Splicing type modularized traction motor connector

Abstract

The invention relates to the technical field of traction motor connectors, and provides a splicable modular traction motor connector which comprises a plug assembly and a socket assembly which are of a splicable structure, the plug assembly and the socket assembly achieve fixed arrangement of a plurality of plug units or socket units through rib plates respectively, damaged plug units or damaged jack units can be replaced and maintained conveniently, and the plug assembly and the socket assembly are convenient to assemble and disassemble. The cost is reduced; the internal space of the plug unit and the socket unit is greatly reduced compared with that of an integral connector, the risk that condensation is formed in the connector in a high-temperature and humid environment is reduced, meanwhile, due to the fact that the internal space is reduced, heat generated by a large-current terminal can rapidly make contact with an external metal shell through a medium, the heat dissipation performance of the connector is improved, and the service life of the connector is prolonged. The safety of the product is improved; besides, the plug assembly and the socket assembly are fixedly installed through the wire fixing assembly, and the wire is fixed at the same time, so that swinging force caused by vibration of the wire during operation of a locomotive is reduced, and the situation that the connection stability of the connector is affected due to stress failure of the connector is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of traction motor connectors, and in particular to a splicable modular traction motor connector. Background Art

[0002] Rail transit cable connectors are primarily used between various transmission devices (such as various digital switches, signal transmission between vehicles, and internal connections of optoelectronic transmission equipment). They can also be used between communication devices for data transmission (including audio, video, and electronic communications). Cables are connected via connector plugs and sockets.

[0003] The existing technology is a series of vehicle traction high-current motor connector products, which are responsible for the transmission of high current to power the traction motor system. The products have 3-core and 4-core power structures, and the plug structure has straight or curved wire outlet forms. The head seat bolts are locked to achieve direct plug-in docking, realizing high current transmission of the traction system.

[0004] However, in existing technical products, the interior of the product is an integral cavity. If the seal fails somewhere, all internal phases will be affected, and it is also difficult to identify the problem point. Even if the problem is found, all of them can only be replaced. At the same time, the current carrying capacity is relatively small, the internal space is large, the risk of condensation is high, and the heat dissipation is slow, which can easily lead to safety hazards. Summary of the Invention

[0005] The purpose of the present invention is to provide a splicable modular traction motor connector to solve the problems of existing connectors that require complete replacement after seal failure, which increases costs, and the large internal space that is prone to condensation.

[0006] In a first aspect, the present invention provides a modular traction motor connector that can be spliced, comprising: A socket assembly, the socket assembly comprising a plurality of independently arranged socket units, the plurality of socket units being fixedly connected by a first rib, each of the socket units having a socket space therein; A plug assembly comprising a plurality of independently arranged plug units, the plurality of socket units being fixedly connected by a second rib, each of the plug units defining a plug space; the plug units being matingly connected to the socket units; and the total volume of the plug space and the socket space satisfying the following requirement: V < (n × ρwater × Vwater) / ρwater vapor (at the extreme temperature), where n represents the total number of subspaces within the plug space and the socket space. A wire fixing assembly is used to be installed under the vehicle body. The socket assembly and the plug assembly are respectively connected to the wire fixing assembly through connectors, and are used to fix the wires connecting the plug assembly and the socket assembly.

[0007] Optionally, the wire fixing assembly includes a first fixing frame and a second fixing frame, the socket assembly is fixedly connected to the first fixing frame via a first connecting member, and the plug assembly is fixedly connected to the second fixing frame via a second connecting member.

[0008] Optionally, the socket assembly is a linear structure, and the plug assembly is a curved structure; the first fixing bracket is installed under the vehicle body, the upper end of the second fixing bracket is fixedly connected to the first fixing bracket, the lower end of the second fixing bracket is suspended below the socket assembly, and the plug assembly is fixedly connected to the second fixing bracket via a second connecting member.

[0009] Optionally, the first fixing frame is a plate structure with a downward protrusion in the middle, the second fixing frame is a frame-type plate structure, the upper end of the second fixing frame is fixedly connected to the concave position of the first fixing frame, and the lower end of the second fixing frame is provided with a wire pressing plate for fixing the wire.

