DC terminal capable of bearing large torque
By designing the barrier and slot structure of conductive terminals and plastics on the DC terminals, and using O-type sealing rings, the problems of poor sealing and low thermal shock performance of traditional DC terminals are solved, and good sealing and high thermal shock resistance are achieved in high torque and high temperature environments.
Patent Information
- Application Number
- CN202421186515.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-27
AI Technical Summary
Traditional DC terminals have poor sealing properties under high torque conditions and have low thermal shock performance, making it difficult to meet application needs in high load and high temperature environments.
A DC terminal including a conductive terminal and an integrated plastic body is designed, with a barrier on the conductive terminal and a slot is provided on the outer wall of the conductive terminal to enhance sealing. In addition, an O-ring is used as the first and second seals to ensure good sealing under high torque conditions and improve thermal shock resistance.
It achieves good sealing of DC terminals when withstanding large torques, and significantly improves thermal shock resistance, meeting application needs in high load and high temperature environments.
Smart Images
Figure CN222673381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wiring terminals, and more specifically to a DC terminal capable of bearing large torque. Background Art
[0002] With the continuous advancement of electronic technology, DC / DC systems (DC to DC conversion systems) are increasingly used in power electronics, industrial control, new energy and other fields. In DC / DC systems, DC terminals are key components for realizing low-voltage and high-current input and output functions, and their performance stability and reliability have a vital impact on the overall performance of the system. However, the DC terminal products currently used in DC / DC systems on the market have some significant technical defects and deficiencies.
[0003] First, in the actual use of traditional DC terminals, due to the differences in material properties between plastic and metal, as well as the limitations of the manufacturing process, it is often difficult to achieve an ideal sealing effect at the connection between the plastic parts and the metal terminals, which can easily lead to the intrusion of moisture, gas, etc., and then cause corrosion, oxidation and other problems, seriously affecting the service life and performance stability of the terminals.
[0004] Secondly, the maximum torque of most DC terminals on the market can only reach 25N.m, which to a certain extent limits its application in high-load and high-demand application scenarios. At the same time, the thermal shock performance of traditional DC terminals is relatively low, usually only meeting the requirements of 300 cycles, which is difficult to meet the use requirements in some high-temperature and frequent thermal shock environments. Utility Model Content
[0005] In order to overcome the deficiencies of the prior art, the utility model provides a DC terminal capable of withstanding large torque, so as to solve the problem that the traditional DC terminal has poor sealing performance under the condition of withstanding large torque.
[0006] The technical solution of the utility model is as follows: A DC terminal capable of withstanding large torque comprises: a conductive terminal and a plastic body integrally formed on the conductive terminal, a stopper is sleeved on the conductive terminal, and the stopper is located between the conductive terminal and the plastic body, a slot is arranged on the outer wall of the conductive terminal, the stopper is provided with an undercut protruding into the slot, and the undercut abuts against the inner wall of the slot.
[0007] Furthermore, it also includes a first seal and a second seal, the plastic body includes a base and a boss that is an integral structure with the base, the boss is provided with an annular groove, the first seal is arranged in the annular groove of the plastic body, the second seal is sleeved on the conductive terminal, and the second seal is located in the gap between the conductive terminal and the plastic body.
[0008] Furthermore, the blocking portion includes a main body and a convex body formed by the main body extending radially outward, the convex body abuts against the plastic body, and the main body extends into the gap between the conductive terminal and the plastic body and abuts against the surface of the second sealing member.
[0009] Furthermore, the undercut and the stopper are an integrated structure.
[0010] Furthermore, a first threaded hole arranged along the X-axis direction and a second threaded hole arranged along the Y-axis direction are provided inside the conductive terminal, and both the first threaded hole and the second threaded hole are M8 threaded holes.
[0011] Furthermore, a metal plating layer is provided on the surface of the conductive terminal, inside the first threaded hole and inside the second threaded hole.
[0012] Furthermore, a plurality of anti-rotation planes are provided on the conductive terminal, and the plurality of anti-rotation planes are sequentially arranged around the central axis of the conductive terminal.
