Magnetic coupling oil cylinder without piston rod

Abstract

The utility model discloses a magnetic coupling piston-rod-free oil cylinder which comprises a cylinder body, an oil groove set is formed in the cylinder body and comprises a main oil groove, a communicating groove, a second oil groove and a first oil groove, the main oil groove is formed in the axis of the cylinder body and is a round cavity, the communicating groove is formed in the outer wall of the right side of the main oil groove, and the second oil groove is formed in the outer wall of the right side of the communicating groove. The second oil groove is connected with the main oil groove through the communicating groove, a reversing valve is arranged on the left side of the second oil groove, the first oil groove is fixedly connected to the left side surface of the reversing valve, a second mounting base is fixedly connected to the outer wall of the first oil groove, and a sliding magnet is slidably connected to the outer wall of the cylinder body; an oil conveying assembly is arranged on the left side of the reversing valve. By means of the structure, the cylinder body and the oil conveying assembly are connected into a whole, the oil outlet of the oil conveying assembly is connected with the oil inlet of the cylinder body, the oil inlet of the oil conveying assembly is connected with the oil return opening of the cylinder body, oil pipe connection is not needed any more, space is saved, installation is more convenient, and space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to a magnetically coupled piston rod-less oil cylinder. Background Art

[0002] The magnetically coupled rodless cylinder is a cylinder that uses the principle of magnetic coupling to make the piston move in the cylinder, thereby realizing the reciprocating motion of the load. The characteristics of the magnetically coupled rodless cylinder are that the overall installation size is small, which saves about 50% of the axial space compared to the standard cylinder, and the piston areas at both ends of the thrust and pull of the magnetically coupled rodless cylinder are equal, so the thrust and pull values ​​are equal, and it is easy to achieve intermediate positioning. The magnetically coupled rodless cylinder can be used for horizontal, vertical and inclined load movement, and can be directly used as a mechanical module in single-axis, dual-axis, three-axis and parallel-axis motion design. It can be used for conveying, packaging and various handling systems. It is mainly used in manipulators, wave soldering machines, automatic dispensing machines, automatic feeders, blow molding machines, textile machinery, engraving machinery, transportation systems, logistics equipment, automatic doors, machine tool automation equipment, etc.

[0003] In the existing hydraulic system, the oil cylinder and the hydraulic power unit are separate and independent, and the two parts need to be connected with an oil pipe; the oil pump and various hydraulic valves of the existing hydraulic power unit are independent and need to be connected with an oil circuit board and an oil pipe, which is cumbersome to install, large in size, and occupies a large space, and cannot be used in some places with small space. Utility Model Content

[0004] The utility model aims to provide a magnetically coupled piston rodless oil cylinder, which adopts a compact design, integrates various oil pressure valves and oil pumps together, reduces the volume of the entire system, occupies less space, and can be installed and used in some places with small spaces.

[0005] In order to achieve the above-mentioned purpose, a magnetically coupled piston rodless oil cylinder is provided, comprising a cylinder body, wherein an oil groove group is provided inside the cylinder body, wherein the oil groove group comprises: a main oil groove, a connecting groove, a second oil groove, and a first oil groove, wherein the main oil groove is arranged at the axis of the cylinder body, wherein the main oil groove is a circular cavity, wherein the connecting groove is arranged on the right outer wall of the main oil groove, wherein the second oil groove is connected to the main oil groove through the connecting groove, wherein a reversing valve is arranged on the left side of the second oil groove, wherein the first oil groove is fixedly connected to the left side surface of the reversing valve, wherein the outer wall of the first oil groove is fixedly connected to a second mounting seat, wherein a sliding magnet is slidably connected to the outer wall of the cylinder body, and wherein an oil delivery assembly is arranged on the left side of the reversing valve. The purpose of arranging the oil delivery assembly is to achieve the effect of replacing the traditional oil pump and being tightly connected to the oil cylinder.

[0006] According to the magnetically coupled rodless oil cylinder, the inner wall of the main oil groove is slidably connected with a magnet piston, and the outer wall of the sliding magnet is fixedly connected with a first mounting seat.

[0007] According to the magnetically coupled rodless oil cylinder, the outer wall of the first oil groove is connected to the second mounting seat by screws, and the outer wall of the second mounting seat begins to have a plurality of screw holes.

