CN107818879A - Plug-in moulded case circuit breaker interlock - Google Patents

Abstract

A plug-in molded case circuit breaker interlocking device, characterized in that it includes a bracket (1), the rocker arm (2) is mounted on the bracket (1) through a first rivet shaft (3), and the cam arm (4) passes through The second rivet shaft (5) is mounted on the bracket (1), the rocker arm (2) can swing around the first rivet shaft (3), and the cam arm (4) can swing around the second rivet shaft (5) , the cam arm (4) is linked with the rocker arm (2), the rocker arm (2) is reset by the first torsion spring (7), and the cam arm (4) is reset by the second torsion spring (8); the present invention The overall installation is adopted, the installation is simple, and the operation reliability is high, which overcomes the shortcomings of the existing circuit breaker interlocking device that requires a deep space for the socket to meet the needs of installation and movement.

Description

Plug-in molded case circuit breaker interlocking device

technical field

The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an interlocking device of a plug-in molded case circuit breaker.

Background technique

The plug-in circuit breaker can separate or connect the circuit breaker and the socket by plugging in and out, which brings convenience to use and maintenance. For operator safety, regulations do not allow unplugging or plugging in while the circuit breaker is energized. The usual approach is to make sure the breaker is off when it is about to be plugged into or about to be unplugged from an outlet. This purpose can be achieved by interlocking devices.

The existing interlocking devices for plug-in molded case circuit breakers usually consist of two components, such as a rocker mechanism and a cam mechanism. The rocker mechanism is installed on the circuit breaker body, and the cam mechanism is installed on the socket. When the circuit breaker is plugged into or pulled out of the socket, the cam mechanism changes the state of the rocker mechanism, and the rocker mechanism then affects the state of the tripping mechanism of the circuit breaker, so that the circuit breaker remains tripped during the process of plugging in or pulling out the socket. state.

The current plug-in molded case circuit breaker interlocking device already has a mechanical interlocking function, and can detect when the circuit breaker is not plugged into the socket. The technical solution disclosed in Chinese patent CN200953291Y (interlocking device for drawer-type plastic case circuit breaker) can realize the above functions. However, the interlocking device of this technical solution needs to be installed on the circuit breaker body and the socket respectively, which is inconvenient to install and reduces the reliability of the action. This technical defect is pointed out by the invention patent authorization announcement number CN102427205B (the interlocking device of the withdrawable circuit breaker) and is made up for by the technical scheme provided by CN102427205B. However, there is still a problem in the above-mentioned existing technical solutions, that is, the socket needs to have a relatively deep space to meet the installation and movement requirements of the interlocking device.

Contents of the invention

The object of the present invention is to provide an integrated installation, reliable operation, and a space for the socket in view of the above-mentioned shortcomings of the existing molded case circuit breaker interlocking device, such as separate installation, low operational reliability, and the need for a deep space for the socket. Interlocking devices for plug-in molded case circuit breakers with low depth requirements. It only needs to be installed on the body, and the socket needs a shallow space.

Technical solutions

In order to achieve the above-mentioned technical purpose, a plug-in molded case circuit breaker interlocking device designed by the present invention is characterized in that it includes a bracket, the rocker arm is mounted on the bracket through the first rivet shaft, and the cam arm is mounted on the bracket through the second rivet shaft. On the bracket, the rocker arm can swing around the first rivet shaft, the cam arm can swing around the second rivet shaft, the cam arm is linked with the rocker arm, the rocker arm is reset by the first torsion spring, and the cam arm Reset by the second torsion spring;

The rocker arm is connected with a pull rod, which drives the pull rod to move up and down during the swinging process of the rocker arm;

The bracket is provided with a limit column, which can limit the swing position of the cam arm.

Further, the first torsion spring is installed on the rocker sleeve protruding from the rocker arm, one end is installed in hole one on the rocker arm, and the other end is against the surface of the bracket.

Further, the second torsion spring is installed on the shaft sleeve, one end is inserted into the second hole of the bracket, and the other end is hung on the cam arm, and the shaft sleeve is sleeved on the second rivet shaft.

Further, the first rivet shaft and the second rivet shaft are fixedly mounted on the bracket.

