Electrical connection device

Abstract

The invention relates to an electric connection device which comprises a bridge-type contact, and a busbar socket and a cutter body socket which can be elastically clamped are formed on the two sides of the bridge-type contact respectively. An upper support and a lower support, the upper support is installed on the contact above the knife body socket, the lower support is installed on the contact below the knife body socket, a guide socket is formed between the upper support and the lower support, and the guide socket is located on the front side of the knife body socket; the two sides of the upper support are respectively provided with an upper abutting portion, the two sides of the lower support are respectively provided with a lower abutting portion, and the upper abutting portion and the lower abutting portion on the same side correspond to each other up and down. The two guide top plates are fixed to the two sides of the body slotting tool respectively, the upper side and the lower side of the front end of each guide top plate are each provided with a guide protruding block, and each guide protruding block is provided with a front inclined guide face and a rear inclined guide face. Friction loss between the body slotting tool and the bridge type contact is reduced, and the service life of the electric connection device is prolonged.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker switches, and more specifically to an electrical connection device. Background Technology

[0002] Temperature rise is a crucial performance indicator for circuit breakers, impacting their safe operation and energy conservation. The contact area between conductive connectors directly affects contact resistance and heat conduction rate, both positively correlated. Therefore, making bridge-type contacts into flexible connections increases the contact area, transforming traditional line contact into surface contact, which reduces circuit breaker temperature rise. However, this introduces a problem: significantly increased friction between the flexible connection and the main body's insert blades, leading to increased operating force on the drawer seat. Currently, mainstream technologies in the market all have certain drawbacks.

[0003] Currently, electrical connection devices that use direct hard insertion of the circuit breaker body's insert blade pose a risk of cracking and delamination because the flexible connector is made of welded copper sheets. Secondly, electrical connection devices that use a pre-insertion and then clamping method lack relative friction between the flexible connector and the body insert blade during the connection process. This fails to address the issue of dust / oxide buildup on the surfaces of the two conductive connectors after prolonged periods of disuse, which increases the circuit breaker's circuit resistance, leading to increased temperature rise and energy consumption. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an electrical connection device that solves the technical problem of high friction and easy wear between the main body blade and the bridge contact during the insertion of the main body blade into the bridge contact in the circuit breaker.

[0005] The technical solution adopted by this invention to solve its technical problem is: An electrical connection device is provided, comprising: The bridge-type contact has a busbar socket and a knife body socket on its two sides, which can be elastically clamped. An upper bracket and a lower bracket are provided. The upper bracket is mounted on a contact above the blade insertion port, and the lower bracket is mounted on a contact below the blade insertion port. A guide port is formed between the upper bracket and the lower bracket and is located in front of the blade insertion port. The upper support is provided with upper abutment parts on both sides, and the lower support is provided with lower abutment parts on both sides, with the upper abutment parts and lower abutment parts on the same side corresponding vertically. A pair of guide top plates are fixed on both sides of the main body inserter. Guide protrusions are provided on the upper and lower sides of the front end of the guide top plates. The guide protrusions are provided with a front inclined guide surface and a rear inclined guide surface. When the main body inserter passes through the guide port and is inserted into the cutter body port, the two guide top plates first abut against the upper and lower abutment parts on the same side via the two front inclined guide surfaces, thereby causing the guide port and the cutter body port to gradually open. Then the main body inserter is inserted into the cutter body port. As the rear inclined guide surface contacts the upper and lower abutment parts, it causes the cutter body port to close and gradually clamp the main body inserter.

[0006] Furthermore, the rear sides of both the upper and lower supports abut against the support frame of the bridge-type contact. When the guide plate abuts against the upper and lower supports, the support frame of the bridge-type contact supports the upper and lower supports from the rear.

[0007] Furthermore, both the upper support and the lower support include a middle plate and a pair of ear plates. The two ear plates are connected to the middle plate to form a U-shaped structure, and the abutment part is disposed on the ear plates. A hook plate is provided on the intermediate plate, and a hook groove is opened at the front end of the contact. When the front end of the contact is inserted into the U-shaped opening of the bracket, the hook groove at the front end of the contact cooperates with the hook plate. The two sides of the contact are connected to the ear plate by the first screw. The rear side of the ear plate is provided with a first support surface for abutting against the support frame of the bridge-type contact, and the first support surface is an arc structure.

[0008] Furthermore, the abutting part is an abutting block or a roller, and the roller is mounted on the ear plate by a wheel axle.

[0009] Furthermore, the guide protrusion is provided with a flat guide surface, which is located between the front inclined guide surface and the rear inclined guide surface. When the guide top plate contacts the abutment part through the flat guide surface, the opening distance between the guide socket and the knife body socket remains unchanged.

