Mechanical interlocking device of circuit breaker and circuit breaker device

Abstract

A mechanical interlocking device for a circuit breaker and a circuit breaker device. The mechanical interlocking device is fixedly installed between the side surfaces of two groups of circuit breakers of the circuit breaker device and is used to realize the mechanical interlocking of the two groups of circuit breakers. The mechanical interlocking device comprises a shell and a sliding cover movably arranged on the shell. The sliding cover is provided with a rotatable knob. The knob drives the sliding cover to move to block the circuit breaker handle of any one group of circuit breakers from moving to a closing position and avoid the circuit breaker handle of the other group of circuit breakers. At this time, the knob can be rotated to a locking limit position with the shell to block the sliding cover from moving.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a mechanical interlocking device of a circuit breaker and a circuit breaker device. Background Art

[0002] In low-voltage power distribution systems, many important power supply occasions use two power supplies, one for the main power supply and the other for the backup power supply. When the power distribution system is running, only one of the two power supplies can be used. If both power supplies are supplied at the same time, it will cause abnormal voltages in the power equipment and the power grid, seriously affecting the operation of the equipment and the safety of the power grid, and causing power accidents. Therefore, mechanical interlocking or electrical interlocking must be used to ensure that only one of the two power supplies is input.

[0003] The existing mechanical interlocking device is usually vertically pressed on the circuit breaker of one of the power sources to prevent the operating handle from closing the switch, but this pressing force is unreliable and will fail if it is slightly loose.

[0004] In addition, the existing mechanical interlocking device for circuit breakers is usually installed on the TH35-7.5 mounting rail or on the side of the circuit breaker, and users face problems of inconvenient and unstable installation during the installation process.

[0005] In addition, existing mechanical interlocking devices are usually made of sheet metal. When operating the operating handle of the circuit breaker to close or open the circuit, the hands are easily scratched by burrs on the broken surface of the sheet metal. Moreover, metal parts are easy to conduct electricity, posing electrical hazards. Summary of the invention

[0006] The purpose of the invention is to overcome the defects of the prior art and provide a mechanical interlocking device for circuit breakers for realizing mechanical interlocking of two groups of miniature circuit breakers.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A mechanical interlocking device for a circuit breaker is used to achieve mechanical interlocking of two groups of circuit breakers, comprising a housing and a sliding cover movably arranged on the housing, wherein the sliding cover is provided with a rotatable knob, and the knob drives the sliding cover to move to block the circuit breaker handles of any one group of circuit breakers from moving to a closing position and avoid the circuit breaker handles of the other group of circuit breakers. At this time, the knob can be rotated to a locking limit position with the housing to block the movement of the sliding cover.

[0009] Preferably, knob slots and / or knob buckles are respectively provided on the housing at two positions corresponding to the sliding covers blocking the circuit breaker handles of the two groups of circuit breakers, and the knobs are correspondingly provided with limit buckles and / or limit slots.

[0010] Preferably, the housing is provided with two guide rails which are parallel to each other and staggered at both ends, and one end of the two guide rails is respectively spaced apart and located on the side of the other guide rail to form a blocking opening; the knob is provided with two locking mechanisms which correspond to the guide rails respectively, and when the sliding cover drives the knob to move to the blocking opening at one end, the circuit breaker handles of one group of circuit breakers are blocked, and rotating the knob can drive the corresponding locking mechanism to rotate into the blocking opening and limit the position with the guide rail.

[0011] Preferably, the two locking mechanisms respectively include a blocking member and a locking member, and the blocking member can be rotated into the blocking opening and limited by one guide rail under the drive of the knob, and the knob can drive the locking member to rotate to be limited by the other guide rail, so that the locking mechanism is limited between the two guide rails.

[0012] Preferably, the other ends of the two guide rails away from their respective blocking openings protrude toward the other guide rail to form locking bosses, and one ends of the two guide rails forming the blocking openings are inclined toward the other guide rail to form blocking surfaces opposite to the locking bosses, and the blocking member and the locking member are limited between the blocking surface and the locking bosses.

[0013] Preferably, the knob includes a turntable and a handle arranged on one side of the turntable, two sets of locking mechanisms are symmetrically arranged on the other side of the turntable, the locking members of the two sets of locking mechanisms are arranged in the middle of the turntable, and the blocking members of the two sets of locking mechanisms are respectively arranged at the edge of the turntable with their respective locking members spaced apart, when the knob is rotated to the outer shell locking limit position, the outer side surface of the blocking member is limited by one end of a guide rail, and the side of the locking member facing the locking member is limited by one end of the other guide rail, and when the knob moves with the sliding cover, the two locking mechanism blocking members and the locking members respectively slide and cooperate with the two sides of the corresponding guide rails.

[0014] Preferably, the housing, the sliding cover and the knob are injection molded separately.

