Anti-cracking injection molding magnetic ring assembly

Abstract

The utility model discloses an anti-cracking injection molding magnetic ring assembly which comprises an injection molding magnetic ring body and a metal installation ring, the metal installation ring comprises a connecting ring and an installation ring, the installation ring is arranged at one end of the connecting ring, the end face of the connecting ring is connected with the injection molding magnetic ring body, and the installation ring is connected with the injection molding magnetic ring body. The end face of the connecting ring is provided with a plurality of embedded blocks which are arranged in an annular array and embedded into the injection molding magnetic ring body. According to the utility model, the end face of the connecting ring is provided with the ten embedding blocks which are arranged in the annular array and are embedded into the injection molding magnet ring body, so that the injection molding magnet ring body is connected with the metal mounting ring, the connecting strength is ensured, and the injection molding magnet ring body and the metal mounting ring are prevented from rotating or falling off from each other.

Description

Technical Field

[0001] This utility model belongs to the field of injection molded magnetic ring technology, specifically relating to a crack-resistant injection molded magnetic ring assembly. Background Technology

[0002] Injection-molded permanent magnets are magnetic materials produced through an injection molding process. This process combines magnetic powder with plastic to form a magnetic component. Injection-molded permanent magnets offer many advantages, such as high dimensional accuracy, high design freedom, and high mechanical strength.

[0003] Existing injection-molded permanent magnets are often simple pure permanent magnet rings, widely used in electronic circuits such as signal sensors. As end products begin to develop towards multi-functionality and lightweight design, this requires the continuous integration of components in these products. Therefore, the demand for multi-functional magnetic ring assemblies with high mechanical strength and high magnetic field strength is constantly increasing.

[0004] However, simply fixing the external permanent magnet ring to the metal mounting ring through injection molding often fails to balance high mechanical strength and high magnetic field strength. Especially in complex applications, cracking can easily occur, leading to signal loss and product malfunction. Utility Model Content

[0005] The purpose of this invention is to provide a crack-resistant injection-molded magnetic ring assembly to solve the problems mentioned in the background art. The crack-resistant injection-molded magnetic ring assembly provided by this invention has the characteristics of balancing high mechanical strength and high magnetic field strength, preventing cracking in complex environments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a crack-resistant injection-molded magnetic ring assembly, comprising an injection-molded magnetic ring body and a metal mounting ring, wherein the metal mounting ring comprises a connecting ring and a mounting ring, wherein the mounting ring is disposed at one end of the connecting ring, the injection-molded magnetic ring body is connected to the end face of the connecting ring, and a plurality of embedded blocks arranged in a ring array and embedded in the interior of the injection-molded magnetic ring body are provided on the end face of the connecting ring.

[0007] To meet the high mechanical strength requirements, the metal mounting ring is further formed by stamping stainless steel.

[0008] To increase the contact area between the embedded block and the injection-molded magnetic ring and ensure connection strength, the embedded block is further designed with a trapezoidal structure.

[0009] To avoid stress concentration inside the injection-molded magnetic ring, the corners of the embedded blocks located inside the injection-molded magnetic ring are rounded.

[0010] In order to position the embedded block in the middle of the injection-molded magnetic ring and avoid the thin-walled structure of the injection-molded magnetic ring from causing easy cracking, a flange ring is further provided on the end face of the connecting ring, and the embedded block is set on the circumference of the flange ring.

[0011] To increase the volume of the injection-molded magnetic ring and improve its magnetic properties, a protrusion is further provided between two adjacent flange rings.

[0012] To prevent the injection-molded magnetic ring from directly contacting other connecting parts, thereby reducing stress transmission and lowering the risk of cracking, the inner diameter of the connecting ring is equal to the inner diameter of the injection-molded magnetic ring, while the inner diameter of the mounting ring is smaller than that of the connecting ring.

[0013] To eliminate the gate structure on the outer end face of the metal mounting ring and reduce the impact of the gate on the performance of the injection-molded magnetic ring assembly, the gate of the injection-molded magnetic ring body is further located on the side where the metal mounting ring is located.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model has ten embedded blocks arranged in a ring array on the end face of the connecting ring and embedded in the body of the injection-molded magnetic ring, so as to realize the connection between the injection-molded magnetic ring and the metal mounting ring, ensuring the strength of the connection and preventing the injection-molded magnetic ring and the metal mounting ring from rotating or falling off.

