MSD manual maintenance switch protection plug

Abstract

The invention relates to the technical field of MSD manual maintenance switches, in particular to an MSD manual maintenance switch protection plug. The invention discloses an MSD manual maintenance switch protection plug, which comprises a plug, convex teeth, a left self-locking piece and a right self-locking piece, and is characterized in that the left self-locking piece and the right self-locking piece are in sliding connection along respective length directions, are oppositely arranged and are mutually limited, so that the left self-locking piece and the right self-locking piece are opened and closed along limiting grooves. The convex teeth and the shell are integrally formed, follow-up welding is not needed, production convenience is improved, the left self-locking piece and the right self-locking piece which can be opened and closed are additionally arranged, sliding connection among the convex teeth, the left self-locking piece and the right self-locking piece is limited so that the bolts can be shielded and exposed, the first threaded holes in the base and the bolts can be covered through the shields, and the sealing effect is good. And the safety lock is added to lock the positions of the left self-locking piece and the right self-locking piece in the closed state, so that the risk that the plug is pulled out by misoperation of people is reduced, and further protection is provided for the MSD manual maintenance switch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of MSD manual maintenance switch, and particularly relates to a MSD manual maintenance switch protection plug. BACKGROUND

[0002] The MSD manual maintenance switch is arranged on a support frame of a new energy battery pack and is a key safety device in a high-voltage system of a new energy vehicle, that is, can be used as a maintenance protection switch and can also be used for short circuit protection. The MSD manual maintenance switch can quickly cut off a high-voltage power supply during maintenance of the battery pack, realize electrical isolation and provide short circuit protection, and ensure personnel safety and vehicle safety. The MSD manual maintenance switch provides safety and reliable guarantee for maintenance of an electric vehicle power system through high-voltage circuit system maintenance and short circuit protection. The MSD manual maintenance switch mainly comprises a plug and a socket, the socket is located on the support frame, and the plug is plugged into the socket. A bolt passes through a shell of the plug and is connected with a shell of the socket, so that the plug and the socket are fixed together.

[0003] The bolted MSD manual maintenance switch is usually used for high-voltage circuit system maintenance and short circuit protection. During maintenance, the circuit system is first powered off, then the bolt is disassembled, and then the plug and the socket of the MSD manual maintenance switch are disconnected, and then the circuit is maintained to ensure personnel safety.

[0004] However, in actual use, if the circuit system is not powered off and the bolt of the manual maintenance switch is disassembled and the plug and the socket are disconnected, there is a risk of safety of the operator due to high voltage and large current in the circuit system. Therefore, how to protect the MSD manual maintenance switch and prevent the manual maintenance switch from being disassembled by mistake and other related safety problems are problems to be solved by technicians in the technical field.

[0005] In summary, the bolted MSD manual maintenance switch in the prior art does not have other safety protection measures, and there is a certain safety hazard in use. SUMMARY

[0006] The present application aims to provide a MSD manual maintenance switch protection plug to solve the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a MSD manual maintenance switch protection plug, comprising: A plug is used for plugging with a socket and comprises a shell and a base. The base is located at the bottom end of the shell, and a threaded hole one is symmetrically distributed on the base for the bolt to pass through. The top of the bolt is located above the base. A plurality of protrusions are distributed on both sides of the shell along the length direction of the shell. In each side of the protrusions, the gap between two adjacent protrusions is a limiting groove. The self-locking piece includes a self-locking groove, and the top of the self-locking piece is surrounded by the self-locking groove in the cross section of the width direction of the shell, and the self-locking piece is located above the base; The self-locking piece includes a left self-locking piece and a right self-locking piece, the left self-locking piece and the right self-locking piece are connected in the length direction of each self-locking piece, the left self-locking piece and the right self-locking piece are oppositely arranged and limited to each other, so that the left self-locking piece and the right self-locking piece are opened and closed along the limiting groove, and the bottom of the corresponding self-locking piece is exposed or shields the threaded hole and the bolt; The safety lock is used for locking the position of the self-locking piece by cooperating with the top of the bolt when the left self-locking piece and the right self-locking piece are closed.

[0008] Further, the left self-locking piece includes a left cover, two left limiting connecting rods and a left shielding seat, the lengths of the two left limiting connecting rods are consistent, but the outer contour shapes are different, the left cover and the left shielding seat are respectively distributed at the two ends of the left limiting connecting rod in the length direction of the left limiting connecting rod, and the left cover is located at the top end of the left limiting connecting rod, and the left shielding seat is located at the bottom end of the left limiting connecting rod.

