A coupling for soft connection load

Abstract

The present invention provides a coupling for soft-connection load, belonging to the field of mechanical technology. The coupling includes a housing, an input shaft rotatably connected to the housing, and an output shaft rotatably connected to the housing. A mounting disk located in the housing is fixedly arranged on the input shaft, a contact disk is fixedly arranged on the inner side of the mounting disk, and a conical mounting hole is provided in the middle of the contact disk. A contact column slidably connected in the mounting hole is provided on the control disk, and the circumference of the contact column is adapted to the side wall of the mounting hole. A friction disk facing the inner side of the control disk is fixedly arranged on the output shaft, and a plurality of winding columns are provided on the circumference of the control disk, each winding column is wound with a coil 1, and a permanent magnet block corresponding to the winding column is provided on the inner wall of the housing. A coil 2 is also wound on the control disk, and the coil 2 is wound around the circumference of the control disk. After each coil 1 is connected in series, a reflux is formed with the coil 2. The coupling can realize soft-connection load and has the advantages of braking function.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a coupling with a soft connection load. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, and rotates together 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, playing the role of overload protection.

[0003] However, the existing coupling can only achieve overload disengagement and separation, and cannot protect the torque input end during startup. The reverse torque at the load end can easily cause damage to the torque input end (such as a motor). The existing coupling also cannot achieve load braking and torque input braking, and it is necessary to set up braking systems at the load end and the torque input end respectively. Summary of the invention

[0004] The purpose of the present invention is to provide a coupling with a soft connection load in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to achieve a soft connection between the input end and the output end.

[0005] The object of the present invention can be achieved through the following technical solutions: a coupling with a soft connection load, characterized in that the coupling comprises a shell, an input shaft rotatably connected to the shell and an output shaft rotatably connected to the shell, the input shaft is fixedly provided with a mounting disk located in the shell, the inner side surface of the mounting disk is fixedly provided with a contact disk, the middle part of the contact disk has a conical mounting hole, the large diameter end of the mounting hole faces one side of the mounting disk, a control disk is slidably connected to the outside of the mounting disk, the control disk has a contact column slidably connected in the mounting hole, the circumferential surface of the contact column is adapted to the side wall of the mounting hole, the output shaft is fixedly provided with a friction disk facing the inner side surface of the control disk, a plurality of winding columns are provided on the circumferential surface of the control disk, each winding column is wound with a coil 1, the inner wall of the shell has a permanent magnet block corresponding to the winding column, the control disk is also wound with a coil 2, the coil 2 is wound around the circumferential surface of the control disk, and each coil 1 is connected in series to form a reflux with the coil 2.

[0006] The winding method of coil 1 is: it is wound on the winding column along the axial direction of the input shaft. When coil 1 is energized, the inserted Lorentz force is directed toward the tangent direction of the control disk, so that the permanent magnet block and coil 1 form a magnetoelectric structure.

[0007] During the rotation of the control disk, a current is formed in coil one, and this current is connected to coil two, so that coil two and the control disk form an electromagnetism structure, and a magnetic force is inserted with the magnetic pole direction parallel to the axis of the input shaft. This magnetic force acts on the friction disk, which is made of iron material, and can make the control disk approach the friction disk. The faster the control disk rotates, the greater the clamping force between the friction disk and the control disk.

[0008] The input shaft is connected to a power source such as a motor, and the output shaft is connected to a load. When the input shaft starts to rotate, there is relative movement between the control disk and the mounting disk that are slidably connected to the mounting disk. That is, when the contact column is not subjected to an extrusion force in the direction of the mounting hole, the relative friction between the contact column and the wall of the mounting hole is small, and the control disk cannot quickly rotate synchronously with the mounting disk. The control disk rotates at a relatively low speed. The rotation of the control disk can generate electricity in coil one. After coil two is energized, the control disk can generate a clamping force in the direction of the friction disk. The existence of the clamping force increases the relative friction between the contact column and the wall of the mounting hole, driving the control disk to speed up. In the process of contacting the friction disk, the speed of the control disk is reduced due to the existence of the friction disk resistance, and this is repeated until the speeds of the control disk, the input shaft and the friction disk are consistent, thereby achieving a soft connection between the input end and the output end, avoiding damage due to a large reverse torque at the input end, and protecting the input end and the output end when the output end is overloaded.

[0009] During braking, the speed of the control disc decreases, and the clamping force between the control disc and the friction disc decreases, achieving slow braking and avoiding severe wear and high temperature problems caused by rigid braking.

[0010] In this solution, the limit clamping force between the control disk and the friction disk corresponds to the rotational speed of the input shaft. The faster the input shaft rotates, the greater the clamping force. The conventional coupling has a constant binding force, which poses a safety hazard under high-speed operation. To avoid the problem of weak binding force of conventional couplings under high-speed operation, by selecting the number of turns of coil one and coil two, this coupling can be suitable for power connection under different speeds. Generally, this coupling has obvious advantages under high-speed operation.

[0011] The contact plate is made up of a number of fan-shaped small pieces, so that the contact column can be located in the mounting hole.