[0010] Optionally, the socket assembly and the plug assembly are both linear structures; the first fixing frame and the second fixing frame are both installed under the vehicle body, the socket assembly is fixedly connected to the first fixing frame via a first connecting member, and the plug assembly is fixedly connected to the second fixing frame via a second connecting member.

[0011] Optionally, the first fixing frame and the second fixing frame are both plate structures with a downwardly protruding middle portion, and the first fixing frame and the second fixing frame are spaced apart in the horizontal direction; The first fixing frame and the second fixing frame are provided with wire pressing plates.

[0012] Optionally, the plug unit includes a plug shell, in which a pin and a wire pressing terminal are provided, the pin is arranged in a horizontal direction, the wire pressing terminal is arranged in a vertical direction, one end of the pin is fixedly connected to one end of the wire pressing terminal, and the other end of the pin is used to dock with the socket unit; the pin and the wire pressing terminal and the plug insulator structure inside the plug shell form the plug space.

[0013] Optionally, a plug insulator is provided on the inner wall of the plug housing, a claw fixing ring is circumferentially provided on the pin, claws are circumferentially provided on the inner side of the plug insulator, and several claws are clamped in the claw fixing ring to cooperate, thereby realizing axial limitation of the pin.

[0014] Optionally, the socket unit includes a socket shell, in which a slot terminal is provided, and the slot terminal and a socket insulator inside the socket shell form the socket space; the pin is inserted into the corresponding slot terminal and fixed by a connector.

[0015] Optionally, the slot terminal divides the socket space into two sub-spaces, and the pin and the wire pressing terminal divide the plug space into two sub-spaces, so that the number of the sub-spaces is four after mating.

[0016] Optionally, a first fixing hole is provided on the first rib plate, and a second fixing hole corresponding to the first fixing hole is provided on the second rib plate. The connecting member is a bolt, and the first fixing hole and the second fixing hole at the corresponding position are locked by the bolt.

[0017] Optionally, the total volume V of the plug space and the socket space needs to meet the following requirements: a minimum electrical clearance of 18 mm and a minimum creepage distance of 37.5 mm; wherein the minimum electrical clearance is the shortest distance between the crimping terminal and the plug shell along the surface of the plug insulator, and the minimum creepage distance is the shortest distance between the slot terminal and the socket shell along the surface of the socket insulator.

[0018] The present invention has at least the following technical effects: The present invention provides a splicable modular traction motor connector, which includes a plug assembly and a socket assembly, both of which are splicable structures. Each of them uses a rib plate to achieve a fixed arrangement of multiple plug units or socket units, and each cavity is relatively independent, which is convenient for replacing and repairing damaged plugs or socket units, thereby reducing costs; the internal space of the plug unit and the socket unit is greatly reduced compared to the integral connector, reducing the risk of condensation forming inside the connector in a highly warm and humid environment. At the same time, due to the reduction in internal space, the heat generated by the high-current terminal can quickly contact the external metal shell through the medium, which is beneficial to improving the heat dissipation performance of the connector and improving the safety of the product; in addition, the fixed installation of the plug assembly and the socket assembly is achieved through the wire fixing assembly, and the wire is fixed at the same time, thereby reducing the swing force caused by the vibration of the wire when the locomotive is running, and avoiding the failure of the joint due to stress and affecting the connection stability of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the overall installation structure of a splicable modular traction motor connector (curved type) provided in an embodiment of the present invention; Figure 2 for Figure 1 Exploded view of; Figure 3 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the socket unit and the plug unit; Figure 4 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the middle plug unit; Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the structure of the middle pin's claw fixing ring and the clamping body; Figure 6 A schematic diagram of the overall installation structure of another connectable modular traction motor connector (straight type) provided in an embodiment of the present invention; Figure 7 The embodiment of the present invention provides Figure 6 a top view of the middle socket unit; Figure 8 The embodiment of the present invention provides Figure 6 Schematic diagram of the internal structure of the middle socket unit; Figure 9 The embodiment of the present invention provides Figure 6 A top view of the middle plug unit; Figure 10 The embodiment of the present invention provides Figure 6 Schematic diagram of the internal structure of the middle plug unit; Figure 11 The embodiment of the present invention provides Figure 1 Schematic diagram of the marking of the minimum electrical clearance within the plug unit; Figure 12 The embodiment of the present invention provides Figure 1 Schematic diagram of the minimum creepage distance within the socket unit.

