JPH0510544Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnet generator with a pulser, and in particular,
Regarding the improvement of the mounting structure of Pulsa to the magnet generator,
For example, the present invention relates to a magnet generator with a pulsar that is directly connected to a vehicle engine or a general-purpose engine to obtain an ignition signal.

[Conventional technology]

A structure for attaching a pulsar to a magnet generator directly connected to a vehicle or general-purpose engine is a structure in which a stay fixed to the pulsar body made of synthetic resin is screwed onto the base of the stator of the magnet generator. (See the conventional example in Japanese Utility Model Application Publication No. 57-159387).

[Problem that the invention attempts to solve]

In a structure where the pulsar is installed on the base via a stay fixed to the pulsar body made of synthetic resin, if the base resonates abnormally, excessive force due to vibration acceleration will be applied to the stay.
The thickness of the stay plate has to be made thicker, and the pulsar becomes larger.

An object of the present invention is to provide a magnet generator with a pulsar that can improve the strength of the stay.

[Means for solving problems]

In the magnet generator with a pulsar according to the present invention, the pulsar 11
is arranged on the base 6 of the stator 5, and
This pulser 11 is fastened to the base 6 of the stator 5 via a stay 18 made of a magnetic material that is fixed to a resin-molded main body 12, and the core 13, the rotor 1, and the stay 18 In a magnet generator with a pulser having a magnetic path, the stay 18 is formed with a bent rising portion 19, and the rising portion 19 of the stay 18 is magnetically connected to the core 13. A rib 20 is embedded in the back surface of the main body 12, and a rib 20 is provided at a position facing the rising portion 19 on the end side of the rotor 1 side of the stay 18, and is directed toward the inside of the main body 12. In addition to being bent at a substantially right angle, this rib 20 is also curved in the left-right direction so as to substantially follow the outer periphery of the rotor 1, and furthermore, the rib 20 has an exposed end surface facing the rotor 1. , a part of which is the main body 12
It is characterized by being implanted inside.

[Effect]

Even if excessive vibration acceleration is applied to the pulsar, a portion of the ribs protruding from the stay are planted on the pulsar body, allowing the stay to maintain sufficient strength.
It will never become large.

In addition, because part of the rib faces the rotor, a magnetic path is effectively formed when the pulser detects the detected part, resulting in a larger degree of change in magnetic flux and higher signal detection accuracy. .

〔Example〕

FIG. 1 is a longitudinal sectional view showing a magnet generator with a pulser according to an embodiment of the present invention, FIG. 2 is an overall plan view, and FIG. 3 is a perspective view showing the pulser.

In this embodiment, the magnet generator with pulser includes a rotor, a stator, and a pulser. The rotor 1 has a plurality of magnets 3 arranged annularly and fixed to the inner circumferential surface of a yoke 2 formed in a cylindrical shape with a bottom, and the yoke 2 is rotationally driven directly or indirectly by the engine. It is adapted to be connected to a rotating shaft (not shown). A reluctor section 4 as a detected section is provided protruding from the outer peripheral surface of the yoke 2 .
The stator 5 has a base 6 formed in a substantially disk shape.
The base 6 is arranged concentrically in the opening in the yoke 2 of the rotor 1 and fixed to the outer shell of the engine. A plurality of generator coils 7 are provided on the end surface (hereinafter referred to as the top surface) of the base 6 on the rotor side.
are arranged and fixed in a ring shape within the yoke 2 so as to face the magnet 3.

A pulsar mounting portion 8 is provided on the outer periphery of the base 6 of the stator 5.
are arranged at predetermined locations and protrude in the radial direction, and the mounting portion 8 is integrally molded with the base 6 in a substantially trapezoidal plate shape. A pair of screw holes 9 are provided on the upper surface of the mounting portion 8, and are arranged such that a line connecting the two screw holes 9, 9 substantially coincides with a line perpendicular to the center of gravity of the pulser, which will be described later.

The pulsar 11 includes a main body 12 formed of resin into a substantially rectangular parallelepiped shape, and the main body 12 includes a core 13 whose tip is exposed from the main body 12;
A pulser coil 14 wound around a bobbin 15 and externally mounted on the core 13, and a magnet 16 as a magnetic flux source magnetically connected to the core 13 are built in.

At the lower end of the main body 12, a stay 18, which is integrally formed using a thin plate by press working or the like, is partially implanted and fixed inside the main body 12. It is magnetically connected to the magnet 16 at.
Ribs 2 are provided on the end of the stay 12 on the rotor 1 side.
0 is bent upward at a substantially right angle and integrally protrudes, and this rib 20 is formed in an arcuate shape curved in the left-right direction so as to substantially follow the curvature of the rotor yoke 2. The rib 20 is arranged so that a portion thereof is implanted inside the main body 12. The stay 18 also has a pair of insertion holes 21.
are arranged at both ends and are opened in the vertical direction, and both insertion holes 21 are adapted to align with the screw holes 9, respectively.

Next, the operation and operation of assembling the mounting portion and the pulser according to the above configuration will be explained.

