Guiding driving mechanism for bridge type contact of universal circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a guide driving mechanism for a bridge-type contact of a universal circuit breaker, which is reasonable in structural design and mainly comprises a base frame, a pivotal bearing, a hollow shaft, a contact blade, a guide blade, a photoelectric sensor, a stroke feedback plate, a side support and a reflector. When the contact blade needs to be driven to be in contact with the circuit breaker body busbar and the drawer seat busbar, the pivotal bearing is started, the pivotal bearing drives the hollow shaft and the contact blade on the hollow shaft to rotate, the guide blades are installed on the two sides of the contact blade, and the design of the guide blades enables the contact blade to be smoothly clamped into clamping grooves reserved in the circuit breaker body busbar and the drawer seat busbar; the photoelectric sensor is matched with a plurality of reflectors arranged in the stroke feedback plate, and the rotating speed and the position of the contact blade can be determined according to a reflected light signal received by the photoelectric sensor, so that the clamping accuracy of the contact blade with the circuit breaker body busbar and the drawer seat busbar is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a guiding and driving mechanism for a bridge-type contact of an air circuit breaker. Background Technique

[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scopes. A low-voltage circuit breaker, also known as an automatic switch and commonly called an "air switch", is also a low-voltage circuit breaker. It is an electrical appliance that has the function of a manual switch and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they have serious overload, short-circuit, and undervoltage faults, it can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-heat relay, etc. Moreover, generally no components need to be changed after breaking the fault current, and it has been widely used.

[0003] Most of the existing bridge-type contacts of air circuit breakers adopt the method of manual screwing, such as a rotary clamping electrical connection mechanism disclosed in the patent with the publication number CN104332910B. However, due to the heavy weight of the circuit breaker body, a large operating force needs to be overcome. In addition, after multiple groups of main body busbars come into contact with the bridge-type contact, since the bridge-type contact itself has a large clamping force, the insertion and extraction force and friction force that the busbar needs to overcome when inserting into the bridge-type contact are very large, which further increases the operating force of the mechanism and increases the operating difficulty and complexity of the mechanism.

[0004] In view of this, the inventor hopes to provide a guiding and driving mechanism for a bridge-type contact of an air circuit breaker, which can realize the automatic rotation action of the bridge-type contact of the air circuit breaker according to requirements and provide rotational guidance for the turning of the contact piece. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above problems existing in the traditional technology and provide a guiding and driving mechanism for a bridge-type contact of an air circuit breaker.

[0006] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0007] A guiding drive mechanism for a bridge-type contact of a universal circuit breaker, comprising a base frame, a slewing bearing, a hollow shaft, contact pieces, guiding pieces, a photoelectric sensor, a stroke feedback plate, side brackets and a reflector. A hollow shaft capable of rotating along its own axis and a slewing bearing for driving the hollow shaft to rotate are installed on the base frame. A plurality of contact pieces are arranged side by side on the hollow shaft. An annular part embedded in the hollow shaft is provided in the middle of the contact piece. Guiding pieces are fixed on both sides of the contact piece. A photoelectric sensor is embedded and installed on the outer side of one end of the hollow shaft. Both ends of the stroke feedback plate are fixed to the base frame through side brackets. Reflectors cooperating with the photoelectric sensor are evenly distributed on the inner side of the stroke feedback plate.

[0008] Further, in the guiding drive mechanism for the bridge-type contact of the universal circuit breaker, the slewing bearing is a slewing mechanism with an outer ring rotating and an inner ring supporting. The inner ring of the slewing bearing is fixed to the base frame, and the outer ring of the slewing bearing is fixed to the inner wall of the hollow shaft.

[0009] Further, in the guiding drive mechanism for the bridge-type contact of the universal circuit breaker, a plurality of annular embedding grooves cooperating with the annular part in the contact piece are axially provided on the outer side of the hollow shaft.

[0010] Further, in the guiding drive mechanism for the bridge-type contact of the universal circuit breaker, the thickness of the guiding piece gradually becomes smaller from the inside to the outside, and the maximum thickness value at the inner end of the guiding piece is equal to the thickness value of the contact piece.

