermined length, and the leading ends of the cords 16 are stripped to expose core wires (not shown), and connector terminals (not shown) are connected to these core wires. The terminals are inserted into the above-described connector housing 27 to form the connector 28. Next, each cord 16 is passed through the above-described protection tube 26, and the base end side of each cord 16 is led out from the base end of the protection tube 26 by a predetermined length. Next, as shown in FIG. 1 (C), a jig is inserted into the individual cord through-hole 19 which is opened by exposing the grommet cylinder portion 22 with the slit portion 29, and the grommet body portion shown in FIG. Pass the base end of the cord 16 from the right side of 20. This operation is performed for the number of codes 16. FIG. 1D shows a state in which each cord 16 is passed through each cord individual through hole 19 of the grommet main body 20 in this manner. In this state, each cord 16 is provided in the slit portion 2 of the grommet tube portion 22.
Exist across 9 Next, the grommet 18 is slid with respect to each cord 16, and the grommet 18 is positioned at a position where the protruding length of each cord 16 from the grommet main body 20 at the base end becomes a predetermined length. I do. Thereafter, each cord 16 is inserted into the slit 29
1E, the protection tube 26 is slid as shown in FIG. 1E in order to prevent the cords 16 from coming out of the grommet cylinder 22 as shown in FIG. And the end is grommet cylinder 2
2 When the operation of forming the wire harness 17 can be performed in this way, after the connector terminal is crimp-connected to the tip of each cord 16, the base end side of each cord 16 is connected to each cord individual through hole 19 of the grommet body 20. To pass
Automation of the crimping work of the connector terminal becomes possible. Also,
Normally, the grommet 18 is connected from the output end of the generator stator 3.
The length of each cord 16 from the grommet 18 to the connector 28 is
The length from the connector to the connector 28 is longer, and according to the operation of forming the wire harness 17 of the present embodiment, when the cords 16 are passed through the individual cord through holes 19 of the grommet body 20, a short distance is required. There is. FIGS. 2A to 2C show a second embodiment of the grommet used in the generator for an internal combustion engine according to the present invention. FIG. 2A shows the grommet of this embodiment. FIG. 2B is a front view, FIG. 2B is a bottom view of the grommet, and FIG. 2C is a longitudinal sectional view showing a state in which the end of the wire harness is incorporated in the grommet of this example. As shown in FIGS. 2A and 2B, the grommet 18 used in the generator for an internal combustion engine of this embodiment has a plurality of cords individually penetrating each cord 16 constituting the wire harness 17. A grommet cylinder having a grommet main body 20 having a hole 19 and a collective through-hole 21 which is integrally connected to the grommet main body 20 and collectively penetrates each cord 16 constituting the wire harness 17. The grommet tube portion 22 is bent at a bent portion 22 a in a direction intersecting with the penetrating direction of the individual cord through hole 19 of the grommet body portion 20. A slit portion 29 is provided toward the portion 20, and these points are the same as in the first example. In particular, in the grommet 18 of the present example, the surface inside the bend in the grommet cylinder 22 is
A slit 29 is provided from the tip of the grommet cylinder 22 toward the grommet body 20. The other structure of the generator for the internal combustion engine of this embodiment is the same as the structure shown in FIG. In the grommet 18 of this embodiment, the slit 2
9 and the grommet body 20 in the same manner as in the first example.
Each cord 16 is passed through the slit portion 29 to the grommet cylinder portion 22 in a state where the end portion of each cord 16 is exposed to a required length from the grommet main body portion 20. Put it. Then, in this example,
As shown in FIG. 2C, a protective tube 26 is provided to prevent the cords 16 from coming out of the grommet cylinder 22.
And the end thereof is fitted to the outer periphery of the grommet cylinder 22. In this embodiment, substantially the same effects as in the first embodiment can be obtained. In the above example, the present invention is applied to the grommet 18 in which the grommet tube portion 22 is bent in a direction intersecting the direction of each cord individual through hole 19 of the grommet body portion 20. However, the present invention is not limited to this, and the grommet 18 in which the grommet tube portion 22 is oriented parallel to the direction of each cord individual through hole 19 of the grommet body portion 20, that is, the grommet tube portion 22 is straightened. The same can be applied to the grommet 18 that is formed. The grommet cylinder 22 has a slit 2
