An electrical connection terminal

Abstract

This invention provides an electrical connection terminal, including a female connector and a male connector. The female connector includes a first insulating shell, within which a transition component is slidably connected. The transition component has a first contact finger. The male connector includes a second insulating shell, on which a second contact finger mates with the first contact finger. During the movement of the male connector and the transition component towards a energized position, the gas in the first chamber can be compressed. During the movement of the male connector and the transition component towards a de-energized position, the gas in the first chamber can flow between the first and second contact fingers. With this structure, during the insertion of the male connector into the female connector, the gas in the first chamber can be compressed, and during the removal of the male connector, the gas in the first chamber can flow between the first and second contact fingers, achieving the effect of automatically controlling gas flow for arc extinguishing.

Description

TECHNICAL FIELD

[0001] The present application relates to a connecting terminal, in particular to an electrical connecting terminal. BACKGROUND

[0002] As a key component for realizing circuit conduction and disconnection in electrical systems, electrical connecting terminals are widely used in industrial equipment, power systems, electronic instruments and automation control systems. The main function of the electrical connecting terminal is to realize the quick connection or disconnection of the circuit through plug-in operation, to ensure the safety and stability of electrical equipment in operation. With the development of electrical equipment towards high voltage, large current and high frequency operation, the performance requirements of the electrical connecting terminal are also increasing, especially how to effectively suppress the generation of arc during the plug-in process, which has become an important problem to improve product safety.

[0003] The common structure of the electrical connecting terminal is currently a direct plug-in type, including a female connector and a male connector, each provided with a contact finger that cooperates with each other. During the process of plugging or separating, especially when operating under a live condition, an arc is easily generated between the contact fingers due to the voltage difference. This arc not only instantaneously burns the surface of the contact finger, causing poor contact, increased resistance and other problems, but also may cause fire, short circuit and other safety accidents, affecting the safety of equipment and personnel.

[0004] Therefore, there is an urgent need for an electrical connecting terminal that can automatically control gas flow to suppress the generation of arc during the plug-out process. SUMMARY

[0005] To overcome the existing technical problems, the present application provides an electrical connecting terminal that can automatically control gas flow to suppress the generation of arc during the plug-out process.

[0006] The present application adopts the following technical solutions.

[0007] An electrical connecting terminal includes a female connector and a male connector. The female connector includes a first insulating shell, a transition assembly is slidably connected in the first insulating shell, and a first contact finger is provided on the transition assembly.

[0008] A disconnection point and a connection point are provided on the moving track of the transition assembly. A first chamber is formed between the end of the transition assembly close to the connection point and the first insulating shell, and a second chamber is formed between the end of the transition assembly close to the disconnection point and the first insulating shell.

[0009] The male connector can drive the transition assembly to reciprocally move between the connection point and the disconnection point. The male connector includes a second insulating shell, and a second contact finger that cooperates with the first contact finger is provided on the second insulating shell.

[0010] In the process that the male connector drives the transition assembly to move towards the energization point, the gas in the first chamber can be compressed; in the process that the male connector drives the transition assembly to move towards the de-energization point, the gas in the first chamber can flow through the first contact finger and the second contact finger.

[0011] As a further improvement of the application, a separation point is arranged between the energization point and the de-energization point, when the transition assembly moves to the separation point, the second contact finger keeps moving towards the de-energization point, and the first contact finger has a tendency to move towards the energization point.

[0012] As a further improvement of the application, a first locking assembly is arranged between the first insulating shell and the transition assembly, the first locking assembly has a locked state and an unlocked state, when the first locking assembly is in the locked state, the second insulating shell and the transition assembly are connected as a whole;

[0013] When the first locking assembly is in the unlocked state, the second insulating shell and the transition assembly can be separated;

[0014] When the second insulating shell and the transition assembly move between the energization point and the separation point, the first locking assembly is in the locked state.

[0015] As a further improvement of the application, the first locking assembly comprises a locking cylinder, a pushing piece slidingly arranged in the locking cylinder, a reset elastic piece connected to the locking cylinder and the pushing piece, and a first locking bead, the locking cylinder is provided with a locking through hole for placing the first locking bead, the locking through hole is provided with a first wall, and the pushing piece is provided with a pushing groove;

[0016] The second insulating shell is provided with an insulating hole for inserting the locking cylinder, the inner wall of the insulating hole is provided with a locking hole, and the locking hole is provided with a locking elastic piece and a locking block;

[0017] The first insulating shell is connected with a top rod located on the moving track of the pushing piece;

[0018] In the process that the male connector drives the transition assembly to move from the de-energization point to the separation point, the top rod abuts against the pushing piece and pushes the pushing piece to be close to the second insulating shell, when the transition assembly is in the separation point, the pushing groove corresponds to the first locking bead, so that the first locking bead enters the pushing groove, and the locking elastic piece drives the locking block to abut against the first wall to lock the movement of the locking cylinder.

