Injection-molded ferrite magnetic ring for sensing of brake system

Abstract

The utility model discloses an injection-molded ferrite magnetic ring for sensing of a brake system, which belongs to the technical field of injection-molded products, solves the problem of low demolding efficiency of the existing magnetic ring, and adopts the technical scheme that the injection-molded ferrite magnetic ring mainly comprises a magnetic ring body and a metal insert which are coaxially arranged, the magnetic ring body is arranged on the outer ring of the metal insert, and the metal insert is arranged on the outer ring of the magnetic ring body. The magnetic ring body comprises a magnetic ring glue opening surface and a magnetic ring glue opening back surface, a plurality of glue inlets with the same size are formed in the magnetic ring glue opening surface, the magnetic ring further comprises an annular ejector pin positioning part, and the ejector pin positioning part is arranged around the axis of the metal insert. The demoulding device is mainly used for effectively improving the demoulding efficiency of the magnetic ring.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding products, in particular to an injection molding ferrite magnetic ring for braking system sensing. Background Art

[0002] In the prior art, for example, utility model patent CN219247646U discloses a novel injection-molded ferrite magnetic ring for brake system sensing, including an annular magnetic ring body, the magnetic ring body including a magnetic ring glue port surface and a magnetic ring glue port back side, a plurality of evenly distributed glue inlets are arranged on the magnetic ring glue port surface, a metal insert is connected to the inner wall of the magnetic ring body, a plurality of evenly distributed ejector pins are arranged on the magnetic ring glue port back side, and a plurality of ejector pins need to be arranged when the product is demolded and ejected, and the positions of the plurality of ejector pins need to match the magnetic ring glue port back side, which makes the magnetic ring demolding process more complicated and affects the demolding efficiency. Utility Model Content

[0003] The utility model aims to provide an injection molded ferrite magnetic ring for brake system sensing, which solves the problem of low demoulding efficiency of existing magnetic rings and effectively improves the demoulding efficiency of the magnetic rings.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an injection-molded ferrite magnetic ring for braking system sensing, comprising a coaxially arranged magnetic ring body and a metal insert, wherein the magnetic ring body is arranged on the outer ring of the metal insert, the magnetic ring body comprises a magnetic ring glue port surface and a magnetic ring glue port reverse side, the magnetic ring glue port surface is provided with a plurality of equal-sized glue inlets, and also comprises an annular ejector pin positioning portion, wherein the ejector pin positioning portion is arranged around the axis of the metal insert.

[0005] After adopting the above technical scheme, the utility model has the following advantages: an annular ejector pin positioning portion is provided to reduce the number of ejector pin positioning portions, and accordingly, the number of ejectors is reduced, and the matching time between the ejectors and the ejector pin positioning portions is shortened, so as to improve the demoulding efficiency of the magnetic ring and also make the appearance of the magnetic ring more neat and beautiful.

[0006] Furthermore, the ejector pin positioning portion is arranged on the reverse side of the magnetic ring glue port.

[0007] By adopting the above technical solution, the ejector pin positioning portion is still arranged on the reverse side of the magnetic ring glue port, and there is no need to change other parts of the magnetic ring.

[0008] Furthermore, the ejector pin positioning portion is an annular hole arranged around the axis of the metal insert.

[0009] By adopting the above-mentioned technical solution, the ejector pin positioning part adopts an annular hole arranged around the axis of the magnetic ring body, so that when the ejector pin cooperates with the ejector pin positioning part, the force on various parts of the magnetic ring is more uniform, making it difficult for the magnetic ring to tilt and demoulding more smoothly.

[0010] Furthermore, the reverse side of the magnetic ring glue port is a conical surface, and the ejector pin positioning portion is arranged on the metal insert.

[0011] By adopting the above-mentioned technical scheme, on the basis that the reverse side of the magnetic ring glue port is a conical surface, the ejector pin positioning part is arranged on the metal insert, and the ejector pin is demoulded by abutting against the ejector pin positioning part on the metal insert, so that the magnetic ring body does not contact the ejector pin, and the integrity of the magnetic ring body can be protected. There is no need to open a hole on the conical surface to set the ejector pin positioning part.

[0012] Furthermore, the ejector pin positioning portion is an annular step arranged around the axis of the metal insert.

[0013] By adopting the above-mentioned technical solution, the annular step can limit the ejector pin, so that the magnetic ring can be ejected more stably.

[0014] Furthermore, the metal insert includes a first connecting portion connected to the magnetic ring body and a second connecting portion having a connecting hole, and the second connecting portion protrudes axially along the metal insert relative to the first connecting portion to form an annular step between the first connecting portion and the second connecting portion.

[0015] Furthermore, the magnetic ring body and the first connecting portion are integrally formed by in-mold injection molding.

