Yoke assembly and connection method thereof

Abstract

The present invention provides a yoke assembly and a connection method thereof, comprising a yoke and a yoke cover plate, wherein the yoke cover plate comprises a cover plate body and connecting parts arranged at two ends of the cover plate body, a groove is arranged on the yoke, the connecting part is arranged in the groove, and protrusions are respectively arranged on the edges of both sides of the groove of the yoke, the protrusions have three ends connected end to end to form the protrusions, the three edges are respectively edge A, edge B and edge C, the edge B is parallel to the horizontal reference plane of the yoke, the angle α between the edge A and the edge B is less than or equal to 90°, and the angle β between the edge B and the edge C is greater than 90° and less than 180°; through the above structure and method, the protrusion and the connecting part are processed by a vertical riveting process, which greatly improves the mechanical service life of the product, improves the electromagnetic effect of the coil, optimizes the product technical performance indicators, has high processing efficiency, high consistency of processing results, and wide applicability of the processing method.

Description

Technical Field

[0001] The invention relates to the technical field of processing yoke products, and in particular to a yoke assembly and a connection method thereof. Background Art

[0002] The connection of the existing release electromagnetic system is mostly to rivet a notch on the yoke by a riveting tool, and fix the yoke cover plate by lateral extrusion using the deformation generated by the notch, such as Figure 1 shown.

[0003] From the perspective of product technical indicators, during the use of the product, under the impact of the internal parts, the deformation at the notch will gradually recover, thus affecting the mechanical life of the electromagnetic system. Experiments have found that the yoke cover will fall off if the product is operated without load for less than 6,000 times, and the mechanical life of the electromagnetic system is low. In addition, split riveting will cause the electroplating layer of the yoke to be damaged, and even expose the base material, which reduces the corrosion resistance of the product.

[0004] In terms of product production efficiency and quality, since the existing connection between the yoke and the yoke cover plate adopts a rivet riveting process, the same product needs to be riveted four times. The rivet itself often needs to be replaced due to wear. It is difficult to achieve automatic riveting of the equipment while ensuring the riveting quality of the product. The production and processing efficiency is low, and the consistency of product quality is poor. Summary of the invention

[0005] The object of the present invention is to provide a yoke assembly and a connection method thereof to solve the above problems.

[0006] The technical solution adopted by the present invention is:

[0007] A yoke assembly comprises a yoke and a yoke cover plate, wherein the yoke cover plate comprises a cover plate body and connecting parts arranged at both ends of the cover plate body, a groove is arranged on the yoke, the connecting part is arranged in the groove, and raised parts are respectively arranged on the edges of both sides of the groove of the yoke, and the raised parts have three edges connected end to end to form the raised parts, the three edges are edge A, edge B and edge C, the edge B is parallel to the horizontal reference plane of the yoke, the angle α between the edge A and the edge B is less than or equal to 90°, and the angle β between the edge B and the edge C is greater than 90° and less than 180°.

[0008] A method for connecting a yoke assembly comprises the following steps:

[0009] S1. Processing the raised portion as described above in the yoke assembly on the yoke;

[0010] S2. The yoke cover is placed into the groove of the yoke;

[0011] S3. Use a convex rivet head to rivet the raised portion, and squeeze and bend the raised portion toward the groove direction of the yoke cover plate.

[0012] As a further improved technical solution of the present invention, in step S3, the convex rivet head is riveted by rotary riveting.

[0013] As a further improved technical solution of the present invention, in step S3, the convex rivet head performs riveting in a vertically downward direction.

[0014] As a further improved technical solution of the present invention, in step S3, the convex rivet head rivets the raised portion until the upper surface of the raised portion is flush with the upper surface of the yoke cover plate.

[0015] As a further improved technical solution of the present invention, in step S3, two raised portions adjacent to one of the connecting portions are riveted simultaneously by a convex rivet head.

[0016] As a further improved technical solution of the present invention, in step S1, both ends of the connecting portion close to the raised portion are chamfered.

[0017] As a further improved technical solution of the present invention, in step S3, the convex rivet head performs rotary riveting on the upper surface of the raised portion corresponding to the side B.

[0018] As a further improved technical solution of the present invention, in step S1, the processing is performed so that the angle between the side B and the side C is 135°.

[0019] As a further improved technical solution of the present invention, in step S3, a side of the protrusion close to the groove is higher than a side of the protrusion away from the groove by chamfering.

[0020] The beneficial effects of the present invention are:

[0021] Through the above structure and method, the protrusion and the connection part are processed by vertical riveting process, which greatly improves the mechanical service life of the product, improves the electromagnetic effect of the coil, optimizes the product technical performance indicators, has high processing efficiency, high consistency of processing results, and wide applicability of the processing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the connection processing of the existing yoke and the yoke cover;

[0023] Figure 2 It is a schematic diagram of the connection processing of the yoke and the yoke cover plate of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the connecting part and the raised part. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the structure of the connecting part and the raised part. Figure 2 ;

[0026] Figure 5 It is a schematic diagram of the connecting part and the raised part after riveting;

[0027] Figure 6 It is the DOE experiment mean response data table;

[0028] Figure 7 It is the DOE experiment signal-to-noise ratio response data table.

