Circuit breaker manual operating mechanism

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a manual operating mechanism for a circuit breaker, comprising a rotary handle, a housing, and a linkage plate, an interlocking rod, a traction rod, and a spring arranged within the housing; the rotary handle is rotatably arranged on the housing and is driveably connected to the linkage plate, and the rotary handle rotates synchronously with the linkage plate; the interlocking rod is pivotally arranged on the housing and is driveably engaged with the linkage plate; one end of the traction rod is rotatably connected to the interlocking rod and the other end is engaged with a limit position of the housing; and the spring is sleeved on the traction rod; the interlocking rod switches between a first position and a second position by reciprocating swinging, and the spring applies a first force and a second force to the interlocking rod, respectively, so that the interlocking rod remains in the first position and the second position, respectively; the manual operating mechanism for a circuit breaker of the present invention has a simple structure and reliable operation.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to a manual operating mechanism for a circuit breaker. Background Art

[0002] The domestic small three-box market has been on an upward trend. More and more fields, such as civil / commercial buildings, machinery, rail transportation, factory buildings, etc., require matching distribution boxes for power distribution protection.

[0003] With the improvement of users' safety awareness, manual operation of small distribution cabinets with side opening doors is appearing more and more frequently on the market, and has gradually become one of the major categories of small three-boxes; moreover, many distribution product projects have clear requirements for the box design, such as the box must be designed with a side opening door, and the molded case circuit breaker must be equipped with a special manual operation mechanism.

[0004] However, the existing manual operating mechanisms of circuit breakers often have the following deficiencies:

[0005] 1. The structure of the existing manual operating mechanism of the circuit breaker is complex, and the positioning of the interlocking rod is unstable and unreliable;

[0006] Second, the existing manual operation mechanism of the circuit breaker is only suitable for drawer cabinets and cannot be used in small three-box cabinets or other side-opening cabinets;

[0007] 3. The existing manual operating mechanism of the circuit breaker cannot be used when the cabinet door is open or closed at the same time. Summary of the Invention

[0008] The object of the present invention is to overcome the defects of the prior art and provide a manual operating mechanism for a circuit breaker which has a simple structure and reliable operation.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A circuit breaker manual operating mechanism includes a rotary handle 13, a housing 4, and a linkage plate 5, an interlocking rod 3, a traction rod 8, and a spring 9 arranged within the housing 4; the rotary handle 13 is rotatably mounted on the housing 4 and is drivingly connected to the linkage plate 5, and the rotary handle 13 rotates synchronously with the linkage plate 5; the interlocking rod 3 is pivotally mounted on the housing 4 and is drivingly engaged with the linkage plate 5; one end of the traction rod 8 is rotatably connected to the interlocking rod 3 and the other end is limitedly engaged with the housing 4; the spring 9 is sleeved on the traction rod 8; the interlocking rod 3 switches between a first position and a second position by reciprocating swinging, and the spring 9 applies a first force and a second force to the interlocking rod 3, respectively, so that the interlocking rod 3 remains in the first position and the second position, respectively.

[0011] Preferably, when the interlocking rod 3 is in the first position, the rotation center of the interlocking rod 3 is located on one side of the axis of the traction rod 8; when the interlocking rod 3 is in the second position, the rotation center of the interlocking rod 3 is located on the other side of the axis of the traction rod 8.

[0012] Preferably, the interlocking rod 3 is in the first position, and the interlocking rod 3 is locked with the linkage plate 5 to prevent the rotating handle 13 from rotating in the first direction; when the interlocking rod 3 is in the second position, the rotating handle 13 rotates in the first direction, and after the interlocking rod 3 is driven by the linkage plate 5 to rotate past the critical position, the interlocking rod 3 rotates to the first position.

[0013] Preferably, the circuit breaker manual operating mechanism further comprises a driving member, which is mounted on a cabinet door 14 of a circuit breaker assembly cabinet for mounting the circuit breaker and moves synchronously with the cabinet door 14;

[0014] When the interlocking rod 3 is in the second position, the circuit breaker is in the open state and the cabinet door 14 is in the closed state, the cabinet door 14 is opened, and the driving member drives the interlocking rod 3 to rotate past the critical position, and the interlocking rod 3 rotates to the first position and locks with the linkage plate 5. At this time, the cabinet door 14 is closed, and the driving member drives the interlocking rod 3 to rotate in the direction of the second position to the third position, so that the interlocking rod 3 and the linkage plate 5 are released from the locking cooperation and the driving member and the interlocking rod 3 are limited to prevent the cabinet door 14 from opening.

[0015] Preferably, the interlocking rod 3 includes an interlocking rod curved surface 3d provided at one end thereof, and the linkage plate 5 includes a linkage plate driving finger 5a, which drives and cooperates with the interlocking rod curved surface 3d to make the interlocking rod 3 swing back and forth.

[0016] Preferably, the interlocking rod curved surface 3 d is a C-shaped curved surface; the linkage plate driving finger 5 a is arranged at one radial end of the linkage plate 5 .

[0017] Preferably, the interlocking rod 3 includes an interlocking rod locking end 3c, and the linkage plate 5 includes a linkage plate locking platform 5b. The interlocking rod locking end 3c and the linkage plate locking platform 5b are locked and matched to prevent the rotary handle 13 from rotating in the first direction.