[0016] 2. The injection-molded magnetic ring and the metal mounting ring of this utility model adopt a multi-point connection structure, which can effectively prevent the injection-molded magnetic ring from cracking.

[0017] 3. The embedded block of this utility model has a trapezoidal structure, which increases the contact area between the embedded block and the injection-molded magnetic ring, ensuring the connection strength.

[0018] 4. The corners of the embedded blocks in this utility model are rounded to avoid stress concentration inside the injection-molded magnetic ring.

[0019] 5. The end face of the connecting ring of this utility model is provided with a flange ring, and the embedded block is set on the circumference of the flange ring, so that the embedded block is located in the middle of the injection-molded magnetic ring body, avoiding the situation that the injection-molded magnetic ring body is prone to cracking due to its thin-walled structure.

[0020] 6. The present invention has a protrusion between two adjacent flange rings, which can increase the volume of the injection-molded magnetic ring and improve the magnetic properties of the injection-molded magnetic ring.

[0021] 7. The inner diameter of the connecting ring of this utility model is equal to the inner diameter of the injection-molded magnetic ring body, and the inner diameter of the mounting ring is smaller than the inner diameter of the connecting ring, so that the injection-molded magnetic ring body does not directly contact other connecting parts, reducing stress transmission and thus reducing the risk of cracking. Attached Figure Description

[0022] Figure 1 and 2 All of these are schematic diagrams of the structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the metal mounting ring of this utility model.

[0024] In the diagram: 1. Injection-molded magnetic ring; 2. Metal mounting ring; 21. Connecting ring; 22. Embedded block; 23. Flanged ring; 24. Protrusion; 25. Mounting ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1-3 The present invention provides the following technical solution: a crack-resistant injection-molded magnetic ring assembly, comprising an injection-molded magnetic ring body 1 and a metal mounting ring 2. The injection-molded magnetic ring body 1 is a high-performance injection-molded neodymium iron boron magnet, and the metal mounting ring 2 is formed by stamping high-strength stainless steel. The metal mounting ring 2 includes a connecting ring 21 and a mounting ring 25. The mounting ring 25 is used for assembly with other connecting parts. The mounting ring 25 is disposed at one end of the connecting ring 21. The injection-molded magnetic ring body 1 is connected to the end face of the connecting ring 21. Ten embedding blocks 22 arranged in a ring array and embedded inside the injection-molded magnetic ring body 1 are provided on the end face of the connecting ring 21.

[0028] By adopting the above technical solution, this utility model has ten embedded blocks 22 arranged in a ring array on the end face of the connecting ring 21 and embedded inside the injection-molded magnetic ring body 1, realizing the connection between the injection-molded magnetic ring body 1 and the metal mounting ring 2, ensuring the strength of the connection, and preventing the injection-molded magnetic ring body 1 and the metal mounting ring 2 from rotating relative to each other or falling off. The injection-molded magnetic ring body 1 and the metal mounting ring 2 of this utility model adopt a multi-point connection structure, which can effectively prevent the injection-molded magnetic ring body 1 from cracking.

[0029] Specifically, the embedded block 22 has a trapezoidal structure.

[0030] By adopting the above technical solution, the contact area between the embedded block 22 and the injection-molded magnetic ring 1 is increased, ensuring the connection strength.

[0031] Specifically, the corners of the embedded block 22 located inside the injection-molded magnetic ring 1 are all rounded.

[0032] By adopting the above technical solution, stress concentration inside the injection-molded magnetic ring 1 can be avoided.

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that, specifically, a flange ring 23 is provided on the end face of the connecting ring 21, and the embedded block 22 is disposed on the circumference of the flange ring 23.

[0035] By adopting the above technical solution, the embedded block 22 is located in the middle of the injection-molded magnetic ring 1, thus avoiding the situation where the injection-molded magnetic ring 1 has a thin-walled structure that makes it prone to cracking.

[0036] Example 3

[0037] The difference between this embodiment and embodiment 2 is that, specifically, a protrusion 24 is provided between two adjacent flange rings 23, and the protrusion 24 is located on the side of the injection-molded magnetic ring body 1.