[0029] Among them: 1-magnetic yoke, 21-cover body, 22-connecting part, 3-groove, 4-raised part, 5-convex rivet head. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0031] If the invention involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.) when describing, it is necessary to define the directions involved, such as "In order to clearly express the positions and directions described in the invention, the end close to the operator is the proximal end, and the end away from the operator is the distal end." Or define it with the paper as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, it does not need to be defined here.

[0032] A yoke assembly, such as Figures 2-3 As shown, it includes a yoke 1 and a yoke cover plate, the yoke cover plate includes a cover plate body 21 and connecting parts 22 arranged at both ends of the cover plate body 21, a groove 3 is arranged on the yoke 1, the connecting part 22 is arranged in the groove 3, and protrusions 4 are respectively arranged on the edges of both sides of the groove 3 of the yoke 1, the protrusion 4 has three edges connected end to end to form the protrusion 4, the three edges are edge A, edge B and edge C, the edge B is parallel to the horizontal reference plane of the yoke 1, and is also parallel to the bottom surface of the groove 3, the angle α between the edge A and the edge B is less than or equal to 90°, and the angle β between the edge B and the edge C is greater than 90° and less than 180°.

[0033] A method for connecting a yoke assembly, based on the above-mentioned yoke assembly, comprises the following steps:

[0034] S1. Processing the protrusion 4 described above in the yoke assembly on the yoke 1;

[0035] S2. The yoke cover is placed into the groove 3 of the yoke 1;

[0036] S2. Use a convex rivet head 5 to rivet the protrusion 4 to squeeze and bend the protrusion 4 toward the groove 3 of the yoke cover plate.

[0037] Furthermore, in step S2, the convex rivet head 5 is riveted in a rotary riveting manner.

[0038] Furthermore, in step S2, the convex rivet head 5 performs riveting in a vertically downward direction.

[0039] Furthermore, in step S2, the convex rivet head 5 may be vertically riveted, such as Figure 5 As shown, when the electromagnetic system is connected, the protrusion 4 on the yoke 1 is deformed by the pressure of the convex rivet head 5 and bends in the direction of the connecting part 22, so that the deformed protrusion 4 can press the connecting part 22 in both the horizontal and vertical directions at the same time, and the connecting part 22 is also deformed by force, and finally the deformed protrusion 4 completely covers the connecting part 22, and the upper surface of the connecting part 22 is tightly pressed by the deformed protrusion 4, so that the yoke 1 and the yoke cover plate are connected together, which can greatly increase the mechanical service life of the product by more than 3 times; the convex rivet head 5 and the rotary riveting equipment adopt an automated rotary riveting process, so that the gap between the yoke 1 and the yoke cover plate is significantly reduced, which greatly improves the electromagnetic effect of the coil and optimizes the product technical performance indicators. In addition, the connection of the same type of products can also be processed by the connection method provided by the present invention, which has a wide range of applicability.

[0040] Based on the connection method of the yoke assembly mentioned above, DOE experimental design is carried out. DOE experimental design can obtain more information in fewer experiments, saving time and resources; analyze the interaction between multiple factors at the same time, provide a more comprehensive understanding; help identify the best operating conditions, improve product quality and process efficiency. Set three variables: the angle α between side A and side B, the angle β between side B and side C, and the riveting method. The result is set as the life of the electromagnetic system. The experimental plan and experimental data are as follows Tables 1 to 5. Figures 6-7 As shown, (riveting pressure 0.5MPa, after the action the gap is less than 0.3mm for qualified judgment):

[0041] Table 1-DOE experiment orthogonal table L9 (3*3)

[0042]

[0043] Table 2 - Factor Level Table

[0044] factor Level 1 Level 2 Level 3 A: Angle between side A and side B (α) ＜90° 90° ＞90° B: Angle between side C and side B (β) 90° 135° 150° C: Riveting method Vertical riveting Rotary riveting Vertical rotary riveting

[0045] Table 3 - Experimental schedule

[0046]

[0047] Table 4 - DOE Experiment Mean Response Data Table

[0048] level Angle between side A and side B (α) Angle between side C and side B (β) Riveting method 1 12800 7325 6383 2 10928 12500 4078 3 7233 11137 20500 Delta 5567 5175 16422 Ranking 2 3 1

[0049] Table 5-DOE experimental signal-to-noise ratio response data table

[0050] level Angle between side A and side B (α) Angle between side C and side B (β) Riveting method 1 80.61 74.84 76.07 2 76.64 80.19 70.48 3 75.24 77.47 85.94 Delta 5.73 5.34 15.46 Ranking 2 3 1

[0051] In the experiment, nine experimental groups were set up, and three samples were set up in each group for the experiment. The average value is the average value of the electromagnetic system life. Since the experimental results are relatively similar, one result is taken from the above list and confirmed according to the DOE experimental analysis:

[0052] In step S2, the convex rivet head 5 adopts vertical riveting to obtain an electromagnetic system with a longer mechanical life.

