Terminal harness continuity test equipment

Abstract

This invention relates to the field of terminal wire harness continuity testing, specifically to a terminal wire harness continuity testing device, including a base and a bracket. A support groove is formed along the length of the bracket on its upper part, with one end of the groove open. Multiple terminal wire harnesses are evenly arranged along the extension direction of the support groove, passing through it. An extension plate is fixed vertically at the lower part of the support groove, with the extension plates evenly arranged along the extension direction of the groove and a first gap between adjacent extension plates. A second gap exists between adjacent individual wire harnesses within the terminal wire harness, the size of which is equal to the size of the first and second gaps. A wire management unit is also provided below the support groove, located on the side of the terminal wire harness away from the extension plates. The wire management unit includes a pressing rod that moves horizontally. This invention reduces the workload during testing and avoids damage to the terminal wire harness during automatic testing.

Description

Technical Field

[0001] This invention relates to the field of terminal wire harness continuity testing, and more specifically to a terminal wire harness continuity testing device. Background Technology

[0002] Wire harness products may have issues such as short circuits, open circuits, and missing connections during the manufacturing process. Therefore, wire continuity testing must be performed before the products leave the factory. Different functional wire harness products require different test circuit connection structures, and the structure of the continuity fixtures used for testing also varies. When clamping wire harnesses with tubular terminals, clamps are often used to hold the product in place. However, after repeated clamping, the clamps are prone to loosening and falling off, leading to insufficient terminal contact and inaccurate connections. Furthermore, ensuring secure clamping inevitably results in complex structures, making clamping difficult and reducing testing efficiency.

[0003] Chinese patent CN218037270U discloses a continuity tester for a tubular terminal wire harness, which includes a fixture box and a display. The fixture box is provided with a locking structure and a connecting socket. One end of the connecting socket and the locking structure inside the box is connected to a connecting wire, which is inserted into the display. The locking structure includes an upper movable member, a spring, and a lower fixed member. One end of the lower fixed member extends into the fixture box, and the other end extends out of the fixture box. The lower fixed member is provided with a first through hole. The spring is disposed inside the upper movable member. The upper movable member is detachably covered by the lower fixed member. The upper movable member is provided with a second through hole. The size of both the first through hole and the second through hole is larger than the diameter of the tubular terminal.

[0004] The above solution uses a movable component to clamp the wire harness, which is a staggered clamping method. This means that the clamping force on the wire harness is distributed in a staggered manner. Therefore, to ensure clamping stability, a large clamping force is required, which can easily damage the wire harness subjected to such staggered force. To avoid damage, the clamping force needs to be reduced, but this compromises clamping stability and affects the final test results. Many existing terminal wire harnesses have interfaces at both ends, not single wires. During measurement, the connection is simply completed by plugging the interfaces at both ends of the wire harness into the test socket. However, the above connection requires manual intervention. Manual wiring is labor-intensive, and inaccurate connections can damage test sockets, reducing their lifespan. Automated wiring, on the other hand, cannot secure flexible terminal harnesses, leading to cross-contamination during testing. This causes misalignment between the terminal harness interfaces and the test equipment interfaces. Even if a limiting device aligns the interfaces, it cannot straighten the harness, resulting in loose connections and damage to standard-compliant harnesses during testing. Summary of the Invention

[0005] To address the aforementioned issues, a terminal wire harness continuity testing device is provided. This device pre-sorts individual wires within the terminal wire harness using a pressing rod and an extension plate, then automatically connects the upper and lower interfaces of the terminal wire harness to the device. This allows for automatic continuity testing of the terminal wire harness without damaging it. This reduces the workload during testing and prevents damage to the terminal wire harness during automated testing.

[0006] To address the problems of existing technologies, this invention provides a terminal wire harness continuity testing device, including a base and a bracket disposed on the upper part of the base; a support groove is formed on the upper part of the bracket along the length direction of the bracket, one end of the support groove is open, and multiple terminal wire harnesses are evenly arranged on the support groove along the extension direction of the support groove, the terminal wire harnesses passing through the support groove; an extension plate is fixedly disposed vertically at the lower part of the support groove, the extension plates are evenly arranged along the extension direction of the support groove, and there is a first gap between adjacent extension plates; there is a second gap between adjacent single wire harnesses in the terminal wire harness, the size of the first gap is equal to the size of the second gap; a wire management unit is also disposed below the support groove, the wire management unit is located on the side of the terminal wire harness away from the extension plate, the wire management unit includes a pressing rod that moves horizontally, the pressing rod passes through the second gap and the first gap in sequence when moving horizontally, and then the pressing rod moves vertically from top to bottom.

