JPH11183298A - Uniformity and dynamic-balance composite testing apparatus for tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make executable both uniformity test and a dynamic-balance test by using a single apparatus by regulating the vibration of a rotation support member in the uniformity test, releasing the regulation of its vibration in the dynamic-balance test, and making the rotation support member vibratile. SOLUTION: The uniformity and dynamic-balance composite testing apparatus is provided with a dynamic-balance test means which turns a rotation support member and which measures the dynamic balance of a tire and a uniformity test means which turns the rotation support member in a state that a rotating drum is presses to the tire and which measures the uniformity of the tire. Then, in the uniformity test, the vibration of the rotation support member is regulated by a vibration regulation means. In the dynamic-balance test, the regulation of its vibration by the vibration regulation means is released. The rotation support member can be vibrated. Thereby, the tire is held firmly, the uniformity test is made, the tire is held so as to be capable of being vibrated, and the dynamic-balance test can be made. Consequently, both tests can be made by one apparatus, the installation space of the apparatus can be saved, and the cost of the apparatus can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire uniformity test device and a dynamic balance test device.

[0002]

2. Description of the Related Art Conventionally, there are known a uniformity test apparatus for measuring a variation in force generated by a rotating tire and a dynamic balance test apparatus for measuring an eccentric state of a tire. The uniformity test device rotates the tire with the rotating drum pressed against the outer peripheral surface of the tire,
The tire is configured to measure radial and thrust load variations. Since the load when the rotating drum is pressed against the tire reaches 100 kg or more, it is necessary for the test apparatus to firmly support the tire. On the other hand, the dynamic balance testing device
Since the eccentricity of the tire is detected from a change in the vibration state when the tire is rotated, it is necessary to support the tire so that it can vibrate.

[0003]

As described above, since the uniformity test device and the dynamic balance test device have completely different ways of supporting the tires, the uniformity test and the dynamic balance test can be performed by one device. Both of the tests could not be performed. For this reason, both a uniformity test device and a dynamic balance test device are required, and there is a problem that a space is required and a cost is increased.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a combined test apparatus capable of performing a uniformity test and a dynamic balance test of a tire with one apparatus.

[0005]

In order to achieve the above object, a tire uniformity and dynamic balance combined test apparatus according to the present invention comprises: (a) a rotary support which rotates while holding a pair of rims of a tire; A member, (b) holding means for holding the rotation supporting member so that it can vibrate in a predetermined direction, (c) vibration regulating means for restricting vibration of the rotation supporting member, and (d) rotating the rotation supporting member, Dynamic equilibrium test means for measuring the dynamic equilibrium of the tire; and (e) uniformity test means for measuring the uniformity of the tire by rotating the rotating support member with the rotating drum pressed against the tire. It is configured. At the time of the uniformity test, the vibration of the rotation supporting member is regulated by the vibration regulating means,
At the time of the dynamic balance test, the regulation by the vibration regulating means is released so that the rotation supporting member can be vibrated.

With this configuration, it is possible to perform a uniformity test while holding the tire firmly (without vibrating), and to perform a dynamic balance test while holding the tire vibrably. Therefore, it becomes possible to perform both the uniformity test and the dynamic balance test with one device,
Installation space can be saved and costs can be reduced. The direction of the vibration of the rotation supporting member is a direction orthogonal to the direction of the rotation axis of the rotation supporting member.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show a uniformity and dynamic balance combined test apparatus 1 (hereinafter, referred to as a “uniformity”) of this embodiment.
2A and 2B are a side view and a top view illustrating a basic configuration of a combined test apparatus 1). In the following description, “upper” and “lower” are defined as shown in FIG. 1, but the configuration of the composite test apparatus 1 may be upside down or may be horizontal.

The apparatus frame of the composite test apparatus 1 includes a base 50, a column 52 extending vertically upward from the base 50,
And a top plate 54 supported by a support 52. A spindle 100 for holding and rotating the tire T is attached to the base 50.

[0009] The composite test apparatus 1 is used to remove the tire T from the lower rim 10.
And the upper rim 20 so as to be sandwiched and held vertically. First, a configuration for supporting the tire T will be described.