[0016] By adopting the above-mentioned technical solution, the interfaces between components can be reduced through one-piece molding, the strength and stability of the magnetic ring body and the first connecting part structure can be improved, the risk of loosening and breakage can be reduced, and injection molding can reduce the number of processes and manual operations in the production process, thereby reducing production costs.

[0017] Furthermore, the first connecting portion and the second connecting portion are integrally formed by in-mold injection molding.

[0018] By adopting the above-mentioned technical solution, one-piece molding can reduce the interfaces between parts, improve the strength and stability of the metal insert structure, reduce the risk of loosening and breakage, and one-piece injection molding can reduce the number of processes and manual operations in the production process, thereby reducing production costs.

[0019] Furthermore, the magnetic ring body is formed by compression molding of permanent magnet ferrite powder.

[0020] By adopting the above-mentioned technical solution, thanks to the compression molding process, the structural strength of the magnetic ring body is higher.

[0021] Furthermore, the center position of the glue inlet is staggered with the zero line of the magnetic ring.

[0022] The above technical solution provides more choices for the opening positions of the glue inlet, which is more conducive to opening holes in the limited space on the glue inlet surface of the magnetic ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] Figure 1 This is a schematic structural diagram of an injection-molded ferrite magnetic ring for brake system sensing according to the first embodiment of the utility model;

[0025] Figure 2 It is a schematic structural diagram of another perspective of the injection-molded ferrite magnetic ring for brake system sensing according to the first embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of an injection molded ferrite magnetic ring for brake system sensing according to the second embodiment of the utility model;

[0027] Figure 4 It is a cross-sectional view of an injection-molded ferrite magnetic ring for brake system sensing according to the second embodiment of the utility model;

[0028] In the figure, 10, magnetic ring body; 11, magnetic ring glue port surface; 12, magnetic ring glue port back side; 13, glue inlet; 20, metal insert; 21, first connecting part; 22, second connecting part; 23, connecting hole; 30, zero line; 40, ejector pin positioning part. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0030] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0031] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0032] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0034] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0035] Embodiment 1:

[0036] like Figure 1 and Figure 2 As shown, the utility model provides an injection molded ferrite magnetic ring for brake system sensing, which is mainly suitable for sensing use in brake systems, such as motor speed control through the magnetic ring and the motor output shaft rotation connection output state, the controller receives the signal and then feedback output.

[0037] The magnetic ring includes a coaxially arranged magnetic ring body 10 and a metal insert 20. The magnetic ring body 10 is arranged on the outer ring of the metal insert 20. The magnetic ring body 10 includes a magnetic ring glue port surface 11 and a magnetic ring glue port reverse surface 12. The magnetic ring glue port surface 11 is provided with a plurality of equal-sized glue inlets 13, and also includes an annular ejector pin positioning portion 40. The ejector pin positioning portion 40 is arranged around the axis of the metal insert 20 to reduce the number of ejector pin positioning portions 40, and accordingly, reduce the number of ejectors, shorten the matching time between the ejector pin and the ejector pin positioning portion 40, so as to improve the demolding efficiency of the magnetic ring, and also make the appearance of the magnetic ring more neat and beautiful.

[0038] Preferably, four glue inlets 13 are provided. Of course, five, six, seven, eight or other suitable numbers of glue inlets 13 may also be provided.

[0039] Preferably, the reverse side 12 of the magnetic ring glue port is a conical surface, and the ejector positioning portion 40 is provided on the metal insert 20. The ejector is demoulded by abutting against the ejector positioning portion 40 on the metal insert 20, so that the magnetic ring body 10 does not contact the ejector, and the integrity of the magnetic ring body 10 can be protected. There is no need to open a hole on the conical surface to set the ejector positioning portion 40.

[0040] The ejector pin positioning portion 40 is an annular step arranged around the axis of the metal insert 20 . The annular step can limit the ejector pin and can eject the magnetic ring more stably.

[0041] Specifically, the metal insert 20 includes a first connecting portion 21 connected to the magnetic ring body 10 and a second connecting portion 22 having a connecting hole 23. The second connecting portion 22 protrudes axially along the metal insert 20 relative to the first connecting portion 21 to form an annular step between the first connecting portion 21 and the second connecting portion 22.

[0042] It should be noted that the connection hole 23 is mainly used for connecting the motor output shaft.

[0043] In order to improve the structural strength of the magnetic ring, the magnetic ring body 10 and the first connecting portion 21 are integrally formed by in-mold injection molding. The integral molding can reduce the interfaces between the parts, improve the strength and stability of the structure of the magnetic ring body 10 and the first connecting portion 21, reduce the risk of loosening and breaking, and the integral molding by injection molding can reduce the process and manual operation in the production process, thereby reducing the production cost.

[0044] In order to improve the structural strength of the metal insert 20, the first connection part 21 and the second connection part 22 are integrally formed by in-mold injection molding. The integral molding can reduce the interfaces between the parts, improve the strength and stability of the metal insert 20 structure, reduce the risk of loosening and breaking, and the integral molding by injection molding can reduce the process and manual operation in the production process, thereby reducing the production cost.