[0015] Preferably, the housing includes a side plate fixedly connected to one side of the circuit breaker housing, and a top plate vertically connected to one end of the top of the side plate, the top plate is arranged on one side of the circuit breaker handle, the side plate is snap-connected to the circuit breaker housing, and a guide mechanism cooperating with the sliding cover is provided on the top plate, the sliding cover includes a sliding part cooperating with the guide mechanism, and a blocking part arranged on the side of the sliding part, the knob is arranged on the sliding part, and the sliding part can drive the blocking part to move to the position of the circuit breaker handle to block the circuit breaker handle from closing.

[0016] Preferably, the guide mechanism comprises two slide plates arranged opposite to each other, and slide grooves are respectively provided on one side of the two slide plates close to each other, and the sliding part is provided with two limiting buckles which are respectively limited and slidably matched in the slide grooves.

[0017] Preferably, the knob includes a turntable and a handle and a locking mechanism respectively arranged on both sides of the turntable, the turntable includes a turntable connected to the handle, and a step arranged on the outside of the turntable, the sliding cover is provided with a step groove matching the step, and a turntable hole matching the turntable is provided in the step groove, the two handle holes are relatively arranged on both sides of the turntable hole and connected to the turntable hole, the inner diameter of the turntable hole is larger than the outer diameter of the turntable and smaller than the outer diameter of the step; the handle passes through the sliding cover from the handle hole, so that the turntable is inserted into the turntable hole and rotated, and at the same time the step is limited by the step groove on the other side of the sliding cover relative to the handle.

[0018] Preferably, the sliding cover is provided with a positioning boss that cooperates with the side limit of the handle, and the positioning boss blocks the knob in a position where it is unlocked from the shell; and / or, the sliding cover is provided with a positioning convex point that cooperates with the handle, and the handle is provided with a positioning groove that cooperates with the positioning convex point, and the positioning groove is sleeved on the positioning convex point when the knob is rotated to the locking limit of the shell.

[0019] Preferably, two oppositely arranged clamping plates are provided at the bottom of the side plate, and mounting buckles are respectively provided on the inner sides of the two clamping plates, and the two ends of the circuit breaker housing in the length direction are limited between the two clamping plates, and buckle grooves cooperating with the mounting buckles are respectively provided at the two ends of the circuit breaker housing in the length direction.

[0020] Preferably, the circuit breaker housing is in a "convex" shaped structure, an upper cavity for accommodating a circuit breaker handle is provided in the middle of the circuit breaker housing, side cavities for accommodating wiring terminals are provided at both ends of the circuit breaker housing corresponding to the lower side of the upper cavity, housing grooves are formed between the upper cavity and the top surfaces of the side cavities at both ends, and a supporting boss is provided at the bottom of the side plate which is inserted into the housing groove and limitedly cooperates with the circuit breaker housing.

[0021] Preferably, the locking members of the two groups of locking mechanisms are respectively provided with locking sliding surfaces on one side along the circumference of the turntable, and are respectively provided with locking inclined surfaces on the other side along the circumference of the turntable, the locking sliding surfaces of the two locking members are parallel to each other and are respectively arranged perpendicular to the rotating handle; the angle between the locking sliding surface and the locking inclined surface of the locking member is an acute angle or is 5-15 degrees; the blocking members of the two groups of locking mechanisms are respectively provided with blocking sliding surfaces on one side close to their respective locking members, and are respectively provided with blocking limiting surfaces on the side away from their respective locking members, the blocking sliding surfaces of the two blocking members are parallel to each other and are respectively arranged perpendicular to the rotating handle; the guide rail is provided with a blocking surface cooperating with the blocking limiting surface, and the blocking surface and the blocking limiting surface are both arc structures.

[0022] The mechanical interlocking device of the circuit breaker created by the present invention comprises a housing and a sliding cover movably arranged on the housing for blocking the closing of the circuit breaker handle. The sliding cover is provided with a rotatable knob, and the knob can drive the sliding cover to move to block the closing of the circuit breaker handle of one group of circuit breakers. The knob can be rotated to a locking limit position with the housing to block the movement of the sliding cover, and at this time, the other group of circuit breakers can be normally opened and closed. When the other group of circuit breakers is in the opening position, the knob can drive the sliding cover to move to block the closing of the circuit breaker handle of the other group of circuit breakers. At this time, the knob can also be rotated to a locking limit position with the housing to block the movement of the sliding cover. When the knob is locked to a limit position with the housing, the knob can block the movement of the sliding cover from the moving direction of the sliding cover to prevent the sliding cover from being removed and losing the function of blocking the circuit breaker handle. In addition, the present invention cooperates with two locking mechanisms respectively through two staggered guide rails, and there is no need to set blocking openings separately. Blocking openings can be directly formed at both ends of the guide rails, and the knob can be rotated into the blocking opening to limit the position when the sliding cover is moved to the circuit breaker on either side. The guide rail also plays a role of guiding and limiting, and has the characteristics of simple structure and easy processing.

