JPH0522848Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a starter device for starting an engine in a dynamometer for engine performance testing.

B Summary of Disclosure In the dynamometer for engine performance testing,
A first timing pulley is attached to the coupling ring of the dynamometer, while an induction motor is provided as a starter motor, a second timing pulley is attached to this, and a third timing pulley is further arranged to be movable up and down by a fluid pressure cylinder, A double-sided timing belt is wound between the second and third timing pulleys, and by moving the third timing pulley up and down, the double-sided timing belt is pressed against and engaged with the first timing pulley.

C. PRIOR TECHNOLOGY Eddy current electric dynamometers (which are a fraction of the price of direct current dynamometers) are used as dynamometers for engine testing, which have good accuracy in torque and rotational speed and are inexpensive. ing. The prototype engine does not have a starter, so it must be started using a dynamometer, but the eddy current electric dynamometer itself does not have the ability to drive the engine. Therefore, conventionally, a starter device is added as shown in FIGS. 5 to 8. Here, what is shown in FIGS. 5 and 6 is one in which an eddy current type electric dynamometer 1 is connected to an intermediate shaft 2, and ring gears 3 and 4 provided on this intermediate shaft 2 are engaged with starter motors 5 and 6, respectively. It is.

On the other hand, in the case shown in FIGS. 7 and 8, an eddy current type electric dynamometer 1 is connected to a pulley 8 via an electromagnetic clutch 7.
A belt 10 is wound around the pulley 8 and the induction motor 9.

D. Problems to be Solved by the Invention However, in the system shown in FIGS. 5 and 6, the starter motors 5 and 6 can only rotate in one direction, so two starter motors are required to rotate in both directions. Furthermore, since the starter motor is a commercially available product, its output is limited, and it requires a DC power source, making maintenance difficult. Furthermore, ring gears 3 and 4
It was difficult to handle high speeds (10,000 rpm) due to centrifugal force, etc., and maintenance was required to prevent the lubricating oil on the intermediate shaft 2 from splattering, resulting in poor durability.

On the other hand, the ones shown in FIGS. 7 and 8 require space in the length direction and must be provided with an electromagnetic crank 7 for high speed. Furthermore, an intermediate bearing stand was required, and only one shaft could be used.

The object of the present invention is to provide a starter device that solves the problems of the prior art described above.

E Means and actions for solving problems In the dynamometer for engine performance testing,
A first timing pulley is attached to the coupling ring of the dynamometer, while an induction motor is provided as a starter motor, a second timing pulley is attached to this, and a third timing pulley is further arranged to be movable up and down by a fluid pressure cylinder, A double-sided timing belt is wound between the second and third timing pulleys, and by moving the third timing pulley up and down, the double-sided timing belt is pressed against and engaged with the first timing pulley.

F. Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 4. As shown in the figure, the first timing pulley 12 is attached to the H flange 11 of the eddy current type electric dynamometer 1, but the intermediate shaft is not connected. Therefore, oil lubrication of the intermediate shaft is not required, the surrounding area is not contaminated, and an intermediate bearing stand is not required, so that space in the length direction can be reduced.

On the other hand, the induction motor 1 is used as a starter motor.
3 is provided, and a second timing pulley 14 is attached to the rotating shaft, and a rolling ball bearing 1 is provided.
One end of the support rod 16 is rotatably supported via the support rod 5. Since the induction motor 13 can be rotated in forward and reverse directions, it is not necessary to provide two motors, unlike a starter motor, and a commercial power supply is sufficient as a direct current power supply is not required. Furthermore, its capacity can be easily changed.

The other end of the support rod 16 is supported by the upper end of an upright air cylinder 17 via a long hole.
A third timing pulley 18 is rotatably supported near the other end of the support rod 16 via a rolling ball bearing.
A double-sided timing belt 19 is wound between 4 and 18. This double-sided timing belt 1
9 has not only an uneven inner circumferential surface as shown in FIG. 4, but also an outer circumferential surface. Therefore, the air cylinder 17 is contracted and the third
By lowering the timing pulley 18,
The double-sided timing belt 19 is pressed against the first timing pulley 12 and engaged. In this state, when the second and third timing pulleys 14 and 18 are rotated by the induction motor 13 to cause the timing belt 19 to run, the rotation is transmitted to the first timing pulley 12 through meshing. The only load on the shaft end is the pulley.
High speed rotation of 1000rpm is possible. Further, the tension of the timing belt 19 can be freely adjusted by expanding and contracting the air cylinder 17.

In this way, in the present invention, the third timing pulley 18 can be moved up and down by the air cylinder 17 to connect and disconnect the rotation. In this case, management of gap clearance, etc. is eliminated. Note that when the engine starts and reaches high speed rotation, the timing belt 19 may be separated from the first timing pulley 12 by extending the air cylinder 17 and raising the timing belt 19.

In the above embodiment, an eddy current electric dynamometer is used as an example, but the present invention is not limited to this, and other dynamometers may be used.

G. Effects of the Invention As described above in detail based on the embodiments, the present invention is a starter device that is capable of forward and reverse operation and has a simple configuration, and both shafts of the dynamometer can be used.

[Brief explanation of drawings]

1 to 4 relate to an embodiment of the present invention, in which FIG. 1 is a front view showing when the starter is stopped, FIG. 2 is a front view showing when the starter is driven, and FIG. 4 is a front view of a double-sided timing belt, 5 is an explanatory diagram of a conventional starter device using a starter motor, and 6 is a diagram of the part in 5 -
Fig. 7 is an explanatory diagram of a conventional starter device using an electromagnetic clutch, and Fig. 8 is a - in Fig. 7.
It is a line arrow view. In the drawing, 1 is an eddy current electric dynamometer, 12 is a first
Timing pulley, 13 is an induction motor, 14 is a second timing pulley, 16 is a support rod, 17 is an air cylinder, 18 is a third timing pulley, 1
9 is a double-sided timing belt.

Claims (1)

[Scope of utility model registration request] In a dynamometer for engine performance testing,
A first timing pulley is attached to the coupling ring of the dynamometer, while an induction motor is provided as a starter motor, a second timing pulley is attached to this, and a third timing pulley is further arranged to be movable up and down by a fluid pressure cylinder, A starter characterized in that a double-sided timing belt is wound between the second and third timing pulleys, and by moving the third timing pulley up and down, the double-sided timing belt is pressed against and engaged with the first timing pulley. Device.