[0007] Preferably, a lifting frame is vertically movable on one side of the support, and a lifting unit for driving the lifting frame to move is provided on the lifting frame. There is a highest position on the vertical movement path of the lifting frame. A first linear actuator is horizontally arranged on the lifting frame, and the output end of the first linear actuator is horizontally facing the extension plate. A pressing rod is fixedly arranged on the output end of the first linear actuator. When the lifting frame is at the highest position, the upper end face of the pressing rod is coplanar with the lower end face of the support groove. When the first linear actuator drives the pressing rod to extend, the lifting frame is at the highest position.

[0008] Preferably, the vertical movement path of the lifting frame also includes a lowest position, and the distance between the highest and lowest positions of the lifting frame is the same as the length of the terminal harness.

[0009] Preferably, the lifting unit includes a threaded rod and a rotary driver. The threaded rod is provided vertically on one side of the bracket, the threaded rod passes through the lifting frame and is threadedly engaged with the lifting frame, and a rotary driver for driving the threaded rod to rotate is provided at the upper end of the threaded rod.

[0010] Preferably, an upper connecting seat is provided on the upper part of the bracket, and a second linear actuator is provided on the upper part of the upper connecting seat for driving the upper connecting seat to move in the vertical direction. When the pressing rod is not extended, the upper connecting seat is at the highest position of the upper connecting seat movement path. After the pressing rod is extended, the upper connecting seat descends in the vertical direction to the lowest position of the upper connecting seat movement path.

[0011] Preferably, a lower connecting seat is provided at the lower part of the support in a vertical direction. The lower connecting seat has a highest position and a lowest position on its movement path. When the lifting frame descends to the lowest position of the lifting frame, the lower connecting seat is at the lowest position of the lower connecting seat.

[0012] Preferably, mounting plates are horizontally fixed on the side walls on both sides of the lower connecting seat. A wedge block is vertically movable on the upper part of the mounting plate. A sliding rod is vertically fixed on the lower part of the wedge block. The sliding rod passes through the mounting plate vertically and slides with the mounting plate vertically. There is a gap between the upper end of the sliding rod and the mounting plate. A spring is provided in the gap along the extension direction of the sliding rod. The two ends of the spring are fixedly connected to the mounting plate and the upper part of the sliding rod, respectively. The side of the upper part of the wedge block closest to the lower connecting seat is inclined towards the lower connecting seat.

[0013] Preferably, when the lifting frame is in its lowest position, a fixing unit is provided on one side of the bracket. The fixing unit includes a fixing plate that moves along the width direction of the support groove. A fourth linear actuator for driving the fixing plate to move is horizontally provided on one side of the fixing plate. A fixing block is fixedly provided at the lower part of the pressing rod. The fixing block and the fixing plate clamp the lower interface of the terminal wire harness.

[0014] Preferably, multiple indicator lights are provided on the side wall of the bracket. The number of indicator lights corresponds to the number of terminal wire harnesses arranged on the support groove. The upper connector, lower connector and indicator lights are connected in series. When the terminal wire harness is conductive, the indicator light is lit. When the terminal wire harness is not conductive, the indicator light is not lit.

[0015] Preferably, a slot is provided on one side of the opening end of the support groove along the width direction of the support groove, and an insert plate is slidably provided on the slot along the extension direction of the slot.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. During testing, the terminal wire harnesses are pushed into the support groove sequentially from one end. The upper and lower interfaces of the terminal wire harnesses are located at the upper and lower parts of the support groove, respectively. The support groove can accommodate a rated number of terminal wire harnesses. After the rated number of terminal wire harnesses are pushed into the support groove sequentially, the testing equipment is started. The testing equipment includes an upper connecting seat located on the upper part of the bracket and a lower connecting seat located at the lower part of the bracket. When the testing equipment is started, the upper connecting seat gradually descends vertically and connects with the upper interface of the terminal wire harness. Since the terminal wire harnesses arranged on the support groove are suspended in the support groove, the upper interface of the terminal wire harness is tightly fitted with the upper part of the bracket, and there is no tilting of the terminal wire harness interface. When the upper connecting seat connects with the upper interface of the terminal wire harness, the pressing rod also moves horizontally. The pressing rod passes through the second gap and the first gap in sequence, and then moves vertically from top to bottom. The two connectors move downwards through the gap, straightening multiple individual wires in the terminal harness and correcting any bends. The lower connector then rises and connects to the lower interface of the terminal harness. An indicator light is mounted on the bracket and connected in series with the lower connector. When the upper connector is powered on, the indicator light illuminates if there is no continuity issue in the terminal harness; otherwise, it remains off. This allows for automatic continuity testing of the terminal harness without damage, reducing workload and preventing damage during automated testing.

