Shell structure replacing integrated injection molding insert, copper bar fixing structure and distribution box

Abstract

The utility model provides a shell structure replacing an integrated injection molding insert, a copper bar fixing structure and a distribution box, the shell structure replacing the integrated injection molding insert comprises a plastic shell and a first locking piece, the plastic shell is provided with a limiting hole extending to the surface of the plastic shell, and the first locking piece is provided with a contact surface; the first locking piece is movably arranged in the plastic shell and is limited by the limiting hole to be separated from the plastic shell, and when the first locking piece is limited by the limiting hole, the contact face of the first locking piece is higher than the surface of the plastic shell. When the copper bar is locked, the contact face of the first locking piece can protrude out of the surface of the plastic shell to make full contact with the copper bar, locking is firmer, the first locking piece can be flexibly adjusted to reach a proper position, the assembly tolerance caused by machining precision can be reduced, and the requirement for the machining precision of parts is low.

Description

Technical Field

[0001] The utility model relates to the field of assembly of electrical components, and particularly relates to a housing structure, a copper bar fixing structure and a distribution box for replacing an integrally injection-molded insert. Background Art

[0002] A BDU (Battery Disconnect Unit) battery pack disconnect unit, which is designed specifically for the inside of a battery pack and is also a kind of distribution box; it is used to protect battery modules inside an electric vehicle battery box. Since the BDU product needs to be externally connected to a copper bar, in the prior art, a plastic housing of the BDU product pre-buries and locks fasteners (such as studs or nuts, etc.) by injection molding, and then locks and fixes the copper bar. However, by pre-burying through injection molding, due to deviations in dimensions or placement positions, etc., the relative position of the locking fastener and the plastic housing is not fixed, which may cause the contact surface of the locking fastener for contacting the copper bar to be inclined or recessed on the surface of the plastic housing, and it cannot be adjusted after injection molding; ultimately resulting in a large assembly gap with the copper bar, local stress will be generated after locking, causing problems such as poor locking and torque attenuation. Summary of the Utility Model

[0003] Therefore, to solve the above problems, the utility model provides a housing structure, a copper bar fixing structure and a distribution box for replacing an integrally injection-molded insert.

[0004] To achieve the above object, the technical solution provided by the utility model is as follows:

[0005] A housing structure for replacing an integrally injection-molded insert, comprising a plastic housing and a first locking fastener. A limiting hole extending to its surface is provided on the plastic housing, and the first locking fastener has a contact surface; the first locking fastener is movably arranged in the plastic housing and is restricted by the limiting hole from detaching from the plastic housing, and when the first locking fastener is restricted by the limiting hole, its contact surface is higher than the surface of the plastic housing.

[0006] Further, an installation channel penetrating through the bottom of the plastic housing is provided in the plastic housing, and the limiting hole communicates with the installation channel; the first locking fastener is inserted into the plastic housing through the bottom of the installation channel.

[0007] Further, define the side wall of the plastic housing where the limiting hole is opened as the top side wall; the side wall of the installation channel is an elastic side wall, and a blocking portion extends inward from the side wall of the installation channel. A receiving space is formed between the blocking portion and the top side wall, and the first locking fastener is restricted by the blocking portion and is movably arranged in the receiving space.

[0008] Further, the blocking portion is a blocking step, and the surface of the blocking step facing the bottom of the installation channel is an inclined guiding surface; the side wall of the first locking fastener is an inclined side wall matching the inclined guiding surface.

[0009] Furthermore, the blocking portion is a blocking rib, and the first locking member passes over the blocking rib and enters into the accommodating space by interference fitting.

[0010] Furthermore, the first locking member is restricted in the installation channel by an external limiting member.

[0011] Furthermore, the hole wall of the limiting hole is an inclined hole wall that is narrow at the top and wide at the bottom, and the side wall of the first locking component is an inclined side wall that cooperates with the inclined hole wall; and the contact surface of the first locking component is smaller than the minimum hole diameter of the limiting hole; the inclined side wall of the first locking component presses against the inclined hole wall of the limiting hole and is limited by the limiting hole, and makes the contact surface higher than the surface of the plastic shell.

