Line electrical fault simulation device

Abstract

This invention provides a circuit electrical fault simulation device, belonging to the field of automotive testing technology. It solves the problem of the lack of existing circuit loose connection simulation devices for vehicle testing. This circuit electrical fault simulation device includes a housing, a fixed contact and a moving contact disposed within the housing, with the moving contact overlapping the fixed contact. The housing also includes a driving component for driving the moving contact to change the overlap area between the moving and fixed contacts. It can be used to simulate different degrees of circuit loose connections, facilitating vehicle testing and contributing to the formation of unified testing standards.

Description

Technical Field

[0001] This invention belongs to the field of automotive testing technology and relates to a circuit electrical fault simulation device. Background Technology

[0002] With the development of technology, new energy vehicles have entered thousands of households, and the testing and technological upgrading of new energy vehicles are also a guarantee for the safe use of vehicles.

[0003] Given the unique structure and complex circuitry of electric vehicles, a safe and rational plan for the entire high-voltage system is essential. The foundation for technological improvement and refinement generally relies on continuous simulation testing. By examining the vehicle's safety performance under various fault conditions, further optimization designs can be proposed. Circuit fault detection is a particularly critical aspect. For example, detecting the impact of loose connections on vehicle performance is crucial. Currently, there is no specific device for simulating loose connections in vehicle circuits, which not only increases the technical difficulty of the testing process but also hinders the development of unified testing standards. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a line electrical fault simulation device that can simulate different degrees of line disconnection.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An electrical fault simulation device for a circuit includes a housing, a fixed contact and a moving contact disposed within the housing, wherein the moving contact overlaps with the fixed contact, and the housing is further provided with a driving component for driving the moving contact to change the overlap area between the moving contact and the fixed contact.

[0007] Under the action of the driving component, the moving contact can move linearly or swing.

[0008] In the aforementioned electrical fault simulation device, the moving / fixed contact has an overlapping groove extending in a straight line, and the fixed / moving contact has an overlapping protrusion that slides with the overlapping groove. The driving assembly drives the moving contact to move along the length of the overlapping groove. The cross-section of the overlapping protrusion has the same shape as the cross-section of the overlapping groove, and the two are in surface contact.

[0009] In the above-mentioned electrical fault simulation device, the moving contact / fixed contact is provided with a beveled surface, the lap groove is provided on the beveled surface, and the distance from the bottom of the lap groove to the beveled surface gradually decreases to zero from one end of the lap groove to the other end.

[0010] Because the depth of the lap groove gradually changes, when the moving contact moves, the contact area between the lap protrusion and the lap groove changes linearly, improving the accuracy of simulating circuit malfunctions.

[0011] In the above-mentioned electrical fault simulation device, the lap groove is a V-shaped groove, and the intersection line formed by the intersection of the two inner sides of the V-shaped groove extends along the movement direction of the moving contact. The distance from the intersection line to the oblique surface gradually decreases to zero from one end of the lap groove to the other end. The lap protrusion is a V-shaped protrusion, and the two outer sides of the V-shaped protrusion slide in contact with the two inner sides of the V-shaped groove, respectively.

[0012] In the above-mentioned electrical fault simulation device, the end of the lap groove with the deeper depth has a first end face, and the lap protrusion has a second end face corresponding to the first end face. When the first end face and the second end face are in contact, the contact area between the moving contact and the fixed contact reaches the maximum.

[0013] In the above-mentioned electrical fault simulation device, the housing is provided with two first mounting seats and a slide. The fixed contact is cylindrical and is located on one of the first mounting seats. The moving contact is cylindrical and is located on the other first mounting seat. The fixed contact and the moving contact are parallel. The overlapping groove extends along the axial direction of the fixed contact. The other first mounting seat is located on the slide. The driving assembly drives the slide to move along the axial direction of the moving contact.

