JPH0419980Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a signal generator for an internal combustion engine that adjusts an air gap between a rotor and a signal generator.

[Conventional technology]

In order to adjust the air gap between the rotor and the signal generator, the conventional type has a notch on the outer periphery of the signal generator bracket, and a recess that supports the adjustment tool in the mounting plate facing this notch. Alternatively, the air gap is adjusted by providing a convex part and moving an adjustment tool (for example,
52-28011).

[Problems to be solved by the invention] However, in the above-mentioned conventional bracket, a notch is provided on the outer periphery of the bracket, and the mounting plate facing the notch has a convex or concave portion that supports the adjustment tool. Because of this, it was necessary to secure a separate space around the outer periphery of the bracket for adjusting the air gap.

Therefore, the present invention eliminates the need for adjustment space on the outer periphery of the bracket and reduces the overall size.

[Means for solving problems]

Therefore, in the present invention, a hole for adjustment is formed in the bracket, and the adjustment tool support portion is made to face inside this hole.

[Effect]

This allows the air gap to be adjusted by inserting an adjustment tool into the adjustment hole formed in the bracket.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a rotating shaft that is rotationally driven in synchronization with an internal combustion engine (not shown);
21 and 22 are rotors fitted to this rotating shaft 1;
3A to 3C are signal generators that generate signals by the rotation of both rotors 21 and 22; 4 is a signal generator 3A;
~3C is a signal generator that generates a signal by the rotation of both rotors 21 and 22, and 4 is a signal generator 3A~3
C, a housing containing the rotors 21, 22, the rotating shaft 1, and a support (not shown) that supports the rotating shaft 1; 5, the rotors 21, 22 and the signal generators 3A to 3;
Tool (driver) for adjusting the air gap with 3C, 61 and 62 are signal generators 3A to 3C
This is a bolt for fixing the housing 4 to the housing 4.

The details of the signal generators 3A to 3C and their circumferential structure will be described in detail below, with the signal generator 3A being representative. Reference numeral 31 denotes a pickup coil for converting changes in magnetic flux into voltage. A magnetic circuit for applying changes in magnetic flux to this coil 31 is composed of a magnet 33, brackets 32 and 34 made of magnetic material, a housing 4, and rotors 21 and 22. ing.

Numerals 351 and 352 are non-magnetic bolts for fixing the magnet 33 and the bracket 32 to the bracket 34.

The bracket 34 thus holding the signal generator
is attached to the housing 4, which serves as a mounting part, so that the air gap between the signal generator (particularly the tip of the bracket 32) and the rotors 21, 22 can be adjusted. There are emphasis points. The fulcrum is for pivoting the bracket 34 so that it can rotate eccentrically with respect to the rotors 21 and 22, and the screw 62 serves as the fulcrum.
Hole 34 that can be fitted loosely with a small clearance compared to 2.
A is provided. The force point is provided as a pin 41 (the pin 41 is driven into the housing 4) for supporting the adjustment tool 5 in the vicinity of this fulcrum. The bracket 34 is formed with an adjustment hole 34c, which allows the pin 41 to face and a space for the adjustment tool 5 to be accommodated, that is, a substantially triangular hole. The bracket 34 can be rotated about the screw 62 by engaging the adjustment tool 5 with the screw 62 and operating the adjustment tool 5 using the pin 41 as a force. In addition, this bracket 34
For the amount of rotational displacement required for air gap adjustment,
In order to prevent the screw 61 from interfering with the bracket 34, the prepared hole 34b for inserting the screw 61 formed in the bracket 34 is an elongated hole concentric with the fulcrum (screw 62) or a hole with sufficient clearance for the screw 61. It is set as.

Next, a method for adjusting the air gap in the above configuration will be explained.

First, insert the adjustment tool 5 into the hole 34C of the bracket 34.
After insertion, the pin 41 is engaged with the inner wall of the hole 34C, and the adjustment tool 5 is used to move the hole 34C from the position A to the position B in FIG. That is, by twisting the adjustment tool 5 clockwise using the pin 41 as a point of force, the bracket 34 rotates in the same direction using the screw 62 as a fulcrum.
As a result, the bracket 32 moves toward the rotor 22.
Moving from A' to B', the air gap becomes smaller.

Next, twist the adjustment tool 5 counterclockwise to move the hole 34C of the bracket 34 from the position A to the position C.
When the bracket 32 is moved to the position A' to C', the air gap becomes wider.

In addition, the inner wall of the adjustment hole 34C has a notch shape so that it can reliably engage with the tool 5 and receive force, and the end of this notch is open on the outer peripheral side of the bracket 34. Also, hole 34
The shape of C is not limited to almost triangular, but also almost circular,
It may be approximately rectangular or the like.

Also, the focus is on the tool 5 instead of the pin 41.
The housing 4 may be provided with a recess into which the housing 4 is fitted.

In addition, in this embodiment, each signal generator 3A to 3C
Although the bracket 34 is attached directly to the housing 4, it may also be fixed on a plate rotatably attached within the housing 4.

In addition, the signal generators 3A to 3C and the rotor 2
The numbers 1 and 22 are not limited to those in the embodiments described above, and the present invention can be applied to any number as long as there is one or more.

Further, the present invention is applicable to the signal generator not only for an electromagnetic pickup but also for a contact type breaker, a Hall element type, and the like.

[Effect of idea]

As described above, in the present invention, the air gap is adjusted by inserting the adjustment tool into the adjustment hole formed in the bracket, so the adjustment space on the outer periphery of the bracket, which was conventionally required, is no longer required. This has the excellent effect of reducing the overall size.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the device of the present invention;
FIG. 2 is a schematic plan view of main parts for explaining the adjustment method in the above embodiment. 3A to 3C...Signal generator, 4...Housing forming the mounting part, 5...Adjustment tool, 21, 22...
Rotor, 34...Bracket, 34C...Adjustment hole, 41...Pin forming adjustment tool support, 62
...A screw that also serves as a fulcrum.

Claims (1)

[Scope of utility model registration request] A rotor that rotates in synchronization with the rotation of the internal combustion engine,
A signal generator that generates a signal in response to the rotation of the rotor, a bracket that holds the signal generator, a fulcrum part that pivots the bracket so that it can rotate eccentrically with respect to the rotor, and the fulcrum. a mounting portion having an adjustment tool support provided in the vicinity of the bracket; and an adjustment hole formed in the bracket to allow the adjustment tool support to face, and the adjustment tool is inserted into the hole and connected to the inner wall of the hole. A signal generating device for an internal combustion engine, characterized in that the bracket is engaged with the adjustment tool support portion to rotationally displace the bracket about the fulcrum portion.