High-voltage distribution box with mistaken touch prevention function

Abstract

The utility model relates to the technical field of new energy automobile high voltage, and discloses a high-voltage distribution box with a mistaken touch prevention function, a covering surface of a box body is provided with an ejector rod, the box body is internally provided with a safety support capable of shielding a microswitch on a triggering side of the microswitch, and the safety support is provided with a sliding channel for the ejector rod to penetrate through in a penetrating manner; the safety support is provided with a mistaken touch prevention mechanism which is used for sealing the sliding channel to prevent foreign objects from penetrating through the safety support, and the safety support which shields the microswitch can enable the sliding channel to become the unique channel capable of triggering the microswitch. When the mistaken touch prevention mechanism unlocks the sliding channel, the cover opening protection function and the cover closing conduction function of the high-voltage distribution box can be normally achieved through the ejector rod on the sealing cover. On the contrary, when the sealing cover is opened and the sliding channel is closed by the mistaken touch prevention mechanism, the situation that foreign objects mistakenly touch the microswitch through the sliding channel can be effectively avoided, and therefore the operation safety of the maintenance personnel is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile high pressure technical field especially relates to a high voltage distribution box with anti -touch function of mistake. BACKGROUND

[0002] New energy vehicles are mainly characterized by electrification, and its high voltage system is one of the core components to realize electrification. In recent years, with the continuous development of new energy vehicle technology, the core three electric systems are also continuously high-voltage. In order to ensure the safety of high voltage circuit power supply, avoid damage to drivers or maintenance personnel and vehicles, comprehensive safety redundancy design of each high voltage system component of the vehicle is needed. Among them, the high voltage distribution box is a device used for distributing power between the power battery and the power component. The utility model patent with publication number CN216886290U discloses a similar high voltage distribution box.

[0003] In order to realize the cover opening protection function, the traditional high voltage distribution box is usually designed with a high voltage interlock loop. High voltage interlock (HVIL-High Voltage Interlock) is a safety function, which mainly checks the integrity and continuity of the entire high voltage system loop through low voltage signals, identifies the abnormal disconnection of the loop, and timely cuts off the control electrical devices of the high voltage input end. Specifically, as shown in Figure 1 The high voltage distribution box includes a box body 1 and a cover 2 covering the top of the box body 1, and a control module 27 is arranged in the box body 1. The control module 27 is connected in series with the external high voltage power supply DC2 and is coupled with the power component 28 arranged outside the box body 1. Through the built-in program of the control module 27, the power distribution of the high voltage power supply DC2 can be realized to realize the normal power supply of each power component 28. The high voltage interlock loop includes a relay KA and a normally open micro switch SQ1, and the coil of the relay KA and the micro switch SQ1 are connected in series with the power supply loop of the external low voltage power supply DC1. The normally open contact KA-1 of the relay KA is connected in series with the high voltage power supply DC2. The cover 2 is provided with a top rod 5, and when the cover 2 is closed on the box body 1, the top rod 5 can press the moving contact 22 of the micro switch SQ1 to drive the micro switch SQ1 to close, thereby turning on the power supply loop of the low voltage power supply DC1, so that the relay KA is powered on, thereby driving the normally open contact KA-1 of the relay KA to close, thereby turning on the power supply loop of the high voltage power supply DC2, so that the control module 27 can normally operate, thereby realizing power distribution. Conversely, when the cover 2 is opened, the top rod 5 can be separated from the micro switch SQ1 to reset the micro switch SQ1, thereby cutting off the coil of the relay KA, so that the normally open contact KA-1 of the relay KA loses power and resets, thereby cutting off the high voltage power supply DC2, thereby realizing the cover opening protection, and thereby improving the operation safety of the maintenance personnel.

[0004] However, in actual operation, there is still a risk of mis-touching the micro switch SQ1, causing the high-voltage power supply DC2 to continue to power on, which may cause serious high-voltage safety accidents, and thus needs to be improved. Content of the utility model

[0005] The high-voltage distribution box with the anti-mis-touch function can reduce the risk of mis-touching the micro switch under the premise of realizing the cover opening protection, thereby improving the operation safety.

