Terminal shell assembly and coil assembly using same

Abstract

The utility model discloses a terminal shell assembly and a coil assembly using the same, and the terminal shell assembly comprises a terminal shell which comprises a main body part which is used for the plugging of an external plugging sheet of the coil assembly, a plastic packaging platform which is formed at one side, facing a coil skeleton of the coil assembly, of the main body part, and a bayonet which is arranged in the plastic packaging platform; the blocking piece is suitable for being pressed and fixed in the bayonet so as to block the bayonet; and the plugging piece is in interference fit with the bayonet. According to the utility model, the problems of deformation of the main body part and overflow of the molding compound in the injection molding process can be solved by a simplified structure at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a terminal shell component and a coil component using the same. Background Art

[0002] The coil assembly in the RAST2.5 structure used in the prior art includes a plastic-encapsulated housing, a coil skeleton, an enameled wire, a terminal housing, a thermal protector, and an external plug-in. The specific connection method and production process of the coil assembly are as follows:

[0003] The external plug-in is pressed into the frame by a pneumatic crimping tool. After fully automatic winding, twisting, paralleling, cutting and installation of thermal protectors, the external plug-in is welded to one end of the enameled wire, the other end of the enameled wire is spot welded to one end of the thermal protector, and the other end of the thermal protector is spot welded to another external plug-in to form a series circuit. After the connection is completed, the coil is plastic-sealed.

[0004] In the above-mentioned production process, a part of the rear part of the terminal shell is plastic-sealed in the plastic shell together with the coil skeleton, inserts, etc. Under the action of high temperature and high pressure of the mold, the outer side of the terminal shell will be deformed and cannot be used normally. In this regard, an insert can be arranged in the terminal shell to achieve the purpose of preventing the terminal shell from deforming, but the design and production costs of this structure are relatively high. For this reason, the prior art CN218570000U prevents the terminal shell from deforming by adjusting the outer structure of the terminal shell and changing the force position of the terminal shell during plastic sealing. However, actual use research has found that although the disclosed technology reduces labor costs, it also creates another problem. When the terminal shell 1 is formed, after the terminal shell 1 is demolded from the snap-on mold, a hollow structure 2 (such as Figure 1 As shown in the figure), when the coil assembly is plastic-sealed, there will be overflow at the hollow structure of the terminal shell, making the coil unusable.

[0005] Therefore, it is necessary to further optimize the structure of the terminal shell assembly to prevent deformation of the terminal shell and to avoid overflow of the plastic packaging material during injection molding of the coil assembly. Utility Model Content

[0006] The first object of the utility model is to provide a terminal housing assembly to solve the technical problems of taking into account both the simplification of the structure and preventing overflow of the plastic sealing material during the injection molding process.

[0007] The second object of the utility model is to provide a coil assembly to solve the technical problem of simplification of structure and prevention of overflow of plastic sealing material during injection molding.

[0008] The terminal housing assembly of the utility model is realized as follows:

[0009] A terminal housing assembly, comprising:

[0010] The terminal housing includes a main body for plugging in an external plug-in sheet of the coil assembly, a plastic sealing platform formed on a side of the main body facing the coil skeleton of the coil assembly, and a bayonet provided in the plastic sealing platform;

[0011] The blocking piece is suitable for being pressed and fixed in the bayonet to form a blockage for the bayonet; the blocking piece is interference fit with the bayonet.

[0012] In an optional implementation of the present invention, the blocking piece is T-shaped, and the corresponding bayonet has a T-shaped cavity adapted to the blocking piece.

[0013] In an optional implementation of the utility model, the blocking member includes a base body and an extension body protruding from one side end of the base body; and

[0014] The T-shaped cavity comprises a first accommodating cavity adapted to the base body and a second accommodating cavity suitable for inserting the extension body; wherein

[0015] The dimension of the second accommodating cavity perpendicular to the depth direction of the terminal housing is smaller than the dimension of the second accommodating cavity perpendicular to the depth direction of the terminal housing;

[0016] The second accommodating cavity is located on a side of the first accommodating cavity facing away from the coil frame.

