JPH0670447B2 - Friction joint mechanism and friction brake and clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a brake and a clutch that have a special hub structure and can be easily inspected.

[Prior Art] US Patent Application No. 095,102 discloses a dual disc brake or clutch in which a friction pad can be easily attached and detached. Other devices for rapid brake shoe replacement are shown in U.S. Pat. Nos. 3,388,755 and 3,885,650. The desire for easy removal and replacement of worn friction material was accepted.

It is well known that the use of replaceable parts for brakes and clutches is preferred, as shown for example in US Pat. No. 3,964,583.

Single Disc Single Acting Brake or Clutch Incorporating one or more pneumatically actuated piston and cylinder assemblies to press friction material against the body supporting the piston and cylinder assemblies into contact with the rotatable disc To do.

When operating as a brake, the fixed body and the rotating body are engaged to stop the operation. When actuating as a clutch, the two bodies are actuated together during engagement.

The present invention provides a novel hub that can be used for either brakes or clutches, thus reducing the need for replacement parts inventory. It is also an object of the present invention to provide a friction coupling mechanism in which the exact same piston and cylinder assembly, disc and mounting spider can be used in either the brake or clutch.

[Means for Solving the Problems] In the present invention, at least one of the piston and cylinder assembly is mounted on a spider. In the case of a brake, the spider is fixed to a machine frame.
In the case of a clutch, the spider is attached to the rotary shaft.

ACTION In either case, the friction material carried on the outer surface of the piston is moved in operation by engaging opposing discs, preferably finned for heat dissipation.

The central hub of the assembly can be used as a brake in one position and in a clutch in the other position. As a clutch, add an adapter, bearing, and adapter fastener to the drive system.

These simplifications provide economic convenience as well as easy removal of the friction material and allow replacement of parts.

One or more piston and cylinder assemblies having a disk-shaped cylinder base plate are mounted on the spider by screws. These piston and cylinder assemblies include hollow cylindrical torque posts extending from the cylinder base plate and attached by removable screws. The torque post holds a substantially disc-shaped pad made of friction material in place, and when the torque post is removed, the friction pad is slid radially outward so that the pad can be removed.

Pressurized air flows through it into the cylinder to actuate the piston, remove the air fittings, and remove the mounting screws, allowing the piston and cylinder assembly, including the cylinder base plate, to be removed for maintenance. .

The friction material pad faces the finned disc and when pressurized air is forced into the cylinder, the pad is pressed to engage a brake or clutch. Relieving the air pressure causes the friction material to retract and disengage.

The mechanism acts as a brake when the central hub of the mechanism is mounted on the rotating shaft and the spider is mounted on the machine frame. When the hub position is reversed and the hub is attached to the spider, the sprocket adapter mounts the finned disc on the drive shaft, which acts as a clutch. When engaged, the drive shaft rotates the hub, which in turn rotates the finned disc, and the spider rotates with the hub.

In this way, the device can function either as a brake or as a clutch because of this reversible hub.

[Embodiment] FIGS. 1 and 2 show a brake according to the present invention.
The two piston and cylinder assembly 10 is attached via the cylinder base plate 11 to the cylinder mounting plate or spider 12 with mounting screws 13. Although the piston and cylinder assembly is shown as six in FIG. 1, more than six or larger can be used. In the preferred embodiment shown, two screws 13 secure each piston and cylinder assembly 10 to the spider 12. The cylinder mounting plate or spider 12 is also secured to a machine frame (not shown) by reaction force receiving bolts 14 which pass through slots 15 in the perimeter of the spider 12 in the brake configurations of FIGS. To do.

Each piston and cylinder assembly 10 includes a cylinder base plate 11, a diaphragm type piston assembly 16 as shown, an annular piston collar 17 and a cylindrical torque post.
18 (two per piston / cylinder assembly) and a removable torque post screw 19 to help attach the torque post 18 to the cylinder base plate 11, the base plate 11 being attached to the spider 12 by means of attachment screws 13. The torque post 18 extends from the piston collar 17 through a slot 20 in the periphery of a pad 21 of friction material and, when engaged with a friction disc 22, the disc.
The 22 is frictionally engaged with the spider 12, and thus the machine frame, to stop or control the relative rotation of the parts. The friction disc 22 is preferably finned as shown to measure the dissipation of heat generated in engagement with the brake.

All of the parts described so far are reaction force receiving bolts.
Except for 14, it is also present in the clutch configuration of the mechanism shown in FIGS. 3 and 4. 2 and 4 show an air fitting 23 by means of which pressurized air is introduced into the cylinder of the piston and cylinder assembly 10 to engage the friction pad 21 outwardly with the friction disc 22. To move. Hydraulically actuating the piston and cylinder assembly is also possible to those skilled in the brake and clutch arts.

The central hub 24 is a substantially cylindrical body having an annular flange at one end. In the brake configuration shown in FIGS. 1 and 2, the hub 24 is attached to the friction disc 22 by the disc hub mounting bolts 26 and operates integrally therewith.
A bearing 27 and a bearing sleeve 28 surround the central hub 24 and the bearing and bearing sleeve are provided with stop rings 29 and 30, respectively. A suitable grease gasket 31 is placed between the hub 24 and the friction disc 22.

