A snap-fit connection structure and a transmission case

Abstract

The utility model relates to vehicle parts technical field especially, it relates to a buckle type connecting structure and transmission case, buckle type connecting structure includes inner buckle spare, forms on first copper row, first clamping portion is formed on the inner buckle spare, first clamping portion protrudes the outer wall of inner buckle spare, and outer buckle spare forms on second copper row, the outer buckle spare is sleeved in the inner buckle spare, second clamping portion is formed on the outer buckle spare, second clamping portion is concave in the inner wall of inner buckle spare, first clamping portion and second clamping portion clamping. The buckle type connecting structure and transmission case can solve the problem that the connecting mode between existing copper row is difficult to satisfy the use demand of transmission case.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to a snap-fit ​​connection structure and a transmission box. Background Technology

[0002] In vehicles, the hybrid gearbox motor and electronic control unit are typically connected via three-phase copper busbars. Currently, the most common method for connecting copper busbars in the industry is bolt connection, which involves passing bolts through two copper busbars and then securing them by tightening nuts.

[0003] However, under conditions such as high-speed operation, start-stop, and acceleration, the transmission box will inevitably vibrate, causing the bolts and nuts to loosen. This loosening will further lead to poor contact between the copper busbars. When the current density increases and the current carrying capacity is too large, the copper busbars will burn out, ultimately causing the transmission box to malfunction. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a snap-fit ​​connection structure and a transmission box to solve the problem that the existing connection methods between copper busbars cannot meet the usage requirements of the transmission box.

[0005] According to a first aspect of the present invention, a snap-fit ​​connection structure is provided, wherein the snap-fit ​​connection structure includes: an inner snap-fit ​​member formed on a first copper busbar, the inner snap-fit ​​member having a first snap-fit ​​portion protruding from the outer wall of the inner snap-fit ​​member; and an outer snap-fit ​​member formed on a second copper busbar, the outer snap-fit ​​member being sleeved on the inner snap-fit ​​member, the outer snap-fit ​​member having a second snap-fit ​​portion recessed within the inner wall of the inner snap-fit ​​member, the first snap-fit ​​portion engaging with the second snap-fit ​​portion.

[0006] Preferably, the inner fastener has a first conical cylindrical portion, the first snap-fit ​​portion is formed on the outer wall of the first conical cylindrical portion, the outer fastener has a second conical cylindrical portion, the second snap-fit ​​portion is formed on the inner wall of the second conical cylindrical portion, and the second conical cylindrical portion is sleeved on the first conical cylindrical portion.

[0007] Preferably, the first snap-fit ​​portion is a spherical protrusion, and a plurality of first snap-fit ​​portions are spaced apart on the outer periphery of the inner snap fastener; the second snap-fit ​​portion is a spherical groove, and a plurality of second snap-fit ​​portions are arranged in a one-to-one correspondence with a plurality of first snap-fit ​​portions, the second snap-fit ​​portion is formed as a protruding structure on the outer surface of the second conical cylindrical portion, and the first snap-fit ​​portion is attached to the second snap-fit ​​portion.

[0008] Preferably, the first end of the inner fastener has a rolled edge structure, the first part of the rolled edge structure extends away from the axis of the inner fastener and the first part of the rolled edge structure extends away from the first end of the inner fastener, the second part of the rolled edge structure extends towards the axis of the inner fastener and the second part of the rolled edge structure extends towards the first end of the inner fastener.

[0009] Preferably, the first end of the outer fastener has a flange structure, the flange structure extends away from the axis of the outer fastener, and the flange structure is snapped inside the rolled edge structure.

[0010] Preferably, the inner fastener has multiple strip-shaped slits formed on it, the strip-shaped slits extending along the length of the inner fastener, and the multiple strip-shaped slits are spaced apart on the outer periphery of the inner fastener.

[0011] Preferably, the strip-shaped slit is formed on the first conical cylindrical portion and the rolled edge structure.