[0023] The invention also provides a circuit breaker device, including the mechanical interlocking device of the circuit breaker and two groups of circuit breakers, wherein the mechanical interlocking device is fixedly installed between the sides of the two groups of circuit breakers, and the sliding cover of the mechanical interlocking device is arranged at one end of the two groups of circuit breakers provided with the circuit breaker handle. The two groups of circuit breakers can be used to access the normal power supply and the backup power supply respectively, and when one group of circuit breakers is closed, the mechanical interlocking device limits the circuit breaker handle of the other group of circuit breakers, so that the two groups of circuit breakers cannot be closed at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the position when the sliding cover of the embodiment of the present invention locks the right circuit breaker;

[0025] Figure 2 It is the position when the sliding cover of the embodiment of the present invention locks the left circuit breaker;

[0026] Figure 3 It is a schematic diagram of the assembly of the housing and the circuit breaker housing of the embodiment of the invention;

[0027] Figure 4 It is a schematic diagram of the assembly of the housing, the knob and the sliding cover of the embodiment of the invention;

[0028] Figure 5 It is a schematic diagram of the cooperation between the guide rail and the knob when the embodiment of the invention is limited;

[0029] Figure 6 It is a schematic diagram of the structure of the housing of an embodiment of the invention;

[0030] Figure 7 It is a structural schematic diagram of a knob according to an embodiment of the present invention;

[0031] Figure 8 It is a structural schematic diagram of one side of the locking mechanism of an embodiment of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the other side of the locking mechanism of the embodiment of the present invention;

[0033] Fig.10 It is a structural schematic diagram of one side of the sliding cover of an embodiment of the present invention;

[0034] Fig.11 It is a schematic diagram of the structure of the other side of the sliding cover of the embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following is combined with Figures 1 to 11 The given examples further illustrate the specific implementation of the mechanical interlocking device for circuit breaker created by the present invention. The mechanical interlocking device for circuit breaker created by the present invention is not limited to the description of the following examples.

[0036] like Figure 1-5 As shown, the mechanical interlocking device of the circuit breaker is used to realize the mechanical interlocking of two groups of circuit breakers, including a housing 100 and a sliding cover 200 movably arranged on the housing 100, characterized in that: a rotatable knob 300 is provided on the sliding cover 200, and the knob 300 drives the sliding cover 200 to move to block the circuit breaker handle 500 of any one group of circuit breakers from moving to the closing position and avoid the circuit breaker handle 500 of the other group of circuit breakers. At this time, the knob 300 can be rotated to lock the housing 100 to a limit position to block the sliding cover 200 from moving.

[0037] The mechanical interlocking device of the circuit breaker created by the present invention is suitable for small circuit breakers and is used to realize the mechanical interlocking of two groups of circuit breakers, including a housing 100 and a sliding cover 200 movably arranged on the housing 100 for blocking the closing of the circuit breaker handle 500. The sliding cover 200 is provided with a rotatable knob 300, and the knob 300 can drive the sliding cover 200 to move to block the closing of the circuit breaker handle 500 of one group of circuit breakers. The knob 300 can be rotated to lock the limit position with the housing 100 to block the movement of the sliding cover 200, and at this time, the other group of circuit breakers can be normally opened and closed. When the other group of circuit breakers is in the opening position, the knob 300 can drive the sliding cover 200 to move to block the closing of the circuit breaker handle 500 of the other group of circuit breakers. At this time, the knob 300 can also be rotated to lock the limit position with the housing 100 to block the movement of the sliding cover 200. When the knob 300 is locked with the housing 100 , the knob 300 can block the sliding cover 200 from moving in the moving direction of the sliding cover 200 , thereby preventing the sliding cover 200 from moving away and losing the function of blocking the circuit breaker handle 500 .

[0038] like Figure 1-2As shown, a circuit breaker device includes two groups of circuit breakers. The mechanical interlocking device of the present invention is installed between the two groups of circuit breakers. The housing 100 is fixed between the sides of the two groups of circuit breakers. The slide cover 200 and the knob 300 are arranged at one end of the two groups of circuit breakers where the circuit breaker handle 500 is provided. The slide cover 200 can move left and right in the direction shown in the figure. Figure 1 The middle sliding cover 200 slides to the right to avoid the circuit breaker handle 500 of the left group of circuit breakers and limit the circuit breaker handle 500 of the right group of circuit breakers, so that the circuit breaker of the right group cannot be closed. Figure 2 In the embodiment, after the left group of circuit breakers is in the open position, the slide cover 200 can slide to the left to avoid the circuit breaker handle 500 of the right group of circuit breakers, limit the circuit breaker handle 500 of the left group of circuit breakers, and prevent the left group of circuit breakers from closing. The knob 300 is used to lock and unlock the slide cover 200. When the slide cover 200 moves to the far left or far right, the knob 300 can be rotated to the locked position and the unlocked position for locking and unlocking the slide cover 200. The knob 300 is rotated to the locked position and the unlocked position for locking and unlocking the slide cover 200. Figure 1 , 2 When the locking position is reached, the limit slide cover 200 prevents it from sliding to the corresponding set of circuit breakers that have been locked, and the knob 300 is turned to Figure 3 When the slide cover 200 is in the unlocked position, the slide cover 200 can slide left and right. The two groups of circuit breakers in this embodiment each include two-pole circuit breaker units. Of course, each group of circuit breakers can also include only one-pole or three-pole or more circuit breaker units, all of which belong to the protection scope of the invention. The two groups of circuit breakers can be used to access the normal power supply and the backup power supply respectively. When one group of circuit breakers is closed, the mechanical interlocking device limits the circuit breaker handle 500 of the other group of circuit breakers, so that the two groups of circuit breakers cannot be closed at the same time.