[0021] Icons: 100 - socket assembly; 110 - socket unit; 110a - first metal shielding connector; 111 - socket space; 111a - first socket subspace; 111b - second socket subspace; 112 - socket housing; 113 - slot terminal; 114 - first butt-end sealing ring; 115 - first retaining spring; 116 - socket insulator; 117 - first tail sealing ring; 118 - first mounting positioning plate; 119 - first pipe joint; 120 - first rib plate; 130 - first mounting hole; 140 - first positioning pin; 150 - first fixing hole; 200 - plug assembly; 210 - plug unit; 210a - second metal shielding connector; 211 - plug space; 211a - first plug subspace; 211b - second plug subspace; 212 - plug housing; 213 - pin; 213a - claw fixing ring; 214 - crimping terminal; 215 - conductive connector; 216 - plug insulator; 216a - claw; 217 - second tail sealing ring; 218 - second pipe joint; 219 - second retaining spring; 220 - second rib plate; 221 - second butt-end sealing ring; 222 - second mounting positioning plate; 230 - second mounting hole; 240 - second positioning pin; 250 - second fixing hole; 300-wire fixing assembly; 310-first fixing frame; 320-second fixing frame; 321-transverse rib plate; 400-wire pressing plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless specifically defined as such, will not be interpreted in an idealized or overly formal sense.

[0024] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a," "an," "said," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0025] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0026] Combine Figures 1 to 10As shown, an embodiment of the present invention provides a splicable modular traction motor connector, including: a socket assembly 100, a plug assembly 200 and a wire fixing assembly 300. The plug assembly 200 and the socket assembly 100 are both installed on the wire fixing assembly 300 and cooperate with each other to achieve electrical connection of different electrical equipment (for example, traction motors). The wire fixing assembly 300 not only provides an installation and fixing carrier for the plug assembly 200 and the socket assembly 100 and the vehicle body (for example, a train car), but also can fix the wires of the socket assembly 100 and the plug assembly 200 to prevent the wires from loosening or even falling off during vibration, thereby affecting the connection stability.

[0027] Specifically, the socket assembly 100 includes a plurality of independently arranged socket units 110 ( Figure 1 In the figure, there are three socket units 110), and the multiple socket units 110 are fixedly connected as a whole by the first rib 120 and fixed by the first mounting positioning plates 118 on both sides. Each socket unit 110 can be replaced independently and positioned and fixed through the positioning mounting holes on the first rib 120. When maintenance or replacement is required, it can be pulled out. Each socket unit 110 is provided with a socket space 111. The socket space 111 can be understood as the space inside the shell of the socket unit 110. A first metal shielding connector 110a is provided at the end of the socket unit 110, which is used to insert the wire inside and has a shielding effect on the outside to prevent interference with the wire from the external environment.

[0028] The plug assembly 200 includes a plurality of independently arranged plug units 210 ( Figure 1 In the figure, there are three plug units 210), and the multiple socket units 110 are fixedly connected by the second rib 220 to form an integral structure and fixed by the second mounting positioning plates 222 on both sides. Each plug unit 210 can be replaced independently and positioned and fixed through the positioning mounting holes on the second rib 220. When it needs to be repaired or replaced, it can be pulled out. Each plug unit 210 is provided with a plug space 211. The plug space 211 can be understood as the space inside the shell of the plug unit 210. Each plug unit 210 and the socket unit 110 are connected to the corresponding electrical terminals. The plug unit 210 and the socket unit 110 are matched and docked one by one, thereby realizing the electrical connection between the socket assembly 100 and the plug assembly 200, and then realizing the electrical connection between different locomotives. A second metal shielding connector 210a is provided at the end of the plug unit 210, which is used to insert the wire inside and has a shielding effect on the outside to prevent interference with the wire from the external environment.

