JPH0618372A - Rolling resistance measuring tester - Google Patents

Abstract

PURPOSE:To always measure rolling resistance with high accuracy. CONSTITUTION:In a rolling resistance measuring tester measuring the rolling resistance of the tire 2 mounted on an axle by rotating the tire a running drum, a belt 16 is set over the shaft 1 and the pulley 13 provided so as to be adjacent to the shaft 1 during non-measurement and the shaft 1 is rotated through the belt 16. At the time of measurement, the belt 16 is detached from the shaft 1 and the tire 1 is mounted on the shaft 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling resistance measuring device.

[0002]

2. Description of the Related Art In recent years, the rolling resistance measurement of tires has been required to have a very high accuracy of 100 gf unit due to environmental problems.

However, the conventional Korogari resistance measuring / testing apparatus is usually used for passenger car tires (low load, low Korogari resistance) and truck / bus tires (high load, high load) because of the relationship between the load and the Korogari resistance value. It is a so-called 1-drum biaxial type capable of measuring (for rolling resistance).

Therefore, while the tire is mounted on one of the shafts and the tire is run to perform the measurement, the other shaft is not used. (Normally, it is not possible to measure both axes simultaneously because of the relationship with the measuring device.)

By the way, when the shaft on which the tire is mounted is stopped from rotating for a long time, the state of the grease adhered to the bearing is different from the state of the grease during the rotation until then, and the measurement after the long stop is performed. And, the measurement values up to that point were out of order. For this reason, if the shaft is stopped for each hour, the temperature rises until then, the grease becomes soft, and the weight of the bearing grease moves the grease downward, causing a shortage of grease on the bearing, causing the bearing to rotate. However, it becomes difficult to perform normal measurement due to rattling.

[0006]

Therefore, in order to make a normal measurement on an axis that has not been used for a long period of time,
Before the test, the shaft on which the tire is mounted is rotated for a long time (for example, 2-3 days) (so-called running-in),
Alternatively, it has been necessary to keep the tire running and not to stop it for about an hour.

That is, in the case of running-in, the running drum for rotating the tire must be rotated, so that useless electric power for operating the load device is used and a tire for running-in is required. was there.

Further, it has been impossible to stop the shaft for a long period of time due to various restrictions.

Therefore, it is an object of the present invention to provide a corollary resistance measuring / testing device which can always accurately measure the corollary resistance.

[0010]

A rolling contact resistance measuring and testing apparatus according to the present invention is a rolling contact resistance measuring and testing apparatus for contacting a tire mounted on a shaft with a running drum to rotate the running tire to measure the rolling resistance of the tire. In this case, a rotational force transmission member releasably engaged with the shaft without the tire attached thereto, and a drive mechanism for driving the rotational force transmission member in the engagement state to rotate the shaft without the tire attached thereto. And ,.

[0011]

[Function] During non-measurement when the tire is not mounted, only the shaft can be rotated through the torque transmission member,
The grease state of the bearing of the shaft can be kept constant during measurement and during non-measurement.

Further, when the roller resistance is measured, the rotational force transmitting member can be removed from the shaft, and the tire can be mounted on the shaft without the transmitting member being an obstacle.

[0013]

The present invention will be described in detail below with reference to the drawings illustrating the embodiments.

FIG. 3 shows an essential part of a rolling contact resistance measuring and testing device according to the present invention. In this device, a tire 2 mounted on a shaft 1 is brought into contact with a running drum 3 to rotate and run, and a measuring means (not shown) Then, the rolling resistance of the tire 2 is measured.

The shaft 1 has an intermediate medium diameter portion 6 to which the base end large diameter portion 4 and the rim 5 of the tire 2 are detachably attached.
And a tip small diameter portion 7 to which a tire rim is mounted, and a base end large diameter portion 4 is inserted into a cover 8 attached to a fixing portion (not shown) and supported via a bearing. That is, the shaft 1 in which the large diameter portion 4 at the base end, the intermediate diameter portion 6 at the middle portion, and the small diameter portion 7 at the distal end are integrated is held by the fixed portion so as to be rotatable around its axis.

Therefore, when measuring the rolling resistance, as shown in FIG. 3, the rim 5 is attached to the end surface 6a of the intermediate diameter portion 6 of the shaft 1 through the attachment 9 such as a bolt, and the shaft 1 and the tire 2 are attached.
Integrate with.

Then, in this state, the traveling drum 3 which is in pressure contact with the tire 2 is rotated about its central axis,
The tire 2 is rotated, and the rolling resistance value is measured by a measuring means (not shown).

Therefore, as shown in FIG. 1 (only one of the two shafts is shown), this device includes a rotational force transmission member 10 which engages with the tip small diameter portion 7 of the shaft 1 and the transmission member. And a drive mechanism 11 for driving the shaft 1 to rotate the shaft 1.

Here, the drive mechanism 11 includes a motor M, a transmission 12 that is interlocked with the output shaft of the motor M, and a pulley 13 that is interlocked with the transmission 12.
Drive, the driving force is transmitted via the transmission 12 to the pulley.
When transmitted to the pulley 13, the pulley 13 rotates about its axis.
Further, in this case, the pulley 13 is composed of a disc-shaped main body 14 and a rubber coating portion 15 for covering the outer peripheral surface of the main body 14 as shown in FIG.

Further, the rotational force transmitting member 10 is made up of an endless belt 16 in this embodiment, and has a pulley 13
And the tip small diameter portion 7 of the shaft 1.

Thus, the pulley 13 can be freely moved toward and away from the shaft 1, and the belt 16 can be freely attached to and removed from the shaft 1.

