CN220527259U

CN220527259U - Photovoltaic connector

Info

Publication number: CN220527259U
Application number: CN202321907543.2U
Authority: CN
Inventors: 何赛龙; 陈慧; 訾河山; 肖圣鹏; 何仲祺; 张�杰
Original assignee: Suzhou Huayang Aerospace Electric Co Ltd
Current assignee: Suzhou Huayang Aerospace Electric Co Ltd
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-02-23
Anticipated expiration: 2033-07-19

Abstract

The photovoltaic connector comprises two contact fitting pieces, two shells and two spring supporting coils, wherein a tubular cavity is formed in each shell, annular steps are formed in the cavity along the inner wall of the shell, and protrusions are formed on the outer walls of the contact fitting pieces; the spring supporting coil is installed on the contact fitting, the outer ring is provided with a spring arm, when the contact fitting is installed in the shell, the spring arm arranged on the spring supporting coil and the protrusions arranged on the outer wall of the contact fitting are respectively clamped on two sides of the annular step arranged in the shell, and when the two shells are connected, the two shells provided with the contact fitting are in butt joint. The utility model solves the problems of incomplete assembly, small pulling-out force and the like of the photovoltaic PV terminal connector during field installation. The error operation generated during oblique insertion is better avoided, and the positive position size of the product is better corrected.

Description

Photovoltaic connector

Technical Field

The present utility model relates to a photovoltaic connector.

Background

The photovoltaic PV terminal connector is used as an important component in the photovoltaic industry to provide direct current input and output for the photovoltaic inverter. As a part of the electrical connector, the photovoltaic PV terminal connector is structurally simpler, mainly comprises an electrical contact, a plastic housing, a sealing member and a nut, but is affected by the use environment, so that the performance requirements on the product are very strict. The requirements of high current and low cost are met, and stronger environmental resistance and chemical corrosion resistance are also required. The connector is divided into two types, namely board end installation and wire end installation, wherein the board end installation is matched with a manufacturer, and the wire end installation needs to be operated and installed on site. The working environment of the product is that the product works in the daytime when the product is electrified, the working is stopped at night, the working temperature in the daytime can reach about 85 ℃, and the coldest working temperature at night is about-40 ℃ because of the difference of temperature differences of different places at night, so that the device needs to bear severe environmental influence. The existing photovoltaic PV terminal connector is structurally at failure risk, and the phenomenon that the contact piece is separated from the plastic shell due to insufficient retention force in the actual use process is caused.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a photovoltaic connector.

The utility model is realized by the following technical scheme.

The utility model provides a photovoltaic connector, which comprises two contact fitting pieces, two shells and two spring supporting coils, wherein a tubular cavity is arranged in each shell, annular steps are arranged in the cavity along the inner wall of the shell, and protrusions are arranged on the outer walls of the contact fitting pieces; the spring supporting coils are arranged on the contact fitting, the outer ring is provided with spring arms, when the contact fitting is arranged in the shell, the spring arms arranged on the spring supporting coils and the bulges arranged on the outer wall of the contact fitting are respectively clamped at two sides of an annular step arranged in the shell, and when the contact fitting is connected, the two shells provided with the contact fitting are in butt joint; one of the two contact fitting pieces is a jack fitting piece, a crown spring is arranged in the jack fitting piece, the crown spring is arranged at the tail end of the jack fitting piece, the crown spring is cylindrical, a plurality of inwardly protruding contact strips are arranged on the inner wall of the crown spring, gaps at the upper end and the lower end of the crown spring are formed in the side wall of the crown spring, and S-shaped buckles are arranged at the upper end and the lower end of the crown spring.

Further, an annular step is arranged on the opening direction of the spring arm arranged on the spring supporting coil towards the inner wall of the shell.

Further, the number of the spring arms arranged on the spring supporting coils is more than three, and the spring arms are transversely and uniformly distributed along the outer walls of the spring supporting coils.