[0038] By adopting the above technical solution, the volume of the injection-molded magnetic ring 1 can be increased, and the magnetic properties of the injection-molded magnetic ring 1 can be improved.

[0039] Example 4

[0040] The difference between this embodiment and embodiment 1 is that, specifically, the inner diameter of the connecting ring 21 is equal to the inner diameter of the injection-molded magnetic ring 1, and the inner diameter of the mounting ring 25 is smaller than the inner diameter of the connecting ring 21.

[0041] By adopting the above technical solution, the injection-molded magnetic ring 1 is not in direct contact with other connecting parts, reducing stress transmission and thus reducing the risk of cracking.

[0042] Example 5

[0043] The difference between this embodiment and embodiment 1 is that, specifically, the injection gate of the injection-molded magnetic ring 1 is located on the side where the metal mounting ring 2 is located.

[0044] By adopting the above technical solution, there is no gate structure on the outer end face of the metal mounting ring 2, which reduces the impact of the gate on the performance of the injection-molded magnetic ring assembly.

[0045] In summary, this invention features ten embedded blocks 22 arranged in a ring array on the end face of the connecting ring 21, embedded inside the injection-molded magnetic ring 1. This connects the injection-molded magnetic ring 1 to the metal mounting ring 2, ensuring connection strength and preventing rotation or detachment between the two. The multi-point connection structure between the injection-molded magnetic ring 1 and the metal mounting ring 2 effectively prevents cracking of the injection-molded magnetic ring 1. The embedded blocks 22 have a trapezoidal structure, increasing the contact area between them and the injection-molded magnetic ring 1, thus ensuring connection strength. The corners of the embedded blocks 22 inside the injection-molded magnetic ring 1 are rounded to prevent stress concentration within the ring. A flanged ring 23 is provided on the end face of the connecting ring 21, and the embedded blocks 22 are positioned on the circumference of the flanged ring 23, placing them in the center of the injection-molded magnetic ring 1 and preventing cracking due to a thin-walled structure. This invention features a protrusion 24 between two adjacent flanged rings 23, which increases the volume of the injection-molded magnetic ring 1 and enhances its magnetic properties. The inner diameter of the connecting ring 21 is equal to the inner diameter of the injection-molded magnetic ring 1, while the inner diameter of the mounting ring 25 is smaller than that of the connecting ring 21. This prevents the injection-molded magnetic ring 1 from directly contacting other connecting parts, reducing stress transmission and thus lowering the risk of cracking.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crack resistant injection molded magnetic ring assembly, characterized by: The injection molded magnetic ring body and the metal mounting ring are included, the metal mounting ring includes a connecting ring and a mounting ring, wherein the mounting ring is arranged at one end of the connecting ring, the injection molded magnetic ring body is connected to the end surface of the connecting ring, and a plurality of embedded blocks in annular array are embedded into the injection molded magnetic ring body.

2. A crack resistant injection molded magnetic ring assembly as defined in claim 1, wherein: The metal mounting ring is punched and formed by stainless steel.

3. A crack resistant injection molded magnetic ring assembly as defined in claim 1, wherein: The embedded blocks are in trapezoidal structure.

4. A crack resistant injection molded magnetic ring assembly as defined in claim 3, wherein: The corners of the embedded blocks inside the injection molded magnetic ring body are all provided with round corners.

5. A crack resistant injection molded magnetic ring assembly as defined in claim 1, wherein: The end surface of the connecting ring is provided with a flange ring, and the embedded blocks are arranged on the circumference of the flange ring.

6. A crack resistant injection molded magnetic ring assembly as defined in claim 5, wherein: A protrusion is arranged between two adjacent flange rings.

7. A crack resistant injection molded magnetic ring assembly as defined in claim 1, wherein: The inner diameter of the connecting ring is equal to the inner diameter of the injection molded magnetic ring body, and the inner diameter of the mounting ring is smaller than the inner diameter of the connecting ring.

8. A crack resistant injection molded magnetic ring assembly as defined in claim 1, wherein: The injection gate of the injection molded magnetic ring body is arranged on the side where the metal mounting ring is arranged.

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