[0029] In order to reduce the risk of condensation forming inside the connector in a highly warm and humid environment, the total volume space of the plug space 211 and the socket space 111 needs to satisfy the following requirement: V < (n×ρwater×Vwater) / ρwater vapor (at extreme temperature), where n represents the total number of subspaces within the plug space 211 and the socket space 111 (n also refers to the number of condensation drops). The number of subspaces n refers to the total number of independent spaces inside the shells of the plug assembly 200 and the socket assembly 100 after they are mated. Each independent space is prone to condensation, but the greater the number of independent spaces, the less likely condensation is to occur. The specific value of n is determined according to the internal structure of the plug unit 210 and the socket unit 110.

[0030] It's important to note that when water vapor reaches saturation in the air, it condenses into droplets, known as condensation, on relatively cool objects. Condensation can lead to adverse effects such as reduced insulation strength, mold growth, and metal corrosion. Theoretically, when the connector is mated, moist air from outside enters, and when the ambient temperature drops, condensation forms on the inner wall of the connector housing. The boundary volume within the connector where condensation forms is calculated and verified to ensure that the resulting condensation does not harm the connector's normal operation. While condensation is unavoidable in extreme environments, as long as condensation cannot enter the electrical contacts, the connector will function properly (as per standard GB4208-2008, Protection Grades of Enclosures).

[0031] Specific design specifications within the connector: the diameter of condensation cannot exceed 4 mm (if it exceeds this number, it will fall off due to its own gravity). The connector housing is composed of the plug insulator 216, the socket insulator 116, and their internal structure, forming a total of four large spaces (equivalent to four subspaces. The distribution of the subspaces is detailed in the specific structure of the plug unit 210 and the socket unit 110). Assuming that under extreme conditions, all water vapor in the connector forms a drop of condensation in each subspace, the boundary condition for the connector to be unaffected by condensation is that the total water vapor content in the internal space is insufficient to form four drops of condensation with a diameter of 4 mm.

[0032] For example, in the formula for calculating the maximum value of the total volume of the plug space 211 and the socket space 111, ρwater represents the density of water (1.0×10³ kg / m³), ρwatervapor represents the density of water vapor at the extreme temperature, Vwater represents the volume of a drop of condensation, and V=πR 3 In this embodiment, the maximum condensation radius R is 2 mm (i.e., the diameter of the condensation is 4 mm), and ρ water is 1.0×10³ kg / m³, which is equivalent to 0.001 g / mm 3 , at the air limit temperature (60℃), ρ water vapor is 129.9g / m 3 , n is 4.

[0033] First calculate the total mass of 4 drops of condensation: Mwater = рwater × Vwater = 4 × 0.001 × π × 23 = 0.1g; Connector internal design boundary volume: Vmax = Mwater / ρwater vapor = 0.1 / 129.9 = 770000mm 3 ; That is, the internal volume of the connector before rectification is 785172mm 3 (Calculated from the 3D model of the product) More than 770,000 mm 3 , condensation will form, and the volume after rectification is 126012 mm 3 (calculated through the three-dimensional model of the product) is much smaller than the above value. Therefore, compared with the prior art, condensation will not form inside the connector after rectification in the embodiment of the present invention, and the connection reliability is high. Furthermore, the wire fixing assembly 300 is generally installed under the vehicle body through a connector, and the socket assembly 100 and the plug assembly 200 are respectively connected to the wire fixing assembly through the connector. The wire fixing assembly is used to fix the wires connecting the plug assembly 200 and the socket assembly 100. The wire fixing assembly 300 can be provided with structures such as buckles, card plates, positioning holes, or positioning grooves for fixing the wires.