[0017] In an optional implementation of the present invention, a gradually decreasing trumpet-shaped guide portion is formed in the first accommodating cavity from its cavity opening facing away from the second accommodating cavity into the cavity.

[0018] In an optional implementation of the present invention, the base body and the extension body are both rectangular parallelepiped structures; the first accommodating cavity and the second accommodating cavity are both rectangular parallelepiped structures; and

[0019] The dimensions of the trumpet-shaped guide portion along the four edges of the first accommodating cavity are the same.

[0020] In an optional implementation of the present invention, the proportion of the depth of the trumpet-shaped guide portion to the first accommodating cavity is no more than 1 / 2.

[0021] In an optional implementation of the utility model, four first positioning surfaces are formed in the first accommodating cavity and respectively seal with four side wall surfaces extending along the depth direction of the T-shaped cavity on the base; and

[0022] A second positioning surface is also formed in the first accommodating cavity and is sealed with a side wall surface of the base body facing the extension body and surrounding the extension body.

[0023] In an optional implementation of the present invention, the ratio of each of the first positioning surfaces to the depth of the first accommodating cavity is not less than 1 / 2.

[0024] In an optional implementation of the utility model, a guide head is formed on the side end of the extension body facing away from the base body;

[0025] The dimension of the end surface of the guide head adjacent to the substrate is greater than the dimension of the end surface of the guide head away from the substrate.

[0026] The coil assembly of the utility model is realized as follows:

[0027] A coil assembly comprises: the terminal housing assembly described above.

[0028] By adopting the above technical scheme, the utility model has the following beneficial effects: the terminal shell assembly and the coil assembly using the same of the utility model, through the molding of the molding platform on the side of the coil skeleton of the main body facing the coil assembly, the molding platform is directly used for integral injection molding with the coil skeleton of the coil assembly, and cooperates with the load-bearing part to bear the molding pressure from the injection mold, thereby making the main body of the overall terminal shell located on the side of the molding platform away from the coil skeleton not directly involved in the molding, so that the molding pressure acts on the molding platform, changing the position of the molding force, so that the main body deformation problem due to the molding pressure will not occur. On this basis, by fixing the plugging piece in the bayonet formed by the injection molding of the molding platform, the problem of plastic sealing material overflow during the injection molding of the terminal shell assembly and the coil assembly can be avoided. The plugging piece here only needs to cooperate with the molding platform and does not need to be inserted into the main body. Therefore, compared with the prior art that uses an insert that is integrally inserted into the main body, the structural design is simple, the cost is low and it is easy to process. Therefore, the terminal housing assembly of the present invention can simultaneously prevent the problem of deformation of the main body with a simplified structure and the problem of overflow of the plastic sealing material during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a terminal housing assembly of the prior art;

[0030] Figure 2 is a schematic diagram of a terminal housing assembly and a coil frame in a matching state according to an embodiment of the present application;

[0031] Figure 3 is an exploded view of a terminal housing assembly according to an embodiment of the present application;

[0032] Figure 4 is a cross-sectional schematic diagram of a terminal housing assembly in an embodiment of the present application;

[0033] Figure 5 yes Figure 4 A magnified schematic diagram of part A;

[0034] Figure 6 It is a schematic structural diagram of a blocking member of a terminal housing assembly from a first perspective in an embodiment of the present application;

[0035] Figure 7 is a schematic structural diagram of a blocking member of a terminal housing assembly from a second viewing angle in an embodiment of the present application;

[0036] Figure 8 3 is a schematic structural diagram of a blocking member of a terminal housing assembly in an embodiment of the present application from a third viewing angle;

[0037] Fig. 9 is a schematic structural diagram of a blocking member of a terminal housing assembly in an embodiment of the present application from a fourth viewing angle;

[0038] Fig.10 It is a schematic structural diagram of the first perspective of the bayonet of the terminal housing assembly in an embodiment of the present application;

[0039] Fig.11 is a second perspective structural schematic diagram of the bayonet of the terminal housing assembly in the embodiment of the present application;

[0040] Fig.12 It is a structural schematic diagram of the application of the bayonet of the terminal shell assembly in the embodiment of the present application in the coil assembly.