Further, the number of the protrusions arranged on the outer wall of the contact element assembly is more than three, and the protrusions are uniformly distributed along the transverse direction of the outer wall of the contact element assembly.

Furthermore, the installation part of the spring supporting coil of the contact element assembly is also provided with an annular groove, and the spring supporting coil is clamped in the annular groove during installation.

Further, when the spring coil is mounted on the contact element assembly, riveting is used for fixing.

Further, one of the contact assembly is a pin assembly, the shell mounted with the contact assembly is a head shell, a pin supporting spring coil is mounted on the pin assembly, a pin assembly protrusion is arranged on the pin assembly, the pin assembly is mounted in a cavity inside the head shell through the pin assembly protrusion and the pin supporting spring coil, the contact assembly further comprises a tail nut, a sealing rubber tube and a cable clamp, and the cable clamp, the sealing rubber tube and the tail nut are sequentially mounted at the tail end of the head shell.

Further, the other contact fitting is a jack fitting, the shell mounted with the jack fitting is a seat shell, the jack fitting is provided with a jack spring supporting ring, the jack fitting is provided with a jack fitting protrusion, the jack fitting is mounted in the cavity inside the seat shell through the jack fitting protrusion and the jack spring supporting ring, the contact fitting further comprises an O-shaped ring and a sealing gasket, and the O-shaped ring and the sealing gasket are sequentially mounted at the tail end of the seat shell and fastened through nuts.

Further, a crown spring for connecting the pin assembly is also arranged in the jack assembly.

Further, the pin assemblies and the socket assemblies may be interchangeable in the mounting locations of the head housing and the seat housing.

The utility model has the beneficial effects that: by the implementation of the utility model, the problems of incomplete assembly, small pulling-out force and the like of the photovoltaic PV terminal connector during field installation are solved. In the prior art, a plastic buckle is used, single-side stress can occur in the assembly process of the contact, or the buckle cannot be effectively overlapped on the clamping structure of the contact.

Drawings

FIG. 1 is a schematic diagram of a line end configuration of the present utility model;

FIG. 2 is a schematic view of the plate end structure of the present utility model;

FIG. 3 is a schematic view of a pin kit according to the present utility model;

FIG. 4 is a view in the direction A-A of FIG. 3;

FIG. 5 is a schematic view of a jack assembly of the present utility model;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a schematic illustration of a crown spring used in the present utility model;

in the figure: 11-pin assembly, 111-pin support coil, 112-pin assembly protrusion, 12-tail nut, 13-sealing rubber tube, 14-cable clamp, 15-head housing, 21-jack assembly, 211-jack support coil, 212-jack assembly protrusion, 213-crown spring, 22-O-ring, 23-sealing gasket, 24-nut, 25-seat housing.

Detailed Description

The technical solution of the present utility model is further described below, but the scope of the claimed utility model is not limited to the above.

As shown in fig. 1, in the line terminal structure according to the embodiment of the present utility model, the contact element assembly is a pin assembly 11, the housing mounted with the contact element assembly is a head housing 15, a pin support spring coil 111 is mounted on the pin assembly 11, a pin assembly protrusion 112 is disposed on the pin assembly 11, the pin assembly 11 and the pin support spring coil 111 are mounted in a cavity inside the head housing 15 through the pin assembly protrusion 112, and the line terminal structure further comprises a tail nut 12, a sealing rubber tube 13 and a cable clamp 14, wherein the cable clamp 14, the sealing rubber tube 13 and the tail nut 12 are sequentially mounted at the tail end of the head housing 15.