[0018] 2. By setting a wedge block on one side of the lower connector, the inclined structure on the upper part of the wedge block corrects the lower interface of the terminal wire harness, so that the lower interface of the corrected terminal wire harness can be smoothly connected to the lower connector. The spring set at the lower part of the wedge block can provide the wedge block with movement play in the vertical direction, avoiding the situation where the wedge block excessively squeezes the lower interface of the terminal wire harness when correcting it. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a terminal wire harness continuity testing device.

[0020] Figure 2 It is a terminal wire harness continuity testing device Figure 1 A magnified view of a portion of point A in the middle.

[0021] Figure 3 It is a terminal wire harness continuity testing device Figure 1 A magnified view of a portion of point B in the middle.

[0022] Figure 4 This is a side view of a terminal wire harness continuity testing device.

[0023] Figure 5 It is a terminal wire harness continuity testing device Figure 4 A cross-sectional view at point CC.

[0024] Figure 6 It is a terminal wire harness continuity testing device Figure 5 A magnified view of a portion of point D.

[0025] Figure 7 This is a cross-sectional three-dimensional schematic diagram of a terminal wire harness continuity testing device in the testing state.

[0026] Figure 8 This is a three-dimensional schematic diagram of a terminal wire harness continuity testing device after removing the bracket and base.

[0027] Figure 9 It is a terminal wire harness continuity testing device Figure 8 A magnified view of a portion of point E in the middle.

[0028] Figure 10 This is a cross-sectional three-dimensional schematic diagram showing the separation of the upper connector from the upper interface of the terminal wire harness after the completion of a continuity test on a terminal wire harness testing device.

[0029] Figure 11 This is a cross-sectional three-dimensional schematic diagram of a terminal wire harness continuity testing device when the pressing rod has just passed through the second gap.

[0030] Figure 12 It is a terminal wire harness continuity testing device Figure 11 A magnified view of a portion of point F in the middle.

[0031] Figure 13 This is a cross-sectional three-dimensional schematic diagram of the pressing rod of a terminal wire harness continuity testing device accurately descending after passing through the second gap.

[0032] Figure 14 It is a terminal wire harness continuity testing device Figure 13 A magnified view of a portion of point G in the middle.

[0033] The numbers on the map are:

[0034] 1. Base; 2. Bracket; 21. Support groove; 22. Extension plate; 23. Cable management unit; 231. Pressing rod; 232. First linear actuator; 233. Lifting frame; 234. Lifting unit; 2341. Threaded rod; 2342. Rotary actuator; 2343. Guide rod; 24. Indicator light; 25. Insert plate; 3. Terminal harness; 4. Upper connector; 41. Second linear actuator; 5. Lower connector; 51. Third linear actuator; 52. Wedge block; 53. Mounting plate; 54. Sliding rod; 55. Spring; 6. Fixing unit; 61. Fixing block; 62. Fixing plate; 63. Fourth linear actuator. Detailed Implementation

[0035] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1 , Figure 2 , Figure 10 , Figure 12 and Figure 14 A terminal wire harness continuity testing device includes a base 1 and a bracket 2 disposed on the upper part of the base 1. A support groove 21 is formed on the upper part of the bracket 2 along the length direction of the bracket 2, and one end of the support groove 21 is open. A plurality of terminal wire harnesses 3 are evenly arranged on the support groove 21 along the extension direction of the support groove 21, and the terminal wire harnesses 3 pass through the support groove 21. An extension plate 22 is fixedly disposed vertically on the lower part of the support groove 21. The extension plates 22 are evenly arranged along the extension direction of the support groove 21, and adjacent extension plates are fixedly arranged in a fixed manner. There is a first gap between the plates 22, and there is a second gap between adjacent single wires in the terminal wire harness 3. The size of the first gap is equal to the size of the second gap. A wire management unit 23 is also provided below the support groove 21. The wire management unit 23 is located on the side of the terminal wire harness 3 away from the extension plate 22. The wire management unit 23 includes a pressing rod 231 that moves in the horizontal direction. When the pressing rod 231 moves in the horizontal direction, it passes through the second gap and the first gap in sequence. Then the pressing rod 231 moves from top to bottom in the vertical direction.

