JPH0138307Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an engine starting device used when performing various tests by igniting an assembled engine. To provide a starting device that can smoothly and reliably fit the driven parts of an engine and a driven part to start the engine well even if there is some misalignment between the driven parts.

Hereinafter, one embodiment of the present invention will be explained based on the attached illustrative drawings. In FIG. 1, 1 is a starting device 2.
It is a movable table on which a slide guide rod 4 is mounted, and is supported on a fixed table 3 via a slide guide rod 4 so as to be able to move back and forth, and is driven to reciprocate in the length direction of the guide rod 4 by a cylinder/piston unit 5. . A stopper 6 defines the forward limit position of the movable base 1 and is provided on the fixed base 3.

The starting device 2 is composed of a hydraulic motor 7 as a driving means, an electromagnetic clutch 8, a driving rotating body 9, a Paumann coupling 10 as a cylindrical flexible rotating shaft joint, and a driving shaft 11. . As shown in FIG.
2 and a driving rotating body 9 loosely fitted to the transmission cylinder shaft 12 via a bearing 13, and the Baumann coupling 10 has a connecting flange 10a on the transmission side that is connected to the driving rotating body 9. It is concentrically connected to the end of the rotating body 9 by a bolt/nut 14.
The drive shaft 11 has a spline shaft portion 11 at its tip.
A connecting flange 15 fixed at an intermediate position thereof is concentrically connected to the passive side connecting flange 10b of the Baumann coupler 10 by bolts and nuts (not shown). The inner end 11b of the drive shaft 11 is loosely fitted into the Baumann coupling 10, and the drive shaft inner end 11b
A ball joint 16 is interposed between the transmission side connection flange 10a of the Baumann coupling spring 10 and the transmission side connection flange 10a of the Baumann coupling spring 10. This ball joint 16 is connected to the inner end portion 11 of the drive shaft.
a spherical male body 16b equipped with a threaded portion 16a that is screwed into the spherical male body 16b, a female body 16c that is loosely fitted to the spherical male body 16b so as to be relatively rotatable, a shaft 16d that is screwed to the female body 16c, and this shaft 16d. The shaft 16d passes through a flanged rubber bushing 17 that is fitted into the central through hole of the transmission side connection flange 10a of the Baumann coupling 10, and the nut 16e is inserted into the rubber bushing 17. It is in contact with the inner end flange. Note that if this nut 16e is tightened too much, it will destroy the flexibility of the Baumann coupling 10, so the nut 16e must be tightened to the extent that appropriate flexibility can be ensured.

Once the engine 18 to be tested is set in position, the flywheel 1 of the engine 18 is
The transmission connecting spline shaft hole 21 of the clutch 20 mounted on the clutch 9 and the drive shaft 11 of the starter 2 face each other in a substantially concentric state as shown in FIG. On the other hand, the electromagnetic clutch 8 of the starter 2 is energized to a transmission state, and the hydraulic motor 7 is operated at a low speed to rotate the drive shaft 11 at a low speed. In such a state, when the movable base 1 on which the starter 2 is mounted is moved forward by the cylinder/piston unit 5 to the forward limit position regulated by the stopper 6, the starter 2 is moved forward as shown by the imaginary line in FIG. While the end spline shaft portion 11a of the drive shaft 11 rotates at a low speed, the spline shaft hole 2 of the clutch 20 rotates at a low speed.
Fits into 1. Thereafter, by operating the hydraulic motor 7 at a predetermined starting speed, the rotational force is applied to the cylinder shaft 12, the electromagnetic clutch 8, the drive rotating body 9, the Baumann coupling 10, the drive shaft 11, and the spline shaft. 11a and the spline shaft hole 21 to the engine flywheel 19, and the engine 18 is started.