[0008] According to the magnetically coupled rodless cylinder, a plurality of screw holes are provided on the outer wall of the first mounting seat, and the oil delivery assembly comprises: a motor, a screw pump, a pump cavity, and a reversing valve, and the motor is fixedly connected to the inner wall of the first oil tank.

[0009] According to the magnetically coupled rodless oil cylinder, the spiral pump is fixedly connected to the output end of the first oil tank, and the pump cavity is fixedly connected to the left inner wall of the reversing valve.

[0010] According to the magnetically coupled rodless cylinder, a sealing ring is provided on the left side of the pump cavity, and the spiral pump is slidably connected to the inner wall of the pump cavity.

[0011] According to the magnetically coupled rodless oil cylinder, the outer wall of the cylinder body is fixedly connected to the limit end, and the outer wall of the limit end is provided with a plurality of screw holes.

[0012] The beneficial effects of the utility model are as follows: the cylinder body and the oil delivery component are connected as a whole, the oil outlet of the oil delivery component is connected to the oil inlet of the cylinder body, and the oil inlet of the oil delivery component is connected to the oil return port of the cylinder body, and no oil pipe is needed for connection, which saves space and is more convenient to install; the reversing valve and the oil delivery component are integrated together, and the structure is more compact and saves space; the return oil of the cylinder body directly enters the oil pump for circulation, and does not need to return to the oil tank and then enter the oil pump, thus eliminating the need for an oil tank and saving space.

[0013] Compared with the traditional hydraulic power system, the utility model is smaller and more compact, and can be used in places with narrow space. The oil delivery component is directly connected to the cylinder body, eliminating the oil pipe, making installation more convenient and quicker. Maintenance is faster and more convenient.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the internal structure of the magnetically coupled piston rodless oil cylinder of the utility model;

[0017] Figure 2 This is an enlarged view of part A of the magnetically coupled piston rodless oil cylinder of the utility model;

[0018] Figure 3 It is an enlarged view of part B of the magnetically coupled piston rodless cylinder of the utility model.

[0019] Legend:

[0020] 1. Cylinder body; 2. Sliding magnet; 3. First mounting seat; 4. Magnetic piston; 5. Motor; 6. Screw pump; 7. First oil tank; 8. Reversing valve; 9. Second mounting seat; 10. Second oil tank; 11. Connecting tank; 12. Main oil tank; 13. Limit end; 14. Pump cavity. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figures 1 to 3 The magnetically coupled piston rodless oil cylinder of the utility model embodiment comprises a cylinder body 1, an oil groove group is opened inside the cylinder body 1, and the oil groove group comprises: a main oil groove 12, a connecting groove 11, a second oil groove 10, and a first oil groove 7. The main oil groove 12 is arranged at the axis of the cylinder body 1, the main oil groove 12 is a circular cavity, the connecting groove 11 is arranged on the right outer wall of the main oil groove 12, the second oil groove 10 is connected to the main oil groove 12 through the connecting groove 11, a reversing valve 8 is arranged on the left side of the second oil groove 10, the first oil groove 7 is fixedly connected to the left side surface of the reversing valve 8, the outer wall of the first oil groove 7 is fixedly connected to the second mounting seat 9, the outer wall of the cylinder body 1 is slidably connected to the sliding magnet 2, the left side of the reversing valve 8 is provided with an oil delivery component, and the inner wall of the main oil groove 12 A magnet piston 4 is slidably connected, the outer wall of the sliding magnet 2 is fixedly connected to the first mounting seat 3, the outer wall of the first oil groove 7 is connected to the second mounting seat 9 by screws, the outer wall of the second mounting seat 9 begins to have multiple screw holes, and the outer wall of the first mounting seat 3 is provided with multiple screw holes. The oil delivery component includes: a motor 5, a spiral pump 6, a pump cavity 14, and a reversing valve 8. The motor 5 is fixedly connected to the inner wall of the first oil groove 7, the spiral pump 6 is fixedly connected to the output end of the first oil groove 7, the pump cavity 14 is fixedly connected to the left inner wall of the reversing valve 8, a sealing ring is arranged on the left side of the pump cavity 14, the spiral pump 6 is slidably connected to the inner wall of the pump cavity 14, the outer wall of the cylinder body 1 is fixedly connected to the limit end 13, and the outer wall of the limit end 13 is provided with multiple screw holes.