[0019] As a further improvement of the application, a jet hole is arranged in the side wall of the locking cylinder;

[0020] In the process that the transition assembly moves from the separation point to the de-energization point, the jet hole is in an open state;

[0021] When the transition assembly is in the energization point or the de-energization point, the jet hole is in a closed state.

[0022] As a further improvement of the present application, the transition assembly comprises a piston and a sliding seat, the sliding seat is located at one end of the piston close to the energized position, a tension spring is arranged between the sliding seat and the piston, a first compression spring is connected between the sliding seat and the first insulating shell, and the first compression spring makes the sliding seat have a tendency to move to the de-energized position;

[0023] The first insulating shell is provided with a second locking assembly acting on the sliding seat, and the second locking assembly has a locked state and an unlocked state;

[0024] When the second locking assembly is in the locked state, the second locking assembly locks the sliding seat at the energized position;

[0025] When the second locking assembly is in the unlocked state, the sliding seat maintains the tendency to move to the de-energized position;

[0026] When the piston moves to the de-energized position, the second locking assembly is in the unlocked state.

[0027] As a further improvement of the present application, the second locking assembly comprises a first lock hole located on the moving track of the second insulating shell, and a second lock hole located on the moving track of the sliding seat, the first lock hole and the second lock hole are communicated through a hydraulic pipeline, and the first lock hole and the second lock hole are each provided with a first elastic element, a locking block, and a push block matched with the locking block, the push block is sealingly and slidingly arranged in the hydraulic pipeline;

[0028] The second insulating shell and the sliding seat are each provided with a locking groove for the locking block to be inserted;

[0029] During the movement of the piston from the separation position to the de-energized position, the second insulating shell pushes the corresponding locking block to make it disengage from the locking groove of the second insulating shell, the locking block drives the push block to compress the liquid in the hydraulic pipeline, and then drives the locking block of the second lock hole to disengage from the locking groove of the sliding seat to unlock the sliding seat;

[0030] When the locking block of the first lock hole is inserted into the locking groove of the second insulating shell, the first elastic element of the second lock hole pushes the locking block to be inserted into the locking groove of the sliding seat.

[0031] As a further improvement of the present application, a circulating flow channel is arranged on the first insulating shell to communicate the first chamber and the second chamber, a one-way ventilation structure and a filter element are arranged in the circulating flow channel, and the one-way ventilation structure is used to limit the gas in the first chamber to flow into the second chamber through the circulating flow channel.

[0032] As a further improvement of the present application, the female connector further comprises a conductive cylinder and a conductive column slidingly connected with the conductive cylinder, an annular conductive wall is formed on the first contact finger, and a second compression elastic element is connected between the conductive column and the conductive cylinder; the second compression elastic element makes the conductive column have a tendency to move to the de-energized position;

[0033] When the transition assembly is at the energized position, the separation position, or any position between the two, the conductive post is in contact with the conductive wall.

[0034] When the transition assembly is at the de-energized position, the conductive post is separated from the conductive wall.

[0035] As a further improvement of the application, a third compression elastic member is arranged between the first and second insulating shells, so that the second insulating shell has a tendency to move away from the first insulating shell, a second locking bead is arranged on the first insulating shell, and a limiting block is arranged on the second insulating shell, and a second wall is arranged on the limiting block, and when the limiting block is matched with the first insulating shell, the second locking bead abuts against the second wall.

[0036] The application has the following beneficial effects:

[0037] 1. During the process of inserting the male connector into the female connector, the gas in the first chamber can be compressed, and during the process of pulling out the male connector, the gas in the first chamber can flow through the space between the first and second contact fingers, thereby achieving the effect of automatically controlling the gas flow to extinguish the arc.

[0038] 2. During the process of moving the second insulating shell from the energized position to the separation position, the first locking assembly is always in the locked state, thereby driving the piston to move together. At the same time, the second locking assembly locks the sliding block at the energized position, so that the piston and the sliding block move away from each other, and the tension spring is energized during this period. When the second insulating shell moves to the separation position, the second contact finger is kept moving towards the de-energized position at a certain speed under the driving of the second insulating shell, and the tension spring has accumulated enough tension at this time. Thus, when the first locking assembly is switched to the unlocked state, the second contact finger can continue to move towards the de-energized position at a certain speed, while the first contact finger is first stationary and then quickly moves towards the energized position under the action of the tension spring, and finally the first and second contact fingers are quickly separated.

