JP2950002B2 - Power transmission device in internal combustion engine test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for interlocking an output shaft of a test device and a main shaft of an internal combustion engine when performing a performance test of the internal combustion engine, for example.

[0002]

2. Description of the Related Art Conventionally, as this type of device, a power transmission device in an internal combustion engine test device disclosed in Japanese Patent Publication No. 2-13731 has been provided. That is, in this conventional configuration, a disk rotatable around the axis of the output shaft is interlockedly connected to the output shaft in the front-rear direction interlocked with the motor via a plurality of elastic connecting members, and the motor is connected to the base frame. A driving device is provided between the motor and the base frame so as to be able to move back and forth, and to perform the movement back and forth.

By operating the driving device, the disk is configured to be able to approach and separate from a ring gear attached to the main shaft of the internal combustion engine, and is brought close to the center of the disk by approaching the ring gear to the main shaft. A front-rear shaft to be internally fitted is attached, and a sliding body capable of contacting the end face of the main shaft is externally fitted to the front-rear shaft, and an elastic body is provided to urge the sliding body in the contact direction. .

Further, a swinging rod which can swing back and forth is attached to the front side of the disk via a horizontal pin in the horizontal direction, and the inner end of the rocking rod and the sliding body side are connected to the horizontal pin. Relatively slidably connected via parallel connecting pins, and located at the outer end of the ring gear when an outer end of the oscillating rod is brought into contact with a sliding body against an end face of a main shaft by approaching movement of the disc. Further, an engaging portion is provided which can be engaged with the ring gear by forward swinging of the swinging rod by sliding of the sliding body against the elastic body.

According to this conventional configuration, in a state where the ring gear is opposed to the disk, the sliding body moves forward by the elastic force of the elastic body, the connecting pin is positioned forward of the horizontal pin, and the swinging rod is moved. The engaging portion is swung around the horizontal pin so as to be located at the upper rear side. In this state, when the disk is moved closer to the ring gear side via a motor or the like by the operation of the driving device, first, the tip of the slide comes into contact with the end face of the main shaft and stops.
After that, the disk moves forward against the elastic body. as a result,
Since the horizontal pin is located forward with respect to the connection pin, the swinging rod swings so that the outer end is directed forward and inward, and the engaging portion provided at the outer end is engaged with the ring gear. In addition, the engagement portion can be detached from the ring gear by moving the horizontal pin backward with respect to the connection pin as the disk is retracted.

[0006]

However, according to the above-mentioned conventional construction, when the swinging rod is swung around the horizontal pin, the engaging portion is swung inwardly toward the front and the ring gear is rotated. When the diameter of the ring gear changes due to a change in the model of the internal combustion engine, a state in which only a part of the ring gear is engaged occurs in a state where the engagement portion is inclined, and power transmission cannot be reliably performed. This may cause damage to the engaging portion. In addition, since the front-rear movement on the disk side is performed by a cylinder device (drive device) that operates on an axis displaced with respect to the output shaft axis, the operating force is not sufficiently transmitted to the engagement portion, A cylinder device having a large power is required to ensure the engagement, and the entire size is increased due to the displacement of the cylinder device with respect to the axis of the output shaft.

An object of the present invention is to provide an internal combustion which can always perform reliable engagement irrespective of a change in the diameter of a ring gear, and can transmit an engagement force without loss, and can be formed compact as a whole. An object of the present invention is to provide a power transmission device in an engine test device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a power transmission device in an internal combustion engine test apparatus according to the present invention includes a front-rear output shaft interlocked with a motor, an end of the output shaft and a main shaft of the internal combustion engine. A power transmission device in an internal combustion engine test apparatus having an engagement portion engageable with a ring gear attached to a main shaft in a state where the end portions of the output shaft are opposed to each other. The cylinder that is movable only in the front-rear direction is externally fitted, and the cylinder device is arranged by externally fitting the rear part of the cylindrical body. In conjunction with the movement, a rotating body that allows only the front-back movement of the cylindrical body is fitted on the front part of the cylindrical body, and the bending link swings on the rotating body via the horizontal axis in the left-right direction. While freely arranging, one end of this refraction link is attached to the cylindrical body. The rotating body is provided with a sliding body which is movable in a direction orthogonal to the axis of the output shaft in response to the swing of the refraction link, in conjunction with the cylindrical body in response to the movement only in the front-back direction of the cylindrical body. The engaging portion is provided on the moving body side.

[0009]

According to the configuration of the present invention, when the internal combustion engine is arranged with the end of the output shaft and the end of the main shaft facing each other,
The piston body of the cylinder device is operated to one side, and by moving the cylinder body to the same side, the refraction link swings around the horizontal axis, thereby moving the slide body outward to engage. The joint is moved outward.