[0018] Preferably, the linkage plate 5 includes a small-diameter side wall 50b and a large-diameter side wall 51b sequentially arranged along its circumference, the outer diameter of the small-diameter side wall 50b is smaller than the outer diameter of the large-diameter side wall 51b, and the connection between the small-diameter side wall 50b and the large-diameter side wall 51b forms a linkage plate locking platform 5b;

[0019] When the interlocking rod 3 is located at the first position and locked with the linkage plate 5, the locking end 3c of the interlocking rod is opposite to the small-diameter side wall 50b and contacts the linkage plate locking platform 5b.

[0020] Preferably, one end of the interlocking rod 3 passes through the shell 4 and protrudes outside it. The shell 4 is provided with a shell opening 40 for the interlocking rod 3 to pass through and limit the swing stroke of the interlocking rod 3; the end of the interlocking rod 3 protruding outside the shell 4 cooperates with the driving member.

[0021] Preferably, the driving member includes a locking driving arm 15 and an unlocking driving arm 16 that are arranged opposite to each other, and the interlocking rod 3 is located between the locking driving arm 15 and the unlocking driving arm 16;

[0022] When the interlocking rod 3 is in the second position, the circuit breaker is in the open state and the cabinet door 14 is in the closed state, the cabinet door 14 is opened, and the locking driving arm 15 drives the interlocking rod 3 to rotate past the critical position, and the interlocking rod 3 rotates to the first position and locks with the linkage plate 5 to prevent the rotary handle 13 from rotating in the first direction. At this time, the cabinet door 14 is closed, and the unlocking driving arm 16 drives the interlocking rod 3 to rotate in the direction of the second position to the third position, so that the interlocking rod 3 and the linkage plate 5 are unlocked and the driving member is limited by the interlocking rod 3 to prevent the cabinet door 14 from opening.

[0023] Preferably, the locking drive arm 15 includes a first driving bevel 15a, and when the cabinet door 14 is opened, the moving direction of the first driving bevel 15a is perpendicular to the rotation direction of the interlocking rod 3; the unlocking drive arm 16 includes a second driving bevel 16a and an unlocking drive arm hook 16b, and when the cabinet door 14 is closed, the moving direction of the second driving bevel 16a is perpendicular to the rotation direction of the interlocking rod 3. After the cabinet door 14 is closed, the unlocking drive arm hook 16b is limitedly matched with the interlocking rod 3.

[0024] Preferably, the housing 4 also includes a traction rod limiting rib 478, one end of the traction rod 8 is rotationally connected to the interlocking rod 3, and the other end is limitedly engaged with the traction rod limiting rib 478; the spring 9 is sleeved on the traction rod 8, and the two ends are respectively limitedly engaged with the traction rod 8 and the traction rod limiting rib 478.

[0025] Preferably, the traction rod limiting rib 478 includes a traction rod limiting groove 48 , one end of the traction rod 8 is rotatably connected to the interlocking rod 3 , and the other end is inserted into the traction rod limiting groove 48 .

[0026] Preferably, the manual operating mechanism of the circuit breaker further includes a contact piece 7 provided on the traction rod limiting rib 478 , and the contact piece 7 limits the traction rod 8 in the traction rod limiting groove 48 .

[0027] Preferably, the traction rod 8 includes a traction rod connecting portion 8a, a traction rod main body 8c and a traction rod limiting portion 8b, the two ends of the traction rod main body 8c are respectively connected to the traction rod connecting portion 8a and the traction rod limiting portion 8b, the traction rod connecting portion 8a is rotationally connected to the interlocking rod 3, the traction rod limiting portion 8b is limitedly matched with the traction rod limiting rib 478 of the outer shell 4, and the outer diameter of the traction rod main body 8c is larger than the outer diameter of the traction rod limiting portion 8b.

[0028] Preferably, the interlocking rod 3 includes an interlocking rod first arm, an interlocking rod second arm and an interlocking rod third arm. The interlocking rod first arm, the interlocking rod second arm and the interlocking rod third arm are connected at one end and form a Y-shaped structure as a whole. An interlocking rod shaft hole 3g is provided in the middle of the Y-shaped structure, and an interlocking rod curved surface 3d is provided between the interlocking rod second arm and the interlocking rod third arm. The free end of the interlocking rod second arm is the interlocking rod locking end 3c, and the free end of the interlocking rod first arm passes through the outer shell 4 and protrudes outside the outer shell 4 to form an interlocking rod interlocking part 3a.

[0029] Preferably, the interlocking rod 3 further includes an interlocking rod connecting portion 3f rotatably connected to the traction rod 8 , and the interlocking rod connecting portion 3f is located between the first arm of the interlocking rod and the third arm of the interlocking rod and is arranged opposite to the second arm of the interlocking rod.

[0030] Preferably, the manual operating mechanism of the circuit breaker further includes a knob 10 rotatably arranged on the housing 4, the knob 10 is drive-connected to the interlocking rod 3, one end of the knob 10 is located on one side of the rotary handle 13, and is the knob operating end; by screwing the knob operating end, the interlocking rod 3 is driven to swing back and forth through the knob 10.