[0010] Furthermore, the guide top plate and the main body insert are connected and fixed by a second screw. The guide top plate is provided with at least one positioning protrusion, and the main body insert is provided with at least one positioning groove. The positioning protrusion and the positioning groove cooperate with each other.

[0011] Furthermore, limiting bosses are respectively provided on the upper and lower supports, and the limiting bosses cooperate with the base frame of the circuit breaker to limit the amplitude of contact swing.

[0012] Furthermore, the bridge-type contact includes The support frame is a "U"-shaped structure, with an upper mounting opening at the upper end and a lower mounting opening at the lower end; The upper flexible conductor, the upper spring sheet, and the upper pressure rod are all set inside the upper mounting opening. The rigid contacts at both ends of the upper flexible conductor are supported by the front and rear support edges inside the upper mounting opening. The two ends of the upper pressure rod pass through the upper mounting opening. The upper pressure rod presses against the middle of the upper spring sheet. The front and rear ends of the upper spring sheet elastically press against the front and rear rigid contacts respectively. Multiple upper heat dissipation grooves are formed on the upper flexible conductor. The upper heat dissipation grooves extend from the front hard contact of the upper flexible conductor to the rear hard contact. Each upper heat dissipation groove divides the front end of the upper flexible conductor into multiple upper contact units. The lower flexible conductor, the lower spring sheet, and the lower pressure rod are all set inside the lower mounting opening. The rigid contacts at both ends of the lower flexible conductor are supported by the front and rear support edges inside the lower mounting opening. The two ends of the lower pressure rod pass through the lower mounting opening. The lower pressure rod presses against the middle of the lower spring sheet. The front and rear ends of the lower spring sheet elastically press against the front and rear rigid contacts respectively. Multiple heat dissipation grooves are formed on the lower flexible conductor. The lower heat dissipation grooves extend from the front rigid contact of the lower flexible conductor to the rear rigid contact. Each lower heat dissipation groove divides the front end of the lower flexible conductor into multiple lower contact units. The upper flexible connector conductor is provided with an upper positioning structure at the upper mounting port, and the upper positioning structure restricts the upper flexible connector conductor from moving back and forth at the upper mounting port. The lower flexible connector conductor is provided with a lower positioning structure at the lower mounting port, and the lower positioning structure restricts the lower flexible connector conductor from moving back and forth at the lower mounting port. A blade insertion port is formed between the two hardened contacts at the front end, and a hook groove is formed on the two hardened contacts at the front end; A busbar socket is formed between the two rigid contacts at the rear end; The upper and lower supports are respectively mounted on two rigid contacts at the front end. The ear plate of the upper support abuts against the ear plate of the lower support to control the opening distance of the blade insertion port.

[0013] Furthermore, the upper positioning structure includes Multiple upper positioning strips are distributed on the front and rear support sides inside the upper mounting opening, with the upper positioning strips on the front and rear support sides corresponding to each other. Multiple upper positioning holes are provided, each of which is located within the upper heat dissipation slot. The distribution of each upper positioning hole corresponds to the distribution of each upper positioning strip, and each upper positioning strip passes through each upper positioning hole. The lower positioning structure includes Multiple lower positioning strips are distributed on the front and rear support sides inside the lower mounting opening, with the lower positioning strips on the front and rear support sides corresponding to each other. Multiple lower positioning holes are provided, each of which is located within the lower heat dissipation slot. The distribution of each lower positioning hole corresponds to the distribution of each lower positioning strip, and each lower positioning strip passes through its respective lower positioning hole.

[0014] Furthermore, the bridge-type contact includes The support frame is a "U"-shaped structure, with an upper mounting opening at the upper end and a lower mounting opening at the lower end; The upper contact assembly and the lower contact assembly are respectively installed in the upper mounting port and the lower mounting port. The front end of the upper contact assembly and the lower contact assembly forms a blade insertion port, and the rear end forms a busbar insertion port. Both the upper and lower contact groups have hook grooves at their front ends; The two ends of the upper bracket are respectively connected to the upper contact screws located on both sides of the upper contact assembly; The two ends of the lower bracket are respectively connected to the lower contact screws located on both sides of the lower contact assembly.

[0015] The beneficial effects of this invention are: In the electrical connection device of the present invention, when the main body insert is inserted into the bridge-type contact, the two supports can be opened by the guide top plate in advance, so that the insert opening is opened in advance, avoiding the main body insert directly pressing against the inner wall surface of the insert opening. As the main body insert is inserted to a certain depth, the insert opening gradually clamps the main body insert. During the clamping process, relative friction occurs between the insert opening and the main body insert, removing the oxide layer / dust on the surface of both, solving the problem that dust / oxide layer appears on the surface of the two conductive connectors after they have not been connected for a long time, which increases the temperature rise and energy consumption of the circuit breaker.