[0039] See also Figure 4 The housing 100 includes a side plate 110 and a top plate 120 vertically connected to one end of the top of the side plate 110. The side plate 110 is used to cooperate and be fixedly connected with one side of the circuit breaker housing 600, and the top plate 120 is used to install the slide cover 200 and the knob 300. Specifically, the housing 100 includes a side plate 110 arranged parallel to the length direction of the circuit breaker housing 600, and a top plate 120 arranged parallel to the thickness direction of the circuit breaker housing 600. The top plate 120 is arranged on one side of the circuit breaker handle 500 and connected to the top of the side plate 110, and the two ends of the bottom of the side plate 110 are respectively connected to the circuit breaker housing 600.

[0040] like Figure 3-4As shown, the housing 100 is snap-connected with the circuit breaker housing 600. The circuit breaker housing 600 is in a "convex" shape, and an upper cavity 610 for accommodating the circuit breaker handle 500 is provided in the middle of the circuit breaker housing 600. The circuit breaker housing 600 is provided with side cavities 620 for accommodating the wiring terminals at both ends corresponding to the lower side of the upper cavity 610, and housing grooves 630 are formed between the upper cavity 610 and the top surfaces of the side cavities 620 at both ends. Two oppositely arranged clamping plates 111 are provided on both sides of the bottom of the side plate 110, and mounting buckles 112 are provided on the inner sides of the two clamping plates 111. The two ends of the circuit breaker housing 600 along the length direction are limited between the two clamping plates 111, and the two ends of the circuit breaker housing 600 along the length direction are provided with buckle grooves 113 that cooperate with the mounting buckles 112. The side plate 110 and the mounting buckles 112 at both ends form a "U"-shaped structure and are mounted on the circuit breaker housing 600 from the side, so that the two mounting buckles 112 are mounted on the side cavities 620 at both ends of the circuit breaker, and are respectively inserted into the corresponding mounting slots to fix the housing 100, which has the characteristics of simple structure and convenient assembly. However, due to the limited thickness of the circuit breaker housing 600 and the thin buckle slot 113, when the user forcibly performs an illegal closing operation, it is easy to cause damage to the housing 100 and the mounting buckle 112.

[0041] In particular, one of the improvements of the present invention is that the bottom of the side plate 110 is provided with a support boss 114 inserted into the housing groove 630 and limitedly matched with the circuit breaker housing 600. After the support bosses 114 on both sides are respectively inserted into the housing groove 630, they are respectively limitedly matched with the circuit breaker housing 600. The support bosses 114 can share the force on the housing 100 to prevent the housing 100 and the mounting buckle 112 from being damaged due to excessive force. It should be noted that the housing 100 can also be provided with no side plate 110, and the top plate 120 is directly fixed to the circuit breaker housing 600, but this requires the circuit breaker housing 600 to be modified. By providing the side plate 110, the force is more reliable, the buckle 112 is matched with the buckle groove 113 on the circuit breaker housing 600 for installing accessories, and the support boss 114 is limited with the existing housing groove 630 on the circuit breaker housing 600, and the circuit breaker housing 600 does not need to be modified, and it does not need tools to be installed.

[0042] See also Figure 5-6, the top plate 120 is provided with a guide mechanism that cooperates with the slide cover 200, and a locking structure that cooperates with the knob 300. In this embodiment, the guide mechanism includes two slide plates 121 arranged opposite to each other, and the two slide plates 121 are respectively provided with a slide groove 122 on one side close to each other; the locking structure includes two guide rails 400. As an embodiment of the locking structure, the top plate 120 of the housing 100 is respectively provided with a knob slot and / or a knob buckle at two locking positions of the circuit breaker handle 500 corresponding to the slide cover 200 blocking the two groups of circuit breakers, and the knob 300 is correspondingly provided with a limit buckle and / or a limit groove. After the knob 300 moves to the locking position with the slide cover 200, it rotates to one side, and the limit buckle and / or the limit groove cooperate with the knob slot and / or the knob buckle to achieve locking; the reverse rotation releases the lock.