[0031] The manual operating mechanism of the circuit breaker of the present invention cooperates with the spring 9 and the traction rod 8 to keep the interlocking rod 3 in the first position and the second position respectively. The overall structure is simple and the operation is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the manual operating mechanism of the circuit breaker of the present invention, wherein the interlocking rod is located in the first position and locked with the linkage plate;

[0033] Figure 2A Schematic diagram of the structure of the manual operating mechanism of the circuit breaker of the present invention, in which the interlocking rod is in the second position and the locking cooperation with the linkage plate is released;

[0034] Figure 2B It is a structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the cooperation between the interlocking rod and the locking drive arm of the cabinet door;

[0035] Figure 3A Schematic diagram of the structure of the manual operating mechanism of the circuit breaker of the present invention, the interlocking rod is in the third position and is released from the locking engagement with the linkage plate;

[0036] Figure 3B It is a structural diagram of the manual operating mechanism of the circuit breaker of the present invention, which at least shows the cooperation relationship between the interlocking rod and the unlocking driving arm of the cabinet door;

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of the manual operating mechanism of the circuit breaker of the present invention;

[0038] Figure 5It is a schematic diagram of the coordinated structure of the interlocking rod, traction rod, spring and contact piece of the present invention;

[0039] Figure 6 It is a schematic structural diagram of the manual operating mechanism of the circuit breaker of the present invention, showing at least a rotary handle, an interlocking rod and a knob;

[0040] Figure 7 It is a structural schematic diagram of the interlocking rod of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the linkage plate of the present invention;

[0042] Figure 9 It is a structural schematic diagram of the traction rod of the present invention;

[0043] Figure 10 It is a structural schematic diagram of the housing of the present invention;

[0044] Figure 11 This invention Figure 10 A schematic diagram of the enlarged structure of part A;

[0045] Figure 12 It is a structural diagram of the manual operating mechanism of the circuit breaker of the present invention, showing at least the driving components. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-12 The following embodiments are provided to further illustrate the specific implementation of the manual operating mechanism of the circuit breaker of the present invention. The manual operating mechanism of the circuit breaker of the present invention is not limited to the description of the following embodiments.

[0047] The manual operating mechanism of a circuit breaker of the present invention includes a rotary handle 13, a housing 4, and a linkage plate 5, an interlocking rod 3, a traction rod 8, and a spring 9 arranged in the housing 4. The rotary handle 13 is rotatably arranged on the housing 4 and is driven by the linkage plate 5. The rotary handle 13 rotates synchronously with the linkage plate 5. The interlocking rod 3 is pivotally arranged on the housing 4 and is driven by the linkage plate 5. One end of the traction rod 8 is rotatably connected to the interlocking rod 3 and the other end is limited by the housing 4. The spring 9 is sleeved on the traction rod 8. The interlocking rod 3 switches between a first position and a second position by reciprocating swinging. The spring 9 applies a first force and a second force to the interlocking rod 3, respectively, so that the interlocking rod 3 remains in the first position and the second position, respectively.

[0048] The manual operating mechanism of the circuit breaker of the present invention cooperates with the spring 9 and the traction rod 8 to keep the interlocking rod 3 in the first position and the second position respectively. The overall structure is simple and the operation is reliable.

[0049] Preferably, Figure 1As shown, when the interlocking rod 3 is in the first position, the rotation center of the interlocking rod 3 is located on one side of the axis of the traction rod 8; as shown in Figure 2, when the interlocking rod 3 is in the second position, the rotation center of the interlocking rod 3 is located on the other side of the axis of the traction rod 8.

[0050] Preferably, Figure 1 As shown, the interlocking rod 3 is in the first position, and the interlocking rod 3 is locked with the linkage plate 5 to prevent the rotary handle 13 from rotating in the first direction; Figure 2A As shown, when the interlocking rod 3 is in the second position, the rotary handle 13 is rotated in the first direction, and after the interlocking rod 3 is driven by the linkage plate 5 to rotate past the critical position, the interlocking rod 3 rotates to the first position, entering Figure 1 Further, as Figure 1-3B As shown, the circuit breaker operating mechanism further includes a driving member, which is mounted on the cabinet door 14 of the circuit breaker assembly cabinet for mounting the circuit breaker and moves synchronously with the cabinet door 14; when the interlocking rod 3 is in the second position, the circuit breaker is in the open state, and the cabinet door 14 is in the closed state, the cabinet door 14 is opened, and the driving member drives the interlocking rod 3 to rotate past the critical position, and then the interlocking rod 3 rotates to the first position and locks with the linkage plate 5. At this time, the cabinet door 14 is closed, and the driving member drives the interlocking rod 3 to rotate in the direction of the second position to the third position, so that the interlocking rod 3 and the linkage plate 5 are unlocked and the driving member and the interlocking rod 3 are limited, preventing the cabinet door 14 from opening. It should be pointed out that the "critical position" refers to the position of the interlocking rod 3 when the rotation center of the interlocking rod 3 is located on the axis of the traction rod 8.

[0051] Preferably, a handle avoidance hole for avoiding the rotating handle 13 is provided in the middle of the cabinet door 14 .

[0052] Preferably, Figure 12 As shown, the manual operating mechanism of the circuit breaker of the present invention also includes a driving component 11 that cooperates with the handle of the circuit breaker. One end of the driving component 11 is pivotally set on the housing 4, and the other end is driven and cooperated with the linkage plate 5. The user can operate the rotating handle 13 to drive the driving component 11 to swing through the linkage plate 5, and the driving component 11 drives the circuit breaker to close / open through the handle of the circuit breaker.