[0012] Preferably, the second end of the inner fastener has a first chamfer, the angle between the outer surface of the first chamfer and the axis of the inner fastener is greater than the angle between the outer surface of the first conical cylindrical portion and the axis of the inner fastener, and the diameter of the first chamfer gradually increases in the direction away from the first end of the inner fastener; the second end of the outer fastener has a second chamfer, the angle between the inner surface of the second chamfer and the axis of the outer fastener is greater than the angle between the inner surface of the second conical cylindrical portion and the axis of the outer fastener, and the diameter of the second chamfer gradually increases in the direction away from the first end of the outer fastener; the inner surface of the second chamfer fits against the outer surface of the first chamfer.

[0013] Preferably, the diameter of the first conical cylinder gradually decreases in the direction away from the second end of the inner fastener, the diameter of the second conical cylinder gradually decreases in the direction away from the second end of the outer fastener, and the inner surface of the second conical cylinder fits against the outer surface of the first conical cylinder.

[0014] According to a second aspect of the present invention, a transmission box is provided, wherein the transmission box includes a snap-fit ​​connection as described above.

[0015] The snap-fit ​​connection structure and transmission box of this utility model embodiment have an inner snap-fit ​​member formed on a first copper busbar, and a first snap-fit ​​portion formed on the inner snap-fit ​​member. The first snap-fit ​​portion protrudes from the outer wall of the inner snap-fit ​​member. An outer snap-fit ​​member is formed on a second copper busbar, and the outer snap-fit ​​member is sleeved on the inner snap-fit ​​member. A second snap-fit ​​portion is formed on the outer snap-fit ​​member, and the second snap-fit ​​portion is recessed into the inner wall of the inner snap-fit ​​member, so that the first snap-fit ​​portion can engage with the second snap-fit ​​portion. This can replace the original bolt connection method, effectively increase the mating area, and avoid the copper busbar burning due to excessive current density. This can effectively solve the problem that the existing connection method between copper busbars cannot meet the usage requirements of the transmission box.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the snap-fit ​​connection structure according to the present invention.

[0019] Figure 2 This is a cross-sectional view of the snap-fit ​​connection structure according to this utility model.

[0020] Figure 3 This is a schematic diagram of the inner snap-fit ​​component of the snap-fit ​​connection structure according to this utility model.

[0021] Figure 4 This is a schematic diagram of the inner snap-fit ​​component of the snap-fit ​​connection structure according to this utility model from another angle.

[0022] Figure 5 This is a schematic diagram of the outer snap fastener of the snap-fit ​​connection structure according to this utility model.

[0023] Figure 6 This is a schematic diagram of the outer buckle of the snap-fit ​​connection structure according to this utility model from another angle.

[0024] Reference numerals: 1-Inner fastener; 10-First snap-fit ​​part; 11-First conical cylindrical part; 12-First chamfered part; 2-Outer fastener; 20-Second snap-fit ​​part; 21-Second conical cylindrical part; 22-Second chamfered part; 3-Rolled edge structure; 31-First part; 32-Second part; 4-Flanged edge structure; 5-Striped slit. Detailed Implementation

[0025] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0027] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0028] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0029] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0030] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0031] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0032] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0033] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0034] like Figures 1 to 6 As shown, according to a first aspect of the present invention, a snap-fit ​​connection structure is provided, which includes an inner snap-fit ​​member 1 and an outer snap-fit ​​member 2.

[0035] In the following description, reference will be made to Figures 1 to 6 The specific structure of the above-mentioned components of the snap-fit ​​connection structure and the connection relationship of the above-mentioned components are described in detail.

