JPH07749Y2 - Brake unit - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake unit used in a fluid pressure cylinder having end plates at both ends in the axial direction and a moving element that reciprocates between these end plates.

[0002]

BACKGROUND OF THE INVENTION The inventors of the present invention have previously proposed a rodless cylinder with a brake device in which a brake device is incorporated into a rodless cylinder in which a piston and a mover are connected by mechanical means. -50508.
However, this already proposed rodless cylinder with a brake device cannot be attached to an existing rodless cylinder or slide cylinder without a brake device because the brake device is incorporated in the rodless cylinder.

[0003]

The problem to be solved by the present invention is to provide a brake unit for use in a fluid pressure cylinder having end plates at both ends in the axial direction and a moving element that reciprocates between these end plates. To provide.

[0004]

In order to solve the above problems, the brake unit of the present invention is used in a fluid pressure cylinder having end plates at both axial ends and a mover reciprocating between these end plates. A brake unit to be attached to the end plate, a brake plate having both ends fixed to these stators and arranged in the axial direction of the fluid pressure cylinder, and a brake to be attached to the mover. And a brake shoe that clamps the brake plate, and an actuating portion that actuates the brake shoe by supplying or discharging a pressure fluid.

[0005]

The brake unit is used by mounting the stator on the end block of the fluid pressure cylinder, disposing the brake plate in the axial direction of the fluid pressure cylinder, and mounting the brake device on the slider.

When pressure fluid is supplied to or discharged from the working portion of the brake device, the brake shoe clamps the brake plate, so that the brake device and the mover stop at any position in the stroke, and the pressure fluid of the working portion is discharged or discharged. When supplied, the clamping pressure of the brake plate by the brake shoe is released, and the brake device and the mover can move.

[0007]

1 to 4 show a first embodiment of the present invention, in which a brake unit 1 is a rodless cylinder 2 in which a piston and a mover are connected by mechanical means as shown in FIGS. 3 and 4. Can be attached to the
A brake device 5 and a brake plate 6 having both ends fixed to the stators 4 and 4 and an intermediate portion passing through the brake device 5 are provided (see FIG. 2).

The brake device 5 includes a body 8, a cover 9 and a diaphragm 10 which divides the space between them into chambers 11a and 11b, and a brake shoe 13a which is arranged in a brake chamber 12 of the body 8 at a distance. The brake shoe 13a is attached to the brake holder 16 biased to the cover side by the return springs 15 and the brake shoe 13b is attached to the bottom wall of the brake chamber 12, and the brake shoes 13a and 13b and the brake 13b. Board 6
Each have a slight gap (see the left half of FIG. 1). Further, the chamber 11a has brake springs 17, 17 formed of disc springs inside, and a rod 19 which communicates with the outside through a breathing port 18 and one end of which abuts on the diaphragm 10 penetrates the chamber 11b tightly. The tip end comes into contact with the brake holder 16 and the chamber 11b passes through the passage 20.
Communicates with the brake release port 21.

On the other hand, the rodless cylinder has a cylinder tube 24 and end plates 25, 2 at both ends thereof.
5, a piston (not shown) that reciprocates in the cylinder tube 24, and a mover 26 that is connected to the piston by mechanical means and reciprocates along the cylinder tube 24.

The brake unit 1 includes the stators 4, 4
To the end plates 25, 25, and the brake device 5 to the mover 26 by mounting screws 22 ..., respectively, and the brake plate 6 is disposed along the cylinder tube 24 (see FIGS. 4). Therefore,
It can be installed on an existing rodless cylinder without a brake device.

When compressed air is supplied from the brake release port 21 to the chamber 11b with the brake unit 1 attached to the rodless cylinder 2, the diaphragm 10 is released.
Is displaced upward in FIG. 1 against the urging force of the brake springs 17, 17, and the brake plate 6 and the brake shoe 13 are
Since a gap is formed between a and 13b (see the left half of FIG. 1), the brake device 5 and the mover 26 can move.
When the compressed air in the chamber 11b is discharged, the diaphragm 10 and the rod 19 are displaced downward in FIG. 1 by the urging force of the brake springs 17, 17, and the brake shoe 13a slightly bends the brake plate 6 to cause the brake shoe 13b. Since the brake plate 6 is pinched between (and the right half of FIG. 1), the brake device 5 and the mover 26 stop at an arbitrary position in the stroke.

Unlike the brake device 5 which presses both side surfaces of the cylinder tube 24 for braking, there is no fear of changing the dimension of the cylinder tube 24 in the width direction. Therefore, the rodless cylinder 2 is small and lightweight. Can be something. Further, since the brake springs 17, 17 are disc springs and are operated by the diaphragm 10,
The braking device 5 can be made thin. However, the brake spring may be a coil spring and the piston may be used instead of the diaphragm. Further, instead of the breathing port, a pressure port is used, and the diaphragm 10 is displaced by the sum of the acting force of the air pressure in the chamber 11a and the urging force of the brake springs 17, 17, or the brake spring is omitted and the air pressure in the chamber 11a is reduced. The diaphragm 10 may be displaced only by the acting force of.

FIG. 5 shows a second embodiment of the present invention. The brake unit 1 is a rodless cylinder 30 of a magnet coupling type for integrally moving a piston and a mover by magnetic force.
Can be attached to the end plates 31, 31 of the rodless cylinder 30, and the brake device 5 reciprocates along the cylinder tube 32.
3 are attached respectively.

FIG. 6 shows a third embodiment of the present invention. This brake unit 1 has end plates 36, 36 at both ends.
And a slide cylinder 35 provided with a moving element 38 that reciprocates along a rod 37 connecting them, and the stators 4 and 4 are attached to the end plates 36 and 36.
The brake devices 5 are attached to the moving elements 38, respectively. Since the other configurations and operations of the second and third embodiments are the same as those of the first embodiment, detailed description will be omitted.

[0015]

Since the brake unit of the present invention can be mounted on a fluid pressure cylinder having end plates at both ends and a moving element that reciprocates between these end plates, a rodless cylinder or a slide cylinder without a brake device can be mounted. In addition, a brake device can be attached.
Further, unlike a brake that clamps a cylinder tube or the like from both sides to brake, since a large force for braking does not act on the fluid pressure cylinder, it can be mounted on a small and lightweight fluid pressure cylinder.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a brake device.

FIG. 2 is a front view of a brake unit.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 is a front view of the same.

FIG. 5 is a plan view of the second embodiment.

FIG. 6 is a front view of the third embodiment.

[Explanation of symbols]

 1 Brake Unit 2, 30 Rodless Cylinder 4 Stator 5 Brake Device 6 Brake Plate 13a, 13b Brake Shoe 25, 31, 36 End Plate 26, 33, 38 Mover 35 Slide Cylinder

Claims (1)

[Scope of utility model registration request] 1. A brake unit for use in a fluid pressure cylinder having axially opposite end plates and a moving element that reciprocates between the end plates, wherein the brake unit is fixed to the end plates. A brake shoe having both ends fixed to these stators and arranged in the axial direction of the fluid pressure cylinder; and a brake device attached to the mover, wherein the brake device clamps the brake plate. And a working unit that operates a brake shoe by supplying or discharging a pressure fluid.