Electric energy transmission mechanism with anti-loosening structure and charging seat
By setting fastening members and anti-loosening members between the terminals and the conductive rows of the charging base of the new energy vehicle, the connection is fixed by using internal threads and screws, and the stop and warping sections are used to prevent loosening, the connection caused by thermal expansion is solved. The loosening problem ensures the reliability and safety of power transmission.
Patent Information
- Application Number
- CN202420012950.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-03
AI Technical Summary
The terminals of the charging base of the existing new energy vehicle are connected to the aluminum strip or aluminum rod conductor. Due to the different thermal expansion coefficients, the bolts at the connection are prone to loosening and poor contact, which may cause excessive temperature rise and risk of spontaneous combustion.
An electric energy transmission mechanism with an anti-loosening structure is designed, by providing a fastening member and an anti-loosening member between the terminal and the conductive row, a fixed connection is used to use internal threads and screws, and preventing it from being prevented by multiple stops and warping sections. The fastener rotates to ensure the reliability of contact.
It effectively prevents poor contact and excessive temperature rise caused by loosening, ensures the stability and safety of the electric energy transmission structure, and avoids the risk of spontaneous combustion.
Smart Images
Figure CN222355444U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electric energy transmission, and more specifically, to an electric energy transmission mechanism and a charging stand with an anti-loosening structure. Background Art
[0002] The common connection forms between terminals and cables in existing new energy vehicle charging stations are welding, crimping, and screwing. Due to the multi-directional lightweight development trend of new energy vehicles, the new power transmission medium has been changed from copper wire to aluminum busbars, aluminum rod conductors, etc. The connection between terminals and aluminum rods or aluminum busbars is mostly a bolted connection structure. During the process of high current power flow, the conductor expands due to heat, and the temperature of the conductor without power decreases. Due to the different thermal expansion coefficients of copper and aluminum, thermal deformation is inconsistent. After multiple charging, the bolts at the connection are very easy to loosen. After loosening, the terminal and the aluminum busbar or aluminum rod have poor contact, resulting in excessive temperature rise and the risk of spontaneous combustion. Therefore, a new power transmission mechanism is needed to solve the above problems. Summary of the invention
[0003] The present application provides an electric energy transmission mechanism with an anti-loosening structure, comprising: a conductive bar, a terminal, a fastening member and an anti-loosening member, wherein a countersunk hole is arranged on the end surface of the fixed end of the terminal, a coaxial internal thread is arranged in the countersunk hole, a through hole is arranged on the conductive bar, the fastening member comprises a nail head having a diameter greater than the through hole and a screw connected to the nail head at one end, the anti-loosening member comprises an annular body, a first stopper arranged on the inner periphery of the annular body, and a second stopper arranged on the outer periphery of the annular body;
[0004] The screw rod passes through the through hole and the anti-loosening component and is threadedly connected with the internal thread, so that the first surface of the conductive bar is abutted and connected with the end surface of the fixed end of the terminal. The anti-loosening component is located in the countersunk hole, and the first stop portion is clamped with the external thread of the screw rod. The annular body and / or the second stop portion abuts against the first surface of the conductive bar to prevent the fastening component from rotating and withdrawing from the internal thread.
[0005] Optionally, the external thread on the screw rod at least partially extends into the through hole.
[0006] Optionally, there are multiple first stop portions, and each of the first stop portions extends obliquely from the inner periphery toward the center line of the annular body to form a sheet-like structure, and the extended end of the first stop portion is clamped in the thread groove on the screw.
[0007] Optionally, an inclination angle α of the sheet-shaped extension plane of the first stopping portion relative to a radial plane of the anti-loosening component is 1° to 10°.
[0008] Optionally, the second stop portion includes a vertical section axially extending from the outer periphery and a warped section bent from the vertical section and extending radially outward toward the annular body, and the warped section is used to abut against the first surface of the conductive bar.
[0009] Optionally, an angle β between a first plane where the vertical section is located and a second plane where the warped section is located is 90° to 135°.
[0010] Optionally, a plurality of the first stop portions and a plurality of the second stop portions are staggeredly arranged along the circumference of the annular body, or a plurality of the first stop portions and a plurality of the second stop portions are spaced apart along the circumference of the annular body.
[0011] Optionally, the annular body has an axially through opening, and two radially outward flanges are arranged opposite to each other at the opening. The side wall of the fixed end is provided with a through opening that passes through the countersunk hole, and the inner diameter of the through opening is larger than the distance between the two flanges.
[0012] Optionally, a limiting rod is radially provided outwardly at a position of the outer circumference of the annular body opposite to the flange, and a limiting groove is provided at the inner circumference of the counterbore, and the limiting rod is inserted into the limiting groove so that the opening is arranged corresponding to the through port.
