Magnetic coupler

Abstract

The present invention proposes a magnetic coupling comprising a first housing, a second housing disposed outside the first housing, a bearing disposed below the second housing and outside the first housing, a shaft housing disposed outside the second housing and the bearing, and a magnet and a hysteresis ring disposed between the second housing and the shaft housing. The magnet is fixed to the outside of the second housing, and the hysteresis ring is fixed to the inside of the shaft housing and corresponds to the magnet. The second housing is also provided with an adjustment member for adjusting the axial position of the second housing on the first housing. The magnetic coupling transmits torque to the shaft housing through the interaction between the magnet mounted on the second housing and the hysteresis ring mounted on the shaft housing, achieving non-contact torque transmission, and the magnitude of the transmitted torque is adjustable.

Description

Technical Field

[0001] The present invention relates to a transmission device, in particular to a magnetic coupler. Background Art

[0002] The operating principle of a magnetic coupling follows Coulomb's law of magnetism. This means that two magnets separated by a certain distance, due to the magnetic field induction effect, can transfer power from one magnet to the other through the coupling force of the magnets without any traditional mechanical components, forming a contactless torque transmission mechanism. A magnetic coupling consists of two parts: a conductive rotor connected to the prime mover and a magnetic rotor connected to the load. Existing magnetic couplings are difficult to adjust the torque, and this needs improvement. Summary of the Invention

[0003] The present invention provides a magnetic coupling, which solves the problem of torque regulation of magnetic couplings in the prior art.

[0004] The technical solution of the present invention is achieved as follows:

[0005] A magnetic coupler comprises a first sleeve, a second sleeve disposed outside the first sleeve, a bearing disposed below the second sleeve and outside the first sleeve, a shaft housing disposed outside the second sleeve and the bearing, and a magnet and a hysteresis ring disposed between the second sleeve and the shaft housing, wherein the magnet is fixed to the outside of the second sleeve, the hysteresis ring is fixed to the inside of the shaft housing and corresponds to the magnet, and the second sleeve is further provided with an adjusting member for adjusting the axial position of the second sleeve on the first sleeve;

[0006] A seat plate is provided between the top outer edge of the first sleeve and the top inner edge of the shaft housing, and a pressure plate is provided on the seat plate. The pressure plate and the seat plate are fixed by fixing screws passing through the first sleeve. The adjusting member includes a rod body passing through and threadedly connected to the second sleeve and a head end passing through the seat plate and the pressure plate. A locking screw is passed through one side of the seat plate, and the end thereof abuts against the head end of the adjusting member.

[0007] It also includes a friction sleeve arranged between the second sleeve body and the shaft housing, wherein the friction sleeve is arranged in the shaft housing, the outer wall of the friction sleeve is fixed to the shaft housing, and the inner wall and the second sleeve body form an axial sliding friction pair;

[0008] It also includes a friction sleeve arranged between the second sleeve body and the shaft housing. The friction sleeve is arranged in the shaft housing, its outer wall is fixed to the shaft housing, and its inner wall corresponds to the second sleeve body. The friction sleeve is located above the hysteresis ring.

[0009] A preferred solution is that the second sleeve is connected to the first sleeve via a spline.

[0010] A preferred solution is that the friction sleeve is a copper-based friction sleeve.

[0011] A preferred solution is that a groove is provided on the periphery of the second sleeve corresponding to the magnet, and the magnet is embedded in the groove.

[0012] The preferred solution is that the shaft housing is provided with a mounting groove corresponding to the hysteresis ring, and the hysteresis ring is embedded in the mounting groove. The beneficial effects of the present invention are:

[0013] The magnetic coupler of the present invention transmits torque to the shaft housing through the interaction between the magnet installed on the second sleeve and the hysteresis ring installed on the shaft housing, thereby realizing non-contact torque transmission, and the magnitude of the transmitted torque can be easily adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Schematic diagram of the structure of the magnetic coupler of the present invention.

[0016] In the picture:

[0017] 10. First housing; 20. Second housing; 30. Bearing; 50. Shaft housing; 60. Magnet; 70. Hysteresis ring; 80. Friction sleeve; 41. Seat plate; 42. Pressure plate; 43. Fixing screw; 90. Adjusting member; 91. Rod body; 93. Head end; 45. Locking screw. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, the magnetic coupling includes a first housing 10, a second housing 20 disposed outside the first housing 10, a bearing 30 disposed below the second housing 20 and outside the first housing 10, a shaft housing 50 disposed outside the second housing 20 and the bearing 30, and a magnet 60, a hysteresis ring 70, and a friction sleeve 80 disposed between the second housing 10 and the shaft housing 50. The magnet 60 is fixed to the outside of the second housing 10, the hysteresis ring 70 is fixed to the inside of the shaft housing 50 and corresponds to the magnet 60. The friction sleeve 80 is disposed inside the shaft housing 50 and above the hysteresis ring 70.