[0039] 3. The circulation flow channel is arranged, which can extrude the gas in the second chamber into the first chamber when the transition assembly moves from the energized position to the de-energized position. The gas in the first chamber can be reused, thereby reducing the operating cost. At the same time, the filter member filters the gas flowing through the circulation flow channel, so as to prevent the dust generated by the arc in the second chamber from entering the first chamber along with the gas flow. Thus, when the first and second contact fingers are separated next time, the gas in the first chamber will not flow through the space between the two fingers, thereby avoiding affecting the arc-extinguishing effect of the gas flow. Through the arrangement of the one-way ventilation structure, the gas in the first chamber can be limited to flow into the second chamber through the circulation flow channel, and the gas in the first chamber can be compressed when the transition assembly moves from the de-energized position to the energized position. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0041] Figure 1 is a structural sectional view of the transition assembly of the present application at the energized point;

[0042] Figure 2 is Figure 1 is an enlarged view of the partial view A in FIG. 1;

[0043] Figure 3 is Figure 1 is an enlarged view of the partial view B in FIG. 1;

[0044] Figure 4 is a structural sectional view of the piston of the present application at the disengaged point;

[0045] Figure 5 is Figure 4 is an enlarged view of the partial view C in FIG. 1;

[0046] Figure 6 is a structural sectional view of the first locking assembly of the present application when switched to the unlocked state;

[0047] Figure 7 is a structural sectional view of the transition assembly of the present application at the de-energized point;

[0048] Figure 8 is a structural sectional view of the second insulating shell of the present application disengaged from the first insulating shell.

[0049] Explanation of reference signs:

[0050] 1-female connector, 11-first insulating shell, 111-top rod, 112-second locking bead, 12-transition assembly, 121-first contact finger, 1211-conductive wall, 122-piston, 123-sliding seat, 124-tension spring, 125-first compression spring, 13-first chamber, 14-second chamber, 15-first locking assembly, 151-locking cylinder, 1511-locking through hole, 1512-first wall, 1513-jet hole, 152-thrust piece, 1521-thrust groove, 153-reset elastic piece, 154-first locking bead, 16-inner shell, 17-outer shell, 2-male connector, 21-second insulating shell, 211-second contact finger, 212-insulating hole, 213-locking hole, 214-locking elastic piece, 215-locking block, 216-locking groove, 217-limiting block, 2171-second wall, 3-second locking assembly, 31-first locking hole, 32-second locking hole, 33-hydraulic pipeline, 34-first elastic piece, 35-locking block, 36-push block, 4-circulating flow channel, 41-one-way ventilation structure, 42-filtering piece, 5-conductive cylinder, 51-second compression elastic piece, 6-conductive column, 7-third compression elastic piece, 8-plug unlocking block, 81-unlocking matching block, 82-insulating wall. DETAILED DESCRIPTION

[0051] The accompanying drawings are only used for illustrative purposes and should not be understood as limiting the patent; in order to better illustrate the embodiments, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size.

[0052] It is understandable for those skilled in the art that some known structures and their descriptions in the drawings may be omitted. The technical solutions of the present application will be further described below in combination with the drawings and embodiments.

[0053] REFERENCE Figures 1 to 8 An electrical connection terminal includes a female connector 1 and a male connector 2, the female connector 1 includes a first insulating shell 11, a transition assembly 12 is slidingly connected in the first insulating shell 11, and a first contact finger 121 is arranged on the transition assembly 12;

[0054] A power-off point and a power-on point are arranged on the moving track of the transition assembly 12, a first chamber 13 is formed between the end of the transition assembly 12 close to the power-on point and the first insulating shell 11, and a second chamber 14 is formed between the end of the transition assembly 12 close to the power-off point and the first insulating shell 11;

[0055] The male connector 2 can drive the transition assembly 12 to reciprocate between the power-on point and the power-off point, and the male connector 2 includes a second insulating shell 21, and a second contact finger 211 is arranged on the second insulating shell 21 and matched with the first contact finger 121;

[0056] In the process that the male connector 2 drives the transition assembly 12 to move towards the energized position, the gas in the first chamber 13 can be compressed;

[0057] In the process that the male connector 2 drives the transition assembly 12 to move towards the de-energized position, the gas in the first chamber 13 can flow through the first contact finger 121 and the second contact finger 211.

[0058] In the process that the male connector 2 is inserted into the female connector 1, the second insulating shell 21 drives the transition assembly 12 to move from the de-energized position to the energized position, thereby compressing the gas in the first chamber 13, and in the process that the male connector 2 is pulled out of the second insulating shell 21, the gas in the first chamber 13 can flow through the first contact finger 121 and the second contact finger 211, achieving the effect of automatically controlling the gas flow arc extinguishing.

[0059] As a further improvement of the present application, a separation position is provided between the energized position and the de-energized position, when the transition assembly 12 moves to the separation position, the second contact finger 211 remains in a state of moving towards the de-energized position, and the first contact finger 121 has a tendency to move towards the energized position.

