Permanent magnet rotor with high-temperature protection and permanent magnet torque limiter

Abstract

The invention discloses a permanent magnet rotor with high-temperature protection and a permanent magnet torque limiter. The permanent magnet rotor with high-temperature protection comprises a molded surface shaft; the memory spring assembly is mounted on the outer surface of the profile shaft; the profile shaft is sleeved with the first magnet disc assembly, and the first magnet disc assembly abuts against one end of the memory spring assembly; and the second magnet disc assembly is arranged on the molded surface shaft in a sleeving manner and abuts against the other end of the memory spring assembly. When the temperature rises to exceed the deformation temperature of the memory spring assembly, the memory spring assembly deforms; a force is provided for the first magnet disc assembly to bring the first magnet disc assembly close to the second magnet disc assembly and / or a force is provided for the second magnet disc assembly to bring the second magnet disc assembly close to the first magnet disc assembly.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet torque limiters, and in particular to a permanent magnet rotor with high temperature protection and a permanent magnet torque limiter. Background Art

[0002] Compared with other types of torque limiters, permanent magnet torque limiters have the advantages of high overload accuracy, automatic reset, frequent overload, no need for spare parts, and long service life, so they are widely used.

[0003] However, there is a fatal problem, namely, overload heating. For example, the rated torque of a permanent magnetic torque limiter is M. When the transmitted torque exceeds 2M, overload protection occurs, which is fine; however, when the torque transmitted by the device is continuously between M and 2M, the permanent magnetic torque limiter cannot be disengaged and continues to heat up, which will eventually cause damage to the device. The current solution to this problem is to add a temperature sensor for detection, but there is no technical solution that can automatically prevent the two magnetic disks from approaching each other. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a permanent magnet rotor with high temperature protection.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A permanent magnet rotor with high temperature protection, the permanent magnet rotor with high temperature protection comprising:

[0007] Profile axis;

[0008] A memory spring assembly, the memory spring assembly being mounted on the outer surface of the profile shaft;

[0009] A first magnet disk assembly, wherein the first magnet disk assembly is sleeved on the profile shaft and abuts against one end of the memory spring assembly;

[0010] A second magnet disk assembly, wherein the second magnet disk assembly is sleeved on the profile shaft and abuts against the other end of the memory spring assembly; wherein, when the temperature of the memory spring assembly is equal to or greater than the deformation temperature of the memory spring assembly, the memory spring assembly deforms and provides a force for the first magnet disk assembly to move the first magnet disk assembly close to the second magnet disk assembly and / or provides a force for the second magnet disk assembly to move the second magnet disk assembly close to the first magnet disk assembly.

[0011] Optionally, the memory spring assembly comprises:

[0012] a baffle connected to the profile shaft;

[0013] A pin assembly, the pin assembly is mounted on the outer surface of the profile shaft, the pin assembly comprises a first pin and a second pin, one end of the first pin is connected to one side of the baffle, and one end of the second pin is connected to the other side of the baffle;

[0014] a first memory spring, wherein the first memory spring is sleeved on the first pin shaft and one end of the first memory spring abuts against the first magnet disk assembly, and the other end of the first memory spring abuts against one side of the baffle;

[0015] A second memory spring is sleeved on the second pin shaft and one end of the second memory spring abuts against the second magnet disk assembly, and the other end of the second memory spring abuts against the other side of the baffle.

[0016] Optionally, the profile shaft includes a flange and a profile sleeve, and the memory spring assembly is arranged on the outer surface of the profile sleeve.

[0017] Optionally, the radial cross-section of the profile sleeve is one of a 4-sided, a 6-sided and an 8-sided type.

[0018] Optionally, the number of the memory spring assemblies is the same as the number of sides of the radial cross-section of the profile sleeve, and one memory spring assembly is arranged on one surface of the profile sleeve.

[0019] Optionally, each surface of the profile sleeve is provided with a baffle groove, and the baffle groove is formed by extending vertically from the outer surface of the profile sleeve toward the central axis direction of the profile sleeve;

[0020] The baffle portion is disposed in the baffle groove.

[0021] Optionally, the first magnet disk assembly is provided with a first magnet disk hole for accommodating a portion of the first pin shaft;

[0022] The second magnetic disk assembly is provided with a second magnetic disk for accommodating a portion of the second pin shaft;

[0023] One end of each of the first pins is disposed in the first magnet disk hole;

[0024] One end of each of the second pins is disposed in the second magnet disk hole;

[0025] Each of the memory spring assemblies is disposed between the first magnet disk aperture and the second magnet disk aperture.

[0026] The present application also provides a permanent magnet torque limiter, which includes the permanent magnet rotor with high temperature protection as described above.