[0053] The manual operating mechanism of the circuit breaker of the present invention also has the following technical effects:

[0054] 1. The rotary handle 13 is rotatably mounted on the housing 4 and does not move with the opening or closing of the cabinet door 14. The manual operating mechanism of the circuit breaker can be operated by rotating the handle 13 regardless of whether the cabinet door 14 is in the open or closed state.

[0055] 2. The coordination of the interlocking rod 3, linkage plate 5, traction rod 8, spring 9 and other structures makes the circuit breaker manual operating mechanism of the present invention applicable not only to drawer cabinets, but also to side-opening box bodies such as small three-box cabinets.

[0056] The manual operating mechanism of the circuit breaker of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0057] like Figure 1-12 FIG. 1 shows an embodiment of the manual operating mechanism of a circuit breaker according to the present invention.

[0058] like Figure 1-4 As shown in Figures 6 and 12, the manual operating mechanism of the circuit breaker of the present invention includes a rotary handle 13, a housing 4, and a linkage plate 5, an interlocking rod 3, a traction rod 8 and a spring 9 arranged in the housing 4; the rotary handle 13 is rotatably set on the housing 4 and is driven by the linkage plate 5, and the rotary handle 13 rotates synchronously with the linkage plate 5; the interlocking rod 3 is pivotally set on the housing 4 and is driven by the linkage plate 5, one end of the traction rod 8 is rotatably connected to the interlocking rod 3, and the other end is limited by the housing 4, and the spring 9 is sleeved on the traction rod 8; the interlocking rod 3 switches between the first position and the second position by reciprocating swing, and the spring 9 applies a first force and a second force to the interlocking rod 3 respectively, so that the interlocking rod 3 remains in the first position and the second position respectively.

[0059] Preferably, Figure 1 As shown, when the interlocking rod 3 is at one end of its swing stroke, the interlocking rod 3 is at the first position; Figure 2A As shown, when the interlocking rod 3 is located at the other end of its swing stroke, the interlocking rod 3 is located at the second position.

[0060] Preferably, Figure 1 As shown, when the interlocking rod 3 is in the first position, the rotation center of the interlocking rod 3 is located on one side of the axis of the traction rod 8; Figure 2A As shown, when the interlocking rod 3 is located at the second position, the rotation center of the interlocking rod 3 is located on the other side of the axis of the traction rod 8.

[0061] Preferably, the rotation axes of the interlocking rod 3, the linkage plate 5 and the rotating handle 13 are parallel to each other.

[0062] Specifically, such as Figure 1 As shown, the interlocking rod 3 is in the first position, the interlocking rod 3 is at the upper end of its swing stroke, and the rotation center of the interlocking rod 3 is located to the right of the axis of the traction rod 8; Figure 2AAs shown, the interlocking rod 3 is in the second position, the interlocking rod 3 is at the lower end of its swing stroke, and the rotation center of the interlocking rod 3 is located on the left side of the axis of the traction rod 8; the first force and the second force are both thrusts applied by the spring 9 to the interlocking rod 3 through the traction rod 8. The first force causes the interlocking rod 3 to have a tendency to rotate clockwise, and the second force causes the interlocking rod 3 to have a tendency to rotate counterclockwise, and the directions of the first force and the second force coincide with the axial direction of the traction rod 8 respectively.

[0063] Preferably, Figure 4 、 10 As shown in FIG11 , the housing 4 further includes a traction rod limiting rib 478. One end of the traction rod 8 is rotatably connected to the interlocking rod 3, and the other end is limitedly engaged with the traction rod limiting rib 478. The spring 9 is sleeved on the traction rod 8, and its two ends are respectively limitedly engaged with the traction rod 8 and the traction rod limiting rib 478. Figure 1-4 As shown in Figures 10-11, the traction rod limiting rib 478 includes a traction rod limiting groove 48. One end of the traction rod 8 is rotatably connected to the interlocking rod 3, and the other end is inserted into the traction rod limiting groove 48. Figure 1-4 As shown, the manual operating mechanism of the circuit breaker further includes a contact piece 7 provided on the traction rod limiting rib 478, and the contact piece 7 limits the traction rod 8 in the traction rod limiting groove 48. Figure 1-4 As shown in 10-11, the traction rod limiting rib 478 is further provided with a contact piece fixing hole 47, and the contact piece fixing screw 6 is threadedly connected to the contact piece fixing hole 47 to fix the contact piece 7 on the traction rod limiting rib 478.

[0064] Preferably, Figure 1-4 As shown, one end of the traction rod 8 is rotatably connected to the interlocking rod 3 through the first hinge shaft 1.

[0065] Specifically, such as Figure 1 -3, when the interlocking rod 3 switches between the first position and the second position by reciprocating swing, the end of the traction rod 8 connected to the interlocking rod 3 rotates relative to the interlocking rod 3, and at the same time, the other end of the traction rod 8 slides in the traction rod limiting groove 48; when the interlocking rod 3 switches from the first position to the second position (or from the second position to the first position), the spring 9 is first compressed to the critical point and then relaxes.