[0036] like Figures 1 to 6As shown, in this embodiment, the inner snap-fit ​​member 1 can be formed on the first copper busbar. A first snap-fit ​​portion 10 can be formed on the inner snap-fit ​​member 1, protruding from the outer wall of the inner snap-fit ​​member 1. An outer snap-fit ​​member 2 can be formed on the first copper busbar, and the outer snap-fit ​​member 2 can be sleeved on the inner snap-fit ​​member 1, thereby electrically connecting the first copper busbar and the second copper busbar. A second snap-fit ​​portion 20 can be formed on the outer snap-fit ​​member 2, the second snap-fit ​​portion 20 being recessed into the inner wall of the inner snap-fit ​​member 1, allowing the first snap-fit ​​portion 10 to snap into the second snap-fit ​​portion 20, thereby fixing the inner snap-fit ​​member 1 and the outer snap-fit ​​member 2. This snap-fit ​​connection structure can replace the original bolt connection method, thereby effectively increasing the mating area and avoiding copper busbar burn-out due to excessive current density. Furthermore, the snap-fit ​​connection structure is easy to assemble, eliminating the need for additional connectors such as bolts, thus saving assembly costs.

[0037] Preferred, such as Figures 1 to 6 As shown, in this embodiment, the inner fastener 1 and the outer fastener 2 can be formed by stamping thin copper parts of 0.8mm thickness. Specifically, the first copper busbar can be integrally formed with the inner fastener 1, and the second copper busbar can be integrally formed with the outer fastener 2. The inner fastener 1 can have a first conical cylindrical portion 11. The first engaging portion 10 can be formed on the outer wall of the first conical cylindrical portion 11. The outer fastener 2 can have a second conical cylindrical portion 21. The second engaging portion 20 can be formed on the inner wall of the second conical cylindrical portion 21. When the inner fastener 1 and the outer fastener 2 are connected, the second conical cylindrical portion 21 is fitted onto the first conical cylindrical portion 11, thereby engaging the first engaging portion 10 and the second engaging portion 20.

[0038] Furthermore, preferably, such as Figures 1 to 6 As shown, in this embodiment, the first engaging portion 10 can be a spherical protrusion, and the first engaging portion 10 is formed on the outer surface of the first conical cylindrical portion 11. Multiple first engaging portions 10 can be spaced apart on the outer periphery of the inner fastener 1. The second engaging portion 20 can be a spherical groove, and the second engaging portion 20 is formed on the inner surface of the second conical cylindrical portion 21. Multiple second engaging portions 20 can be arranged in a one-to-one correspondence with multiple first engaging portions 10 to ensure the connection strength between the inner fastener 1 and the outer fastener 2. The second engaging portion 20 can be formed as a protruding structure on the outer surface of the second conical cylindrical portion 21 (i.e., formed as...). Figure 1 (The bulge structure shown). The first snap-fit ​​part 10 is attached to the second snap-fit ​​part 20. The spherical contact fit can effectively prevent relative displacement between the inner snap fastener 1 and the outer snap fastener 2.

[0039] Preferred, such as Figures 1 to 4 As shown, in the embodiment, the first end of the inner fastener 1 (such as...) Figure 4The lower end shown may have a rolled edge structure 3. The rolled edge structure 3 may include a first portion 31 and a second portion 32. The first portion 31 may extend in a direction away from the axis of the inner fastener 1, and the first portion 31 of the rolled edge structure 3 extends in a direction away from the first end of the inner fastener 1 (i.e., the first portion 31 as shown) Figure 2 (As shown, extending obliquely upward). The second part 32 of the rolled edge structure 3 can extend in a direction close to the axis of the inner fastener 1, and the second part 32 of the rolled edge structure 3 extends in a direction close to the first end of the inner fastener 1, thereby forming the rolled edge structure 3.

