JPH1010012A - Engine connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To directly measure output torque by providing means for supporting the body of a sample engine in such a manner as to be rockable with the output shaft being centered, making the output shaft independent from the body of the sample engine so as not to add a load to the output shaft, and absorbing low frequency and high frequency generated in the output shaft of the sample engine. SOLUTION: A front rocking frame 11 and a rear rocking frame 12 support the body of a sample engine 101 in such a manner as to be rockable by centering the output shaft. The frames 11, 12 are mounted on a fixed frame 10 with a rubber bush 15 between by a pin 16, and the bush 15 absorbs low frequency component of oscillations resulted from the combustion cycle of the engine 101. A spline shaft 17 is supported by a rotating bearing 18, and mounted on the output shaft 101a of the engine 101. The torque generated from the engine 101 is damped by a rubber coupling 19, and the reaction by the torque in accelerating or decelerating operation is also absorbed and reduced by the bush 15 and the pin 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine connecting device for connecting a test engine to a transmission shaft system including a shaft torque detector.

[0002]

2. Description of the Related Art FIG. 2 is a diagram showing a conventional example of an engine torque detecting device. In the torque detection device shown in FIG. 2A, a test engine 101 is an engine to be tested, and a transmission 1
02. Transmission 102
The output shaft 103 is for reducing the generated rotation of the engine, and is connected to a shaft torque detector 108 via a universal joint 105 for transmitting power. The shaft torque detector 108 is for detecting a torque acting on the connected transmission shaft system, and the other end is connected to the absorption dynamometer 108.

In the torque detecting device shown in FIG. 2B, an output shaft 103 is connected to a transmission shaft supported by bearings 107 via a chain 104 for transmitting power at a reduced speed.

[0004]

The above-described conventional torque detecting device detects torque in a state where the transmission 102, the chain 104, and the like are attached to the test engine 101, so that the efficiency of the transmission 102 and the like depends on the efficiency. It was not possible to detect the torque characteristic of only the test engine 101 that was not performed.

However, if such a torque detecting device is directly connected to the crankshaft of the test engine 101,
Since the torque fluctuation due to the combustion cycle is large, there is a possibility that the device may be damaged by an excessive force.

An object of the present invention is to provide an engine connecting device which solves the above-mentioned conflicting problems and enables the output torque of a test engine to be directly measured.

[0007]

In order to solve the above-mentioned problems, the present invention is directed to an engine connection for connecting an output shaft of a test engine to a transmission shaft system including a shaft torque detector and an absorption dynamometer. An apparatus, wherein the main body of the test engine is centered on an output shaft and is supported in a swingable manner, and the main body of the test engine is generated in the main body of the test engine based on the operation of the test engine. Low-frequency absorbing means for absorbing low-frequency vibrations, independently of the main body of the test engine, shaft support means for supporting the output shaft of the test engine so that no load is applied to the output shaft, High frequency absorbing means for absorbing high frequency vibration generated on the output shaft of the test engine based on the operation of the test engine.

[0008]

Embodiments of the present invention will be described below in more detail with reference to the drawings. FIG.
1 is a diagram showing an embodiment of an engine connection device according to the present invention. Note that the same reference numerals are given to portions that perform the same functions as those of the above-described conventional example, and redundant description will be omitted as appropriate. The front swing frame 11 and the rear swing frame 12
This is for centering the output shaft of the test engine 101 and for swingably supporting it (main body support means). The front oscillating frame 11 is mounted on the test engine 1 with the shaft center accurately positioned by the spigot portion A.
01 is attached. The engine 101 splits the crankcase into two parts and connects them with metal
Since the insert part A is machined accurately,
This portion is connected to the front and rear swing frames 11, 12 and the engine 10
It is used as a machining reference plane for one shaft center.

Similarly, the front swing frame 11 is attached to the rear swing frame 9 in a state where the shaft center is accurately positioned by the spigot portion B. The front and rear swing frames 11 and 12 are integrally fixed to the test engine 101 by fixing bolts 13. When the engine is mounted, the fixing bolts 13 are securely fixed at the positions and the number of positions actually used.

