Grinding end structure and device for magnetic core

Abstract

The utility model provides an end grinding structure and device for a magnetic core, and relates to the field of magnetic core grinding structures. One side of the grinding part is connected to the supporting part, and the other side of the grinding part is used for making contact with a magnetic core; the grinding part is provided with a first pressure relief part which is used for forming a pressure relief area communicated with the outside after being in contact with the magnetic core; the grinding part is provided with a second pressure relief part used for conducting pressure relief on the upper area of the grinding part when the grinding part is separated from the magnetic core so as to overcome adhesive force generated when the grinding part makes contact with the magnetic core, and the problem that the bonding effect is affected due to the fact that a small-size magnetic core is prone to being attracted and taken up by a grinding head is solved.

Description

Technical Field

[0001] The utility model relates to the field of magnetic core grinding structures, in particular to a grinding end structure and device for a magnetic core. Background Art

[0002] Magnetic cores are very common components, and components like transformers and inductors utilize their properties. During the manufacturing process, they require grinding, but most existing core grinding is done using tooling, and most applications involve large cores, which are heavy enough to escape the influence of the grinding head's suction force.

[0003] However, in some component preparation scenarios, smaller magnetic cores need to be applied, and an online grinding process is adopted. The magnetic core grinding head is used to grind the glue between the two U-shaped magnetic cores. Due to the viscosity between the magnetic core and the grinding head and the air pressure adsorption, the magnetic core is easily lifted up by the grinding head, thereby destroying the originally fully fitted magnetic core bonding surface, thereby affecting the magnetic core bonding effect. Utility Model Content

[0004] In order to overcome the above technical defects, the purpose of the present invention is to provide a grinding end structure and device for magnetic cores, so as to solve the problem that small-sized magnetic cores are easily sucked up by the grinding head when grinding, affecting the bonding effect.

[0005] The utility model discloses a grinding end structure for a magnetic core, comprising:

[0006] Support part;

[0007] a grinding portion, one side of which is connected to the supporting portion and the other side of which is used to contact the magnetic core;

[0008] The grinding portion is provided with a first pressure relief portion, which is used to form a pressure relief area communicating with the outside after contacting the magnetic core;

[0009] The grinding portion is provided with a second pressure-releasing portion, which is used to release pressure in a part of the upper area of ​​the grinding portion when separating from the magnetic core to overcome the adhesive force generated by contact with the magnetic core.

[0010] Preferably, the first pressure relief portion includes at least one;

[0011] One end of the first pressure-releasing portion extends beyond the side of the grinding portion that contacts the magnetic core, and the other end extends beyond the circumferential side wall of the grinding portion.

[0012] Preferably, the first pressure-releasing portion includes a groove located on a side of the grinding portion in contact with the magnetic core;

[0013] At least one side of the groove extends beyond the side surface of the grinding portion.

[0014] Preferably, the first pressure-releasing portion is formed by setting the side of the grinding portion in contact with the magnetic core to be non-planar.

[0015] Preferably, the second pressure-releasing portion comprises a retractable member located on the side of the grinding portion in contact with the magnetic core;

[0016] The grinding portion is provided with a receiving groove for arranging the retractable member, and the notch of the receiving groove extends out of the side of the grinding portion in contact with the magnetic core;

[0017] The retractable member includes a compression spring and a limiting portion;

[0018] One end of the compression spring is connected to the notch of the accommodating groove, and the other end is connected to the limiting portion;

[0019] The limiting portion is configured to close the notch of the accommodating groove when the compression spring is in a natural state and partially extend out of the grinding portion, and squeeze the compression spring into the accommodating groove after the grinding portion contacts the magnetic core.

[0020] Preferably, the second pressure relief portion comprises an air supply pipe passing through the grinding portion;

[0021] The inlet of the air supply pipe is connected to an air supply device, and the outlet extends to the side where the grinding part contacts the magnetic core.

[0022] Preferably, the supporting portion and the grinding portion are detachably connected.

[0023] The utility model also discloses a grinding device for a magnetic core, comprising a connecting device and any one of the above-mentioned grinding end structures; the grinding end structure is connected to one end of the connecting device.

[0024] Preferably, the grinding end structure and the connecting device are detachably connected.