[0043] See also Figure 4 The sliding cover 200 includes a sliding portion 210 that cooperates with the guide mechanism, and a blocking portion 220 disposed on the side of the sliding portion 210 for limiting the position of the circuit breaker handle 500. The knob 300 is disposed on the sliding portion 210 and cooperates with the guide rail 400. The sliding portion 210 is provided with two slots 211. The slot walls of the two slots 211 extend between the two slide plates 121 to form a limit buckle 212 ( Fig.11 ), the two limiting buckles 212 are respectively limited in the sliding groove 122 for sliding cooperation, and the sliding part 210 can drive the blocking part 220 to move to the position of the circuit breaker handle 500 to block the circuit breaker handle 500 from closing. The guide mechanism of this embodiment can not only play a limiting role to prevent the sliding cover 200 from falling off from the housing 100, but also provide a guiding role for the movement of the sliding cover 200. Obviously, other structures of the guiding mechanism can also be used, such as not providing the slot 211, or providing a guiding rib on the top plate 120, providing a guiding groove on the sliding cover 200, and assembling the sliding cover 200 in parallel to the sliding direction, etc., all of which belong to the protection scope of the present invention.

[0044] like Figure 4-6As shown, one of the improvements of the present invention is that the locking structure adopts a structure in which the knob 300 cooperates with the guide rail 400, and the knob 300 is limited by the guide rail 400. The top plate 120 of the housing 100 includes two guide rails 400 that are parallel to each other and staggered at both ends. One end of the two guide rails 400 is respectively spaced and located at the side of the other guide rail 400 to form a blocking opening 410; the knob 300 is provided with two locking mechanisms 310 corresponding to the guide rails 400 respectively. When the sliding cover 200 moves to the circuit breaker on one side, the knob 300 is driven to move to the blocking opening 410 at one end to block the circuit breaker handle 500 of one group of circuit breakers. Rotating the knob 300 can drive the corresponding locking mechanism 310 to rotate into the blocking opening 410 and limit the position with the guide rail 400. By using two offset guide rails 400 to cooperate with the two locking mechanisms 310 respectively, there is no need to separately set up blocking openings 410, and blocking openings 410 can be directly formed at both ends of the guide rails 400. Moreover, when the sliding cover 200 moves to the circuit breaker on either side, the knob 300 can be rotated into the blocking opening 410 to limit the position. When the knob 300 does not move to the blocking opening 410 of the guide rail 400 with the sliding cover 200, it cannot be rotated at will. The guide rail 400 also plays the role of guiding and limiting, and has the characteristics of simple structure and easy processing.

[0045] Preferably, the housing 100, the sliding cover 200 and the knob 300 are respectively injection molded. Injection molding not only does not cause the problem of being scratched by burrs on the edges of sheet metal parts, but also the plastic has an insulating function, thereby eliminating electrical hazards.

[0046] For further information, see Figure 8-9 The two locking mechanisms 310 respectively include a blocking member 311 and a locking member 312. The blocking member 311 can be driven by the knob 300 to rotate to the blocking opening 410 and limit it with one guide rail 400. At the same time, the knob 300 can drive the locking member 312 to rotate to limit it with the other guide rail 400. The blocking member 311 is pressed against the corresponding guide rail 400 by the locking member 312, so that the locking mechanism 310 is limited between the two guide rails 400, which can prevent the knob 300 from losing its blocking effect on the sliding cover 200 after loosening.

[0047] Furthermore, the other ends of the two guide rails 400 are away from their respective blocking openings 410 and protrude toward the other guide rail 400 to form locking bosses 420. One ends of the two guide rails 400 forming the blocking openings 410 are inclined toward the other guide rail 400 to form blocking surfaces 411 opposite to the locking bosses 420. The blocking member 311 and the locking member 312 are limited between the blocking surface 411 and the locking bosses 420. The locking bosses 420 block the locking member 312 and can also be used to limit the rotation angle of the knob 300 to prevent the blocking member 311 from losing coordination with the guide rail 400 due to excessive rotation angle.

[0048] like Figure 7-9 As shown, the knob 300 includes a turntable 330 and a handle 320 arranged on one side of the turntable 330, two sets of locking mechanisms 310 are centrally symmetrically arranged on the other side of the turntable 330, the locking members 312 of the two sets of locking mechanisms 310 are arranged on the rotating shaft 334 in the middle of the turntable 330, and the blocking members 311 of the two sets of locking mechanisms 310 are respectively arranged at the edge of the turntable 330 with their respective locking members 312 spaced apart. When the knob 300 is rotated to the locking limit position of the housing 100, the blocking members 311 The outer side surface is limited by one end of a guide rail 400, and the side surface of the locking piece 312 facing the locking piece 312 is limited by one end of the other guide rail 400. When the knob 300 is misaligned with the guide rail 400, it can move with the sliding cover 200. The blocking pieces 311 and the locking pieces 312 of the two locking mechanisms 310 are respectively slidably matched with the two sides of the corresponding guide rails 400. The two guide rails 400 are respectively located between the blocking pieces 311 and the locking pieces 312 of the two locking mechanisms 310, playing a guiding and limiting role.