That is, a jack member 17 is connected to the drive mechanism 11, and the expansion and contraction of the jack member 17 causes the pulley to move.
13 moves toward and away from the shaft. The jack member 17
Is that by rotating the handle 18,
A screw rod 19 projecting from 18 rotates about its axis, and the left and right pivotal support portions 21, 21 of the panda graph portion 20 screwed to the screw rod 19 approach and separate from each other, Graph part 20
The upper pivot portion 22 (the motor M and the transmission 12 are fixed to the pivot portion 22) moves up and down.

The jack member 17 is held on the base 23. Specifically, the lower pivot portion 25 of the pandagraph portion 20 is attached to the upper surface 24 of the base 23. The base 23
It is preferable that casters are attached to the legs to allow the base 23 to move.

Therefore, by rotating the handle 18,
When 22 is raised, the pulley 13 comes close to the shaft 1 and the belt 16 hung on the pulley 13 and the small diameter portion 7 is loosened,
The belt 16 can be detached from the small diameter portion 7, and from the detached state, the belt 16 is hung on the pulley 13 and the small diameter portion 7, and then the handle 18 is operated to lower the pivot support portion 22. The pulley 13 is separated from the shaft 1, and the belt 16 can be mounted with appropriate tension.

That is, according to this device, the tire 2 is attached to the shaft 1.
When the roller is not attached and the roller resistance is not measured, the belt 16 is hung on the small diameter portion 7 of the shaft 1 and the shaft 1 is rotated as shown in FIGS.

Therefore, a so-called running-in operation can be performed during non-measurement. That is, during non-measurement, the shaft 1 can be rotated, the grease state of the bearing of the shaft 1 can always be kept constant, the rotation of the shaft 1 can be eliminated, and highly accurate measurement can be performed. It can be performed.
In this case, the belt 16 is hung on the small-diameter portion 7 and the pulley 13 of the shaft 1, and the rotatable state of the shaft 1 is the engaged state of the rotational force transmitting member 10. In FIG. 1, reference numeral 26 indicates a rotary joint.

Next, FIG. 4 shows another embodiment. In this case, the rotational force transmitting member 10 is formed with a pulley 27. That is, in this case, as shown in FIG.
The pulley 1 is pressed against the intermediate medium-diameter portion 6 of the shaft 1 and the pulley 27 rotates about its axis, thereby rotating the shaft 1. In addition,
The portion where the pulley 27 is in pressure contact is not limited to the medium diameter portion 6.

However, also in this case, the drive mechanism 11 for rotationally driving the pulley 27 is provided with the motor M and the transmission 12, and the drive mechanism 11 uses the approaching / separating mechanism 28 with respect to the shaft 1. The pulleys 27 are approached and separated from each other, and the pulley 27 is brought into a state of being pressed against the medium diameter portion 6 as shown in FIG. 6 or a state of being separated from the medium diameter portion 6 as shown in FIG.

Here, the approaching / separating mechanism 28 is a cylinder.
29 and a pivot member 31 that is swingably attached to the fixed portion 30.
And a tip end portion of a piston rod 29a of the cylinder 29 is pivotally attached to the drive mechanism 11,
The lower end of the main body 29b of the main body is pivotally attached to the floor surface F. Also,
The pivot member 31 includes, for example, a holding rod 32 protruding from the fixing portion 30 as shown in the figure, and a swinging rod 33 having a base end portion swingably supported by a tip end portion of the holding rod 32. , And the tip of the swing rod 33 is pivotally supported by the drive mechanism 11.

Therefore, as shown in FIG. 4, when the piston rod 29a is retracted as shown in FIG. 6, when the piston rod 29a is extended, the swing rod 33 is rotated about the holding rod 32 as shown in FIG. Swing in the direction of arrow A, and as shown by the phantom line, pulley 27
Is pressed against the medium diameter portion 6, and conversely, if the piston rod 29a is retracted from this state, the swing rod 33 of the pulley 27 swings as shown by arrow B, and as shown in FIGS. And is separated from the intermediate diameter portion 6.

That is, in the state shown in FIG. 4, the tire 2 can be mounted on the shaft 1 and the roller resistance of the tire 2 can be measured, and in the state shown in FIG. It is pressed against the diameter portion 6 (the rotational force transmitting member 10 is engaged with the shaft 1), and the pulley 27 is driven by the drive mechanism 11.
Can be rotated to rotate the shaft 1, and the running-in operation of the shaft 1 can be performed.

The present invention is not limited to the above-mentioned embodiment, and the design can be freely changed without departing from the scope of the present invention. For example, as a mechanism for moving the drive mechanism 11 close to and away from the shaft 1. May be a vertical movement mechanism provided with a screw rod and a nut member screwed onto the screw rod so as to be able to advance and retreat, and the outer dimensions of the pulleys 13 and 27 may be freely set. You can

[0033]

Since the present invention is constructed as described above, it has the following effects.

When measuring the roller resistance, the resistance can always be measured in a stable state, and the measured value is highly accurate.

Further, during the measurement, the rotational force transmitting member 10 can be separated from the shaft 1 and there is an advantage that it does not interfere with the measurement.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of a main part during measurement.

FIG. 4 is a front view of another embodiment.

FIG. 5 is a side view of the same.

FIG. 6 is a front view during shaft rotation.

[Explanation of symbols]

 1 axis 2 tire 3 traveling drum 10 rotational force transmission member 11 drive mechanism

Claims (1)

[Claims] 1. A tire having a tire 2 mounted on a shaft 1 is brought into contact with a running drum 3 to rotate and run, and in a rolling resistance measuring device for measuring the rolling resistance of the tire 2, the shaft without the tire mounted thereon. And a driving mechanism 11 for driving the rotational force transmitting member 10 in the engaged state to rotate the shaft 1 in the tire non-mounted state.
And a rolling device for measuring and measuring resistance to roller.