Photovoltaic copper-aluminum connector limiting ring assembling device

Abstract

The utility model discloses a photovoltaic copper-aluminum connector limiting ring assembling device, which comprises a round bar and a reset device, a sleeve is sleeved outside the round bar, and when the head end of the round bar extends out of the head end of the sleeve, the reset device is used for enabling the head end of the round bar to retract into the sleeve; the reset device comprises a spring and a spring limiting block, the spring limiting block is arranged on the round bar and located at the tail end of the sleeve, and the spring is arranged on the round bar in a sleeving mode and supported between the spring limiting block and the sleeve. The limiting ring can be pushed to the limiting ring installation position of the plastic shell, the limiting ring is installed in place at a time, the installation efficiency and accuracy of the limiting ring are improved, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic copper-aluminum connectors, and in particular to a special assembly device for a photovoltaic copper-aluminum connector limit ring, which can realize the assembly of the limit ring to a specified position inside the photovoltaic copper-aluminum connector. Background Art

[0002] Common photovoltaic connectors use copper cables, and the connectors use MC4 all-copper male and female connectors for plugging. The connectors are made of copper strips through continuous stamping. This structure can directly fix the limit ring on the connector, and then directly insert the connector and the limit ring into the specified position at one time through the shrinkage inside the plastic shell. This structure is only suitable for connecting copper wires.

[0003] In recent years, a photovoltaic-specific copper-aluminum connector has been developed on the market. The MC4 male-female plug-in structure is designed on the copper-aluminum joint to replace the MC4 joint commonly used on the market. It can also be plugged with the commonly used MC4 joint on the market to achieve the connection between copper wire and aluminum wire. This method can replace the copper wire at one end with aluminum wire, reducing production costs, but this method requires a separately designed stainless steel metal limit ring.

[0004] For example, the straight-plug copper-aluminum connector disclosed in CN111952755A includes a plastic shell, which has an insertion cavity and an installation cavity in sequence, and a joint is installed in the installation cavity. The shape of the installation cavity corresponds to the shape of the joint, and the joint is composed of a copper tube and an aluminum tube, the diameter of the copper tube is smaller than the diameter of the aluminum tube, and the copper tube and the aluminum tube are connected by friction welding; the insertion cavity is located at the head end of the plastic shell, and the copper tube of the joint extends into the insertion cavity, and the diameter of the insertion cavity is larger than the diameter of the copper tube; the tail end of the plastic shell (the end away from the insertion cavity) is provided with a seal and other components; in order to fix the position of the joint, a limit ring is arranged on the outer sleeve of the copper tube, and the limit ring has an outer fin and an inner fin, and the inner fin and the outer fin are in opposite directions; the copper tube has an inner annular groove, and at the inner annular groove, the installation cavity of the plastic shell has an outer annular groove, and the inner fin is stuck in the inner annular groove, and the outer fin is stuck in the outer annular groove. The copper-aluminum joint cooperates with the inner annular groove through the limit ring to prevent loosening, and cooperates with the outer annular groove inside the plastic shell to effectively prevent the copper-aluminum joint from loosening. If the connector is loose, it will affect the insertion depth of the connector. After the plastic shells at both ends are inserted, the contact area between the two connectors may be reduced, thereby increasing the resistance and causing safety hazards.

[0005] From the above content, it can be seen that the inner diameter of the outer annular groove needs to be larger than the inner diameter of the insertion cavity, the outer diameter of the outer fin needs to be less than or equal to the inner diameter of the outer annular groove and larger than the inner diameter of the insertion cavity, the inner diameter of the inner annular groove needs to be smaller than the outer diameter of the copper tube, the inner diameter of the inner fin needs to be greater than or equal to the inner diameter of the inner annular groove and smaller than the outer diameter of the copper tube, the maximum diameter of the outer fin is larger than the diameter of the limit ring body, the minimum diameter of the inner fin is smaller than the diameter of the limit ring body, the opening of the outer fin needs to face the tail end of the plastic shell, and the opening of the inner fin faces the head end of the plastic shell, so that the positioning of the joint can be achieved through the limit ring.