[0066] It should be noted that the contact piece 7 is optional. The drawbar retaining groove 48 can be replaced with a drawbar retaining hole. During installation, one end of the drawbar 8 is first inserted into the drawbar retaining hole, and then the other end of the drawbar 8 is rotatably connected to the interlocking rod 3. Of course, the drawbar retaining rib 478 can also be omitted, and an independent structure dedicated to retaining the drawbar 8 can be provided, which is then fixed to the housing 4. Obviously, all of the above structural possibilities fall within the scope of protection of the present invention.

[0067] Preferably, Figure 1 As shown, the interlocking rod 3 is in the first position, and the interlocking rod 3 is locked with the linkage plate 5 to prevent the rotary handle 13 from rotating in the first direction; Figure 2A As shown, when the interlocking rod 3 is in the second position, the rotary handle 13 is rotated in the first direction, and after the interlocking rod 3 is driven by the linkage plate 5 to rotate past the critical position, the interlocking rod 3 rotates to the first position, entering Figure 1 Further, as Figures 2A-3B As shown, the circuit breaker manual operating mechanism further includes a driving member, which is mounted on a cabinet door 14 of a circuit breaker assembly cabinet (not shown in the figure) for mounting the circuit breaker and moves synchronously with the cabinet door 14; Figure 2A and 2B As shown, when the interlocking rod 3 is in the second position, the circuit breaker is in the open state and the cabinet door 14 is in the closed state, the cabinet door 14 is opened, and the driving member drives the interlocking rod 3 to rotate past the critical position, the interlocking rod 3 rotates to the first position and locks with the linkage plate 5, entering Figure 1 In the state shown, the cabinet door 14 is closed at this time, and the driving member drives the interlocking rod 3 to rotate in the direction of the second position to the third position, so that the interlocking rod 3 and the linkage plate 5 are unlocked and the driving member and the interlocking rod 3 are limited to prevent the cabinet door 14 from being opened, and the cabinet door 14 is opened. Figure 3A and 3B Status shown.

[0068] Preferably, Figure 1-2A As shown in 3A-4 and 7, the interlocking rod 3 includes an interlocking rod curved surface 3d provided at one end thereof, and the linkage plate 5 includes a linkage plate driving finger 5a, which drives and cooperates with the interlocking rod curved surface 3d to make the interlocking rod 3 swing back and forth.

[0069] Preferably, Figure 1-2A , 3A-4 and 7, the interlocking rod curved surface 3d is a C-shaped curved surface. Figure 1-2A As shown in , 3A-4 and 7, the interlocking rod curved surface 3d includes four straight surfaces that are bent and connected in sequence.

[0070] Preferably, Figure 1-2A As shown in , 3A-4 and 8, the linkage plate driving finger 5a is arranged at one radial end of the linkage plate 5.

[0071] Preferably, Figure 1-2A , 3A-4 and 7-8, the interlocking rod 3 includes an interlocking rod locking end 3c, and the linkage plate 5 includes a linkage plate locking platform 5b; Figure 1 As shown, the locking end 3c of the interlocking rod is locked with the locking platform 5b of the linkage plate to prevent the rotary handle 13 from rotating in the first direction. Figure 7As shown, the linkage plate 5 includes a small diameter side wall 50b and a large diameter side wall 51b sequentially arranged along its axial direction, and the connection between the small diameter side wall 50b and the large diameter side wall 51b forms a linkage plate locking platform 5b; Figure 1 As shown, when the interlocking rod 3 is located at the first position and locked with the linkage plate 5, the locking end 3c of the interlocking rod is opposite to the small-diameter side wall 50c and contacts the linkage plate locking platform 5b.

[0072] Preferably, Figure 8 As shown, the small-diameter side wall 50b and the large-diameter side wall 51b are two arc-shaped side walls, and the radius of the small-diameter side wall 50b is smaller than the radius of the large-diameter side wall 51b.

[0073] Preferably, Figure 4 and 6 As shown, one end of the interlocking rod 3 passes through the housing 4 and protrudes outside the housing. The housing 4 is provided with a housing opening 4 for the interlocking rod 3 to pass through and to limit the swing stroke of the interlocking rod 3. The end of the interlocking rod 3 protruding outside the housing 4 cooperates with the driving member. Figure 4 and 6 As shown, the housing opening 4 is a long hole. It should be noted that after one end of the interlocking rod 3 passes through the housing 4, it protrudes outside the housing 4 to form an interlocking rod interlocking portion 3a that cooperates with the driving member.