[0013] Furthermore, an anti-rotation groove is provided in each of the anti-rotation planes, and at least a portion of the plastic body extends into the anti-rotation groove.
[0014] Furthermore, the first sealing member and the second sealing member are both O-rings.
[0015] Furthermore, the compression amount of the first sealing member and the compression amount of the second sealing member are 15% to 30%.
[0016] The utility model according to the above scheme has the beneficial effect that: the utility model provides a DC terminal capable of withstanding large torque, including a conductive terminal and a plastic body integrally formed on the conductive terminal, a stopper is sleeved on the conductive terminal, and the stopper is located between the conductive terminal and the plastic body, and a slot is provided on the outer wall of the conductive terminal so that the undercut of the stopper can protrude into the slot and abut against the inner wall of the slot. This design not only enhances the sealing performance between the conductive terminal and the plastic body, and enables the DC terminal to maintain good sealing even when subjected to large torque, but also effectively enhances the connection strength between the stopper and the conductive terminal, and even when subjected to large torque or external force, the stopper is not easily pushed out, thereby ensuring the overall structural stability of the DC terminal and having good sealing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 This is a schematic diagram of the end face of a DC terminal capable of withstanding large torque in an embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a DC terminal capable of withstanding large torque in an embodiment of the utility model;
[0020] Figure 3 This is one of the cross-sectional views of a DC terminal capable of withstanding large torque in an embodiment of the utility model;
[0021] Figure 4 for Figure 3 A local enlarged schematic diagram;
[0022] Figure 5 This is a second cross-sectional view of a DC terminal capable of withstanding large torque in an embodiment of the utility model;
[0023] Figure 6 It is a schematic diagram of the structure of the conductive terminal in the embodiment of the utility model.
[0024] In the figure, 1, conductive terminal; 11, first threaded hole; 12, second threaded hole; 13, anti-rotation plane; 14, anti-rotation groove; 2, plastic body; 21, base; 22, boss; 221, annular groove; 3, stopper; 31, body; 32, convex body; 4, undercut; 5, first sealing member; 6, second sealing member, a, first leakage channel; b, second leakage channel. DETAILED DESCRIPTION
[0025] The following detailed description and drawings of the embodiments of the present invention are used to illustrate the principle of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the embodiments described.
[0026] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments:
[0027] In conventional DC terminals, the connection between the blocking portion 3 and the conductive terminal 1 is often achieved by simple sleeve connection or bonding, and this connection method is prone to failure when facing external force impact.
[0028] Based on this, the present invention provides a DC terminal capable of withstanding large torque, see Figure 1-2 As shown, the DC terminal includes a conductive terminal 1 and a plastic body 2 integrally formed on the conductive terminal 1 .
[0029] See also Figure 3-4 As shown, a stopper 3 is sleeved on the conductive terminal 1 in this embodiment, and the stopper 3 is located between the conductive terminal 1 and the plastic body 2. A slot is provided on the outer wall of the conductive terminal 1, so that the undercut 4 of the stopper 3 can protrude into the slot and abut against the inner wall of the slot. This design not only enhances the sealing performance between the conductive terminal 1 and the plastic body 2, and enables the DC terminal to maintain good sealing even when subjected to large torque, but also effectively enhances the connection strength between the stopper 3 and the conductive terminal 1. Even when subjected to large torque or external force, the stopper 3 is not easily pushed out, thereby ensuring the overall structural stability of the DC terminal and having good sealing.
[0030] See also Figure 5 As shown, the gap between the plastic body 2 and the mounting seat forms a first leakage channel a, and the gap between the plastic body 2 and the conductive terminal 1 forms a second leakage channel b. In order to prevent air leakage, the DC terminal capable of withstanding large torque provided by the embodiment of the utility model further includes a first seal 5 and a second seal 6. The plastic body 2 includes a base 21 and a boss 22 which is an integral structure with the base 21. The boss 22 is provided with an annular groove 221. The first seal 5 is arranged in the annular groove 221. The second seal 6 is sleeved on the conductive terminal 1, and the second seal 6 is located in the gap between the conductive terminal 1 and the plastic body 2. With this design, the first seal 5 can seal the first leakage channel a, and the second seal 6 can seal the second leakage channel b, thereby achieving a double sealing effect, effectively preventing liquids, gases, etc. from flowing between the cavity and the outside of the cavity.