[0016] The insert blade of the main body uses the guide plate to cooperate with the abutting rollers on the two brackets. During the entire insertion / removal process, the rollers roll on the surface of the guide protrusion. Compared with the original soft connection and the friction between the surfaces of the insert blade, the friction is greatly reduced, thereby greatly reducing the operating force of the drawer seat during this process.

[0017] When a flexible conductor is used on the support frame of the bridge-type contact, during the insertion of the inserter into the bridge-type contact, the guide plate abuts against the upper and lower supports, allowing the support frame of the bridge-type contact to rest against the two supports, preventing the upper and lower flexible conductors in the bridge-type contact from moving backward. During the removal of the inserter, the positioning strip on the support engages with the positioning hole in the flexible conductor, restricting the flexible conductor from being dragged forward. Attached Figure Description

[0018] The invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the electrical connection device; Figure 2 This is a schematic diagram of the upper and lower support brackets; Figure 3 and Figure 4 This is a diagram of the upper support; Figure 5 This is a schematic diagram of a bridge-type contact using a flexible connection; Figure 6 This is a schematic diagram of the bridge-type contact after the bracket is installed; Figure 7This is a schematic diagram of the inserter body; Figure 8 This is a schematic diagram of the support frame; Figure 9 This is a schematic diagram of the upper flexible connector conductor and the lower flexible connector conductor; Figure 10 This is a schematic diagram of a bridge-type contact mounted on a base frame; Figure 11 This is a schematic diagram of a bridge-type contact using contact plates; Figure 12 This is a schematic diagram of the bridge-type contact after the bracket is installed; Among them, 1 is a bridge-type contact, 11 is a support frame, 111A is an upper positioning bar, 111B is a lower positioning bar, 12A is an upper flexible conductor, 12B is a lower flexible conductor, 12′A is an upper contact piece group, and 12′B is a lower contact piece group. 121A, Upper heat dissipation slot; 121B, Lower heat dissipation slot; 122A, Upper positioning hole; 122B, Lower positioning hole; 13, Hook groove; 2. Body inserter; 21. Second screw; 3. Guide top plate; 31. Front inclined guide surface; 32. Flat guide surface; 33. Rear inclined guide surface; 4A. Upper bracket, 4B. Lower bracket, 41. Middle plate, 411. Hook plate, 42. Ear plate, 421. First support surface, 422. Second support surface, 43. Limiting boss, 44. Roller. 5. First screw; 6. Base frame. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] This application provides an electrical connection device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0022] To address the technical problem of high friction and easy wear between the main body insert and the bridge-type contact during the insertion of the insert into the bridge-type contact in existing circuit breakers, an embodiment of this application provides an electrical connection device. This is described in detail below.

[0023] like Figures 1 to 9 As shown, an electrical connection device includes... The bridge-type contact 1 has a busbar socket and a knife body socket that can be elastically clamped on both sides. The upper bracket 4A and the lower bracket 4B are provided. The upper bracket 4A is installed on the contact above the blade insertion port, and the lower bracket 4B is installed on the contact below the blade insertion port. A guide port is formed between the upper bracket 4A and the lower bracket 4B. The guide port is located in front of the blade insertion port. The upper support 4A is provided with upper abutment parts on both sides, and the lower support 4B is provided with lower abutment parts on both sides. The upper abutment parts and lower abutment parts on the same side correspond vertically. A pair of guide top plates 3 are fixed on both sides of the main body inserter 2. Guide protrusions are provided on the upper and lower sides of the front end of the guide top plates 3. The guide protrusions are provided with a front inclined guide surface 31 and a rear inclined guide surface 33. When the main body insert 2 passes through the guide port and is inserted into the cutter body port, the two guide top plates 3 respectively abut against the upper and lower abutment parts on the same side via the two front inclined guide surfaces 31, thereby driving the guide port and the cutter body port to gradually open. Then the main body insert 2 is inserted into the cutter body port. As the rear inclined guide surface 33 contacts the upper and lower abutment parts, it drives the cutter body port to close and gradually clamps the main body insert 2.

[0024] In practical use, bridge-type contact 1 exists in two forms: one is to use a soft connection, and the other is to use a contact piece group composed of multiple contact pieces. Taking the bridge-type contact using a soft connection as an example, the following is a detailed explanation.