[0023] The reversing valve 8 contains a plurality of valve cores or valve plates, and the flow path of the hydraulic oil in the hydraulic system is changed by moving the valve cores or valve plates, thereby controlling the movement direction of the actuator.

[0024] The inner wall of the magnet piston 4 is a permanent magnet made of rare earth material, which may be neodymium iron boron (NdFeB) and neodymium cobalt (SmCo). A groove is formed on the outer wall of the permanent magnet, and a sealing ring made of a polymer material is installed in the groove.

[0025] The inner wall of the sliding magnet 2 is provided with circulating balls, and the outer wall of the cylinder body 1 is provided with ball grooves, which facilitates the sliding magnet 2 to slide on the outer wall of the cylinder body 1 through the balls. The inner wall of the sliding magnet 2 is provided with a permanent magnet mounting groove, and the material of the permanent magnet is the same as that of the permanent magnet inside the magnet piston 4.

[0026] Working principle: The coupling between the sliding magnet 2 and the magnet piston 4 is realized by magnetic force, and the piston rod is not required. When in use, the motor 5 is started and the spiral pump 6 is driven to rotate through the motor 5, and the hydraulic oil is transported to the inside of the reversing valve 8. The reversing valve 8 selects the spiral pump 6 to output the hydraulic oil to the upper oil tank or the lower oil tank, so as to control the magnet piston 4 to move left or right. When the hydraulic oil is transported from left to right on the inner wall of the main oil tank 12, the upper oil tank transports the hydraulic oil from right to left in the upper oil tank through the connecting groove 11. At this time, the oil tank above the spiral pump 6 is connected with the oil tank above the main oil tank 12 through the reversing valve 8, so as to control the sliding of the magnet piston 4, and then control the sliding of the sliding magnet 2, and then drive the equipment connected to the second oil tank 10 to work. The maximum movable distance of the sliding magnet 2 can be limited by the limit end 13. By setting the limit end 13, the first mounting seat 3, and the second mounting seat 9, the utility model can be conveniently installed on the required equipment by screws.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A magnetically coupled piston rodless cylinder, comprising a cylinder body (1), characterized in that: An oil groove group is provided inside the cylinder body (1), and the oil groove group comprises: a main oil groove (12), a connecting groove (11), a second oil groove (10), and a first oil groove (7). The main oil groove (12) is arranged at the axis of the cylinder body (1). The main oil groove (12) is a circular cavity. The connecting groove (11) is arranged on the right outer wall of the main oil groove (12). The second oil groove (10) is connected to the main oil groove (12) through the connecting groove (11). A reversing valve (8) is arranged on the left side of the second oil groove (10). The first oil groove (7) is fixedly connected to the left side surface of the reversing valve (8). The outer wall of the first oil groove (7) is fixedly connected to a second mounting seat (9). The outer wall of the cylinder body (1) is slidably connected to a sliding magnet (2). An oil delivery assembly is arranged on the left side of the reversing valve (8).

2. The magnetically coupled rodless cylinder according to claim 1, characterized in that: The inner wall of the main oil groove (12) is slidably connected to a magnet piston (4), and the outer wall of the sliding magnet (2) is fixedly connected to a first mounting seat (3).

3. The magnetically coupled rodless cylinder according to claim 2, characterized in that: The outer wall of the first oil groove (7) is connected to a second mounting seat (9) via screws, and the outer wall of the second mounting seat (9) has a plurality of screw holes.

4. The magnetically coupled rodless cylinder according to claim 2, characterized in that: The outer wall of the first mounting seat (3) is provided with a plurality of screw holes. The oil delivery assembly comprises: a motor (5), a screw pump (6), a pump cavity (14), and a reversing valve (8). The motor (5) is fixedly connected to the inner wall of the first oil tank (7).

5. The magnetically coupled rodless cylinder according to claim 4, characterized in that: The spiral pump (6) is fixedly connected to the output end of the first oil tank (7), and the pump cavity (14) is fixedly connected to the left inner wall of the reversing valve (8).

6. The magnetically coupled rodless cylinder according to claim 4, characterized in that: A sealing ring is provided on the left side of the pump cavity (14), and the spiral pump (6) is slidably connected to the inner wall of the pump cavity (14).

7. The magnetically coupled rodless cylinder according to claim 1, characterized in that: The outer wall of the cylinder body (1) is fixedly connected to a limit end (13), and the outer wall of the limit end (13) is provided with a plurality of screw holes.

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