Magnetic coupling type rodless cylinder

Abstract

The utility model discloses a magnetic coupling type rodless air cylinder which comprises two end covers, a cylinder barrel fixedly installed between the two end covers and an outer piston movably arranged on the outer side of the cylinder barrel in a sleeved mode, a plurality of outer magnetic rings are embedded in the outer piston, an inner piston is movably installed in the cylinder barrel, inner magnetic rings corresponding to the outer magnetic rings are embedded in the inner piston, and the outer magnetic rings are embedded in the inner magnetic rings. According to the air cylinder, dust attached to the surface of the cylinder barrel can be swept away through the arranged brush, the dust is swept away into the groove, the dust is prevented from being attached to the cylinder barrel, and therefore the air cylinder is prevented from being damaged by the dust, and the service life of the air cylinder is prolonged. And dust attached to the brush can be scraped off through the arranged conical surface ring, and meanwhile, the arranged sealing piece seals the space between the sliding block and the cylinder barrel, so that the dust is prevented from entering the space between the outer piston and the cylinder barrel, the outer piston or the cylinder barrel is prevented from being abraded, and the service life of the outer piston or the cylinder barrel is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a magnetic coupling type rodless cylinder. Background Art

[0002] The magnetic coupling type rodless cylinder is a special pneumatic actuator. Its characteristic lies in that there is no traditional piston rod. Instead, it utilizes the magnetic coupling principle to transmit the movement of the piston inside the cylinder to the external actuator through magnetic force. It mainly consists of a cylinder barrel, an outer piston, an inner piston, an outer magnetic ring, an inner magnetic ring, a slider and other parts.

[0003] When the existing magnetic coupling type rodless cylinder is used in an environment with more dust, the dust will adhere to the outer side of the cylinder barrel. As the outer piston moves, the dust will enter between the outer piston and the cylinder barrel, resulting in wear of the outer piston and the cylinder barrel and shortening its service life. Content of the Utility Model

[0004] The purpose of the utility model is to provide a magnetic coupling type rodless cylinder to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A magnetic coupling type rodless cylinder, including two end caps, a cylinder barrel fixedly installed between the two end caps, and an outer piston movably sleeved outside the cylinder barrel. A plurality of outer magnetic rings are embedded on the outer piston. An inner piston is movably installed inside the cylinder barrel. Inner magnetic rings corresponding to the outer magnetic rings are embedded on the inner piston, and the inner magnetic rings and the outer magnetic rings have opposite magnetic polarities. A slider is fixedly installed on the outer piston. Snap rings are installed on the inner sides of both ends of the slider. The inner side wall of the snap ring is provided with a brush distributed in a ring shape. The end of the brush away from the snap ring is closely attached to the outer side wall of the cylinder barrel. Conical rings are symmetrically arranged on the outer side of the cylinder barrel. A groove is arranged on the outer side of the cylinder barrel and on the side adjacent to the conical ring. Seals are installed at both ends of the outer piston and inside the slider. The seals are slidably connected with the cylinder barrel.

[0006] As a preferred scheme of the utility model, a fixed ear is integrally formed on the outer side of the snap ring. A screw is threadedly connected to the fixed ear. Screw holes matched with the screw are arranged at both ends of the slider.

[0007] As a preferred scheme of the utility model, sealing end sleeves are arranged at both ends of the cylinder barrel.

[0008] As a preferred scheme of the utility model, two guide rods are fixedly connected between the two end caps, and the slider is slidably connected with the guide rods.

[0009] As a preferred scheme of the utility model, hydraulic buffers are installed on both of the two end caps.

[0010] As a preferred embodiment of the present utility model, mounting rods are fixedly connected to the outer sides of the two end caps, and two mounting grooves are formed on one side of each mounting rod.

[0011] As a preferred embodiment of the present utility model, an iron core is provided in the middle of the inner magnetic ring.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The dust attached to the surface of the cylinder barrel can be swept away by the brush provided in the present utility model, and the dust is swept into the groove, preventing the dust from adhering to the cylinder barrel. Moreover, the dust attached to the brush can be scraped off by the conical surface ring provided, and at the same time, the seal provided seals between the slider and the cylinder barrel, thereby preventing dust from entering between the outer piston and the cylinder barrel, causing wear of the outer piston or the cylinder barrel, and prolonging its service life. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is of the present utility model Figure 1 an enlarged view of part A in;

[0015] Figure 3 is a front sectional view of the present utility model;

[0016] Figure 4 is of the present utility model Figure 3 an enlarged view of part B in;

[0017] Figure 5 is of the present utility model Figure 3 an enlarged view of part C in;

[0018] Figure 6 is a structural schematic diagram of the cylinder barrel of the present utility model;

[0019] Figure 7 is of the present utility model Figure 6 an enlarged view of part D in;

[0020] Figure 8 is a structural schematic diagram of the snap ring of the present utility model.