[0006] To solve the above technical problems, the utility model solves through the following technical scheme:

[0007] The high-voltage distribution box with the anti-mis-touch function comprises a box body and a cover that covers the box body, the box body is internally provided with a high-voltage interlocking loop, the high-voltage interlocking loop comprises a micro switch, the covering surface of the box body is provided with a top rod, the box body is internally provided with a safety bracket capable of shielding the micro switch on the triggering side of the micro switch, and a sliding channel for the top rod to pass through is penetrated in the safety bracket; when the cover covers the box body, the top rod can pass through the sliding channel and trigger the micro switch; conversely, when the cover is opened, the top rod can be separated from the micro switch and the sliding channel, so that the micro switch is reset; and the safety bracket is provided with an anti-mis-touch mechanism for closing the sliding channel to prevent foreign matters from passing through the safety bracket.

[0008] By adopting the above scheme, the safety bracket shielding the micro switch can make the sliding channel become the only channel capable of triggering the micro switch. When the anti-mis-touch mechanism unlocks the sliding channel, the top rod on the cover can normally realize the cover opening protection function and the cover closing conduction function of the high-voltage distribution box. Conversely, when the cover is opened and the anti-mis-touch mechanism closes the sliding channel, foreign matters can be effectively prevented from mis-touching the micro switch through the sliding channel, thereby ensuring the operation safety of the maintenance personnel.

[0009] Preferably, the anti-mis-touch mechanism comprises a lock hole penetrating the side wall of the sliding channel and a padlock hung in the lock hole to close the sliding channel.

[0010] By adopting the above scheme, the padlock has simple structure, convenient operation and low cost, can effectively close the sliding channel, and can only be unlocked by the matched key to restore the sliding channel, thereby ensuring the operation safety.

[0011] Preferably, the anti-mis-touch mechanism comprises a locking hole opened in the side wall of the safety bracket and communicating with the sliding channel, a locking block slidingly penetrating in the locking hole, an elastic driving assembly connected to the locking block to drive the locking block to cut off the sliding channel along the locking hole, and a locking assembly for locking the elastic driving assembly to maintain the cutting-off state of the locking block.

[0012] With the above scheme, when the ejector rod is separated from the safety support with the opening of the cover, the locking block can automatically cut off the sliding channel under the driving of the elastic driving assembly, thereby improving the operation efficiency and convenience. By locking the elastic driving assembly with the locking assembly, the locking block can be maintained in the cut-off state, so that the locking block cannot be actively retracted, thereby further improving the operation safety.

[0013] As a preferred, the end of the ejector rod is provided with a first guide slope, and the end of the locking block is provided with a second guide slope above the position thereof, for being pressed by the first guide slope to drive the locking block to retreat.

[0014] With the above scheme, when the ejector rod enters the sliding channel with the closing of the cover, the extrusion effect of the first guide slope and the second guide slope can drive the locking block to automatically retreat against the elastic force of the elastic driving assembly, thereby further improving the operation efficiency and convenience.

[0015] As a preferred, the elastic driving assembly comprises a sliding rod arranged at the tail end of the locking block, a guide sleeve arranged in the box body for the sliding rod to slide through, and an elastic member arranged between the guide sleeve and the locking block to make the locking block have a tendency to move away from the guide sleeve.

[0016] With the above scheme, the elastic member arranged between the guide sleeve and the locking block can provide stable elastic support force for the locking block. The sliding cooperation between the sliding rod and the guide sleeve can ensure the stability and smoothness of the locking block during extension and retraction, and can also play a role in resisting distortion of the elastic member, so that the supporting elastic force of the elastic member is more concentrated, thereby improving the elastic support performance.

[0017] As a preferred, the guide sleeve is provided with a guide hole for the sliding rod to slide through, and the end of the sliding rod away from the locking block is provided with an anti-disengagement member for preventing the sliding rod from disengaging from the guide hole.

[0018] With the above scheme, the sliding rod can be stably stayed in the guide sleeve, avoiding the problem of disassembly of the elastic driving assembly.

[0019] As a preferred, the elastic member is a compression spring, and the two ends of the compression spring are pressed against the opposite surfaces of the locking block and the guide sleeve, respectively.

[0020] With the above scheme, the compression spring has simple structure, convenient installation and low cost, and it can provide stable and lasting elastic support force for the locking block, further improving the performance of the elastic member.

[0021] As a preferred, the locking assembly comprises a locking screw threaded through the side wall of the guide sleeve and threaded through the sliding rod.

[0022] Adopting the above scheme, the screw structure is simple, easy to install and low in cost, the screw rod and the guide sleeve can be fixedly connected, and manual removal is required, so that the anti-mis-touch effect is strong, and the operation safety of the maintenance personnel is further improved.