[0053] The electromagnetic system obtained by making the angle α between side A and side B less than or equal to 90° has a longer mechanical life. The angle α between A and B can be 90° according to structural requirements, or it can be an obtuse angle or an acute angle, which depends on the angle β and the riveting method; the angle β between C and B is preferably 90°≤β<180°, wherein β=135° is the preferred value obtained by experiment, and the corresponding electromagnetic system has a longer mechanical life. In practical applications, the angle α between side A and side B, the angle β between side B and side C and the riveting method interact with each other, and their specific values ​​are designed according to the yoke assembly, that is, other conditions and requirements. In addition, Figure 4 In the embodiment, a side D perpendicular to the side B may be provided between the side A and the side B, as long as the angle α between the side A and the side B meets the above requirements.

[0054] Furthermore, in step S3, two protrusions 4 adjacent to one of the connection parts 22 are simultaneously riveted by a convex rivet head 5, and a yoke assembly can achieve the connection between the yoke 1 and the yoke cover plate after two riveting operations, while the traditional processing technology requires four operations to achieve the fixation of four connection points. The efficiency of riveting and fixing is about twice that of the traditional processing technology. At the same time, the above-mentioned riveting process can be realized by automated equipment processing. Compared with manual processing, automated equipment processing can ensure the consistency of the quality of the processed products and improve the quality of the products.

[0055] Furthermore, in step S3, the convex rivet head 5 performs screw riveting on the upper surface of the raised portion 4 corresponding to the side B. During the screw riveting process, since the raised portion 4 is continuously deformed and bent, the convex rivet head 5 will also act on the inclined surface of the raised portion 4 corresponding to the side C.

[0056] Furthermore, in step S1, the side of the protrusion 4 close to the groove 3 is higher than the side of the protrusion 4 away from the groove 3 by chamfering, and both ends of the connecting portion 22 close to the protrusion 4 are chamfered, which improves the convenience of riveting processing and the aesthetics after processing.

[0057] Furthermore, the convex rivet head 5 rivets the raised portion 4 until the upper surface of the raised portion 4 is flush with the upper surface of the yoke cover plate, or according to design requirements, it can also float up and down by a certain distance to meet the requirements of product life.

[0058] The yoke assembly and the connection method of the yoke assembly provided by the present invention adopt a vertical riveting process to process the protrusion 4 and the connection part 22, which can greatly improve the mechanical service life of the product, significantly reduce the gap between the yoke 1 and the yoke cover plate, greatly improve the electromagnetic effect of the coil, and optimize the product technical performance indicators. In addition, in addition to the advantages of good performance of the processed product, the above-mentioned connection method also has the beneficial effects of high processing efficiency, high consistency of processing results, and wide applicability of the processing method.

[0059] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0060] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A yoke assembly, comprising a yoke (1) and a yoke cover plate, wherein the yoke cover plate comprises a cover plate body (21) and connecting portions (22) arranged at both ends of the cover plate body (21), a groove (3) is arranged on the yoke (1), and the connecting portion (22) is arranged in the groove (3), characterized in that: Protrusions (4) are respectively arranged on the edges of both sides of the groove (3) of the yoke (1), and the protrusions (4) have three edges connected end to end to form the protrusions (4), the three edges are edge A, edge B and edge C, the edge B is parallel to the horizontal reference plane of the yoke (1), the angle α between the edge A and the edge B is less than or equal to 90°, and the angle β between the edge B and the edge C is greater than 90° and less than 180°.

2. A method for connecting a yoke assembly, characterized in that: The steps include: S1. Processing on the yoke (1) The protrusion (4) in the yoke assembly according to claim 1; S2. The yoke cover is placed into the groove (3) of the yoke (1); S3. Use a convex rivet head (5) to rivet the raised portion (4), thereby pressing and bending the raised portion (4) toward the groove (3) of the yoke cover plate.

3. The method for connecting a yoke assembly according to claim 2, characterized in that: In step S3, the convex rivet head (5) is riveted in a rotary riveting manner.

4. The method for connecting a yoke assembly according to claim 3, characterized in that: In step S3, the convex rivet head (5) performs riveting in a vertically downward direction.

5. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S3, the convex rivet head (5) rivets the raised portion (4) until the upper surface of the raised portion (4) is flush with the upper surface of the yoke cover plate.

6. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S3, two protrusions (4) adjacent to one of the connecting parts (22) are simultaneously riveted by a convex rivet head (5).

7. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S1, both ends of the connecting portion (22) close to the raised portion (4) are chamfered.

8. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S3, the convex rivet head (5) performs rotary riveting on the upper surface of the raised portion (4) corresponding to the side B.

9. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S1 , the processing is performed so that the angle between the side B and the side C is 135°.

10. The method for connecting a yoke assembly according to claim 4, characterized in that: In step S3, a side of the protrusion (4) close to the groove (3) is higher than a side of the protrusion (4) away from the groove (3) by chamfering.

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