FIG. 3 is a side sectional view showing the spindle 100. The spindle 100 has a hollow spindle shaft 12
0, the bracket 150 and the hollow shaft 170 are coaxially combined (so that the central axes are aligned on a straight line). The spindle shaft 120 is rotatably supported by the spindle housing 110 (via a bearing 112). Spindle housing 110
Are attached to the base 50 (FIG. 1) via four horizontal bar springs 102 (described later).

The lower rim 10 is attached to the upper end of the hollow shaft 170 of the spindle 100. The lock shaft 300 having the upper rim 20 fixed to the upper end portion is inserted into the bracket 150 through the hollow shaft 170, so that the tire T
Can be interposed and held.

A lock groove 302 is formed on the outer periphery of a lower portion of the lock shaft 300 in a multi-step shape, and
50 is provided with a lock member 160 facing the outer peripheral surface of the lock shaft 300. The lock member 160
Locking cylinder 1 attached to bracket 150
Driven by 65 is in a direction approaching / separating from the outer peripheral surface of the lock shaft 300.

Locking member 160 and locking cylinder 16
Four sets 5 are provided at intervals of 90 ° with respect to the center axis of the lock shaft 300 (only two sets are shown in FIG. 3). The lock member 160 includes six vertically arranged lock claws 162, which are engaged with the lock grooves 302 of the lock shaft 300.

The lock member 160 is a lock cylinder 16
5 is attached to the tip of the plunger 166. Supply of air to the locking cylinder 165 will be described later. The plunger 166 is a lock cylinder 1
65 is urged in a direction away from the lock shaft 300 by a spring 168 provided on the main body of the first member 65. That is, the lock member 160 is urged away from the lock shaft 300. Thus, the locking cylinder 165
Is turned on, the lock member 160 is
0 and the lock member 160 releases the lock shaft 300 when the lock cylinder 165 is off.

With the above-described configuration, the lock shaft 300 is connected to the bracket 150 of the spindle 100.
And turning on the locking cylinder 165, the tire T can be reliably held between the lower rim 10 and the upper rim 20. In addition, by turning off the lock cylinder 160 to release the lock and pulling out the lock shaft 300 from the spindle 100,
The tire T can be removed from between the lower rim 10 and the upper rim 20. The configuration for driving the lock shaft 300 will be described later.

The bracket 150 has a lock member 1 attached thereto.
A pin 154 that moves up and down with the movement of 60 is provided. The pin 154 projects upward from the surface on which the lock member 160 slides, and is pressed against a concave portion 164 formed on the bottom surface of the lock member 160. And the pin 154
By detecting the disk 156 attached to the lower end of the lock member 160 with a detection device (not shown), the lock member 160 is at a position where the lock member 160 is engaged with the lock shaft 300 (lock position) or at a position away from the lock shaft 300 (lock Release position).

At the lower end of the spindle shaft 120, a pulley 140 for rotating the spindle shaft 120 is mounted. An endless belt 142 is stretched over the pulley 140 and is rotationally driven (via the endless belt 142) by a spindle drive motor 130 fixed to the base 50. That is, when the spindle drive motor 130 is rotated, the spindle 100 rotates while holding the tire T between the lower rim 10 and the upper rim 20.

The spindle 100 has its spindle shaft 1
The air is fed (inflated) to the tire T from a rotary joint 145 provided at the lower end of the tire 20. Therefore, an air pipe 115 penetrating vertically through the spindle shaft 120 is provided in a hollow portion of the spindle shaft 120. The upper end of the air pipe 115 is fixed to the air pipe 115 by a flange 116, and the lower end is connected to a rotary joint 145.

An air hose 132 for feeding air into the air pipe 115 is connected to the rotary joint 145. The air sent from the air hose 132 via the rotary joint 145 passes through the air pipe 115 upward, and further escapes from the cavity 117 formed above the flange 116 into an air passage (not shown) formed in the bracket 150. , Through the air passage 172 of the hollow shaft 170 and into the tire T.