[0027] The present invention has the following beneficial effects:

[0028] The permanent magnet rotor with high temperature protection of the present invention is provided with a memory spring assembly between the first magnet disk assembly and the second magnet disk assembly. When the temperature rises to a temperature exceeding the deformation temperature of the memory spring assembly, the memory spring assembly will deform due to the excessive temperature, thereby providing the first magnet disk assembly with a force to make the first magnet disk assembly close to the second magnet disk assembly and / or providing the second magnet disk assembly with a force to make the second magnet disk assembly close to the first magnet disk assembly, thereby pulling the two magnet disk assemblies closer to the baffle, thereby disengaging the permanent magnet torque limiter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a permanent magnet rotor with high temperature protection in the first embodiment of the present application;

[0030] Figure 2 Schematic diagram of the structure of the permanent magnet torque limiter in the first embodiment of the present application.

[0031] Legend:

[0032] 1. Profile shaft; 2. Memory spring assembly; 3. First magnet disk assembly; 4. Second magnet disk assembly; 21. Baffle; 22. First pin shaft; 23. Second pin shaft; 24. First memory spring; 25. Second memory spring; 11. Flange; 12. Profile sleeve; 31. First magnet disk hole; 32. Second magnet disk hole;

[0033] 10. Permanent magnet rotor; 20. Conductor rotor. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of this application, it should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] like Figure 1 The permanent magnet rotor with high temperature protection shown comprises a profile shaft 1, a memory spring assembly 2, a first magnet disk assembly 3 and a second magnet disk assembly 4; wherein the memory spring assembly 2 is mounted on the outer surface of the profile shaft 1;

[0036] The first magnetic disk assembly 3 is sleeved on the profile shaft 1 and abuts against one end of the memory spring assembly 2;

[0037] The second magnet disk assembly 3 is sleeved on the profile shaft and abuts against the other end of the memory spring assembly 2; wherein, when the temperature of the memory spring assembly is equal to or greater than the deformation temperature of the memory spring assembly, the memory spring assembly deforms and provides a force for the first magnet disk assembly to move the first magnet disk assembly close to the second magnet disk assembly and / or provides a force for the second magnet disk assembly to move the second magnet disk assembly close to the first magnet disk assembly.

[0038] The permanent magnet rotor with high temperature protection of the present invention is provided with a memory spring assembly between the first magnet disk assembly and the second magnet disk assembly. When the temperature rises to a temperature exceeding the deformation temperature of the memory spring assembly, the memory spring assembly will deform due to the excessive temperature, thereby providing the first magnet disk assembly with a force to make the first magnet disk assembly close to the second magnet disk assembly and / or providing the second magnet disk assembly with a force to make the second magnet disk assembly close to the first magnet disk assembly, thereby pulling the two magnet disk assemblies closer to the baffle, thereby disengaging the permanent magnet torque limiter.

[0039] In this embodiment, the memory spring assembly 2 includes a baffle 21, a pin assembly, a first memory spring 24 and a second memory spring 25, wherein the baffle 21 is connected to the profile shaft 1;

[0040] The pin assembly is installed on the outer surface of the profile shaft 1, and the pin assembly includes a first pin 22 and a second pin 23, one end of the first pin 22 is connected to one side of the baffle 21, and one end of the second pin 23 is connected to the other side of the baffle 21;

[0041] The first memory spring 24 is sleeved on the first pin shaft 22 and one end of the first memory spring 24 abuts against the first magnet disk assembly 3, and the other end of the first memory spring 24 abuts against one side of the baffle 21;

[0042] The second memory spring 25 is sleeved on the second pin shaft 23 and one end of the second memory spring 25 abuts against the second magnet disk assembly 4 , while the other end of the second memory spring 25 abuts against the other side of the baffle 21 .

[0043] In actual working state, both magnetic disk assemblies may not heat up, but one of them may heat up, and then the memory spring on one side can be contracted, while the other side can still work normally. Therefore, by setting the baffle, the memory springs on both sides will not interfere with each other.

[0044] In addition, the baffle of the present application is made of heat-insulating material, so that the heat on one side is not easily transferred to the other side.

[0045] In this embodiment, the profile shaft 1 includes a flange 11 and a profile sleeve 12 , and the memory spring assembly is arranged on the outer surface of the profile sleeve 12 .

[0046] In this embodiment, the radial cross section of the profile sleeve 12 is one of a four-sided shape, a six-sided shape, and an eight-sided shape.

[0047] In this embodiment, the number of the memory spring assemblies 2 is the same as the number of radial cross sections of the profile sleeve 12 , and one memory spring assembly 2 is disposed on one surface of the profile sleeve 12 .

[0048] In this embodiment, a baffle groove is provided on each surface of the profile sleeve 12, and the baffle groove is formed by extending vertically from the outer surface of the profile sleeve 12 to the central axis direction of the profile sleeve 12;

[0049] The baffle plate 21 is partially disposed in the baffle plate groove.

[0050] In this embodiment, the baffle 21 is fixedly mounted on the profile sleeve by means of screws or rivets.

[0051] In this embodiment, the baffle is mainly subjected to the force in the axial direction of the profile sleeve, so the fixing screws or rivets of the baffle do not need to consider the force of the baffle, and only play the role of overcoming the centrifugal force. Safe and convenient.