[0020] The second housing 20 is sleeved onto the center portion of the outer periphery of the first housing 10. In this embodiment, the second housing 20 and the first housing 10 are connected via a spline to achieve rigid torque transmission between the first and second housings 10, 20. A recess is provided on the outer periphery of the second housing 20 corresponding to the magnet 60, and the magnet 60 is embedded in the recess.

[0021] The shaft housing 50 has a mounting groove corresponding to the hysteresis ring 70 . The hysteresis ring 70 is embedded in the mounting groove and is disposed corresponding to the outer side of the magnet 60 .

[0022] The friction sleeve 80 is a copper-based friction sleeve located inside the shaft housing 50 and above the hysteresis ring 70. The inner wall of the friction sleeve 80 near its bottom end aligns with the second sleeve 20. The friction sleeve 80 and the shaft housing 50 are secured together by an interference fit. The inner wall of the friction sleeve 80 aligns with the outer wall of the top end of the second sleeve 20, forming an axial sliding friction pair.

[0023] A seat plate 41 is provided between the top outer edge of the first housing 20 and the top inner edge of the shaft housing 50. A pressure plate 42 is provided on the seat plate 41. The pressure plate 42 and the seat plate 41 are fixed to the first housing 20 by fixing screws 43, thereby forming a sealed space between the first housing 10 and the shaft housing 50 to accommodate the second housing 20, thereby preventing dust and other particulate matter from falling into the magnet 60 and the hysteresis ring 70 and causing them to become stuck.

[0024] The second housing 20 is also provided with an adjustment member 90 for adjusting the axial position of the second housing 20 on the first housing 10. This causes the magnet 60 mounted on the second housing 20 to axially displace relative to the hysteresis ring 70, thereby adjusting the coupling dimension between the magnet 60 and the hysteresis ring 70 and varying the coupling force, thereby adjusting the torque. The adjustment member 90 comprises a rod 91 threadedly disposed within the second housing 20 and a head 93 threadedly disposed within the seat plate 41 and the pressure plate 42. A locking screw 45 is provided on one side of the seat plate 41, the distal end of which abuts against the head 93 of the adjustment member 90, thereby restricting its rotation. To adjust the axial position of the second housing 20 on the first housing 10, the locking screw 45 is simply loosened to release the abutment against the head 93 of the adjustment member 90. The head 93 can then be rotated within the seat plate 41 using a tool.

[0025] During use, a shaft is connected to each of the first and second sleeves 10, 20. Torque is transmitted between the first and second sleeves 10, 20 via splines. The magnet 60 mounted on the second sleeve 20 interacts with the hysteresis ring 70 mounted on the shaft housing 50, transmitting the torque to the shaft housing 50. This allows the shaft connected to the first sleeve 10 and the shaft connected to the shaft housing 50 to drive each other. This magnetic coupling enables contactless torque transmission, and the magnitude of the transmitted torque is adjustable. It can be applied to different situations involving gears, sprockets, and synchronous pulleys, and can also be applied to the output shaft of a motor or reducer.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic coupler, characterized in that: The invention comprises a first sleeve, a second sleeve arranged outside the first sleeve, a bearing arranged below the second sleeve and outside the first sleeve, a shaft housing arranged outside the second sleeve and the bearing, and a magnet and a hysteresis ring arranged between the second sleeve and the shaft housing, wherein the magnet is fixed to the outside of the second sleeve, the hysteresis ring is fixed to the inside of the shaft housing and corresponds to the magnet, and the second sleeve is further provided with an adjusting member for adjusting the axial position of the second sleeve on the first sleeve; A seat plate is provided between the top outer edge of the first sleeve and the top inner edge of the shaft housing, and a pressure plate is provided on the seat plate. The pressure plate and the seat plate are fixed by fixing screws passing through the first sleeve. The adjusting member includes a rod body passing through and threadedly connected to the second sleeve and a head end passing through the seat plate and the pressure plate. A locking screw is passed through one side of the seat plate, and the end thereof abuts against the head end of the adjusting member. It also includes a friction sleeve arranged between the second sleeve body and the shaft housing, wherein the friction sleeve is arranged in the shaft housing, the outer wall of the friction sleeve is fixed to the shaft housing, and the inner wall and the second sleeve body form an axial sliding friction pair; It also includes a friction sleeve arranged between the second sleeve body and the shaft housing. The friction sleeve is arranged in the shaft housing, its outer wall is fixed to the shaft housing, and its inner wall corresponds to the second sleeve body. The friction sleeve is located above the hysteresis ring.

2. The magnetic coupler according to claim 1, wherein: The second sleeve body is connected to the first sleeve body through a spline.

3. The magnetic coupler according to any one of claims 1 to 2, characterized in that: The friction sleeve is a copper-based friction sleeve.

4. The magnetic coupler according to any one of claims 1 to 2, characterized in that: The periphery of the second sleeve is provided with a groove corresponding to the magnet, and the magnet is embedded in the groove.

5. The magnetic coupler according to any one of claims 1 to 2, characterized in that: The shaft housing is provided with a mounting groove corresponding to the hysteresis ring, and the hysteresis ring is embedded in the mounting groove.

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