Novel large-current slot structure

Abstract

The utility model discloses a novel large-current slot structure. The novel large-current slot structure comprises a slot piece and a sheath, the slot piece comprises two bearing base bodies, the rear ends of the bearing base bodies are connected through reverse riveting, the front ends of the bearing base bodies are oppositely arranged at intervals, two sets of contact elastic teeth which are oppositely meshed in a staggered mode at equal intervals are arranged in forming holes in the front ends of the bearing base bodies, and the thickness of the contact elastic teeth formed in a thinning mode is smaller than that of the bearing base bodies. The contact elastic teeth of the two bearing base bodies are vertically symmetrical and form a slot; the sheath body of the sheath sleeves and is connected with the outer walls of the front ends of the two bearing base bodies in an interference wrapping mode, the protection elastic teeth of the sheath are attached to the outer walls of the contact elastic teeth, and the insertion pieces enter the insertion grooves along the insertion openings of the sheath and elastically make contact with the contact elastic teeth on the two sides. According to the utility model, the plugging and unplugging force peak shifting is smoother, the heat radiation is facilitated, the current-carrying capability is improved, the cracking problem is reduced, the electric contact positive pressure is stable, the manufacturing and assembling processes are simple, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of high-current electrical connection devices, in particular to a novel high-current slot structure. Background Art

[0002] The field of new energy vehicles is currently developing rapidly, and the development trend of its important component, high-current electrical connectors, is to improve current carrying capacity, reduce connector costs, and shorten supply cycles. The slot assembly is an important part of the high-current connector. At present, the slot assembly often uses die-stamped slot contact points to match the insert. When the current carrying capacity exceeds 250A, the thickness of the slot base material needs to be set to more than 1.2mm. The 1.2mm thick base material cannot be set with a structure with elastic contact function within a limited volume. Therefore, in order to achieve stable and reliable elastic contact between the slot assembly and the insert, a low-thickness elastic spring is added for transfer. Its drawbacks are: first, the elastic spring requires a corresponding fixing structure, such as welding, riveting, or crimping, resulting in a large number of parts, complicated manufacturing and assembly processes, and high costs. Second, the elastic spring transition structure also limits the improvement of current carrying capacity. Third, when the socket assembly is subsequently ultrasonically welded to the cable, the huge energy released by the ultrasonic equipment can easily damage the fixing points between the transition spring and the socket base. For example, the local riveting (or welding) of the spring and the socket body can easily cause cracking and stress concentration problems. Therefore, a new high-current socket structure is needed. Utility Model Content

[0003] In order to solve one or more of the above problems, the present invention provides a novel high-current slot structure.

[0004] According to one aspect of the present invention, the novel high-current slot structure includes: a slot member and a sheath;

[0005] The slot component includes two supporting bases connected by reverse rivets at the rear end and spaced apart at the front end. The front end of the supporting base is provided with a forming hole running through the upper and lower ends. Two sets of contact spring teeth with equal spacing and staggered engagement are provided in the forming hole. The thickness of the thin-molded contact spring teeth is less than that of the supporting base. The contact spring teeth of the two supporting bases are symmetrical up and down and form a slot.

[0006] The sheath includes a sheath body with a hollow interior and an open rear end. The upper and lower walls of the sheath body are provided with protective spring teeth with the same distribution as the contact spring teeth. A plug-in interface is provided on one side of the sheath body. The sheath body is inserted into and interference-covered to connect the front end outer walls of the two bearing bases. The protective spring teeth fit the outer walls of the contact spring teeth. The insert enters the slot along the plug-in interface and elastically contacts the contact spring teeth on both sides.

[0007] In some embodiments, the contact spring teeth are integrally connected to the hole wall of the forming hole, and the contact spring teeth are formed by partially blanking and thinning the supporting base formed by stamping at the forming hole;

[0008] Or the bearing substrate is made of copper or copper alloy material with a thickness greater than or equal to 1.2 mm; the thickness of the contact spring teeth is 0.2 mm-1.0 mm.

