High-current-carrying crown spring

Abstract

The utility model discloses a high current-carrying crown spring which comprises a first end portion, a second end portion and ribs, the first end portion and the second end portion are both of an annular structure, the two ends of each rib are connected to the first end portion and the second end portion respectively, the multiple ribs are arranged and distributed at intervals, each rib comprises a first connecting portion, a middle portion and a second connecting portion, and the first connecting portion is connected with the middle portion. The middle of the middle portion protrudes outwards, one end of the first connecting portion is connected to the first end, the other end of the first connecting portion is connected with one end of the middle portion, one end of the second connecting portion is connected to the second end, the other end of the second connecting portion is connected with the other end of the middle portion, and the joint of the first connecting portion and the middle portion is in smooth transition and protrudes inwards. Forming a first contact part; and the joint of the second connecting part and the middle part is also in smooth transition and protrudes inwards to form a second contact part. According to the utility model, the contact area with the insertion cylinder or the insertion core is increased, the overall strength is higher, and the stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a high-current-carrying crown spring. Background Art

[0002] The high-voltage connectors for energy storage and new energy vehicles are the power transmission nerves of the vehicle wiring harness, and the connector terminals play an important role. Existing terminals cannot meet the design requirements of small size and large current. Currently, the conventional crown spring seats on the market are cage-shaped structures, and the contact area with the socket when installed in the socket is small. The contact ribs are straight or segmented in the middle of the straight bar. This kind of rib has a large contact resistance and a high overall temperature rise. In order to meet the requirements of large-current charging and reduce the contact resistance, there is an urgent need for a high-current-carrying crown spring with a large contact area and a small contact resistance with the pin and socket. Content of the Utility Model

[0003] The purpose of the utility model is to design a high-current-carrying crown spring to solve the above-mentioned technical deficiencies.

[0004] The utility model designs a high-current-carrying crown spring, which includes a first end, a second end and ribs. Both the first end and the second end are annular structures. The two ends of the rib are respectively connected to the first end and the second end. A plurality of the ribs are arranged at intervals. The rib includes a first connecting portion, a middle portion and a second connecting portion. The middle portion is convex outward in the middle. One end of the first connecting portion is connected to the first end, and the other end is connected to one end of the middle portion. One end of the second connecting portion is connected to the second end, and the other end is connected to the other end of the middle portion. The connection between the first connecting portion and the middle portion is smoothly transitioned and convex inward to form a first contact portion; the connection between the second connecting portion and the middle portion is also smoothly transitioned and convex inward to form a second contact portion.

[0005] Preferably, one end of the first end and the second end that is suspended is a suspended end, and the edge of the suspended end is a serrated edge. When the crown spring is inserted into the socket, the serrated edge contacts with the inner wall of the socket to form friction to prevent the crown spring from rotating relative to the socket. At the same time, the contact points between the serrated edge and the inner wall of the socket and the first contact portion and the second contact portion of the corresponding rib respectively form two contact paths.

[0006] Further optimized, the suspended ends of the first end and the second end are inclined outward, so that after the suspended ends are inserted into the socket, they form a tight fit with the socket to avoid detachment from the socket.

[0007] Preferably, the first connecting portion and the second connecting portion are symmetrically arranged with the middle portion as the center.

[0008] For further optimization, the connection between the first connecting part and the first end part bulges outwards to form a third contact part; the connection between the second connecting part and the second end part bulges outwards to form a fourth contact part.

[0009] Preferably, the bulge of the middle part is arc-shaped.

[0010] For further optimization, the connections between the first end part, the first connecting part, the middle part, the second connecting part and the second end part are all in smooth transition.

[0011] Preferably, there is a gap between two adjacent rib strips. The distance between two adjacent first connecting parts and near the first end part and the distance between two adjacent second connecting parts and near the second end part are used as the first distance, and the distance between two adjacent middle parts is used as the second distance. The first distance is greater than the second distance.

[0012] Preferably, the first end part, the second end part and the rib strips are of an integral design.

[0013] Preferably, the rib strips are obtained by stamping.