[0014] Both the fixed contact and the moving contact have a metal core extending from the fixed end of the first mounting base. The metal core is connected to the conductor, and an external spline is provided on the metal core of the extended part. During assembly, the moving contact and the fixed contact are inserted into the corresponding internal spline slots.

[0015] The spline structure greatly increases the contact area between the moving contact and the first mounting base, while also enabling circumferential positioning and ensuring the structural strength of the installation.

[0016] In the above-mentioned electrical fault simulation device, the drive assembly includes a lead screw disposed in the housing and a motor for driving the lead screw to rotate. The lead screw passes through the slide and is threadedly connected to the slide. The lead screw is parallel to the moving contact.

[0017] When the motor is working, it drives the lead screw to rotate, which in turn drives the slide to move, causing the contact area between the moving contact and the fixed contact to change. This simulates different degrees of loose connection in the circuit, which is convenient for vehicle testing and helps to form a unified testing standard.

[0018] The movement of the slide is achieved by rotating a lead screw driven by a motor. This method is simple in structure, offers high control precision, and is easy to implement. To improve stability, a guide rail can be installed inside the housing, on which the slide slides. The guide rail also prevents the slide from rotating along with the lead screw.

[0019] In the above-mentioned electrical fault simulation device, the housing is provided with two first terminals, one of which is connected to a fixed contact and the other of which is connected to a moving contact. A first relay is provided between one of the terminals and the fixed contact or between the other of the first terminals and the moving contact.

[0020] In the above-mentioned electrical fault simulation device, the housing is further provided with two second mounting bases and a wire connected between the two second mounting bases. The housing is provided with two second terminals. One end of the wire is connected to one of the second terminals, and the other end of the wire is connected to the other second terminal. A second relay is provided between one end of the wire and one of the second terminals or between the other end of the wire and the other second terminal.

[0021] Each of the first and second mounting bases contains a conductor.

[0022] The first and second terminal blocks facilitate connection to the vehicle's wiring.

[0023] In the aforementioned electrical fault simulation device, a tube cover is provided between the two second mounting bases, covering the conductor. The tube cover provides a certain degree of protection.

[0024] In the above-mentioned electrical fault simulation device, one of the first mounting bases is provided with a fixed sleeve sleeved outside the fixed contact, and the other first mounting base is provided with a movable sleeve sleeved outside the moving contact. The fixed sleeve and the movable sleeve are parallel and nested together.

[0025] Both the fixed sleeve and the movable sleeve are made of transparent material and are nested together, allowing observation of the physical phenomena at the contact point when a loose connection occurs, while also providing a certain degree of protection.

[0026] The aforementioned electrical fault simulation device also includes a control panel, wherein the signal input terminals of the motor, the first relay, and the second relay are respectively connected to the signal output terminals of the control panel.

[0027] The control panel is equipped with operation buttons for controlling the forward and reverse rotation of the motor and the on / off state of the first and second relays; the control panel is also equipped with a display screen that can at least show the working status of the relays. The control panel allows for easy operation by controlling the motor and relays.

[0028] This electrical fault simulation device can simulate not only short circuits but also loose connections in the circuit. To simulate a loose connection, simply activate the first relay; to simulate a short circuit, activate the second relay.

[0029] Compared with existing technologies, this line electrical fault simulation device has the following advantages:

[0030] It can be used to simulate different degrees of poor connection conditions in the line, as well as to simulate short circuit conditions in the line, which facilitates vehicle inspection and helps to form a unified inspection standard. As the depth of the lap groove gradually changes, when the moving contact moves, the contact area between the lap protrusion and the lap groove changes linearly, which improves the accuracy of simulating poor connection conditions in the line. The structure is simple, the control precision is high, and it is easy to implement by driving the lead screw to rotate by a motor. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the line electrical fault simulation device provided by the present invention.

[0032] Figure 2 This is a schematic diagram of the structure of the fixed contact provided by the present invention.

[0033] Figure 3 This is a schematic diagram of the structure of the moving contact provided by the present invention.