Further, the cam arm includes a cam and a cam lever, and the driving surface on the cam is in contact with the linkage column protruding from the rocker arm, and the driving surface successively includes a first driving surface, a second driving surface and a third driving surface, and the cam During the swinging process of the arm, the first driving surface, the second driving surface and the third driving surface are in contact with the linkage column in turn, and the rocker arm moves back and forth under the action of the first driving surface, the second driving surface, the third driving surface and the first torsion spring. swing.

Further, one end of the pull rod is installed on the connecting shaft, and the other end passes through the bracket. The connecting shaft is fixedly installed in the waist-shaped hole of the rocker arm, and the connecting shaft is limited by a circlip.

Further, the pull rod extends into the circuit breaker and corresponds to the tripping shaft.

Beneficial effect

The plug-in molded case circuit breaker interlock device provided by the present invention adopts the form of integral installation, which is simple to install and has high operational reliability, and overcomes the need for a deep space for the socket to be installed by the existing plug-in molded case circuit breaker interlock device. Shortcomings that meet the needs of interlock installation and movement.

Description of drawings

Accompanying drawing 1 is the structural representation of the embodiment of the present invention.

Accompanying drawing 2 is the structural diagram of the initial state of the embodiment of the present invention.

Accompanying drawing 3 is the schematic diagram of the installation structure of the tie rod in the embodiment of the present invention.

Accompanying drawing 4 is the schematic diagram of the support structure in the embodiment of the present invention.

Accompanying drawing 5 is the structural diagram of rocker arm in the embodiment of the present invention.

Accompanying drawing 6 is the schematic diagram of the structure of the cam arm in the embodiment of the present invention.

Accompanying drawing 7 is the schematic diagram of rocker arm motion state in the embodiment of the present invention.

Accompanying drawing 8 is the schematic diagram of the state that the cam arm rotates to the maximum angle in the embodiment of the present invention.

Accompanying drawing 9 is a schematic diagram of the state when the circuit breaker is closed and not inserted into the socket in the embodiment of the present invention.

Figure 10 is a schematic diagram of the state when the circuit breaker is tripped and inserted into the socket in the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figures 1 to 5, a plug-in molded case circuit breaker interlocking device includes a bracket 1, a rocker arm 2 mounted on the bracket 1 through a first rivet shaft 3, and a cam arm 4 through a second rivet shaft 5 Installed on the bracket 1, the rocker arm 2 can swing around the first rivet shaft 3, the cam arm 4 can swing around the second rivet shaft 5, the cam arm 4 is linked with the rocker arm 2, and the rocker arm 2 passes through the first A torsion spring 7 resets, and the first torsion spring 7 is contained on the rocker cover 201 that stretches out on the rocker arm 2, and one end is contained in the hole one 202 on the rocker arm 2, and the other end is against the support 1 surface. Described cam arm 4 resets by second torsion spring 8, and described second torsion spring 8 is contained on the axle sleeve 13, and one end is inserted in the hole two 101 of support 1, and the other end is hung on the cam arm 4, and described The shaft sleeve 13 is sleeved on the second rivet shaft 5 . The rocker arm 2 is connected with a pull rod 10, which drives the pull rod 10 to move up and down during the swing process of the rocker arm 2. One end of the pull rod 10 is mounted on the connecting shaft 12, and the other end passes through the bracket 1. The connecting shaft 12 is fixed on the rocker arm 2. In the waist-shaped hole 204, the connecting shaft 12 is limited by the snap ring 11. The pull rod 10 extends into the circuit breaker and corresponds to the tripping shaft 9 .

The bracket 1 is provided with a limit column 6, which can limit the swing position of the cam arm 4.

The first rivet shaft 3 and the second rivet shaft 5 are fixedly mounted on the bracket 1 .

Specifically, as shown in FIG. 6 , the cam arm 4 includes a cam 401 and a cam lever 402. The driving surface 401a on the cam 401 is in contact with the linkage column 203 protruding from the rocker arm 2, and the driving surface 401a is in turn Including the first driving surface 401a01, the second driving surface 401a02 and the third driving surface 401a03, during the swinging process of the cam arm 4, the first driving surface 401a01, the second driving surface 401a02 and the third driving surface 401a03 contact with the linkage column 203 in turn, The rocker arm 2 swings back and forth under the action of the first driving surface 401a01 , the second driving surface 401a02 and the third driving surface 401a03 and the first torsion spring 7 . The first driving surface 401a01 is an inclined surface capable of driving the rocker arm 2 to rotate the waist-shaped hole 204 of the rocker arm 2 downward; the second driving surface 401a02 is an arc surface capable of maintaining the position of the rocker arm 2; The driving surface 401a03 is an inclined surface capable of driving the rocker arm 2 to rotate the waist-shaped hole 204 of the rocker arm 2 downward.