[0060] When the transition assembly 12 moves to the separation position, as a specific embodiment of the present application, the second contact finger 211 on the second insulating shell 21 remains in a state of moving towards the de-energized position under the action of the third compression elastic member 7, and the first contact finger 121 has a tendency to move towards the energized position under the action of the tension spring 124, so that the first contact finger 121 and the second contact finger 211 can quickly move away from each other. The probability of arc generation is inversely proportional to the distance, and the faster the speed of moving away, the greater the distance that needs to be overcome to generate an arc, thereby reducing the possibility of generating an arc, further reducing the generation of an arc, and improving the safety of the product.

[0061] As a further improvement of the present application, a first locking assembly 15 is provided between the first insulating shell 11 and the transition assembly 12, the first locking assembly 15 has a locked state and an unlocked state, when the first locking assembly 15 is in the locked state, the second insulating shell 21 and the transition assembly 12 are connected as a whole;

[0062] When the first locking assembly 15 is in the unlocked state, the second insulating shell 21 and the transition assembly 12 can be separated;

[0063] When the second insulating shell 21 and the transition assembly 12 move between the energized position and the separation position, the first locking assembly 15 is in the locked state.

[0064] Specifically, when the transition assembly 12 moves from the energized position to the separated position, the first locking assembly 15 switches from the locked state to the unlocked state. At the moment when the first locking assembly 15 switches to the unlocked state, since the second contact finger 211 remains in the state of moving toward the de-energized position, the first contact finger 121 has a tendency to move toward the energized position, and thus the first contact finger 121 and the second contact finger 211 can be quickly separated.

[0065] With reference to Figure 2 and Figure 5 , the first locking assembly 15 comprises a locking cylinder 151, a pushing piece 152 slidingly arranged in the locking cylinder 151, a reset elastic member 153 connected to the locking cylinder 151 and the pushing piece 152, and a first locking bead 154, the locking cylinder 151 is provided with a locking through hole 1511 for placing the first locking bead 154, the locking through hole 1511 is provided with a first wall 1512, and the pushing piece 152 is provided with a pushing groove 1521;

[0066] The second insulating shell 21 is provided with an insulating hole 212 for inserting the locking cylinder 151, the inner wall of the insulating hole 212 is provided with a locking hole 213, and the locking hole 213 is provided with a locking elastic member 214 and a locking block 215;

[0067] The first insulating shell 11 is connected with a top rod 111 located on the moving track of the pushing piece 152;

[0068] In the process that the male connector 2 drives the transition assembly 12 to move from the de-energized position to the separated position, the top rod 111 abuts against the pushing piece 152 and pushes the pushing piece 152 to be close to the second insulating shell 21, when the transition assembly 12 is at the separated position, the pushing groove 1521 corresponds to the first locking bead 154, so that the first locking bead 154 enters the pushing groove 1521, and the locking elastic member 214 drives the locking block 215 to abut against the first wall 1512 to lock the movement of the locking cylinder 151.

[0069] In the process that the male connector 2 drives the transition assembly 12 to move from the energized position to the separated position, the pushing piece 152 gradually moves away from the second insulating shell 21 under the action of the reset elastic member 153, so that the pushing groove 1521 is misaligned with the first locking bead 154, the first locking bead 154 is pushed to move in the direction of the locking hole 213, the locking block 215 is pushed to move away from the first wall 1512, and when the first locking assembly 15 is in the unlocked state, the second insulating shell 21 can be separated from the transition assembly 12.

[0070] With reference to Figure 2 and Figure 5 , the side wall of the locking cylinder 151 is provided with a gas injection hole 1513;

[0071] In the process that the transition assembly 12 moves from the separated position to the de-energized position, the gas injection hole 1513 is in an open state;

[0072] When the transition assembly 12 is at the energized position or the de-energized position, the gas jet hole 1513 is in a closed state.

[0073] As an embodiment of the present application, when the transition assembly 12 is at the de-energized position, the pusher 152 covers the gas jet hole 1513, and thus the gas jet hole 1513 is in a closed state. When the transition assembly 12 is at the energized position, the first contact finger 121 and the second contact finger 211 cover the gas jet hole 1513, and thus the gas jet hole 1513 is in a closed state. During the movement of the transition assembly 12 from the separation position to the de-energized position, the pusher 152 moves away from the gas jet hole 1513, and the first contact finger 121 and the second contact finger 211 are separated, so that the compressed gas in the first chamber 13 is jetted out through the gas jet hole 1513.

[0074] More specifically, due to the arrangement of the first locking assembly 15, during the movement of the male connector 2 from the energized position to the separation position, the first contact finger 121 and the second contact finger 211 always remain in contact and cover the gas jet hole 1513, so that the compressed gas in the first chamber 13 cannot be jetted out through the gas jet hole 1513. When the first locking assembly 15 is switched to the unlocked state, since the second contact finger 211 remains in a state of moving towards the de-energized position, the first contact finger 121 has a tendency to move towards the energized position, so that the first contact finger 121 and the second contact finger 211 quickly move away from each other, at this time, the first contact finger 121 and the second contact finger 211 no longer cover the gas jet hole 1513, so that the compressed gas in the first chamber 13 is directly jetted out through the gas jet hole 1513. And since the first contact finger 121 and the second contact finger 211 are separated in opposite directions, the compressed gas jetted out through the gas jet hole 1513 can directly act on the first contact finger 121 and the second contact finger 211, achieving the technical effect of automatic gas jet arc extinguishing.