[0023] As preferred, the side wall of the guide sleeve is provided with a through hole for the locking screw to pass through, and the rod body of the screw rod is provided with a threaded hole for the locking screw to threadedly connect.

[0024] Adopting the above scheme, the locking screw can be stably connected to the guide sleeve, and the fixing of the screw rod is completed.

[0025] The utility model discloses a safety support for shielding microswitch, which can make the sliding channel become the only channel for triggering the microswitch. When the anti-mis-touch mechanism unlocks the sliding channel, the top rod on the cover can normally realize the cover opening protection function and cover closing conduction function of the high-voltage distribution box. Conversely, when the cover is opened and the anti-mis-touch mechanism closes the sliding channel, foreign matters can be effectively prevented from touching the microswitch through the sliding channel, thereby ensuring the operation safety of the maintenance personnel. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a structural schematic diagram of a high-voltage distribution box in the prior art;

[0027] Figure 2 Fig. 2 is an exploded view of the high-voltage distribution box in the prior art; Figure 1 ;

[0028] Figure 3 Fig. 3 is a structural schematic diagram of the high-voltage distribution box in the prior art;

[0029] Figure 4 Fig. 4 is an enlarged schematic diagram of part A shown in Fig. 3; Figure 3

[0030] Fig. 5 is a structural schematic diagram of the high-voltage distribution box in the prior art; Figure 5 ; Figure 2

[0031] Fig. 6 is an exploded view of the high-voltage distribution box in the prior art; Figure 6

[0032] Fig. 7 is an enlarged schematic diagram of part B shown in Fig. 6; Figure 7 Figure 6 Fig. 8 is a structural schematic diagram of the high-voltage distribution box in the prior art;

[0033] Figure 8 Figure 1 Fig. 9 is an enlarged schematic diagram of part C shown in Fig. 8;

[0034] Figure 9 Fig. 10 is a structural schematic diagram of the high-voltage distribution box in the prior art; Figure 8

[0035] ​​​Figure 10 This is a schematic diagram of the structure of Embodiment 2. Figure 2 ;

[0036] Figure 11 for Figure 10 An enlarged schematic diagram of part D is shown.

[0037] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Box body; 2. Cover; 3. High-voltage interlock circuit; 4. Micro switch; 5. Top rod; 6. Safety bracket; 7. Sliding channel; 8. Padlock; 9. Locking hole; 10. Locking block; 11. First guide slope; 12. Second guide slope; 13. Slide rod; 14. Guide sleeve; 15. Elastic element; 16. Guide hole; 17. Anti-detachment element; 18. Locking screw; 19. Through hole; 20. Threaded hole; 21. Fastening screw; 22. Moving contact; 23. Locking beam; 24. Connecting seat; 25. Locking hole; 26. Pressing surface; 27. Control module; 28. Power component. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] like Figures 2 to 5 As shown, this embodiment discloses a high-voltage distribution box with anti-accidental contact function, including a box body 1 and a cover 2 that closes to the box body 1. The cover 2 is fixed to the upper opening of the box body 1 by fastening screws 21. A high-voltage interlock circuit 3 is provided inside the box body 1. The high-voltage interlock circuit 3 includes a micro switch 4 fixed to the inner wall of the box body 1, with the moving contact 22 of the micro switch 4 facing upward. The connection relationship and working principle between the micro switch 4 and the high-voltage interlock circuit 3 are existing technologies and do not involve any improvement points of this utility model, so they will not be described in detail. A top rod 5 located above the micro switch 4 is integrally provided on the cover surface of the box body 1 near the edge. A safety bracket 6 is also fixed to the inner wall of the box body 1, located above the micro switch 4 to form a shield on the trigger side of the micro switch 4. A sliding channel 7 for the top rod 5 to pass through the safety bracket 6 is also provided. In this embodiment, when the cover 2 is closed on the box body 1, the push rod 5 can pass through the sliding channel 7 and press against the moving contact 22 of the micro switch 4 to trigger the micro switch 4, thereby connecting the high-voltage interlock circuit 3 and powering the high-voltage distribution box back on. Conversely, when the cover 2 is opened, the push rod 5 can disengage from the micro switch 4 and the sliding channel 7 to release the moving contact 22 of the micro switch 4, thereby resetting the micro switch 4 and cutting off the high-voltage interlock circuit 3, thus realizing the cover-opening protection function of the high-voltage distribution box.