[0049] The locking members 312 of the two sets of locking mechanisms 310 are respectively provided with locking sliding surfaces 3121 on one side of the circumference of the rotating disk 330, and are respectively provided with locking inclined surfaces 3122 on the other side of the circumference of the rotating disk 330. The locking sliding surfaces 3121 of the two locking members 312 are parallel to each other and are respectively arranged perpendicular to the rotating handle 320, so that the locking members 312 of the two sets of locking mechanisms 310 can slide between the two guide rails 400. Moreover, the angles between the locking sliding surfaces 3121 of the two locking members 312 and their respective locking inclined surfaces 3122 are acute angles, preferably 5-15 degrees, so as to prevent the rotating handle 320 from falling into the rotating handle hole 321 and getting stuck and unable to rotate due to the assembly gap after the rotating handle 320 is parallel to the rotating handle hole 231.

[0050] The blocking members 311 of the two groups of locking mechanisms 310 are provided with blocking sliding surfaces 3111 on the sides close to the respective locking members 312, and blocking limiting surfaces 3112 on the sides away from the respective locking members 312. The blocking sliding surfaces 3111 of the two blocking members 311 are parallel to each other and are respectively arranged perpendicular to the rotating handle 320, so that the blocking members 311 of the two groups of locking mechanisms 310 can slide between the two guide rails 400. The blocking limiting surfaces 3112 of the two blocking members 311 are respectively in an arc structure, and the arc is the same as the arc of the side circumference of the rotating disk 330, that is, the blocking limiting surfaces 3112 of the two blocking members 311 are extended from the circumference of the side of the rotating disk 330, and the blocking surface 411 on the guide rail 400 is in an arc structure matching the arc of the blocking limiting surface 3112. The blocking sliding surfaces 3111 of the two blocking members 311 are parallel to each other and are respectively arranged perpendicular to the rotating handle 320.

[0051] like Figure 4 , 8As shown, the length of the handle 320 is greater than the diameter of the turntable 330 , and the slide cover 200 is provided with a handle hole 231 for avoiding the handle 320 . After the handle 320 passes through the handle hole 231 , it rotates a certain angle so that the handle 320 and the turntable 330 are respectively limited on both sides of the slide cover 200 .

[0052] See also Figure 7-9 The turntable 330 includes a turntable 331 connected to the handle 320, and a step 332 arranged on the outside of the turntable 331, and a step concave surface 333 is formed at the connection between the turntable 331 and the step 332.

[0053] The sliding cover 200 is provided with a step groove 232 ( Fig.11 ), a turntable hole 233 ( Fig.11 ), two handle holes 231 are arranged on both sides of the turntable hole 233 and are connected to the turntable hole 233, and the inner diameter of the turntable hole 233 is larger than the outer diameter of the turntable 331 and smaller than the outer diameter of the step 332;

[0054] The two ends of the handle 320 pass through the slide cover 200 from the handle hole 231, so that the turntable 331 is inserted into the turntable hole 233 and rotates, and the step 332 is limited by the step groove 232 at the other side of the slide cover 200 relative to the handle 320. Preferably, the slide cover 200 is in a semi-box-shaped structure and is buckled on the top plate 120. A plurality of reinforcing ribs 213 are provided on the inner side of the slide cover 200, and the reinforcing ribs 213 can improve the structural strength of the slide cover 200 and prevent the slide cover 200 from being damaged.

[0055] See also Figure 10-11 The side of the sliding cover 200 close to the rotating handle 320 is provided with two sets of positioning mechanisms which are centrally symmetrically arranged on both sides of the turntable hole 233. The two sets of positioning mechanisms are respectively matched with the two ends of the rotating handle 320. The two sets of positioning mechanisms respectively include a positioning boss 214 and a positioning convex point 215. Positioning grooves 321 which cooperate with the positioning convex point 215 are respectively provided at both ends of the rotating handle 320. Relevant information, such as brand trademarks, sliding instructions, lock and unlock marks, etc., can be molded or printed on the empty space on the front of the sliding cover 200.

[0056] The two positioning protrusions 215 are correspondingly arranged on the left and right sides of the turntable hole 233. When the handle 320 is rotated to make the locking mechanism 310 enter the blocking opening 410, the positioning grooves 321 at both ends of the handle 320 can be respectively "clicked" on the corresponding positioning protrusions 215 and rotated to the locking position. It can not only limit the knob 300 to prevent it from loosening to the unlocking position, but also can be used to prompt that it is rotated into place to prevent continued force from causing damage or misalignment failure.

[0057] The two positioning bosses 214 are correspondingly arranged on the upper and lower sides of the turntable hole 233. After the handle 320 is rotated to make the locking mechanism 310 leave the blocking opening 410, the side surfaces at both ends of the handle 320 are respectively blocked by the positioning bosses 214, which not only prevents the handle 320 from continuing to rotate, but also serves to prompt the rotation direction. The handle 320 can only rotate to the side away from the positioning boss 214.