[0041] In the figure: terminal housing 1, main body 11, plastic sealing platform 12, bayonet 13, first accommodating cavity 131, second accommodating cavity 132, trumpet-shaped guide portion 133, first positioning surface 134, second positioning surface 135, hollow structure 2, coil skeleton 3, blocking member 4, base 41, extension body 42, guide head 43, external plug 5. DETAILED DESCRIPTION

[0042] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] See also Figures 2 to 12 As shown, this embodiment provides a real terminal shell assembly suitable for a coil assembly, which includes: a terminal housing 1 and a blocking member 4 which are respectively injection molded and assembled into one. The terminal shell in this embodiment is used for plastic sealing connection with the coil frame 3 of the coil assembly.

[0045] Specifically, first, there is a terminal housing 1, which includes a main body 11 for forming an external plug-in sheet 5 for plugging in the coil assembly, a plastic sealing platform 12 formed on the side of the main body 11 facing the coil skeleton 3 of the coil assembly, and a bayonet 13 provided in the plastic sealing platform 12. It should be noted that the terminal housing 1 in this embodiment is integrally formed by injection molding, and the bayonet 13 is a hollow opening formed after the terminal housing 1 is demolded from the buckle mold. The shape of the hollow opening is designed to facilitate matching with the plugging member 4, and the shape of the bayonet 13 only requires the selection of a buckle mold with a matching shape. In this regard, in order to reduce the design and production costs of the buckle mold, the overall shape of the bayonet 13 in this embodiment is preferably a regular shape. This is described in detail in the following embodiment description in conjunction with the accompanying drawings.

[0046] Based on the above situation, by molding the plastic sealing platform 12 on the side of the coil skeleton 3 of the main body 11 facing the coil assembly, the plastic sealing platform 12 is directly used to be connected with the coil skeleton 3 of the coil assembly by integral injection molding, and cooperates with the load-bearing part to bear the plastic sealing pressure from the injection mold, so that the main body 11 on the side of the plastic sealing platform 12 away from the coil skeleton 3 on the overall terminal housing 1 does not directly participate in the plastic sealing, so that the plastic sealing pressure acts on the plastic sealing platform 12, changing the plastic sealing force position, so there will be no problem of deformation of the main body 11 due to the plastic sealing pressure. On this basis, by fixing the sealing piece 4 in the bayonet 13 formed by injection molding of the plastic sealing platform 12, the problem of plastic sealing material overflow during the injection molding of the terminal shell assembly and the coil assembly can be avoided.

[0047] Next is the plugging member 4, which is suitable for being press-fitted and fixed in the bayonet 13 to form a blockage for the bayonet 13; the plugging member 4 is interference-fitted with the bayonet 13. It should be noted here that the material of the plugging member 4 formed by injection molding and the material of the terminal housing 1 formed by injection molding can be the same, such as nylon, or different, and this embodiment does not make an absolute limitation on this.

[0048] Next, an optional implementation is described in detail with reference to the accompanying drawings:

[0049] Generally, the plugging member 4 is T-shaped, and the corresponding bayonet 13 has a T-shaped cavity adapted to the plugging member 4. Specifically, the plugging member 4 includes a base 41 and an extension body 42 protruding from one side end of the base 41; and the T-shaped cavity includes a first accommodating cavity 131 adapted to the base 41 and a second accommodating cavity 132 suitable for inserting the extension body 42. It should be noted that the present embodiment adopts the plugging member 4 of the above structure, so that after the terminal housing 1 and the plugging member 4 are injection molded respectively, the plugging member 4 is pressed into the bayonet 13 by using a pneumatic tool to crimp the base 41 of the plugging member 4, so that the two form a whole.

[0050] Furthermore, the dimension of the second accommodating cavity 132 perpendicular to the depth direction of the terminal housing 1 is smaller than the dimension of the second accommodating cavity 132 perpendicular to the depth direction of the terminal housing 1; the second accommodating cavity 132 is located on the side of the first accommodating cavity 131 facing away from the coil skeleton 3. It should be noted here that the depth direction referred to in this embodiment is specifically the insertion direction of the corresponding external plug-in piece 5 into the terminal housing assembly when the terminal housing assembly is used in the coil assembly.