[0075] As a further improvement of the present application, the transition assembly 12 comprises a piston 122 and a sliding seat 123, in the present embodiment, the piston 122 is in sealed sliding connection with the first insulating shell 11, the sliding seat 123 is located at one end of the piston 122 close to the energized position, a tension spring 124 is arranged between the sliding seat 123 and the piston 122, and a first compression spring 125 is connected between the sliding seat 123 and the first insulating shell 11, the first compression spring 125 makes the sliding seat 123 have a tendency to move towards the de-energized position;

[0076] The first insulating shell 11 is provided with a second locking assembly 3 acting on the sliding seat 123, the second locking assembly 3 has a locked state and an unlocked state;

[0077] When the second locking assembly 3 is in the locked state, the second locking assembly 3 locks the sliding seat 123 at the energized position;

[0078] When the second locking assembly 3 is in the unlocking state, the sliding seat 123 keeps the tendency of moving towards the de-energization point;

[0079] When the piston 122 moves to the de-energization point, the second locking assembly 3 is in the unlocking state.

[0080] Specifically, the conventional contact finger separation structure releases the spring stored elastic energy at the moment when the contactors switch from the energization state to the de-energization state, and separates the contactors from each other by the elastic energy of the spring. However, when the spring just starts to release the elastic energy, the contact fingers are still in a static state. Under the action of the elastic energy, the contact fingers change from the static state to the motion state, and gradually increase the moving speed, that is, the separation speed of the contactors gradually increases. It can be seen that the elastic energy needs a certain process to accelerate the contact fingers, which leads to that the separation speed of the conventional contact finger separation structure is slow in the front stroke of the contactor separation. Obviously, it is not conducive to arc extinction.

[0081] In the embodiment, during the movement of the second insulation shell 21 from the energization point to the separation point, the first locking assembly 15 is always in the locking state, thereby driving the piston 122 to move together. At the same time, the second locking assembly 3 locks the sliding seat 123 at the energization point, so that the piston 122 and the sliding seat 123 move away from each other, and the tension spring 124 stores energy during this period. When the second insulation shell 21 moves to the separation point, the second contact finger 211 has a certain speed of moving towards the de-energization point under the driving of the second insulation shell 21, and the tension spring 124 has stored enough tension at this time. In this way, when the first locking assembly 15 switches to the unlocking state at the moment, the second contact finger 211 can continue to move towards the de-energization point at a certain speed, while the first contact finger 121 is first static under the action of the tension spring 124, and then moves quickly to the energization point, and finally realizes the quick separation of the first contact finger 121 and the second contact finger 211.

[0082] As a further improvement of the present application, the second locking assembly 3 comprises a first lock hole 31 located on the movement track of the second insulation shell 21, and a second lock hole 32 located on the movement track of the sliding seat 123, the first lock hole 31 and the second lock hole 32 are communicated through a hydraulic pipeline 33, and the first lock hole 31 and the second lock hole 32 are each provided with a first elastic member 34, a locking block 35, and a push block 36 cooperating with the locking block 35, the push block 36 is sealingly and slidingly arranged in the hydraulic pipeline 33;

[0083] The second insulation shell 21 and the sliding seat 123 are each provided with a locking groove 216 for inserting the locking block 35;

[0084] In the process that the piston 122 moves from the disengagement point to the power-off point, the second insulating shell 21 pushes the corresponding locking block 35 to make it disengage from the locking groove 216 of the second insulating shell 21, the locking block 35 drives the push block 36 to compress the liquid in the hydraulic pipeline 33, and then drives the locking block 35 of the second locking hole 32 to disengage from the locking groove 216 of the sliding seat 123 to unlock the sliding seat 123.

[0085] When the locking block 35 of the first locking hole 31 is inserted into the locking groove 216 of the second insulating shell 21, the first elastic member 34 of the second locking hole 32 pushes the locking block 35 to be inserted into the locking groove 216 of the sliding seat 123.

[0086] As a specific embodiment of the present application, the transmission matching surfaces of the locking block 35 and the locking block 215 mentioned in the present application are all inclined surfaces, so that the corresponding locking block 35 can be directly pushed downward. The first elastic member 34 and the locking elastic member 214 are both U-shaped elastic structures.

[0087] As a further improvement of the present application, the first insulating shell 11 is provided with a circulation flow channel 4 communicating the first chamber 13 and the second chamber 14, and the circulation flow channel 4 is provided with a one-way ventilation structure 41 and a filter 42. The one-way ventilation structure 41 is used to limit the gas in the first chamber 13 from flowing into the second chamber 14 through the circulation flow channel 4.