[0006] Commonly, the inner diameter of the insertion cavity is smaller than the inner diameter of the installation cavity, the inner diameter of the installation cavity is equal to the outer diameter of the aluminum tube, and the outer diameter of the limit ring body is equal to the inner diameter of the insertion cavity. When the limit ring is inserted into the insertion cavity from one side of the installation cavity, it is necessary to first reduce the outer diameter of the limit ring so that the outer diameter of the outer fin is smaller than the inner diameter of the insertion cavity, so that the limit ring can be sent through the installation cavity into the limit ring assembly position of the insertion cavity; otherwise, the outer fin is not easy to effectively penetrate the insertion cavity, and the operation is difficult. After the limit ring reaches the assembly position, the outer diameter of the limit ring needs to be expanded so that the limit ring is stuck in the specified position of the insertion cavity (the outer fin is stuck in the outer annular groove) to position the limit ring; otherwise, the limit ring will be offset and skewed, affecting the installation of subsequent processes.

[0007] Even if the inner diameter of the insertion cavity is larger than the inner diameter of the installation cavity, when the limit ring is inserted into the insertion cavity from the side of the installation cavity, the outer diameter of the limit ring needs to be reduced first, otherwise the outer fin will not easily pass through the installation cavity into the insertion cavity; then the outer diameter of the limit ring needs to be expanded so that the limit ring is stuck in the specified position of the insertion cavity, otherwise the limit ring will be offset and skewed. Since the inner diameter of the insertion cavity is larger than the inner diameter of the installation cavity, it is more difficult to expand the limit ring from the side of the installation cavity; if the limit ring is expanded directly from the side of the insertion cavity, although it is easy to operate, it is still necessary to expand the outer diameter of the limit ring.

[0008] Although the stop ring can be inserted into the insertion cavity from the head end of the plastic shell (the end away from the installation cavity), it is also necessary to first reduce the outer diameter of the stop ring and then expand the outer diameter. In addition, since the opening of the outer fin is toward the tail end of the plastic shell, during the insertion of the stop ring, the outer fin is easy to contact with the inner wall of the insertion cavity, which may cause damage to the inner wall of the insertion cavity, the outer fin, and the stop ring, affecting product quality.

[0009] The limiting ring is usually an open ring, so that the limiting ring can be reduced or expanded, which makes it easier to install the limiting ring into the plastic housing.

[0010] At present, in the process of assembling the limit ring of the photovoltaic copper-aluminum connector, the reduction and expansion of the limit ring diameter are completed by manual operation alone; for example, the limit ring is manually pinched (to reduce the outer diameter of the limit ring) and inserted into the insertion cavity, and then the outer diameter of the limit ring is expanded to make the outer fin stuck in the outer annular groove. However, this operation method has the problems of low efficiency and high product defect rate, and cannot well guarantee the quality of the product. Utility Model Content

[0011] The purpose of the utility model is to provide a photovoltaic copper-aluminum connector limit ring assembly device, which can push the limit ring to the limit ring installation position of the plastic shell, install the limit ring in place at one time, and improve the limit ring installation efficiency and accuracy.

[0012] In order to achieve the above technical purpose, the technical solution of the utility model is:

[0013] A photovoltaic copper-aluminum connector limit ring assembly device comprises a round rod and a reset device. A sleeve is disposed on the outer shell of the round rod. When the head end of the round rod extends out of the head end of the sleeve, the reset device is used to retract the head end of the round rod into the sleeve. The sleeve is used to push the limit ring to move in the installation cavity, and the round rod is used to push the limit ring to move in the insertion cavity.

[0014] The reset device comprises a spring and a spring limit block, wherein the spring limit block is arranged on the round rod and located at the rear end of the sleeve, and the spring is sleeved on the round rod and supported between the spring limit block and the sleeve.

[0015] When in use, the limit ring is first placed in the installation cavity, and then the round rod is pushed. The round rod drives the sleeve to move together, and the sleeve pushes the limit ring to move toward the insertion cavity side. Since the spring is supported at the rear end of the sleeve, when the sleeve pushes the limit ring to move forward, the round rod can drive the sleeve to move together and push the limit ring. When the outer fin of the limit ring moves to the insertion cavity, since the opening of the outer fin faces the rear end of the plastic shell, the sleeve continues to push the limit ring, and the outer wall of the outer fin will be squeezed by the opening of the insertion cavity, thereby reducing the diameter of the limit ring, and then the outer fin can be inserted into the installation cavity. When the sleeve moves to the opening of the insertion cavity and cannot move further, it indicates that the limit ring has been inserted into the insertion cavity as a whole, and then the round rod continues to be pushed. The head end of the round rod extends out of the head end of the sleeve, further pushing the limit ring to move in the insertion cavity. When the tail end of the outer fin of the limit ring moves to the outer annular groove of the insertion cavity, the limit ring will pop open and expand because the outer fin is free from the restriction of the inner wall of the insertion cavity, so that the limit ring is stuck in the insertion cavity (the outer fin is stuck in the outer annular groove). When the round rod pushes the limit ring to move in the insertion cavity, the spring is squeezed by force, and when the round rod retreats and leaves the insertion cavity, the spring resets, causing the head end of the round rod to retract into the sleeve.

