Non-contact clutch

Abstract

The invention provides a non-contact clutch, and relates to the technical field of mechanical transmission structures. The clutch comprises an inner magnetic steel assembly and an outer magnetic steel assembly which are used for forming a stable magnetic field, a hysteresis transmission shaft arranged in the stable magnetic field and used for transmitting power, a first shell used for fixing the inner magnetic steel assembly, and a second shell used for fixing the outer magnetic steel assembly. The first supporting bearing is arranged on one side of the first shell and used for installing a clutch; and the second supporting bearing is arranged on one side of the second shell and used for installing the clutch. According to the non-contact clutch, power can be transmitted through the hysteresis effect of the hysteresis material, meanwhile, slipping is generated under the fixed load condition, and a transmission system of a mechanical product is better protected. The structure has the advantages of being free of abrasion during slipping, stable in power transmission and constant in slipping torque, meanwhile, the slipping torque of the clutch can be adjusted according to the force of a transmission system, the transmission system is better protected, the service life of the clutch is prolonged, and the fault risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission structures, and in particular provides a contactless clutch. Background Art

[0002] In the field of mechanical transmission, the clutch plays the role of preventing the transmission system from overloading, controlling power transmission and overload protecting the entire transmission system, and is therefore widely used in mechanical design.

[0003] Most traditional mechanical products use contact clutches, which are mainly composed of electromagnets, armatures, friction discs, compression springs and other parts. Traditional contact clutches use the elastic force of compression springs to squeeze the armature and friction disc together to form a continuous transmission rod system to transmit power. When the power transmission is interrupted, the electromagnet is energized to generate suction, which separates the armature and friction disc, and disconnects the power from the transmission rod system. When the load of the above-mentioned contact clutch increases, the armature and friction disc will gradually wear out, which will eventually affect the service life of the clutch; at the same time, if the load increases but the armature and friction disc do not slip and wear out, the transmission system of the mechanical product will be damaged by external forces. Summary of the invention

[0004] The purpose of this application is to solve the problem that the clutch wears when the load is too large, shortening the service life of the clutch, or the clutch gets stuck when the load is too large, causing damage to the transmission system. A contactless clutch structure is proposed to achieve the technical need of being able to adjust the slip torque of the clutch according to the size of the transmission system force to protect the transmission system and increase the service life of the clutch.

[0005] In order to achieve the above-mentioned objectives, the present invention adopts the following technical scheme: a contactless clutch, the clutch comprising an inner magnetic steel component and an outer magnetic steel component for forming a stable magnetic field, a hysteresis transmission shaft placed in the stable magnetic field for transmitting power, a first shell for fixing the inner magnetic steel component, a second shell for fixing the outer magnetic steel component, a first support bearing arranged on one side of the first shell for mounting the clutch, and a second support bearing arranged on one side of the second shell for mounting the clutch.

[0006] The contactless clutch provided by the present invention also has such a technical feature that the internal magnetic steel component includes an internal magnetic steel bracket and an internal magnetic steel structure arranged on the outer ring of the internal magnetic steel bracket for cooperating with the external magnetic steel component to form a magnetic field.

[0007] The contactless clutch provided by the present invention also has such a technical feature that the internal magnetic steel structure is an internal magnetic steel ring sleeved on the outer ring of the internal magnetic steel bracket or a plurality of internal magnetic steel sheets evenly distributed on the outer ring of the internal magnetic steel bracket.

[0008] The contactless clutch provided by the present invention also has such a technical feature that the external magnetic steel component includes an external magnetic steel bracket and an external magnetic steel structure arranged on the inner ring of the external magnetic steel bracket for cooperating with the internal magnetic steel component to form a magnetic field.

[0009] The contactless clutch provided by the present invention also has such a technical feature that the external magnetic steel structure is an external magnetic steel ring sleeved on the inner ring of the external magnetic steel bracket or a plurality of external magnetic steel sheets evenly distributed on the inner ring of the external magnetic steel bracket.

[0010] The contactless clutch provided by the present invention also has the following technical feature: the hysteresis transmission shaft is made of hysteresis alloy.

[0011] The contactless clutch provided by the present invention also has the technical feature that the number of inner magnetic steel sheets in the inner magnetic steel assembly is the same as the number of outer magnetic steel sheets in the outer magnetic steel assembly.

[0012] The contactless clutch provided by the present invention also has the technical feature that the magnetization amounts of the inner magnetic steel component and the outer magnetic steel component are the same.

