JPH0528357Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an engine rotation speed control device.

2. Description of the Related Art General-purpose engines used to drive generators and other types of work equipment are equipped with a stopper for setting the maximum allowable rotation speed of the engine.

Figures 3 and 4 show an example of such a rotation speed limiting device, in which a regulator handle 2 for operation is attached to the outer end of a shaft 1 on the side of an engine body such as a gearbox. A lever 3, which is also installed on the inner end of the shaft 1, is operatively connected to a governor lever 5 on the speed regulating device side via a regulator spring 4. Regulator handle 2
When the shaft 1 and the lever 3 are rotated, the regulator spring 4 is pulled and the engine speed changes. Rotating the knob 6 to the left will increase the speed, and rotating it in the opposite direction will increase the speed.

A limit stopper 7 made of a bolt that regulates the maximum rotation speed is screwed into the side of the regulator handle 2, and the tip of the stopper 7 protrudes in the middle of the rotation range of the regulator handle 2. ing. A contact portion 8 formed by bending one part of the regulator handle 2 in a direction perpendicular to its rotation direction.
However, when it comes into contact with the tip of the limit stopper 7, rotation of the regulator handle 2 toward the speed increasing side is restricted, and the engine speed is prevented from increasing any further. The limit stopper 7 is used to adjust the maximum rotation speed of the engine at the time of shipment, and once adjusted, the limit stopper 7 is used to prevent the user from performing adjustment operations. is fixed with wire 9 and sealed. That is, if the limit stopper 7 is allowed to be operated freely by the user, there is a risk that the engine will be used at a speed exceeding the permissible number of revolutions, which may cause engine failure.

Problem to be solved by the invention: The maximum rotational speed regulated by the limit stopper 7 is also the operating rotational speed of the engine,
For example, in the case of an engine driving a generator,
For example, set the maximum rotation speed to match the generator.
The rotation speed is set to 2,600 rotations, and when the regulator handle 2 is rotated to the position where it contacts the limit stopper 7, the rotation speed is automatically set to the operating rotation speed. However, this is sufficient when the engine is always used at a constant rotation speed, but when driving multiple work machines with different rotation speeds, for example, the one with the higher rotation speed is set to the limit stopper. 7, if you use it at a lower rotation speed than the other one, set the rotation speed while delicately controlling the regulator handle 2 at a position away from the limit stopper 7. Must.
In addition, even if the same work equipment is used, in the case of a generator, its output is divided into 60Hz and 50Hz regions, and if it is used across both regions, the generator output will be different. It is also necessary to adjust the engine speed each time. In such a case, when using the conventional device at a rotation speed below the maximum rotation speed allowed by the limit stopper 7, it is necessary to delicately adjust the regulator handle 2. It has been impossible for the user to make such adjustments accurately. For this reason, in the past, it was necessary to set up a variety of engines with different maximum rotational speeds according to the requests of the user or the manufacturer of the work equipment using the engine, resulting in a wide variety of engine specifications and the cost of managing them. The drawback was that it was significantly more expensive.

This invention eliminates such conventional drawbacks and allows the user to set the engine speed to multiple speeds even when the engine is used at multiple speeds. It is an object of the present invention to provide a rotation speed limiting device that cannot be rotated to a maximum rotation speed and that can be easily changed at a store or the like.

Means for Solving the Problems In order to achieve the above object, this invention restricts the rotation of the regulator handle in the direction of increasing rotation speed in the middle of the rotation range of the regulator handle. In the rotational speed limiting device provided with a stopper, an adjusting means for changing and adjusting the rotational speed restriction position of the regulator handle by the stopper at a rotational speed lower than the maximum rotational speed allowable for the engine. The regulator handle is equipped with this adjustment means, and the adjusting means is integrally protruded from both ends of the regulator handle in the rotating direction, and is installed upside down and brought into contact with the stopper, thereby adjusting the regulator handle. Adjust the rotation range of the handle in two stages to set the maximum rotation speed to high or low.
It is characterized by being composed of two abutting parts on the left and right that change into stages.