[N] Thus, the portion from the rotary joint 145 to the air passage 172 forms an air supply system for inflating air to the tire T. An air passage (not shown) for supplying air to the lock cylinder 165 branches off from the air supply system. Here, the description of the details of the air passage is omitted.

The upper rim 20 is connected to the lock shaft 300
A fixing ring 320 is provided on the attachment member 310 for attaching to the chuck claw 222 described below from inside.

An inserter unit 200 for driving the lock shaft 300 up and down to insert (or pull out) the spindle 100 from the spindle 100 is attached to a lifting housing 60 disposed above the top plate 54 shown in FIG. The elevating housing 60 is vertically movably supported by four sets of linear guides 61 extending vertically and a carriage 62 (only one set is shown in FIG. 1), and is driven up and down by a pair of elevating cylinders 65.

FIG. 4 is a sectional view showing the internal structure of the inserter unit 200. Inserter unit 20
0 has an intermediate shaft 240 rotatably supported so as to be able to rotate following the spindle 100. The intermediate shaft 240 is attached to the lower end of a rotating shaft 250 that is rotatably supported by the lifting housing 60 (via a bearing 255).

The lower end of the intermediate shaft 240 is provided with a chuck claw 222 which engages with the fixing ring 320 of the lock shaft 300 from inside. The chuck pawl 222 is urged inward by a spring member 224. A chuck driving member 230 having a conical tip is held on the intermediate shaft 240 so as to be vertically movable, and the conical tip contacts the tapered surface of the chuck claw 222 from above.

The chuck driving member 230 is driven up and down by air pressure. That is, the cavity 242 is formed inside the intermediate shaft 240, and the cavity 2
At 42, a diaphragm 235 fixed to the upper end of the chuck driving member 230 is provided. In order to supply air to the cavity 242, the hollow portions inside the rotary shaft 250 and the intermediate shaft 240 are connected to the air pipe 26.
2 penetrates. A rotary joint 260 for supplying air to the air pipe 262 is provided at an upper end of the rotating shaft 250, and the rotary joint 260 has an air hose 266 connected to an air supply source (not shown).
Is connected.

With such a configuration, air is supplied from the rotary joint 260 and the cavity 24 is supplied.
When the internal pressure of No. 2 is increased, the chuck driving member 230 is lowered. As a result, the chuck pawl 222 moves outward (against the elastic force of the spring member 224) and engages with the fixing ring 32. On the other hand, when air is discharged from the rotary joint 260 to lower the internal pressure of the cavity 242, the chuck driving member 230 rises. Thereby, the chuck claw 222 moves inward by the elastic force of the spring member 224, and the lock of the fixing ring 32 by the chuck claw 222 is released. FIG. 4 shows both a state where the chuck claw 222 locks the fixing ring 32 (the left side of the dashed line) and a state where the lock is released (the right side of the dashed line).

Thus, by supplying air from the rotary joint 260, the chuck pawl 222 chucks the fixing ring 320 of the lock shaft 300 (inserted into the spindle 100). When the spindle 100 is rotated in this state, the rotating shaft 250 and the intermediate shaft 240 are also driven to rotate.

As shown in FIG. 1, a stepwise adjusting member 70 for adjusting the position of the lock shaft 300 in the vertical direction is provided on the top plate 54. The adjustment member 70 is configured to be slidable on a guide rail 71 provided on the top plate 54, and moves along the guide rail 71 by a ball screw mechanism 74 driven by a motor 72 via a belt 73. . The elevating housing 60 is provided with an elevating stopper 68 (FIG. 2) that comes into contact with the step portion of the adjusting member 70 from above.

The holding of the tire T by the composite test apparatus 1 configured as described above is performed as follows. First, air is supplied from the rotary joint 260 to chuck the lock shaft 300 with the chuck claws 222, and the elevating cylinder 65 is driven to elevate the elevating housing 60 to pull out the lock shaft 300 from the spindle 100. Next, after setting the tire T on the lower rim 10, the motor 72 is driven to move the adjusting member 70 to an appropriate position. Then, the lifting cylinder 65 is driven again to lower the lifting housing 60 (until the lifting stopper 68 contacts the adjustment member 70). When the lifting stopper 68 comes into contact with the adjusting member 70, the locking cylinder 165 is turned on, and the locking member 160 is engaged with the lock shaft 300 again.

