JP2002116115A - Positioning device and method for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method capable of quickly, easily and accurately positioning engine. SOLUTION: This positioning device provided with a base part to be installed on a surface plate and an installing part for receiving the engine, is provided with a height adjusting mechanism movable in the height direction of the installing part related to the base part, a first horizontal direction adjusting mechanism movable in the first horizontal direction of the installing part related to the base part and a second horizontal direction adjusting mechanism movable in the second horizontal direction of the installing part related to the base part between the base part and the installing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bench testing of engines, and more particularly, to an apparatus and method for positioning a testing engine with respect to a measuring dynamometer.

[0002]

2. Description of the Related Art A bench test of an engine is performed by operating the engine with the shaft of the engine connected to the shaft of a dynamometer. Is to evaluate the performance. To perform the bench test, the engine must be fixed on the surface plate using two to four dedicated jacks, and the engine shaft must be connected to the dynamometer shaft via the propeller shaft. is necessary.

If the axis of the engine and the axis of the dynamometer are misaligned, torsional vibration and torque fluctuation occur in the propeller shaft connected between them, and the result of the performance measurement test becomes inaccurate. In addition, there is a risk of damaging the engine and the propeller shaft. Therefore, it is important to accurately align the axis of the engine with the axis of the dynamometer.

[0004] For this reason, conventionally, the engine is fixed on the surface plate using two to four dedicated jacks that can be adjusted only in the height direction, and then the dynamometer and the rotational axis of the engine are arranged using a centering string. While monitoring, once loosening the binding means, hit the jack legs with a hammer to move the jack horizontally, and then tighten the binding means again, adjust the displacement of the horizontal position of the engine shaft, The method of adjusting the height using the adjustment screw of the jack while looking at the level on the propeller shaft was adopted.

[0005]

However, in the method of adjusting by hitting with a hammer, there is a possibility that the position is rather deteriorated. May fluctuate,
To obtain the accuracy required for the test was not easy but required skill. In addition, even if skilled technology was used, the engine was quite heavy, and the work was inevitably time-consuming and not convenient. In addition, with the recent high performance of engines, the required measurement accuracy has been increased, and as a result, the required alignment accuracy of the shaft center has also been increased. Achieving accuracy is becoming increasingly time consuming and difficult.

[0006] In view of the above problems, an object of the present invention is to provide an apparatus and a method capable of quickly and easily accurately positioning an engine.

[0007]

According to the first aspect of the present invention,
Height direction by adjusting the adjustment part of each adjustment mechanism,
Horizontal positioning can be performed, which allows quick and easy accurate positioning of the engine.

According to the second aspect of the present invention, the mounting portion can be positioned in the rotational direction in the horizontal plane.
The engine can be received in the mounting part with a higher degree of freedom.

According to the third aspect of the present invention, the engine can be rotatably mounted on the mounting portion, whereby the mounting portion of the engine and the mounting portion at an arbitrary angle can be adjusted, and the engine can be mounted with a higher degree of freedom. Can be received by the mounting portion.

[0010] The means described in claim 4 is the first invention.
The third device is changed to a method, and the effect is substantially the same as that of the first to third devices.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of the jack of the present invention. 1 indicates the jack as a whole. The jack 1 includes a base 2 attached to the base 9, a height adjustment mechanism connected to the base 2 movably in a height direction with respect to the base 2, and an angle direction adjustment mechanism rotatable in a horizontal plane with respect to the height adjustment mechanism. A horizontal adjustment mechanism movable in the horizontal direction with respect to the angle adjustment mechanism, and a mounting portion 6 rotatable in a vertical plane with respect to the horizontal adjustment mechanism to mount the engine 24. By adjusting each of the height adjustment mechanism, the angle direction adjustment mechanism, the horizontal direction adjustment mechanism, and the rotation mechanism of the mounting section 6, the jack 1 can adjust the mounting section 6.
Can be adjusted to any position and orientation.