Upon actuation of the piston and cylinder assembly in the brake configuration of FIGS. 1 and 2, friction pad 21 engages friction disc 22 and a shaft (not shown) keyed to hub 24 causes the reaction force. Bearing bolts 14 prevent rotation of the cylinder mounting plate or spider with respect to the machine frame.

When this mechanism is used as a clutch, the hub 24 and its accessory parts, that is, the bearing 27, the bearing sleeve 28,
The stop rings 29 and 30 and the grease gasket 31 are displaced from the positions shown in FIGS. 1 and 2 to the positions shown in FIGS. 3 and 4 to face the spider 12 from the flange 25 of the hub 24. And is secured by the bolt 32 shown in FIG. In the brake arrangement of FIGS. 1 and 2, bolts 32 secure bearing sleeve 28 to the spider.

Referring to FIGS. 3 and 4, which show this mechanism as a clutch, a sprocket adapter, indicated generally at 33, is attached to the disk 22 by fasteners 34 and bearings 35.
Supported on a drive shaft (not shown).

Screws 34 secure the sprocket adapter 33 to the disk 22 and bearing sleeve 28. In this clutch arrangement, additional bearings 35 are arranged as shown in FIGS. The sprocket adapter 33 thus makes a rotational movement from the drive shaft to the friction disc.
Clutch the spider 12 which is transmitted at a predetermined speed to 22 and which is attached to the central hub 24 and is supported by a drive shaft (not shown).

[Effects of the Invention] As described above, according to the present invention, the same hub and other parts are simply rotated by 180 degrees on the brake or the clutch, and the sprocket adapter is installed. The fact that it can be used as an add-on for use as a clutch requires very little special parts to be manufactured, and spare parts inventory can be greatly reduced. Whether using a brake or a clutch, the pad 21 of friction material can be easily replaced by removing the torque post and screws 18 and 19 without disassembling the entire device, and the entire piston and cylinder assembly 10 as well. It can be easily removed.

[Brief description of drawings]

1 is an exploded perspective view according to the present invention, FIG. 2 is a cross-sectional view of the assembled brake of FIG. 1, FIG. 3 is an exploded perspective view of a mechanism in a clutch configuration, and FIG. 4 is an assembly of FIG. FIG. 6 is a cross-sectional view of the clutch thus formed. 10 ... Piston and cylinder assembly, 11 ... Cylinder base plate, 12 ... Cylinder mounting plate (spider), 13 ... Mounting screw, 14 ... Reaction force receiving bolt, 15 ... Slot, 16 ... Piston assembly, 17 ... Piston collar, 18 …
Cylindrical torque spot, 19 ... Torque post screw, 20 ... Slot, 21 ... Pad, 22 ... Friction disc, 23 ... Air fitting, 24 ... Center hub, 25 ... Annular flange, 26 ... Disc hub mounting bolt, 27 ... Bearing, 28 ... Bearing sleeve, 29,3
0 ... Stop ring, 31 ... Grease gasket, 32 ... Bolt, 33 ... Sprocket adapter, 34 ... Fastener (screw), 35 ... Bearing.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-133840 (JP, A) Actual development: S58-179863 (JP, U) JP-B-62-35532 (JP, B2)

Claims (4)

[Claims] 1. A substantially cylindrical center hub having an annular radial flange integrally formed at one end, a spider fixed to the flange of the hub by a bolt extending substantially parallel to the axis of the hub, and attached to the spider. A plurality of diaphragm type piston and cylinder assemblies, a fixture for introducing pressurized fluid for biasing said assemblies, a friction disc secured to a bearing sleeve surrounding said hub, said friction disc Has a flat surface spaced relative to the spider for fluidly coupling with the spider upon biasing of the assembly to prevent relative rotation of a friction disc relative to the spider, Are two locking torque posts fixed by removable screws and a friction material pad held in place by the torque posts during operation. Fluid operating friction coupling mechanism, characterized by comprising a de. 2. The joint mechanism according to claim 1, wherein the friction disk has fins standing on a disk surface facing the flat surface, and the fins are substantially orthogonal to the disk surface for heat dissipation. 3. A substantially cylindrical center hub surrounded by a bearing sleeve, and a fin fixed to a peripheral flange extending integrally with the hub in an annular radial direction by bolts extending substantially parallel to the axis of the hub. Consists of a disk and
The finned disc and hub are rotatable relative to a non-rotatably fixed mounting plate which provides a plurality of diaphragm type piston and cylinder assemblies and pressurized fluid for biasing the assemblies. And a mounting fixture for introduction, wherein the piston of the assembly engages the flat inner surface of the finned disc upon biasing of the assembly to stop relative rotation of the mounting plate and the hub. Fluid actuated friction brake, wherein the piston and cylinder assembly further comprises a removable torque post and screw for removal of the mounting plate and replacement of the friction pad. 4. A substantially cylindrical central hub surrounded by bearings in a bearing sleeve, a number of diaphragm type piston and cylinder assemblies and a fixture for introducing pressurized fluid to bias the assemblies. An annular, axially extending flange integral with one end of the hub fixed to the spider by a bolt extending substantially parallel to the axis of the hub, each of the piston and cylinder assemblies being a cylinder. It consists of a movable piston,
The assembly is removably attached to the spider by a torque post screw extending through the assembly, with a flat surface of a friction disk attached to the bearing sleeve and a friction piston supported by a piston of the assembly. A fluid operated friction clutch which operates to engage to rotate both the friction disc and the spider relative to each other.