[0021] In the figure: 1, end cap; 2, hydraulic buffer; 3, cylinder barrel; 4, guide rod; 5, mounting rod; 6, mounting groove; 7, slider; 8, brush; 9, iron core; 10, snap ring; 11, fixed ear; 12, screw; 13, sealing end sleeve; 14, groove; 15, conical surface ring; 16, seal; 17, outer piston; 18, outer magnetic ring; 19, inner piston; 20, inner magnetic ring. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a magnetic coupling type rodless cylinder, which includes two end covers 1, a cylinder barrel 3 fixedly installed between the two end covers 1, and an outer piston 17 movably sleeved outside the cylinder barrel 3. A plurality of outer magnetic rings 18 are embedded on the outer piston 17. An inner piston 19 is movably installed inside the cylinder barrel 3. Inner magnetic rings 20 corresponding to the outer magnetic rings 18 are embedded on the inner piston 19, and the inner magnetic rings 20 and the outer magnetic rings 18 have opposite magnetic polarities. A slider 7 is fixedly installed on the outer piston 17. Clamping rings 10 are installed on the inner sides of both ends of the slider 7. Brush hairs 8 are arranged in a ring shape on the inner side walls of the clamping rings 10. When the slider 7 moves, the brush hairs 8 can push and sweep away the dust adhering to the outside of the cylinder barrel 3. The dust will be pushed by the brush hairs 8 to the conical ring 15. When part of the dust moves along the conical ring 15, it will directly fall off and separate from the cylinder barrel 3. Part of the dust will move along the conical ring 15 until it falls into the groove 14. There is also a part of the dust adhering to the brush hairs 8. When the brush hairs 8 move above the groove 14 and then return, the outer edge of the conical ring 15 will scrape off the dust adhering to the brush hairs 8, thereby preventing the dust from adhering to the outside of the cylinder barrel 3. One end of the brush hairs 8 away from the clamping ring 10 closely adheres to the outer side wall of the cylinder barrel 3. Conical rings 15 are symmetrically arranged on the outside of the cylinder barrel 3. The conical rings 15 are used to scrape off the dust adhering to the brush hairs 8. A groove 14 is arranged on the outside of the cylinder barrel 3 and on the side adjacent to the conical ring 15. When the brush hairs 8 move above the groove 14, the brush hairs 8 will not enter the groove 14 to avoid the brush hairs 8 contacting the dust in the groove 14. Seals 16 are installed at both ends of the outer piston 17 and inside the slider 7. The seals 16 are used to seal between the slider 7 and the cylinder barrel 3 to prevent dust from entering between the outer piston 17 and the cylinder barrel 3, resulting in wear of the outer piston 17 or the cylinder barrel 3. The seals 16 are slidably connected to the cylinder barrel 3.

[0024] Wherein, fixing ears 11 are integrally formed on the outside of the clamping ring 10. Screws 12 are threadedly connected to the fixing ears 11. The screws 12 are used to fix the clamping ring 10 on the slider 7. Using the screws 12 for fixation facilitates people to disassemble and assemble the clamping ring 10. Screw holes matching the screws 12 are arranged at both ends of the slider 7.

[0025] Wherein, sealing end sleeves 13 are arranged at both ends of the cylinder barrel 3. The sealing end sleeves 13 are used to seal between the cylinder barrel 3 and the end covers 1 to avoid leakage.

[0026] Among them, two guide rods 4 are fixedly connected between two end caps 1. The guide rods 4 are used to guide the slider 7, prevent the slider 7 from deflecting during movement, improve the stability of the slider 7 during movement, and the slider 7 is slidably connected to the guide rods 4.

[0027] Among them, hydraulic buffers 2 are installed on both end caps 1. The hydraulic buffers 2 are used to buffer the impact of the slider 7, thereby protecting the slider 7 and the end caps 1 and extending their service life.