[0037] Terminal harness 3 consists of multiple individual wire harnesses, each with a small diameter. In its finished state, terminal harness 3 has interfaces at both ends, with multiple terminal harnesses 3 typically mounted on a single interface. Existing wire harness continuity testing usually tests individual wire harnesses. However, this method is only applicable to wire harnesses with larger diameters and cannot be applied to terminal harness 3. This is because the diameter of terminal harness 3 is small, making it impossible to guarantee stable fixation when testing individual terminal harnesses 3. Furthermore, since terminal harnesses 3 are usually bundled and numerous, testing individual terminal harnesses 3 is labor-intensive and cannot guarantee accurate test results. For finished terminal harness 3, the interfaces at both ends of the terminal harness 3 are usually connected to the test equipment. The connection process requires manual operation. The interface at the end of the terminal harness 3 needs to be flush with the interface on the test equipment before connection. However, during manual testing, it is impossible to ensure that the structure at the end of the terminal harness 3 and the interface on the test equipment are flush during connection. As a result, wear will occur during connection, causing the interface of the test equipment to loosen after long-term testing, which in turn leads to connection failure of the test equipment and ultimately results in deviation of the test results.

[0038] To avoid the aforementioned issues, the testing equipment was further improved to reduce wear on the interface of the testing equipment during connection of the terminal wire harness 3. During testing, the terminal wire harness 3 is pushed sequentially into the support groove 21 from the open end. The terminal wire harness 3 is not a single wire harness, but consists of multiple wire harnesses, with each end of the multiple wire harnesses having two interfaces. That is, the terminal wire harness 3 being tested here is in its finished product state. The upper interface and lower interface of the terminal wire harness 3 are located at the upper and lower parts of the support groove 21, respectively. The support groove 21 can accommodate a rated number of terminal wire harnesses 3. After the rated number of terminal wire harnesses 3 are pushed sequentially into the support groove 21, the testing equipment is started. The testing equipment includes an upper connecting seat 4 located on the upper part of the bracket 2 and a lower connecting seat 5 located at the lower part of the bracket 2.

[0039] When the test equipment is started, the upper connector 4 gradually descends vertically and connects to the interface on the upper part of the terminal harness 3. Since the terminal harness 3 arranged on the support groove 21 is suspended on the support groove 21, the upper interface of the terminal harness 3 is tightly fitted with the upper part of the bracket 2, and there will be no tilting of the interface of the terminal harness 3, which ensures that the upper connector 4 can be stably connected to the interface on the upper part of the terminal harness 3. When the upper connector 4 is connected to the interface on the upper part of the terminal harness 3, the pressing rod 231 will also move horizontally. It is worth noting that at the beginning of the test, when the terminal harness 3 is pushed into the support groove 21 in sequence, the pressing rod 231 is located on one side of the support groove 21. This allows the terminal harness 3 to move smoothly along the extension direction of the support groove 21. After the terminal harness 3 is placed, the pressing rod 231 located on one side of the support groove 21 begins to move. The pressing rod 231 moves horizontally toward the extension plate 22. During the movement of the pressing rod 231, the pressing rod 231 passes through the second gap and the first gap in sequence. Usually, the multiple single wires in the terminal harness 3 will be intertwined. If the wires are not straightened during the test, the interface between the terminal harness 3 will be disconnected during the test. The pressing rod 231 can avoid the above situation. When the pressing rod 231 moves horizontally, it passes between adjacent single wires in the terminal wire harness 3. The extension plate 22 on one side of the terminal wire harness 3 is used to support the single wires. If there is a bending phenomenon between adjacent single wires in the terminal wire harness 3, and there is no extension plate 22 on one side of the terminal wire harness 3, when the pressing rod 231 moves horizontally towards the terminal wire harness 3, the bent single wire in the horizontal wire harness 3 will be pushed open by the pressing rod. However, after the extension plate 22 is set, the single wire in the horizontal wire harness 3 is blocked by the extension plate 22, so that the pressing rod 231 can pass between adjacent single wires, that is, the pressing rod 231 can pass smoothly through the second gap. At this point, the pressing rod 231, located in the second gap, is at the upper end of the single wire harness. The pressing rod 231 then moves vertically downwards within the second gap. The length of the terminal wire harness 3 is its rated size, and the distance the pressing rod 231 descends is the same as the rated length of the terminal wire harness 3. When the pressing rod 231 descends to its lowest position, the terminal wire harness 3 can be fully straightened. Subsequently, the lower connector 5 rises and connects to the interface at the lower part of the terminal wire harness 3.