[0040] Further optimized, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in the embodiment, the first end of the outer fastener 2 (e.g. Figure 6 The lower end shown may have a flange structure 4. The flange structure 4 may extend in a direction away from the axis of the outer fastener 2, and the flange structure 4 extends in a direction away from the first end of the outer fastener 2 (i.e., the flange structure 4 is as shown). Figure 2 (As shown, extending obliquely upwards). When the outer fastener 2 is fitted onto the inner fastener 1, the flange structure 4 can be snapped back into the rolled edge structure 3, that is, the outer fastener 2 is attached to the first part 31 of the rolled edge structure 3, and the end of the outer fastener 2 is covered by the second part 32 of the rolled edge structure 3. This arrangement can effectively prevent the outer fastener 2 from loosening from the inner fastener 1, making the snap-fit ​​connection structure safer and more reliable.

[0041] In addition, preferred, such as Figures 1 to 6 As shown, in the embodiment, the second end of the inner fastener 1 (such as...) Figure 4 The upper end shown may have a first chamfered portion 12. The angle between the outer surface of the first chamfered portion 12 and the axis of the inner fastener 1 is greater than the angle between the outer surface of the first tapered cylindrical portion 11 and the axis of the inner fastener 1. The diameter of the first chamfered portion 12 gradually increases in the direction away from the first end of the inner fastener 1. Similarly, the second end of the outer fastener 2 (as shown) may have a first chamfered portion 12. Figure 5 The upper end shown may have a second chamfered portion 22. The angle between the inner surface of the second chamfered portion 22 and the axis of the outer fastener 2 is greater than the angle between the inner surface of the second conical cylindrical portion 21 and the axis of the outer fastener 2. The diameter of the second chamfered portion 22 gradually increases in the direction away from the first end of the outer fastener 2, and the inner surface of the second chamfered portion 22 is in contact with the outer surface of the first chamfered portion 12. This arrangement ensures that when the outer fastener 2 is fitted onto the inner fastener 1, the first chamfered portion 12 and the second chamfered portion 22 allow the inner surface of the outer fastener 2 to fit more closely to the outer surface of the inner fastener 1, thereby further preventing poor contact.

[0042] Furthermore, preferably, such as Figures 1 to 6 As shown, in this embodiment, the diameter of the first tapered cylindrical portion 11 can gradually decrease in the direction away from the second end of the inner fastener 1. The diameter of the second tapered cylindrical portion 21 can gradually decrease in the direction away from the second end of the outer fastener 2. The inner surface of the second tapered cylindrical portion 21 is attached to the outer surface of the first tapered cylindrical portion 11. During installation, the first end of the inner fastener 1 can be inserted into the second end of the outer fastener 2, and finally the first end of the inner fastener 1 can be passed through the first end of the outer fastener 2.

[0043] Further optimized, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the inner fastener 1 may also have multiple strip-shaped slits 5, which extend along the length of the inner fastener 1 (i.e., from the first end of the inner fastener 1 to the second end). The multiple strip-shaped slits 5 are spaced apart on the outer periphery of the inner fastener 1, and can be positioned between two adjacent first engaging portions 10. Further, preferably, the strip-shaped slits 5 can be formed on the first conical cylindrical portion 11 and the rolled edge structure 3. This arrangement allows the inner fastener 1 to contract inwards to a certain extent, facilitating the passage of the outer fastener 2.

[0044] In addition, such as Figures 1 to 6 As shown, according to a second aspect of the present invention, a transmission box is provided, which may include the snap-fit ​​connection structure described above. The transmission box can be a vehicle transmission box, the first copper busbar can be a motor busbar, the second copper busbar can be an electronic control component busbar, and the motor and the electronic control component are electrically connected via the snap-fit ​​connection structure.

[0045] During use, the inner snap-fit ​​member 1 is formed on the first copper busbar, and the outer snap-fit ​​member 2 is formed on the second copper busbar. The inner snap-fit ​​member 1 and the outer snap-fit ​​member 2 are snapped together and fixed by the first snap-fit ​​part 10 and the second snap-fit ​​part 20, thereby replacing the original bolt connection between copper busbars. This effectively increases the mating area between the copper busbars and avoids copper busbar burning due to excessive current density. In addition, the snap-fit ​​connection structure is easy to assemble, eliminating the need for additional connecting parts such as bolts, thus saving assembly costs.