[0025] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0026] The present application provides a grinding end structure and device for a magnetic core, which is used in the grinding scenario of small-sized magnetic cores. A first pressure relief portion and a second pressure relief portion are provided on the grinding portion. The first pressure relief portion (such as a through hole, a groove, a non-plane, etc.) is used to form a gap on the side where the grinding portion contacts the magnetic core, thereby forming a pressure relief area connected to the outside, increasing the air pressure stability between the grinding portion and the magnetic core, and the second pressure relief portion (such as an elastic part, an air supply pipe, etc.) is used to provide a certain pressure on a partial area on the grinding portion to disperse the tightness of the fit between the grinding portion and the magnetic core, thereby overcoming the adhesion force generated by the contact with the magnetic core, so as to solve the problem that the small-sized magnetic core is easily adsorbed and lifted by the grinding head during grinding, affecting the bonding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The grinding end structure and device for a magnetic core of the utility model in embodiments 1 and 2 realizes the bonding area of ​​the magnetic core by the grinding portion;

[0028] Figure 2 This is a schematic structural diagram of the grinding portion in Embodiment 1 of a grinding end structure and device for a magnetic core according to the present invention;

[0029] Figure 3 This is a structural schematic diagram of a first pressure relief portion in Embodiment 1 of a grinding end structure and device for a magnetic core according to the present invention;

[0030] Figure 4 This is a schematic structural diagram of a second pressure relief portion in the first embodiment of a grinding end structure and device for a magnetic core according to the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a second pressure relief portion in a pressure relief state in the first embodiment of a grinding end structure and device for a magnetic core according to the present invention;

[0032] Figure 6 This is a structural schematic diagram of a second embodiment of a grinding end structure and device for a magnetic core according to the present utility model.

[0033] Reference numerals:

[0034] 1-support part; 2-grinding part; 3-first pressure relief part; 4-second pressure relief part; 41-limiting part; 42-compression spring; 43-accommodating groove; 5-connecting device. DETAILED DESCRIPTION

[0035] The advantages of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

[0036] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0037] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "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 present invention 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 present invention.

[0040] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be the internal connection between two components, which can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0041] Example 1: This embodiment discloses a grinding end structure for a magnetic core, which is used in the online grinding process of small-sized magnetic cores (a single magnetic core does not exceed a preset size) to solve the problem of adsorption between the magnetic core and the grinding head (end). For details, see Figure 1-Figure 5 ,include:

[0042] Support portion 1; as an example, it can be configured in a rectangular parallelepiped, cylindrical, etc., and is used to provide support or bear pressure for the grinding portion 2 described below, or to achieve connection with other components or structures. Its size can be slightly larger than the grinding portion 2 described below to improve stability during use. In some scenarios, other structures can also be used instead of or alone for the grinding portion 2 described below (in connection with other structures);

[0043] The grinding part 2 has one side connected to the support part 1 and the other side used to contact the magnetic core. The side contacting the magnetic core is used for grinding the magnetic core. It can also be set to a rectangular parallelepiped, cylindrical, etc. The specific shape can be set according to the actual application of the magnetic core bonding surface;

[0044] The grinding portion 2 is provided with a first pressure relief portion 3 for forming a pressure relief area communicating with the outside after contacting the magnetic core;

[0045] The grinding part 2 is provided with a second pressure-releasing part 4, which is used to release pressure on a part of the grinding part 2 when separating from the magnetic core to overcome the adhesive force generated by contact with the magnetic core.

[0046] In this embodiment, the first pressure relief portion 3 and the second pressure relief portion 4 are respectively used to achieve different functions. Specifically, the first pressure relief portion 3 is used to form a gap on the side where the grinding portion 2 contacts the magnetic core. The magnetic core bonding surface can be regarded as a plane. When the grinding portion 2 contacts the magnetic core, the presence of the first pressure relief portion 3 creates a pressure relief area between the grinding portion 2 and the magnetic core that is connected to the outside, thereby increasing the air pressure stability between the grinding portion 2 and the magnetic core and reducing the negative pressure that causes the magnetic core and the grinding portion 2 to fit tightly and adhere. The second pressure relief portion 4 is used to provide a certain pressure on a portion of the grinding portion 2, so that when the grinding portion 2 moves relative to the magnetic core, different pressures are generated at different positions on the grinding portion 2, thereby dispersing the tightness of the fit between the grinding portion 2 and the magnetic core, thereby overcoming the adhesive force generated by contact with the magnetic core and facilitating the separation of the grinding portion 2 from the magnetic core. When different pressures are generated at different positions on the grinding portion 2, the contact state with the bonding surface of the magnetic core is different, thereby converting surface contact into point contact or other contact methods that are more convenient for separation.

[0047] Based on the above, based on the setting of the first pressure relief part 3 and the second pressure relief part 4, when the grinding part 2 contacts the magnetic core, it works normally, and the grinding action flattens the glue between the two U-shaped magnetic cores to reduce the gap between the magnetic cores and increase the inductance of the magnetic cores. When the grinding end is lifted after grinding or lifted and moved during grinding, the first pressure relief part 3 can achieve air pressure balance between the grinding part 2 and the contact surface of the magnetic core, and the second pressure relief part 4 disperses the contact between the grinding part 2 and the magnetic core at different positions after pressure relief, thereby reducing the viscosity between the contact surfaces of the magnetic core. Therefore, the grinding end structure can effectively reduce the adsorption generated between the contact between the grinding part 2 and the magnetic core, improve the grinding effect, facilitate operation, and improve work efficiency.