The front and rear swing frames 11 and 12 are supported by a fixed frame 10 via swing bearings 14. Further, the front swing frame 11 and the rear swing frame 12
Is attached to the fixed frame 10 by a pin 16 with a rubber bush 15 interposed therebetween. Rubber bush 1
Numeral 5 is for absorbing low-frequency components of shock fluctuation torque caused by the combustion cycle of the test engine 101 and vibration generated by reaction force due to torque during acceleration / deceleration operation (low-frequency absorbing means). ).

The spline shaft 17 is supported by a rotary bearing 18 and is attached to an output shaft 101a of the engine 101 under test. Spline shaft 1
7. The rotary bearing 18 is for supporting the output shaft 101a independently of the main body of the test engine 101 so that a load is not applied to the output shaft 101a (shaft support means). The spline shaft 17 is attached to one end of a torque detector 108 via a rubber coupling 19.

The rubber coupling 19 is used for the test engine 1
01, which absorbs high-frequency components (high-order components of vibrations in the explosion process) out of vibrations generated by the impact fluctuation torque caused by the combustion cycle of No. 01 (high-frequency absorption means), such as synthetic rubber and polyurethane. The elastic body 19a is connected by a flange 19b having a claw portion. This rubber coupling 19 is connected to a torque detector 108.
Are provided on the other end side, but either one may be provided.

The shear pin unit 20 is used to break a thin pin and cut off power when a torque greater than a predetermined value is applied to a transmission shaft system to which the torque detector 108 is attached. Then, the torque detector 10
8 and the other rubber coupling 19.

Since the engine connection device of this embodiment is configured as described above, the power generated by the test engine 101 is the output shaft 101a, the spline shaft 17, the rubber coupling 19, the torque detector 108, the shear pin The unit 20 and the rubber coupling 19 are transmitted in this order,
It is absorbed by the absorption dynamometer 109.

At this time, the fluctuation torque generated by the test engine 101 is buffered by the rubber coupling 19 attached before and after the torque detector 108. Further, the reaction force due to the torque during the acceleration / deceleration operation is slightly swung by the front and rear swing frames 11, 12 and the swing bearing 14, and further absorbed and reduced by the rubber bush 15 and the pin 16.

As described above, according to the present embodiment, the test engine 101 is connected to the transmission 102 and the chain 1
04 without any intervening mechanism (coaxial direct connection)
Driving becomes possible, and the generated power of the engine can be directly measured. Also, the transmission 10
Since the connection can be made without the intermediary of the two or the like, the structure of the torque detecting device becomes compact as a result.

Further, the test engine 101 is swingably fixed to the fixed frame 10 (swing frame mechanism), and the power shaft system is provided with the shear pin unit 20, so that an instantaneous load or engine damage may occur. In addition, even when the output shaft is fixed, it is possible to prevent the mechanical device from being damaged.

Various modifications and changes are possible without being limited to the above-described embodiments, and these are also within the equivalent scope of the present invention. For example, the low-frequency absorbing means is not limited to the rubber bush, and the swing frame may be connected to the fixed part by a damper or the like.

[0019]

As described in detail above, according to the present invention, the test engine is supported swingably, and the output shaft is supported independently of the main body, and is generated by the operation of the test engine. Since the vibration is connected so as to absorb the low frequency component and the high frequency component separately, the torque of the test engine can be directly measured with high accuracy.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an engine connection device according to the present invention.

FIG. 2 is a diagram showing a conventional example of an engine torque detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fixed frame 11 Front swing frame 12 Rear swing frame 13 Bolt 14 Swing bearing 15 Rubber bush 16 Pin 17 Spline shaft 18 Rotation bearing 19 Rubber coupling 20 Sharpin unit 101 Test engine 108 Torque detector 109 Absorption dynamometer

Claims (1)

[Claims] An engine connecting device for connecting an output shaft of a test engine to a transmission shaft system including a shaft torque detector and an absorption dynamometer, wherein the main body of the test engine is centered on the output shaft. A main body supporting means for swingably supporting the main body of the test engine; a low frequency absorbing means for absorbing low frequency vibration generated in the main body of the test engine based on the operation of the test engine; Independently, a shaft supporting means for supporting the output shaft of the test engine so that a load is not applied to the output shaft, and an output shaft generated on the output shaft of the test engine based on the operation of the test engine. And a high frequency absorbing means for absorbing high frequency vibration.