[0034] The embodiment of the present invention provides a splicable modular motor connector, which includes a plug assembly and a socket assembly, both of which are splicable structures. Each of them uses a rib plate to achieve a fixed arrangement of multiple plug units or socket units, and each cavity is relatively independent, which is convenient for replacing and repairing damaged plugs or socket units, thereby reducing costs; the internal space of the plug unit and the socket unit is greatly reduced compared to the integral connector, reducing the risk of condensation forming inside the connector in a highly warm and humid environment. At the same time, due to the reduction in internal space, the heat generated by the high-current terminal can quickly contact the external metal shell through the medium, which is beneficial to improving the heat dissipation performance of the connector and improving the safety of the product; in addition, the fixed installation of the plug assembly and the socket assembly is achieved through the wire fixing assembly, and the wire is fixed at the same time, thereby reducing the swing force caused by the vibration of the wire when the locomotive is running, and avoiding failure of the joint due to stress and affecting the connection stability of the connector.

[0035] Example 1 Continue reading Figures 1 to 4 The socket assembly 100 is a linear structure, and the plug assembly 200 is a curved structure. It is mainly suitable for use between two adjacent carriages. Since the carriages move relative to each other, wires need to be pre-stored between the plugs. The pre-stored wires between the curved plugs are long and are not limited by the short distance between carriages.

[0036] Specifically, the wire fixing assembly 300 includes a first fixing bracket 310 and a second fixing bracket 320. The first fixing bracket 310 is fixedly mounted below the vehicle body. The socket assembly 100 is fixedly connected to the first fixing bracket 310 via a first connector. The first connector is specifically aligned with a positioning hole in the first fixing bracket 310 via a first mounting hole 130 on the socket assembly 100. Optionally, the first fixing bracket 310 is provided with a wire clamp or wire retainer for securing the wires. The wire clamp or wire retainer is mounted below the first fixing bracket 310 via a connector to secure the wires connected to the socket assembly 100, thereby preventing the wires from loosening or falling off due to vibration.

[0037] Furthermore, the upper end of the second fixing frame 320 is fixedly connected to the first fixing frame 310 (for example, welded or bolted), and the lower end of the second fixing frame 320 is suspended below the socket assembly 100. The two form a structure similar to a "T" shape, thereby matching the structure of the linear socket assembly 100 and the curved plug assembly 200, so that the plug assembly 200 is fixedly connected to the second fixing frame 320 through the second connecting member. The second connecting member is specifically connected to the positioning hole on the second fixing frame 320 through the second mounting hole 230 on the plug assembly 200.

[0038] Optionally, the first mounting bracket 310 is a plate structure with a downwardly protruding center. Specifically, the center portion of the first mounting bracket 310 is bent downward, with both sides aligned horizontally to facilitate secure connection to the underside of the locomotive. This downwardly protruding portion creates a clearance area, which serves as the mounting and connection area for the socket assembly 100 and the second mounting bracket 320. This prevents interference between the socket assembly 100 and the second mounting bracket 320 on the underside of the locomotive during installation.

[0039] Furthermore, the second fixing frame 320 is a frame-type plate structure. The upper end of the second fixing frame 320 can be inserted into the yield area of the first fixing frame 310. In this way, it is fixedly connected to the recessed position of the first fixing frame 310 via the connecting member, thereby improving the stability of the second fixing frame 320. The lower portion of the second fixing frame 320 is provided with two transverse ribs 321 for fixing the wire pressing plate 400 and the plug assembly 200. The upper transverse rib 321 is used to fix the plug assembly 200, and the lower transverse rib 321 is used to fix the wire pressing plate 400. Therefore, the plug assembly 200 and the wire pressing plate 400 are respectively fixed to the second fixing frame 320 via the connecting member.

[0040] Optionally, the wire pressing plate 400 is a U-shaped structure, which includes straight segments on both sides and a connecting segment in the middle. The straight segments on both sides are fixed to the transverse ribs 321 on the second fixing frame 320 through connecting parts. A plurality of semicircular grooves for fixing the wires are arranged at intervals on the straight segment in the middle. The position of the semicircular grooves is exactly below the wire pressing terminal 214 of the corresponding plug unit 210, and the wires of different plug units 210 are fixed respectively.