[0028] Among them, mounting rods 5 are fixedly connected to the outer sides of the two end caps 1. Two mounting grooves 6 are provided on one side of the mounting rods 5. The cross-section of one mounting groove 6 is circular, and the cross-section of the other mounting groove 6 is square, so that they can be used to mount a circular magnetic switch or a square magnetic switch respectively.

[0029] Among them, an iron core 9 is provided in the middle of the inner magnetic ring 20. The iron core 9 can effectively gather the magnetic field generated by the inner magnetic ring 20 together, thereby enhancing the magnetic field intensity.

[0030] Specifically, during use, compressed gas enters the cylinder barrel 3 to push the inner piston 19 to move. The inner piston 19 drives the inner magnetic ring 20 to move. The inner magnetic ring 20 makes the outer magnetic ring 18 move through magnetic force. The outer magnetic ring 18 makes the outer piston 17 move. The outer piston 17 drives the slider 7 to move to realize the action of the air cylinder. When the slider 7 moves, it will drive the brush 8 to move. The brush 8 pushes and sweeps the dust attached to the outside of the cylinder barrel 3. The dust will be pushed by the brush 8 to the conical ring 15. Some dust will directly fall off when moving along the conical ring 15 and separate from the cylinder barrel 3. Some dust will move along the conical ring 15 until it falls into the groove 14. There is also a part of the dust attached to the brush 8. When the brush 8 moves above the groove 14 and returns, the outer edge of the conical ring 15 will scrape off the dust attached to the brush 8, thereby preventing the dust from adhering to the outside of the cylinder barrel 3. And a seal 16 is provided to seal between the slider 7 and the cylinder barrel 3 to prevent the dust missed by the brush 8 from entering between the outer piston 17 and the cylinder barrel 3, resulting in wear of the outer piston 17 or the cylinder barrel 3.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] Furthermore, the terms "first", "second", "third", and "fourth" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", and "fourth" may explicitly or implicitly include at least one of such features.

[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "set", "connected", "fixed", "swivelly connected", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A magnetic coupling type rodless cylinder, comprising two end covers (1), a cylinder barrel (3) fixedly installed between the two end covers (1), and an outer piston (17) movably sleeved outside the cylinder barrel (3). A plurality of outer magnetic rings (18) are embedded on the outer piston (17). An inner piston (19) is movably installed inside the cylinder barrel (3). Inner magnetic rings (20) corresponding to the outer magnetic rings (18) are embedded on the inner piston (19), and the inner magnetic rings (20) and the outer magnetic rings (18) have opposite magnetic polarities. A slider (7) is fixedly installed on the outer piston (17), characterized in that: Clamping rings (10) are installed on the inner sides of both ends of the slider (7). The inner side walls of the clamping rings (10) are provided with annularly distributed brushes (8). One end of the brushes (8) far from the clamping rings (10) is in close contact with the outer side wall of the cylinder barrel (3). The outer side of the cylinder barrel (3) is symmetrically provided with tapered surface rings (15). A groove (14) is provided on the outer side of the cylinder barrel (3) and on the side adjacent to the tapered surface rings (15). Seals (16) are installed at both ends of the outer piston (17) and inside the slider (7). The seals (16) are slidably connected to the cylinder barrel (3).

2. The magnetic coupling type rodless cylinder according to claim 1, wherein: Fixed ears (11) are integrally formed on the outer sides of the clamping rings (10). Screws (12) are threadedly connected to the fixed ears (11). Screw holes matching the screws (12) are provided at both ends of the slider (7).

3. The magnetic coupling type rodless cylinder according to claim 1, characterized in that: Sealing end sleeves (13) are provided at both ends of the cylinder barrel (3).

4. The magnetic coupling type rodless cylinder according to claim 1, wherein: Two guide rods (4) are fixedly connected between the two end covers (1). The slider (7) is slidably connected to the guide rods (4).

5. A magnetic coupling type rodless cylinder according to claim 1, characterized in that: Hydraulic buffers (2) are installed on both end covers (1).

6. The magnetic coupling type rodless cylinder according to claim 1, wherein: Mounting rods (5) are fixedly connected to the outer sides of the two end covers (1). Two mounting grooves (6) are provided on one side of the mounting rods (5).

7. A magnetic coupling type rodless cylinder according to claim 1, characterized in that: An iron core (9) is provided in the middle of the inner magnetic ring (20).

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