[0088] In the process that the transition assembly 12 moves from the power-on point to the power-off point, it can squeeze the gas in the second chamber 14 into the first chamber 13 through the circulation flow channel 4, realizing the reuse of the gas in the first insulating shell 11, thereby reducing the operating cost of the present embodiment. At the same time, the filter 42 filters the gas flowing through the circulation flow channel 4 to prevent the dust generated by the electric arc in the second chamber 14 from entering the first chamber 13 along with the gas flow. In this way, when the first contact finger and the second contact finger are separated next time, the gas in the first chamber 13 will not carry dust to flow between them, thereby avoiding affecting the arc extinguishing effect of the gas flow.

[0089] In the present embodiment, the gas in the first insulating shell 11 is carbon dioxide. Of course, in other embodiments, the gas in the first insulating shell 11 can also be a gas arc-extinguishing gas.

[0090] In addition, through the arrangement of the one-way ventilation structure 41, in the process that the transition assembly 12 moves from the power-off point to the power-on point, the gas in the first chamber 13 can be limited to flow into the second chamber 14 through the circulation flow channel 4, and the gas in the first chamber 13 can be compressed.

[0091] In addition, the filter 42 is made of HEPA material, the first insulating shell 11 comprises an inner shell 16 and an outer shell 17 detachably connected to the inner shell 16, the inner shell 16 is provided with an air inlet hole and an air outlet hole, and the outer shell 17 and the inner shell 16 are spaced apart to form the circulation flow channel 4. The detachable design enables maintenance personnel to replace the filter 42 regularly.

[0092] As a further improvement of the application, the female connector 1 further comprises a conductive cylinder 5 and a conductive column 6 in sliding connection with the conductive cylinder 5, the first contact finger 121 is formed with an annular conductive wall 1211, and the conductive column 6 is connected with the conductive cylinder 5 through a second compression elastic member 51; the second compression elastic member 51 enables the conductive column 6 to have a tendency to move to the power-off point position;

[0093] When the transition assembly 12 is at the power-on point position, the separation point position, or any position between the two, the conductive column 6 is in contact with the conductive wall 1211;

[0094] When the transition assembly 12 is at the power-off point position, the conductive column 6 is separated from the conductive wall 1211.

[0095] When the male connector is inserted into the female connector and the transition assembly 12 is at the power-off point position, although the first contact finger 121 cooperates with the second contact finger 211, no effective electrical connection occurs at this time because the conductive column 6 is separated from the conductive wall 1211 at this time. Until the male connector continues to move the transition assembly 12 to the separation point position, the conductive column 6 and the conductive wall 1211 are in contact, the male connector and the female connector form an effective electrical connection, and the safety of the equipment is improved.

[0096] As a further improvement of the application, the first insulating shell 11 and the second insulating shell 21 are provided with a third compression elastic member 7, so that the second insulating shell 21 has a tendency to move away from the first insulating shell 11, the first insulating shell 11 is provided with a second locking bead 112, the second insulating shell 21 is provided with a limiting block 217, and the limiting block 217 is provided with a second wall 2171. When the limiting block 217 cooperates with the first insulating shell 11, the second locking bead 112 abuts against the second wall 2171.

[0097] The third compression elastic member 7 enables the first locking assembly 15 to quickly pull the second insulating shell 21 away from the first insulating shell 11 when the first locking assembly 15 is switched to the unlocked state, so that the second contact finger 211 is quickly separated.

[0098] The working process of pulling out the male connector is as follows:

[0099] The plug unlocking block 8 is pushed outside the first insulating shell 11, so that the plug unlocking cooperating block 81 clamped on the second insulating shell 21 and the first insulating shell 11 is separated from the insulating wall 82 of the second insulating shell 21, and the third compression elastic piece 7 drives the second insulating shell 21 to move from the power-on position to the power-off position. During the movement, the first locking assembly 15 is always in the locked state, thereby driving the piston 122 to move together, so that the piston 122 and the sliding seat 123 move away from each other, during which the tension spring 124 stores energy, and the gas in the second cavity 14 is extruded into the first cavity 13 through the circulating flow channel 4. In addition, the pusher 152 gradually moves away from the second insulating shell 21 under the action of the reset elastic piece 153, so that the first locking bead 154 gradually moves towards the edge of the push recess 1521, during which the first contact finger 121 and the second contact finger 211 always cover the gas injection hole 1513, and the pusher 152 does not cover the gas injection hole 1513. Figure 4 When the second insulating shell 21 moves to the separation position (as shown in the accompanying drawings), the second contact finger 211 has a certain speed of moving towards the power-off position under the driving of the second insulating shell 21, and at this time, the tension spring 124 has stored enough tension. At this time, the first locking bead 154 is misaligned with the push recess 1521, the first locking bead 154 is pushed towards the direction of the locking hole 213, the locking block 215 is pushed away from the first wall 1512, so that the first locking assembly 15 is switched to the unlocked state. At the moment when the first locking assembly 15 is switched to the unlocked state, the second contact finger 211 can continue to move towards the power-off position at a certain speed, while the first contact finger 121 is first stationary under the action of the tension spring 124, and then moves quickly towards the power-on position, realizing the quick separation of the first contact finger 121 and the second contact finger 211. At the same time, the first contact finger 121 and the second contact finger 211 move away from each other in opposite directions and no longer cover the gas injection hole 1513, so that the compressed gas in the first cavity 13 can be directly injected between the first contact finger 121 and the second contact finger 211 through the gas injection hole 1513, realizing the technical effect of full-automatic gas arc extinguishing.