[0009] In some embodiments, the contact spring teeth are arranged obliquely and the distal ends thereof form a reversely curved arc-shaped guide section.

[0010] In some embodiments, the contact spring teeth are transverse teeth, which are integrally formed on the left and right walls of the forming hole, and the insertion interface is formed on the right side of the sleeve body;

[0011] Or the contact spring teeth are longitudinal teeth, which are integrally formed on the front and rear walls of the forming hole, and the insertion interface is formed on the front side surface of the sleeve body.

[0012] In some embodiments, a plurality of conical holes are formed at the rear end of one carrier substrate, and a plurality of bosses are punched to form a plurality of bosses at the rear end of the other carrier substrate, and the bosses are reversely riveted to fit the inner conical surfaces of the conical holes.

[0013] In some embodiments, a rear end of one carrier substrate is provided with conical holes arranged in a rectangular shape with a conical hole in the center of the rectangle, and a rear end of another carrier substrate is provided with bosses arranged in the same manner as the conical holes.

[0014] In some embodiments, one supporting substrate is a straight sheet structure and the other supporting substrate is a Z-shaped sheet structure with secondary right-angle bends; or the two supporting substrates are two folded parts connected by an intermediate rib.

[0015] In some embodiments, the sheath is formed by stamping and bending an elastic metal strip, and is connected and formed by a plurality of dovetail groove structures.

[0016] In some embodiments, the front and rear side walls and the right side wall of the sheath are placed in the positioning grooves of the carrier base, and the upper and lower end surfaces of the support ears at both ends of the side walls of the sheath are connected to the inner walls of the two carrier bases.

[0017] In some embodiments, the upper and lower sides of the sheath are provided with a plurality of longitudinal or transverse reinforcing ribs;

[0018] The sheath is provided with several material reduction grooves at the bends.

[0019] The beneficial effects of this new high-current slot structure are: first, the contact spring teeth are formed by local thinning, which enables direct electrical contact with a thicker substrate, reduces the reed switching, effectively reduces product costs, and achieves lower total contact resistance, thereby having a higher current-carrying capacity, while also avoiding possible damage to the slot assembly by ultrasonic welding; second, the contact spring teeth are designed to be symmetrical up and down, with two groups of front and back or two groups of left and right staggered meshing, so that as many contact spring teeth as possible can be formed in a limited space; this arrangement makes the contact points between the contact spring teeth and the insert symmetrical up and down, and distributed in two rows of front and back or left and right, making the plug-in force staggered more smooth, which is beneficial to reducing the insertion force between the slot assembly and the insert, making the insertion force smoother, and at the same time dispersing the hot spots when overcurrent occurs. , which is conducive to heat dissipation and improves the current-carrying capacity of the slot assembly; thirdly, the reverse rivet connection of the load-bearing base can well ensure the good contact and connection strength of the base material, so as to realize the reliable connection between the upper and lower layers of the slot base, and ensure its connection strength and reliability under ultrasonic welding conditions, while helping to reduce the cracking or stress concentration problems that may occur in ultrasonic welding; fourthly, the sheath is designed with protective spring teeth, which makes up for the shortcomings of insufficient rigidity of the load-bearing base and contact spring tooth materials, and can continuously compensate for the positive pressure of the contact point, ensuring that it has a stable electrical contact positive pressure, so that the slot assembly can maintain stable and good electrical contact after aging and in a vibrating working environment; fifthly, the structure simplifies the parts, simplifies the manufacturing and assembly processes, and effectively reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional schematic diagram of a novel straight high-current slot structure according to the first embodiment of the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional schematic diagram of the novel high current slot structure is shown;

[0022] Figure 3 for Figure 1 A three-dimensional schematic diagram of the slot component shown;

[0023] Figure 4 for Figure 1 a three-dimensional schematic diagram of the sheath shown;

[0024] Figure 5 This is a three-dimensional schematic diagram of a curved new high-current slot structure according to a second embodiment of the present invention;

[0025] Figure 6 for Figure 5 The schematic diagram of the front view of the new high current slot structure shown;