As shown in fig. 2, in the plate end structure according to the embodiment of the present utility model, the contact element assembly is a jack assembly 21, a housing installed with the contact element assembly is a seat housing 25, a jack support spring coil 211 is installed on the jack assembly 21, a jack assembly protrusion 212 is provided on the jack assembly 21, the jack assembly 21 is installed in a cavity inside the seat housing 25 through the jack assembly protrusion 212 and the jack support spring coil 211, and the contact element assembly further comprises an O-ring 22 and a sealing pad 23, and the O-ring 22 and the sealing pad 23 are sequentially installed at the tail end of the seat housing and fastened through a nut 24. Also mounted within the receptacle assembly 21 is a crown spring 213 for connecting the pin assembly 11. The crown spring is mounted at the end of the jack assembly 21, as shown in fig. 7, the crown spring 213 is cylindrical, the inner wall is provided with a plurality of inwardly protruding contact strips, the side wall of the crown spring 213 is provided with a gap penetrating the upper end and the lower end, and the upper end and the lower end of the crown spring 213 are respectively provided with an S-shaped buckle.

In particular use, the pin assembly 11 may also be mounted within the seat housing 25 and the socket assembly 21 may also be mounted within the head housing 15.

The plate end product structure mainly comprises a sealing structure of a product butt joint end, a contact element assembly fixing structure and a plate end sealing structure; the wire end structure mainly comprises a product butt joint end sealing structure, a contact fitting assembly fixing structure and a wire end sealing structure.

The butt joint end sealing structure is realized by the outer shells of two products and the middle O-shaped ring, and after the two products are matched, the protection effect is realized by realizing radial compression sealing on the O-shaped ring. The position of the O-shaped ring is arranged in the length range of the butt joint surface of the buckle;

the contact element assembly fixing structure adopts the same mode, namely the spring supporting coil and the contact element assembly are fixed together (the fixing mode is not limited by press fit and a hook), and the contact element assembly can be fixed in the process of inserting the contact element assembly from the tail end.

The contact element assembly (contact pin/jack) is divided into a front end contact area and a tail end crimping area, the tail end crimping area is a U-shaped groove, a spring supporting coil used for being fixed with the shell is installed at the middle transition section of the crimping area and the contact area, at least more than three bulges are designed between the spring supporting coil and the crimping area, the bulges are used for preventing the contact element assembly from being inserted when being assembled, and the bulge can limit the loading depth in the loading process.

The pin spring supporting coils and the jack spring supporting coils are provided with at least three spring arms which are outwards opened, the spring arms can shrink first in the assembly process, the spring arms punch cards after penetrating through the steps, and the end faces of the spring arms are clamped on the step faces.

An assembly step is designed in the housing, which can be matched with the assembly step. In the actual use process, the contact assembly is used for pressing the cable, and then the contact assembly of the pressed cable is directly assembled into the shell.

The difference between the board end installation and the wire end installation is that the nut 24 is required to be removed firstly during the board end installation, or the nut 24 is in a form of loose goods delivery, the board end shell with the sealing gasket 23 is installed on the equipment, and then the nut 24 is installed from the other side and is screwed according to the specified torsion. The wire end is installed by sequentially penetrating the sealing rubber tube 13, the cable clamp 14 and the tail nut 12 into the cable with the terminal being crimped. After the contact assembly of the cable which is well pressed is put into the shell, the sealing rubber tube 13 and the cable clamp 14 are pushed to the bottom, and finally the tail nut 12 is locked according to the specified torsion. The tail of the tail nut 12 is designed with a small anti-loose boss to prevent long-term natural loosening after the product is tightened.

The spring supporting ring is pre-installed on the contact element assembly to form an assembly. The advantage is that the assembly can be made directly with the housing without the need for secondary assembly. And the assembly error in the later stage is avoided, and the assembly cost is saved. Wherein the spring supporting coils are fully wrapped at the waist position of the contact fitting, are buckled in a concave-convex mode, and are connected in a riveting mode after being buckled. The device is self-integrated and is reliable in connection. Particularly, a plurality of protruding points are uniformly distributed on the spring supporting ring, so that the contact pin can be limited after being arranged in the shell, and shaking is prevented. Likewise, small raised structures are also provided on the contact assemblies. The front and rear parts are limited, so that the centrality of the contact pin after assembly can be better ensured. No deflection occurs. Not only can the assembly be easy, but also the assembly can be completed without shaking and core deviation. The contact assembly is assembled with the housing with the simplest structure achieving the most reliable assembly. The shell is internally provided with a step contact piece, the contact piece is assembled from the tail part after being pressed, the spring supporting coils arranged on the contact piece are opened through the step and then the spring arm is clamped on the step to prevent the spring arm from retreating, and the protrusions arranged on the contact piece can prevent the contact piece from advancing, so that the effect of stopping is achieved.