[0016] Preferably, the outer diameter of the sleeve is equal to the inner diameter of the installation cavity.

[0017] Preferably, the outer diameter of the round rod is equal to the inner diameter of the insertion cavity.

[0018] Preferably, the outer diameter of the head of the round rod is gradually reduced, and the outer diameter of the head end is smaller than the inner diameter of the tail end of the limiting ring after the reduction, so that the head end of the round rod can be inserted into the limiting ring after the reduction. For the limiting ring that cannot be opened and expanded, the conical structure of the head of the round rod can be inserted into the tail end of the limiting ring, so that the limiting ring is expanded, and then the limiting ring is stuck in the insertion cavity.

[0019] Preferably, the outer diameter of the round rod is equal to the inner diameter of the sleeve.

[0020] The sleeve is provided with a strip hole, and the round rod is provided with a positioning pin, which moves back and forth in the strip hole. The sleeve can be prevented from being separated from the round rod by the cooperation of the strip hole and the positioning pin.

[0021] The round rod is connected with a power device, and the power device is used for driving the round rod to reciprocate.

[0022] The utility model comprises a plastic shell fixing seat, on which the plastic shell of the copper-aluminum connector is fixedly placed, and a power device driving sleeve is inserted into a mounting cavity of the plastic shell.

[0023] The plastic shell fixing seat is arranged on the bottom plate, the power device is arranged on the top plate, a guide column is arranged between the top plate and the bottom plate, and the guide column is supported between the top plate and the bottom plate.

[0024] The bottom plate is provided with a positioning plate, and the plastic shell fixing seat is arranged on the positioning plate. The positioning plate is convenient for adjusting the position of the plastic shell fixing seat on the bottom plate, and is also convenient for replacing the unused plastic shell fixing seat.

[0025] The power device is a cylinder, and the cylinder is an adjustable stroke cylinder. The adjustable stroke cylinder is a damping cylinder with adjustable stroke disclosed in CN106195096B. The stroke of the round rod can be adjusted by the adjustable stroke cylinder to adapt to plastic shells of different sizes.

[0026] The beneficial effects of the utility model are:

[0027] 1. Pneumatic stamping is used to replace manual work. The entire limit ring assembly can be completed in one action. The operation is simple and the production efficiency is high.

[0028] 2. For products stamped with pneumatic devices, the assembly process of the limit rings can be unified to ensure product quality.

[0029] 3. During the production process, the assembly device does not need to pinch the opening of the clamp ring to make it smaller. By directly pushing the edge wall of the clamp ring, the external shape of the clamp ring is not changed, which ensures the quality and performance of the product.

[0030] 4. The assembly device is easy to operate. The operator only needs to put the product in the designated position and press the device button to complete the assembly action.

[0031] 5. The corresponding plastic shell fixing seat, round rod and sleeve on the replacement device can not only assemble the male and female connectors, but also be applicable to other plastic shells, with strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Figure 1 It is a schematic diagram of the structure of the male plastic shell.

[0034] Figure 2 It is a schematic diagram of the structure of the limit ring assembly device.

[0035] Figure 3 This is a schematic diagram of the structure of the round rod and sleeve in use.

[0036] Figure 4 It is a schematic diagram of the structure of the round rod and the sleeve in another usage state.

[0037] Figure 5 It is a schematic diagram of the structure of the limit ring in the assembled state.

[0038] Figure 6 It is a schematic diagram of the structure of another assembly state of the limit ring.

[0039] Figure 7 It is a schematic diagram of the structure of the limit ring in another assembly state.