[0041] In some embodiments, continue to refer to Figure 3 and Figure 4 Taking the curved plug assembly 200 as an example, the corresponding plug units 210 are all curved.

[0042] Specifically, the plug unit 210 includes a plug housing 212. The entire plug housing 212 is an inverted "L" shape. A pin 213 and a wire pressing terminal 214 are provided in the plug housing 212. The pin 213 is arranged along the horizontal direction indicated in the figure, and the wire pressing terminal 214 is arranged along the vertical direction indicated in the figure, that is, the axial direction of the pin 213 and the axial direction of the wire pressing terminal 214 are perpendicular to each other, thereby adapting to the internal structure of the plug housing 212.

[0043] Furthermore, one end of the pin 213 is fixedly connected to one end of the wire crimping terminal 214 through a conductive connector 215 (for example, a screw), and the other end of the pin 213 is used to dock with the socket unit 110; the pin 213 and the wire crimping terminal 214 are constructed with the plug insulator 216 on the inner side of the plug housing 212 to form a plug space 211.

[0044] Alternatively, as Figures 3 to 5 As shown, the pin 213 is provided with a claw fixing ring 213a along the circumferential direction, and the inner side of the plug insulator 216 is provided with a claw 216a along the circumferential direction. The claw 216a is clamped in the claw fixing ring 213a to cooperate to achieve axial positioning, thereby realizing the rotatable cooperation between the pin 213 and the plug housing 212. In this way, the pin 213 and the wire pressing terminal 214 are actually in a state of active electrical connection. In this way, even if the pin 213 rotates after being matched with the socket, it will not cause the wire to break or fall off, thereby further improving the stability of the connector.

[0045] Optionally, the socket unit 110 includes a socket housing 112 , in which a socket terminal 113 is provided. The socket terminal 113 and a socket insulator 116 on the inner side of the socket housing 112 form a socket space 111 ; the pin 213 is inserted into the corresponding socket terminal 113 and fixed by a connector.

[0046] Optionally, the slot terminal 113 divides the socket space 111 into two sub-spaces (a first socket sub-space 111a and a second socket sub-space 111b), and the pin 213 and the wire pressing terminal 214 divide the plug space 211 into two sub-spaces (a first plug sub-space 211a and a second plug sub-space 211b, but excluding the area that cooperates with the slot terminal 113), so that the total number of sub-spaces after cooperation is four, that is, a maximum of four drops of condensation are allowed to form in the four sub-spaces, which corresponds to the value of n in the formula for calculating the maximum volume V described above.

[0047] In some embodiments, the total volume V of the internal spaces of the plug space 211 and the socket space 111 is not necessarily smaller, but rather needs to meet the following conditions: a minimum electrical clearance of 18 mm and a minimum creepage distance of 37.5 mm. The minimum electrical clearance is the shortest distance along the surface of the plug insulator 216 between the wire crimping terminal 214 and the plug housing 212. This is because, under certain operating conditions, when conductive contaminants are present on the surface of the insulating material, to prevent leakage breakdown between the wire crimping terminal 214 and the plug housing 212, the plug structure must be designed to meet this minimum distance along the insulating surface. The minimum creepage distance is the shortest distance along the surface of the socket insulator 116 between the socket terminal 113 and the socket housing 112. This is because, under certain operating conditions, when conductive contaminants are present on the surface of the insulating material, to prevent leakage breakdown between the socket terminal 113 and the socket housing 112, this minimum distance is required. This distance parameter can ensure that the product meets the customer's specified voltage rating.

[0048] Specifically, according to the requirements of GB / T 21413.1-2008, the steps for determining the minimum electrical clearance are as follows: the rated voltage Ui is 3000V, and the rated impulse voltage Ump is 15kV according to the national standard according to level OV3; according to the pollution level PD3, the minimum electrical clearance is 18mm, such as Figure 11 The minimum electrical clearance L1 of the actually measured three-dimensional model of the vehicle head of the connector provided by the embodiment of the present invention is 24.52+4.1=28.62mm>18mm, which meets the requirement.