[0100] With the second insulating shell 21 continuing to move to the power-off point under the action of the third compression spring 7, when the second insulating shell 21 pushes against the corresponding locking block 35, the locking block 35 drives the corresponding push block 36 to compress the liquid in the hydraulic pipeline 33, and then drives the locking block 35 of the second locking hole 32 to move downward to disengage from the locking groove 216 of the sliding seat 123, thereby unlocking the sliding seat 123. At this time, the pushing piece 152 moves to the farthest position under the action of the reset elastic piece 153, so that the pushing piece 152 covers the air injection hole 1513, thereby sealing the gas in the entire first insulating shell 11. Under the pushing of the first compression spring 125, the sliding seat 123 and the piston 122 are driven to move to the power-off point, and continue to squeeze the gas in the second chamber 14 into the first chamber 13, thereby realizing the reuse of the gas in the first insulating shell 11, thereby reducing the operating cost of the embodiment. At the same time, the filter piece 42 filters the gas flowing through the circulating flow channel 4 to prevent the dust generated by the electric arc in the second chamber 14 from entering the first chamber 13 along the gas flow. In this way, when the first contact finger 121 and the second contact finger 211 are separated next time, the gas in the first chamber 13 will not carry dust to flow between them, thereby avoiding affecting the arc extinguishing effect of the gas flow.

[0101] The working process of inserting the male plug is as follows:

[0102] The limiting block 217 on the second insulating shell 21 cooperates with the second locking bead 112 of the first insulating shell 11, thereby locking the connection relationship between the limiting block 217 and the first insulating shell 11. At the same time, the first locking assembly 15 is inserted into the insulating hole 212 of the second insulating shell 21, the first contact finger 121 and the second contact finger 211 are in contact, but the conductive column 6 does not contact the conductive wall 1211 of the second contact finger 211, so the male plug and the female plug are not powered on. The second insulating shell 21 drives the first locking assembly 15 and the piston 122 to move together from the power-off point to the separation point. During the movement, the volume of the second chamber 14 increases, the gas pressure decreases, the volume of the first chamber 13 decreases, and the gas pressure increases, so that when the subsequent air injection hole 1513 is opened, there is a high pressure difference to jet the first contact finger 121 and the second contact finger 211. At the same time, the top rod 111 abuts against the pushing piece 152 and pushes the pushing piece 152 to gradually approach the second insulating shell 21, thereby shortening the distance between the pushing groove 1521 and the first locking bead 154. When moving to the separation point, the first locking bead 154 falls into the pushing groove 1521, and the locking spring 214 pushes the locking block 215 to abut against the first wall 1512 to lock the connection between the first locking assembly 15 and the second insulating shell 21. At this time, the conductive wall 1211 is in contact with the conductive column 6 to realize the electrical connection of the male plug and the female plug. The second insulating shell 21 continues to move from the separation point to the power-on point, the conductive column 6 moves towards the direction of the conductive cylinder 5 to compress the second compression elastic piece 51, and drives the piston 122 and the sliding seat 123 to move to the power-on point.