[0040] Figure 8 This is a schematic diagram of the finished structure of the limit ring assembled into the male plastic housing. DETAILED DESCRIPTION

[0041] like Figure 1 , 8As shown, the male end of the photovoltaic copper-aluminum connector includes a plastic shell 2, a stop ring and a joint. The plastic shell 2 has an insertion tube at one end and a plastic cap thread 25 for connecting the plastic cap at the other end. The plastic shell 2 has an internal mounting cavity 21 and an insertion cavity 22. The inner diameter of the insertion cavity 22 is smaller than the inner diameter of the mounting cavity 21. The insertion cavity 22 includes a stop ring placement cavity 32. The inner diameter of the stop ring placement cavity 32 is smaller than the inner diameter of the mounting cavity 21 and larger than the inner diameter of the insertion cavity 22. The stop ring placement cavity 32 is provided with an outer annular groove 24. The inner diameter of the outer annular groove 24 is larger than the inner diameter of the stop ring placement cavity 32. The joint includes an aluminum joint and a copper joint. The outer diameter of the aluminum joint is larger than the outer diameter of the copper joint. When in use, the aluminum joint is located in the mounting cavity 21 and the copper joint is located in the insertion cavity 22. The outer diameter of the limit ring 31 is equal to the inner diameter of the limit ring placement cavity 32. The limit ring 31 includes inner fins and outer fins. The outer fins are arranged on the outside of the limit ring, and the outer fin openings are facing the tail end of the limit ring. The inner fins are arranged on the inside of the limit ring, and the inner fin openings are facing the head end of the limit ring. When in use, the limit ring is sleeved on the copper joint and located in the limit ring placement cavity 32. The outer fins are clamped in the outer annular groove 24. The copper joint is provided with an inner annular groove. The inner diameter of the inner annular groove is smaller than the outer diameter of the copper joint, and the inner fins are clamped in the inner annular groove.

[0042] like Figure 2-8 As shown, a photovoltaic copper-aluminum connector limit ring assembly device includes a bottom plate 8 and a top plate 44, a positioning plate 10 is arranged on the bottom plate 8, a first guide column 13, a second guide column 14 and a rear plate 45 are arranged between the bottom plate 8 and the top plate 44, the rear plate 45 is supported between the bottom plate 8 and the top plate 44, and is located at the rear side of the positioning plate 10, the first guide column 13 and the second guide column 14 are supported between the bottom plate 8 and the top plate 44, and are located at the front end of the left and right sides of the positioning plate 10, the first guide column 13 is located at the front end of one side of the positioning plate 10, and the second guide column 14 is located at the front end of the other side of the positioning plate 10.

[0043] A cylinder 17 is provided on the top plate 44, and the cylinder is an adjustable stroke cylinder. The adjustable stroke cylinder is, for example, the adjustable stroke damping cylinder disclosed in CN106195096B. The piston rod of the cylinder is connected to a cylinder connecting block 7, and the cylinder connecting block 7 is connected to a round rod 4. A sleeve 3 and a spring 6 are disposed outside the round rod 4. The spring 6 is supported between the sleeve 3 and the cylinder connecting block 7. The outer diameter of the cylinder connecting block 7 is larger than the outer diameter of the spring 6. The cylinder connecting block 7 constitutes a spring limit block. The sleeve 3 slides and moves along the round rod 4 toward the tail end of the round rod 4, so that the head end of the round rod 4 extends out of the sleeve 3 head end. The spring 6 causes the sleeve 3 to slide and reset toward the head end of the round rod 4.

[0044] The outer diameter of the sleeve 3 is equal to the inner diameter of the installation cavity, and the inner diameter is equal to the outer diameter of the round rod 4. The outer diameter of the round rod 4 is equal to the inner diameter of the limiting ring placement cavity 32. The outer diameter of the head of the round rod 4 gradually decreases, and the outer diameter of the head end of the round rod 4 is smaller than the inner diameter of the tail end of the limiting ring after the reduction, so that the head end of the round rod 4 can extend into the limiting ring after the reduction.

[0045] The sleeve 3 is provided with a strip hole, which is arranged along the length direction of the sleeve 3. The round rod 4 is provided with a positioning pin 5. When the sleeve 3 slides back and forth along the round rod 4, the positioning pin 5 moves back and forth in the strip hole.

[0046] A plastic shell fixing seat 1 is disposed on the positioning plate 10 , a plastic shell 2 of the copper-aluminum connector is fixedly placed on the plastic shell fixing seat 1 , and a cylinder 17 drives the sleeve 3 to be inserted into the installation cavity of the plastic shell 2 .