[0013] The present application also provides a charging stand, which includes the above-mentioned power transmission mechanism with an anti-loosening structure.
[0014] The present application provides a fastening component and an anti-loosening component between the terminal and the conductive bar, connects the terminal to the conductive bar with bolts, fixes the terminal to the conductive bar through the internal thread of the terminal and the screw on the fastener, and uses the anti-loosening component to further prevent the fastener from withdrawing from the terminal, thereby ensuring the reliability of contact between the various components of the power transmission structure and avoiding a series of problems caused by looseness.
[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 An exploded view of the electric energy transmission mechanism with an anti-loosening structure of the present application;
[0018] Figure 2 This is an enlarged view of the terminal fixing end of the electric energy transmission mechanism with an anti-loosening structure of the present application;
[0019] Figure 3 This is a cross-sectional view of the assembled power transmission mechanism with an anti-loosening structure of the present application;
[0020] Figure 4 A schematic diagram of the combination of the fastener, anti-loosening component and terminal of the present application;
[0021] Figure 5 A schematic diagram of the combination of the fastener and the anti-loosening component of the present application;
[0022] Figure 6 It is a schematic diagram of the anti-loosening component in this application;
[0023] Figure 7 for Figure 6 Schematic diagram of the AA direction.
[0024] The following are marked in the figure:
[0025] 1. Conductive bar; 11. Through hole; 2. Terminal; 21. Fixed end; 22. Countersunk hole; 221. Limiting groove; 23. Internal thread; 24. Through hole; 3. Fastener; 31. Screw; 32. Nail head; 4. Anti-loosening member; 41. Ring body; 42. First stop part; 43. Second stop part; 44. Flanging; 45. Limiting rod. DETAILED DESCRIPTION
[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.
[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.
[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.
[0029] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0031] The present application provides an electric energy transmission mechanism with an anti-loosening structure, such as Figure 1-Figure 7 As shown, it includes: a conductive bar 1, a terminal 2, a fastening member and an anti-loosening member 4, a countersunk hole 22 is provided on the end surface of the fixed end 21 of the terminal 2, and a coaxial internal thread 23 is provided in the countersunk hole 22, and a through hole 11 is provided on the conductive bar 1, and the fastening member includes a nail head 32 with a diameter larger than the through hole 11 and a screw 31 connected to the nail head 32 at one end, and the anti-loosening member 4 has an annular body 41, a first stopper 42 arranged on the inner periphery of the annular body 41, and a second stopper 43 arranged on the outer periphery of the annular body 41;
[0032] The screw 31 passes through the through hole 11 and the anti-loosening member 4, and is threadedly connected with the internal thread 23, so that the first surface of the conductive bar 1 is abutted and connected with the end surface of the fixed end 21 of the terminal 2, the anti-loosening member 4 is located in the countersunk hole 22, the first stop portion 42 is clamped with the external thread of the screw 31, and the annular body 41 and / or the second stop portion 43 abuts against the first surface of the conductive bar 1 to prevent the fastening member from rotating and withdrawing from the internal thread 23.
[0033] The existing connection structure between the terminal 2 and the conductor is a bolt connection. During the process of large current conduction, the conductor expands due to heat, and the temperature of the conductor decreases when it is not energized. Due to the different thermal expansion coefficients of different materials, the thermal deformation is inconsistent. After multiple charging, the bolts at the connection are very easy to loosen. After loosening, the terminal 2 and the conductor are in poor contact, which causes excessive temperature rise and easy spontaneous combustion. The power transmission mechanism with an anti-loosening structure of the present application is provided with a fastening member and an anti-loosening member 4 between the terminal 2 and the conductive bar 1, and the terminal 2 is bolted to the conductive bar 1. The terminal 2 and the conductive bar 1 are fixed by the internal thread 23 of the terminal 2 and the screw 31 on the fastener 3, and the anti-loosening member 4 is used to further prevent the fastener 3 from withdrawing from the terminal 2, thereby ensuring the reliability of the contact between the various components of the power transmission structure and avoiding a series of problems caused by looseness.
[0034] In the present application, the terminal 2 and the conductive bar 1 are conductors with different expansion coefficients. Generally, the terminal 2 is made of copper and the conductive bar 1 is an aluminum bar. The aluminum bar is a long aluminum product with a rectangular cross-section and made of aluminum and aluminum alloy as raw materials. It is sometimes also called a busbar. It is a high-current conductive product that plays the role of transmitting current and electrical connection in the circuit.
[0035] In some embodiments, the external thread on the screw rod 31 at least partially extends into the through hole 11. The external thread on the screw rod 31 is fully matched with the internal thread 23 inside the counterbore 22 to ensure the stability of the screw rod 31 and the counterbore 22.