The pulser 11 is mounted on the upper surface of the mounting portion 8 protruding from the stator base 6 so that the tip of the core 13 is directed inward and the left and right insertion holes 21 of the stay 18 are aligned with the left and right screw holes 9, respectively. It is arranged and abutted on. Subsequently, the screw member 22 is inserted into the insertion hole 2.
1 and screwed into the screw hole 9, the pulser 11 is fastened to the mounting portion 8 on the base 6. In this state, the rib 20 on the stay 18 comes close to the lower position of the reluctor section 4 on the rotor yoke 2.

When the rotor 1 is driven by the engine and revolves around the stator 5, the pulsar 11 detects the reluctor section 4 and generates an ignition signal. That is, when the reluctor section 4 passes near the core 13, the magnetic flux formed by the magnet 16 changes, so that electricity is induced in the pulsar coil 14, which is output as an ignition signal.

When the reluctor section 4 faces the core 13, the ribs 20 on the stay 18 face the rotor yoke 2 in close proximity, so that the magnetic path for the magnet 16 is changed as shown by the broken line in FIG. effectively formed. That is, when the ribs 20 are not formed, the area of the stay facing the yoke is small due to its thickness, so the magnetic resistance increases and formation of a magnetic path is hindered. but,
In this embodiment, since the rib 20 faces the yoke 2 in close proximity to it, the opposing area of the stay 18 to the yoke 2 becomes large, so that magnetic resistance is reduced and a magnetic path is effectively formed. become. Moreover, if the rib 20 is formed in an arc shape, the distance from the yoke 2 will be constant in the circumferential direction, so that the magnetic path forming effect will be even better.

By effectively forming a magnetic path in this way, the degree of change in magnetic flux increases, so the pulsar 1
The transmission output of 1 becomes large, and the detection accuracy becomes extremely good.

When operating the engine, etc., the stator base 6
If the pulsar 13 vibrates abnormally, due to the weight of the pulsar 13,
Force is generated due to vibration acceleration. At this time, in this embodiment, since the rib 20 of the stay 18 is embedded in the lower end of the pulsar main body 12, the force that tends to tilt the pulsar 11 forward is supported. Furthermore, since the rising portion 19 of the stay 18 is embedded in the pulsar body 12, the force that tends to tilt the pulsar 11 backward is supported, and its amplitude is suppressed to a small level. Furthermore, the ribs 20 can reinforce the strength of the stay 18. Moreover, since the ribs 20 are formed in a circular arc shape, the effect is even greater.

The pair of screw members 22 screwing the stay 18 are arranged so that the line connecting both screwing positions substantially coincides with a line orthogonal to the center of gravity of the pulser 11, so that the screw members 22 act on the stay 18. The bending moment will be suppressed to a small value.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes are possible.

For example, the means for fastening the stay is not limited to screw coupling, but may also be riveted coupling or the like.

[Effect of idea]

As explained above, according to the present invention, by protruding ribs on the stay fixed to the pulsar body, the durability of the pulsar can be increased even when the stator base vibrates abnormally, and the desired performance can be maintained. can be maintained forever. Further, by arranging the ribs to face the rotor, a magnetic path can be effectively formed when detecting the detected portion of the pulser, so that the transmission output can be increased and the detection accuracy can be improved.

In other words, in order to obtain the conventional output, the coil can be made smaller, the pulsar can be made smaller, and the vibration resistance can be improved as much as possible in combination with the ribs of the stay.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a magnet generator with a pulser according to an embodiment of the present invention, FIG. 2 is an overall plan view, and FIG. 3 is a perspective view showing the pulser. 1... Rotor, 2... Yoke, 3... Magnet, 4... Reluctor section, 5... Stator, 6... Base, 7... Generator coil, 8... Pulsar mounting part, 9... Screw hole, 11... Pulsar, 12... Main body, 13... Core, 14... Pulsar coil, 15
...Bobbin, 16...Magnet, 18...Stay, 19...Rise part, 20...Rib, 21
...Insertion hole, 22...Screw member.

Claims (1)

[Claims for Utility Model Registration] Core 1 disposed on the inner circumference of pulsar coil 14
3 faces the reluctor section 4 of the rotor 1,
A stay 1 made of a magnetic material has a pulser 11 disposed on the base 6 of the stator 5, and the pulser 11 is fixed to a resin-molded main body 12.
The core 13, the rotor 1, and the stay 1 are fastened to the base 6 of the stator 5 via a
8, the stay 18 has a bent rising portion 19, and the rising portion 19 of the stay 18 is magnetically connected to the core 13. The stay 18 is implanted in the back surface of the main body 12 in a state in which the stay 18 has a rib 20 on the inner side of the main body 12 at a position opposite to the rising part 19 on the end side of the rotor 1 side. The rib 20 is bent at a substantially right angle toward the rotor 1, and is also curved in the left-right direction so as to substantially follow the outer periphery of the rotor 1. Furthermore, the end surface of the rib 20 facing the rotor 1 is exposed. In this state, a part of the main body 12
A magnet generator with a pulsar that is implanted inside.