JP3045449B2 - Sliding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding device for pressing a friction pad against a rotating disk material such as a pinion disk friction and wear tester, a friction disk brake of an automobile or the like.

[0002]

2. Description of the Related Art As a friction and wear tester, as shown in FIG. 2, a rotary table 33 for mounting and fixing a disk material 32 is provided at the upper end of a rotary drive shaft 31.
Support 3 for mounting and fixing friction pad 34 above
The pad support 35 is attached to the lower end of a pressing shaft 36 having an axis extending from the axis of the rotary drive shaft 31, and the lower surface of the friction pad 34 is attached to the upper surface of the disk material 32. The disc member 32 is pressed against the disc material 32 by bringing the friction pad 34 into contact with the disc material 32 by rotating the rotary table 33 and applying a load axially downward to the pressing shaft 36. There is one that slides on the lower surface.

A universal ball 37 is provided between the pad support 35 and the pressing shaft 36, and the pad support 35
Is the pad support 35 with respect to the pressing shaft 36,
7 is attached so as to be freely tilted around the center thereof, so that the friction pad mounting surface side of the pad support 35 is parallel to the upper surface of the disk material 32.

[0004]

As in the prior art described above, the contact surface 34a of the friction pad 34 and the contact surface 32a of the upper surface of the disc material 32 can be formed only by the tilting operation of the pad support 35 around the center of the universal ball 37. In some cases, it is difficult to make the surface contact completely, and the contact surface 34a of the friction pad may be slightly inclined with respect to the contact surface 32a of the disk material 32. If the contact surface 34a of the friction pad is inclined by about 0.1 mm with respect to the contact surface 32a of the disc material 32, the friction pad 34 comes into contact with the contact surface 32a of the disc material 32, and the edge portion of the friction pad 34 Therefore, there is a problem that the contact surface 32a of the disk material 32 is damaged.

In view of the above problems, an object of the present invention is to provide a sliding device capable of absorbing the inclination (dimensional error) of a contact surface of a friction pad with respect to a contact surface of a disk material.

[0006]

The technical means taken by the present invention to achieve the above object is to fix a disk material on a rotating body and to dispose the disk material opposed to the disk material in the rotation axis direction. With a rotating body, at the center of this non-rotating body,
In addition to providing a holder with a spherical seat,
On the mounting body, which is arranged facing away with an interval of
A holder having opposing spherical seats is provided, and
A free sphere is installed on the ball, and the non-rotating body is tilted around the center of the free sphere.
The non-rotating body is attached to the mounting body so as to allow operation, a plurality of friction pads are provided at predetermined portions of the surface of the non-rotating body facing the disk material , and the friction pad is connected to the pad mounting portion of the non-rotating body. A universal ball is provided therebetween, and the friction pad is mounted on the pad mounting portion so that the contact surface of the friction pad tilts around the center of the universal ball with respect to the contact surface of the disk material, and the friction pad is driven to rotate. Disk material
The point is to press it .

[0007]

When the friction pad is pressed against the disk material driven in rotation, the contact surface of the friction pad with respect to the contact surface of the disk material is about the center of a free sphere provided between the pad mounting portion and the friction pad. The friction pad is tilted to correct the inclination of the contact surface of the friction pad with respect to the contact surface of the disc material, and the dimensional error is absorbed, the friction pad makes good surface contact with the disc material, and the disc material comes into contact with one of the friction pads Surface damage is prevented.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of a main part of a pinion disk friction and wear tester. In the figure, reference numeral 1 denotes a drive shaft having a vertical axis, supported by a frame so as to be rotatable around the axis, and a drive device. Thus, it is driven to rotate around the axis. A rotary table (rotary body) 2 is attached and fixed to the upper end of the drive shaft 1 so as to be integrally rotatable, and a disk material 3 is mounted and fixed to the upper surface of the rotary table 2 so as to be able to rotate integrally.

The upper surface of the disk 3 is formed flat. A disc-shaped pad support (non-rotating body) 4 is disposed above the disk material 3 so as to face each other.
A holder 6 having an open spherical seat 5 is provided upward. Above the pad support 4, a disk-shaped mounting body 9 fixed by a plurality of bolts 8 to the lower end of a pressure shaft 7 arranged in the up-down direction is arranged to face at a slight interval. A holder 1 having a spherical seat 10 which is open downward and is opposed to the spherical seat 5 at the center of the mounting body 9.
A free ball 12 is provided between the spherical seats 5 and 10, and the free ball 12 is in sliding contact with the spherical seats 5 and 10.