During the above-mentioned starting operation, if there is misalignment between the spline shaft hole 21 on the engine side and the drive shaft 11, move the spline shaft portion 11a at the tip of the drive shaft toward the spline shaft hole 21 by moving the movable base 1 forward. By pressing it to the side, the drive shaft 11 moves eccentrically with the bending of the Baumann coupler 10, thereby causing the spline shaft portion 11 at the tip of the drive shaft to move eccentrically.
a will fit into the spline shaft hole 21.
At this time, the spherical male body 16b and the female body 1 of the ball joint 16
6c, and the shaft 16d swings within the rubber bush 17. In this way, drive shaft 1
Even if the Baumann coupler 10 is slightly eccentric with respect to the drive rotor 9 due to the bending of the Baumann coupler 10, the rotational force is transmitted from the drive rotor 9 to the drive shaft 11 without any problem due to the Baumann coupler 10. It will be done.

After the engine is started, or after a test run is completed with engine torque being absorbed by the hydraulic motor 7, the movable base 1 is moved backward by the cylinder/piston unit 5 to the backward limit position, and the tip of the drive shaft 11 is moved backward. The spline shaft portion 11a is removed from the spline shaft hole 21 on the engine side, and at this time, the axial tensile force is transmitted from the drive rotating body 9 to the drive shaft 11 by connecting the Baumann coupling 10 to the transmission side. This is done from the flange 10a via the ball joint 16, and the drive shaft 11 is directly pulled without using the elasticity of the Baumann coupling 10.

Incidentally, the rubber bush 17 may be omitted. Of course, in this case, the through hole of the connecting flange 10a must be a hole that is offset from the shaft 16d.
Further, if there is sufficient axial length within the Baumann coupler 10, the passive shaft and the transmission side of the Baumann coupler 10 can be connected in the axial direction via two ball joints 16. In this case, drive shaft 1
1 can be easily translated in parallel over a relatively wide range.

In the above embodiment, the Baumann coupling 10 was used as the cylindrical flexible rotary shaft joint, and the ball joint 16 was used as the universal joint, but the invention is not limited to these, and other cylindrical rotary shaft joints may be used. and ball joint 1
It is also possible to use a universal joint instead of 6. Furthermore, although the hydraulic motor 7 is used as a driving means, for example, an electric motor may also be used.

The starting device of the present invention can be implemented as described above, and includes a driving rotating body rotated by a driving means, a driving shaft equipped with a splined shaft portion that can be fitted into a splined hole on the engine side. are concentrically connected to each other via a cylindrical flexible rotary shaft joint, and further between the transmission side and the passive side of the rotary shaft joint, allowing for the bending of the rotary shaft joint, but with no tension in the axial direction. Since the universal joint for transmitting force is inserted through the rotary shaft joint, as explained in the embodiment, the spline hole on the engine side and the spline shaft on the drive shaft side are connected to each other. Even if there is some misalignment between the spline shaft and the spline hole, the flexure of the flexible rotary shaft joint can be used to smoothly and reliably fit the spline shaft into the spline hole, and the engine can be started. It can be done well. Moreover, when the spline shaft portion is removed from the spline hole on the engine side, the axial tensile force is transmitted to the drive shaft via the tensile force transmission universal joint passing through the flexible rotary shaft joint, and the The above-mentioned separation can be strongly and reliably performed without applying an unreasonable tensile force to the rotary shaft joint. Therefore, the life of the flexible rotating shaft joint can be extended for a long time.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of the whole, and FIG. 2 is a partially longitudinal side view of the main part. DESCRIPTION OF SYMBOLS 1...Movable base, 2...Starting device, 7...Hydraulic motor (driving means), 8...Electromagnetic clutch, 9...
...Rotating body for drive, 10...Baumann coupling (cylindrical flexible rotary shaft joint), 11...Drive shaft, 1
1a... Spline shaft portion, 16... Ball joint (universal joint), 18... Engine, 19... Flywheel, 21... Spline shaft hole.

Claims (1)

[Scope of utility model registration request] A drive rotating body rotated by a drive means and a drive shaft having a spline shaft portion that can be fitted into a spline hole on the engine side are connected concentrically to each other via a cylindrical flexible rotary shaft joint. A universal joint is connected between the transmission side and the passive side of the rotary shaft joint and passes through the inside of the rotary shaft joint to allow deflection of the rotary shaft joint but transmit axial tensile force. A starting device for engine testing consisting of a