JPH0724603U - Multi-tiered rim - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a multistage rim from which a test tire can be easily removed. A second cylinder 28 is provided on the outer circumference of the first cylinder 16 so as to be slidable in the axial direction, and a third cylinder 30 is provided on the outer circumference of the second cylinder 28 so as to be slidable in the axial direction. , The third cylindrical body 3
The multi-stage rim 14 is configured by providing the fourth cylindrical body 32 on the outer peripheral side of 0 so as to be slidable in the axial direction. The test tire 70 is supported by a step obtained by shifting the first cylindrical body 16, the second cylindrical body 28, the third cylindrical body 30, and the fourth cylindrical body 32 in the axial direction. Cylinder 40 is used to remove the
The cylinder body 16, the second cylinder body 28, and the third cylinder body 30 are moved inward of the fourth cylinder body 32. As a result, the test tire 70 in close contact with the step can be easily removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-stage rim capable of mounting tires of a plurality of sizes, and particularly to a multi-stage rim suitable for a tire characteristic measuring machine for measuring the dimension, shape, uniformity and the like.

[0002]

[Prior art]

 As a rim used for a tire characteristic measuring machine such as tire size, shape, and uniformity, a multi-stage rim capable of mounting tires of different sizes has been proposed.

This kind of multi-stage rim is provided with a plurality of step portions of different sizes each having a rim surface and a flange surface on the outer peripheral surface so that tires of different sizes can be mounted. It is configured.

[0004]

[Problems to be solved by the device]

 With conventional multi-stage rims, a large amount of interference between the tire and the rim base is used to make the mounting state of the tire on the multi-stage rim during tire characteristics measurement closer to the mounting state of the tire on the rim during actual driving. Was there.

However, by taking a large amount of interference between the tire and the rim base, the following problems occur when the tire is removed from the rim base after the measurement is completed.

That is, in the tire characteristic measuring machine, the test tire is mounted on the multi-stage rim by supporting the test tire with the split body of the multi-stage rim from the left and right. After the completion, when pulling the multi-tiered rim split body back and forth to remove the tire, make sure that the tire is in close contact with either one of the multi-tiered rim split bodies that is pulled back to the left or right due to the interference between the tire and the rim base. In some cases, it was necessary for the operator to remove the tire that was still in close contact with one side by himself after pulling back the split body of the multi-stage rim to the left and right. Particularly, in the case of a tire having a large load or a large size (for example, a tire for a construction vehicle), the work is dangerous and the work efficiency is deteriorated.

In view of the above facts, the present invention has an object to provide a multistage rim from which a test tire can be easily removed.

[0008]

[Means for Solving the Problems]

 The present invention provides a plurality of bead seat portions having different diameters for supporting a bead base portion of a test tire, and a plurality of bead seat portions provided corresponding to the respective bead seat portions for supporting an outer surface of the bead portion of the test tire. An axially dividable multi-stage rim having a plurality of side surface support portions, wherein the bead seat portion and the side surface support portions are relatively moved in the axial direction by a drive means. It has a feature.

[0009]

[Action]

 Since the multi-stage rim of the present invention is provided with a plurality of bead seat portions having different diameters and the side support portions corresponding thereto, it is possible to mount tires of different sizes with one multi-stage rim. Also, since the multi-stage rim of the present invention can be divided in the axial direction, it is easy to attach and detach the tire.

Further, when the tire does not separate from one of the multi-stage rims which is divided due to the interference between the bead base portion of the tire and the bead seat portion of the multi-stage rim, the bead is driven by the driving means. The seat portion and the side surface supporting portion are relatively moved in the axial direction. As a result, the bead base part that was in close contact with the bead seat part is released, and the tire can be easily removed.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a tire characteristic tester 12 having a multi-stage rim 14 of the present invention.