[0047] A cylinder screw 16 is provided at the rear end of the cylinder 17, and the cylinder screw 16 is connected to an adjusting nut 15. The stroke of the piston rod is adjusted by adjusting the nut 15 to adjust the stroke of the round rod.

[0048] When in use, the insertion tube of the plastic shell 2 is inserted into the plastic shell fixing seat 1, the plastic cap thread 25 faces the sleeve 3, and the limit ring 31 is placed in the installation cavity 21. Then the cylinder 14 pushes the cylinder connection block 7, the cylinder connection block 7 drives the round rod 4, and the round rod 4 drives the sleeve 3 to move together, so that the sleeve 3 extends into the installation cavity 21 and pushes the limit ring 21 to move toward the side of the limit ring placement cavity 32; because the spring 6 is supported at the tail end of the sleeve 3, when the sleeve 3 pushes the limit ring 31 to move, the round rod 4 can drive the sleeve 3 to move together and push the limit ring 31. When the outer fin of the limit ring 31 moves to the cavity opening of the limit ring placement cavity 32, since the opening of the outer fin faces the plastic cap thread 25 of the plastic shell, the sleeve 3 continues to push the limit ring 31, and the outer wall of the outer fin is squeezed by the cavity opening of the limit ring placement cavity 32, thereby reducing the diameter of the limit ring 31, and then pushing the outer fin to penetrate into the cavity of the limit ring placement cavity 32. When the sleeve 3 moves to the opening of the limit ring placement cavity 32 and cannot move further, it indicates that the limit ring 31 has been completely inserted into the limit ring placement cavity 32, and then the cylinder continues to push the round rod 4, the head end of the round rod 4 extends out of the head end of the sleeve 3, enters the limit ring 31, and continues to push the limit ring 31 to move in the limit ring placement cavity 32. When the tail end of the outer fin of the limit ring 31 moves to the outer annular groove of the limit ring placement cavity 32, the limit ring 31 will automatically pop open and expand because the outer fin breaks free from the restriction of the inner wall of the limit ring placement cavity 32, and the round rod 4 that continues to move will extend into the interior of the limit ring 31, and then further expand the limit ring 31, so that the limit ring 31 is stuck in the limit ring placement cavity 32 (the outer fin is stuck in the outer annular groove). Since the head end of the round rod 4 will enter the limiting ring 31 , even if the limiting ring 31 does not automatically pop open and expand, the round rod 4 can still expand the limiting ring 31 so that the limiting ring 31 can be stuck in the limiting ring placement cavity 32 .

[0049] When the round rod 4 pushes the limiting ring 31 to move in the limiting ring placement cavity 32 , the spring 6 is squeezed by force; when the round rod 4 retreats and leaves the limiting ring placement cavity 32 , the spring 6 is reset to retract the head end of the round rod 4 into the sleeve 3 .

[0050] The above embodiments do not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A photovoltaic copper-aluminum connector limit ring assembly device, characterized in that: The utility model comprises a round rod and a resetting device. A sleeve is arranged on the outer shell of the round rod. When the head end of the round rod extends out of the head end of the sleeve, the resetting device is used for retracting the head end of the round rod into the sleeve.

2. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The reset device comprises a spring and a spring limit block, wherein the spring limit block is arranged on the round rod and located at the rear end of the sleeve, and the spring is sleeved on the round rod and supported between the spring limit block and the sleeve.

3. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The outer diameter of the sleeve is equal to the inner diameter of the installation cavity.

4. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The outer diameter of the round rod is equal to the inner diameter of the insertion cavity.

5. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The outer diameter of the head of the round rod is gradually reduced, and the head end of the round rod can extend into the reduced limiting ring.

6. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The outer diameter of the round rod is equal to the inner diameter of the sleeve.

7. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The sleeve is provided with a strip hole, and the round rod is provided with a positioning pin, and the positioning pin moves back and forth in the strip hole.

8. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 1, characterized in that: The round rod is connected with a power device, and the power device is used for driving the round rod to reciprocate.

9. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 8, characterized in that: The utility model comprises a plastic shell fixing seat, on which the plastic shell of the copper-aluminum connector is fixedly placed, and a power device driving sleeve is inserted into a mounting cavity of the plastic shell.

10. A photovoltaic copper-aluminum connector limit ring assembly device according to claim 8, characterized in that: The power device is a cylinder, and the cylinder is a cylinder with adjustable stroke.

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