[0034] In the diagram, 1. Housing; 2. Fixed contact; 21. Overlap groove; 22. Beveled surface; 23. First end face; 3. Moving contact; 31. Overlap protrusion; 41. First mounting base; 42. Second mounting base; 5. Slide; 61. Lead screw; 62. Motor; 71. First terminal block; 72. Second terminal block; 81. First relay; 82. Second relay; 9. Wire; 11. Fixed sleeve; 12. Moving sleeve; 13. Control panel; 14. Metal core; 15. Insulating shell; 16. External spline. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] Example 1

[0037] like Figure 1 The circuit electrical fault simulation device shown includes a housing 1, a slide 5 disposed within the housing 1, and two first mounting bases 41, one of which is mounted on the slide 5. A fixed contact 2 is provided on the first mounting base 41 fixed within the housing 1, and a moving contact 3 is provided on the first mounting base 41 fixed on the slide 5, the moving contact 3 overlapping the fixed contact 2.

[0038] like Figure 1As shown, the fixed contact 2 is cylindrical and the moving contact 3 is cylindrical. The fixed contact 2 and the moving contact 3 are parallel. The fixed contact 2 is provided with an overlapping groove 21 extending in a straight line. The moving contact 3 is provided with an overlapping protrusion 31 that slides with the overlapping groove 21. The moving contact 3 can move along the length direction of the overlapping groove 21 under the action of the driving component provided in the housing 1.

[0039] One of the first mounting bases 41 is equipped with a fixed sleeve 11 that is fitted over the fixed contact 2, and the other first mounting base 41 is equipped with a movable sleeve 12 that is fitted over the moving contact 3. The fixed sleeve 11 and the movable sleeve 12 are parallel to each other and parallel to the fixed contact 2, and the fixed sleeve 11 and the movable sleeve 12 are nested together. Both the fixed sleeve 11 and the movable sleeve 12 are made of transparent material, which allows observation of the physical phenomenon of the contact point when a loose connection occurs, and at the same time provides a certain degree of protection.

[0040] Each first mounting base 41 contains a conductor.

[0041] Both the moving contact 3 and the fixed contact 2 include a metal core 14 and an insulating shell 15. The fixed end of both the fixed contact 2 and the moving contact 3 and the first mounting base 41 has a section of the metal core 14 extending out. The metal core 14 is connected to the conductor, and an external spline 16 is provided on the extended part of the metal core 14. Correspondingly, an internal spline groove is provided on the first mounting base 41. During assembly, the moving contact 3 and the fixed contact 2 are inserted into the corresponding internal spline grooves, which greatly increases the contact area of ​​the moving contact 3 and the first mounting base 41, and at the same time enables circumferential positioning, ensuring the structural strength of the installation.

[0042] like Figure 2 As shown, the fixed contact 2 has a beveled surface 22, and an overlap groove 21 is provided on the beveled surface 22. The distance from the bottom of the overlap groove 21 to the beveled surface 22 gradually decreases to zero from one end of the overlap groove 21 to the other end. Because the depth of the overlap groove 21 gradually changes, when the moving contact 3 moves, the contact area between the overlap protrusion 31 and the overlap groove 21 changes linearly, improving the accuracy of simulating circuit malfunctions.

[0043] like Figure 2 As shown, the overlap groove 21 is a V-shaped groove. The intersection line formed by the intersection of the two inner surfaces of the V-shaped groove extends along the movement direction of the moving contact 3. The distance from this intersection line to the oblique surface 22 gradually decreases to zero from one end of the overlap groove 21 to the other end. Figure 3 As shown, the overlapping protrusion 31 is a V-shaped protrusion, and the two outer sides of the V-shaped protrusion slide and engage with the two inner sides of the V-shaped groove respectively.

[0044] like Figure 2As shown, the deeper end of the lap groove 21 has a first end face 23, and the lap protrusion 31 has a second end face (not shown in the figure) corresponding to the first end face 23. When the first end face 23 and the second end face are in contact, the contact area between the moving contact 3 and the fixed contact 2 reaches its maximum.

