JP3163448B2 - Table rotating device in tire load testing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table rotating device in a tire load testing machine, and more particularly, to a highly accurate tire capable of rotating a load table smoothly and maintaining a horizontal state when a load is applied. The present invention relates to a table rotating device in a tire load tester capable of testing lateral rigidity and circumferential rigidity.

[0002]

Generally, in order to test the lateral stiffness and the circumferential stiffness of a test tire with one load table in a tire load test machine, it is necessary to turn the test tire 90 ° in a horizontal state with the load table. That is, in the conventional tire load testing machine, as shown in FIG. 8, a table 3 is horizontally installed on a machine base 1 via a plurality of (four in this embodiment) guide rods 2. A first load table 4 is horizontally rotatably mounted via a plurality of steel ball balls (not shown).
A second load table 6 slidable in the front-rear direction via the linear guide 5 and the slide member 6 is provided on the upper side. On the load table 6, a tire rotating shaft 8 which can be moved up and down along a guide member 7 is provided horizontally, and a test tire mounted on the load table 6 with a load applied thereto at its tip. W is to be installed.

Then, the test tire W is loaded on the load table 6 with a constant load, and the first load table 4
And the second load table 6 are moved back and forth, and the lateral stiffness of the tire is measured by a compression-type load cell 9, and
By rotating the first load table 4 and the second load table 6, the circumferential rigidity is measured by the load cell 9.

[0004]

However, in the above-described tire load testing machine, when the load test load becomes large, a plurality of intervening members are provided between the table 3 and the first load table 4. The steel ball is deformed, and the load tables 4 and 6 are inclined and cannot maintain a horizontal position. As a result, there is a problem that it is impossible to measure the lateral rigidity and the circumferential rigidity of the test tire with high accuracy.

The present invention has been devised in view of such a conventional problem, and enables a load table to be smoothly rotated, maintains a horizontal state when a load is applied, and allows the load table and a tire rotating shaft to rotate. It is an object of the present invention to provide a table rotating device in a tire load testing machine which can measure the lateral rigidity and the circumferential rigidity of a test tire with high accuracy at all times.

[0006]

In order to achieve the above object, the present invention has a radial bearing installed at the center of a table and a plurality of steel ball balls which can move up and down via a spring around the radial bearing. Arranged at intervals,
The table and the first load table are mounted on the outer periphery of the steel ball.
A ring-shaped table receiving member having high rigidity for keeping the cable parallel to the table, and positioning pins that can be inserted into the table and the first load table at predetermined intervals in a circumferential direction. Then, the first pin is attached to each of the positioning pins .
The gist of the present invention is that a load table retraction means is provided.

[0007]

SUMMARY OF THE INVENTION The present invention is constructed as described above, the
When the first and second load tables are inverted by 90 °, a plurality of vertically movable steel ball balls and a radial bearing are used to smoothly turn while maintaining the horizontal state, and the first load table is moved relative to the table. High rigidity to keep
Since the have close contact with the retraction mechanism and the positioning pin through a ring-shaped table receiving member, first and second load table remaining parallel and tire rotation axis of the test tires, always and lateral rigidity of the highly accurate test tires It can measure the circumferential stiffness.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a front view of a table rotating device 10 embodying the present invention. On a table 3, a radial bearing 11 is disposed at the center of the table 3 as shown in FIG. A plurality of steel ball balls 13 which can be moved up and down through the steel ball balls 13 are arranged at predetermined intervals, and are formed in a ring shape on the outer periphery of the steel ball balls 13 as shown in FIG. A high and highly accurate table receiving member 14 is provided.

A first load table 15 (rigid table) is provided on the radial bearing 11, the steel ball 13, and the table receiving member 14. On the first load table 15, the linear guide 5 and the Slide member 6
A second load table 16 (rigid table) is installed via a moving member composed of: a positioning pin 17 that can be inserted into the table 3 and the first load table 15 at two locations in the circumferential direction at a predetermined interval. It is arranged.