[0058] like Figure 4 As shown, when assembling the mechanical interlocking device of the present invention, the handle 320 of the knob 300 passes through the handle hole 231 from the bottom of the slide cover 200 and then rotates counterclockwise at a certain angle until the handle 320 is blocked by the positioning boss 214. The knob 300 and the slide cover 200 are assembled together, and then the slide cover 200 is assembled onto the top plate 120. The two limit buckles 212 of the slide cover 200 are stuck in the two slide grooves 122 of the top plate 120. The slide cover 200 and the housing 100 are assembled together, and the knob 300 is limited between the slide cover 200 and the top plate 120. The entire assembly process of the mechanical interlocking device is tool-free installation. See Figure 3 The mechanical interlocking device is assembled to a side wall of a circuit breaker, the side plate 110 is snap-connected with the circuit breaker housing 600 , and the top plate 120 extends to one side of the circuit breaker handle 500 .

[0059] The above content is a further detailed description of the invention in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the invention is limited to these descriptions. For ordinary technicians in the technical field to which the invention belongs, several simple deductions or substitutions can be made without departing from the concept of the invention, which should be regarded as falling within the scope of protection of the invention.

Claims

1. A mechanical interlocking device for a circuit breaker, used for realizing mechanical interlocking of two groups of circuit breakers, comprising a housing (100) and a sliding cover (200) movably arranged on the housing (100), characterized in that: A rotatable knob (300) is provided on the sliding cover (200), and the knob (300) drives the sliding cover (200) to move to block the circuit breaker handle (500) of any one group of circuit breakers from moving to the closing position, and avoids the circuit breaker handle (500) of the other group of circuit breakers. At this time, the knob (300) can be rotated to a locked limit position with the housing (100), thereby blocking the sliding cover (200) from moving; The housing (100) is provided with knob slots and / or knob buckles at two positions corresponding to the sliding cover (200) blocking the circuit breaker handles (500) of the two groups of circuit breakers, and the knob (300) is provided with a limit buckle and / or a limit slot.

2. The mechanical interlocking device of the circuit breaker according to claim 1, characterized in that: The housing (100) is provided with two guide rails (400) which are parallel to each other and staggered at both ends. One end of the two guide rails (400) is spaced apart from the side of the other guide rail (400) to form a blocking opening (410). The knob (300) is provided with two locking mechanisms (310) which correspond to the guide rails (400) respectively. When the sliding cover (200) drives the knob (300) to move to the blocking opening (410) at one end, the circuit breaker handle (500) of one group of circuit breakers is blocked. When the knob (300) is rotated, the corresponding locking mechanism (310) can be driven to rotate into the blocking opening (410) and limit the position with the guide rail (400).

3. The mechanical interlocking device of the circuit breaker according to claim 2, characterized in that: The two locking mechanisms (310) respectively comprise a blocking member (311) and a locking member (312); the blocking member (311) can be driven by the knob (300) to rotate to a blocking opening (410) and to be limited by one guide rail (400); and the knob (300) can drive the locking member (312) to rotate to a position limited by the other guide rail (400), so that the locking mechanism (310) is limited between the two guide rails (400).

4. The mechanical interlocking device of the circuit breaker according to claim 3, characterized in that: The other ends of the two guide rails (400) away from their respective blocking openings (410) protrude toward the other guide rail (400) to form locking bosses (420); one end of the two guide rails (400) forming the blocking openings (410) is inclined toward the other guide rail (400) to form blocking surfaces (411) opposite to the locking bosses (420); the blocking member (311) and the locking member (312) are limited between the blocking surface (411) and the locking bosses (420).

5. The mechanical interlocking device of the circuit breaker according to claim 3, characterized in that: The knob (300) comprises a rotating disk (330) and a rotating handle (320) arranged on one side of the rotating disk (330); two sets of locking mechanisms (310) are arranged symmetrically on the other side of the rotating disk (330); the locking members (312) of the two sets of locking mechanisms (310) are arranged in the middle of the rotating disk (330); the blocking members (311) of the two sets of locking mechanisms (310) are arranged on the edge of the rotating disk (330) at intervals from their respective locking members (312); When the knob (300) is rotated to the locking limit position of the housing (100), the outer side surface of the blocking member (311) is limited to one end of one guide rail (400), and the side surface of the locking member (312) facing the locking member (312) is limited to one end of the other guide rail (400). When the knob (300) moves with the sliding cover (200), the blocking members (311) and the locking members (312) of the two locking mechanisms (310) are respectively slidably matched with the two sides of the corresponding guide rail (400).

6. The mechanical interlocking device of the circuit breaker according to claim 1, characterized in that: The housing (100), the sliding cover (200) and the knob (300) are respectively injection-molded.

7. The mechanical interlocking device of the circuit breaker according to claim 1, characterized in that: The housing (100) comprises a side plate (110) fixedly connected to one side of the circuit breaker housing (600), and a top plate (120) vertically connected to one end of the top of the side plate (110); the top plate (120) is arranged on one side of the circuit breaker handle (500); the side plate (110) is snap-connected to the circuit breaker housing (600); a guide mechanism matched with the sliding cover (200) is provided on the top plate (120); the sliding cover (200) comprises a sliding portion (210) matched with the guiding mechanism, and a blocking portion (220) arranged on the side of the sliding portion (210); the knob (300) is arranged on the sliding portion (210); the sliding portion (210) can drive the blocking portion (220) to move to the position of the circuit breaker handle (500) to block the circuit breaker handle (500) from closing.