[0012] Furthermore, the first locking component includes an upper part and a lower part that are connected, the radial dimension of the upper part is smaller than the radial dimension of the lower part, so that the outer edge of the lower part protrudes from the upper part and forms a limiting step; the surface of the upper part is the contact surface; when the first locking component is limited by the limiting hole, the limiting step is pressed against the inner wall of the plastic shell, and the upper part passes through the limiting hole so that the contact surface is higher than the surface of the plastic shell.

[0013] Furthermore, the first locking member is a stud or a nut.

[0014] A copper bar fixing structure comprises the above-mentioned shell structure replacing the integral injection molded insert, a copper bar and a second locking component; the copper bar contacts the contact surface of the first locking component which is higher than the surface of the plastic shell, and the second locking component is locked on the first locking component to jointly clamp and fix the copper bar.

[0015] A distribution box, wherein the shell structure of the distribution box is the copper busbar fixing structure described above.

[0016] The technical solution provided by the utility model has the following beneficial effects:

[0017] The plastic shell and the first locking member are assembled, the first locking member is movably arranged in the plastic shell, and when the first locking member is restricted by the limiting hole, its contact surface is higher than the surface of the plastic shell. With such an arrangement, when locking the copper bar, the contact surface of the first locking member can protrude from the surface of the plastic shell and fully contact the copper bar, so that the locking is more secure, and the first locking member can be flexibly adjusted to reach a suitable position, which can reduce the assembly tolerance caused by the processing accuracy, and the processing accuracy requirements of the parts are low; and effectively avoid the problems of poor locking, torque attenuation, etc. caused by the generation of local stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the housing structure replacing the integral injection molded insert in the first embodiment;

[0019] Figure 2 Shown is an assembly schematic diagram of the housing structure replacing the integral injection-molded insert in the first embodiment;

[0020] Figure 3 Shown is a schematic diagram of the copper busbar fixing structure in the first embodiment;

[0021] Figure 4 Shown is one of the schematic diagrams of the first locking member in the first embodiment;

[0022] Figure 5 Shown is another schematic diagram of the first locking member in the first embodiment;

[0023] Figure 6 Shown is a schematic diagram of the copper busbar fixing structure in the third embodiment;

[0024] Figure 7 Shown is a schematic diagram of the copper busbar fixing structure in the fourth embodiment;

[0025] Figure 8 Shown is a schematic diagram of the first locking member in the fourth embodiment;

[0026] Figure 9 Shown is a schematic diagram of the copper busbar fixing structure in the fifth embodiment;

[0027] Figure 10 Shown is one of the schematic diagrams of the first locking member in the fifth embodiment;

[0028] Figure 11 Shown is another schematic diagram of the first locking member in the fifth embodiment;

[0029] Figure 12 Shown is a schematic diagram of the copper busbar fixing structure in the sixth embodiment. Detailed implementation manners

[0030] To further illustrate each embodiment, the present invention provides drawings. These drawings are a part of the disclosure of the present invention, and are mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0031] In the description of the present invention, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation of the present invention.

[0032] The present utility model will be further described in conjunction with the drawings and specific embodiments.

[0033] Embodiment 1

[0034] Refer to Figure 1 and Figure 2 As shown, a housing structure for replacing an integrally injection-molded insert provided in this embodiment includes a plastic housing 10 and a first locking member 20. A limiting hole 101 extending to its surface 104 is provided on the plastic housing 10. Specifically, the first locking member 20 is a stud 21; the first locking member 20 has a contact surface 201; this contact surface 201 is the top surface of the nut 211 of the stud 21; the first locking member 20 is movably arranged in the plastic housing 10 and is restricted by the limiting hole 101 from detaching from the plastic housing 10. Specifically, the nut 211 of the stud 21 is restricted within the plastic housing 10, and the rod portion 212 of the stud 21 extends upward through the limiting hole 101, and the limiting hole 101 restricts the nut 211 of the stud 21 from detaching upward from the plastic housing 10; and when the first locking member 20 is restricted by the limiting hole 101, its contact surface 201 is higher than the surface 104 of the plastic housing 10, as Figure 1 shown.