The pad support 4 is arranged at equal intervals on the same circumference, and is provided with a plurality of bolts 13 penetrating the pad support 4 from below. It is attached to the attachment body 9 so as to allow a tilting operation around. The pressure shaft 7 has an axis extending from the axis of the drive shaft 1 and is non-rotatably mounted on the frame so that a load can be applied downward from above in the axial direction. A plurality of block-shaped friction pads 14 are provided on the outer circumference of the pad support 4 at equal intervals on the same circumference. The lower surface of the friction pad 14 is formed as a flat surface.

A pad mounting member 15 is mounted and fixed to each of the friction pad 14 mounting portions of the pad support 4. The pad mounting member 15 is composed of a main body 16 and a pressing member 17. An opening-shaped mounting groove 18 is formed in the lower central portion of the main body 16 below and radially outward of the pad support 4.
4 is inserted from the radially outer side of the pad support 4, and then the pressing member 17 is brought into contact with the friction pad 14, and the bolt 19 is inserted through the pressing member 17 and screwed into the main body 16. By attaching the holding member 17 to the main body 16 by using the friction pad 14, the pad attaching member 15
Is to be held.

The head of the bolt 19 and the holding member 1
7, a spring washer 20 is interposed, and the friction pad 14 is pressed and held by the spring force of the spring washer 20, and the friction pad 14 opposes the spring force of the spring washer 20. Mounted for movement. Main unit 1
A holder 22 having an open spherical seat 21 is provided above the mounting groove 18 of FIG.
A hemispherical free sphere 23 is provided between the spherical seat 21 and the friction pad 14. The spherical surface of the universal ball 23 is in sliding contact with the spherical seat 21, and the flat surface of the universal ball 23 is
Are slightly protruded from the friction pad 14 and are in contact with the friction pad 14.
Of the friction pad 14 with respect to the contact surface 3a of the disc material 3 by sliding along the spherical surface of
The inclination of a is corrected so that the friction pad 14 makes good surface contact with the disk material 3.

The following table shows the results of the measurement of the amount of wear on the disk material contact surface after tests were conducted with the above-described embodiment and a conventional friction and wear tester. In the table, A-A ', B-
B ′ and CC ′ indicate measurement points, and as shown in FIG. 3, three positions on the disk material contact surface that are equally spaced in the circumferential direction. The numerical values of the wear amount are between A-A ', BB
And the maximum value between C ′ and C ′. Furthermore, the difference is C
9 shows a comparison between −C ′ and other measurement points.

[0014]

[Table 1]

[0015]

According to the present invention, a free sphere is provided between the pad mounting portion of the non-rotating body and the friction pad, and the contact surface of the friction pad with respect to the contact surface of the disk material is about the center of the free sphere. Since the friction pad is attached to the pad mounting portion so that the friction pad performs a tilting operation, the contact surface of the friction pad tilts around the center of the universal ball with respect to the contact surface of the disc material, and the friction pad contacts the disc material. The inclination of the contact surface can be corrected to absorb the dimensional error, so that the friction pad can make good surface contact with the disc material, and the contact surface of the disc material can be prevented from being damaged due to one side of the friction pad.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a pinion disk friction and wear tester.

FIG. 2 is a schematic side sectional view of a friction and wear tester showing a conventional example.

FIG. 3 is a cross-sectional plan view and a side view of a disk material showing a measurement point of a wear amount of a disk material contact surface and the like.

[Explanation of symbols]

 2 rotating table (rotating body) 3 disk material 4 pad support (non-rotating body) 14 friction pad 23 free ball

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-252937 (JP, A) JP-A 62-96552 (JP, U) JP-A-5-3980 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) G01N 3/00-3/62

Claims (1)

(57) [Claims] 1. A non-rotating member having a disk fixed on a rotating member and opposed to the disk in a direction of a rotation axis.
A holder having a spherical seat at the center of the non-rotating body.
And at a slight distance from the non-rotating body
The mounted mounting body has a spherical seat facing the spherical seat.
And a free sphere is provided between the two spherical seats.
To allow the tilting motion of the rotating body around the center of the universal sphere
To, attaching a non-rotating member to the mounting member, the non-rotating member disk material
A plurality of friction pads at specified locations on the surface facing
In addition , a free ball is provided between the pad mounting portion of the non-rotating body and the friction pad, and the frictional contact is performed so that the contact surface of the friction pad tilts around the center of the free ball with respect to the contact surface of the disk material. Attach the pad to the pad mounting part, and
Press the pad against the rotating disk.
A sliding device.