[0048] In a preferred embodiment, the first pressure relief portion 3 specifically includes at least one portion; one end of the first pressure relief portion 3 extends beyond the side of the grinding portion 2 in contact with the magnetic core, and the other end extends beyond the circumferential sidewall of the grinding portion 2. Because the grinding portion 2 is connected to the support portion 1 on one side and contacts the magnetic core on the other side, the first pressure relief portion 3 is configured to extend externally through its circumferential sidewall. This (hole-shaped) pressure relief area enables air pressure exchange with the outside world, thereby improving air pressure balance.

[0049] As an example Figure 1 , 8 ventilation holes are arranged along the circumferential direction of the side where the grinding part 2 contacts the magnetic core, and extend from the left and right side walls of the grinding part 2 (see Figure 2, is the back of the grinding part 2 with ventilation holes, and its circumferential holes are used for detachable connection with the support part 1. The holes close to the center are ventilation holes, and the most central hole is the second pressure relief part 4 described below), which is connected to the outside. The specific position, size and number of ventilation holes can be adjusted according to the application scenario.

[0050] In another preferred embodiment, the first pressure relief portion 3 includes at least one groove located on the side of the grinding portion 2 in contact with the magnetic core; at least one side of the groove extends out of the side of the grinding portion 2, which is different from the above-mentioned embodiment in that a through hole is not provided through the grinding portion 2, but a groove is provided on the side in contact with the magnetic core, and the groove extends out of the side of the grinding portion 2 (i.e., the groove replaces the Figure 2 A through hole is formed in the middle, not shown in the drawings), thereby forming a through-groove-shaped pressure relief area after contact with the magnetic core to achieve air pressure exchange with the outside, so that the air pressure on the contact surface between the grinding part 2 and the magnetic core is stable.

[0051] In another preferred embodiment, the first pressure relief portion 3 is formed by setting the side of the grinding portion 2 in contact with the magnetic core to be non-planar, that is, setting the side of the grinding portion 2 in contact with the magnetic core to be a non-planar with concave and convex surfaces (such as wavy, and / or adding a coating to replace Figure 2 The through hole is not shown in the accompanying drawings). As mentioned above, the bonding surface of the magnetic core is a plane, and after it contacts the non-planar surface of the grinding part 2, a number of gaps (i.e., pressure relief areas) are formed between them, thereby realizing air pressure exchange with the outside, so that the air pressure on the contact surface between the grinding part 2 and the magnetic core is stable.

[0052] In a preferred embodiment, Figure 4 The second pressure-releasing portion 4 includes a retractable part located on the side of the grinding portion 2 in contact with the magnetic core; the grinding portion 2 is provided with a receiving groove 43 for arranging the retractable part, and the notch of the receiving groove 43 extends out of the side of the grinding portion 2 in contact with the magnetic core; the retractable part includes a compression spring 42 and a limiting portion 41; one end of the compression spring 42 is connected to the notch of the receiving groove 43, and the other end is connected to the limiting portion 41; the limiting portion 41 is configured to: when the compression spring 42 is in a natural state, the notch of the receiving groove 43 is closed and partially extends out of the grinding portion 2, and after the grinding portion 2 contacts the magnetic core, the compression spring 42 is squeezed into the receiving groove 43.

[0053] Specifically, the limiting portion 41 can also be in the shape of a rod (push rod), a ball, etc. The grinding portion 2 generally acts on the top of the magnetic core. Due to the presence of the compression spring 42, it can move up and down. The downward moving portion extends out of the notch of the accommodating groove 43. When the grinding portion 2 contacts the magnetic core, the magnetic core squeezes the limiting portion 41 and moves upward into the accommodating groove 43. When the grinding portion 2 is lifted and moved (such as Figure 5), the grinding part 2 pops out / extends out under the action of the restoring elastic force of the compression spring 42, and the surface contact with the magnetic core changes to point contact, thereby reducing the viscosity between the contact surfaces of the magnetic core and reducing the situation where the grinding part 2 is lifted and moves to drive the magnetic core to move.

[0054] It is also for illustration that the above-mentioned accommodating groove 43 can extend to the supporting portion 1, or even into the connecting device 5 in the following fifth embodiment, which is only set according to the size of the retractable member.

[0055] It is understandable that the above-mentioned limiting portion 41 and compression spring 42 can be replaced by other existing disclosed components that can be implemented to enter and exit the notch of the accommodating groove 43 (such as multiple spring columns).