[0025] Specifically, as an optional implementation method in this embodiment, such as Figure 1 , Figure 5 , Figure 6 Figure 8 as well as Figure 9 As shown, the bridge-type contact 1 includes The support frame 11 has an "U"-shaped structure, with an upper mounting opening at the upper end and a lower mounting opening at the lower end. The upper flexible conductor 12A, the upper spring sheet, and the upper pressure rod are all set in the upper mounting port. The rigid contacts at both ends of the upper flexible conductor 12A are supported by the front and rear support edges in the upper mounting port. The two ends of the upper pressure rod pass through the upper mounting port. The upper pressure rod presses against the middle of the upper spring sheet. The front and rear ends of the upper spring sheet elastically press against the front and rear rigid contacts respectively. like Figure 9 As shown, multiple upper heat dissipation grooves 121A are formed on the upper flexible conductor 12A. The upper heat dissipation grooves 121A extend from the front hard contact of the upper flexible conductor 12A to the rear hard contact. Each upper heat dissipation groove 121A divides the front end of the upper flexible conductor 12A into multiple upper contact units. The lower flexible conductor 12B, the lower spring sheet, and the lower pressure rod are all set in the lower mounting port. The rigid contacts at both ends of the lower flexible conductor 12B are supported by the front and rear support edges in the lower mounting port. The two ends of the lower pressure rod pass through the lower mounting port and press against the middle of the lower spring sheet. The front and rear ends of the lower spring sheet elastically press against the front and rear rigid contacts respectively. like Figure 9 As shown, multiple lower heat dissipation grooves 121B are formed on the lower flexible conductor 12B. The lower heat dissipation grooves 121B extend from the front hard contact of the lower flexible conductor 12B to the rear hard contact. Each lower heat dissipation groove 121B divides the front end of the lower flexible conductor 12B into multiple lower contact units. The upper flexible connector conductor 12A is provided with an upper positioning structure at the upper mounting port, and the upper positioning structure restricts the upper flexible connector conductor 12A from moving back and forth at the upper mounting port. The lower flexible connector conductor 12B is provided with a lower positioning structure at the lower mounting port, and the lower positioning structure restricts the lower flexible connector conductor 12B from moving back and forth at the lower mounting port. In this embodiment, as Figure 9 As shown, a blade insertion port is formed between the two front-end hard contacts, and a hook groove 13 is provided on the two front-end hard contacts; In this embodiment, a busbar socket is formed between the two rigid contacts at the rear end; the busbar is inserted into the busbar socket and then locked by a pair of locking bolts passing through it.

[0026] Because the flexible conductor is flexible, in order to ensure that the blade insertion port has a certain and stable initial opening distance, the ear plate 42 of the upper bracket 4A and the ear plate 42 of the lower bracket 4B abut against each other.

[0027] For the bridge-type contact 1 with flexible connection, the opening spacing size is determined. Only after the opening spacing size is determined can the spacing between the two upper and lower front inclined guide surfaces 31 and the two upper and lower rear inclined guide surfaces 33 be further controlled to ensure that the guide top plate 3 can be inserted.

[0028] like Figure 9 As shown, the heat dissipation grooves on the flexible conductor divide the flexible conductor into multiple contact units, reducing the flatness requirement of the entire flexible conductor. Each contact unit is provided with pressure by a spring sheet, so that it can better fit with the plane of the body insert 2, thereby further reducing the contact resistance.

[0029] Specifically, as an optional implementation method in this embodiment, such as Figure 8 and Figure 9 As shown, the upper positioning structure includes Multiple upper positioning strips 111A are distributed on the front and rear support sides inside the upper mounting opening, and the upper positioning strips 111A on the front and rear support sides correspond to each other. Multiple upper positioning holes 122A are respectively opened in the upper heat dissipation groove 121A. The distribution of each upper positioning hole 122A corresponds to each upper positioning strip 111A. Each upper positioning strip 111A passes through each upper positioning hole 122A. like Figure 8 and Figure 9 As shown, the lower positioning structure includes Multiple lower positioning strips 111B are distributed on the front and rear support sides inside the lower mounting opening, and the lower positioning strips 111B on the front and rear support sides correspond to each other. Multiple lower positioning holes 122B are provided, each lower positioning hole 122B is opened in the lower heat dissipation groove 121B, the distribution of each lower positioning hole 122B corresponds to each lower positioning strip 111B, and each lower positioning strip 111B passes through each lower positioning hole 122B.

[0030] Both the upper positioning hole 122A and the lower positioning hole 122B are rectangular holes, and both the upper positioning strip 111A and the lower positioning strip 111B are rectangular strips. After the positioning strips are inserted into the positioning holes, they serve to block the positioning flexible connector conductor and prevent the main body inserter 2 from being dragged forward during the pulling process.

[0031] The flexible conductor is a mature product. It consists of multiple layers of copper sheets stacked together, and the two ends are formed by heat fusion to form a rigid contact. The flexible conductor still retains multiple layers of copper sheets in the middle to form the flexible part. It is precisely because the rigid contact of the flexible conductor is formed by heat fusion of copper sheets that when the inserter is directly inserted into the bridge contact 1 in the past, the inserter directly rubs against the rigid contact, and the bonding layer of the rigid contact has the risk of cracking and delamination.