[0074] Preferably, Figures 2A-3B As shown, the driving member includes a locking driving arm 15 and an unlocking driving arm 16 that are arranged opposite to each other, and the interlocking rod 3 is located between the locking driving arm 15 and the unlocking driving arm 16; Figure 2A and 2B As shown, when the interlocking rod 3 is in the second position, the circuit breaker is in the open state and the cabinet door 14 is in the closed state, the cabinet door 14 is opened, and the locking driving arm 15 drives the interlocking rod 3 to rotate past the critical position, the interlocking rod 3 rotates to the first position and locks with the linkage plate 5, preventing the rotary handle 13 from rotating in the first direction, entering Figure 1 In the state shown, the cabinet door 14 is closed at this time, and the unlocking driving arm 16 drives the interlocking rod 3 to rotate in the direction of the second position to the third position, so that the interlocking rod 3 and the linkage plate 5 are unlocked and the driving member and the interlocking rod 3 are limited to prevent the cabinet door 14 from being opened, and the cabinet door 14 is opened. Figure 3A and 3B Further, as Figure 2B and 3BAs shown, the locking drive arm 15 includes a first driving inclined surface 15a. When the cabinet door 14 is opened, the movement direction of the first driving inclined surface 15a is perpendicular to the rotation direction of the interlocking rod 3. The unlocking drive arm 16 includes a second driving inclined surface 16a and an unlocking drive arm hook 16b. When the cabinet door 14 is closed, the movement direction of the second driving inclined surface 16a is perpendicular to the rotation direction of the interlocking rod 3. After the cabinet door 14 is closed, the unlocking drive arm hook 16b is limitedly engaged with the interlocking rod 3. Further, as Figure 2B and 3B As shown, the locking drive arm 15 includes a locking drive protrusion arranged at one end thereof, and a side wall of the locking drive protrusion is a first driving inclined surface 15a. The unlocking drive arm hook 16b is arranged at one end of the unlocking drive arm 16, and a side wall of the unlocking drive arm hook 16b is a second driving inclined surface 16a. The first driving inclined surface 15a and the second driving inclined surface 16a are arranged relatively parallel.

[0075] Preferably, Figure 2A As shown, when the interlocking rod 3 is in the second position, the circuit breaker is in the open state and the cabinet door 14 is in the closed state, the rotary handle 13 rotates in the first direction, and the linkage plate driving finger 5a cooperates with the interlocking rod curved surface 3d to drive the interlocking rod 3 to rotate to the first position past the critical position. Then, the spring 9 drives the interlocking rod 3 to automatically swing to the third position.

[0076] Specifically, such as Figure 1 As shown, the interlocking rod 3 is in the first position, and the interlocking rod locking end 3c of the interlocking rod 3 is opposite to the small-diameter side wall 50b of the linkage plate 5 and contacts the linkage plate locking platform 5b to prevent the rotary handle 13 from rotating in the first direction (counterclockwise) (i.e., preventing the circuit breaker from closing); Figure 2A As shown, when the interlocking rod 3 is in the second position, the cabinet door 14 is opened, and the first driving inclined surface 15a of the locking driving arm 15 drives the interlocking rod 3 to rotate toward the first position. After the interlocking rod 3 rotates past the critical position, the interlocking rod 3 continues to rotate to the first position driven by the spring 9 and locks with the linkage plate 5, entering Figure 1 The status shown; Figure 1 As shown, when the interlocking rod 3 is in the first position, the circuit breaker is in the closed state and the cabinet door 14 is in the open state, the cabinet door 14 is closed, and the second driving inclined surface 16a of the unlocking driving arm 16 drives the interlocking rod 3 to rotate in the opposite direction of the second position to the third position (the third position is between the first position and the critical position), so that the interlocking rod 3 and the linkage plate 5 are unlocked, and the interlocking rod 3 is limitedly engaged with the unlocking driving arm hook 16b to prevent the cabinet door 14 from being opened, and the cabinet door 14 is opened. Figure 3A and 3B The circuit breaker can be closed at this time. Figure 2AAs shown, when the interlocking rod 3 is in the second position and the cabinet door 14 is in the open state, the rotary handle 13 is rotated in the first direction (counterclockwise), and the interlocking rod 3 is driven to rotate in the direction of the first position through the linkage plate 5. After the interlocking rod 3 rotates past the critical position, the interlocking rod 3 is driven by the spring 9 to rotate to the first position, entering Figure 1 The status shown; Figure 2A As shown, when the interlocking rod 3 is in the second position and the cabinet door 14 is in the closed state, the rotary handle 13 is rotated in the first direction (counterclockwise), and the interlocking rod 3 is driven to rotate in the direction of the first position through the linkage plate 5. After the interlocking rod 3 rotates past the critical position, the interlocking rod 3 is driven by the spring 9 to rotate to the third position, entering the Figure 3A Status shown.

[0077] Preferably, Figure 9 As shown in FIG. 1 , an embodiment of the traction rod 8 is shown: the traction rod 8 comprises a traction rod connecting portion 8a, a traction rod main body 8c and a traction rod limiting portion 8b. The two ends of the traction rod main body 8c are respectively connected to the traction rod connecting portion 8a and the traction rod limiting portion 8b. The traction rod connecting portion 8a is rotationally connected to the interlocking rod 3. The traction rod limiting portion 8b is limitedly engaged with the traction rod limiting rib 478 of the housing 4. The outer diameter of the traction rod main body 8c is larger than the outer diameter of the traction rod limiting portion 8b. Further, as Figure 9 As shown, the traction rod connecting portion 8a is a flat plate structure, and a traction rod connecting hole 80a is provided in the middle.

[0078] Preferably, Figure 7 As shown in FIG. 1 , an embodiment of the interlocking rod 3 is shown. The interlocking rod 3 includes a first arm, a second arm and a third arm. The first arm, the second arm and the third arm are connected at one end and form a Y-shaped structure as a whole. An interlocking rod shaft hole 3g is provided in the middle of the Y-shaped structure. An interlocking rod curved surface 3d is provided between the second arm and the third arm. The free end of the second arm is the locking end 3c of the interlocking rod. The free end of the first arm passes through the housing 4 and protrudes outside the housing 4 to form an interlocking rod interlocking portion 3a. Further, as shown in FIG. Figure 7 As shown, the interlocking rod 3 further includes an interlocking rod connecting portion 3f rotatably connected to the traction rod 8. The interlocking rod connecting portion 3f is located between the first arm and the third arm of the interlocking rod and is arranged opposite to the second arm of the interlocking rod.

