Plane magnetic coupling capable of reducing axial suction

Abstract

The utility model discloses a planar magnetic coupling capable of reducing axial suction. The planar magnetic coupling comprises a base, a magnet and a protective cover. The base is provided with a first surface and a second surface opposite to the first surface, the first surface is provided with a mounting surface of the magnet, the middle of the mounting surface is provided with a protruding portion extending in the direction away from the second surface, the protruding portion is provided with a mounting hole in the direction from the top of the protruding portion to the first surface, and the magnet is in a hollow ring shape. The magnet is installed on the installation face and arranged around the protruding part, a magnetic piece is embedded in the installation hole, and the protective cover is arranged on the base in a covering mode to wrap the magnet and the magnetic piece. According to the utility model, the magnetic pieces are arranged in the mounting holes, when the two symmetrically arranged permanent magnet couplings with the same structure work, mutual repulsive force is generated in the axial direction of the permanent magnet couplings due to the same magnetism of the magnetic pieces in the two permanent magnet couplings, so that part of axial suction force in the movement process of the permanent magnet couplings can be counteracted; the abrasion of the bearing is reduced, and the maintenance and replacement cost of the bearing is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a planar magnetic coupling for reducing axial suction. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, rotates synchronously during the transmission of motion and power, and does not disengage under normal circumstances. Sometimes it is also used as a safety device to prevent the connected parts from being subjected to excessive loads and to play an overload protection role. At present, due to the very high precision requirements of the mechanical connection between the driving shaft and the driven shaft, the selection of couplings is also very strict. Since the structure of the contact coupling is a mechanical connection, it will cause wear and affect power transmission. When the load is too heavy for a long time, it will cause damage to the power motor, and the subsequent investment cost will increase accordingly. Since the axial component of the non-contact coupling is large during the rotation process, the force on the bearing of the bearing shaft is large, which often causes bearing damage and high maintenance and replacement costs. Summary of the invention

[0003] The utility model aims to provide a planar magnetic coupling which reduces axial suction force, so as to solve the problem that the existing non-contact coupling is prone to cause bearing damage.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a planar magnetic coupling for reducing axial suction, comprising two symmetrically arranged permanent magnetic couplings with the same structure, a working gap is provided between the two permanent magnetic couplings, and the permanent magnetic coupling comprises a base, a magnet and a protective cover; the base has a first surface and a second surface opposite to the first surface, a mounting surface for the magnet is provided on the first surface, a protrusion extending away from the second surface is provided in the middle of the mounting surface, a mounting hole is opened from the top of the protrusion toward the first surface, the magnet is in a hollow ring shape, the magnet is mounted on the mounting surface and arranged around the protrusion, a magnetic part is embedded in the mounting hole, and the protective cover is provided on the base to cover the magnet and the magnetic part.

[0005] Preferably, the magnetic part is a solid block, the mounting hole is a blind hole, the base is provided with a coupling hole from the second surface toward the first surface, the coupling hole is a blind hole and is used for mounting a rotating shaft.

[0006] Preferably, the magnetic part is annular and includes a center hole, the inner diameter of the mounting hole is set corresponding to the outer diameter of the magnetic part, the base is provided with a coupling hole from the second surface to the first surface, the coupling hole is connected to the mounting hole, the coupling hole is used to install a rotating shaft, and the rotating shaft is passed through the coupling hole and the center hole.

[0007] Preferably, the coupling hole is coaxially arranged with the mounting hole.

[0008] Preferably, a magnetically conductive gasket is provided between the magnet and the mounting surface, the magnetically conductive gasket is annular and is sleeved on the raised portion.

[0009] Preferably, the magnetic conductive gasket is bonded to the mounting surface by glue.

[0010] Preferably, the magnet is a multi-pole axially magnetized magnet, and the magnet is a ring-shaped magnet formed by splicing a number of magnetic sheets in a fan-ring structure.

[0011] Preferably, the protective cover is threadedly connected to the base.

[0012] Preferably, a threaded hole connected to the shaft coupling hole is also provided on the side surface of the base, and the threaded hole is used to fix the rotating shaft.

[0013] Preferably, an edge of the mounting surface is provided with a retaining wall extending upward, a groove is formed between the retaining wall and the raised portion, and the magnet is embedded in the groove.

[0014] Compared with the prior art, the utility model discloses a planar magnetic coupling for reducing axial suction force, by opening a mounting hole on the raised portion and arranging a magnetic part in the mounting hole. When two symmetrically arranged permanent magnetic couplings with the same structure are working, due to the same magnetic properties of the magnetic parts in the two permanent magnetic couplings, a mutually repulsive force is generated in the axial direction of the permanent magnetic coupling, thereby partially offsetting the axial suction force of the permanent magnetic coupling during movement, effectively reducing the wear of the bearings on the rotating shaft, protecting the bearings, and saving the cost of bearing maintenance and replacement. The design is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of a planar magnetic coupling with a structure that reduces axial suction force in an embodiment of the utility model.

[0016] Figure 2 It is a three-dimensional diagram from another angle of a planar magnetic coupling for reducing axial suction force in one structure of an embodiment of the utility model.