[0032] The positioning holes are made on the rigid contact parts at the front or rear end of the flexible connector conductor, and their positions correspond to the heat sink.

[0033] Specifically, as an optional implementation method in this embodiment, such as Figure 6 As shown, the rear sides of the upper bracket 4A and the lower bracket 4B abut against the support frame 11 of the bridge contact 1. When the guide plate 3 abuts against the upper bracket 4A and the lower bracket 4B, the support frame 11 of the bridge contact 1 supports the upper bracket 4A and the lower bracket 4B from the rear.

[0034] Before the main body insert 2 is inserted, there is a small gap between the bracket and the support frame 11. This gap is sufficient to allow the bracket to rotate slightly up and down relative to the support frame 11. This is because when the upper and lower brackets are opened with the insert of the insert body, the bracket will rotate slightly. This rotation angle is relatively small and can be ignored, but the gap between the bracket and the support frame 11 needs to be maintained. When the main body insert 2 is inserted, the guide plate 3 first pushes against the bracket. At this time, the bracket directly transmits the force to the rear support frame 11, thereby preventing the two flexible conductors on the support frame 11 from moving backward and improving the stability during inserting the insert.

[0035] Specifically, as an optional implementation method in this embodiment, such as Figures 2 to 4 As shown, both the upper support 4A and the lower support 4B include a middle plate 41 and a pair of ear plates 42. The two ear plates 42 are connected to the middle plate 41 to form a U-shaped structure, and the abutting part is disposed on the ear plates 42. The intermediate plate 41 is provided with a hook plate 411, and the front end of the contact is provided with a hook groove 13. When the front end of the contact is inserted into the U-shaped opening of the bracket, the hook groove 13 at the front end of the contact cooperates with the hook plate 411. The two sides of the contact are connected to the ear plate 42 by a first screw 5. The rear side of the ear plate 42 is provided with a first support surface 421 for abutting against the support frame 11 of the bridge-type contact 1. The first support surface 421 has an arc structure. The arc structure of the first support surface 421 is mainly to facilitate the rotation of the support.

[0036] In this embodiment, the hook groove 13 extends laterally through the front end face of the flexible connector conductor, and the hook plate 411 is formed by bending the intermediate plate 41. A moving gap is maintained between the hook plate 411 and the ear plate 42. This gap is mainly for the guide top plate 3 on the main body insert 2 to pass through.

[0037] The ear plate 42 is provided with a second support surface 422, which is a plane. The upper and lower brackets support each other through the second support surface 422, thereby controlling the opening distance of the guide socket.

[0038] In this embodiment, as Figures 2 to 4 As shown, the upper edge of the intermediate plate 41 is an arched structure with a high center and low sides. The upper edge is positioned opposite to the hook plate 411. The arched structure at the upper end of the intermediate plate 41 can convert the vertical load applied by the spring sheet in the bridge-type contact 1 into axial pressure along the arch surface, thereby improving the bending resistance under long spans while saving materials and space (strengthening the middle load-bearing area and reducing materials on both sides).

[0039] Specifically, the abutting part is an abutting block or a roller 44, and the roller 44 is mounted on the ear plate 42 by means of a wheel axle.

[0040] As an optional implementation method in this embodiment, such as Figures 2 to 4 As shown, the abutment part preferably has a roller 44, and the axle is fixed to the ear plate 42 by welding or riveting. The roller 44 can reduce the friction between the bracket and the guide protrusion, making it easier to insert and remove the guide top plate 3.

[0041] The roller 44 can be disposed on the outside of the ear plate 42 or on the inside of the ear plate 42. In this embodiment, the roller 44 is disposed on the inside of the ear plate 42 and is located between the ear plate 42 and the side of the contact.

[0042] Specifically, a mounting edge is formed on the ear plate 42, which is used to abut against the side of the flexible connector conductor, so that the first screw passes through the mounting edge and connects to the flexible connector conductor. The mounting edge is formed on the ear plate 42 by bending. The mounting position of the abutment part on the ear plate 42 needs to avoid the mounting edge, and the mounting surface of the abutment part is not on the same plane as the mounting edge.

[0043] Specifically, as an optional implementation method in this embodiment, such as Figures 2 to 4 As shown, limiting bosses 43 are respectively provided on the upper bracket 4A and the lower bracket 4B. The limiting bosses 43 cooperate with the base frame 6 of the circuit breaker to limit the amplitude of contact swing.