[0079] Preferably, Figure 7 As shown, the first arm of the interlocking rod includes a first side edge 3b and a second side edge 3e that are arranged opposite to each other and are respectively limitedly engaged with two ends of the housing opening 40 of the housing 4.

[0080] Preferably, Figure 6As shown, the manual operating mechanism of the circuit breaker of the present invention further includes a knob 10 that is rotatably arranged on the housing 4. The knob 10 is connected to the interlocking rod 3 by driving. One end of the knob 10 is located on the side of the rotary handle 13 and is the knob operating end. When the knob operating end is turned, the interlocking rod 3 is driven to swing back and forth through the knob 10. Figure 1-4 As shown, the interlocking rod 3 is fixedly connected to the knob 10 via an interlocking rod screw 2 .

[0081] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A manual operating mechanism for a circuit breaker, characterized in that: The invention comprises a rotary handle (13), a housing (4), a linkage plate (5), an interlocking rod (3), a traction rod (8) and a spring (9) arranged in the housing (4); the rotary handle (13) is rotatably arranged on the housing (4) and is driven and connected with the linkage plate (5); the rotary handle (13) and the linkage plate (5) rotate synchronously; the interlocking rod (3) is pivotally arranged on the housing (4) and is driven and matched with the linkage plate (5); one end of the traction rod (8) is rotatably connected with the interlocking rod (3) and the other end is limitedly matched with the housing (4); the spring (9) is sleeved on the traction rod (8); the interlocking rod (3) switches between a first position and a second position by reciprocating swing, and the spring (9) applies a first action force and a second action force to the interlocking rod (3) respectively, so that the interlocking rod (3) is respectively maintained in the first position and the second position; the first action force makes the interlocking rod (3) have a tendency to rotate clockwise, and the second action force makes the interlocking rod (3) have a tendency to rotate counterclockwise.

2. The circuit breaker manual operating mechanism according to claim 1, characterized in that: When the interlocking rod (3) is in the first position, the rotation center of the interlocking rod (3) is located on one side of the axis of the traction rod (8); when the interlocking rod (3) is in the second position, the rotation center of the interlocking rod (3) is located on the other side of the axis of the traction rod (8).

3. The manual operating mechanism of a circuit breaker according to claim 1, characterized in that: When the interlocking rod (3) is in the first position, the interlocking rod (3) and the linkage plate (5) are locked and matched to prevent the rotary handle (13) from rotating in the first direction; when the interlocking rod (3) is in the second position, the rotary handle (13) rotates in the first direction, and after the interlocking rod (3) is driven by the linkage plate (5) to rotate past the critical position, the interlocking rod (3) rotates to the first position.

4. The manual operating mechanism of a circuit breaker according to claim 3, characterized in that: The circuit breaker manual operating mechanism further comprises a driving member, which is mounted on a cabinet door (14) of a circuit breaker assembly cabinet for mounting the circuit breaker, and the driving member and the cabinet door (14) move synchronously; When the interlocking rod (3) is in the second position, the circuit breaker is in the off state, and the cabinet door (14) is in the closed state, the cabinet door (14) is opened, and the driving member drives the interlocking rod (3) to rotate past the critical position, and the interlocking rod (3) rotates to the first position and locks with the linkage plate (5). At this time, the cabinet door (14) is closed, and the driving member drives the interlocking rod (3) to rotate in the direction of the second position to the third position, so that the interlocking rod (3) and the linkage plate (5) are released from the locking engagement, and the driving member and the interlocking rod (3) are limitedly engaged, thereby preventing the cabinet door (14) from opening.

5. The manual operating mechanism of a circuit breaker according to claim 4, characterized in that: The interlocking rod (3) includes an interlocking rod curved surface (3d) arranged at one end thereof, and the linkage plate (5) includes a linkage plate driving finger (5a). The linkage plate driving finger (5a) drives and cooperates with the interlocking rod curved surface (3d) to make the interlocking rod (3) swing back and forth.

6. The circuit breaker manual operating mechanism according to claim 5, characterized in that: The interlocking rod curved surface (3d) is a C-shaped curved surface; the linkage plate driving finger (5a) is arranged at one radial end of the linkage plate (5).

7. The manual operating mechanism of a circuit breaker according to claim 4, characterized in that: The interlocking rod (3) includes an interlocking rod locking end (3c), and the linkage plate (5) includes a linkage plate locking platform (5b). The interlocking rod locking end (3c) and the linkage plate locking platform (5b) are locked and matched to prevent the rotary handle (13) from rotating in the first direction.

8. The manual operating mechanism of a circuit breaker according to claim 7, characterized in that: The linkage plate (5) comprises a small-diameter side wall (50b) and a large-diameter side wall (51b) sequentially arranged along its circumference, the outer diameter of the small-diameter side wall (50b) being smaller than the outer diameter of the large-diameter side wall (51b), and a linkage plate locking platform (5b) is formed at the connection between the small-diameter side wall (50b) and the large-diameter side wall (51b); When the interlocking rod (3) is located at the first position and locked with the linkage plate (5), the interlocking rod locking end (3c) is opposite to the small-diameter side wall (50b) and contacts the linkage plate locking platform (5b).