[0014] The technical effect of the present utility model is that the rib strips include an integral first connecting part, a middle part and a second connecting part. The connections of the three form contact parts, so that the crown spring forms multiple contact parts. The three form a smooth curve shape with undulations of convex and concave. It is not only an integral and coherent design with high structural strength, but also the multiple contact parts increase the contact area with the socket or the plug core, and the contact resistance is smaller. The two end ports of the crown spring, that is, the ports of the first end part and the second end part, are serrated and are respectively inclined outwards to form a flared shape, which can effectively prevent the crown spring from rotating in the socket. The multi-contact part design and the outer-expanded port design of the crown spring rib strips make the installation stability between the crown spring and the socket better, and it is not easy to be taken out when the plug core is inserted and removed. Description of the Drawings

[0015] Figure 1 is the overall structure diagram of the crown spring;

[0016] Figure 2 is another perspective view of the overall structure of the crown spring;

[0017] Figure 3 is the overall structure diagram of the crown spring with another serrated end;

[0018] Figure 4 is the partial structure diagram of the crown spring.

[0019] In the figure: 1. First end; 2. Second end; 3. Suspended end; 4. Rib; 41. First connecting part; 42. Middle part; 43. Second connecting part; 45. First contact part; 46. Second contact part; 47. Third contact part; 48. Fourth contact part; 5. First spacing; 6. Second spacing; 7. Notch. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0021] Embodiment 1

[0022] The present invention includes a first end 1, a second end 2 and a rib 4. Both the first end 1 and the second end 2 are annular flat strip structures. The two ends of the rib 4 are respectively connected to the first end 1 and the second end 2. A plurality of ribs 4 are arranged at intervals. In this embodiment, the rib 4 is a flat strip structure. The rib 4 includes a first connecting part 41, a middle part 42 and a second connecting part 43. The first connecting part 41, the middle part 42 and the second connecting part 43 are integrally designed. The middle part 42 of the rib 4 is convex outward in the middle, and the convex part is arc-shaped. One end of the first connecting part 41 is connected to the first end 1, and the other end is connected to one end of the middle part 42; one end of the second connecting part 43 is connected to the second end 2, and the other end is connected to the other end of the middle part 42. The connection part between the first connecting part 41 and the middle part 42 is smoothly transitioned and convex inward to form a first contact part 45; the connection part between the second connecting part 43 and the middle part 42 is also smoothly transitioned and convex inward to form a second contact part 46, and the first connecting part 41 and the second connecting part 43 are symmetrically arranged with the middle part 42 as the center, so that the longitudinal section of the rib 4 is two S-shaped bodies connected up and down. The advantage of such a design is that multiple contact parts are formed, that is, multiple-point contacts are formed on both the outer peripheral wall and the inner peripheral wall of the entire crown spring, reducing the contact impedance during the installation of the crown spring, and at the same time having a larger contact area.

[0023] Furthermore, the connection part between the first connecting part 41 and the first end 1 is convex outward to form a third contact part 47; the connection part between the second connecting part 43 and the second end 2 is convex outward to form a fourth contact part 48, that is, multiple-point contacts are formed on both the outer peripheral wall and the inner peripheral wall of the entire crown spring. The contact parts on each rib 4 are symmetric with the center line of the middle part 42, so that the shape of the crown spring is uniform and symmetric, and it can be installed from any end, that is, reverse installation is realized.

[0024] The connections among the first end 1, the first connecting portion 41, the middle portion 42, the second connecting portion 43 and the second end 2 are all smoothly transitioned to increase the contact area between the peripheral wall of the rib 4 and the inner wall of the insert tube, making the installation more firm and stable.

[0025] One end of the first end 1 and the second end 2 that is suspended serves as a suspended end 3, and the edge of the suspended end 3 is serrated, that is, the edge is provided with notches 7 that are spaced apart, that is, when the crown spring is inserted into the insert tube as a whole, the serrated edge contacts and forms friction with the inner wall of the insert tube, which provides a feed groove for the connecting die and effectively prevents the crown spring from rotating in the insert tube. At the same time, two symmetrical electrical contact paths are formed between the contact points between the serrated edge and the inner wall of the insert tube and the first contact portion 45 and the second contact portion 46 of the corresponding rib 4.

[0026] In this embodiment, the size of the notch 7 can be adjusted to form two different types of crown springs.

[0027] The suspended ends 3 of the first end 1 and the second end 2 are tilted outward, that is, the fracture ends of the crown spring are outwardly expanded, so that when the crown spring is inserted into the insertion tube, the suspended end 3 forms a tight fit with the inner wall of the insertion tube, preventing the crown spring from being separated from the insertion tube when the insert is pulled out, that is, strengthening the connection stability between the crown spring and the insertion tube.