9 is provided at the position shown in FIGS. 1A to 1E and FIG.
It is not limited to the positions shown in (A) to (C),
The position may be any position in the circumferential direction of the grommet tube portion 22. Further, the cord 1
As other means for preventing the escape of the grommet 6, taping is applied to the outer periphery of the grommet tube portion 22, the outer periphery of the grommet tube portion 22 is bound with a nylon band, and a heat shrink tube is put on the outer periphery of the grommet tube portion 22. And so on. Also, the escape of the cord 16 from the grommet tube portion 22 cannot normally occur without performing the above-described respective means, but for example, an operator performs an operation such as unplugging the wire harness 17 at the time of repair or inspection or the like. In this case, it is possible for the operator to attach each cord 16 to the grommet cylinder 22.
It may be dealt with by returning inside. In the power generator for an internal combustion engine according to the present invention, even if the grommet cylinder is provided integrally with the grommet cylinder, the grommet cylinder is directed from its tip toward the grommet body. Since a slit part is provided,
When performing the work of individually penetrating each cord into each cord individual through hole of the grommet main body part, it is possible to open the grommet cylinder part with the slit part to expose each cord individual through hole and perform the work, Even if the grommet cylinder is present, the operation of passing each cord through each cord individual through hole can be easily performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A to 1E show a first example of an embodiment of a grommet used in a generator for an internal combustion engine according to the present invention, and FIG. Rear view of the grommet of the example, (B) is a bottom view of the grommet, (C) is a rear view of the grommet of the present example showing a state where the grommet cylinder is opened by its slit, and (D) is a grommet of the present example. FIG. 5E is a longitudinal sectional view showing a state in which each cord is individually penetrated into each cord individual through hole of the grommet body, and FIG. 7E is a longitudinal sectional view showing a state in which the end of the wire harness is incorporated in the grommet of this example. is there. FIGS. 2A to 2C show a second embodiment of a grommet used in a generator for an internal combustion engine according to the present invention, wherein FIG. 2A is a front view of the grommet of the present embodiment, (B) is a bottom view of the grommet, and (C) is a longitudinal sectional view showing a state where an end of a wire harness is incorporated in the grommet of the present example. FIG. 3 is a longitudinal sectional view of a conventional generator for an internal combustion engine of this type. 4A to 4E are a front view, a longitudinal side view, and a front view of a grommet used in the conventional internal combustion engine generator shown in FIG.
It is a side view, a rear view, and a bottom view. DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Rotor 3 Stator 4 Generator body 5 Crankcase 5 a Crankcase body 5 b Cover 6 Generator recess 7 Boss 8 Nut 9 Flywheel 9 a Tube 10 Permanent magnet 11 Boss 12 Screw 13 Stator core 14 Insulation bobbin 15 Power generation coil 16 Cord 17 Wire harness 18 Grommet 19 Individual cord through hole 20 Grommet body 21 Collective through hole 22 Grommet cylinder 22a Bent 23 Mounting groove 24 Through hole 25 Code clamp 26 Protection Tube 27 Connector housing 28 Connector 29 Slit

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-55-147940 (JP, A) JP-A 55-4689 (JP, U) JP-A 6-60241 (JP, U) JP-A 51- 132516 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H02K 5/22

Claims (1)

(57) [Claim 1] A generator body housed in a crankcase of an internal combustion engine and generating power by rotating a rotor with respect to a stator using rotation of a crankshaft; A wire harness having one end connected to the output end of the generator main body and penetrating the crankcase in a liquid-tight manner through a grommet and led out to the outside, wherein the grommet is a cord that constitutes the wire harness. A grommet main body having a plurality of individually penetrated through holes and a collective through hole integrally connected to the grommet main body and collectively penetrating each cord constituting the wire harness. in an internal combustion engine for an electrical machine has a structure in which a grommet tubular portion having said grommet sleeve unit the code of the grommet main body portion
Bend in the direction intersecting the penetration direction of the individual through hole
The grommet tube portion is bent on the surface outside the bend.
Toward the grommet body from the tip of the met tube
A slit portion is provided, and the slit portion is bent from a tip of the grommet tube portion.
A generator for an internal combustion engine, which is provided so as to extend longitudinally .