[0041] To prevent maintenance personnel from accidentally touching the microswitch 4 and causing a high-voltage safety accident, the safety bracket 6 is equipped with an anti-accidental contact mechanism to seal the sliding channel 7 and prevent foreign objects from passing through the safety bracket 6. Specifically, the anti-accidental contact mechanism includes a lock hole 25 penetrating the side wall of the sliding channel 7 and a padlock 8 hooked in the lock hole 25 to seal the sliding channel 7. When the cover 2 is opened, the top rod 5 on the cover 2 disengages from the sliding channel 7, exposing the sliding channel 7. At this time, the locking beam 23 of the padlock 8 is unlocked and inserted into the lock hole 25, and then the locking beam 23 is locked, thereby sealing the sliding channel 7 and preventing foreign objects from accidentally touching the microswitch 4 through the sliding channel 7, making the operation of maintenance personnel safer.

[0042] After the high-voltage distribution box is repaired, first unlock the padlock 8 with the key (not shown), then remove the lock beam 23 from the lock hole 25 to unlock the sliding channel 7 again. At this time, the cover 2 can be closed back onto the box body 1 so that the top rod 5 can pass through the sliding channel 7 to trigger the micro switch 4, thereby powering the high-voltage distribution box back on.

[0043] Example 2

[0044] like Figures 6 to 11 As shown, the difference from Embodiment 1 is that the anti-accidental contact mechanism includes a locking hole 9 opened on the side wall of the safety bracket 6 and connected to the sliding channel 7, a locking block 10 that slides through the locking hole 9, an elastic drive component connected to the locking block 10 to drive the locking block 10 to cut off the sliding channel 7 along the locking hole 9, and a locking component for locking the elastic drive component to keep the locking block 10 in the cut-off state.

[0045] To achieve automatic retraction of the locking block 10, a first guide slope 11 is provided at the end of the push rod 5, and a second guide slope 12 is provided at the end of the locking block 10 and above it, for the first guide slope 11 to press against and drive the locking block 10 to retract. The end of the first guide slope 11 is provided with a pressing plane 26 for pressing against the moving contact 22 of the micro switch 4, thereby ensuring the accuracy of the push rod 5 triggering the micro switch 4.

[0046] In this embodiment, the elastic drive assembly includes a slide rod 13 fixed to the tail end of the locking block 10 along the direction of movement of the locking block 10; a guide sleeve 14 fixed to the inner wall of the housing 1 via a connecting seat 24 for the slide rod 13 to slide through; and an elastic element 15 disposed between the guide sleeve 14 and the locking block 10 to give the locking block 10 a tendency to move away from the guide sleeve 14. The guide sleeve 14 has a guide hole 16 for the slide rod 13 to slide through. An anti-disengagement element 17 is provided at the end of the slide rod 13 away from the locking block 10 to prevent the slide rod 13 from disengaging from the guide hole 16. The anti-disengagement element 17 is disc-shaped, and its outer diameter is larger than the diameter of the guide hole 16, thereby providing a limiting function. The elastic element 15 is a compression spring, with its two ends pressing against the opposing surfaces of the locking block 10 and the guide sleeve 14, respectively.

[0047] In order to ensure the locking effect of the locking assembly, the locking assembly comprises a locking screw 18 which is threaded through the side wall of the guide sleeve 14 and the slide rod 13. Specifically, the side wall of the guide sleeve 14 is provided with a through hole 19 for the locking screw 18 to pass through, and the rod body of the slide rod 13 is provided with a threaded hole 20 for the locking screw 18 to be screwed into.

[0048] The specific use process is as follows:

[0049] When the high-voltage distribution box is maintained, the four fastening screws 21 on the cover 2 are first removed to release the locking of the cover 2. Then, the cover 2 is opened longitudinally to make the top rod 5 disengage from the moving contact 22 of the micro switch 4 and be pulled out of the sliding channel 7 of the safety bracket 6. At this time, the elastic member 15 can drive the locking block 10 to enter the sliding channel 7 along the locking hole 9 to cut off the sliding channel 7, thereby preventing foreign objects from accidentally touching the micro switch 4 through the sliding channel 7. In this state, the threaded hole 20 on the slide rod 13 is directly opposite to the through hole 19 on the guide sleeve 14, so as to facilitate the maintenance personnel to pass the locking screw 18 into the through hole 19 and screw it into the threaded hole 20 by using a screwdriver (not shown), thereby completing the fixation of the slide rod 13 and making the locking block 10 unable to actively retract, further improving the operation safety.