[0009] Further, the right self-locking piece includes a right cover, two right limiting connecting rods and a right shielding seat, the lengths of the two right limiting connecting rods are consistent, but the outer contour shapes are different, the right cover and the right shielding seat are respectively distributed at the two ends of the right limiting connecting rod in the length direction of the right limiting connecting rod, and the right cover is located at the top end of the right limiting connecting rod, and the right shielding seat is located at the bottom end of the corresponding right limiting connecting rod.

[0010] Further, the right cover is located between the left cover and the left shielding seat, and the left cover is located between the right cover and the right shielding seat; the left shielding seat and the right shielding seat are both provided with a shielding groove and a baffle, and the baffle is located between the two shielding grooves on the same side in the length direction of the shell, and is used for intercepting the top of the bolt to cooperate with the safety lock to lock the position of the self-locking piece when the left self-locking piece and the right self-locking piece are closed.

[0011] Further, when the top of the left self-locking piece and the right self-locking piece is close to each other, the bottom of the left self-locking piece and the right self-locking piece is far away from each other.

[0012] Further, in the protruding teeth on each side, the width of the protruding teeth gradually increases from bottom to top.

[0013] Further, the shell is symmetrically provided with a side plate on both sides, and the side plate is located at the center of the shell in the length direction of the shell, and is used for limiting the position of the left self-locking piece and the right self-locking piece when the left self-locking piece and the right self-locking piece are opened.

[0014] Further, the key of the safety lock is kept by a specific person.

[0015] Further, the self-locking groove comprises a self-locking groove one in the left cover and a self-locking groove two in the right cover, the top of the self-locking groove one and the self-locking groove two is matched with the convex tooth, the outer contour of the left limiting connecting rod and the right limiting connecting rod on the same side is matched with each other, and the outer contour of the left limiting connecting rod and the right limiting connecting rod is also matched with the convex tooth of the corresponding height, so as to limit the sliding connection among the convex tooth, the left self-locking piece and the right self-locking piece.

[0016] Further, the top end of the left cover and the right cover is provided with a safety ring for the safety lock to pass through.

[0017] Compared with the prior art, the beneficial effects of the present application are: The present application comprises a plug, a convex tooth, a left self-locking piece and a right self-locking piece, the left self-locking piece and the right self-locking piece are slidingly connected along the respective length direction, the left self-locking piece and the right self-locking piece are oppositely arranged and limited to each other, so that the left self-locking piece and the right self-locking piece are opened and closed along the limiting groove. The convex tooth is integrally formed with the shell, without subsequent welding, improving the convenience of production, increasing the left self-locking piece and the right self-locking piece which can be opened and closed, limiting the sliding connection among the convex tooth, the left self-locking piece and the right self-locking piece, shielding and exposing the bolt, covering the threaded hole one and the bolt on the base by shielding, and increasing the position of the left self-locking piece and the right self-locking piece in the locked closed state of the safety lock, reducing the risk of the plug being pulled out by mistake, and providing further protection for the MSD manual maintenance switch. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present application; Figure 2 It is a structural schematic diagram of the shell in an embodiment of the present application; Figure 3 It is a plan view of an embodiment of the present application; Figure 4 It is a structural schematic diagram of a self-locking piece in an embodiment of the present application; Figure 5 It is an exploded view of a self-locking piece in an embodiment of the present application; In the figure: 1, plug; 2, self-locking groove; 3, convex tooth; 4, limiting groove; 6, left self-locking piece; 7, right self-locking piece; 8, safety lock; 9, safety ring; 10, shell; 11, base; 12, threaded hole one; 13, shielding groove; 14, baffle; 2a, self-locking groove one; 2b, self-locking groove two; 15, handle; 601, left cover; 602, left limiting connecting rod; 603, left shielding seat; 701, right cover; 702, right limiting connecting rod; 703, right shielding seat. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application. Figures 1-5 The present application provides a technical solution: a MSD manual maintenance switch protection plug, comprising: A plug 1 is used for plugging with a socket, comprising a shell 10 and a base 11, the base 11 is located at the bottom end of the shell 10, and the base 11 is symmetrically provided with threaded holes one 12 for bolts to pass through, and the top of the bolt is located above the base 11; A plurality of teeth 3 are distributed on both sides of the shell 10 along the length direction of the shell 10; in each of the teeth 3 on the side, the gap between two adjacent teeth 3 is a limiting groove 4; A self-locking piece comprises a self-locking groove 2, the top of the self-locking piece is wrapped around the cross section of the shell 10 in the width direction through the self-locking groove 2, and the self-locking piece is located above the base 11; The self-locking piece comprises a left self-locking piece 6 and a right self-locking piece 7, the left self-locking piece 6 and the right self-locking piece 7 are slidingly connected along the respective length directions, the left self-locking piece 6 and the right self-locking piece 7 are oppositely placed and limited to each other, so that the left self-locking piece 6 and the right self-locking piece 7 are opened and closed along the limiting groove 4, and the bottom of the corresponding self-locking piece is exposed or shields the threaded hole one 12 and the bolt; A safety lock 8 is used for cooperating with the top of the bolt to lock the position of the self-locking piece when the left self-locking piece 6 and the right self-locking piece 7 are closed.