As shown in FIG. 1, the multistage rim 14 is divided in the axial direction. One side 14A of the multi-stage rim 14 on the right side of FIG. 1 is provided with a small-diameter first cylindrical body 16 whose axial direction is horizontal. One side of a hollow rotating shaft 18 penetrates and is fixed to the axis of the first cylindrical body 16. A spline (not shown) is formed on the outer periphery of the rotary shaft 18 from the middle portion in the longitudinal direction to the other side. The rotary shaft 18 is moved from the floor surface 24 through a support ring 20 having an inner groove (not shown) that engages with the spline in the vicinity of one side of the middle and the other side, and a bearing 22 provided on the outer peripheral surface of the support ring 20. It is supported by upright columns 26. As a result, the rotary shaft 18 is rotatable along with axial movement.

As shown in FIGS. 1 and 2, a second cylindrical body 28 is coaxially provided on the outer peripheral side of the first cylindrical body 16. The second cylindrical body 28 is slidable in the axial direction with respect to the first cylindrical body 16. A protrusion 16A is provided on the outer periphery of the first cylindrical body 16, and the protrusion 16A is inserted into an axially extending groove 28F formed on the inner peripheral surface of the second cylindrical body 28, whereby the second cylindrical body is formed. 28 and the first cylindrical body 16 rotate integrally.

A third cylindrical body 30 is coaxially provided on the outer peripheral side of the second cylindrical body 28. The third cylindrical body 30 is axially slidable with respect to the second cylindrical body 28. A protrusion 28A is provided on the outer periphery of the second cylindrical body 28, and the protrusion 28A is inserted into an axially extending groove 30C formed on the inner peripheral surface of the third cylindrical body 30. 28 and the third cylindrical body 30 rotate integrally.

Further, a fourth cylinder 32 is coaxially provided on the outer peripheral side of the third cylinder 30. The fourth cylindrical body 32 is slidable in the axial direction with respect to the third cylindrical body 30. A protrusion 30A is provided on the outer circumference of the third cylindrical body 30, and the protrusion 30A is inserted into an axially extending groove 32A formed on the inner peripheral surface of the fourth cylindrical body 32, whereby the fourth The cylindrical body 32 and the third cylindrical body 30 rotate integrally.

As shown in FIG. 1, a ring 34 is fixed to the rotating shaft 18 at an intermediate portion where a spline is formed, and a large-diameter ring 38 is attached to the outer circumference of the ring 34 via a bearing 36. It is supported. A cylinder 40 as a driving means is arranged between the columns 26 in parallel with the rotary shaft 18, and the tip of a piston rod 42 of the cylinder 40 is fixed to a large diameter ring 38. The cylinder 40 is fixed to the upper part of a pillar 44 standing on the floor 24.

An annular plate 46 is fixed to the inner periphery on the right side of FIG. 1 of the fourth cylindrical body 32, and the inner peripheral surface of the annular plate 46 is coaxially arranged on the outer peripheral side of the rotary shaft 18. One of the large diameter hollow shafts 48 is fixed.

An intermediate portion of the hollow shaft 48 is rotatably supported by a pair of bearings 52 attached to a column 50 standing on the floor 24.

A large pulley 54 is fixed to the other side of the hollow shaft 48. A small pulley 58 attached to a rotary shaft 56A of a motor 56 is arranged below the large pulley 54, and a belt 60 is stretched between the large pulley 54 and the small pulley 58.

As shown in FIG. 2, the outer peripheral surface of the first cylindrical body 16 on the left side of FIG. 2 is tapered, and forms a bead seat portion 16B with which the bead base portion 70A of the test tire 70 is in close contact.

A step portion 28B is formed on the left side of the second cylindrical body 28 in FIG. 2, and the outer peripheral surface of the step portion 28B on the right side of FIG. 2 is tapered. Approximately half is a bead seat portion 28C with which the bead base portion of the test tire is in close contact, and approximately half on the opposite side is an engaging portion 28D with which an annular detachable flange 62, which will be described later, engages. Further, an end surface 28E of the second cylindrical body 28 as a side surface supporting portion on the left side in FIG. 2 corresponds to a rim flange of a wheel, and is a portion where the bead portion outer surface 70B of the test tire 70 is in close contact.