8. The mechanical interlocking device of the circuit breaker according to claim 7, characterized in that: The guide mechanism comprises two slide plates (121) arranged opposite to each other, and a slide groove (122) is respectively provided on one side of the two slide plates (121) close to each other, and the sliding part (210) is provided with two limit buckles (212) respectively limited in the slide groove (122) for sliding cooperation.

9. The mechanical interlocking device of the circuit breaker according to claim 1, characterized in that: The knob (300) comprises a rotating disk (330) and a rotating handle (320) and a locking mechanism (310) respectively arranged on both sides of the rotating disk (330); the rotating disk (330) comprises a rotating table (331) connected to the rotating handle (320) and a step (332) arranged outside the rotating table (331); the sliding cover (200) is provided with a step groove (232) matched with the step (332); a rotating table hole (233) matched with the rotating table (331) is provided in the step groove (232); Two rotating handle holes (231) are arranged opposite to each other on both sides of the turntable hole (233) and are connected to the turntable hole (233); the inner diameter of the turntable hole (233) is larger than the outer diameter of the turntable (331) and smaller than the outer diameter of the step (332); the rotating handle (320) passes through the sliding cover (200) from the rotating handle hole (231), so that the turntable (331) is inserted into the turntable hole (233) and rotated, and at the same time, the step (332) is limited by the step groove (232) on the other side of the sliding cover (200) relative to the rotating handle (320).

10. The mechanical interlocking device of the circuit breaker according to claim 9, characterized in that: The sliding cover (200) is provided with a positioning boss (214) that cooperates with the side limit of the rotating handle (320), and the positioning boss (214) blocks the rotating knob (300) at a position where it is unlocked from the housing (100); and / or the sliding cover (200) is provided with a positioning convex point (215) that cooperates with the rotating handle (320), and the rotating handle (320) is provided with a positioning groove (321) that cooperates with the positioning convex point (215), and when the rotating knob (300) is rotated to the locking limit position of the housing (100), the positioning groove (321) is sleeved on the positioning convex point (215).

11. The mechanical interlocking device of the circuit breaker according to claim 7, characterized in that: The bottom of the side plate (110) is provided with two clamping plates (111) arranged opposite to each other, the inner sides of the two clamping plates (111) are respectively provided with mounting buckles (112), the two ends of the circuit breaker housing (600) along the length direction are limited between the two clamping plates (111), and the two ends of the circuit breaker housing (600) along the length direction are respectively provided with buckle grooves (113) matched with the mounting buckles (112).

12. The mechanical interlocking device of the circuit breaker according to claim 7, characterized in that: The circuit breaker housing (600) is in a "convex" shape; an upper cavity (610) for accommodating a circuit breaker handle (500) is provided in the middle of the circuit breaker housing (600); side cavities (620) for accommodating connection terminals are provided at two ends of the circuit breaker housing (600) corresponding to the lower side of the upper cavity (610); housing grooves (630) are formed between the upper cavity (610) and the top surfaces of the side cavities (620) at the two ends; and a supporting boss (114) is provided at the bottom of the side plate (110) and is inserted into the housing groove (630) and is limitedly matched with the circuit breaker housing (600).

13. The mechanical interlocking device of a circuit breaker according to claim 5, characterized in that: The locking members (312) of the two sets of locking mechanisms (310) are respectively provided with locking sliding surfaces (3121) on one side along the circumference of the rotating disk (330), and are respectively provided with locking inclined surfaces (3122) on the other side along the circumference of the rotating disk (330); the locking sliding surfaces (3121) of the two locking members (312) are parallel to each other and are respectively arranged perpendicular to the rotating handle (320); the angle between the locking sliding surface (3121) of the locking member (312) and the locking inclined surface (3122) is an acute angle or 5-15 degrees; the two sets of locking mechanisms The blocking members (311) of (310) are provided with a blocking sliding surface (3111) on one side close to the respective locking members (312), and a blocking limiting surface (3112) on the other side away from the respective locking members (312). The blocking sliding surfaces (3111) of the two blocking members (311) are parallel to each other and are respectively arranged perpendicular to the rotating handle (320); the guide rail (400) is provided with a blocking surface (411) matched with the blocking limiting surface (3112), and the blocking surface (411) and the blocking limiting surface (3112) are both in an arc structure.

14. A circuit breaker device, characterized in that: It comprises a mechanical interlocking device for circuit breakers as claimed in any one of claims 1 to 13 and two groups of circuit breakers, wherein the mechanical interlocking device is fixedly installed between the sides of the two groups of circuit breakers, and a sliding cover (200) of the mechanical interlocking device is arranged at one end of the two groups of circuit breakers where a circuit breaker handle (500) is provided.

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