[0011] Further, in the guiding drive mechanism for the bridge-type contact of the universal circuit breaker, the guiding piece is made of insulating plastic material.

[0012] Further, in the guiding drive mechanism for the bridge-type contact of the universal circuit breaker, a controller is further included. The controller is respectively connected to the slewing bearing and the photoelectric sensor. The controller can determine the rotation speed and position of the contact piece according to the reflected light signal received by the photoelectric sensor. The controller is communicatively connected to the background terminal through a wireless communication module.

[0013] The beneficial effects of the present utility model are:

[0014] The structure of the utility model is reasonably designed. It mainly consists of a base frame, a slewing bearing, a hollow shaft, a contact piece, a guiding piece, a photoelectric sensor, a stroke feedback plate, a side bracket and a reflector. Each component cooperates with each other. When it is necessary to drive the contact piece to contact with the main busbar of the circuit breaker body and the main busbar of the drawer seat, the slewing bearing is started. The slewing bearing drives the hollow shaft and the contact piece thereon to rotate. Guiding pieces are installed on both sides of the contact piece. The design of the guiding pieces enables the contact piece to be smoothly clamped into the clamping grooves reserved on the main busbar of the circuit breaker body and the main busbar of the drawer seat. Multiple reflectors built in the photoelectric sensor and the stroke feedback plate cooperate with each other. According to the reflected light signals received by the photoelectric sensor, the rotation speed and position of the contact piece can be determined, so as to ensure the accuracy of the clamping of the contact piece with the main busbar of the circuit breaker body and the main busbar of the drawer seat.

[0015] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is the overall structural schematic diagram of the utility model;

[0018] Figure 2 is the position schematic diagram when the contact piece in the utility model does not contact with the main busbar of the circuit breaker body and the main busbar of the drawer seat;

[0019] Figure 3 is the position schematic diagram when the contact piece in the utility model contacts with the main busbar of the circuit breaker body and the main busbar of the drawer seat;

[0020] Figure 4 is the structural schematic diagram of the contact piece and the guiding piece in the utility model;

[0021] Figure 5 is the structural schematic diagram of the stroke feedback plate and the components thereon in the utility model;

[0022] In the drawings, the descriptions of the components represented by each reference numeral are as follows:

[0023] 1 - Base frame, 2 - Slewing bearing, 3 - Hollow shaft, 4 - Contact piece, 5 - Guiding piece, 6 - Photoelectric sensor, 7 - Stroke feedback plate, 8 - Side bracket, 9 - Reflector. Detailed Embodiment

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0025] As Figures 1 - 5 shown, this embodiment provides a guiding and driving mechanism for the bridge-type contact of a universal circuit breaker, including a base frame 1, a slewing bearing 2, a hollow shaft 3, contact pieces 4, guiding pieces 5, a photoelectric sensor 6, a stroke feedback plate 7, a side bracket 8, and a reflector 9. A hollow shaft 3 capable of rotating along its own axis and a slewing bearing 2 for driving the hollow shaft 3 to rotate are installed on the base frame 1. A plurality of contact pieces 4 are fixedly installed side by side on the hollow shaft 3. An annular portion embedded in the hollow shaft 3 is provided in the middle of the contact piece 4. Guiding pieces 5 are fixed on both sides of the contact piece 4. A photoelectric sensor 6 is embedded and installed on the outer side of one end of the hollow shaft 3. Both ends of the stroke feedback plate 7 are fixed to the base frame 1 through the side bracket 8. Reflectors 9 cooperating with the photoelectric sensor 6 are evenly distributed on the inner side of the stroke feedback plate 7.

[0026] In this embodiment, the slewing bearing 2 is a slewing mechanism with an outer ring rotating and an inner ring supporting. The inner ring of the slewing bearing 2 is fixed to the base frame 1, and the outer ring of the slewing bearing 2 is fixed to the inner wall of the hollow shaft 3.