[0045] like Figure 1 As shown, the drive assembly includes a lead screw 61 housed within the housing 1 and a motor 62 for driving the lead screw 61 to rotate. The lead screw 61 passes through and is threadedly connected to the slide 5, and is parallel to the moving contact 3. When the motor 62 operates, it drives the lead screw 61 to rotate, which in turn causes the slide 5 to translate, changing the contact area between the moving contact 3 and the fixed contact 2. This simulates different degrees of loose wiring, facilitating vehicle inspection and contributing to the formation of a unified inspection standard.

[0046] To improve stability, a guide rail can be installed inside the housing 1, and the slide block 5 is slidably mounted on the guide rail. By installing the guide rail, it is also possible to prevent the slide block 5 from rotating together with the lead screw 61.

[0047] like Figure 1 As shown, the housing 1 is provided with two first terminal blocks 71. One terminal block is connected to the conductor in the first mounting base 41 with the fixed contact 2, and the other first terminal block 71 is connected to the conductor in the first mounting base 41 with the moving contact 3. A first relay 81 is provided between the terminal block and the moving contact 3.

[0048] like Figure 1 As shown, a control panel 13 is provided on the outside of the housing 1. The first signal output terminal of the control panel 13 is electrically connected to the signal input terminal of the relay, and the second signal output terminal of the control panel 13 is electrically connected to the signal input terminal of the motor 62. The control panel 13 is provided with operation buttons for controlling the forward and reverse rotation of the motor 62 and controlling the on or off of the first relay 81; the control panel 13 is also provided with a display screen that can at least show the operating status of the relay. The operation of the motor 62 and the relay can be controlled through the control panel 13, which is convenient for operation.

[0049] like Figure 1 As shown, two second mounting seats 42 are also provided inside the housing 1. A conductor is installed in each second mounting seat 42, and a wire 9 is provided between the two second mounting seats 42. One end of the wire 9 is connected to the conductor. Figure 1 As shown, two second terminal blocks 72 are also provided on the housing 1. One second terminal block 72 is connected to one of the conductors, and the other second terminal block 72 is connected to the other conductor. A second relay 82 is provided between one of the second terminal blocks 72 and the second mounting base 42. The third signal output terminal of the control panel 13 is electrically connected to the signal input terminal of the relay.

[0050] The first terminal block 71 and the second terminal block 72 facilitate connection to the vehicle's wiring.

[0051] A tube cover is provided between the two second mounting bases 42 and fitted over the conductor 9.

[0052] This electrical fault simulation device can simulate not only short circuits in the line, but also loose connections in the line.

[0053] When it is necessary to simulate a loose connection in the line, the vehicle's lines are connected to two first terminal blocks 71 respectively. The control panel 13 controls the first relay 81 to conduct, and the motor 62 drives the slide block 5 to move, so that the contact area between the overlapping protrusion 31 and the overlapping groove 21 changes linearly, which can improve the accuracy of simulating a loose connection in the line.

[0054] When it is necessary to simulate a short circuit in the circuit, connect the vehicle's circuit to the two second terminal blocks 72 respectively, and control panel 13 controls the second relay 82 to conduct.

[0055] Example 2

[0056] The structural principle of this embodiment is basically the same as that of embodiment one. The difference is that the overlap groove 21 is a U-shaped groove, a C-shaped groove or other shaped groove, and the cross-sectional shape of the overlap protrusion 31 is the same as the cross-sectional shape of the overlap groove 21, and the two slide together.