[0049] The socket insulator 116 material used in this product is PC, with a relative tracking index of 600. According to the provisions of GB / T21413.1-2008, the material group is Ⅰ, the rated insulation voltage is 3000VAC, and the socket pollution level is PD3. The required minimum creepage distance is 3×12.5=37.5mm. Figure 12 The measured minimum creepage distance L2 of the contact body of the three-dimensional model of the embodiment of the present invention is 35.7+0.79+1.7=38.19 mm, which is greater than the required value of 37.5 mm, that is, it meets the requirement.

[0050] Example 2 like Figures 6 to 10 As shown, the socket assembly 100 and the plug assembly 200 are both linear structures. The plug and socket of the linear structure are more convenient to connect and are suitable for connector installation in a limited space under the locomotive.

[0051] Specifically, the wire fixing assembly 300 includes a first fixing bracket 310 and a second fixing bracket 320. Both fixing brackets 310 and 320 are mounted below the vehicle body. Since both the socket assembly 100 and the plug assembly 200 are linear, the structures of the first fixing bracket 310 and the second fixing bracket 320 are essentially identical and spaced apart below the vehicle body. The socket assembly 100 is fixedly connected to the first fixing bracket 310 via a first connector, and the plug assembly 200 is fixedly connected to the second fixing bracket 320 via a second connector.

[0052] Optionally, the first fixing frame 310 and the second fixing frame 320 are both plate structures with a downward protrusion in the middle, and the first fixing frame 310 and the second fixing frame 320 are spaced apart in the horizontal direction to facilitate the matching installation of the socket assembly 100 and the plug assembly 200.

[0053] Optionally, a wire pressing plate is provided on the first fixing frame 310 and the second fixing frame 320. The wire pressing plate is provided with a through hole for the wire to pass through, thereby achieving position limiting and fixing of the wire and preventing loose connection caused by vibration.

[0054] The following describes the assembly structure of the linear socket assembly 100 and the plug assembly 200. Figures 7 to 10 For the linear socket assembly 100, a first mating end seal 114 is placed inside the socket housing 112, and the socket insulator 116 is clamped inside the socket housing 112 by a first retaining spring 115; the socket terminal 113 is fixed inside the socket insulator 116 by a claw. After the socket housing 112 is assembled, the sockets are first positioned by a first positioning pin 140, and then fixed together by screws through a first rib 120. Before fixing, a first tail seal 117 is placed in the positioning hole of the first rib 120. The end of the socket unit 110 away from the plug unit 210 is a first pipe joint 119 (equivalent to Figure 2 The first metal shielding connector 110a is used to connect the wires and provide a certain shielding effect for the wires.

[0055] Similarly, for the linear plug assembly 200, a second mating end sealing ring 221 is placed in the plug housing 212, and the plug insulator 216 is clamped in the plug housing 212 by a second retaining spring 219; the pin 213 is fixed in the plug insulator 216 by a claw. After the plug housing 212 is assembled, they are first positioned by the second positioning pin 240, and then fixed together by screws through the second rib 220. Before fixing, a second tail sealing ring 217 is placed in the positioning hole of the second rib 220. The end of the plug unit 210 away from the socket unit 110 is a second pipe joint 218 (equivalent to Figure 2 The second metal shielding connector 210a is used to connect the wires and provide a certain shielding effect for the wires.

[0056] Optionally, continuing with the example that the socket assembly 100 and the plug assembly 200 are both linear, a first fixing hole 150 is provided on the first rib 120, and a second fixing hole 250 is provided on the second rib 220. The second fixing holes 250 correspond one-to-one to the first fixing holes 150. The first fixing holes 150 and the second fixing holes 250 at the corresponding positions are locked by bolts, thereby realizing the coordinated installation of the socket assembly 100 and the plug assembly 200, which is convenient for subsequent disassembly and maintenance.