[0044] like Figure 10 As shown, the mounting hole of the base frame 6 is provided with four ribs. After the bridge contact 1 is installed on the base frame 6, the two brackets on the bridge contact 1 and a total of four limiting protrusions 43 will cooperate with the four ribs in the mounting hole to control the swing amplitude of the front end of the two flexible conductors.

[0045] The bracket is equipped with a limiting boss 43, which, in conjunction with the ribs of the base frame 6, can limit the swing amplitude of the flexible connection end, prevent positional changes caused by spring force or vibration, ensure that it is within the predetermined range where the inserter 2 can be smoothly aligned and inserted, and reduce the operational risk of difficulty in inserting the inserter.

[0046] like Figure 10 As shown, the electrical connection device is installed in the base frame 6 and can be installed vertically or horizontally.

[0047] Specifically, as an optional implementation method in this embodiment, such as Figure 7 As shown, the guide protrusion is provided with a flat guide surface 32, which is located between the front inclined guide surface 31 and the rear inclined guide surface 33. When the guide top plate 3 contacts the abutment part through the flat guide surface 32, the opening distance between the guide socket and the knife body socket remains unchanged.

[0048] The length of the flat guide surface 32 affects the depth to which the body inserter 2 is inserted into the bridge contact 1, and the final depth is determined by the overall structure.

[0049] Specifically, as an optional implementation method in this embodiment, such as Figure 7 As shown, the guide plate 3 and the main body insert 2 are connected and fixed by a second screw 21. The guide plate 3 is provided with two positioning protrusions, and the main body insert 2 is provided with two positioning grooves. The positioning protrusions cooperate with the positioning grooves.

[0050] The guide top plate 3 adopts this installation structure, which is simple, convenient, and structurally stable and reliable.

[0051] like Figure 1 and Figure 10 As shown, when the electrical connection device makes an electrical connection, the main body insert 2 is inserted. Before the flexible connector conductor contacts the main body insert 2, the roller 44 first rolls and climbs on the front inclined guide surface 31. The bracket drives the front end of the flexible connector conductor to open outward through the hook plate 411. Then the roller 44 rolls a distance on the flat guide surface 32. Before this, the flexible connector conductor and the main body insert 2 do not come into contact. As the main body insert 2 continues to enter, the roller 44 slowly rolls down on the rear inclined guide surface 33. At this time, the flexible connector conductor and the main body insert 2 come into contact and relative friction occurs. Since the contact process occurs as the roller 44 moves on the rear inclined guide surface 33, the contact depth between the main body insert 2 and the flexible connector conductor is proportional to the insertion depth of the main body insert 2. The surfaces of the flexible connector conductor and the main body insert 2 rub against each other, removing the oxide layer / dust from their surfaces. This solves the problem of dust / oxide layer appearing on the surface of the two flexible connector conductors after they have not been connected for a long time, which increases the temperature rise and energy consumption of the circuit breaker.

[0052] After the main body inserter 2 is inserted, the roller 44 remains on the rear inclined guide surface 33 and does not come into contact with the guide top plate 3.

[0053] When the main body insert 2 retracts, relative friction occurs between the main body insert 2 and the flexible connector conductor. As the roller 44 rolls and climbs on the rear inclined guide surface 33, the hook plate 411 drives the front end of the flexible connector conductor to open outward, and the surfaces of the flexible connector conductor and the main body insert 2 gradually separate. As the main body insert 2 continues to retract, the roller 44 rolls on the flat guide surface 32 and then rolls down on the front inclined guide surface 31. After the surfaces of the flexible connector conductor and the main body insert 2 separate, there is no longer relative friction between them during the subsequent retraction process.

[0054] After the main body insert 2 is withdrawn, the upper bracket 4A and the lower bracket 4B are supported by the ear plate 42, thereby maintaining a fixed distance between the inserts of the insert body.

[0055] Compared to electrical connection devices that require insertion followed by clamping, this electrical connection device solves the problem of increased temperature rise and energy consumption when the circuit breaker is in standby mode for an extended period of time.

[0056] The electrical connection device in this embodiment, through the guide ramp on the guide protrusion and the roller 44 on the bracket, enables opening before insertion, making the soft connection less prone to damage and improving the service life of the drawer seat.

[0057] The following provides another embodiment of the bridge-type contact, in which the bridge-type contact does not use a flexible connection, but instead uses a conventional contact plate structure. For details, please refer to the prior patent, CN115458345A Heat-dissipating power switch cabinet contact.