[0028] In addition, the first end 1 and the second end 2 can be a closed annular structure or a non-closed annular structure. When a non-closed annular structure is adopted, the crown spring as a whole is a non-closed structure, so that the crown spring has a certain radial elastic deformation, which is convenient for insertion.

[0029] Embodiment 2

[0030] The basic content is the same as that of the first embodiment. A gap is left between two adjacent ribs 4. The distance between two adjacent first connecting parts 41 and close to the first end 1 and the distance between two adjacent second connecting parts 43 and close to the second end 2 are used as the first distance 5. The distance between two adjacent middle parts 42 is used as the second distance 6. The difference is that the first distance 5 is larger than the second distance 6, so that the gap between the middle parts 42 of the crown spring ribs 4 is smaller, that is, the width of the part between the ribs 4 is larger, so that the contact area between the contact part and the insert becomes larger, thereby increasing the flow cross-sectional area.

[0031] The first end 1, the second end 2 and the rib 4 are of integrated design. The rib 4 is of integrated design and is obtained by stamping to form a structure similar to a torsion spring to ensure the strength of the rib 4, thereby ensuring the overall strength of the crown spring.

[0032] The utility model is not limited to the above-mentioned optimal implementation mode. Any person can obtain other various forms of products under the inspiration of the utility model. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as this application, it falls within the protection scope of the utility model.

Claims

1. A high current carrying crown spring, characterized in that: The invention comprises a first end portion (1), a second end portion (2) and a rib (4), wherein the first end portion (1) and the second end portion (2) are both annular structures, the two ends of the rib (4) are respectively connected to the first end portion (1) and the second end portion (2), a plurality of the ribs (4) are arranged at intervals, the rib (4) comprises a first connecting portion (41), a middle portion (42) and a second connecting portion (43), the middle portion (42) is arranged to bulge outward in the middle, one end of the first connecting portion (41) is connected to the first end portion (1), and the other end is connected to one end of the middle portion (42), one end of the second connecting portion (43) is connected to the second end portion (2), and the other end is connected to the other end of the middle portion (42), the connection between the first connecting portion (41) and the middle portion (42) is a smooth transition and bulges inwards to form a first contact portion (45); the connection between the second connecting portion (43) and the middle portion (42) is also a smooth transition and bulges inwards to form a second contact portion (46).

2. A high current carrying crown spring according to claim 1, characterized in that: The suspended end of the first end (1) and the second end (2) is a suspended end (3), and the edge of the suspended end (3) is a serrated edge, so that when the crown spring is inserted into the insertion tube, the serrated edge contacts and forms friction with the inner wall of the insertion tube to prevent the crown spring from rotating relative to the insertion tube, and at the same time, the contact point between the serrated edge and the inner wall of the insertion tube and the first contact portion (45) and the second contact portion (46) of the corresponding rib (4) respectively form two contact paths.

3. A high current carrying crown spring according to claim 2, characterized in that: The suspended ends (3) of the first end (1) and the second end (2) are arranged to be inclined outwards, so that the suspended ends (3) are tightly fitted with the insertion tube after being inserted into the insertion tube, so as to avoid being separated from the insertion tube.

4. A high current carrying crown spring according to claim 1, characterized in that: The first connecting portion (41) and the second connecting portion (43) are symmetrically arranged with the middle portion (42) as the center.

5. A high current carrying crown spring according to claim 4, characterized in that: The connection between the first connection portion (41) and the first end portion (1) protrudes outward to form a third contact portion (47); and the connection between the second connection portion (43) and the second end portion (2) protrudes outward to form a fourth contact portion (48).

6. A high current carrying crown spring according to claim 1, characterized in that: The protrusion of the middle part (42) is in an arc shape.

7. A high current carrying crown spring according to claim 4, characterized in that: The connections between the first end portion (1), the first connecting portion (41), the middle portion (42), the second connecting portion (43) and the second end portion (2) are all smoothly transitioned.

8. The high current carrying crown spring according to claim 1, characterized in that: A spacing is left between two adjacent ribs (4), the spacing between two adjacent first connecting portions (41) and close to the first end portion (1) and the spacing between two adjacent second connecting portions (43) and close to the second end portion (2) serve as a first spacing (5), and the spacing between two adjacent middle portions (42) serve as a second spacing (6), and the first spacing (5) is greater than the second spacing (6).

9. A high current carrying crown spring according to claim 1, characterized in that: The first end portion (1), the second end portion (2) and the rib (4) are of an integrated design.

10. A high current carrying crown spring according to claim 1, characterized in that: The ribs (4) are obtained by stamping.

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