The outer peripheral surface on the left side of FIG. 2 of the third cylindrical body 30 is a bead seat portion 30B with which the bead base portion of the test tire is in close contact.

The end surface 32B of the fourth cylindrical body 32 as the side surface supporting portion on the left side in FIG. 2 corresponds to the rim flange of the wheel, and is a portion where the bead portion outer surface 70B of the test tire 70 is in close contact.

In the detachable flange 62, the side wall 62A on the right side of FIG. 2 is in close contact with the end surface 30D of the third cylindrical body 30, and the inner peripheral surface 62B is in close contact with the engaging portion 28D of the second cylindrical body 28. The side wall 62C comes into close contact with the bead portion outer surface 70B of the test tire 70.

In this embodiment, the rim diameter D1 of the third cylindrical body 30 is 51 inches, the rim diameter D2 of the second cylindrical body 28 is 45 inches, and the rim diameter D3 of the first cylindrical body 16 is 35 inches. ． Further, the height H1 of the end surface of the fourth cylindrical body 32 is 4.5 or 5.0 inches, and the radial thickness H2 of the detachable flange 62 (corresponding to the rim flange height of a normal wheel) is 4. The height H3 of the end surface 28E of the second cylinder 28 is 3.0, 3.5, 4. Any one of 0 is adopted.

It should be noted that one end of a hose 66 is connected to the right end of the rotary shaft 18 via a rotary joint 64, and the other end of the hose 66 is connected to an air compressor (not shown).

The other side 14B of the multi-stage rim 14 on the left side of FIG. 1 has a symmetrical shape with one of the multi-stage rims 14 described above, and is different in that the rotating shaft 18 is solid and is not rotated by the motor 56. The columns 26, 44, and 50 are fixed to the slide base 68 so that they can move along the axial direction.

When the piston rod 42 is extended, as shown in FIGS. 1 and 2, the protrusion 16 A of the first cylindrical body 16 is attached to one end of the groove 28 F of the second cylindrical body 28, and The protrusion 28A of the cylindrical body 28 abuts on one end of the groove 30C of the third cylindrical body 30, and the protrusion 30A of the third cylindrical body 30 abuts on one end of the groove 32A of the fourth cylindrical body 32. 16, the second cylindrical body 28, and the third cylindrical body 30 project from the fourth cylindrical body 32. Further, as shown in FIG. 3, when the piston rod 42 is contracted, the projection 16A of the first cylindrical body 16 is attached to the other end of the groove 28F of the second cylindrical body 28, and The protrusion 28A contacts the other end of the groove 30C of the third cylindrical body 30, and the protrusion 30A of the third cylindrical body 30 contacts the other end of the groove 32A of the fourth cylindrical body 32, respectively. The second cylindrical body 28 and the third cylindrical body 30 are housed inside the fourth cylindrical body 32.

Next, a procedure and an operation of mounting the test tire 70 on the tire characteristic tester 12 will be described.

As a preparation for mounting the test tire 70 on the tire characteristic testing machine 12, the piston rod 42 is extended as shown in FIG. 1, and the first cylindrical body 16, the second cylindrical body 28, and the third cylindrical body are 30 is projected from the fourth cylindrical body 32, and the slide base 68 is moved to secure a space for disposing the test tire 70 between the one side 14A and the other side 14B of the multistage rim 14.

When the rim diameter of the test tire 70 to be mounted is 51 inches or 35 inches, the attachment / detachment flange 62 is removed, and the test tire 70 is positioned coaxially between the one side 14A and the other side 14B of the multistage rim 14. Then, the slide base 68 is moved to the one side 14A of the multi-stage rim 14 to sandwich the test tire 70 between the one side 14A and the other side 14B of the multi-stage rim 14. Here, when the rim diameter of the test tire 70 is 51 inches, the bead portion of the test tire 70 is supported by the end surface 32B of the fourth cylindrical body 32 and the bead seat portion 30B of the third cylindrical body 30, and 35 inches In this case, the bead seat portion 16B of the first cylindrical body 16 and the end surface 28E of the second cylindrical body 28 support the bead portion of the test tire 70.