[0058] like Figure 11 and Figure 12 As shown, the bridge-type contact 1 includes The support frame 11 has an "U"-shaped structure, with an upper mounting opening at the upper end and a lower mounting opening at the lower end. Upper contact group 12′A and lower contact group 12′B are respectively installed in upper mounting port and lower mounting port. The front end of the upper contact group 12′A and the lower contact group 12′B forms a knife body insertion port and the rear end forms a busbar insertion port. Both the upper contact group 12′A and the lower contact group 12′B have a hook groove 13 at their front ends; The two ends of the upper bracket 4A are respectively connected to the upper contact screws located on both sides of the upper contact assembly 12′A; The two ends of the lower bracket 4B are respectively connected to the lower contact screws located on both sides of the lower contact assembly 12′B.

[0059] The upper contact group 12′A consists of multiple upper contact pieces, and the lower contact group 12′B consists of multiple lower contact pieces. Both the upper and lower contact pieces are provided with a locking slot, which is used to engage with the support frame 11. After the contact piece is engaged through the locking slot, it can restrict the contact piece from moving back and forth on the support frame 11.

[0060] In this embodiment, the upper contact group 12′A and the lower contact group 12′B have the same structure, both including a pressure rod and a spring. For details, please refer to the prior patent.

[0061] In this embodiment, the contact piece of the bridge contact 1 is rigid, while in the above embodiment, the bridge contact 1 is flexible. This results in some differences in the actual installation structure of the upper bracket 4A and the lower bracket 4B.

[0062] In the bridge-type contact 1 using a flexible connection, the upper bracket 4A and the lower bracket 4B need to support each other, that is, the two brackets are supported by the second support surface 422 to control the opening distance of the guide socket. However, in this embodiment, the upper bracket 4A and the lower bracket 4B do not need to be supported because the upper and lower contacts are rigid block structures. The upper bracket 4A and the lower bracket 4B are respectively fixed directly to the front end of their respective contacts using the first screw 5, and the hook plate 411 and the hook groove 13 are properly engaged. At this time, the opening distance of the guide socket is already determined.

[0063] When the inserter 2 is inserted, the guide plate 3 pushes the bracket backward, and the bracket and the contact are subjected to backward force together. At this time, the support frame 11 of the bridge contact 1 also supports the upper bracket 4A and the lower bracket 4B, avoiding the contact being subjected to force alone, improving the stability of the contact and the service life of the drawer seat.

[0064] When the main body inserter 2 is pulled out, the guide plate 3 moves forward with the upper bracket 4A and the lower bracket 4B. At this time, the contact piece is supported by the bayonet support 11, which restricts the forward movement of the contact, so that the main body inserter 2 can be pulled out smoothly.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electrical connection device, characterised in that, The bridge type contact is provided with a female busbar insertion port and a blade body insertion port on both sides, which can be elastically clamped; An upper support and a lower support are arranged on the contact above and below the blade body insertion port, respectively, and a guide insertion port is formed between the upper support and the lower support, and the guide insertion port is located in front of the blade body insertion port; The upper support is provided with upper abutting portions on both sides, and the lower support is provided with lower abutting portions on both sides, and the upper abutting portions and the lower abutting portions on the same side correspond to each other in an up-down manner; A pair of guide top plates are fixed on both sides of the body blade, and the guide top plates are provided with guide protrusions on the upper side and the lower side of the front end, and the guide protrusions are provided with front inclined guide surfaces and rear inclined guide surfaces; When the body blade passes through the guide insertion port and is inserted into the blade body insertion port, the two guide top plates abut against the upper abutting portions and the lower abutting portions on the same side through the two front inclined guide surfaces, so as to drive the guide insertion port and the blade body insertion port to be gradually opened, and then the body blade is inserted into the blade body insertion port, and when the rear inclined guide surfaces contact the upper abutting portions and the lower abutting portions, the blade body insertion port is driven to be closed and gradually clamped on the body blade.

2. The electric connection device according to claim 1, characterized in that the rear sides of the upper support and the lower support abut against the support frame of the bridge type contact, and when the guide top plates abut against the upper support and the lower support, the support frame of the bridge type contact supports the upper support and the lower support from the rear side. The upper support and the lower support each comprise an intermediate plate and a pair of ear plates, the two ear plates and the intermediate plate are connected to form a U-shaped structure, and the abutting portions are arranged on the ear plates; 3. An electrical connection device according to claim 2, characterised in that the intermediate plate is provided with a hook plate, the front end of the contact is provided with a hook groove, and when the front end of the contact is inserted into the U-shaped port of the support, the hook groove of the front end of the contact cooperates with the hook plate, and the two sides of the contact are connected with the ear plates by the first screw; the rear side of the ear plate is provided with a first supporting surface for abutting against the support frame of the bridge type contact, and the first supporting surface is a circular arc structure.

4. The electric connection device according to claim 1, characterized in that the abutting portions are abutting blocks or rollers, and the rollers are installed on the ear plates by shafts.