[0012] The binding force weakens when the input shaft speed decreases, causing relative movement between friction plate 1 and friction plate 2 due to the speed difference, thus forming braking force.

[0013] In the above-mentioned coupling with a soft connection load, a friction plate 1 is arranged on the inner side surface of the control disc, and a friction plate 2 is arranged on the side surface of the friction disc directly facing the friction plate 1.

[0014] The friction plates 1 and 2 with wear resistance do not have a magnetic shielding effect, such as asbestos fiber materials.

[0015] In the above-mentioned coupling with soft connection load, a plurality of guide holes are opened on the outer peripheral surface of the mounting plate, a steel ball is slidably connected in the guide hole, a compression spring in a compressed state is connected between the steel ball and the bottom of the guide hole, a conical step hole is provided on the control plate, the steel ball abuts against the side wall of the step hole, the large diameter end of the step hole is away from the input shaft, and a plurality of limit protrusions are arranged at equal intervals on the side wall of the step hole, and the limit protrusions are in the shape of triangular sheets.

[0016] The existence of the step hole can make the control disk away from the friction disk without being affected by external force, thereby realizing the separation of the friction disk and the control disk, that is, the separation of friction plate one and friction plate two. Long-term contact is not conducive to the heat dissipation of friction plate one and friction plate two and the discharge of friction chips. The existence of the limiting protrusion can improve the bonding strength between the control disk and the mounting disk, and increase the synchronization speed of the two. The triangular limiting protrusion has a thickness that gradually decreases from the outer end to the inner end, so that the steel ball can smoothly return to the large diameter end of the step hole, thereby realizing the separation between the two without the action of external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of this coupling.

[0018] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0019] Figure 3 It is a partial stereoscopic view of the step hole.

[0020] In the figure, 1. input shaft; 2. output shaft; 31. mounting plate; 32. contact plate; 33. mounting hole; 34. control plate; 35. contact column; 36. friction plate; 37. coil one; 38. coil two; 39. guide hole; 41. steel ball; 42. compression spring; 43. step hole; 44. limiting protrusion; 5. permanent magnet block; 6. housing; 71. friction plate one; 72. friction plate two. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1 and Figure 2As shown, the coupling comprises a housing 6, an input shaft 1 rotatably connected to the housing 6, and an output shaft 2 rotatably connected to the housing 6, a mounting plate 31 located in the housing 6 is fixedly arranged on the input shaft 1, a contact plate 32 is fixedly arranged on the inner side of the mounting plate 31, a tapered mounting hole 33 is provided in the middle of the contact plate 32, a large diameter end of the mounting hole 33 faces one side of the mounting plate 31, a control plate 34 is slidably connected to the outside of the mounting plate 31, and the control plate 34 has a sliding connection to the mounting hole 33 The contact column 35 inside, the circumference of the contact column 35 is adapted to the side wall of the mounting hole 33, a friction plate 36 facing the inner side surface of the control disk 34 is fixedly arranged on the output shaft 2, a plurality of winding columns are arranged on the circumference of the control disk 34, each winding column is wound with a coil 1 37, a permanent magnet block 5 corresponding to the winding column is provided on the inner wall of the shell 6, a coil 2 38 is also wound on the control disk 34, and the coil 2 38 is wound around the circumference of the control disk 34, and each coil 1 37 is connected in series to form a reflux with the coil 2 38.

[0023] The winding method of coil 1 37 is as follows: it is wound on the winding column along the axial direction of the input shaft 1. When coil 1 37 is energized, the inserted Lorentz force is directed toward the tangential direction of the control disk 34, so that the permanent magnet block 5 and coil 1 37 form a magnetoelectric structure.

[0024] During the rotation of the control disk 34, a current is formed in the coil 1 37, and the current is connected to the coil 2 38, so that the coil 2 38 and the control disk 34 form an electromagnetism structure, and a magnetic force is inserted with the magnetic pole direction parallel to the axis of the input shaft 1. The magnetic force acts on the friction disk 36, and the friction disk 36 is made of iron material, which can make the control disk 34 approach the direction of the friction disk 36. The faster the control disk 34 rotates, the greater the clamping force between the friction disk 36 and the control disk 34.

[0025] The input shaft 1 is connected to a power source such as a motor, and the output shaft 2 is connected to a load. When the input shaft 1 starts to rotate, there is a relative movement between the control disk 34 slidably connected to the mounting disk 31 and the mounting disk 31, that is, when the contact column 35 is not subjected to an extrusion force in the direction of the mounting hole 33, the relative friction between the contact column 35 and the wall of the mounting hole 33 is small, and the control disk 34 cannot quickly rotate synchronously with the mounting disk 31. The control disk 34 rotates at a relatively low speed. The rotation of the control disk 34 can generate electricity in the coil 1 37, and the coil 2 38 can make the control disk 34 rotate after being energized. 34 generates a clamping force in the direction of the friction disk 36. The existence of the clamping force increases the relative friction between the contact column 35 and the wall of the mounting hole 33, driving the speed of the control disk 34 to increase. In the process of contacting with the friction disk 36, the speed of the control disk 34 is reduced due to the resistance of the friction disk 36. This is repeated until the speeds of the control disk 34, the input shaft 1 and the friction disk 36 are consistent, thereby achieving a soft connection between the input end and the output end, avoiding damage to the input end due to large reverse torque, and protecting the input end and the output end when the output end is overloaded.