[0046] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A snap-fit ​​connection structure, characterized in that, The snap-fit ​​connection structure includes: An inner fastener is formed on a first copper busbar, and a first engaging portion is formed on the inner fastener, the first engaging portion protruding from the outer wall of the inner fastener; and An outer fastener is formed on the second copper busbar. The outer fastener is sleeved on the inner fastener. A second snap-fit ​​portion is formed on the outer fastener. The second snap-fit ​​portion is recessed into the inner wall of the inner fastener. The first snap-fit ​​portion snaps into the second snap-fit ​​portion.

2. The snap-fit ​​connection structure according to claim 1, characterized in that, The inner fastener has a first conical cylindrical portion, and the first snap-fit ​​portion is formed on the outer wall of the first conical cylindrical portion. The outer fastener has a second conical cylindrical portion, and the second snap-fit ​​portion is formed on the inner wall of the second conical cylindrical portion. The second conical cylindrical portion is sleeved on the first conical cylindrical portion.

3. The snap-fit ​​connection structure according to claim 2, characterized in that, The first snap-fit ​​portion is a spherical protrusion, and multiple first snap-fit ​​portions are spaced apart on the outer periphery of the inner snap fastener; The second snap-fit ​​portion is a spherical groove, and multiple second snap-fit ​​portions are provided in a one-to-one correspondence with multiple first snap-fit ​​portions. The second snap-fit ​​portion is formed as a protruding structure on the outer surface of the second conical cylindrical portion, and the first snap-fit ​​portion is attached to the second snap-fit ​​portion.

4. The snap-fit ​​connection structure according to claim 2, characterized in that, The first end of the inner fastener has a rolled edge structure. The first part of the rolled edge structure extends away from the axis of the inner fastener and extends away from the first end of the inner fastener. The second part of the rolled edge structure extends towards the axis of the inner fastener and extends towards the first end of the inner fastener.

5. The snap-fit ​​connection structure according to claim 4, characterized in that, The first end of the outer fastener has a flange structure, which extends away from the axis of the outer fastener and is fastened inside the rolled edge structure.

6. The snap-fit ​​connection structure according to claim 4, characterized in that, The inner fastener has multiple strip-shaped slits formed on it, which extend along the length of the inner fastener, and the multiple strip-shaped slits are spaced apart on the outer periphery of the inner fastener.

7. The snap-fit ​​connection structure according to claim 6, characterized in that, The strip-shaped slit is formed on the first conical cylindrical portion and the rolled edge structure.

8. The snap-fit ​​connection structure according to claim 2, characterized in that, The second end of the inner fastener has a first chamfered portion. The angle between the outer surface of the first chamfered portion and the axis of the inner fastener is greater than the angle between the outer surface of the first conical cylindrical portion and the axis of the inner fastener. The diameter of the first chamfered portion gradually increases in the direction away from the first end of the inner fastener. The second end of the outer fastener has a second chamfered portion. The angle between the inner surface of the second chamfered portion and the axis of the outer fastener is greater than the angle between the inner surface of the second conical cylindrical portion and the axis of the outer fastener. The diameter of the second chamfered portion gradually increases in the direction away from the first end of the outer fastener. The inner surface of the second chamfered portion is attached to the outer surface of the first chamfered portion.

9. The snap-fit ​​connection structure according to claim 8, characterized in that, The diameter of the first conical cylinder gradually decreases in the direction away from the second end of the inner fastener, and the diameter of the second conical cylinder gradually decreases in the direction away from the second end of the outer fastener. The inner surface of the second conical cylinder is in contact with the outer surface of the first conical cylinder.

10. A transmission box, characterized in that, The transmission box includes the snap-fit ​​connection structure as described in any one of claims 1 to 9.

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