5. The electric connection device according to claim 1, characterized in that the guide protrusions are provided with flat guide surfaces between the front inclined guide surfaces and the rear inclined guide surfaces, and when the guide top plates contact the abutting portions through the flat guide surfaces, the opening distance of the guide insertion port and the blade body insertion port remains unchanged.

6. The electric connection device according to claim 1, characterized in that the guide top plates and the body blade are connected and fixed by a second screw, the guide top plates are provided with at least one positioning protrusion, and the body blade is provided with at least one positioning groove, and the positioning protrusion cooperates with the positioning groove.

7. The electric connection device according to claim 1, characterized in that the upper support and the lower support are respectively provided with limiting bosses, and the limiting bosses cooperate with the bottom frame of the circuit breaker to limit the amplitude of the swing of the contact. The bridge type contact comprises 8. An electrical connection device as claimed in claim 2, characterised in that a support frame, which is a "port” shaped structure, and is provided with an upper mounting port at the upper end and a lower mounting port at the lower end. ​ The upper soft connecting conductor, the upper spring sheet and the upper pressing rod are arranged in the upper mounting port, the hard contacts at the two ends of the upper soft connecting conductor are supported by the front and rear supporting edges in the upper mounting port, the two ends of the upper pressing rod are arranged in the upper mounting port, the upper pressing rod is pressed to the middle part of the upper spring sheet, and the front and rear ends of the upper spring sheet are elastically pressed to the front and rear hard contacts respectively; A plurality of upper heat dissipation grooves are arranged on the upper soft connecting conductor, the upper heat dissipation grooves extend from the front end hard contact to the rear end hard contact of the upper soft connecting conductor, and each upper heat dissipation groove divides the front end of the upper soft connecting conductor into a plurality of upper contact head units; The lower soft connecting conductor, the lower spring sheet and the lower pressing rod are arranged in the lower mounting port, the hard contacts at the two ends of the lower soft connecting conductor are supported by the front and rear supporting edges in the lower mounting port, the two ends of the lower pressing rod are arranged in the lower mounting port, the lower pressing rod is pressed to the middle part of the lower spring sheet, and the front and rear ends of the lower spring sheet are elastically pressed to the front and rear hard contacts respectively; A plurality of lower heat dissipation grooves are arranged on the lower soft connecting conductor, the lower heat dissipation grooves extend from the front end hard contact to the rear end hard contact of the lower soft connecting conductor, and each lower heat dissipation groove divides the front end of the lower soft connecting conductor into a plurality of lower contact head units; The upper soft connecting conductor is provided with an upper positioning structure in the upper mounting port, and the upper positioning structure limits the front and rear movement of the upper soft connecting conductor in the upper mounting port; The lower soft connecting conductor is provided with a lower positioning structure in the lower mounting port, and the lower positioning structure limits the front and rear movement of the lower soft connecting conductor in the lower mounting port; The front end two hard contacts form a cutter body socket, and the front end two hard contacts are provided with hook grooves; The rear end two hard contacts form a busbar socket; The upper support and the lower support are respectively arranged on the front end two hard contacts, and the ear plates of the upper support and the lower support abut each other to control the opening distance of the cutter body socket.

9. The electric connection device according to claim 8, wherein The upper positioning structure comprises a plurality of upper positioning strips, each upper positioning strip is arranged on the front and rear supporting edges in the upper mounting port, and the upper positioning strips on the front and rear supporting edges correspond to each other in front and rear directions; a plurality of upper positioning holes, each upper positioning hole is arranged in the upper heat dissipation groove, the distribution of each upper positioning hole corresponds to each upper positioning strip, and each upper positioning strip passes through each upper positioning hole; The lower positioning structure comprises a plurality of lower positioning strips, each lower positioning strip is arranged on the front and rear supporting edges in the lower mounting port, and the lower positioning strips on the front and rear supporting edges correspond to each other in front and rear directions; a plurality of lower positioning holes, each lower positioning hole is arranged in the lower heat dissipation groove, the distribution of each lower positioning hole corresponds to each lower positioning strip, and each lower positioning strip passes through each lower positioning hole.

10. The electric connection device according to claim 2, wherein The bridge type contact comprises a support frame, the support frame is in a "port" structure, the upper end of the support frame forms an upper mounting port, and the lower end of the support frame forms a lower mounting port; an upper contact sheet group and a lower contact sheet group, which are arranged in the upper mounting port and the lower mounting port respectively, the front end of the upper contact sheet group and the lower contact sheet group forms a cutter body socket, and the rear end forms a busbar socket; The front end of the upper contact sheet group and the lower contact sheet group is provided with a hook groove. The upper support is respectively screwed with the upper contact pieces in the upper contact piece group at both ends; The lower support is respectively screwed with the lower contact pieces in the lower contact piece group at both ends.

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