[0031] Specifically, if the compression amount of the first seal 5 and the second seal 6 is too small, the contact pressure between the first seal 5, the second seal 6 and the sealing surface will be insufficient, and the sealing gap cannot be completely filled, thereby reducing the sealing effect. If the compression amount of the first seal 5 and the second seal 6 is too large, it is easy to cause excessive deformation or even damage of the first seal 5 and the second seal 6, thereby shortening the service life of the first seal 5 and the second seal 6. Based on this, in this embodiment, the first seal 5 and the second seal 6 are both O-rings, and the compression amount of the first seal 5 and the compression amount of the second seal 6 are 15% to 30%. Specifically, the compression amount of the first seal 5 and the compression amount of the second seal 6 are within the range of 15% to 30%, which can ensure that there is sufficient contact pressure between the first seal 5, the second seal 6 and the sealing surface to form an effective seal.
[0032] In this embodiment, the filling rate of the annular groove of the first seal 5 is 80% to 100%, the first seal 5 and the second seal 6 have high temperature resistance, and can stably work at a high temperature of 125°C for up to 1008 hours. Due to such performance, it is possible to ensure that the first seal 5 and the second seal 6 maintain stable performance for a long time, reduce the frequency of replacement due to seal failure, reduce the maintenance cost of the equipment, and reduce production losses caused by shutdown maintenance.
[0033] It is worth mentioning that the first seal 5 and the second seal 6 are not limited to the O-ring defined in this embodiment, and can also be a star-shaped seal or a Gly ring. Of course, those skilled in the art can also select other seals capable of achieving bidirectional sealing in the prior art according to actual production needs.
[0034] Preferably, the stopper 3 includes a main body 31 and a convex body 32 formed by the main body 31 extending radially outward, the convex body 32 abuts against the plastic body 2, and the main body 31 extends into the gap between the conductive terminal 1 and the plastic body 2 and abuts against the surface of the second seal 6. With this design, when the stopper 3 is installed in place, the convex body 32 abuts against the plastic body 2, thereby preventing the stopper 3 from being pushed over the boundary. Secondly, when the convex body 32 abuts against the plastic body 2, the main body 31 extends into the gap between the conductive terminal 1 and the plastic body 2 and abuts against the surface of the second seal 6, thereby limiting the second seal 6 and effectively preventing the second seal 6 from shifting when subjected to external pressure, thereby ensuring the stability of the sealing effect.
[0035] Preferably, the undercut 4 and the stopper 3 are an integral structure. Such a design not only ensures the stability of the connection between the undercut 4 and the stopper 3, but also greatly simplifies the manufacturing and assembly process, effectively reduces the risk of loosening or breaking at the connection between the undercut 4 and the stopper 3, thereby improving the stability and reliability of the overall structure of the DC terminal. In addition, since no additional connection is required, the production cost is significantly reduced and the production efficiency is improved.
[0036] Preferably, the conductive terminal 1 is provided with a first threaded hole 11 arranged along the X-axis direction and a second threaded hole 12 arranged along the Y-axis direction, and both the first threaded hole 11 and the second threaded hole 12 are M8 threaded holes. In this embodiment, the X-axis direction and the Y-axis direction are perpendicular to each other, and the X-axis direction is parallel to the central axis of the conductive terminal 1.
[0037] In this embodiment, a metal coating is provided on the surface of the conductive terminal 1, in the first threaded hole 11, and in the second threaded hole 12. Preferably, the metal coating is a nickel coating. The metal coating is provided so that a passivation film is formed on the surface of the conductive terminal 1, in the first threaded hole 11, and in the second threaded hole 12, which effectively resists corrosion from the atmosphere, alkali, and acid. Secondly, in this embodiment, during the locking process, the metal coating can remain intact without falling off or cracking.