[0057] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in the present invention may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in the present invention may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in the present invention may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0058] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0060] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. It should be understood that although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they may be performed in other orders. Moreover, at least some of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but may be performed at different times, and their execution order is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular traction motor connector that can be spliced, characterized in that: include: A socket assembly, the socket assembly comprising a plurality of independently arranged socket units, the plurality of socket units being fixedly connected by a first rib, each of the socket units having a socket space therein; A plug assembly comprising a plurality of independently arranged plug units, the plurality of socket units being fixedly connected by a second rib, each of the plug units defining a plug space; the plug units being matingly connected to the socket units; and the total volume of the plug space and the socket space satisfying the following requirement: V < (n × ρwater × Vwater) / ρwater vapor (at the extreme temperature), where n represents the total number of subspaces within the plug space and the socket space. A wire fixing assembly is used to be installed under the vehicle body. The socket assembly and the plug assembly are respectively connected to the wire fixing assembly through connectors, and are used to fix the wires connecting the plug assembly and the socket assembly.

2. The connectable modular traction motor connector according to claim 1, characterized in that: The wire fixing assembly includes a first fixing frame and a second fixing frame. The socket assembly is fixedly connected to the first fixing frame via a first connecting member, and the plug assembly is fixedly connected to the second fixing frame via a second connecting member.

3. The connectable modular traction motor connector according to claim 2, characterized in that: The socket assembly is a straight structure, and the plug assembly is a curved structure; The first fixing bracket is installed below the vehicle body, the upper end of the second fixing bracket is fixedly connected to the first fixing bracket, the lower end of the second fixing bracket is suspended below the socket assembly, and the plug assembly is fixedly connected to the second fixing bracket via a second connecting member.

4. The connectable modular traction motor connector according to claim 3, characterized in that: The first fixing frame is a plate structure with a downward protrusion in the middle, and the second fixing frame is a frame plate structure. The upper end of the second fixing frame is fixedly connected to the concave position of the first fixing frame, and the lower end of the second fixing frame is provided with a wire pressing plate for fixing the wire.

5. The connectable modular traction motor connector according to claim 2, characterized in that: The socket assembly and the plug assembly are both linear structures; The first fixing frame and the second fixing frame are both installed below the vehicle body. The socket assembly is fixedly connected to the first fixing frame via a first connecting member, and the plug assembly is fixedly connected to the second fixing frame via a second connecting member.

6. The connectable modular traction motor connector according to claim 5, characterized in that: The first fixing frame and the second fixing frame are both plate structures with a downward protrusion in the middle, and the first fixing frame and the second fixing frame are spaced apart in the horizontal direction; The first fixing frame and the second fixing frame are provided with wire pressing plates.

7. The connectable modular traction motor connector according to any one of claims 1 to 6, characterized in that: The plug unit comprises a plug housing, wherein a pin and a wire pressing terminal are arranged in the plug housing, wherein the pin is arranged in a horizontal direction and the wire pressing terminal is arranged in a vertical direction; One end of the pin is fixedly connected to one end of the wire pressing terminal, and the other end of the pin is used to connect with the socket unit; the pin and the wire pressing terminal and the plug insulator structure inside the plug housing form the plug space.

8. The connectable modular traction motor connector according to claim 7, characterized in that: The pin is provided with a claw fixing ring along the circumferential direction, and the inner side of the plug insulator is provided with claws along the circumferential direction. Several claws are clamped in the claw fixing ring and matched to realize the axis limitation of the pin.

9. The connectable modular traction motor connector according to claim 7, characterized in that: The socket unit includes a socket housing, wherein a slot terminal is provided in the socket housing, and the slot terminal and the socket insulator inside the socket housing form the socket space; the pin is inserted into the corresponding slot terminal and fixed by a connector; The slot terminal divides the socket space into two sub-spaces, and the pin and the wire pressing terminal divide the plug space into two sub-spaces, so that the total number of the sub-spaces after mating is four.

10. The connectable modular traction motor connector according to claim 9, characterized in that: The total volume V of the plug space and the socket space needs to meet the following requirements: a minimum electrical clearance of 18 mm and a minimum creepage distance of 37.5 mm; wherein the minimum electrical clearance is the shortest distance between the crimping terminal and the plug housing along the surface of the plug insulator, and the minimum creepage distance is the shortest distance between the slot terminal and the socket housing along the surface of the socket insulator.

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