[0026] During braking, the rotation speed of the control disc 34 is reduced, and the clamping force between the control disc 34 and the friction disc 36 is reduced, so that slow braking is achieved and serious wear and high temperature problems caused by rigid braking are avoided.

[0027] In this solution, the limit clamping force between the control disk 34 and the friction disk 36 corresponds to the rotational speed of the input shaft 1. The faster the rotational speed of the input shaft 1, the greater the clamping force. The conventional coupling has a constant binding force, which poses a safety hazard under high-speed operation. To avoid the problem of weak binding force of the conventional coupling under high-speed operation, the coupling can be made suitable for power connection under different rotational speeds by selecting the number of turns of coil 1 37 and coil 2 38. Generally, the coupling has obvious advantages under high-speed operation.

[0028] The contact plate 32 is formed by splicing a plurality of fan-shaped small pieces so that the contact pin 35 can be located in the mounting hole 33 .

[0029] A spacer made of magnetic shielding material between coil one and coil two.

[0030] A friction plate 1 71 is disposed on the inner side of the control disc 34, and a friction plate 2 72 is disposed on the side of the friction disc 36 directly opposite to the friction plate 1 71. The friction plate 1 71 and the friction plate 2 72 with wear resistance do not have a magnetic shielding effect, such as asbestos fiber material.

[0031] like Figure 1 and Figure 3 As shown, a plurality of guide holes 39 are provided on the outer peripheral surface of the mounting plate 31, a steel ball 41 is slidably connected in the guide hole 39, a compression spring 42 is connected between the steel ball 41 and the bottom of the guide hole 39, a conical step hole 43 is provided on the control plate 34, the steel ball 41 abuts against the side wall of the step hole 43, the large diameter end of the step hole 43 is away from the input shaft 1, and a plurality of limit protrusions 44 are evenly spaced on the side wall of the step hole 43, and the limit protrusions 44 are in the shape of triangular sheets. The presence of the step hole 43 can make the control disk 34 away from the friction disk 36 without being affected by external forces, thereby realizing the separation of the friction disk 36 and the control disk 34, that is, the separation of the friction plate 1 71 and the friction plate 2 72. Long-term contact is not conducive to the heat dissipation of the friction plate 1 71 and the friction plate 2 72 and the discharge of friction chips. The presence of the limiting protrusion 44 can improve the bonding strength between the control disk 34 and the mounting disk 31, and increase the synchronization speed of the two. The triangular limiting protrusion 44 has a thickness that gradually decreases from the outer end to the inner end, so that the steel ball 41 can smoothly return to the large diameter end of the step hole 43, thereby realizing the separation between the two without the action of external forces.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A coupling for soft connection load, characterized in that: The coupling comprises a housing (6), an input shaft (1) rotatably connected to the housing (6), and an output shaft (2) rotatably connected to the housing (6); a mounting plate (31) located inside the housing (6) is fixedly arranged on the input shaft (1); a contact plate (32) is fixedly arranged on the inner side surface of the mounting plate (31); a conical mounting hole (33) is provided in the middle of the contact plate (32); a large diameter end of the mounting hole (33) faces one side of the mounting plate (31); a control plate (34) is slidably connected to the outside of the mounting plate (31); the control plate (34) has a contact plate (32) slidably connected to the mounting hole (33) A contact column (35) is provided inside the housing (6), the circumference of the contact column (35) being adapted to the side wall of the mounting hole (33), a friction plate (36) being fixedly provided on the output shaft (2) and facing the inner side surface of the control plate (34), a plurality of winding columns being provided on the circumference of the control plate (34), each winding column being wound with a coil 1 (37), a permanent magnet block (5) corresponding to the winding column being provided on the inner wall of the housing (6), a coil 2 (38) being wound on the control plate (34), the coil 2 (38) being wound around the circumference of the control plate (34), and each coil 1 (37) being connected in series to form a reflux with the coil 2 (38); The contact plate (32) is formed by splicing together a number of fan-shaped small pieces; A plurality of guide holes (39) are formed on the outer circumferential surface of the mounting plate (31), a steel ball (41) is slidably connected in the guide hole (39), a compression spring (42) in a compressed state is connected between the steel ball (41) and the bottom of the guide hole (39), a conical step hole (43) is formed on the control plate (34), the steel ball (41) abuts against the side wall of the step hole (43), the large diameter end of the step hole (43) is away from the input shaft (1), and a plurality of limiting protrusions (44) are arranged at equal intervals on the side wall of the step hole (43), the limiting protrusions (44) being in the shape of triangular sheets.

2. A coupling for soft connection load according to claim 1, characterized in that: A friction plate 1 (71) is provided on the inner side surface of the control disk (34), and a friction plate 2 (72) is provided on the side surface of the friction disk (36) directly opposite to the friction plate 1 (71).

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