[0040] An indicator light 24 is installed on the bracket 2, connected in series with the lower connector 5. The upper connector 4 is then energized. If the terminal harness 3 has no continuity issues, the indicator light 24 illuminates; if the terminal harness 3 has continuity issues, the indicator light 24 does not illuminate. This allows for automatic continuity testing of the terminal harness 3 without damaging it. This reduces the workload during testing and prevents damage to the terminal harness 3 during automatic testing.

[0041] Reference Figure 7 and Figure 10 A lifting frame 233 is vertically movable on one side of the support 2. A lifting unit 234 for driving the lifting frame 233 to move is provided on the lifting frame 233. There is a highest position on the vertical movement path of the lifting frame 233. A first linear actuator 232 is horizontally arranged on the lifting frame 233. The output end of the first linear actuator 232 is horizontally facing the extension plate 22. The pressing rod 231 is fixedly arranged on the output end of the first linear actuator 232. When the lifting frame 233 is at the highest position, the upper end face of the pressing rod 231 is coplanar with the lower end face of the support groove 21. When the first linear actuator 232 drives the pressing rod 231 to extend, the lifting frame 233 is at the highest position.

[0042] The first linear actuator 232 is preferably a linear servo electric cylinder. Since the individual wires in the terminal wire harness 3 may bend and deviate, the deviation of the individual wire harness closer to the interface position is smaller. Thus, the pressing rod 231 can pass through the second gap at that position more easily. However, the further away the individual wire harness is from the interface position, the greater the deviation of the individual wire harness. During the process of the pressing rod 231 extending towards the second gap, there may be a situation where the deviation of the individual wire harness is too large and it cannot pass through the second gap smoothly. In this way, during the process of straightening the terminal wire harness 3 by pressing rod 231, the upper end face of the lifting frame 233 and the lower end face of the support groove 21 are coplanar, which ensures that the pressing rod 231 can pass smoothly between the individual wire harnesses, thereby ensuring the subsequent straightening effect of the pressing rod 231 on the terminal wire harness 3.

[0043] Reference Figures 1-14 The vertical movement path of the lifting frame 233 also includes the lowest position, and the distance between the highest and lowest positions of the lifting frame 233 is the same as the length of the terminal harness 3.

[0044] This ensures that the descent distance of the lifting frame 233 is the same as the length of the terminal wire harness 3. In this way, when the lifting frame 233 descends to the lowest position, the extended pressing rod 231 presses against the interface at the lower part of the terminal wire harness 3. Subsequently, when the lower connecting seat 5 rises, it can be normally connected to the interface at the lower part of the terminal wire harness 3.

[0045] Reference Figure 2 and Figure 5 The lifting unit 234 includes a threaded rod 2341 and a rotary driver 2342. The threaded rod 2341 is arranged vertically on one side of the bracket 2. The threaded rod 2341 passes through the lifting frame 233 and is threadedly engaged with the lifting frame 233. The rotary driver 2342 for driving the threaded rod 2341 to rotate is arranged at the upper end of the threaded rod 2341.

[0046] The lifting unit 234 also includes a guide rod 2343, which is parallel to the axis of the threaded rod 2341 and positioned on one side of the threaded rod 2341. The guide rod 2343 passes through the lifting frame 233, and the lifting frame 233 slides in contact with the guide rod 2343. The rotary driver 2342 is preferably a servo motor. When the lifting frame 233 needs to be moved, the rotary driver 2342 is activated, driving the threaded rod 2341 to rotate. The guide rod 2343, located on one side of the threaded rod 2341, limits the movement of the lifting frame 233, ensuring that the lifting frame 233 can only move vertically. After the threaded rod 2341 rotates, the lifting frame 233 begins to descend from its highest position. Notably, when the lifting frame 233 is at its highest position, the linear driver first extends the pressing rod 231, causing it to pass through the second gap and the first gap in sequence, after which the lifting frame 233 begins to descend.