The working process of the present invention is: as shown in accompanying drawing 2, accompanying drawing 7 and accompanying drawing 8, when cam arm 4 is not subjected to external force, cam arm 4 is subjected to the force of second torsion spring 8, and cam lever 402 pushes against support 1 At this time, the rocker arm 2 is subjected to the force of the first torsion spring 7, the linkage column 203 is pushed against the first driving surface 401a01, the waist-shaped hole 204 on the rocker arm 2 is at the highest position, and the pull rod 10 The end faces are at their highest position.

When the cam arm 4 is subjected to external force, it starts to rotate, and the first driving surface 401a01 of the cam arm 4 pushes the linkage column 203, so that the rocker arm 2 rotates, and the waist-shaped hole 204 on the rocker arm 2 rotates downward, driving the end face of the pull rod 10 downward. move.

When the cam arm 4 continues to rotate, the cam arm 4 continues to push the rocker arm 2 to rotate. When the second driving surface 401a02 of the cam arm 4 contacts the linkage post 203 of the rocker arm 2, the rocker arm 2 rotates to the maximum angle, and the rocker arm 2 The waist-shaped hole 204 on the top moves to the lowest position, driving the end face of the pull rod 9 to be at the lowest position. During the contact process between the second driving surface 401a02 and the linkage column 203, the position of the waist-shaped hole 204 remains unchanged, and the position of the end surface of the pull rod 10 remains unchanged.

When the cam arm 4 continued to rotate to the maximum angle, the linkage column 203 of the rocker arm 2 broke away from the second driving surface 401a02 of the cam arm 4, and the rocker arm 2 rotated under the action of the first torsion spring 7, so that the linkage column 203 of the rocker arm 2 20 against the third driving surface 401a03, the waist-shaped hole 204 of the rocker arm 2 moves upwards and returns to the highest position, driving the end surface of the pull rod 10 to return to the highest position.

After the cam arm 4 rotates to the maximum angle, if the external force disappears, the cam arm 4 rotates in the opposite direction under the action of the second torsion spring 8, and the third driving surface 401a03 of the cam arm 4 pushes the linkage post 203 of the rocker arm 2 to make the rocker When the arm 2 rotates, the waist-shaped hole 204 on the rocker arm 2 rotates downward, which drives the end face of the pull rod 10 to move downward.

When the cam arm 4 continues to rotate in the opposite direction, when the second driving surface 401a02 contacts the linkage column 203 of the rocker arm 2, the rocker arm 2 rotates to the maximum angle, and the waist-shaped hole 204 on the rocker arm 2 moves to the lowest position. The end face of the driving pull rod 10 is at the lowest position. During the contact process between the second driving surface 401a02 and the linkage post 203, the position of the waist-shaped hole 204 remains unchanged, so the position of the end surface of the pull rod 10 remains unchanged.

When the cam arm 4 continues to rotate in the opposite direction, the rocker arm 2 is subjected to the force of the first torsion spring 7, the linkage column 203 is pushed against the first driving surface 401a01, and the waist-shaped hole 204 on the rocker arm 2 rotates upwards, driving the end surface of the pull rod 10 Move up. When the cam lever 402 of the cam arm 4 was pushed against the limit post 6 of the support 1, the cam arm 4 stopped rotating. At this time, the waist-shaped hole 204 on the rocking arm 2 was at the highest position, and the end face of the driving pull rod 10 was at the highest position.

When the circuit breaker is in the closing or re-buckle state, the tripping shaft 9 is in the position shown in Figure 9; when the circuit breaker is in the tripping state, the tripping shaft 9 is in the position shown in Figure 10. During the buckle state, the tripping shaft 9 rotated a certain angle.