The respective adjusting mechanisms will be described below. First, the height adjusting mechanism will be described with reference to FIGS. The height adjusting mechanism mainly includes the base 2 and the screw 10. A flange 13 is formed at the bottom of the base 2. A hole (not shown) for fixing the base 2 to the base 9 using a jig is formed in the flange portion 13. The base 2 is hollow and the screw 10
Are guided by a part of the inner surface of the base 2 so as to be movable in the height direction. The upper limit of the movement of the screw 10 is
This is realized by the projection 10 a provided at the lower end of the base 2 engaging with the inner upper surface of the base 2. On the other hand, the lower limit of the movement of the screw 10 is as follows.
Is realized by engaging with the upper surface of. The worm wheel 15 is rotatably supported by the base 2 at its outer periphery via bearings 12a and 12b. A female thread is threaded inside the worm wheel 15,
The outer peripheral portion of the screw 10 is engaged with a male screw portion. Further, on the outer periphery of the worm wheel 15, the worm 14
And is rotatably supported by the base 2 in a state of engagement.

In the case of height adjustment, when the shaft 16 connected to the worm 14 in FIG. 2 is rotated clockwise, the worm wheel 15 rotates counterclockwise as viewed from above in FIG. , The screw 10, that is, the mounting portion 6 can be moved upward. Of course, when the shaft 16 is rotated counterclockwise, the mounting portion 6 can be moved downward. When the worm 1 is fixed in the height direction, the worm 1 is fixed to the worm 1 with a known appropriate fixing device (not shown).
By fixing 4, worm wheel 15, that is, screw 10, can be fixed to base 2.

The rotation direction adjusting mechanism will be described. The rotation direction adjusting mechanism mainly includes the rotation stage 3 and the screw 10. The rotating stage 3 has a bottom portion supported so as to be compatible with an upper portion of the screw 10, and is connected so that the rotating stage 3 and the screw 10 can relatively rotate 360 °. Also, rotating stage 3
Is fixed to a claw 17 that is movable in the radial direction of the screw 10, while a claw engaging portion is formed on the entire outer periphery of the upper portion of the screw 10.

When fixing in the rotation direction, the claw 1
The rotary stage 3 can be fixed at an arbitrary relative angle with respect to the screw 10 by moving the screw 7 radially inward and fitting the screw 7 into the screw 10 engaging portion.

Next, the horizontal adjustment mechanism will be described.
The horizontal adjustment mechanism includes a horizontal X-direction adjustment mechanism,
And an adjustment mechanism in the Y direction in the horizontal direction different from the X direction. First, the X-direction adjusting mechanism will be described. X
The direction adjusting mechanism mainly includes an X stage 4 and a rotating stage 3. The X stage 4 is supported on the upper surface of the rotary stage 3. At the lower part of the X stage 4, there is provided a hole in which a female screw portion extending in the X direction is formed.
The female thread is provided with a shaft 18 having a male thread.
Are engaged. The shaft 18 is rotatably received in an opening formed in a tab 19 extending from both ends of the rotary stage 3. Thus, the shaft 1
8 and the X stage 4 form a ball screw type feed mechanism.

When adjusting in the X direction, when the shaft 18 is rotated clockwise as viewed from the left in FIG. 2, the X stage 4 can be moved to the right with respect to the rotary stage 3. Conversely, when the shaft 18 is rotated counterclockwise, it can be moved to the left. When fixing in the X direction, the X stage 4 can be fixed with respect to the rotary stage 3 by fixing the shaft 18 by an appropriate method.

Next, the adjustment mechanism in the Y direction will be described.
The Y direction adjusting mechanism mainly includes a Y stage 5 and an X stage 4. The concave portion formed at the lower portion of the Y stage 5 is fitted with the convex portion formed at the upper portion of the X stage 4,
Due to such fitting, the Y stage 5 is
The stage 4 is accurately guided in the Y direction. The upper part of the X stage 4 is provided with a hole formed with a female thread extending in the Y direction, and the shaft 12 having the male thread is engaged with the female thread. The shaft 21 is provided with tabs 1 extending from both ends of the X stage 4.
9 is rotatably received in the opening formed therein. Thus, the shaft 21 and the Y stage 5 form a ball screw type feeding mechanism.

In the case of adjustment in the Y direction, by rotating the shaft 21 clockwise in FIG. 2, the Y stage 5 moves away from the X stage 4 perpendicularly to the paper surface. Conversely, by rotating the shaft 21 in a counterclockwise direction, the Y stage 5 approaches the front side perpendicularly to the paper surface.
When fixing in the Y direction, the screw stage 20 is screwed into a screw hole provided in the Y stage 5 so that the X stage 4 and the Y stage 5 are tightened at the fitting portion. The height adjustment mechanism and the horizontal adjustment mechanism described above can freely select the adjustment amount of the knob by appropriately selecting the screw pitch of the feed mechanism. Of course, by choosing a small pitch, fine adjustments, for example, less than 0.1 mm, can be made. Optionally, to make positioning easier
Scales may be provided for these adjustment mechanisms.