[0013] Beneficial Effects

[0014] The contactless clutch proposed in the present invention can transmit power through the hysteresis effect of the hysteresis material, and at the same time produce slippage under fixed load conditions, so as to better protect the transmission system of the mechanical product. The structure has the advantages of no slippage and wear, stable power transmission, and constant slip torque. At the same time, the slip torque of the clutch can be adjusted according to the size of the transmission system force, so as to better protect the transmission system, increase the service life of the clutch, and reduce the risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of the contactless clutch provided by the present invention;

[0017] Figure 2 A cross-sectional view of an inner magnetic steel assembly provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of an inner magnetic steel assembly provided in an embodiment of the present invention;

[0019] Figure 4A schematic structural diagram of an inner magnetic steel assembly provided by another embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the structure of an external magnetic steel assembly provided in an embodiment of the present invention;

[0021] Figure 6 A schematic structural diagram of an external magnetic steel assembly provided in another embodiment of the present invention;

[0022] Figure 7 A cross-sectional view of a magnetic steel assembly provided by an embodiment of the present invention,

[0023] Among them, 1: inner magnetic steel assembly; 11: inner magnetic steel bracket; 12: inner magnetic steel structure; 121: inner magnetic steel ring; 122: inner magnetic steel sheet; 2: outer magnetic steel assembly; 21: outer magnetic steel bracket; 22: outer magnetic steel structure; 221: outer magnetic steel ring; 222: outer magnetic steel sheet; 3: hysteresis transmission shaft; 4: first shell; 5: second shell; 6: first support bearing; 7: second support bearing. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and examples, but it should be noted that these implementation methods are not limitations of the present application, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these implementation methods are all within the scope of protection of the present application.

[0025] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the creation of the present application and simplifying the description, and do not indicate or imply 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 on the creation of the present application.

[0026] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0027] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of this application can be understood by specific circumstances.

[0028] like Figure 1-7 As shown, the embodiment of the present application provides a contactless clutch, which includes an inner magnetic steel component 1 and an outer magnetic steel component 2 for forming a stable magnetic field, a hysteresis transmission shaft 3 placed in the stable magnetic field for transmitting power, a first housing 4 for fixing the inner magnetic steel component 1, a second housing 5 for fixing the outer magnetic steel component 2, a first support bearing 6 for mounting the clutch provided on one side of the first housing 4, and a second support bearing 7 for mounting the clutch provided on one side of the second housing 5. The outer magnetic steel component 2 can be adjusted in position through the arc-shaped screw hole on the second housing 5.

[0029] In the above embodiment, the inner magnetic steel component 1 and the outer magnetic steel component 2 are concentrically assembled to the first shell 4 and the second shell 5, and a stable annular magnetic field is formed in the gap between the inner magnetic steel component 1 and the outer magnetic steel component 2. The hysteresis transmission shaft 3 is subjected to a hysteresis torque in the stable magnetic field. When the force output by the hysteresis transmission shaft 3 is less than the hysteresis torque, the output can be stable; when the force output by the hysteresis transmission shaft 3 is greater than the hysteresis torque, the hysteresis transmission shaft 3 slips in the gap between the inner magnetic steel component 1 and the outer magnetic steel component 2, and rotates relative to the inner magnetic steel component 1 and the outer magnetic steel component 2.

[0030] The contactless clutch provided in the above embodiment can change the size of the annular magnetic field between the inner and outer magnetic steel components by adjusting the relative positions of the two, thereby changing the hysteresis torque applied to the hysteresis output shaft 3. When the external force applied to the hysteresis transmission shaft 3 is greater than the hysteresis torque of the stable magnetic field, the output shaft and the inner and outer magnetic steel components move relative to each other, causing slippage, which plays a protective role; when the external force applied to the hysteresis transmission shaft 3 is less than the hysteresis torque of the stable magnetic field, the output shaft and the inner and outer magnetic steel components rotate synchronously to output the transmission torque.

[0031] In some embodiments, the inner magnetic steel assembly 1 includes an inner magnetic steel support 11 and an inner magnetic steel structure 12 disposed on the outer ring of the inner magnetic steel support 11 for forming a magnetic field with the outer magnetic steel assembly. The inner magnetic steel structure 12 is bonded to the outer ring of the magnetic steel support 11 to form a part of a stable magnetic circuit.

[0032] In some embodiments, the inner magnetic steel structure 12 is an inner magnetic steel ring 121 sleeved on the outer ring of the inner magnetic steel bracket or a plurality of inner magnetic steel sheets 122 uniformly distributed on the outer ring of the inner magnetic steel bracket 11. The inner magnetic steel structure 12 can be composed of a whole inner magnetic steel ring 121, or it can be composed of a plurality of inner magnetic steel sheets 122. When the required hysteresis torque is constant and known, a whole inner magnetic steel ring 121 can be selected and magnetized as needed. When the required hysteresis torque is unclear or the required hysteresis torque is a range value, a suitable number of inner magnetic steel sheets 122 can be selected to form the inner magnetic steel structure 12.