[0047] Reference Figure 1 and Figure 4 An upper connecting seat 4 is provided on the upper part of the bracket 2. A second linear actuator 41 for driving the upper connecting seat 4 to move vertically is provided on the upper connecting seat 4. When the pressing rod 231 is not extended, the upper connecting seat 4 is at the highest position of the upper connecting seat 4's moving path. After the pressing rod 231 is extended, the upper connecting seat 4 descends vertically to the lowest position of the upper connecting seat 4's moving path.

[0048] When the upper connector 4 descends to its lowest position, it can connect with the upper interface of the terminal wire harness 3. When the terminal wire harness 3 is pushed in sequentially from the opening of the support groove 21, the upper connector 4 is at its highest position. In this way, the upper connector 4 makes room for the movement of the terminal wire harness 3 on the support groove 21, ensuring that the terminal wire harness 3 can be smoothly pushed into the support groove 21.

[0049] Reference Figure 4-Figure 6 A lower connecting seat 5 is provided at the lower part of the support 2 in a vertical direction. The lower connecting seat 5 has a highest position and a lowest position on its movement path. When the lifting frame 233 descends to the lowest position of the lifting frame 233, the lower connecting seat 5 is at the lowest position of the lower connecting seat 5.

[0050] Reference Figure 6Mounting plates 53 are horizontally fixed on the side walls of both sides of the lower connecting seat 5. A wedge block 52 is vertically movable on the upper part of the mounting plate 53. A sliding rod 54 is vertically fixed on the lower part of the wedge block 52. The sliding rod 54 passes through the mounting plate 53 vertically and slides with the mounting plate 53 vertically. There is a gap between the upper end of the sliding rod 54 and the mounting plate 53. A spring 55 is provided in the gap along the extension direction of the sliding rod 54. The two ends of the spring 55 are fixedly connected to the upper part of the mounting plate 53 and the sliding rod 54, respectively. The upper part of the wedge block 52 is inclined towards the lower connecting seat 5 on the side closer to the lower connecting seat 5.

[0051] When the lifting frame 233 lowers the pressing rod 231 to its lowest position, the lower connecting seat 5 is at its lowest position on its moving path. At this point, the pressing rod 231 is in contact with the upper part of the lower interface of the terminal harness 3, and the terminal harness 3 is in a straightened state. However, the lower interface of the terminal harness 3 is not connected to the lower connecting seat 5. This is because during the process of the pressing rod 231 straightening the terminal harness 3, the terminal harness 3 will slightly shift along the width direction of the support groove 21. Therefore, the lower interface of the terminal harness 3 cannot connect with the lower connecting seat 5. To avoid the aforementioned situation, wedge blocks 52 are provided on both sides of the lower connector 5 to ensure a smooth connection of the connector 5. The inclined structure on the upper part of the wedge block 52 corrects the lower interface of the terminal wire harness 3, enabling the lower interface of the corrected terminal wire harness 3 to connect smoothly with the lower connector 5. The spring 55 provided at the lower part of the wedge block 52 provides vertical movement play for the wedge block 52, preventing excessive compression of the lower interface of the terminal wire harness 3 when the wedge block 52 corrects it.

[0052] Reference Figure 8 , Figure 9 and Figure 11 When the lifting frame 233 is in its lowest position, a fixing unit 6 is provided on one side of the bracket 2. The fixing unit 6 includes a fixing plate 62 that moves along the width direction of the support groove 21. A fourth linear actuator 63 for driving the fixing plate 62 to move is horizontally provided on one side of the fixing plate 62. A fixing block 61 is fixedly provided at the lower part of the pressing rod 231. The fixing block 61 and the fixing plate 62 clamp the lower interface of the terminal wire harness 3.

[0053] After testing, the lower interface of the terminal harness 3 and the lower connector 5 need to be separated. The upper interface of the terminal harness 3 and the upper connector 4 can be separated manually. However, the lower connector 5 has wedge blocks 52 on both sides, and the lower interface of the terminal harness 3 is located inside the bracket 2, making manual separation impossible. Therefore, the lower interface of the terminal harness 3 needs to be fixed by the fixing unit 6. Then, the lower connector 5 descends, allowing the lower interface of the terminal harness 3 to separate smoothly from the lower connector 5. After testing, When the fixing unit 6 is activated, the fourth linear driver 63 drives the fixing plate 62 to move toward the lower interface of the terminal wire harness 3 and presses the lower interface of the terminal wire harness 3 onto the fixing block 61. Then the lower connector 5 descends. Because the lower interface of the terminal wire harness 3 is clamped by the fixing block 61 and the fixing plate 62, it will not be pulled by the lower connector 5. This avoids the lower connector 5 from exerting a pulling force on the wire harness in the terminal wire harness 3 when it descends, and thus avoids the terminal wire harness 3 from breaking during the separation process between the lower connector 5 and the lower interface of the terminal wire harness 3.