On the other hand, when the rim diameter of the test tire 70 is 45 inches, as shown in FIG. 2, the attachment / detachment flange 62 is attached to the engaging portion 28D of the second cylindrical body 28 to sandwich the test tire 70. . In the 45-inch test tire 70, the bead base is supported by the bead seat portion 28C of the second cylindrical body 28, and the tire width direction outer side portion of the bead portion is supported by the side wall 62C of the detachable flange 62.

When the test tire 70 is mounted, the test tire 70 is filled with air from a compressor (not shown) through the hose 66, the rotary joint 64, and the rotary shaft 18, whereby the test tire 70 is ready for the test. .

After the test is finished, the air inside the test tire 70 is released to the atmosphere, the slide base 68 is moved in the direction away from the one 14A of the multistage rim 14, and the test tire 70 is removed.

Here, due to the interference between the bead portion of the test tire 70 and the multi-stage rim 14, the test tire 70 may be stuck to one of the multi-stage rims 14A or 14B and cannot be separated. In such a case, the piston rod 42 of the cylinder 40 on the closely contacted side is contracted to move the first cylindrical body 16, the second cylindrical body 28, and the third cylindrical body 30 in the axial direction as shown in FIG. Let

As a result, the bead portion of the test tire 70 separates from the bead seat portion, and the test tire 70 can be removed from the multistage rim 14. In particular, when the test tire 70 is a large tire for construction vehicles, the tire size and weight are large, and it is not only difficult to manually remove the test tire 70 that is in close contact with the multistage rim 14, but it is also dangerous. However, by moving the first cylindrical body 16, the second cylindrical body 28, and the third cylindrical body 30 in the axial direction as described above, dangerous work can be eliminated and the work can be made lighter. it can. In addition, it is possible to easily remove even a tire with a large interference.

Even when the detachable flange 62 is difficult to remove from the engaging portion 28D of the second cylindrical body 28, the detachable flange 62 can be similarly detached.

Although the multi-stage rim 10 of the present embodiment is configured to be able to support tires of three different rim sizes, the present invention is not limited to this, and as the number of cylinders is further increased, the detachable flange By increasing the number of tires, more tires with different rim sizes can be mounted without changing the rims.

Further, in the present invention, three types of tires having rim diameters of 45, 51 and 57 inches are configured to be mounted. However, by changing the dimensions of each step portion and the detachable flange, tires other than the above rim diameters can be mounted. Needless to say, it may be possible to mount.

[0041]

[Effect of device]

 As described above, since the multi-stage rim of the present invention has the above-mentioned structure, it has an excellent effect that the test tire can be easily removed.

[Brief description of drawings]

FIG. 1 is a side view of a tire characteristic testing machine 12 having a multistage rim according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a multi-stage rim.

FIG. 3 is a side view of the tire characteristic testing machine 12 showing a state in which a first cylindrical body 16, a second cylindrical body 28, and a third cylindrical body 30 are housed inside a fourth cylindrical body 32.

FIG. 4 is a cross-sectional view of essential parts of the multistage rim showing a state in which a first cylindrical body 16, a second cylindrical body 28, and a third cylindrical body 30 are housed inside a fourth cylindrical body 32.

[Explanation of symbols]

 14 multi-stage rim 16B bead seat part 28C bead seat part 28E end face (side support part) 30B bead seat part 32B end face (side support part) 40 cylinder (driving means) 70 test tire 70A bead base part 70B bead part outer surface

Claims (1)

[Scope of utility model registration request] 1. A plurality of bead seat portions having different diameters for supporting a bead base portion of a test tire, and a plurality of bead seat portions provided corresponding to each of the bead seat portions and supporting an outer surface of a bead portion of the test tire. Is a multi-stage rim that is capable of being divided in the axial direction and that has a side support part thereof, wherein the bead seat part and the side support part are relatively moved in the axial direction by drive means. .