[0021] It should be noted that the MSD manual maintenance switch comprises a socket and a plug 1, the socket is fixed on the support frame of the battery pack, the plug 1 comprises a shell 10 which plays a protection role and a stress role, the top of the plug 1 is provided with a handle 15 for easy taking; in the normal use process, the plug 1 is plugged into the socket, the bottom of the shell 10 is provided with a base 11, the base 11 is symmetrically provided with four threaded holes one 12, the socket is provided with threaded holes two at the corresponding position, and the bolts pass through the threaded holes one 12 of the plug 1 and the threaded holes two of the socket in sequence to firmly fix the socket and the plug 1 together, so as to avoid the loosening of the plug 1 and threaten the safety in use.

[0022] The left self-locking part 6 comprises a left cover 601, two left limiting connecting rods 602 and a left shielding seat 603. The two left limiting connecting rods 602 are of the same length but different in the shape of the outer contour. The left cover 601 and the left shielding seat 603 are respectively distributed at the two ends of the left limiting connecting rod 602 along the length direction of the left limiting connecting rod 602, and the left cover 601 is located at the top end of the left limiting connecting rod 602, and the left shielding seat 603 is located at the bottom end of the left limiting connecting rod 602.

[0023] In one embodiment, the right self-locking part 7 comprises a right cover 701, two right limiting connecting rods 702 and a right shielding seat 703. The two right limiting connecting rods 702 are of the same length but different in the shape of the outer contour. The right cover 701 and the right shielding seat 703 are respectively distributed at the two ends of the right limiting connecting rod 702 along the length direction of the right limiting connecting rod 702, and the right cover 701 is located at the top end of the right limiting connecting rod 702, and the right shielding seat 703 is located at the bottom end of the corresponding right limiting connecting rod 702.

[0024] The right cover 701 is located between the left cover 601 and the left shielding seat 603, and the left cover 601 is located between the right cover 701 and the right shielding seat 703. The left shielding seat 603 and the right shielding seat 703 are both provided with a shielding groove 13 and a baffle 14. Along the length direction of the shell 10, the baffle 14 is located between the two shielding grooves 13 on the same side, and is used to intercept the top of the bolt to cooperate with the safety lock 8 to lock the position of the self-locking part when the left self-locking part 6 and the right self-locking part 7 are closed.

[0025] When the top of the left self-locking part 6 and the right self-locking part 7 is close to each other, the bottom of the left self-locking part 6 and the right self-locking part 7 is far away from each other.

[0026] The self-locking groove 2 comprises a self-locking groove one 2a in the left cover 601 and a self-locking groove two 2b in the right cover 701. The top of the self-locking groove one 2a and the self-locking groove two 2b is matched with the protruding teeth 3. The outer contour of the left limiting connecting rod 602 and the right limiting connecting rod 702 on the same side is matched with each other, and the outer contour of the left limiting connecting rod 602 and the right limiting connecting rod 702 is also matched with the protruding teeth 3 of the corresponding height, so as to limit the sliding connection between the protruding teeth 3, the left self-locking part 6 and the right self-locking part 7.

[0027] In particular, the top end of the left cover 601 and the right cover 701 is provided with a safety ring 9 for the safety lock 8 to pass through.

[0028] In this way, the safety lock 8 can be used to lock the left self-locking part 6 and the right self-locking part 7, and the safety lock 8 can be used to lock the left self-locking part 6 and the right self-locking part 7. Figure 2 and Figure 4, in order to further improve the firmness and safety of the plug 1 and the socket connection, a plurality of rows of protrusions 3 are symmetrically arranged on both sides of the shell 10, a spacing is left between two adjacent protrusions 3 to form a limiting groove 4, the protrusions 3 are arranged along the length direction of the shell 10, and the width of the protrusions 3 gradually increases from bottom to top along the height direction of the shell 10; The self-locking grooves 2 are downwardly open "D" shaped, and the self-locking grooves 2 of the left self-locking piece 6 and the right self-locking piece 7 are inserted on the shell 10; At the same time, the left self-locking piece 6 and the right self-locking piece 7 are first connected in the length direction, and the left self-locking piece 6 and the right self-locking piece 7 are opened and closed by mutual restriction.