In this state, the cylinder device is operated in reverse,
When the piston body externally fitted to the output shaft is moved to the other side, the cylindrical body located between the output shaft and the piston body moves to the same side, and the refraction link is moved to the horizontal axis. It swings around in the opposite direction to that described above, with which the sliding body moves inward to move the engaging portion linearly inward, thereby engaging the ring gear with the engaging portion from the outside. obtain. The disengagement of the engaging portion with respect to the ring gear can be performed by the opposite operation, that is, by operating the piston body to one side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a front-rear output shaft, the base end of which is linked to a motor 2 via a rotary joint 3. The output shaft 1 is formed on a spline shaft, and a drive plate 4 is mounted on the base. A cylindrical body 6 is fitted on the output shaft 1 via a pair of spline cylinders 5, and the cylindrical body 6 can be moved only in the front-back direction along the output shaft axis by the spline fitting.

A cylinder device 7, which is disposed so as to be fitted to the rear portion of the cylinder 6, has a cylindrical main body 8 on the outside, a cylindrical piston body 9 on the inside, and front and rear cylinder chambers 10, It comprises supply and discharge ports 12 and 13 communicating with 11. And the cylinder 6
By externally fitting the piston body 9 through the bearing device 14, the piston body 9 moves integrally with the cylinder body 6 in the front-rear direction and is interlocked with the cylinder body 6 to allow the rotation of the cylinder body 6. The main body 8 is provided with a tachometer 15 facing the drive plate 4 via a bracket 16.

A rotary body 20 that allows the cylindrical body 6 to move only in the front-rear direction is fitted on the front of the cylindrical body 6. That is, the key 21 is fixed to the outer surface of the cylindrical body 6 and
A slit 22 in the front-rear direction in which the inside 21 is fitted is formed on the inner peripheral surface of the rotating body 20. The rotating body 20 is rotatably supported by the cover body 24 via a bearing device 23 fitted to the base thereof. Here, the cover body 24 has a cylindrical shape, and the main body 8 of the cylinder device 7 is integrated with a base end surface thereof via a fixing tool 25.

A bending link 27 is provided on the rotating body 20 via a horizontal axis 26 in the left-right direction so as to be swingable. That is, in the rotating body 20, concave portions 28 are formed at a plurality of positions (for example, three positions) in the circumferential direction with the output shaft axis as the center, and the front portions are opened and the central portions communicate with each other. The link 27 is arranged, and the output shaft 1 and the front part of the cylindrical body 6 are located at the center.

The bending link 27 has an L-shape, is swingably supported by the horizontal shaft 26 via a corner portion thereof, and has one end fitting portion 27A facing the cylindrical body 6 and a front portion facing forward. An end fitting portion 27B is formed. And refraction links
The one end 27 is engaged with the annular groove 17 formed at the front end of the cylindrical body 6 by fitting its one end fitting portion 27A so as to respond only to the forward and backward movement of the cylindrical body 6.

The rotating body 20 is provided with a sliding body 30 which is movable in a direction orthogonal to the axis of the output shaft in response to the swing of the refracting link 27. That is, the sliding body 30 has a convex cross section, the wide portion of which is fitted into the concave portion 28, and the guide plate 31 facing the front surface on both sides of the wide portion is fixed.
The sliding member 30 becomes movable by being fixed to the rotating body 20 by 32, and a concave groove 33 is formed on the rear surface side of the sliding body 30 along the horizontal axis 26, and the other end of the bending link 27 is fitted to the concave groove 33. Part 27B
Are fitted.

From the front side of each sliding body 30, a fixture 34 is provided.
Arms 35 are connected to each other via an armature, and an engagement portion 36 is provided on the inner surface side at the front of these arms 35. A stopper plate 38, which is adjustable in the form of a screw shaft, is provided on a receiving plate 37 fixed to the center of the front surface of the rotating body 20, and the front surface of the cylindrical body 6 can contact the stopper body 38 freely. Become.

Reference numeral 40 denotes an internal combustion engine, whose main shaft 41 has a disk 42
The ring gear 43 is attached via the. Here, the end of the output shaft 1 and the end of the main shaft 41 of the internal combustion engine 40 are opposed to each other, and when the front end of the cover body 24 is in contact with the internal combustion engine main body, the engagement with the ring gear 43 is performed. The part 36 is configured to be opposed from the outside. At least one of the main body 8 and the cover body 24 of the cylinder device 7 is fixed to a base body or the like.

The operation of the above configuration will be described below.
FIG. 1 shows the state before the engagement. That is, the internal combustion engine 40 is arranged in a state where the end of the output shaft 1 and the end of the main shaft 41 face each other, and the front end of the cover body 24 is in contact with the internal combustion engine main body.