[0017] Figure 3 This is an exploded view of a planar magnetic coupling with a structure that reduces axial suction force in an embodiment of the utility model.

[0018] Figure 4 This is a structural diagram of a planar magnetic coupling with a structure for reducing axial suction force without a protective cover in accordance with an embodiment of the utility model.

[0019] Figure 5This is a state diagram of a planar magnetic coupling with a structure for reducing axial suction in an embodiment of the utility model when in use.

[0020] Figure 6 It is a schematic structural diagram of a planar magnetic coupling for reducing axial suction force in another structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0022] like Figures 1 to 6 As shown, an embodiment of the utility model provides a planar magnetic coupling for reducing axial suction, including two symmetrically arranged permanent magnetic couplings with the same structure, a working gap is provided between the two permanent magnetic couplings, and the permanent magnetic coupling includes a base 1, a magnet 3 and a protective cover 2; the base 1 has a first surface 11 and a second surface 12 opposite to the first surface 11, a mounting surface of the magnet 3 is provided on the first surface 11, a protrusion 111 extending away from the second surface 12 is provided in the middle of the mounting surface, and a mounting hole 112 is opened from the top of the protrusion 111 toward the first surface 11, the magnet 3 is in a hollow ring shape, the magnet 3 is installed on the mounting surface and arranged around the protrusion 111, a magnetic part 4 is embedded in the mounting hole 112, and the protective cover 2 is covered on the base 1 to cover the magnet 3 and the magnetic part 4. Specifically, the base 1 and the protective cover 2 are both made of non-magnetic materials, such as aluminum alloy or stainless steel. The base 1 is an overall boss structure, and the magnet 3 is an overall hollow ring shape. The magnet 3 is a permanent magnet.

[0023] The planar magnetic coupling of the utility model embodiment reduces the axial suction force by opening a mounting hole 112 on the raised portion 111 and arranging a magnetic member 4 in the mounting hole 112. When two symmetrically arranged permanent magnetic couplings with the same structure are working, since the magnetic properties of the magnetic members 4 in the two permanent magnetic couplings are the same, a mutually repulsive force is generated in the axial direction of the permanent magnetic coupling, thereby partially offsetting the axial suction force of the permanent magnetic coupling during movement, effectively reducing the wear of the bearings on the rotating shaft 6, protecting the bearings, and saving the cost of bearing maintenance and replacement. The design is ingenious.

[0024] In the embodiment of the utility model, Figures 2 to 4As shown, the magnetic part 4 is a solid block, the mounting hole 112 is a blind hole, and the base 1 is provided with a shaft hole 121 from the second surface 12 to the first surface 11. The shaft hole 121 is a blind hole and is used to install the rotating shaft 6. Specifically, the magnetic part 4 is a circular solid block-shaped magnetic body, such as a magnet. The specific type of the magnetic part 4 is not limited as long as it can generate magnetism. The magnetic part 4 is embedded in the mounting hole 112 and closes the mounting hole 112. The surface of the magnetic part 4 facing outward is flush or substantially flush with the top surface of the protrusion 111 to make the structure neater and more convenient to install the protective cover 2. The rotating shaft 6 includes two, namely the active rotating shaft and the driven rotating shaft. Correspondingly, the permanent magnet coupling connected to the active rotating shaft 6 is the active permanent magnet coupling, and the permanent magnet coupling connected to the driven rotating shaft 6 is the driven permanent magnet coupling. Non-contact planar transmission can be achieved between the active rotating shaft and the driven rotating shaft. During installation, there is no need to ensure the high-precision horizontal requirements between the two shafts, so that the shaft transmission can be achieved within the effective error range, which can effectively eliminate noise, dust, wear and tear, and is more convenient and quick in later disassembly and maintenance, reducing maintenance time and cost, and improving production efficiency and product quality.

[0025] In some other embodiments of the present utility model, such as Figure 1 , Figure 6 And refer to Figures 2 to 3 As shown, the magnetic component 4 is annular and includes a center hole. The inner diameter of the mounting hole 112 is set corresponding to the outer diameter of the magnetic component 4. The base 1 is provided with a coupling hole 121 from the second surface 12 to the first surface 11. The coupling hole 121 is connected to the mounting hole 112. The coupling hole 121 is used to install the rotating shaft 6. The rotating shaft 6 is inserted into the coupling hole 121 and the center hole. Specifically, the magnetic component 4 may not be a solid block structure, but an annular structure. The coupling hole 121 is coaxially arranged with the mounting hole 112, and the coupling hole 121 and the mounting hole 112 are both coaxially arranged with the base 1. At this time, the rotating shaft 6 can pass through the coupling hole 121 and the center hole and be flush with the top surface of the raised portion 111. This structure can further ensure the stability of the rotating shaft 6 and make the size of the base 1 more compact.