[0103] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, but not limitation on the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An electrical connection terminal comprising a female terminal and a male terminal, characterized in that, The female connector comprises a first insulating shell, a transition assembly is slidably connected in the first insulating shell, and a first contact finger is arranged on the transition assembly; A power-off point and a power-on point are arranged on a moving track of the transition assembly, a first chamber is formed between an end of the transition assembly close to the power-on point and the first insulating shell, and a second chamber is formed between an end of the transition assembly close to the power-off point and the first insulating shell; The male connector can drive the transition assembly to reciprocate between the power-on point and the power-off point, the male connector comprises a second insulating shell, and a second contact finger matched with the first contact finger is arranged on the second insulating shell; In the process that the male connector drives the transition assembly to move towards the power-on point, the gas in the first chamber can be compressed; In the process that the male connector drives the transition assembly to move towards the power-off point, the gas in the first chamber can flow between the first contact finger and the second contact finger; The power-on point and the power-off point are provided with a separation point, when the transition assembly moves to the separation point, the second contact finger keeps moving towards the power-off point, and the first contact finger has a tendency to move towards the power-on point; The first insulating shell and the transition assembly are provided with a first locking assembly, the first locking assembly has a locked state and an unlocked state, when the first locking assembly is in the locked state, the second insulating shell and the transition assembly are connected as a whole; When the first locking assembly is in the unlocked state, the second insulating shell and the transition assembly can be separated; When the second insulating shell and the transition assembly move between the power-on point and the separation point, the first locking assembly is in the locked state; The first locking assembly comprises a locking cylinder, a pushing piece slidably arranged in the locking cylinder, a reset elastic piece connected to the locking cylinder and the pushing piece, and a first locking bead, the locking cylinder is provided with a locking through hole for placing the first locking bead, the locking through hole is provided with a first wall, and the pushing piece is provided with a pushing groove; The second insulating shell is provided with an insulating hole for inserting the locking cylinder, an inner wall of the insulating hole is provided with a locking hole, and the locking hole is provided with a locking elastic piece and a locking block; The first insulating shell is connected with a top rod located on a moving track of the pushing piece; In the process that the male connector drives the transition assembly to move from the power-off point to the separation point, the top rod abuts against the pushing piece and pushes the pushing piece to be close to the second insulating shell, when the transition assembly is at the separation point, the first locking bead enters the pushing groove in correspondence with the pushing groove and the first locking bead, and the locking elastic piece drives the locking block to abut against the first wall to lock the movement of the locking cylinder; The transition assembly comprises a piston and a sliding seat, the sliding seat is located at an end of the piston close to the power-on point, a tension spring is arranged between the sliding seat and the piston, a first compression spring is connected between the sliding seat and the first insulating shell, and the first compression spring makes the sliding seat have a tendency to move towards the power-off point; The first insulating shell is provided with a second locking assembly acting on the sliding seat, and the second locking assembly has a locked state and an unlocked state; When the second locking assembly is in the locked state, the second locking assembly locks the sliding seat at the power-on point; When the second locking assembly is in the unlocked state, the sliding seat keeps a tendency to move towards the power-off point; When the piston moves to the power-off point, the second locking assembly is in the unlocked state; At the moment when the first locking assembly switches to the unlocked state, the second contact finger can continue to move towards the power-off point at a certain speed, while the first contact finger is first stationary under the action of the tension spring and then quickly moves towards the power-on point.

2. An electrical connection terminal according to claim 1, wherein The side wall of the locking cylinder is provided with a jet hole; During the movement of the transition assembly from the separation point to the power-off point, the jet hole is in an open state; When the transition assembly is in the power-on point or the power-off point, the jet hole is in a closed state.

3. An electrical connection terminal according to claim 1, wherein The second locking assembly comprises a first lock hole on the moving track of the second insulating shell and a second lock hole on the moving track of the sliding seat, the first lock hole and the second lock hole are communicated through a hydraulic pipeline, and each of the first lock hole and the second lock hole is provided with a first elastic member, a locking block and a push block matched with the locking block, the push block is sealingly and slidingly arranged in the hydraulic pipeline; The second insulating shell and the sliding seat are each provided with a locking groove into which the locking block is inserted; During the movement of the piston from the separation point to the power-off point, the second insulating shell pushes the corresponding locking block to make it disengage from the locking groove of the second insulating shell, the locking block drives the push block to compress the liquid in the hydraulic pipeline, and then drives the locking block of the second lock hole to disengage from the locking groove of the sliding seat to unlock the sliding seat; When the locking block of the first lock hole is inserted into the locking groove of the second insulating shell, the first elastic member of the second lock hole pushes the locking block to be inserted into the locking groove of the sliding seat.

4. An electrical connection terminal according to claim 1, wherein The first insulating shell is provided with a circulating flow channel communicating the first chamber and the second chamber, the circulating flow channel is provided with a one-way ventilation structure and a filter element, and the one-way ventilation structure is used to limit the gas in the first chamber to flow into the second chamber through the circulating flow channel.

5. An electrical connection terminal according to claim 1, wherein The female connector further comprises a conductive cylinder and a conductive column in sliding connection with the conductive cylinder, an annular conductive wall is formed on the first contact finger, and a second compression elastic member is connected between the conductive column and the conductive cylinder; the second compression elastic member makes the conductive column have a tendency to move towards the power-off point; When the transition assembly is in the power-on point, the separation point and any position between the two, the conductive column is in contact with the conductive wall; When the transition assembly is in the power-off point, the conductive column is separated from the conductive wall.

6. An electrical connection terminal according to claim 1, wherein A third compression elastic member is arranged between the first insulating shell and the second insulating shell, so that the second insulating shell has a tendency to move away from the first insulating shell, a second locking bead is arranged on the first insulating shell, a limiting block is sleeved on the second insulating shell, a second wall is arranged on the limiting block, and when the limiting block is matched with the first insulating shell, the second locking bead abuts against the second wall.

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