[0035] Continue to refer to Figure 3 As shown, this embodiment also provides a copper busbar fixing structure, which includes the housing structure for replacing the integrally injection-molded insert described above, a copper busbar 1, and a second locking member 30; specifically, in this embodiment, the housing structure for replacing the integrally injection-molded insert is the housing of a distribution box (of course, it can also be the outer housing of other electrical appliances), and the second locking member 30 is a nut 31; the copper busbar 1 is in contact with the contact surface 201 of the first locking member 20 that is higher than the surface 104 of the plastic housing 10. That is, during installation, the copper busbar 1 is sleeved on the rod portion 212 of the stud 21, and then the nut 31 is locked on the rod portion 212 of the stud 21 until it is tightened (clamping and fixing the copper busbar 1 together); during the process, due to the movable arrangement of the first locking member 20, the first locking member 20 can move upward so that its contact surface 201 is higher than the surface 104 of the plastic housing 10 to form sufficient contact with the copper busbar 1, and the locking is more firm. The first locking member 20 can be flexibly adjusted to reach a suitable position, which can reduce the assembly tolerance caused by machining accuracy, and the machining accuracy requirements for parts are low; and it can effectively avoid problems such as poor locking and torque attenuation caused by the generation of local stress.

[0036] Further, in this embodiment, an installation channel 102 penetrating through the bottom of the plastic housing 10 is provided inside the plastic housing 10, and the limiting hole 101 communicates with the installation channel 102; the aperture of the limiting hole 101 is smaller than that of the installation channel 102. The first locking member 20 is inserted into the plastic housing 10 from the bottom of the installation channel 102.

[0037] Specifically, the side wall of the plastic housing 10 where the limiting hole 101 is opened is defined as the top side wall 11; the top side wall 11 and the side wall 12 of the installation channel 102 are integrally connected. The side wall 12 of the installation channel 102 is an elastic side wall and has a certain elastic deformation. A blocking portion 121 also extends inward from the side wall 12 of the installation channel 102. A receiving space 103 is formed between the blocking portion 121 and the top side wall 11, and the first locking member 20 is restrictedly and movably arranged in the receiving space 103 by the blocking portion 121.

[0038] Further, the blocking portion 121 is a blocking step, and the surface of the blocking step facing the bottom of the installation channel 102 is an inclined guiding surface 122; the side wall of the first locking member 20 (i.e., the side wall of the nut 211 of the stud 21) is an inclined side wall 202 that cooperates with the inclined guiding surface 122. Specifically, in this embodiment, the slope of the inclined side wall 202 is different from that of the inclined guiding surface 122. Of course, they can also be the same in other embodiments. The first locking member 20 is inserted from the bottom of the installation channel 102 until it contacts the blocking portion 121. The inclined side wall 202 of the first locking member 20 abuts against the inclined guiding surface 122 of the blocking portion 121. At this time, an upward external force is applied to the first locking member 20 to force the side wall 12 of the installation channel 102 to deform outward, so that the first locking member 20 crosses the blocking portion 121 and enters the receiving space 103. After that, the side wall 12 of the installation channel 102 resumes deformation, and the nut 211 of the stud 21 is restricted in the receiving space 103.

[0039] Meanwhile, the hole wall of the limiting hole 101 is an inclined hole wall 111 that is narrow at the top and wide at the bottom. The size of the contact surface 201 of the first locking member 20 is smaller than the minimum aperture of the limiting hole 101. Specifically, the slope of the inclined hole wall 111 of the limiting hole 101 is the same as that of the inclined side wall 202 of the first locking member 20. The purpose is that when performing limiting, the two side walls can be attached to each other to achieve stable limiting. When the stud 21 moves upward, the inclined side wall 202 of the stud 21 abuts against the inclined hole wall 111 of the limiting hole 101 and is restricted by the limiting hole 101, and the contact surface 201 is higher than the surface 104 of the plastic housing 10.

[0040] Specifically, in this embodiment, the shape of the nut 211 of the stud 21 can be Figure 4 circular as shown, or can be Figure 5Square as shown, or other shapes such as triangles, hexagons, etc.