[0029] In use: First, after the plug 1 is inserted into the socket, the left self-locking piece 6 and the right self-locking piece 7 are installed: the left self-locking piece 6 and the right self-locking piece 7 are first connected in the length direction, the left cover 601 is located at the left end of the shell 10, and the right cover 701 is located at the right end of the shell 10 during insertion, and then the left self-locking piece 6 and the right self-locking piece 7 are inserted on the shell 10 along the limiting groove 4; Then, the positions of the left shielding seat 603 and the right shielding seat 703 are adjusted by pushing and pulling, so that the left shielding seat 603 and the right shielding seat 703 are located between two threaded holes one 12 on the same side, at this time the left shielding seat 603 and the right shielding seat 703 are close to each other, the left cover 601 and the right cover 701 are far away from each other, the threaded hole one 12 is exposed, and the threaded hole two is passed through by the bolt to fix the plug 1 and the socket by using the bolt; Then, the positions of the left shielding seat 603 and the right shielding seat 703 are adjusted by pushing and pulling, so that the left cover 601 and the right cover 701 are close to each other and fit together, at this time the left shielding seat 603 and the right shielding seat 703 are far away from each other, the limiting cavities of the left shielding seat 603 and the right shielding seat 703 cover the outer walls of the top of the corresponding side bolts, and the left shielding seat 603 and the right shielding seat 703 cannot continue to move away from each other after contacting the corresponding side bolts; therefore, at this time the left cover 601 and the right cover 701 are fitted, the left shielding seat 603 and the right shielding seat 703 cover the corresponding side bolts, at this time the bolt is located in the shielding groove 13, and the baffle 14 contacts the bolt; the left shielding seat 603 and the right shielding seat 703 each include a shielding groove 13 and a baffle 14; Finally, the safety lock 8 is passed through the two safety rings 9, and the left self-locking piece 6 and the right self-locking piece 7 are fixed together by the left top ring and the right top ring; the key of the safety lock 8 is kept by a specific person.

[0030] Second, when the left self-locking piece 6 and the right self-locking piece 7 are removed, a specific person who keeps the key is first applied, the specific person goes to the battery pack to check whether the circuit system is powered off, if the circuit system is powered off, the key is provided, and the maintenance personnel obtain the key to open the safety lock 8. By pushing and pulling the left and right shielding seats 603 and 703, the left and right shielding seats 603 and 703 are located between the two screw holes one 12 on the same side, at this time, the left and right shielding seats 603 and 703 are close to each other, the left cover 601 and the right cover 701 are far away from each other, the screw hole one 12 is exposed, and all the bolts are removed; the left and right self-locking parts 6 and 7 can be separated from the shell 10, or can not be separated; By holding the handle 15 on the top of the shell 10 or the outer wall of the shell 10, an external force is applied to pull out the plug 1, and the plug 1 is disconnected from the socket, and then the circuit is repaired to ensure the safety of personnel.

[0031] Figure 2 The protrusions 3 and the shell 10 are integrally formed without subsequent welding, the production convenience is improved, the left and right self-locking parts 6 and 7 are added to shield and expose the bolts, the screw hole one 12 and the bolt on the base 11 are covered by shielding, and the safety lock 8 is added to lock the positions of the left and right self-locking parts 6 and 7 in the closed state, the risk of the plug 1 being pulled out by mistake is reduced, and further protection is provided for the MSD manual maintenance switch.

[0032] In one embodiment, the shell 10 is symmetrically provided with side plates 16 on both sides, the side plates 16 are located at the center of the shell 10 along the length direction, and are used to limit the positions of the left and right self-locking parts 6 and 7 when the left and right self-locking parts 6 and 7 are opened.

[0033] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0034] It should be noted that if the invention embodiments involve directional indications (such as up and down), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), if the certain posture changes, the directional indications also change accordingly.

[0035] In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, if the invention embodiments involve "first", "second", etc. description, the "first", "second", etc. description is only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "multiple" refers to two or more.

[0036] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the invention.