[0057] Example 3

[0058] The structural principle of this embodiment is basically the same as that of Embodiment 1. The difference is that the fixed contact 2 is provided with a first contact plane, and the moving contact 3 is provided with a second contact plane. The first contact plane contacts the second contact plane, and the driving component can drive the moving contact 3 to move or rotate. When the driving component drives the moving contact 3 to move, its direction of movement is parallel to the contact plane. When the driving component drives the moving contact 3 to rotate, its rotation centerline is perpendicular to the contact plane.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A line electrical fault simulation apparatus, characterized by, The utility model relates to a contactor, including shell (1), be located in the fixed contact (2) and movable contact (3) of shell (1), the movable contact (3) is overlapped with fixed contact (2), the shell (1) still is equipped with the drive assembly for driving movable contact (3) movement to change the drive assembly of movable contact (3) with fixed contact (2) overlap area, the movable contact (3) / fixed contact (2) is set up and is overlapped with the overlap groove (21) of linear extension, the fixed contact (2) / movable contact (3) is equipped with and is overlapped with the overlap projection (31) of overlap groove (21) sliding cooperation, the drive assembly drives movable contact (3) along overlap groove (21) length direction movement can make the contact area of overlap projection (31) with overlap groove (21) linear change, the movable contact (3) / fixed contact (2) is equipped with bevel (22), overlap groove (21) is located on this bevel (22), the distance of overlap groove (21) groove bottom to bevel (22) gradually reduces to zero from one end of overlap groove (21) to the other end, overlap groove (21) is V groove, the intersection line formed by the intersection of the two inner sides of V groove extends along the movement direction of movable contact (3), the distance of this intersection line to bevel (22) gradually reduces to zero from one end of overlap groove (21) to the other end, overlap projection (31) is V projection, the two outer sides of V projection are slidably matched with the two inner sides of V groove respectively.

2. The line electrical fault simulation apparatus according to claim 1, characterized by, The end with the deeper depth of overlap groove (21) has a first end face (23), and the overlap projection (31) has a second end face arranged correspondingly to the first end face (23). When the first end face (23) abuts against the second end face, the contact area of the movable contact (3) and the fixed contact (2) reaches the maximum.

3. The line electrical fault simulation apparatus of claim 1, wherein, The shell (1) is provided with two first mounting seats (41) and a sliding seat (5). The fixed contact (2) is in a cylindrical shape and arranged on one of the first mounting seats (41). The movable contact (3) is in a cylindrical shape and arranged on the other first mounting seat (41). The fixed contact (2) is parallel to the movable contact (3). The overlap groove (21) extends along the axial direction of the fixed contact (2). The other first mounting seat (41) is arranged on the sliding seat (5). The drive assembly drives the sliding seat (5) to move along the axial direction of the movable contact (3).

4. The line electrical fault simulation apparatus of claim 3, wherein, The drive assembly comprises a lead screw (61) arranged in the shell (1) and a motor (62) for driving the lead screw (61) to rotate. The lead screw (61) is arranged in the sliding seat (5) and threadedly connected with the sliding seat (5). The lead screw (61) is parallel to the movable contact (3).

5. The line electrical fault simulation apparatus of claim 1, wherein, The shell (1) is provided with two first wire holders (71). One of the first wire holders (71) is connected with the fixed contact (2), and the other first wire holder (71) is connected with the movable contact (3). A first relay (81) is arranged between one of the first wire holders (71) and the fixed contact (2) or between the other first wire holder (71) and the movable contact (3).

6. The line electrical fault simulation apparatus of claim 1, wherein, Two second mounting seats (42) are arranged in the shell (1), and a wire (9) is connected between the two second mounting seats (42); two second wire holders (72) are arranged on the shell (1), one end of the wire (9) is connected with one of the second wire holders (72), and the other end of the wire (9) is connected with the other second wire holder (72); and a second relay (82) is arranged between one end of the wire (9) and one of the second wire holders (72) or between the other end of the wire (9) and the other second wire holder (72).

7. The line electrical fault simulation apparatus of claim 3, wherein, One of the first mounting seats (41) is provided with a fixed sleeve (11) sleeved outside the fixed contact (2), and the other first mounting seat (41) is provided with a movable sleeve (12) sleeved outside the movable contact (3); the fixed sleeve (11) is parallel to the movable sleeve (12); and the fixed sleeve (11) and the movable sleeve (12) are nested together.

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