As shown in FIGS. 5 and 6 , the positioning pin 17 has a rectangular through hole 18 formed on the side surface of the tip 17a of the positioning pin 17, and this through hole 18 has
First load table 1 fixed to the lower surface of table 3
5 retraction means 19 are attached. The retracting means 19 includes a wedge-shaped retracting member 20 that can be inserted into the through hole 18 and a cylinder 21 that moves the retracting member 20 forward and backward.

Therefore, as shown in FIG. 4, the positioning pins 17 are inserted through through holes (not shown) formed in the table 3 and the first load table 15, respectively .
As shown in FIG.
8, the first load table 15 is pulled downward by inserting the wedge-shaped pull-in member 20 of the pull-in means 19 through the ring-shaped table receiving member 14 having high rigidity.
And is fixed in close contact with the table 3.

With the above configuration, the first and the second
When the two load tables 15 and 16 are inverted by 90 °, the plurality of vertically movable steel ball balls 13 and the radial bearing 11 can be smoothly turned while maintaining the horizontal state. First load table 1
5 is provided with a positioning pin 17 and a pull-in means 1 via a ring-shaped rigid and highly accurate table receiving member 14.
9, the first and second load tables 1
5 and 16 maintain the horizontal state when the test tire W is loaded
It is possible to measure the lateral rigidity and the circumferential rigidity of the test tire with high accuracy at all times while keeping parallel to the tire rotation axis 8.

[0013]

According to the present invention, the radial bearing is installed at the center of the table as described above, and a plurality of steel ball balls which can move up and down via a spring are arranged around the radial bearing at predetermined intervals. And on the outer circumference of this steel ball ball,
Keep the table and the first load table parallel
A ring-shaped table receiving member having high rigidity , and positioning pins that can be inserted into the table and the first load table are disposed at a predetermined interval in a circumferential direction, and each of the positioning pins is In addition, since the first load table retraction means is provided, the following excellent effects can be obtained.
Things. (1) With the test tire mounted, the first and second load
When turning the cable 90 °, use the spring
With multiple movable steel ball balls and radial bearings
You can turn smoothly while maintaining the level
To prevent uneven wear of the radial bearing
You. (2) The first load table is fixed in close contact with the table via the highly rigid ring-shaped table receiving member.
To be, under a load to the test tire with can maintain the horizontal state, so maintain the parallel between the first and second load table and the tire rotation shaft, the lateral stiffness and circumferential stiffness at all times highly accurate test tires Can be measured .

[Brief description of the drawings]

FIG. 1 is a front view of a table rotating device embodying the present invention.

FIG. 2 is a plan view of a table.

FIG. 3 is a plan view of a ring-shaped table receiving member.

FIG. 4 is a front view of a state where the table rotating device is assembled.

FIG. 5 is a partially cutaway front view of a positioning pin.

FIG. 6 is an explanatory diagram showing a relationship between a positioning pin and a retracting unit.

FIG. 7 is an explanatory view showing a state in which a retracting member of a retracting means is engaged with a positioning pin.

FIG. 8 is an explanatory view of a conventional tire load testing machine.

[Explanation of symbols]

Reference Signs List 10 Table rotating device 11 Radial bearing 12 Spring 13 Steel ball ball 14 Table receiving member 15 First load table 16 Second load table 17 Positioning pin 18 Through hole 19 Retraction means 20 Wedge-shaped retraction member 21 Cylinder W Test tire

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-292905 (JP, A) JP-B-53-43430 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 17/02

Claims (1)

(57) [Claims] [Claim 1] established a 90 ° inversion first load table capable via a plurality of steel balls balls on the table, the first
1 to be able to move in the axial direction of the tire on the load table
A second load table is provided, and the test load is moved by moving the second load table in the axial direction of the tire while a test tire loaded with the load is placed on the second load table. In a table rotating device in a tire load testing machine for testing the lateral rigidity and circumferential rigidity of the tire, while installing a radial bearing at the center of the table,
A plurality of steel ball balls that can move up and down via a spring are disposed around the steel ball ball at a predetermined interval.
A ring-shaped table receiving member having high rigidity for keeping in a row is disposed, and positioning pins that can be inserted into the table and the first load table are disposed at predetermined intervals in a circumferential direction, and A table rotating device in a tire load testing machine, wherein each positioning pin is provided with a means for retracting the first load table.