[0052] In this embodiment, the axis of the first pin shaft and the axis of the second pin shaft are both parallel to the axis of the profile sleeve.

[0053] In this embodiment, the centers of the first magnet disk assembly and the second magnet disk assembly are provided with the same profile that matches the profile of the profile sleeve.

[0054] See also Figure 1 as well as Figure 2 In this embodiment, the first magnet disk assembly 3 is provided with a first magnet disk hole 31 for accommodating a portion of the first pin shaft 22;

[0055] The second magnet disk assembly 4 is provided with a second magnet disk hole 32 for accommodating a portion of the second pin shaft 23;

[0056] One end of each first pin shaft 22 is disposed in the first magnet disk hole 31;

[0057] One end of each second pin shaft 23 is disposed in the second magnet disk hole 32;

[0058] Each memory spring assembly 2 is disposed between the first magnet disk hole 31 and the second magnet disk hole 32 .

[0059] In this embodiment, the first magnet disk assembly 3 and the second magnet disk assembly 4 can slide freely in the axial direction of the profile sleeve.

[0060] See also Figure 2 The present application also provides a permanent magnet torque limiter, which includes the permanent magnet rotor 10 with high temperature protection and the conductor rotor 20 as described above, wherein the conductor rotor 20 is the same as the prior art and will not be described in detail herein.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permanent magnet rotor with high temperature protection, characterized in that: The permanent magnet rotor with high temperature protection comprises: Profile axis (1); A memory spring assembly (2), the memory spring assembly (2) being mounted on the outer surface of the profile shaft (1); A first magnetic disk assembly (3), wherein the first magnetic disk assembly (3) is sleeved on the profile shaft (1) and abuts against one end of the memory spring assembly (2); A second magnet disk assembly (4), the second magnet disk assembly (4) is sleeved on the profile shaft and abuts against the other end of the memory spring assembly (2); wherein: When the temperature of the memory spring assembly is equal to or greater than the deformation temperature of the memory spring assembly, the memory spring assembly deforms and provides a force for the first magnet disk assembly to move the first magnet disk assembly close to the second magnet disk assembly and / or provides a force for the second magnet disk assembly to move the second magnet disk assembly close to the first magnet disk assembly.

2. The permanent magnet rotor with high temperature protection according to claim 1, characterized in that: The memory spring assembly (2) comprises: a baffle (21), the baffle (21) being connected to the profile shaft (1); a pin shaft assembly, the pin shaft assembly being mounted on the outer surface of the profile shaft (1), the pin shaft assembly comprising a first pin shaft (22) and a second pin shaft (23), one end of the first pin shaft (22) being connected to one side of the baffle plate (21), and one end of the second pin shaft (23) being connected to the other side of the baffle plate (21); a first memory spring (24), the first memory spring (24) being sleeved on the first pin shaft (22) and having one end abutting against the first magnetic disk assembly (3), and the other end of the first memory spring (24) abutting against one side of the baffle (21); A second memory spring (25), the second memory spring (25) being sleeved on the second pin shaft (23) and having one end abutting against the second magnet disk assembly (4), and the other end of the second memory spring (25) abutting against the other side of the baffle (21).

3. The permanent magnet rotor with high temperature protection as claimed in claim 2, characterized in that: The profile shaft (1) comprises a flange (11) and a profile sleeve (12), and the memory spring assembly is arranged on the outer surface of the profile sleeve (12).

4. The permanent magnet rotor with high temperature protection as claimed in claim 3, characterized in that: The radial cross section of the profile sleeve (12) is one of a four-sided shape, a six-sided shape and an eight-sided shape.

5. The permanent magnet rotor with high temperature protection as claimed in claim 4, characterized in that: The number of the memory spring assemblies (2) is the same as the number of sides of the radial cross section of the profile sleeve (12), and one memory spring assembly (2) is arranged on one surface of the profile sleeve (12).

6. The permanent magnet rotor with high temperature protection as claimed in claim 5, characterized in that: Each surface of the profile sleeve (12) is provided with a baffle groove, and the baffle groove is formed by extending vertically from the outer surface of the profile sleeve (12) toward the central axis direction of the profile sleeve (12); The baffle plate (21) is partially disposed in the baffle plate groove.

7. The permanent magnet rotor with high temperature protection according to claim 6, characterized in that: The first magnet disk assembly (3) is provided with a first magnet disk hole (31) for accommodating a portion of the first pin shaft (22); The second magnet disk assembly (4) is provided with a second magnet disk hole (32) for accommodating a portion of the second pin shaft (23); One end of each of the first pin shafts (22) is disposed in the first magnet disk hole (31); One end of each of the second pin shafts (23) is disposed in the second magnet disk hole (32); Each of the memory spring components (2) is arranged between the first magnet disk hole (31) and the second magnet disk hole (32).

8. A permanent magnet torque limiter, characterized in that: The permanent magnet torque limiter comprises a permanent magnet rotor with high temperature protection as claimed in any one of claims 1 to 7.

Images