[0026] Figure 7 for Figure 5 A three-dimensional schematic diagram of the slot component shown;

[0027] Figure 8 for Figure 5 a three-dimensional schematic diagram of the sheath shown;

[0028] Slot component 1, bearing base 10, forming hole 100, conical hole 101, boss 102, positioning groove 103, contact spring tooth 11, guide section 12, middle rib 13;

[0029] The sheath 2, the sheath body 20, the plug-in port 200, the protective spring teeth 21, the support ears 22, the material reduction groove 23, the reinforcing ribs 24, and the dovetail groove structure 25. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0031] Figures 1 to 8 The schematic diagram shows a novel high-current slot structure according to an embodiment of the present invention. As shown in the figure, the novel high-current slot structure includes: a slot member 1 and a sheath 2;

[0032] The slot component 1 includes two supporting substrates 10 connected by reverse rivets at the rear ends and relatively spaced at the front ends. The supporting substrates 10 are preferably made of copper or copper alloy with a thickness greater than or equal to 1.2 mm. A forming hole 100 is provided at the front end of the supporting substrate 10, and the forming hole 100 is preferably a rectangular through hole. Two groups of contact spring teeth 11 that are relatively staggered and meshed and equidistant are provided in the forming hole 100. The thickness of the thinned contact spring teeth 11 is less than the thickness of the supporting substrate 10. The contact spring teeth 11 of the two supporting substrates 10 are symmetrical up and down and constitute a slot. Preferably, the contact spring teeth 11 are integrally connected to the hole wall of the forming hole 100. The contact spring teeth 11 are formed by locally blanking and thinning the supporting substrate 10 at the forming hole 100 by stamping. The thickness of the contact spring teeth 11 is preferably 0.2 mm-1.0 mm. The contact spring teeth 11 of this structure replace the transfer spring of the traditional slot assembly, which has a simpler structure and better cost. At the same time, it can avoid the problem of cracking of the transfer spring when the slot assembly and the cable are ultrasonically welded.

[0033] The sheath 2 includes a sheath body 20 with a hollow interior and an open rear end. The upper and lower walls of the sheath body 20 are provided with protective spring teeth 21 with the same distribution as the contact spring teeth 11. An insertion port 200 is provided on one side of the sheath body 20. The sheath body 20 is inserted into and interference-covered to connect the front outer walls of the two supporting substrates 10. The protective spring teeth 21 fit the outer walls of the contact spring teeth 11 to continuously provide positive pressure compensation for them. The insert enters the slot along the insertion port 200 and elastically contacts the contact spring teeth 11 on both sides.

[0034] The beneficial effects of this new high-current slot structure are: first, the contact spring teeth 11 are formed by local thinning, which realizes direct electrical contact with a thicker substrate, reduces the spring transfer, effectively reduces product costs, and achieves lower total contact resistance, thereby having a higher current carrying capacity, and also avoids the damage that may occur to the slot assembly by ultrasonic welding; second, the contact spring teeth 11 are designed to be symmetrical in the upper and lower parts, and arranged in two groups front and back or two groups left and right in an interlaced meshing manner, so as to realize the formation of as many contact spring teeth as possible in a limited space; this arrangement makes the contact points between the contact spring teeth and the plug-in piece symmetrical in the upper and lower parts, and distributed in two rows front and back or left and right, so that the peak of the plug-in force is more smooth, which is beneficial to reducing the insertion force between the slot assembly and the plug-in piece, making the insertion force smoother, and at the same time, the hot spots are dispersed when overcurrent occurs, which is effective It is conducive to heat dissipation and improves the current-carrying capacity of the slot assembly; thirdly, the reverse rivet connection of the supporting base 10 can well ensure the good contact and connection strength of the base material, so as to realize the reliable connection between the upper and lower layers of the slot base, and ensure its connection strength and reliability under ultrasonic welding conditions, while helping to reduce the cracking or stress concentration problems that may occur in ultrasonic welding; fourthly, the sheath 2 is designed with protective spring teeth 21, which makes up for the shortcomings of insufficient rigidity of the supporting base 10 and the contact spring teeth 11 materials, and can well and continuously compensate for the positive pressure of the contact point, ensuring that it has a stable electrical contact positive pressure, so that the slot assembly can maintain stable and good electrical contact after aging and in a vibrating working environment; fifthly, the structure simplifies the parts, simplifies the manufacturing and assembly process, and effectively reduces costs.