9. The circuit breaker manual operating mechanism according to any one of claims 4 to 8, characterized in that: One end of the interlocking rod (3) passes through the housing (4) and protrudes outside the housing; the housing (4) is provided with a housing opening (40) for the interlocking rod (3) to pass through and for limiting the swing stroke of the interlocking rod (3); the end of the interlocking rod (3) protruding outside the housing (4) cooperates with the driving member.

10. The manual operating mechanism of a circuit breaker according to claim 9, characterized in that: The driving member comprises a locking driving arm (15) and an unlocking driving arm (16) which are arranged opposite to each other, and the interlocking rod (3) is located between the locking driving arm (15) and the unlocking driving arm (16); When the interlocking rod (3) is in the second position, the circuit breaker is in the off state, and the cabinet door (14) is in the closed state, the cabinet door (14) is opened, and the locking driving arm (15) drives the interlocking rod (3) to rotate past the critical position, and the interlocking rod (3) rotates to the first position and locks with the linkage plate (5), preventing the rotary handle (13) from rotating in the first direction. At this time, the cabinet door (14) is closed, and the unlocking driving arm (16) drives the interlocking rod (3) to rotate in the direction of the second position to the third position, so that the interlocking rod (3) and the linkage plate (5) are released from the locking cooperation, and the driving member and the interlocking rod (3) are limited and cooperated, preventing the cabinet door (14) from opening.

11. The circuit breaker manual operating mechanism according to claim 10, characterized in that: The locking drive arm (15) includes a first driving inclined surface (15a). When the cabinet door (14) is opened, the moving direction of the first driving inclined surface (15a) is perpendicular to the rotation direction of the interlocking rod (3). The unlocking drive arm (16) includes a second driving inclined surface (16a) and an unlocking drive arm hook (16b). When the cabinet door (14) is closed, the moving direction of the second driving inclined surface (16a) is perpendicular to the rotation direction of the interlocking rod (3). After the cabinet door (14) is closed, the unlocking drive arm hook (16b) is in position-limiting cooperation with the interlocking rod (3).

12. The circuit breaker manual operating mechanism according to any one of claims 1 to 8, characterized in that: The housing (4) further comprises a traction rod limiting rib (478); one end of the traction rod (8) is rotationally connected to the interlocking rod (3), and the other end is limitedly engaged with the traction rod limiting rib (478); the spring (9) is sleeved on the traction rod (8), and the two ends are respectively limitedly engaged with the traction rod (8) and the traction rod limiting rib (478).

13. The circuit breaker manual operating mechanism according to claim 12, characterized in that: The traction rod limiting rib (478) includes a traction rod limiting groove (48); one end of the traction rod (8) is rotatably connected to the interlocking rod (3), and the other end is inserted into the traction rod limiting groove (48).

14. The circuit breaker manual operating mechanism according to claim 13, characterized in that: The circuit breaker manual operating mechanism further comprises a contact piece (7) arranged on the traction rod limiting rib (478), and the contact piece (7) limits the traction rod (8) in the traction rod limiting groove (48).

15. The circuit breaker manual operating mechanism according to any one of claims 1 to 8, characterized in that: The traction rod (8) comprises a traction rod connecting portion (8a), a traction rod main body (8c) and a traction rod limiting portion (8b); the two ends of the traction rod main body (8c) are respectively connected to the traction rod connecting portion (8a) and the traction rod limiting portion (8b); the traction rod connecting portion (8a) is rotationally connected to the interlocking rod (3); the traction rod limiting portion (8b) is in limited engagement with a traction rod limiting rib (478) of the housing (4); and the outer diameter of the traction rod main body (8c) is greater than the outer diameter of the traction rod limiting portion (8b).

16. The circuit breaker manual operating mechanism according to any one of claims 1 to 8, characterized in that: The interlocking rod (3) comprises an interlocking rod first arm, an interlocking rod second arm and an interlocking rod third arm. The interlocking rod first arm, the interlocking rod second arm and the interlocking rod third arm are connected at one end and form a Y-shaped structure as a whole. An interlocking rod shaft hole (3g) is provided in the middle of the Y-shaped structure. An interlocking rod curved surface (3d) is provided between the interlocking rod second arm and the interlocking rod third arm. The free end of the interlocking rod second arm is the interlocking rod locking end (3c). The free end of the interlocking rod first arm passes through the outer shell (4) and protrudes outside the outer shell (4) to form an interlocking rod interlocking portion (3a).

17. The circuit breaker manual operating mechanism according to claim 16, characterized in that: The interlocking rod (3) further comprises an interlocking rod connecting portion (3f) rotatably connected to the traction rod (8); the interlocking rod connecting portion (3f) is located between the first arm of the interlocking rod and the third arm of the interlocking rod and is arranged opposite to the second arm of the interlocking rod.

18. The manual operating mechanism of a circuit breaker according to claim 1, characterized in that: The circuit breaker manual operating mechanism further comprises a knob (10) rotatably arranged on the housing (4), the knob (10) being drive-connected to the interlocking rod (3), one end of the knob (10) being located on one side of the rotary handle (13) and serving as a knob operating end; by rotating the knob operating end, the interlocking rod (3) is driven to swing back and forth via the knob (10).

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