When the pull rod 10 of the interlock mechanism is not pulled down by the rocker arm 2, that is, the interlock mechanism is in the state shown in Figure 2, Figure 8, Figure 9 and Figure 10, and when the circuit breaker is in the state of closing, rebuckle or trip The buckle shaft 9 is not in contact with the end face of the pull rod 10, so the state of the circuit breaker is not affected by the interlock mechanism. When the pull rod 10 is pulled down by the rocker arm 2, if the circuit breaker is in the closing or re-buckle state, the end face of the pull rod 10 will push the tripping shaft 9 during the downward movement to make the circuit breaker trip.

As shown in Figure 9, when the circuit breaker is inserted into the socket in the closed state, the end face of the pull rod 10 will push the tripping shaft 9 during the downward movement, so that the circuit breaker will be tripped.

As shown in Figure 10, when the circuit breaker starts to be pulled out of the socket in the closed state, the end face of the pull rod 10 will push the tripping shaft 9 during the downward movement, so that the circuit breaker will be tripped.

The plug-in molded case circuit breaker interlocking device provided by the present invention adopts the form of integral installation, which is simple to install and has high operational reliability. The cam arm of the entire interlocking device can be rotated. When the circuit breaker is not inserted into the support, the cam arm The height is the highest, but in the process of inserting into the socket, as the cam arm rotates, the height of the cam arm gradually decreases, so compared with the traditional interlocking device, the requirement for the depth of the surface space of the socket is not high. The shortcoming that the existing circuit breaker interlocking device requires a deep space for the socket to meet the needs of installation and movement is overcome.

The structures, proportions, sizes, etc. shown in the accompanying drawings of this embodiment are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. condition, so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the present invention without affecting the effect and purpose of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "up", "down", "left", "right", "middle", "clockwise", and "counterclockwise" quoted in this specification are only for the convenience of description. It is not intended to limit the applicable scope of the present invention, and the change or adjustment of the relative relationship shall also be regarded as the applicable scope of the present invention without substantive changes in the technical content.

Claims (7)

1. A plug-in molded case circuit breaker interlocking device, characterized in that it includes a bracket (1), a rocker arm (2) mounted on the bracket (1) through a first rivet shaft (3), and a cam arm (4 ) is mounted on the bracket (1) through the second rivet shaft (5), the rocker arm (2) can swing around the first rivet shaft (3), and the cam arm (4) can swing around the second rivet shaft (5) ) swings, the cam arm (4) is linked with the rocker arm (2), the rocker arm (2) is reset by the first torsion spring (7), and the cam arm (4) is reset by the second torsion spring (8); The rocker arm (2) is connected with a pull rod (10), and the rocker arm (2) drives the pull rod (10) to move up and down during the swing process; The bracket (1) is provided with a limit column (6), which can limit the swing position of the cam arm (4). 2. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: the first torsion spring (7) is mounted on a rocker sleeve (201) protruding from the rocker arm (2). ), one end is installed in hole one (202) on the rocker arm (2), and the other end is against the surface of the bracket (1). 3. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: the second torsion spring (8) is installed on the shaft sleeve (13), and one end is inserted into the bracket (1 ), the other end is hung on the cam arm (4), and the axle sleeve (13) is sleeved on the second rivet shaft (5). 4. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: the first rivet shaft (3) and the second rivet shaft (5) are fixed on the bracket (1) . 5. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: the cam arm (4) includes a cam (401) and a cam lever (402), and the cam (401) The driving surface (401a) is in contact with the linkage column (203) protruding from the rocker arm (2), and the driving surface (401a) sequentially includes the first driving surface (401a01), the second driving surface (401a02) and the third driving surface surface (401a03), during the swinging process of the cam arm (4), the first driving surface (401a01), the second driving surface (401a02) and the third driving surface (401a03) are sequentially in contact with the linkage column (203), and the rocker arm (2 ) swing back and forth under the action of the first driving surface (401a01), the second driving surface (401a02), the third driving surface (401a03) and the first torsion spring (7). 6. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: one end of the pull rod (10) is mounted on the connecting shaft (12), and the other end passes through the bracket (1), The connecting shaft (12) is fixedly installed in the waist-shaped hole (204) of the rocker arm (2), and the connecting shaft (12) is limited by a snap ring (11). 7. A plug-in molded case circuit breaker interlocking device according to claim 1, characterized in that: the pull rod (10) extends into the circuit breaker and corresponds to the tripping shaft (9).