[0045] The metal insert 20 can be made of copper, iron or other materials.

[0046] Since the area of ​​the magnetic ring glue port surface 11 is relatively small, in order to reduce the difficulty of opening a hole, preferably, the center position of the glue inlet 13 is staggered with the zero line 30 of the magnetic ring, so that there are more choices for the opening position of the glue inlet 13, which is more conducive to opening a hole in the limited space of the magnetic ring glue port surface 11.

[0047] It should be noted that the zero position line 30 of the magnetic ring is the position on the magnetic ring where the magnetic field intensity is zero.

[0048] Embodiment 2:

[0049] like Figure 3 and Figure 4As shown, in this embodiment, a ring-shaped ejector pin positioning portion 40 is disposed on the reverse side 12 of the magnetic ring adhesive port, and the ejector pin positioning portion 40 is disposed around the axis of the metal insert 20 .

[0050] Preferably, the ejector pin positioning portion 40 is an annular hole arranged around the axis of the metal insert 20. When the product is demoulded, the magnetic ring is ejected by the ejector pin against the annular hole. By only providing one annular hole, the number of annular holes is reduced, and accordingly, the number of ejector pins is reduced. Only one ejector pin is required to cooperate with one annular hole, which shortens the matching time between the ejector pin and the annular hole, thereby improving the demoulding efficiency of the magnetic ring. In addition, when the ejector pin cooperates with the annular hole, the force on each part of the magnetic ring is more uniform, so that the magnetic ring is not easy to tilt and demoulding is smoother.

[0051] It should be noted that the ejector pin can be an annular ejector pin that matches the annular hole. The annular ejector pin and the annular hole only need to be matched once, which shortens the matching time.

[0052] Among them, the magnetic ring body 10 can be compression molded from permanent magnet ferrite powder. Thanks to the compression molding process, the magnetic ring body 10 has a higher structural strength, so there is no need to set reinforcing ribs on the surface of the magnetic ring body 10, which further makes the surface of the magnetic ring body 10 more beautiful.

[0053] It should be noted that because the magnetic ring is compression molded instead of injection molded, the magnetic ring will not have problems of air entrapment and poor exhaust during the injection molding process during production. Therefore, the magnetic ring glue surface 11 may not be provided with exhaust holes to make the surface of the magnetic ring neater. Accordingly, the number of openings can also be reduced, which is beneficial to ensure the structural strength of the magnetic ring.

[0054] For other contents not described in this embodiment, please refer to Embodiment 1.

[0055] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. An injection molded ferrite magnetic ring for brake system sensing, comprising a coaxially arranged magnetic ring body and a metal insert, wherein the magnetic ring body is arranged on the outer ring of the metal insert, and the magnetic ring body comprises a magnetic ring glue mouth surface and a magnetic ring glue mouth reverse surface, characterized in that: The magnetic ring glue port surface is provided with a plurality of glue inlets of equal size, and also includes an annular ejector pin positioning portion, and the ejector pin positioning portion is arranged around the axis of the metal insert.

2. The injection molded ferrite magnetic ring for brake system sensing according to claim 1, characterized in that: The ejector pin positioning portion is arranged on the reverse side of the magnetic ring glue port.

3. The injection molded ferrite magnetic ring for brake system sensing according to claim 2, characterized in that: The ejector pin positioning portion is an annular hole arranged around the axis of the metal insert.

4. The injection molded ferrite magnetic ring for brake system sensing according to claim 1, characterized in that: The reverse side of the magnetic ring glue port is a conical surface, and the ejector pin positioning portion is arranged on the metal insert.

5. The injection molded ferrite magnetic ring for brake system sensing according to claim 4, characterized in that: The ejector pin positioning portion is an annular step arranged around the axis of the metal insert.

6. The injection molded ferrite magnetic ring for brake system sensing according to claim 4, characterized in that: The metal insert comprises a first connection part connected to the magnetic ring body and a second connection part having a connection hole, wherein the second connection part protrudes axially along the metal insert relative to the first connection part so as to form an annular step between the first connection part and the second connection part.

7. The injection molded ferrite magnetic ring for brake system sensing according to claim 6, characterized in that: The magnetic ring body and the first connecting part are integrally formed by in-mold injection molding.

8. The injection molded ferrite magnetic ring for brake system sensing according to claim 6, characterized in that: The first connection part and the second connection part are integrally formed by in-mold injection molding.

9. The injection molded ferrite magnetic ring for brake system sensing according to claim 1, characterized in that: The magnetic ring body is formed by compression molding of permanent magnetic ferrite powder.

10. The injection molded ferrite magnetic ring for brake system sensing according to claim 1, characterized in that: The center position of the glue inlet is staggered with the zero line of the magnetic ring.

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