[0054] Reference Figure 6 and Figure 7 Multiple indicator lights 24 are provided on the side wall of the bracket 2. The number of indicator lights 24 corresponds to the number of terminal wire harnesses 3 arranged on the support groove 21. The upper connecting seat 4, the lower connecting seat 5 and the indicator lights 24 are connected in series. When the terminal wire harness 3 is conductive, the indicator lights 24 light up. When the terminal wire harness 3 is not conductive, the indicator lights 24 cannot light up.

[0055] The number of terminal wire harnesses 3 when the support slot 21 is full corresponds one-to-one with the number of indicator lights 24. The staff can determine the continuity of the terminal wire harnesses 3 by observing whether the indicator lights 24 are on or off.

[0056] Reference Figure 3 A slot is provided on one side of the opening end of the support groove 21 along the width direction of the support groove 21, and an insert plate 25 is slidably provided on the slot along the extension direction of the slot.

[0057] Before the staff pushes the terminal wire harness 3 into the support groove 21 one by one, the insert plate 25 set in the slot needs to be removed. Then, the terminal wire harness 3 is pushed into the support groove 21 one by one. When the support groove 21 is full of terminal wire harness 3, the insert plate 25 is inserted into the slot. At this time, the insert plate 25 has a limiting effect on the terminal wire harness 3, that is, the terminal wire harness 3 located in the support groove 21 will no longer move along the extension direction of the support groove 21, ensuring that the upper connector 4 can be smoothly connected to the upper interface of the terminal wire harness 3.

[0058] Working principle: During testing, the terminal wire harness 3 is pushed into the support groove 21 from one end of the support groove 21 in sequence. The upper and lower interfaces of the terminal wire harness 3 are located at the upper and lower parts of the support groove 21, respectively. The support groove 21 can accommodate a rated number of terminal wire harnesses 3. After the rated number of terminal wire harnesses 3 are pushed into the support groove 21 in sequence, the testing equipment is started. The testing equipment includes an upper connecting seat 4 located on the upper part of the bracket 2 and a lower connecting seat 5 located on the lower part of the bracket 2. When the test equipment is started, the upper connector 4 gradually descends vertically and connects to the interface at the top of the terminal harness 3. Since the terminal harness 3, arranged on the support groove 21, is suspended on the support groove 21, the upper interface of the terminal harness 3 is tightly fitted to the upper part of the bracket 2, preventing any tilting of the terminal harness 3 interface. When the upper connector 4 connects to the interface at the top of the terminal harness 3, the pressing rod 231 also moves horizontally. The pressing rod 231 passes through the second gap and the first gap in sequence, and then moves vertically from top to bottom. Moving downwards within the second gap, the system straightens multiple individual wires in the terminal harness 3, straightening any bent wires. The lower connector 5 then rises and connects to the lower interface of the terminal harness 3. An indicator light 24 is mounted on the bracket 2 and connected in series with the lower connector 5. The upper connector 4 is then energized. If the terminal harness 3 has no continuity issues, the indicator light 24 illuminates; if there are continuity issues, the indicator light 24 does not illuminate. This allows for automatic continuity testing of the terminal harness 3 without damage, reducing workload and preventing damage during automatic testing.