The upper rim 10 and the lower rim 2 depend on which stage of the lock groove 302 of the lock shaft 300 engages the lock claw 162 (of the lock member 160).
The distance from 0 can be adjusted according to the tire width. Description of this adjustment is omitted.

Next, a description will be given of a uniformity test and a dynamic balance test using the composite test apparatus 1. FIG. 5 is a sectional view taken along line AA ′ of FIG. Spindle housing 11
Numeral 0 is attached to the base 50 via a horizontally extending bar spring 102, and at the same time is supported by a bar member 104 suspended vertically from the base 50 as shown in FIG. The bar member 102 can be elastically deformed in a bending direction indicated by W in the drawing, and the spindle housing 110 can vibrate in one direction (X) in a plane orthogonal to the center axis of the spindle 100.

In order to detect vibration in the X direction when the spindle 100 is rotated with the tire T mounted, a mounting bar 180 is mounted on the spindle housing 110 so as to extend in a direction perpendicular to both the X direction and the spindle axis direction. Have been. Further, the base 50 is opposed to the mounting bar 180.
The mounting bar 182 also extends from the opening. Two mounting bars 1
A load cell 185 for detecting a load applied in the X direction is interposed between 80 and 182.

Here, at the time of uniformity measurement in which a large load is applied to the spindle shaft 120, it is necessary to suppress the spindle housing 110 from vibrating. Therefore, as shown in FIG. 5, a pressing member 192 having a conical tip is provided on the base 50, and a pair of tapered recesses 194 for receiving the pressing member 192 are formed in the spindle housing 110. The pressing member 192 is driven by the vibration regulating cylinder 190.

That is, at the time of the uniformity test, the vibration regulating cylinder 190 is turned on to push the pressing member 112 into the concave portion 1.
02 to the spindle housing 11
0 is pressed so as not to vibrate, and at the time of the dynamic balance test, the vibration restricting cylinder 190 is turned off to separate the pressing member 112 from the concave portion 102 so that the spindle housing 110 can vibrate in the X direction.

At the time of the uniformity test, the chuck claw 222 is fixed to the fixing ring 32 of the lock shaft 300.
0 is engaged. That is, the tire is moved up and down (spindle 100
Side and the inserter unit 200 side) to firmly support the tire so as to withstand the load when the rotating drum 30 is pressed. On the other hand, at the time of the dynamic balance test, the chuck by the chuck claws 222 is released so that the spindle housing 110 can vibrate in the X direction.

When performing the dynamic balance test, the composite test apparatus 1
The control unit (not shown) inflates air into the tire T held between the lower rim 10 and the upper rim 20, then rotates the spindle 100, and causes the load cell 185 to rotate while the spindle 100 is rotating. Such a change in load is detected. Since a method of calculating the dynamic balance based on the detected load fluctuation is known, the description is omitted. Composite test equipment 1
Calculates which part of the tire T should be put on the balance weight based on the calculation result of the dynamic balance, and performs marking on the position by a marking device (not shown).

In the uniformity test, the spindle 1
The rotary drum 300 provided on the side of the 00 is used. The rotating drum 30 is mounted on a movable housing 32 slidable on a rail 31 extending in a direction approaching / separating from the tire T, and is driven by a motor 34 (FIG. 2), and a rack and pinion mechanism 35 (pinion 36. Rack 3
8) to move in the direction of approach / separation with respect to the tire T. The rotating shaft of the rotating drum 30 includes a rotating drum 3.
A load cell 33 for detecting a reaction force (radial direction and thrust direction) that 0 receives from the tire T is attached.

At the time of the uniformity test, the control unit (not shown) of the composite test apparatus 1 drives the motor 34 to press the rotating drum 30 against the tire T,
Rotate 0. Then, a change in the load applied to the load cell 33 during the rotation of the spindle 100 is detected. Since a method of calculating the uniformity based on the detected load fluctuation is known, the description is omitted. Composite test equipment 1
Calculates how much and how much of the tire T is to be cut based on the calculation result of the uniformity, and cuts the tire T with a cutting device (not shown).