[0056] In another preferred embodiment, the second pressure relief portion 4 includes an air supply pipe running through the grinding portion 2 (ie, an air supply pipe is used instead of a Figure 5 The compression spring 42 and the limiting portion 41 in the grinding section 2 can be arranged at the center of the grinding section 2 (preferably) or at other locations, which are not shown in the accompanying drawings); the inlet of the air supply pipe is connected to an air supply device, and the outlet extends to the side of the grinding section 2 that is in contact with the magnetic core. Different from the structure in the above-mentioned embodiment 1 in which a retractable part is used to achieve local pressure supply, the present embodiment uses air pressure to achieve different pressure distributions when the grinding section 2 is lifted and moved. The pressure at the outlet of the air supply pipe is slightly higher than the pressure at other locations on the magnetic core, so that the magnetic core overcomes the adsorption effect between the grinding section 2 and the grinding section 2.

[0057] It is understandable that the air pressure control provided by the air supply device allows the grinding part 2 to be separated from the magnetic core (to offset the viscosity) without excessive power. At this time, the magnetic core will be confined in the PCBA slot and will not move due to the action of air pressure.

[0058] It should be noted that the settings of the above-mentioned first pressure relief parts 3 and second pressure relief parts 4 can be freely combined, and one or more can be set according to the actual scenario, or the position can be adjusted, without being limited by the above-mentioned implementation examples, and other existing structures that can achieve the above-mentioned functions can also be used here.

[0059] In this embodiment, the support part 1 and the grinding part 2 are detachably connected. Specifically, this can be achieved by snap-fitting, bolting or other existing detachable structures, so that the support part 1 and the grinding part 2 are fixedly connected in the working state and can be replaced in the non-working state, thereby facilitating application and replacement of damaged parts.

[0060] Example 2: The present invention also discloses a grinding device for magnetic cores, see Figure 6, comprising a connecting device 5 and the anti-adsorption grinding end structure implemented in any one of the above-mentioned embodiments 1 to 4; the anti-adsorption grinding end structure is connected to one end of the connecting device 5. The connecting device 5 can function as a long column to facilitate operator gripping and operation, or it can be used to facilitate coordination with other equipment to achieve automatic grinding operation. The specific shape and length can be selected according to the actual scenario.

[0061] In a preferred embodiment, the grinding end structure and the connecting device 5 are detachably connected, thereby facilitating operation and replacement. Similar to the embodiment 1, the detachability can be achieved by means of snap-fit, bolts, positioning pins, etc.

[0062] It should be noted that the embodiments of the present invention have better feasibility and do not limit the present invention in any form. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A grinding end structure for a magnetic core, characterized in that: include: Support part; a grinding portion, one side of which is connected to the supporting portion and the other side of which is used to contact the magnetic core; The grinding portion is provided with a first pressure relief portion, which is used to form a pressure relief area communicating with the outside after contacting the magnetic core; The grinding portion is provided with a second pressure-releasing portion, which is used to release pressure in a part of the upper area of ​​the grinding portion when separating from the magnetic core to overcome the adhesive force generated by contact with the magnetic core.

2. The grinding end structure according to claim 1, characterized in that: The first pressure relief portion includes at least one; One end of the first pressure-releasing portion extends beyond the side of the grinding portion that contacts the magnetic core, and the other end extends beyond the circumferential side wall of the grinding portion.

3. The grinding end structure according to claim 1, characterized in that: The first pressure-releasing portion includes a groove located on a side of the grinding portion in contact with the magnetic core; At least one side of the groove extends beyond the side surface of the grinding portion.

4. The grinding end structure according to claim 1, characterized in that: The first pressure-releasing portion is formed by setting the side of the grinding portion that contacts the magnetic core to be non-planar.

5. The grinding end structure according to claim 1, characterized in that: The second pressure-releasing portion includes a retractable member located on a side of the grinding portion in contact with the magnetic core; The grinding portion is provided with a receiving groove for arranging the retractable member, and the notch of the receiving groove extends out of the side of the grinding portion in contact with the magnetic core; The retractable member includes a compression spring and a limiting portion; One end of the compression spring is connected to the notch of the accommodating groove, and the other end is connected to the limiting portion; The limiting portion is configured to close the notch of the accommodating groove when the compression spring is in a natural state and partially extend out of the grinding portion, and squeeze the compression spring into the accommodating groove after the grinding portion contacts the magnetic core.

6. The grinding end structure according to claim 1, characterized in that: The second pressure relief portion includes an air supply pipe that passes through the grinding portion; The inlet of the air supply pipe is connected to an air supply device, and the outlet extends to the side where the grinding part contacts the magnetic core.

7. The grinding end structure according to claim 1, characterized in that: The supporting portion and the grinding portion are detachably connected.

8. A grinding device for a magnetic core, characterized in that: comprising a connecting device and a grinding end structure as claimed in any one of claims 1 to 7; The grinding end structure is connected to one end of the connecting device.

9. The grinding device according to claim 8, characterized in that: The grinding end structure and the connecting device are detachably connected.

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