[0041] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0042] Embodiment Two

[0043] A housing structure provided in this embodiment to replace the integral injection molding insert is substantially the same as the structure of Embodiment One, except that: in this embodiment, the blocking portion 121 is a blocking rib. The setting of the blocking rib makes the minimum aperture of the installation channel 102 slightly smaller than the diameter of the first locking member 20. Thus, when being installed, the first locking member 20 enters the accommodation space 103 by means of interference fit over the blocking rib; that is, when the first locking member 20 is installed in the installation channel 102, its outer periphery abuts against the blocking rib. Under the action of an external force, the first locking member 20 forces the side wall 12 of the installation channel 102 to deform outward, so that the first locking member 20 crosses the blocking rib and enters the accommodation space 103. After that, the side wall 12 of the installation channel 102 resumes deformation, and the blocking rib restricts the nut 211 of the stud 21 in the accommodation space 103.

[0044] A copper bar fixing structure provided in this embodiment adopts the housing structure provided in this embodiment to replace the integral injection molding insert.

[0045] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0046] Embodiment Three

[0047] A housing structure provided in this embodiment to replace the integral injection molding insert is substantially the same as the structure of Embodiment One, except that: as shown in Figure 6 In this embodiment, the structure of the blocking portion 121 in Embodiment One is not designed, and the first locking member 20 is restricted in the installation channel 102 by an external limiting member 2; that is, after the first locking member 20 is installed in the installation channel 102, it is restricted in the installation channel 102 by the external limiting member 2 (such as a limiting tooling); after the first locking member 20 completes the fixed assembly with the copper bar 1 and the second locking member 30, the external limiting member 2 is removed.

[0048] A copper bar fixing structure provided in this embodiment adopts the housing structure provided in this embodiment to replace the integral injection molding insert.

[0049] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0050] Embodiment Four

[0051] A housing structure that replaces the integrally injection-molded insert provided in this embodiment is substantially the same as the structure in Embodiment 1, except that: Refer to Figure 7 and Figure 8 As shown, in this embodiment, the first locking member 20 (i.e., the nut 211 of the stud 21) includes an upper part 213 and a lower part 214 connected to each other. The radial dimension of the upper part 213 is smaller than the radial dimension of the lower part 214, so that the outer edge of the lower part 214 protrudes from the upper part 213 to form a limiting step 215; that is, the cross-section of the nut 211 of the stud 21 is similar to a "convex" shape. The surface of the upper part 213 is the contact surface 201; when the first locking member 20 is restricted by the limiting hole 101, it abuts against the inner wall of the plastic housing 10 through the limiting step 215, and the upper part 213 passes through the limiting hole 101 so that the contact surface 201 is higher than the surface 104 of the plastic housing 10; thus, the first locking member 20 can also be well restricted from detaching from the plastic housing 10.

[0052] Meanwhile, the limiting of the first locking member 20 is, as in Embodiment 3, restricted by an external limiting member 2 in the installation channel 102; after the first locking member 20 completes the fixed assembly with the copper bar 1 and the second locking member 30, the external limiting member 2 is removed.

[0053] A copper bar fixing structure provided in this embodiment adopts the housing structure that replaces the integrally injection-molded insert provided in this embodiment.

[0054] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0055] Embodiment 5

[0056] A housing structure that replaces the integrally injection-molded insert provided in this embodiment is substantially the same as the structure in Embodiment 1, except that: Refer to Figure 9 As shown, in this embodiment, the first locking member 20 is a nut 22, and the upper surface of the nut 22 is the contact surface 201; the outer side wall of the nut 22 is an inclined side wall 202, and the cooperation structure of the nut 22 with the blocking step and the cooperation structure of the nut 22 with the limiting hole 101 are both the same as the cooperation structure in Embodiment 1, realizing the movable setting of the nut 22 in the plastic housing 10, which will not be repeated here.

[0057] Specifically, the outer shape of the nut 22 can be circular as shown in Figure 10 shown, or square as shown in Figure 11 shown, or other shapes such as triangular, hexagonal, etc.

[0058] A copper bar fixing structure provided in this embodiment adopts the housing structure that replaces the integral injection molding insert in this embodiment. Correspondingly, the second locking member 30 uses a stud 32. The rod portion of the stud 32 passes through the copper bar 1 and is locked with the nut 22. The upper surface of the nut 22 can protrude from the surface 104 of the plastic housing 10 to make full contact with the copper bar 1. It can reduce the assembly tolerance caused by machining accuracy, and the machining accuracy requirements for parts are low.