[0051] Based on the above structure, an optional implementation is given as an example, the base 41 and the extension 42 are both rectangular parallelepiped structures; the first accommodating cavity 131 and the second accommodating cavity 132 are both rectangular parallelepiped structures; for the base 41 under this structure, its length and width dimensions perpendicular to the depth direction of the terminal housing 1 are both larger than the length and width dimensions of the extension 42 perpendicular to the depth direction of the terminal housing 1, so that a step portion in the form of a rectangular ring is formed between the side end surface of the base 41 facing the extension 42 and the four side walls of the extension 42. As for the height dimension of the base 41 along the depth direction of the terminal housing 1, it can be larger or smaller than the height dimension of the extension 42 along the depth direction of the terminal housing 1, or it can be the same, and this embodiment does not make an absolute limitation on this.

[0052] In addition, in order to improve the smoothness of the assembly operation of the blocking member 4 and the bayonet 13, the present embodiment also makes the following designs:

[0053] The first accommodating cavity 131 is formed with a gradually decreasing trumpet-shaped guide portion 133 from its cavity opening facing away from the second accommodating cavity 132 into the cavity. Preferably, the trumpet-shaped guide portion 133 has the same size along the four edges of the first accommodating cavity 131. The size here specifically includes the length H1 along the depth direction of the first accommodating cavity 131, and the angle C1 formed by the trumpet-shaped guide portion 133 relative to other parts of the first accommodating cavity 131 other than the trumpet-shaped guide portion 133. Here, the length H1 of the trumpet-shaped guide portion 133 can be designed to be 0.5 mm, and the angle C1 can be designed to be 6 degrees.

[0054] In addition, in another optional implementation, a guide head 43 is formed at the side end of the extension body 42 facing away from the base body 41; the dimension of the end face of the guide head 43 adjacent to the base body 41 is greater than the dimension of the end face of the guide head 43 away from the base body 41. With respect to the guide head 43, its dimension along the depth direction of the second accommodating cavity 132 is H3, and the angle formed by the guide head 43 relative to other parts of the extension body 42 other than the guide head 43 is C3, where H3=0.8mm and C3=14 degrees are optional.

[0055] Through the design of the trumpet-shaped guide portion 133 and the guide head 43, when the sealing piece 4 is pressed into the terminal housing 1, the sealing piece 4 can be pressed into the bayonet 13 more smoothly through the trumpet-shaped guide portion 133, and the sealing piece 4 and the terminal housing 1 will not be crushed or damaged when pneumatic pressing is used.

[0056] It should be noted here that, considering the effective sealing between the first accommodating cavity 131 and the base 41 in the matching state, the proportion of the trumpet-shaped guide portion 133 in the present embodiment to the depth of the first accommodating cavity 131 is not greater than 1 / 2. In addition, four first positioning surfaces 134 are formed in the first accommodating cavity 131, which are respectively sealed with the four side wall surfaces 411 extending along the depth direction of the T-shaped cavity on the base 41; and a second positioning surface 135 is also formed in the first accommodating cavity 131, which is sealed with the side wall surface 412 of the base 41 facing the extension body 42 and surrounding the extension body 42. The proportion of each first positioning surface 134 to the depth of the first accommodating cavity 131 is not less than 1 / 2, and the sealing effect between the first accommodating cavity 131 and the base 41 is fully guaranteed by ensuring that the contact area is large enough.

[0057] Based on the above situation, more specifically, the dimension of the base 41 along the depth direction of the first accommodating cavity 131 is D1, the depth dimension of the first accommodating cavity 131 is D2, the dimension of the extension body 42 along the depth direction of the first accommodating cavity is D3, and the depth dimension of the second accommodating cavity 132 is D4. Then, in an optional implementation, 0.8mm≤D1≤D2, 1.9mm=D3=D4.

[0058] In addition, the length surface dimension of the extension body 42 perpendicular to the depth direction of the terminal shell 1 is H7, and the width surface dimension is H5. The length surface dimension of the second accommodating cavity 132 perpendicular to the depth direction of the terminal shell 1 is H8, and the width surface dimension is H6. Then, in an optional implementation, 1.6mm<H5≤1.7mm, 6.4mm<H7≤6.5mm, 1.5mm≤H6<1.6mm, 6.3mm≤H8<6.4mm, thereby satisfying H6<H5, H8<H7, so that the sealing member 4 and the bayonet 13 form an interference fit to produce a sealing effect.