[0036] Optionally, there are a plurality of first stoppers 42, and each of the first stoppers 42 extends obliquely from the inner periphery toward the center line of the annular body 41 to form a sheet-like structure, and the extended end of the first stopper 42 is clamped in the thread groove on the screw rod 31. Figure 7 As shown, a plurality of first stop portions 42 are respectively extended obliquely from the inner periphery toward the center line of the annular body 41 to form a sheet-like structure. When the terminal 2 and the conductive bar 1 are installed, the extended ends of the first stop portions 42 are clamped in the thread groove on the screw rod 31, and the screw rod 31 will not rotate along the thread groove, thereby preventing the fastening member from withdrawing from the terminal 2.
[0037] Optionally, the inclination angle α of the sheet-shaped extension plane of the first stopper 42 relative to the radial plane of the anti-loosening member 4 is 1° to 10°. Figure 7 As shown, if the inclination angle α is too small, the fit between the extended end of the first stop portion 42 and the thread groove on the screw rod 31 is unstable, and the screw rod 31 is easily disengaged when the vehicle vibrates greatly; at the same time, if the inclination angle α is too large, the diameter of the ring formed by the extended ends of the multiple first stop portions 42 is small, which may cause difficulty in installing the screw rod 31. Therefore, selecting a suitable inclination angle α can not only ensure that the screw rod 31 is easy to install, but also effectively realize the anti-loosening function.
[0038] Optionally, the second stopper 43 includes a vertical section extending axially from the outer periphery and a warped section bent from the vertical section and extending radially outward toward the annular body 41, and the warped section is used to abut the first surface of the conductive bar 1. When the conductive bar 1 and the terminal 2 are installed, the fastener 3 may be vibrated to cause the screw 31 to come out of the internal thread 23. At this time, the warped section of the second stopper 43 abuts against the first surface of the conductive bar 1, and the extended end of the first stopper 42 is clamped with the thread groove on the screw 31, which limits the rotation of the screw 31 in the terminal 2, prevents the fastener 3 from withdrawing from the terminal 2, ensures the stability of the connection between the conductive bar 1 and the terminal 2, ensures the electrical performance of the power transmission mechanism, and prevents a series of problems caused by the loosening of the conductive bar 1 and the terminal 2.
[0039] Optionally, the angle β between the first plane where the vertical section is located and the second plane where the warped section is located is 90° to 135°. Figure 7 As shown, if the angle β is too small, the extended end of the warped section may abut against the inner wall of the countersunk hole 22. When the screw 31 is relatively short, it may not be able to extend into the countersunk hole 22 and be installed in conjunction with the internal thread in the countersunk hole 22. If the angle β is too large, when the screw 31 is installed to the fixed end 21, the extended end of the warped section of the second stop portion 43 may extend to the outside of the countersunk hole 22, resulting in a smaller contact area between the conductive bar 1 and the terminal 2, affecting the electrical performance of the electrical connection structure.
[0040] Optionally, a plurality of the first stoppers 42 and a plurality of the second stoppers 43 are staggeredly arranged along the circumference of the annular body 41, or a plurality of the first stoppers 42 and a plurality of the second stoppers 43 are spaced apart along the circumference of the annular body 41. Figure 6 and Figure 7 As shown, a plurality of the first stop portions 42 and a plurality of the second stop portions 43 are arranged at intervals or staggered in the circumference of the annular body 41 , which can ensure that the first stop portions 42 and the second stop portions 43 are subjected to uniform force.
[0041] Optionally, the annular body 41 has an axially through opening, and two radially outward flanges 44 are arranged opposite to each other at the opening, and a through opening 24 penetrating the counterbore 22 is formed on the side wall of the fixed end 21, and the inner diameter of the through opening 24 is larger than the distance between the two flanges 44. Figure 6 As shown, the opening provided on the annular body 41 allows the annular body 41 to be elastically deformed, which is suitable for passing through a screw 31 with a larger diameter. At the same time, the annular body 41 can be directly sleeved on the required position on the screw 31 from the opening, and there is no need for the screw 31 to pass through several components before being installed on the annular body 41, thereby improving the convenience of installing the anti-loosening component 4; two radially outward flanges 44 are relatively arranged at the opening, and at the same time, a through opening 24 that passes through the countersunk hole 22 is opened on the side wall of the fixed end 21, and the two flanges 44 are clamped with the through opening 24, and the flanges 44 on the anti-loosening component 4 are clamped with the through opening 24 on the side wall of the fixed end 21, so as to prevent the anti-loosening component 4 from rotating inside the terminal 2, thereby improving the stability of the connection between the conductive bar 1 and the terminal 2.