At this time, the piston body 9 of the cylinder device 7
Is moving forward in a direction away from the motor 2, and is moving forward through the bearing device 14 until the cylindrical body 6 comes into contact with the stopper body 38. When the annular groove 17 moves forward, the bending link 27 is moved to the horizontal axis 26 so that the one end fitting portion 27A moves forward.
, And the other end fitting portion 27B moves outward accordingly. Further, the moving force is increased by the sliding body through the groove 33.
The sliding body 30 is moved to the outside in the recess 28. Thereby, the engaging portion 36 moves outward via the arm 35, and the ring gear 43 can be easily arranged inside the engaging portion 36.

In this state, the cylinder device 7 is operated in reverse to move the piston body 9 externally fitted to the output shaft 1 toward the motor 2 (reverse movement). Then, the cylindrical body 6 located between the output shaft 1 and the piston body 9 moves backward through the motor bearing device 14, and the annular groove 17 moves backward. The refracting link 27 swings around the horizontal axis 26 so that 27A moves backward, and accordingly, the other end fitting portion 27B is moved inward. Further, the inward moving force is transmitted to the sliding member 30 via the concave groove 33, and moves the sliding member 30 inward in the concave portion. As a result, the engaging portion 36 is
Moves linearly inward, so that the ring gear 43
Will engage from the outside.

As a result, the rotation of the motor 2 is controlled by the output shaft 1,
Spline cylinder 5, cylinder 6, key 21, rotating body 20, sliding body 3
The power is transmitted to the main shaft 41 via the arm 35, the engagement portion 36, and the ring gear 43. At this time, the rotation of the cylinder 6 is performed by cutting off the piston 9 by the bearing device 14, and the rotation of the rotating body 20 is performed by cutting off the cover 24 by the bearing device 23. The disengagement of the engagement portion 36 from the ring gear 43 can be performed by the opposite operation, that is, by actuating the piston body 9 away from the motor 2.

[0023]

According to the present invention having the above structure, when the internal combustion engine is arranged with the end of the output shaft and the end of the main shaft facing each other, the piston body of the cylinder device operates on one side, By moving the cylinder to the same side, the refraction link can swing around the horizontal axis, and accordingly, the sliding body can move outward and the engaging portion can move outward.

In this state, the cylinder device is operated in reverse,
When the piston body externally fitted to the output shaft is moved to the other side, the cylinder located between the output shaft and the piston body can be moved to the same side, and the refracting link is moved around the horizontal axis as described above. The sliding body can be moved inward by swinging in the opposite direction, and the engaging portion can be linearly moved inward to engage the ring gear from outside.

As described above, according to the present invention, since the engaging portion can be moved linearly to engage with the ring gear, reliable engagement can always be performed irrespective of a change in the diameter of the ring gear, and power transmission can be achieved. This can be performed reliably, and damage to the ring gear and the engaging portion can be reduced. Moreover, since the cylinder device can be operated on the axis of the output shaft, the transmission of the engaging force can be performed without loss, thereby enabling the cylinder device with low power to be arranged in a small space,
The whole can be formed compact.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view showing an embodiment of the present invention before engagement of a power transmission device.

FIG. 2 is a partially cutaway side view when the power transmission device is engaged.

FIG. 3 is a cross-sectional plan view of the sliding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Output shaft 2 Motor 5 Spline cylinder 6 Cylindrical body 7 Cylinder device 9 Piston body 17 Annular groove 20 Rotating body 24 Cover body 26 Horizontal axis 27 Refraction link 27A One end fitting part 27B Other end fitting part 28 Recess 30 Sliding body 33 Recess Groove 35 Arm 36 Engagement part 40 Internal combustion engine 41 Main shaft 43 Ring gear

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01M 15/00 F02B 61/06 G01M 17/00

Claims (1)

(57) [Claims] 1. A front-rear output shaft interlocked with a motor,
A power transmission device in an internal combustion engine test apparatus having an engagement portion that is engageable with a ring gear attached to a main shaft in a state where an end of the output shaft and an end of a main shaft of the internal combustion engine face each other, A cylinder that is movable only in the front-rear direction along the axis of the output shaft is externally fitted to the output shaft, and a cylinder device is externally fitted to a rear portion of the cylinder, and a piston body of the cylinder device is provided. A cylindrical body is interlocked with the cylindrical body so as to move in the front-rear direction, and a rotary body that allows the cylindrical body to move only in the front-rear direction is externally fitted to the front part of the cylindrical body. A refraction link is swingably disposed via the horizontal axis of the revolving link, and one end of the refraction link is interlocked with the cylinder so as to respond only to the movement of the cylinder in the front-rear direction.
A sliding body movable in a direction perpendicular to the axis of the output shaft in response to the swing of the refraction link, and the engaging portion provided on the side of the sliding body; Transmission device.