[0059] In summary, it can be seen that the present embodiment utilizes the second positioning surface 135 to fit with the side wall surface of the base 41 toward the extension body 42 and around the extension body 42 for limiting, and there is no need to worry about the sealing member 4 not being pressed into place or pressed deep; furthermore, the sealing member 4 and the terminal housing 1 have an interference fit, which on the one hand fixes the sealing member 4 in the terminal housing 1 and integrates them into one, and will not fall off; more importantly, the two form a sealing structure, thereby avoiding the problem of plastic overflow during injection molding of the terminal shell assembly and the coil assembly.

[0060] Embodiment 2:

[0061] Based on the terminal shell assembly of Example 1, this embodiment provides a coil assembly, which includes the terminal shell assembly of Example 1. The coil assembly here also includes a maturely used coil skeleton 3 in the prior art, that is, after the terminal shell assembly and the coil skeleton 3 are assembled, a structure such as a thermal protector 6 is provided on the coil assembly below the terminal housing 1, and this embodiment does not make any improvements to this, so its structure and implementation principle are not described in detail and specifically limited here.

[0062] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. 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.

[0063] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0066] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0067] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A terminal housing assembly, suitable for a coil assembly, characterized in that: include: The terminal housing includes a main body for plugging in an external plug-in sheet of the coil assembly, a plastic sealing platform formed on a side of the main body facing the coil skeleton of the coil assembly, and a bayonet provided in the plastic sealing platform; The blocking piece is suitable for being pressed and fixed in the bayonet to form a blockage for the bayonet; the blocking piece is interference fit with the bayonet.

2. The terminal housing assembly according to claim 1, characterized in that: The blocking piece is in a T shape, and the corresponding bayonet has a T-shaped cavity adapted to the blocking piece.

3. The terminal housing assembly according to claim 2, characterized in that: The blocking member comprises a base body and an extension body protruding from one side end of the base body; and The T-shaped cavity comprises a first accommodating cavity adapted to the base body and a second accommodating cavity suitable for inserting the extension body; wherein The dimension of the second accommodating cavity perpendicular to the depth direction of the terminal housing is smaller than the dimension of the second accommodating cavity perpendicular to the depth direction of the terminal housing; The second accommodating cavity is located on a side of the first accommodating cavity facing away from the coil frame.

4. The terminal housing assembly according to claim 3, characterized in that: The first accommodating cavity is provided with a gradually decreasing trumpet-shaped guide portion from its cavity opening facing away from the second accommodating cavity into the cavity.

5. The terminal housing assembly according to claim 4, characterized in that: The base and the extension body are both rectangular parallelepiped structures; the first accommodating cavity and the second accommodating cavity are both rectangular parallelepiped structures; and The dimensions of the trumpet-shaped guide portion along the four edges of the first accommodating cavity are the same.

6. The terminal housing assembly according to claim 4 or 5, characterized in that: The proportion of the horn-shaped guide portion to the depth of the first accommodating cavity is no more than 1 / 2.

7. The terminal housing assembly according to claim 5, characterized in that: The first accommodating cavity is formed with four first positioning surfaces which are respectively sealed with four side wall surfaces extending along the depth direction of the T-shaped cavity on the base body; and A second positioning surface is also formed in the first accommodating cavity and is sealed with a side wall surface of the base body facing the extension body and surrounding the extension body.

8. The terminal housing assembly according to claim 7, characterized in that: The ratio of each of the first positioning surfaces to the depth of the first accommodating cavity is not less than 1 / 2.

9. The terminal housing assembly according to any one of claims 3 to 5, characterized in that: The side end of the extension body facing away from the base body is formed with a guide head; The dimension of the end surface of the guide head adjacent to the substrate is greater than the dimension of the end surface of the guide head away from the substrate.

10. A coil assembly, characterized in that include: A terminal housing assembly as claimed in any one of claims 1 to 9.

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