[0050] After the maintenance of the high-voltage distribution box is completed, the locking screw 18 is first unscrewed from the threaded hole 20 and the through hole 19 to release the locking of the slide rod 13. Then, the cover 2 is re-laid on the box body 1 to drive the top rod 5 to insert into the sliding channel 7 of the safety bracket 6 and press the second guide slope 12 on the locking block 10 through the first guide slope 11 on the top rod 5, thereby driving the locking block 10 to retract against the elastic force of the elastic member 15 until the top rod 5 is completely inserted into the sliding channel 7 and abuts against the moving contact 22 of the micro switch 4, so as to trigger the micro switch 4 to make the high-voltage distribution box re-powered. At this time, the cover 2 can be re-fixed by the fastening screws 21.

Claims

1. A high-voltage distribution box with an anti-mis-touch function, comprising a box body (1) and a cover (2) covering the box body (1), a high-voltage interlocking circuit (3) is arranged in the box body (1), the high-voltage interlocking circuit (3) comprises a micro switch (4), a top rod (5) is arranged on the covering surface of the box body (1), characterized in that: The box body (1) is provided with a safety bracket (6) capable of shielding the micro switch (4) on the triggering side of the micro switch (4), and a sliding channel (7) is formed through the safety bracket (6) for the top rod (5) to pass through; when the cover (2) is closed on the box body (1), the top rod (5) can pass through the sliding channel (7) and trigger the micro switch (4); on the contrary, when the cover (2) is opened, the top rod (5) can be separated from the micro switch (4) and the sliding channel (7), so that the micro switch (4) is reset; the safety bracket (6) is provided with an anti-misoperation mechanism for closing the sliding channel (7) to prevent foreign matters from passing through the safety bracket (6).

2. The high-voltage distribution box with an anti-mis-touch function according to claim 1, characterized in that: The anti-misoperation mechanism comprises a lock hole (25) formed through the side wall of the sliding channel (7) and a padlock (8) hung on the lock hole (25) to close the sliding channel (7).

3. The high-voltage distribution box with an anti-mis-touch function according to claim 1, characterized in that: The anti-misoperation mechanism comprises a locking hole (9) formed in the side wall of the safety bracket (6) and communicating with the sliding channel (7), a locking block (10) slidingly arranged in the locking hole (9), an elastic driving assembly connected to the locking block (10) to drive the locking block (10) to cut off the sliding channel (7) along the locking hole (9), and a locking assembly for locking the elastic driving assembly to maintain the locking block (10) in the cut-off state.

4. The high-voltage distribution box with an anti-mis-touch function according to claim 3, characterized in that: The end of the top rod (5) is provided with a first guide slope (11), and the end of the locking block (10) is provided with a second guide slope (12) above the position thereof for the first guide slope (11) to abut against to drive the locking block (10) to retreat.

5. The high-voltage distribution box with mistaken touch prevention function according to claim 3 or 4, characterized in that: The elastic driving assembly comprises a sliding rod (13) arranged at the tail end of the locking block (10), a guide sleeve (14) arranged in the box body (1) for the sliding rod (13) to slide through, and an elastic member (15) arranged between the guide sleeve (14) and the locking block (10) to make the locking block (10) have a tendency to move away from the guide sleeve (14).

6. The high-voltage distribution box with an anti-mis-touch function according to claim 5, characterized in that: The guide sleeve (14) is provided with a guide hole (16) for the sliding rod (13) to slide through, and the end of the sliding rod (13) away from the locking block (10) is provided with an anti-disengagement member (17) for preventing the sliding rod (13) from disengaging from the guide hole (16).

7. The high-voltage distribution box with an anti-mis-touch function according to claim 5, characterized in that: The elastic member (15) is a compression spring, and the two ends of the compression spring abut against the opposite surfaces of the locking block (10) and the guide sleeve (14), respectively.

8. The high-voltage distribution box with an anti-mis-touch function according to claim 5, characterized in that: The locking assembly comprises a locking screw (18) arranged through the side wall of the guide sleeve (14) and threadedly arranged in the sliding rod (13).

9. The high-voltage distribution box with an anti-mis-touch function according to claim 8, characterized in that: The side wall of the guide sleeve (14) is provided with a through hole (19) for the locking screw (18) to pass through, and the shank of the sliding rod (13) is provided with a threaded hole (20) for the locking screw (18) to threadedly screw.

Images