Claims

1. A protective plug for an MSD manual maintenance switch, characterized in that, include: The plug (1) is used to connect to the socket and includes a housing (10) and a base (11). The base (11) is located at the bottom end of the housing (10). Threaded holes (12) are symmetrically distributed on the base (11) for bolts to pass through. The top of the bolt is located above the base (11). Several protruding teeth (3) are distributed on both sides of the shell (10) along the length direction of the shell (10); in each of the protruding teeth (3), the gap between two adjacent protruding teeth (3) is a limiting groove (4). The self-locking component includes a self-locking groove (2), the top of which surrounds the cross-section of the housing (10) in the width direction through the self-locking groove (2), and the self-locking component is located above the base (11); The self-locking component includes a left self-locking component (6) and a right self-locking component (7). The left self-locking component (6) and the right self-locking component (7) are slidably connected along their respective length directions. The left self-locking component (6) and the right self-locking component (7) are placed opposite each other and mutually restrict each other, so that the left self-locking component (6) and the right self-locking component (7) open and close along the limiting groove (4). The bottom of the corresponding self-locking component exposes or blocks the threaded hole 1 (12) and the bolt. Safety lock (8) is used to lock the position of the self-locking parts by engaging the top of the bolt when the left self-locking part (6) and the right self-locking part (7) are closed.

2. The MSD manual maintenance switch protection plug according to claim 1, characterized in that, The left self-locking component (6) includes a left cover (601), two left limiting links (602) and a left blocking seat (603). The two left limiting links (602) have the same length but different outer contour shapes. The left cover (601) and the left blocking seat (603) are respectively distributed at both ends of the left limiting link (602) along the length direction of the left limiting link (602). The left cover (601) is located at the top of the left limiting link (602), and the left blocking seat (603) is located at the bottom of the left limiting link (602).

3. The MSD manual maintenance switch protection plug according to claim 2, characterized in that, The right self-locking component (7) includes a right cover (701), two right limiting links (702) and a right blocking seat (703). The two right limiting links (702) have the same length but different outer contour shapes. The right cover (701) and the right blocking seat (703) are respectively distributed at both ends of the right limiting link (702) along the length direction of the right limiting link (702). The right cover (701) is located at the top of the right limiting link (702), and the right blocking seat (703) is located at the bottom of the corresponding right limiting link (702).

4. The MSD manual maintenance switch protection plug according to claim 3, characterized in that, The right cover (701) is located between the left cover (601) and the left shielding seat (603), and the left cover (601) is located between the right cover (701) and the right shielding seat (703). Both the left shielding seat (603) and the right shielding seat (703) are provided with shielding grooves (13) and baffles (14). Along the length of the housing (10), the baffles (14) are located between the two shielding grooves (13) on the same side, and are used to intercept the top of the bolt when the left self-locking member (6) and the right self-locking member (7) are closed, so as to cooperate with the safety lock (8) to lock the position of the self-locking member.

5. The MSD manual maintenance switch protection plug according to claim 4, characterized in that, When the tops of the left self-locking member (6) and the right self-locking member (7) are close together, the bottoms of the left self-locking member (6) and the right self-locking member (7) are far apart.

6. The MSD manual maintenance switch protection plug according to claim 4, characterized in that, In each of the protruding teeth (3), the width of the protruding teeth (3) gradually increases from bottom to top.

7. The MSD manual maintenance switch protection plug according to claim 4, characterized in that, The housing (10) has symmetrical side plates (16) on both sides. The side plates (16) are located at the center of the housing (10) along its length direction and are used to restrict the position of the left self-locking member (6) and the right self-locking member (7) when the left self-locking member (6) and the right self-locking member (7) are opened.

8. The MSD manual maintenance switch protection plug according to claim 7, characterized in that, The key to the security lock (8) is kept by a designated person.

9. The MSD manual maintenance switch protection plug according to claim 3, characterized in that, The self-locking groove (2) includes a self-locking groove one (2a) in the left cover (601) and a self-locking groove two (2b) in the right cover (701). The tops of the self-locking groove one (2a) and the self-locking groove two (2b) are engaged with the protruding tooth (3). The outer contours of the left limiting link (602) and the right limiting link (702) on the same side are engaged with each other, and the outer contours of the left limiting link (602) and the right limiting link (702) are also engaged with the protruding tooth (3) of the corresponding height, so as to restrict the sliding connection between the protruding tooth (3), the left self-locking member (6) and the right self-locking member (7).

10. The MSD manual maintenance switch protection plug according to claim 3, characterized in that, The top of both the left cover (601) and the right cover (701) are provided with a safety ring (9) for the safety lock (8) to pass through.

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