JPH0118842Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved structure of a governor advance device that changes the advance of engine ignition timing in response to an increase in engine speed.

Conventionally, there have been devices of this type as shown in FIGS. 1 and 2. In the figure, 1 is a housing of the power distribution device, 2 is a rotating shaft supported by the housing 1 via a bearing 3, and 4 is a stator screwed to the housing 1 via a magnet 5, with magnetic poles on the outer periphery. A portion 4a is formed. 6 is the magnetic pole part 4
a rotor having a magnetic pole part 6a facing a through a predetermined gap, 7 is a cylinder loosely fitted to the rotating shaft 2,
The rotor 6 is fixed. 30 is a resin plate fixed to the housing 1, and the signal coil 3
1. 8 is a governor advance angle device, which is composed of the following parts. That is, 7a is the cylindrical body 7
A governor plate 9 is integrally formed at the tip of the governor plate 7a, a pair of spindles 9 are installed at predetermined positions of the governor plate 7a, 9a is a spring receiving portion thereof, and 10 is loosely fitted to each of the pair of spindles 9. A governor weight 11 is a pair of stopper pins 12 implanted at predetermined positions on the governor plate 7a.
A guide plate is fixed to the tip of the rotating shaft 2 by a bolt 13, and has elongated holes 12a which are stoppers that engage with each of the stopper pins 11. Reference numeral 14 denotes a pair of spring hanging pins attached to predetermined positions of this guide plate 12, 14a is a spring receiving portion thereof, and 15 and 16 are the spring receiving portions 14a.
These are a pair of springs each stretched between the spring receiving portion 9a of the spindle 9 and the spring receiving portion 9a of the spindle 9.

Next, the operation of the above device will be explained. First of all,
When the rotating shaft 2 is rotationally driven by the engine in the direction of arrow A shown in FIG. 2, the centrifugal force acting on the governor weight 10 increases as the rotational speed increases, and the governor weight 10 rotates in the direction of arrow B. and rotates to a position balanced with the rotational torque of springs 15 and 16. As a result, the spindle 9 rotates in the direction of arrow C, and the rotor 6 fixed to the governor plate 7a rotates at an advanced angle with respect to the rotating shaft 2.
As the rotor 6 rotates, the magnetic pole parts 6a and 4a approach each other,
By facing and separating, the amount of magnetic flux interlinking with the signal coil 31 changes, so that an ignition signal voltage with a positive and negative waveform is induced in the signal coil 31.

Due to this advance angle operation, in the conventional device, by changing the force of the springs 15 and 16, the third
Characteristics abc or abd in the figure were obtained. However, reducing exhaust gas and fuel consumption,
Advance angle patterns such as a-be-f have been proposed in response to strict requirements such as increased power performance, but they have the disadvantage that they cannot be realized.

This invention was made in order to eliminate the above-mentioned drawbacks, and by adding a weight pin to the weight,
The present invention provides a device that can obtain a desired advance angle pattern by controlling the rotational force of a weight using a plate. An embodiment of this invention will be described below with reference to the drawings. In FIGS. 4 to 6, 17 is a weight pin fixed to the governor weight 10;
A plate 18 is loosely fitted to the cylindrical body 7 and has a stopper portion 18a and a spring hook portion 18b. 7b
is a hook installed on the governor plate 7a, 1
Reference numerals 9 and 20 are springs stretched between the spring hanging portion 18b and the hook 7b, 18c is a rotation stopper for the plate 18, and 9b is a locking pin installed at the lower end of the spindle 9.

Next, the operation of this invention will be explained. In FIG. 5, when the rotation of the rotating shaft 2 increases to a point a in FIG. 3, the centrifugal force acting on the weight 10 and the force of the springs 15 and 16 balance. As the rotational speed further increases, the centrifugal force of the weight 10 increases, and the angle advances from a to b. weight 10 in b
The weight pin 17 comes into contact with the rotation stopper 18c of the plate 18 as shown in FIG. 6, the advance angle stops, and the characteristic b-e is formed. The rotation further increases, and the centrifugal force of the weight 10 causes the spring 19 to
When the rotational force exceeds 20, the angle advances again and e-f
characteristics are formed.

In the above embodiment, the springs 15, 16, 1
Although springs 9 and 20 have the same specifications, it is also possible to obtain the characteristics shown in FIG. 7 A, B, and C by variously changing the spring specifications.

As described above, according to this invention, a weight pin is installed on the weight, a plate is installed on the cylinder,
By applying rotational torque to the weight pin of the weight, various advance angle modes that cannot be obtained with conventional devices become possible.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional governor device, Fig. 2 is a top view of the one shown in Fig. 1, Fig. 3 is a governor characteristic diagram, and Fig. 4 is a side sectional view showing an embodiment of this invention. 5 and 6 are top views of the one shown in FIG. 4, and FIG. 7 is a governor characteristic diagram. In the figure, 1 is a housing, 2 is a rotating shaft, 7 is a cylinder, 7a is a governor plate, 7b is a hook, 9 is a spindle, 10 is a weight, 12 is a guide plate, 14 is a spring hook pin, 15, 16, 19 ,2
0 is a spring, 17 is a weight pin, and 18 is a plate. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A rotating shaft that is rotationally driven by an engine, a cylinder that is loosely fitted onto this rotating shaft and to which an engine ignition timing determining member is fixed, a governor plate that is integrally formed with this cylinder, and a fixed position on this governor plate. A stopper pin and a spindle, a governor weight having a sliding surface loosely fitted to the spindle, a weight pin planted on the governor weight, a stopper fixed to the rotating shaft and engaged by the stopper pin, and the governor weight. A guide plate formed with a sliding surface and an end surface that comes into contact with the guide plate, a spring hook pin implanted in a predetermined position of the guide plate, a first spring stretched between the spring hook pin and the spindle; A plate that is fitted into the cylindrical body and has a surface that comes into contact with the weight pin, a spring hook installed on this plate, a hook installed on the governor plate, and a second spring stretched between the spring hook and the hook. Governor advance device consisting of.