[0038] See also Figure 6 As shown, a plurality of anti-rotation planes 13 are arranged on the conductive terminal 1, and the plurality of anti-rotation planes 13 are arranged in sequence around the central axis of the conductive terminal 1, and an anti-rotation groove 14 is arranged in each anti-rotation plane 13, and at least a part of the plastic body 2 extends into the anti-rotation groove 14. With this design, the entire DC terminal can withstand a larger torque without loosening, and can withstand a torque of more than 30N.m. Secondly, in the case of alternating high and low temperature environments, the material may deform or stress concentrate due to thermal expansion and contraction. It is precisely by adopting such a structural design that the connection between the conductive terminal 1 and the plastic body 2 in the utility model is stable, and the stress caused by thermal shock can be significantly reduced, thereby improving the thermal shock resistance of the entire DC terminal, and then being able to meet the thermal shock requirements of up to 1000 times.
[0039] The indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when used, or the orientation or position relationship commonly understood by technical personnel in this field, or the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application 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 application.
[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.
[0041] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A DC terminal capable of withstanding large torque, characterized in that: include: A conductive terminal (1) and a plastic body (2) integrally formed on the conductive terminal (1); a stopper (3) is sleeved on the conductive terminal (1), and the stopper (3) is located between the conductive terminal (1) and the plastic body (2); a slot is provided on the outer wall of the conductive terminal (1); the stopper (3) is provided with an undercut (4) protruding into the slot, and the undercut (4) abuts against the inner wall of the slot.
2. A DC terminal capable of withstanding large torque as claimed in claim 1, characterized in that: The plastic body (2) further comprises a first sealing member (5) and a second sealing member (6); the plastic body (2) comprises a base (21) and a boss (22) which is an integral structure with the base (21); an annular groove (221) is provided on the boss (22); the first sealing member (5) is arranged in the annular groove (221); the second sealing member (6) is sleeved on the conductive terminal (1), and the second sealing member (6) is located in the gap between the conductive terminal (1) and the plastic body (2).
3. A DC terminal capable of withstanding large torque as claimed in claim 2, characterized in that: The blocking portion (3) comprises a main body (31) and a convex body (32) formed by extending and protruding radially outward from the main body (31), the convex body (32) and the plastic body (2) abut against each other, and the main body (31) extends into the gap between the conductive terminal (1) and the plastic body (2) and abuts against the surface of the second sealing member (6).
4. A DC terminal capable of withstanding large torque as claimed in claim 1, characterized in that: The undercut (4) and the stopper (3) are an integrated structure.
5. A DC terminal capable of withstanding large torque as claimed in claim 1, characterized in that: The conductive terminal (1) is provided with a first threaded hole (11) arranged along the X-axis direction and a second threaded hole (12) arranged along the Y-axis direction, and the first threaded hole (11) and the second threaded hole (12) are both M8 threaded holes.
6. A DC terminal capable of withstanding large torque as claimed in claim 5, characterized in that: The surface of the conductive terminal (1), the inside of the first threaded hole (11) and the inside of the second threaded hole (12) are all provided with a metal plating layer.
7. A DC terminal capable of withstanding large torque as claimed in claim 1, characterized in that: A plurality of anti-rotation planes (13) are provided on the conductive terminal (1), and the plurality of anti-rotation planes (13) are arranged in sequence around the central axis of the conductive terminal (1).
8. A DC terminal capable of withstanding large torque as claimed in claim 7, characterized in that: An anti-rotation groove (14) is provided in each anti-rotation plane (13), and at least a portion of the plastic body (2) extends into the anti-rotation groove (14).
9. A DC terminal capable of withstanding large torque as claimed in claim 2, characterized in that: The first sealing member (5) and the second sealing member (6) are both O-rings.
10. A DC terminal capable of withstanding large torque as claimed in claim 9, characterized in that: The compression amount of the first sealing member (5) and the compression amount of the second sealing member (6) are 15% to 30%.