With such a configuration, according to the composite measuring apparatus 1 of this embodiment, both uniformity and dynamic balance can be measured by one apparatus.

Finally, the correspondence between the characteristic configuration of the present invention and the embodiment will be described. The tire uniformity and dynamic balance combined test device according to the present invention comprises: (a) a rotation support member that rotates while holding a pair of rims of the tire;
(B) holding means for holding the rotation support member so that it can vibrate in a predetermined direction; (c) vibration regulation means for restricting vibration of the rotation support member; and (d) rotation of the tire by rotating the rotation support member. Dynamic balance test means for measuring the balance; and (e) uniformity test means for measuring the uniformity of the tire by rotating the rotating support member with the rotating drum pressed against the tire. ing. And
At the time of the uniformity test, the vibration of the rotation supporting member is regulated by the vibration regulating means, and at the time of the dynamic balance test, the regulation by the vibration regulating means is released to allow the rotation supporting member to vibrate.

Here, the above-mentioned "rotation support member" corresponds to the spindle 100, the lock shaft 300, and the two upper and lower rims 10 and 20 in the embodiment. The “holding unit” is a spindle housing 11 in the embodiment.
0, the bar spring 102, the bar member 104, and the base 50. Further, the “vibration restricting means” includes the vibration restricting cylinder 190, the pressing member 192, and the concave portion 19 in the embodiment.
4 is supported. However, none of them are limited to the components in the embodiment, and various design changes are possible.

[0041]

As described above, according to the tire uniformity and dynamic balance test apparatus of the present invention, the tire is held firmly to perform the uniformity test, and the tire is vibrated and held. A balance test can be performed. Therefore, it is possible to perform the uniformity test and the dynamic balance test with one device, and it is possible to save the installation space and reduce the cost.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a uniformity and dynamic balance testing device for a tire according to an embodiment.

FIG. 2 is a plan view of the test apparatus of FIG.

FIG. 3 is a side sectional view showing a spindle of the test apparatus of FIG. 1;

FIG. 4 is a side sectional view showing an inserter unit of the test apparatus of FIG. 1;

FIG. 5 is a sectional view showing a support structure of the spindle housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite measuring device 10 Lower rim 20 Upper rim 30 Rotary drum 50 Base 60 Elevating housing 100 Spindle 110 Spindle housing 190 Vibration control cylinder 192 Pressing member 194 Depression 200 Inserter unit 222 Chuck 260 Rotary joint 300 Lock shaft

Claims (5)

[Claims] A rotation support member configured to hold and rotate the tire; a holding unit configured to hold the rotation support member so as to be able to vibrate in a predetermined direction; a vibration control unit configured to control vibration of the rotation support member; A dynamic balance test means for measuring the dynamic balance of the tire by rotating a rotary support member, and rotating the rotary support member with a rotating drum pressed against the tire to measure the uniformity of the tire A uniformity test means, and a vibration regulation means restricts the vibration of the rotation supporting member during the uniformity test, and releases the regulation by the vibration restriction means during the dynamic balance test to release the rotation supporting member. A combined tire uniformity and dynamic balance testing device configured to enable vibration. 2. The apparatus according to claim 1, wherein the holding means includes: a housing for rotatably holding the rotation support member; and an elastic member provided between the housing and the apparatus main body. The combined uniformity and dynamic balance test apparatus for a tire according to claim 1. 3. A chuck mechanism for chucking the rotation support member on a side opposite to the holding member with the tire interposed therebetween, wherein the chuck mechanism chucks the rotation support member during a uniformity test, and The combined uniformity and dynamic balancing test apparatus for a tire according to claim 2, wherein the chuck is released during a balancing test. 4. The chuck mechanism is provided at one end of a rotatable shaft member provided on an extension of a rotation shaft of the rotation support member, and when the rotation support member rotates, the shaft member is also driven. The tire uniformity and dynamic balance combined test apparatus according to claim 3, wherein the apparatus is configured to rotate. 5. A combined tire uniformity and dynamic balance test apparatus configured to perform both a tire uniformity test and a dynamic balance test.