[0042] Furthermore, a limit rod 45 is radially provided outwardly at a position on the outer periphery of the annular body 41 opposite to the flange 44, and a limit groove 221 is provided on the inner periphery of the countersunk hole 22. The limit rod 45 is inserted into the limit groove 221 so that the opening is arranged corresponding to the through hole 24. The limit rod 45 cooperates with the limit groove 221 to further prevent the anti-loosening component 4 from rotating inside the terminal 2.
[0043] The present application also provides a charging stand, which includes the above-mentioned power transmission mechanism with an anti-loosening structure.
[0044] The above exemplary embodiments are described with reference to the accompanying drawings, and many different forms and embodiments are feasible without departing from the spirit and teachings of the present invention. Therefore, the present invention should not be constructed as a limitation of the exemplary embodiments proposed herein. More specifically, these exemplary embodiments are provided so that the present invention will be perfect and complete, and the scope of the present invention will be conveyed to those who are familiar with the technology. In these figures, the component sizes and relative sizes may be exaggerated for clarity. The terms used here are only based on the purpose of describing specific exemplary embodiments and are not intended to be limiting. As used herein, unless the text clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to include these multiple forms. It will be further understood that the terms "including" and / or "comprising" when used in this specification indicate the presence of the features, integers, steps, operations, components and / or components, but do not exclude the presence or increase of one or more other features, integers, steps, operations, components, components and / or their groups. Unless otherwise indicated, when stated, a value range includes the upper and lower limits of the range and any sub-ranges therebetween. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. An electric energy transmission mechanism with an anti-loosening structure, characterized in that: include: A conductive bar, a terminal, a fastening member and an anti-loosening member, wherein a countersunk hole is provided on the end surface of the fixed end of the terminal, a coaxial internal thread is provided in the countersunk hole, a through hole is provided on the conductive bar, the fastening member comprises a nail head having a diameter greater than the through hole and a screw connected to the nail head at one end, and the anti-loosening member comprises an annular body, a first stopper provided on the inner periphery of the annular body, and a second stopper provided on the outer periphery of the annular body; The screw rod passes through the through hole and the anti-loosening component and is threadedly connected with the internal thread, so that the first surface of the conductive bar is abutted and connected with the end surface of the fixed end of the terminal. The anti-loosening component is located in the countersunk hole, and the first stop portion is clamped with the external thread of the screw rod. The annular body and / or the second stop portion abuts against the first surface of the conductive bar to prevent the fastening component from rotating and withdrawing from the internal thread.
2. The electric energy transmission mechanism with anti-loosening structure according to claim 1, characterized in that: The external thread on the screw rod at least partially extends into the through hole.
3. The electric energy transmission mechanism with anti-loosening structure according to claim 1, characterized in that: There are a plurality of first stop portions, and each of the first stop portions extends obliquely from the inner periphery toward the center line of the annular body to form a sheet-like structure, and an extended end of the first stop portion is clamped in the thread groove on the screw rod.
4. The electric energy transmission mechanism with anti-loosening structure according to claim 3, characterized in that: An inclination angle α of the plate-shaped extending plane of the first stopper relative to the radial plane of the anti-loosening member is 1° to 10°.
5. The electric energy transmission mechanism with anti-loosening structure according to claim 1, characterized in that: The second stop portion includes a vertical section axially extending from the outer periphery and a warped section bent from the vertical section and extending radially outward toward the annular body, wherein the warped section is used to abut against the first surface of the conductive bar.
6. The electric energy transmission mechanism with anti-loosening structure according to claim 5, characterized in that: An included angle β between a first plane where the vertical section is located and a second plane where the warped section is located is 90° to 135°.
7. The electric energy transmission mechanism with anti-loosening structure according to claim 1, characterized in that: A plurality of the first stoppers and a plurality of the second stoppers are staggeredly arranged along the circumference of the annular body, or a plurality of the first stoppers and a plurality of the second stoppers are spaced apart along the circumference of the annular body.
8. The electric energy transmission mechanism with anti-loosening structure according to claim 1, characterized in that: The annular body has an axially through opening, and two radially outward flanges are arranged opposite to each other at the opening. The side wall of the fixed end is provided with a through opening that passes through the countersunk hole, and the inner diameter of the through opening is larger than the distance between the two flanges.
9. The electric energy transmission mechanism with anti-loosening structure according to claim 8, characterized in that: A limiting rod is radially provided outwardly at a position of the outer circumference of the annular body opposite to the flange, and a limiting groove is provided on the inner circumference of the counterbore. The limiting rod is inserted into the limiting groove so that the opening is arranged corresponding to the through port.
10. A charging stand, characterized in that: The charging base comprises an electric energy transmission mechanism with an anti-loosening structure according to any one of claims 1 to 9.