Next, the mounting section 6 will be described. Mounting part 6
Is formed with a hole for receiving a mounting portion (not shown) on the engine 24 side. The mounting section 6 is connected to the Y stage 5 so as to be movable in a vertical plane. When fixing the mounting portion 6, the mounting portion 6 is tightened to the Y stage 5 by rotating the nut 22 toward the screw head 23.

Of course, the mounting portion 6 may have various shapes depending on the shape of the mounting portion of the engine 24 in addition to the mounting portion 6 shown in this embodiment. Also, the arrangement of the adjusting mechanism between the mounting portion 6 and the base 2 is not limited to the arrangement shown in the embodiment, but an arbitrary arrangement provides the same effect as the embodiment. The X and Y directions of the horizontal adjustment mechanism are preferably perpendicular to each other.

Next, the jack 1 of the present invention described above.
A method of fixing the engine 24 on the surface plate 9 using the method will be described with reference to FIGS. First, Engine 2
After roughly adjusting the height of the height adjusting mechanism of the jack 1 corresponding to each of the mounting portions 4, the angle of the rotation direction adjusting mechanism, and the direction of the mounting portion 6, the mounting portion 6 of the jack 1 is mounted on the engine 24. Then, the base 2 of the jack 1 is fixed on the surface plate 9 using a jig.

Next, the propeller shaft 8 is connected to the shaft 26 of the engine 24 and the shaft 25 of the dynamometer 2, and a level is installed on the upper surface of the propeller shaft 8. The propeller shaft 8 is horizontal, that is, the shaft 2 of the engine 24 is
The height adjuster of each jack 1 is adjusted while looking at this level so that the height of the axis 6 is equal to the height of the axis 25 of the dynamometer 2. When the level of the propeller shaft 8 is confirmed with a level, the worm 14 is fixed and the screw 10
The height adjustment is completed by fixing.

Next, using the dial gauge, the engine 2
To adjust the height of the axis 26 of the shaft 4 and the height of the shaft 25 of the dynamometer 2, the adjustment units of the X-direction adjustment mechanism and the Y-direction adjustment mechanism are adjusted. When the amount of deviation between the axis of the shaft 25 of the dynamometer 2 and the axis of the shaft 26 of the engine 24 becomes smaller than a predetermined amount by the dial gauge, the adjusting portions (shafts) of both adjusting mechanisms are fixed. Thus, the positioning of the engine is completed.

As described above, accurate positioning of the engine can be easily and quickly performed by using the jack having the horizontal adjustment mechanism. Another advantage is that there is no need to loosen the fastening means as in the prior art, so there is no danger of dropping the engine, etc., and it is possible to make adjustments safely. It is unnecessary.

[Brief description of the drawings]

FIG. 1 is a side view of a jack of the present invention.

FIG. 2 is a partial cross-sectional side view of the jack of the present invention.

FIG. 3 is a perspective view showing a state where an engine is mounted on a surface plate.

FIG. 4 is a side view showing a state where the engine is mounted on a surface plate.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 positioning device 2 base 3 rotating stage 4 X stage 5 Y stage 6 mounting part 9 surface plate 24 engine

Claims (4)

[Claims] 1. A positioning device comprising: a base for mounting to a surface plate; and a mounting part for receiving an engine, a height adjusting mechanism capable of moving the mounting part in a height direction with respect to the base. A first horizontal adjustment mechanism capable of moving the mounting portion in the first horizontal direction with respect to the base; and a second horizontal adjustment mechanism capable of moving the mounting portion in the second horizontal direction with respect to the base. A positioning device provided between the base and the mounting portion. 2. The positioning device according to claim 1, further comprising a rotation adjusting mechanism capable of rotating the mounting portion in a horizontal plane between the base portion and the mounting portion. 3. The positioning device according to claim 1, wherein the mounting portion is rotatably connected in a vertical plane. 4. A step of mounting an engine on the mounting portion of the positioning device according to claim 1, and fixing the engine to the surface plate by fixing the base portion to the surface plate. And a step of adjusting the position of the engine by adjusting each of the adjusting mechanisms.