[0033] In some embodiments, the outer magnetic steel component 2 includes an outer magnetic steel support 21 and an outer magnetic steel structure 22 disposed in the inner circle of the outer magnetic steel support 21 for forming a magnetic field with the inner magnetic steel component 1. The outer magnetic steel structure 22 is bonded to the inner circle of the magnetic steel support 21 to form another part of constructing a stable magnetic circuit.

[0034] In some embodiments, the outer magnetic steel structure 22 is an outer magnetic steel ring 221 sleeved on the inner ring of the outer magnetic steel bracket 21 or a plurality of outer magnetic steel sheets 222 uniformly distributed on the inner ring of the outer magnetic steel bracket 21. The outer magnetic steel structure 22 can be composed of a whole outer magnetic steel ring 221, or can be composed of a plurality of outer magnetic steel sheets 222. When the required hysteresis torque is constant and known, a whole outer magnetic steel ring 221 can be selected and magnetized as needed. When the required hysteresis torque is unclear or the required hysteresis torque is a range value, a suitable number of outer magnetic steel sheets 222 can be selected to form the outer magnetic steel structure 22.

[0035] In some embodiments, the hysteresis transmission shaft 3 is made of hysteresis alloy. The hysteresis transmission shaft 3 can adjust the length of the working area according to the working length of the inner magnetic steel component 1 and the outer magnetic steel component 2.

[0036] In some embodiments, the number of the inner magnetic steel sheets 122 in the inner magnetic steel assembly 1 is the same as the number of the outer magnetic steel sheets 222 in the outer magnetic steel assembly 2. When the number of the inner magnetic steel sheets 122 is the same as the number of the outer magnetic steel sheets 222, the area of ​​the facing region of the inner magnetic steel sheets 122 and the outer magnetic steel sheets 222 can be adjusted. When the facing area of ​​the inner magnetic steel sheets 122 and the outer magnetic steel sheets 222 is the largest, the magnetic flux density of the annular magnetic field formed by the inner magnetic steel assembly 1 and the outer magnetic steel assembly 2 is the largest, and the torque that can be transmitted by the hysteresis transmission shaft 1 is the largest; when the facing area of ​​the inner magnetic steel sheets 122 and the outer magnetic steel sheets 222 is the smallest, the magnetic flux density of the annular magnetic field formed by the inner magnetic steel assembly 1 and the outer magnetic steel assembly 2 is the smallest, and the torque that can be transmitted by the hysteresis transmission shaft 1 is the smallest.

[0037] In some embodiments, the magnetization amounts of the inner magnetic steel component 1 and the outer magnetic steel component 2 are the same.

[0038] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A contactless clutch, characterized in that: The clutch includes an inner magnetic steel component and an outer magnetic steel component for forming a stable magnetic field, a hysteresis transmission shaft placed in the stable magnetic field for transmitting power, a first shell for fixing the inner magnetic steel component, a second shell for fixing the outer magnetic steel component, a first support bearing arranged on one side of the first shell for mounting the clutch, and a second support bearing arranged on one side of the second shell for mounting the clutch.

2. The contactless clutch according to claim 1, characterized in that: The inner magnetic steel component includes an inner magnetic steel bracket and an inner magnetic steel structure arranged on the outer ring of the inner magnetic steel bracket and used for cooperating with the outer magnetic steel component to form a magnetic field.

3. The contactless clutch according to claim 2, characterized in that: The inner magnetic steel structure is an inner magnetic steel ring sleeved on the outer ring of the inner magnetic steel bracket or a plurality of inner magnetic steel sheets evenly distributed on the outer ring of the inner magnetic steel bracket.

4. The contactless clutch according to claim 1, characterized in that: The outer magnetic steel assembly includes an outer magnetic steel bracket and an outer magnetic steel structure arranged on the inner circle of the outer magnetic steel bracket and used for cooperating with the inner magnetic steel assembly to form a magnetic field.

5. The contactless clutch according to claim 4, characterized in that: The external magnetic steel structure is an external magnetic steel ring sleeved on the inner ring of the external magnetic steel bracket or a plurality of external magnetic steel sheets evenly distributed on the inner ring of the external magnetic steel bracket.

6. The contactless clutch according to claim 1, characterized in that: The hysteresis transmission shaft is made of hysteresis alloy.

7. The contactless clutch according to claim 1, characterized in that: The number of inner magnetic steel sheets in the inner magnetic steel assembly is the same as the number of outer magnetic steel sheets in the outer magnetic steel assembly.

8. The contactless clutch according to claim 1, characterized in that: The magnetization amounts of the inner magnetic steel component and the outer magnetic steel component are the same.

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