Claims

1. A photovoltaic connector, characterized in that: the contact assembly comprises two contact assemblies, two shells and two supporting spring coils, wherein a tubular cavity is formed in the shells, annular steps are formed in the cavities along the inner walls of the shells, and protrusions are formed on the outer walls of the contact assemblies; the spring supporting coils are arranged on the contact fitting, the outer ring is provided with spring arms, when the contact fitting is arranged in the shell, the spring arms arranged on the spring supporting coils and the bulges arranged on the outer wall of the contact fitting are respectively clamped at two sides of an annular step arranged in the shell, and when the contact fitting is connected, the two shells provided with the contact fitting are in butt joint; one of the two contact fitting pieces is a jack fitting piece, a crown spring is arranged in the jack fitting piece, the crown spring is arranged at the tail end of the jack fitting piece, the crown spring is cylindrical, a plurality of inwardly protruding contact strips are arranged on the inner wall of the crown spring, gaps at the upper end and the lower end of the crown spring are formed in the side wall of the crown spring, and S-shaped buckles are arranged at the upper end and the lower end of the crown spring.

2. The photovoltaic connector of claim 1, wherein: the opening direction of the spring arm arranged on the spring supporting coil faces to the inner wall of the shell body, and an annular step is arranged on the inner wall of the shell body.

3. The photovoltaic connector of claim 1, wherein: the number of the spring arms arranged on the spring supporting coil is more than three, and the spring arms are transversely and uniformly distributed along the outer wall of the spring supporting coil.

4. The photovoltaic connector of claim 1, wherein: the number of the protrusions arranged on the outer wall of the contact element assembly is more than three, and the protrusions are uniformly distributed along the transverse direction of the outer wall of the contact element assembly.

5. The photovoltaic connector of claim 1, wherein: the spring supporting coil mounting part of the contact element assembly is also provided with an annular groove, and the spring supporting coil is clamped in the annular groove during mounting.

6. The photovoltaic connector of claim 1, wherein: and when the spring supporting coil is installed on the contact fitting, the spring supporting coil is fixed by riveting.

7. The photovoltaic connector of claim 1, wherein: one of them contact assembly is the contact assembly, and the casing of its installation is the head shell, install contact pin on the contact assembly and prop the spring coil, be equipped with contact pin assembly arch on the contact assembly, contact pin assembly pass through contact pin assembly arch with contact pin prop the spring coil install in the inside cavity of head shell, still include afterbody nut, sealing rubber pipe and cable clamp, sealing rubber pipe and afterbody nut install in proper order in the head shell tail end.

8. The photovoltaic connector of claim 7, wherein: the other contact piece is a jack piece, a shell mounted with the other contact piece is a seat shell, a jack spring supporting coil is mounted on the jack piece, a jack piece assembling protrusion is arranged on the jack piece, the jack piece is mounted in a cavity inside the seat shell through the jack piece assembling protrusion and the jack spring supporting coil, the contact piece further comprises an O-shaped ring and a sealing gasket, and the O-shaped ring and the sealing gasket are sequentially mounted at the tail end of the seat shell and fastened through nuts.

9. The photovoltaic connector of claim 8, wherein: and a crown spring for connecting the pin assembly is also arranged in the jack assembly.

10. The photovoltaic connector of claim 8, wherein: the pin assemblies and the socket assemblies are interchangeable in the mounting locations of the head housing and the seat housing.