[0027] In this embodiment, a plurality of annular embedding grooves cooperating with the annular portion in the contact piece 4 are axially provided on the outer side of the hollow shaft 3.

[0028] In this embodiment, the thickness of the guiding piece 5 gradually decreases from the inside to the outside, and the maximum thickness value at the inner end of the guiding piece 5 is equal to the thickness value of the contact piece 4.

[0029] In this embodiment, the guiding piece 5 is made of an insulating plastic material.

[0030] In this embodiment, a controller is further included. The controller is respectively connected to the slewing bearing 2 and the photoelectric sensor 6. The controller can determine the rotation speed and position of the contact piece 4 according to the reflected light signal received by the photoelectric sensor 6. The controller is communicatively connected to the background terminal through a wireless communication module.

[0031] A specific application of this embodiment is as follows: The guiding and driving mechanism of this application mainly consists of a base frame 1, a slewing bearing 2, a hollow shaft 3, a contact piece 4, a guiding piece 5, a photoelectric sensor 6, a stroke feedback plate 7, a side bracket 8, and a reflector 9. Each component cooperates with each other. When it is necessary to drive the contact piece 4 to contact the main busbar of the circuit breaker body and the main busbar of the drawer seat, the slewing bearing 2 is started. The slewing bearing 2 drives the hollow shaft 3 and the contact piece 4 thereon to rotate. Guiding pieces 5 are installed on both sides of the contact piece 4. The design of the guiding pieces 5 enables the contact piece 4 to be smoothly clamped into the clamping grooves reserved on the main busbar of the circuit breaker body and the main busbar of the drawer seat. The photoelectric sensor 6 and multiple reflectors 9 built in the stroke feedback plate 7 cooperate with each other. According to the reflected light signal received by the photoelectric sensor 6, the rotation speed and position of the contact piece 4 can be determined, thereby ensuring the accuracy of the clamping of the contact piece 4 with the main busbar of the circuit breaker body and the main busbar of the drawer seat.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A guide drive mechanism for a universal circuit breaker bridge contact, characterized in that: It includes a base frame, a slewing bearing, a hollow shaft, a contact piece, a guide piece, a photoelectric sensor, a stroke feedback plate, a side bracket and a reflector. The base frame is provided with a hollow shaft that can rotate along its own axis and a slewing bearing for driving the hollow shaft to rotate. A plurality of contact pieces are installed side by side on the hollow shaft. The middle part of the contact piece is provided with an annular part embedded in the hollow shaft. Guide pieces are fixed on both sides of the contact piece. A photoelectric sensor is embedded and installed on the outer side of one end of the hollow shaft. The two ends of the stroke feedback plate are fixed to the base frame through side brackets. The inner side of the stroke feedback plate is evenly distributed with reflectors that cooperate with the photoelectric sensor.

2. The guide drive mechanism of the bridge contact of the universal circuit breaker according to claim 1, characterized in that: The slewing bearing is a slewing mechanism with a rotating outer ring and supported inner ring. The inner ring of the slewing bearing is fixed to a base frame, and the outer ring of the slewing bearing is fixed to the inner wall of a hollow shaft.

3. The guide drive mechanism of the bridge contact of the universal circuit breaker according to claim 2, characterized in that: The outer side of the hollow shaft is axially provided with a plurality of annular embedding grooves which match the annular portions in the contact pieces.

4. The guide drive mechanism of the bridge contact of the universal circuit breaker according to claim 3, characterized in that: The thickness of the guide piece gradually decreases from the inside to the outside, and the maximum thickness value of the inner end of the guide piece is equal to the thickness value of the contact piece.

5. The guide drive mechanism of the bridge contact of the universal circuit breaker according to claim 4, characterized in that: The guide piece is made of insulating plastic material.

6. The guide drive mechanism of the bridge contact of the universal circuit breaker according to claim 5, characterized in that: It also includes a controller, which is connected to the slewing bearing and the photoelectric sensor respectively. The controller can determine the rotation speed and position of the contact piece according to the reflected light signal received by the photoelectric sensor. The controller is connected to the background terminal through a wireless communication module.

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