JPH069357Y2 - Propeller shaft damage prevention device for engine dynamometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a propeller shaft damage preventing device for an engine dynamometer, and more specifically, it is connected to a propeller shaft that transmits the output of an engine and the power of the propeller shaft is connected to the propeller shaft. The present invention relates to a propeller shaft bench test apparatus having a dynamometer that absorbs, which prevents damage to each component and damage to equipment that may occur during a test.

(Prior Art) A load test simulator is disclosed in Japanese Utility Model Laid-Open No. 58-63543. In the conventional transmission bench test device that transmits the output of the engine to the propeller shaft and absorbs it with a dynamometer for testing, if the propeller shaft is damaged during the test, there is a problem that the test is stopped or the evaluation is redone. Therefore, we used a limit switch or conducted a test with a stick attached to the limit switch, but in both cases, the eccentricity of the propeller shaft could not be detected accurately, so an emergency stop was not applied and the propeller shaft was damaged. There was something to do.

(Problems to be solved by the invention) As described above, in the conventional propeller schaft bench test equipment, the emergency stop is inaccurate, so the propeller schaft is damaged, causing the parts to scatter and damage the equipment due to the scatter. There was a problem that it occurred. The invention is
The purpose is to solve such problems.

(Means to solve the problem) Approximately on the inner left and right side walls of the propeller shaft cover, respectively.
An eccentricity of the propeller shaft is installed by attaching a reflection type photoelectric switch with a built-in amplifier at a different angle of 90 ° so that the eccentricity of the propeller shaft can be detected by the photoelectric from the photoelectric switch, and by incorporating an emergency stop circuit. The dynamometer is electrically interlocked and stopped when the amount exceeds a certain amount.

(Function) The photoelectric of the reflection type photoelectric switch is passed very close to the outer periphery of the propeller shaft, and when the propeller shaft is swung by a certain amount or more, the photoelectric is blocked to detect the occurrence of shake, and the power is reduced. Control the meter so that it will be stopped in an emergency to prevent damage to each part.

(Embodiment) The drawings show an embodiment of the present invention.

In FIG. 1, 1 is a propeller shaft, 2 is a cover thereof, 3 is a reflection type photoelectric switch having a built-in amplifier, 4 is its photoelectric type, and 5 is a bracket in which the photoelectric switch 3 is attached to a cover 2.

In FIG. 3, 6 is an assembly of an engine and a transmission, 7 is a dynamometer, and in FIG. 5, 8 is a distance between the outer periphery of the propeller shaft 1 and the photoelectric 4.

That is, the dynamometer 7 absorbs the power of the propeller shaft 1 that transmits the output of the engine.
Are linked to. In addition, two reflective photoelectric switches 3
As shown in FIG. 1, FIG. 4 and FIG. There is. The reflective photoelectric switch 3 with a built-in amplifier detects the eccentricity of the propeller shaft 1 by the photoelectric 4 from the photoelectric switch 3, and the dynamometer 7
It is a device that electrically interlocks via the emergency stop circuit shown in the figure.

In the propeller shaft damage preventing device for an engine dynamometer constructed as shown in the figure, first, as shown in FIG. 5, a photoelectric converter 4 is placed near the outer periphery of the propeller shaft 1.
To pass through, for example, the spacing 8 seen in FIG.
Attach each photoelectric switch 3 to the cover 2 so that the allowable amount is 1.5 mm. Even if the propeller shaft 1 rotates and is eccentric, the propeller shaft 1 does not block the photoelectric 4 within the interval 8, but if it exceeds that, the propeller shaft 1 blocks the photoelectric 4, so that the photoelectric switch 3 The amount of eccentricity is detected, and the dynamometer 7 is interlocked and stopped. Therefore, as soon as the allowable amount of eccentricity of the propeller shaft 1 is exceeded, the dynamometer 7 is stopped immediately and damage to each component and damage to the equipment is prevented. Then, as shown in FIG. 6, the operator can know it by the alarm of the buzzer after the interlock.

(Effect of the device) The present invention uses a photoelectric conversion switch with a built-in amplifier to detect the eccentricity of the propeller shaft by photoelectric conversion at approximately 90 ° on the inner left and right side walls of the propeller shaft cover.
When the propeller shaft is shaken by a certain amount or more because it is installed at a different angle, it is possible to detect the occurrence of the shake by blocking the photoelectric, and therefore to detect the excess of the allowable eccentricity of the propeller shaft accurately and instantaneously. In addition, it has an emergency stop circuit that electrically interlocks and stops the dynamometer when the amount of eccentricity of the propeller shaft exceeds a certain amount, so that the dynamometer stops when the propeller shaft is abnormal. However, it is possible to prevent damage to the propeller shaft and each component, and to prevent damage to the equipment due to scattering of components.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of essential parts, FIG. 2 is an explanatory view showing a flow chart of an emergency stop circuit, FIG. 3 is a perspective view of the whole, and FIG. FIG. 5 is an enlarged perspective view of a part of FIG. 3, FIG. 5 is an enlarged front view of a part of FIG. 4, and FIG. 6 is an explanatory diagram of a system when a photoelectric switch is used. 3 ... Propeller shaft, 2 ... Cover, 3 ... Reflective photoelectric switch with built-in amplifier, 4 ... Photoelectric, 7 ... Dynamometer.

Claims (1)

[Scope of utility model registration request] 1. A propeller shaft bench test apparatus having a dynamometer which is connected to a propeller shaft for transmitting an engine output and absorbs power of the propeller shaft, in a right and left side walls of a cover of the propeller shaft. , A reflection type photoelectric switch with a built-in amplifier that detects the eccentricity of the propeller shaft by photoelectrically, and the dynamometer is electrically interlocked when the eccentricity of the propeller shaft exceeds a certain amount. An engine dynamometer propeller shaft breakage prevention device, which is provided with an emergency stop circuit for stopping.