[0035] Preferably, Figures 1 to 8 As shown, the contact spring teeth 11 are tilted and the ends thereof form a reversely curved arc-shaped guide section 12. The beneficial effect is that the plug-in guide structure enables the slot assembly and the insert to be plugged in smoothly and steadily.

[0036] Preferably, Figures 1 to 4 As shown, in the first embodiment, the new high-current slot structure is a straight structure, the contact spring teeth 11 are horizontal teeth, which are integrally formed on the left and right walls of the forming hole 100, and the plug-in port 200 is formed on the right side of the sleeve 20. The beneficial effect is that the straight structure is suitable for direct plug-in application scenarios.

[0037] Preferably, Figures 5 to 8 As shown, in the second embodiment, the new high-current slot structure is a curved structure, the contact spring teeth 11 are longitudinal teeth, which are integrally formed on the front and rear walls of the molded hole 100, and the plug interface 200 is formed on the front side of the sleeve 20. The beneficial effect is that the curved structure is suitable for corner connection application scenarios.

[0038] Further, if Figures 1 to 3 、 Figure 5 as well as Figure 7As shown, a plurality of conical holes 101 are formed at the rear end of one carrier substrate 10, and a plurality of bosses 102 are stamped and formed at the rear end of the other carrier substrate 10. The bosses 102 are then riveted against the inner conical surfaces of the conical holes 101. The beneficial effect is that this reverse rivet structure provides a tight fit and high fit strength, effectively reducing the internal resistance of the carrier substrate 10.

[0039] Preferably, the rear end of one carrier substrate 10 is provided with conical holes 101 arranged in a rectangular pattern, with one conical hole 101 located in the center of the rectangle, and the rear end of the other carrier substrate 10 is provided with bosses 102 arranged in the same pattern as the conical holes 101. This has the beneficial effect of optimizing the number and arrangement of rivet points, further optimizing the fit and providing high fit strength, and effectively reducing the internal resistance of the carrier substrate 10.

[0040] Furthermore, one supporting substrate 10 is a straight sheet structure and the other supporting substrate 10 is a Z-shaped structure sheet with a secondary right-angle bend, the rear flat plate of the Z-shaped structure sheet and the rear end of the straight sheet structure are riveted together, and the front flat plate and the straight sheet structure are relatively spaced apart.

[0041] Preferably, the two supporting substrates 10 are two folded parts connected by a middle rib 13 .

[0042] Furthermore, the sheath 2 is formed by stamping and bending an elastic metal strip, and is connected and formed by a plurality of dovetail groove structures 25. The beneficial effect is that the arrangement has high dimensional accuracy and good strength.

[0043] Preferably, the magnitude of the compensated positive pressure is adjusted by increasing or decreasing the length and bending height of the sheath spring teeth 21 .

[0044] Preferably, positioning grooves 103 are provided on the front, rear, and right sides of the carrier substrate 10, and the front, rear, and right sidewalls of the sleeve 2 fit snugly within these grooves. This advantageously improves installation precision. Support ears 22 are provided at each end of each sidewall of the sleeve 2. The upper and lower surfaces of the ears 22 fit snugly onto the opposing inner walls of the two carrier substrates 10. This advantageously supports and protects the structural stability of the carrier substrate 10, preventing deformation and other harmful damage to the slot component 1 during assembly and operation.

[0045] Preferably, the upper and lower sides of the sheath 2 are provided with a plurality of longitudinal or transverse reinforcing ribs 24. The beneficial effect is that the reinforcing ribs 24 are provided to make the sheath 2 have good strength.

[0046] Preferably, in order to reduce the residual stress after bending, the sheath 2 is designed with multiple material reduction grooves 23 at the bending part to avoid defects such as warping and deformation after forming.