Function To adjust the adjustment means provided on the regulator handle, attach the two contact parts on the left and right sides provided at both ends of the regulator handle in the rotating direction, and attach the regulator handle upside down. This is done by changing. That is, when the regulator handle is mounted facing upward, one of the abutting portions comes into contact with the stopper and the first rotation speed is limited. Further, when the regulator handle is installed face down, the other abutting portion comes into contact with the stopper and a second rotation speed restriction different from the first rotation speed restriction is performed. In this manner, by adjusting the adjustment means consisting of the two left and right abutting portions provided on the regulator handle, the maximum operating speed can be changed within a range that does not exceed the maximum allowable engine speed.

Example Examples of this invention will be described below.

Figures 1 and 2 show the regulator handle 1.
By changing the number 1, the maximum rotation speed during use can be changed to two levels.

That is, the regulator handle 11 has abutment pieces 23 and 24 integrally projected from both ends thereof in the rotation direction. Then, as shown in FIG. 3, from the state in which the contact portion 25 of one of the contact pieces 23 is attached so as to contact the tip of the rotation limiting stopper 17, as shown in FIG.
1 upside down and switching the contact portion 26 at the tip of the other contact piece 24 to contact the tip of the limit stopper 17, the maximum rotational speed can be changed to two stages, high and low. In this case, from the center of rotation of the regulator handle 11 to each contact portion 2
Although the distances L to the extension lines of the contact portions 25 and 26 are equal, the angles α and β formed by the contact portions 25 and 26 with respect to the center line of the regulator handle 11 are set to be different from each other. That is, in the figure, the angle α is set to be smaller than the angle β, so that the contact portion 25 on the angle α side is closer to the contact portion 25 on the other side.
The regulator handle 11 can be rotated to a higher rotation speed than in the case of No. 6.

Effects of the invention As described above, according to this invention, the maximum rotation speed can be changed arbitrarily depending on the work equipment being used by using the adjustment means equipped on the regulator handle. This has the advantage that there is no need to set up a variety of engines with different maximum rotational speed specifications to meet the needs of the machine manufacturer. In addition, there is no need to change the limit stopper that restricts the rotation range of the regulator handle; this limit stopper can be sealed with wire or the like in the same way as before, and use above the allowable rotation speed can be prohibited. .

Furthermore, since the adjustment means consists only of the two abutting parts on the left and right that are integrally protruded from both ends of the regulator handle, there is no need to provide springs or holes with complicated shapes, and the structure is improved. is extremely simple and can be provided at low cost. Also,
Unlike those that simply rotate or slide the lever or support member, etc., the regulator handle must be replaced, so it cannot be changed unless the handle is removed, making it easy for the user to change the regulator handle. There is less risk of an accident by changing to Furthermore, since such changes can be easily made at a retail store, there is an effect that the operation for making the changes is easy.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the regulator handle and rotation control stopper showing an embodiment of this invention, and Fig. 2 is a plan view of the regulator handle installed after being turned over from the state shown in Fig. 1. , FIG. 3 is a plan view of a conventional rotational speed control device, and FIG. 4 is a front view showing the central portion of FIG. 3 in longitudinal section. 11... Regulator handle, 17... Rotation control stopper, 25, 26... Contact portion, 29...
...Adjustment member.

Claims (1)

[Scope of utility model registration request] In a rotational speed control device in which a stopper is provided in the middle of a rotational range of a regulator handle to restrict rotation of the regulator handle in a direction of increasing the rotational speed, rotation of the regulator handle by the stopper is provided. The regulator handle is equipped with an adjusting means for changing and adjusting the number regulation position at a rotational speed lower than the maximum rotational speed permissible for the engine. The two right and left sides are integrally protruded from both ends in the rotation direction, and can be installed upside down to adjust the rotation range of the regulator handle to two levels and change the maximum rotation speed to two levels, high and low. An engine rotation speed control device comprising a contact portion.