[0059] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0060] Embodiment Six

[0061] A housing structure that replaces the integral injection molding insert provided in this embodiment is substantially the same as the structure in Embodiment Five, except that: as shown in reference to Figure 12 In this embodiment, the structure of the blocking portion 121 is not designed, and the first locking member 20 (i.e., the nut 22) is restricted in the installation channel 102 by the external limiting member 2; that is, after the first locking member 20 is installed in the installation channel 102, it is restricted in the installation channel 102 by the external limiting member 2 (such as a limiting tooling); after the first locking member 20 completes the fixed assembly with the copper bar 1 and the second locking member 30, the external limiting member 2 is removed.

[0062] A copper bar fixing structure provided in this embodiment adopts the housing structure that replaces the integral injection molding insert provided in this embodiment.

[0063] This embodiment also provides a distribution box, wherein the housing structure of the distribution box is the copper bar fixing structure described above.

[0064] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them fall within the protection scope of the present invention.

Claims

1. A housing structure for replacing an integrally injection-molded insert, comprising a plastic housing and a first locking member, characterized in that: The plastic housing is provided with a limiting hole extending to its surface, and the first locking member has a contact surface; the first locking member is movably arranged in the plastic housing and is restricted by the limiting hole from detaching from the plastic housing, and when the first locking member is restricted by the limiting hole, its contact surface is higher than the surface of the plastic housing.

2. The housing structure substituting the integrated injection molding insert according to claim 1, wherein: An installation channel penetrating the bottom of the plastic housing is provided in the plastic housing, and the limiting hole communicates with the installation channel; the first locking member is inserted into the plastic housing through the bottom of the installation channel.

3. The housing structure substituting the integrated injection-molded insert according to claim 2, characterized in that: Define the side wall of the plastic housing where the limiting hole is opened as the top side wall; the side wall of the installation channel is an elastic side wall, and a blocking portion extends inward from the side wall of the installation channel. A receiving space is formed between the blocking portion and the top side wall, and the first locking member is restricted by the blocking portion and is movably arranged in the receiving space.

4. The housing structure substituting the integrated injection-molded insert according to claim 3, wherein: The blocking portion is a blocking step, and the surface of the blocking step facing the bottom of the installation channel is an inclined guiding surface; the side wall of the first locking member is an inclined side wall that cooperates with the inclined guiding surface.

5. The housing structure substituting the integrally injection-molded insert according to claim 3, characterized in that: The blocking portion is a blocking rib, and the first locking member enters the receiving space by passing over the blocking rib through interference fitting.

6. The housing structure substituting the integrated injection molding insert according to claim 2, characterized in that: The first locking member is restricted in the installation channel by an external limiting member.

7. The housing structure substituting the integral injection-molded insert according to claim 1 or 2, characterized in that: The hole wall of the limiting hole is an inclined hole wall that is narrow at the top and wide at the bottom, and the side wall of the first locking member is an inclined side wall that cooperates with the inclined hole wall; and the contact surface of the first locking member is smaller than the minimum aperture of the limiting hole; the inclined side wall of the first locking member abuts against the inclined hole wall of the limiting hole and is restricted by the limiting hole, and the contact surface is higher than the surface of the plastic housing.

8. The housing structure substituting the integrated injection-molded insert according to claim 1 or 2, characterized in that: The first locking member includes an upper part and a lower part connected to each other. The radial dimension of the upper part is smaller than that of the lower part, so that the outer edge of the lower part protrudes beyond the upper part and forms a limiting step; the surface of the upper part is the contact surface; when the first locking member is restricted by the limiting hole, it abuts against the inner wall of the plastic housing through the limiting step, and the upper part passes through the limiting hole to make the contact surface higher than the surface of the plastic housing.

9. The housing structure substituting the integrally injection-molded insert according to claim 1, wherein: The first locking member is a stud or a nut.

10. A copper bar fixing structure, characterized in that: It includes a housing structure, a copper bar, and a second locking member that replace the integral injection-molded insert according to any one of claims 1 to 9; the copper bar is in contact with the contact surface of the first locking member that is higher than the surface of the plastic housing, and the second locking member locks onto the first locking member to jointly clamp and fix the copper bar.

11. A distribution box, characterized in that: The housing structure of the distribution box is the copper bar fixing structure described in claim 10 above.

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