JPH0732962Y2 - Rotless dress cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rodless cylinder used in various mechanical devices.

[Prior Art] In a rodless cylinder, several piston magnets and piston yokes are alternately provided inside the cylinder tube with a small gap between the inner circumferential surface and the cylinder tube, and piston blocks with integrated pistons are provided on both sides of the piston magnet. A plurality of slider magnets and slider yokes are provided alternately outside the cylinder tube with a small gap between the piston block and the outer peripheral surface of the cylinder block, and slide blocks with slider bearings are provided on both sides of the slider magnet and slider yoke. It is configured.

Since the rodless cylinder described above does not have a projecting movement of the piston rod, the mounting space is about half that of a normal cylinder, and it has the advantages that it has an excellent holding force.

[Problems to be solved by the device]

In the rodless cylinder, the magnetically coupled external slide block operates in accordance with the operation of the piston block inside the cylinder tube.

Therefore, the magnetic coupling between the piston block and the slide block needs to be effectively performed.

However, if the magnetic coupling is too strong, the frictional resistance of the piston part of the piston block and the slider bearing part of the slide block will increase partially or temporarily due to the load and load during actual use. Etc., and the durability is lowered.

In the present invention, the magnetic coupling between the piston block and the slide block is not too strong, and effective magnetic coupling is performed, and uneven wear and the accompanying heat generation are prevented to improve the durability. By stabilizing the frictional resistance value of, it is intended to obtain accurate speed control and a stable intermediate stop effect.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a plurality of piston blocks each having a plurality of piston magnets and piston yokes and pistons provided on both sides thereof inside a cylinder tube. Sliding blocks composed of corresponding slider magnets and slider yokes and slider bearings provided on both sides thereof are integrally provided, and ports for compressed air supply / exhaust are formed at both ends of the cylinder tube.

[Action]

Even in the present invention configured as described above, its operation is the same as the conventional one.

That is, compressed air is supplied from one of the compressed air exhaust ports provided on the cylinder covers at both ends of the cylinder tube and is discharged from the other port, so that one of the plurality of piston blocks inside presses the other. Then both piston blocks work together.

Then, by the operation of the plurality of piston blocks, the integrated slide block magnetically coupled to the outer circumference of the cylinder tube is slid.

In the above operation, the present invention is different from the conventional one in that there are a plurality of magnetic coupling portions.

Therefore, it is not necessary to strengthen the magnetic coupling, and it is possible to reduce the frictional resistance between the piston portion of the piston block portion, the slider bearing portion of the slide block portion, and the cylinder tube.

Further, uneven wear and heat generation due to the uneven wear are prevented, so that durability is improved.

Furthermore, since the piston blocks in the cylinder tube are separated and independent, they are matched in the cylinder tube and can be operated together, so the frictional resistance value is stable and accurate speed control is possible. This further facilitates stable intermediate stop control.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings.

In the figure, (1) is a cylinder tube made of non-magnetic material,
(2) are cylinder covers, respectively.

In the present invention, first, a plurality of piston blocks (3) (3a) are provided inside the cylinder tube (1).

That is, in the piston block (3), several piston magnets (4) and piston yokes (5) are provided alternately with the inner peripheral surface of the cylinder tube (1) with a small gap, and the pistons (6) are provided on both sides thereof. (7) is provided and configured.

Further, in the piston block (3a), several piston magnets (4a) and piston yokes (5a) are alternately provided with the inner peripheral surface of the cylinder tube (1) with a small gap, and the pistons (6a) are provided on both sides thereof. (7a) is provided and configured.

Next, a plurality of slide blocks (9) (9a) are provided outside the cylinder tube (1). That is, the slide block (9) is provided with several slider magnets (10) and slider yokes (11) alternately with an outer peripheral surface of the cylinder tube (1) with a small gap therebetween, and slider bearings (12) on both sides thereof. (13) is provided and configured.

Further, the slide block (9a) is separated from the outer peripheral surface of the cylinder tube (1) by a small gap to form a slider magnet (10a).
And slider yokes (11a) are alternately provided, and slider bearings (12a) (13a) are provided on both sides thereof.

In the illustrated embodiment, the slider bearings (13) and (12
a) are connected together.

In the present invention, the slide blocks (9) and (9a) and the slider bearings (12), (13), (12a) and (13a) are integrally formed by the connecting body (14).

In the figure, (17) and (18) are compressed air supply / exhaust ports.

In the present invention having the above structure, compressed air is supplied from one of the ports (17) and (18), and exhaust is performed from the other port (18) (17) so that one of the piston blocks (3) (3a) receives the other. By pressing, both piston blocks are moved integrally in the cylinder tube (1) to the right or to the left, and with the movement of the piston blocks (3) and (3a), magnetically coupled slide blocks (9) ( 9a) is moved in the same direction.

The movement of the slide blocks (9) (9a) is used for various automatic mechanical devices.

[Effect of device]

According to the present invention, it is not necessary to strengthen the magnetic coupling between the piston block and the slide block, and therefore the frictional resistance between the piston portion of the piston block, the slider bearing portion of the slide block and the cylinder tube can be reduced. It is possible to prevent uneven wear and heat generation due to the uneven wear to improve durability.

Furthermore, since the piston block is divided into separate parts, it fits in the cylinder tube and can be operated together, so the frictional resistance value is stable, and as a result, accurate speed control is possible. Further, stable intermediate stop control is facilitated.

[Brief description of drawings]

The drawing shows an embodiment of the present invention and is a cross-sectional view of the main part thereof. (1) …… Cylinder tube, (3) (3a) …… Piston block, (4) (4a) …… Piston magnet, (5)
(5a) …… Piston yoke, (9) (9a)… Slide block, (10) (10a)… Slider magnet, (11) (1
1a) …… Slider yoke, (14) …… Connecting body.

Continuation of front page (72) Creator Nobutaka Kiku Kami-Otanizaka, Ujichi-cho, Okazaki-shi, Aichi 4-1 (56) References JP 62-140928 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A plurality of piston blocks each comprising a piston magnet, a piston yoke, and pistons provided on both sides of the piston magnet are provided inside a cylinder tube, and slider magnets respectively corresponding to the piston blocks are provided outside the cylinder tube. A rodless cylinder characterized in that a slide block composed of a slider yoke and slider bearings provided on both sides thereof is integrally provided, and ports for compressed air supply / exhaust are formed at both ends of the cylinder tube.