[0059] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A terminal wire harness continuity testing device, comprising a base (1) and a bracket (2) disposed on the upper part of the base (1); Its features are, A support groove (21) is provided on the upper part of the bracket (2) along the length direction of the bracket (2). One end of the support groove (21) is open. Multiple terminal wire harnesses (3) are evenly arranged on the support groove (21) along the extension direction of the support groove (21). The terminal wire harnesses (3) pass through the support groove (21). An extension plate (22) is fixedly provided on the lower part of the support groove (21) along the vertical direction. The extension plates (22) are evenly arranged along the extension direction of the support groove (21), and there is a first gap between adjacent extension plates (22). There is a second gap between adjacent single wires in the terminal wire harness (3). The size of the first gap is equal to the size of the second gap. A wire management unit (23) is also provided below the support groove (21). The wire management unit (23) is located on the side of the terminal wire harness (3) away from the extension plate (22). The wire management unit (23) includes a pressing rod (231) that moves in the horizontal direction. When the pressing rod (231) moves in the horizontal direction, it passes through the second gap and the first gap in sequence. Then the pressing rod (231) moves from top to bottom in the vertical direction. A lifting frame (233) is provided on one side of the support (2) in a vertical direction, and a lifting unit (234) is provided on the lifting frame (233); An upper connecting seat (4) is provided on the upper part of the bracket (2). A second linear actuator (41) for driving the upper connecting seat (4) to move vertically is provided on the upper part of the upper connecting seat (4). When the pressing rod (231) is not extended, the upper connecting seat (4) is at the highest position of the upper connecting seat (4) movement path. After the pressing rod (231) is extended, the upper connecting seat (4) descends vertically to the lowest position of the upper connecting seat (4) movement path. A lower connecting seat (5) is provided at the lower part of the support (2) in a vertical direction. The lower connecting seat (5) has a highest position and a lowest position on its movement path. When the lifting frame (233) descends to the lowest position of the lifting frame (233), the lower connecting seat (5) is at the lowest position of the lower connecting seat (5). Mounting plates (53) are horizontally fixed on the side walls on both sides of the lower connecting seat (5). A wedge block (52) is vertically movable on the upper part of the mounting plate (53). A sliding rod (54) is vertically fixed on the lower part of the wedge block (52). The sliding rod (54) passes through the mounting plate (53) vertically and slides with the mounting plate (53) vertically. There is a gap between the upper end of the sliding rod (54) and the mounting plate (53). A spring (55) is provided in the gap along the extension direction of the sliding rod (54). The two ends of the spring (55) are fixedly connected to the upper part of the mounting plate (53) and the upper part of the sliding rod (54), respectively. The side of the upper part of the wedge block (52) near the lower connecting seat (5) is inclined towards the lower connecting seat (5).

2. The terminal wire harness continuity testing device according to claim 1, characterized in that, There is a highest position on the vertical movement path of the lifting frame (233). A first linear driver (232) is horizontally arranged on the lifting frame (233). The output end of the first linear driver (232) is horizontally facing the extension plate (22). The pressing rod (231) is fixedly arranged on the output end of the first linear driver (232). When the lifting frame (233) is at the highest position, the upper end face of the pressing rod (231) is flush with the lower end face of the support groove (21). When the first linear driver (232) drives the pressing rod (231) to extend, the lifting frame (233) is at the highest position.

3. The terminal wire harness continuity testing device according to claim 2, characterized in that, The vertical movement path of the lifting frame (233) also includes the lowest position, and the distance between the highest and lowest positions of the lifting frame (233) is the same as the length of the terminal harness (3).

4. The terminal wire harness continuity testing device according to claim 2, characterized in that, The lifting unit (234) includes a threaded rod (2341) and a rotary driver (2342). The threaded rod (2341) is provided vertically on one side of the bracket (2). The threaded rod (2341) passes through the lifting frame (233) and is threadedly engaged with the lifting frame (233). A rotary driver (2342) for driving the threaded rod (2341) to rotate is provided at the upper end of the threaded rod (2341).

5. A terminal wire harness continuity testing device according to claim 2, characterized in that, When the lifting frame (233) is in its lowest position, a fixing unit (6) is provided on one side of the bracket (2). The fixing unit (6) includes a fixing plate (62) that moves along the width direction of the support groove (21). A fourth linear actuator (63) for driving the fixing plate (62) to move is horizontally provided on one side of the fixing plate (62). A fixing block (61) is fixedly provided at the lower part of the pressing rod (231). The fixing block (61) and the fixing plate (62) clamp the lower interface of the terminal wire harness (3).

6. The terminal wire harness continuity testing device according to claim 1, characterized in that, Multiple indicator lights (24) are provided on the side wall of the bracket (2). The number of indicator lights (24) corresponds to the number of terminal wire harnesses (3) arranged on the support groove (21). The upper connector (4), the lower connector (5) and the indicator lights (24) are electrically connected to each other and connected in series. When the terminal wire harness (3) is conducting, the indicator light (24) lights up. When the terminal wire harness (3) is not conducting, the indicator light (24) cannot light up.

7. The terminal wire harness continuity testing device according to claim 1, characterized in that, A slot is provided on one side of the opening end of the support groove (21) along the width direction of the support groove (21), and an insert plate (25) is slidably provided on the slot along the extension direction of the slot.

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