[0026] In the embodiment of the utility model, a magnetic gasket 5 is provided between the magnet 3 and the mounting surface. The magnetic gasket 5 is annular and is sleeved on the raised portion 111. The magnetic gasket 5 is bonded to the mounting surface by glue. The magnet 3 and the magnetic gasket 5 are also bonded by glue. The magnet 3, the magnetic gasket 5 and the base 1 are bonded as a whole by glue to ensure that the magnet 3 and the magnetic gasket 5 will not become loose during long-term operation. In the case where there is no magnetic gasket 5, the magnet 3 can be directly bonded to the mounting surface by glue, etc., which is convenient to operate.

[0027] In the embodiment of the utility model, the magnet 3 is a multi-pole axial magnetized magnet, and the magnet 3 is a ring-shaped magnet 3 formed by splicing a plurality of magnetic sheets 31 in a fan-shaped ring structure. Specifically, the magnetic poles of the magnet 3 are a multi-pole axial magnetized magnet 3 in which N, S, N, and S are alternately arranged. It should be noted that the magnet 3 can also be an integrated magnet 3, which further saves assembly time.

[0028] In the embodiment of the utility model, the protective cover 2 is threadedly connected to the base 1. Specifically, the base 1 is provided with an external thread, and the protective cover 2 is provided with an internal thread that matches the external thread, and the protective cover 2 and the base 1 are tightened by thread matching. Of course, the protective cover 2 and the base 1 can also be welded, which is suitable for situations where high sealing requirements are required.

[0029] In the embodiment of the utility model, a threaded hole 13 connected to the shaft coupling hole 121 is also provided on the side of the base 1, and the threaded hole 13 is used to fix the rotating shaft 6. By providing a plurality of threaded holes 13 on the base 1 and correspondingly providing matching holes on the rotating shaft 6, the threaded holes 13 and the matching holes are connected by bolts to fix the base 1 and the rotating shaft 6, and keep the rotating shaft 6 and the permanent magnetic coupling synchronously transmitted.

[0030] In some other specific implementations of the utility model embodiment, the edge of the mounting surface is provided with a retaining wall extending upward, a groove is formed between the retaining wall and the raised portion 111, and the magnet 3 is embedded in the groove. Specifically, the edge of the mounting surface is provided with a retaining wall extending upward, a groove is formed between the retaining wall and the raised portion 111, and the magnet 3 is embedded in the groove, which can further fix the magnet 3, and the fixing effect is better. The outer side wall of the retaining wall is provided with an external thread to cooperate with the protective cover 2 to tighten the protective magnet 3.

[0031] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A planar magnetic coupling for reducing axial suction, comprising two symmetrically arranged permanent magnetic couplings of the same structure, with a working gap provided between the two permanent magnetic couplings, characterized in that: The permanent magnet coupling includes a base, a magnet and a protective cover; the base has a first surface and a second surface opposite to the first surface, the first surface is provided with a mounting surface for the magnet, the middle of the mounting surface is provided with a protrusion extending away from the second surface, the protrusion is provided with a mounting hole from the top thereof toward the first surface, the magnet is in a hollow ring shape, the magnet is mounted on the mounting surface and arranged around the protrusion, a magnetic part is embedded in the mounting hole, and the protective cover is provided on the base to cover the magnet and the magnetic part.

2. The planar magnetic coupling for reducing axial suction as claimed in claim 1, characterized in that: The magnetic part is a solid block, the mounting hole is a blind hole, the base is provided with a coupling hole from the second surface toward the first surface, the coupling hole is a blind hole and is used for mounting a rotating shaft.

3. The planar magnetic coupling for reducing axial suction as claimed in claim 1, characterized in that: The magnetic part is annular and includes a center hole. The inner diameter of the mounting hole is set corresponding to the outer diameter of the magnetic part. The base is provided with a coupling hole from the second surface to the first surface. The coupling hole is connected to the mounting hole. The coupling hole is used to install a rotating shaft. The rotating shaft is passed through the coupling hole and the center hole.

4. The planar magnetic coupling for reducing axial suction as claimed in claim 3, characterized in that: The coupling hole is coaxially arranged with the mounting hole.

5. The planar magnetic coupling for reducing axial suction as claimed in claim 1, characterized in that: A magnetically conductive gasket is arranged between the magnet and the mounting surface. The magnetically conductive gasket is annular and is sleeved on the raised portion.

6. The planar magnetic coupling for reducing axial suction as claimed in claim 5, characterized in that: The magnetic conductive gasket is bonded to the mounting surface by glue.

7. The planar magnetic coupling for reducing axial suction as claimed in claim 1, characterized in that: The magnet is a multi-pole axially magnetized magnet, and is a ring-shaped magnet formed by splicing a number of magnetic sheets in a fan-ring structure.

8. The planar magnetic coupling for reducing axial suction as claimed in claim 1, characterized in that: The protection cover is threadedly connected to the base.

9. The planar magnetic coupling for reducing axial suction force according to claim 2 or 3, characterized in that: A threaded hole connected to the shaft coupling hole is also provided on the side surface of the base, and the threaded hole is used to fix the rotating shaft.

10. The planar magnetic coupling for reducing axial suction force according to claim 1, characterized in that: An upwardly extending retaining wall is provided at the edge of the mounting surface, a groove is formed between the retaining wall and the raised portion, and the magnet is embedded in the groove.

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