[0047] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. New high current slot structure, characterized by: It comprises: a slot member (1) and a sheath (2); The slot component (1) comprises two supporting bases (10) whose rear ends are connected by reverse rivets and whose front ends are relatively spaced apart. The front ends of the supporting bases (10) are provided with a forming hole (100) which passes through the front ends up and down. Two groups of contact spring teeth (11) which are relatively staggered and meshed and are equally spaced are provided in the forming hole (100). The thickness of the thin-molded contact spring teeth (11) is less than the thickness of the supporting bases (10). The contact spring teeth (11) of the two supporting bases (10) are symmetrical up and down and form a slot. The protective sleeve (2) comprises a sleeve body (20) with a hollow interior and an open rear end. The upper and lower walls of the sleeve body (20) are provided with protective spring teeth (21) having the same distribution as the contact spring teeth (11). A plug-in interface (200) is provided on one side of the sleeve body (20). The sleeve body (20) is inserted into and covers the front outer walls of two supporting substrates (10) with interference fit. The protective spring teeth (21) fit the outer walls of the contact spring teeth (11). The insert piece enters the slot along the plug-in interface (200) and elastically contacts the contact spring teeth (11) on both sides.

2. The novel high current slot structure according to claim 1, characterized in that: The contact spring tooth (11) is integrally connected to the hole wall of the forming hole (100), and the contact spring tooth (11) is formed by partially blanking and thinning the support base (10) formed by stamping at the forming hole (100); Or the bearing substrate (10) is made of copper or copper alloy material with a thickness greater than or equal to 1.2 mm; and the contact spring teeth (11) have a thickness of 0.2 mm to 1.0 mm.

3. The novel high current slot structure according to claim 1, characterized in that: The contact spring teeth (11) are arranged obliquely and the ends thereof form a reversely curved arc-shaped guide section (12).

4. The novel high current slot structure according to any one of claims 1 to 3, characterized in that: The contact spring teeth (11) are transverse teeth, which are integrally formed on the left and right walls of the forming hole (100), and the insertion port (200) is formed on the right side of the sleeve body (20); Or the contact spring teeth (11) are longitudinal teeth, which are integrally formed on the front and rear walls of the forming hole (100), and the insertion port (200) is formed on the front side of the sleeve body (20).

5. The novel high current slot structure according to claim 1, characterized in that: A plurality of conical holes (101) are formed at the rear end of one of the supporting bases (10), and a plurality of bosses (102) are punched out at the rear end of the other supporting base (10), and the bosses (102) are reversely riveted to fit the inner conical surfaces of the conical holes (101).

6. The novel high current slot structure according to claim 5, characterized in that: The rear end of one carrier base (10) is provided with the conical holes (101) arranged in a rectangular pattern, with one conical hole (101) located in the center of the rectangle; the rear end of the other carrier base (10) is provided with bosses (102) arranged in the same pattern as the conical holes (101).

7. The novel high current slot structure according to claim 1, characterized in that: One of the supporting substrates (10) is a straight sheet structure and the other supporting substrate (10) is a Z-shaped structural sheet with secondary right-angle bends; or the two supporting substrates (10) are two folded parts connected by an intermediate rib (13).

8. The novel high current slot structure according to claim 1, characterized in that: The sheath (2) is formed by stamping and bending an elastic metal strip and is connected and formed by a plurality of dovetail groove structures (25).

9. The novel high current slot structure according to claim 8, characterized in that: The front and rear side walls and the right side wall of the sheath (2) are placed in affixed relation to the positioning groove (103) of the carrier base (10), and the upper and lower end surfaces of the support ears (22) at both ends of the side walls of the sheath (2) are in affixed relation to the inner walls of the two carrier bases (10).

10. The novel high current slot structure according to claim 8, characterized in that: The upper and lower sides of the sheath (2) are provided with a plurality of longitudinal or transverse reinforcing ribs (24); The sheath (2) is provided with a plurality of material reduction grooves (23) at the bending portion.

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