CN218469779U - Contact wear monitoring device and contactor - Google Patents

Abstract

The utility model provides a contact wear monitoring devices and contactor, relate to low-voltage apparatus technical field, which comprises a base, be provided with the static contact on the base and driven and the contact of static contact or the movable contact subassembly of separation, still be provided with on the base with movable contact subassembly drive complex displacement subassembly, still be provided with on the base with displacement subassembly matched with optical detection subassembly, when the contact position of movable contact subassembly and static contact squints, movable contact subassembly drive displacement subassembly displacement, optical detection subassembly is used for detecting the displacement volume of displacement subassembly. Therefore, the wear condition is monitored, a user can conveniently and timely master the wear condition of the contact, and early warning is realized. The mode that adopts optical detection subassembly to detect can realize non-contact measurement to effectively improve the life-span that detects, simultaneously, the mode that utilizes optical detection subassembly can also effectively simplify the structure, improves the degree of accuracy that detects.

Description

Contact wear monitoring device and contactor

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to a contact wear monitoring device and a contactor.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and higher requirements on electricity safety are met. The contactor is a device which can quickly cut off main circuits of alternating current and direct current and can frequently turn on and off a large-current control circuit, and the contactor not only can turn on and off the circuit, but also has the function of low-voltage release protection. The contactor has large control capacity, is suitable for frequent operation and remote control, and is one of important elements in an automatic control system.

The existing contactor has a moving contact and a fixed contact which can be contacted with each other or separated from each other, but as the service life increases, a silver point between the moving contact and the fixed contact can be continuously worn, and after the silver point is excessively worn, the stability and the safety of the contactor can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a contact wear monitoring device and contactor to the not enough among the above-mentioned prior art to the monitoring to the contact wearing and tearing condition is avoided appearing contact wearing and tearing excessively and phenomenon unknown.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

one aspect of the embodiment of the application provides a contact wear monitoring device, which comprises a base, wherein a fixed contact and a movable contact component which is driven to be in contact with or separated from the fixed contact are arranged on the base, a displacement component which is in driving fit with the movable contact component is further arranged on the base, an optical detection component which is matched with the displacement component is further arranged on the base, when the contact position of the movable contact component and the fixed contact deviates, the movable contact component drives the displacement component to displace, and the optical detection component is used for detecting the displacement of the displacement component.

Optionally, the optical detection assembly includes a light beam transmitter and a light beam receiver located on two opposite sides of the displacement assembly, the light beam receiver is configured to receive an outgoing light beam of the light beam transmitter, and the displacement assembly is provided with a light transmitting portion through which the outgoing light beam passes.

Optionally, the light beam receiver includes a receiving circuit board and a plurality of receiving probes distributed on the receiving circuit board, and the plurality of receiving probes are sequentially arranged along the displacement direction of the displacement assembly.

Optionally, a light homogenizing sheet is further disposed on the light emitting side of the light beam emitter.

Optionally, a baffle is further disposed on one side of the light-transmitting portion close to the movable contact assembly.

Optionally, the light beam emitter is an infrared emitter, and the light beam receiver is an infrared receiver.

Optionally, the contact wear monitoring device further includes a lever rotatably disposed on the base, one end of the lever is connected to the displacement assembly, the other end of the lever corresponds to the optical detection assembly, and a power arm of the lever is smaller than a resistance arm of the lever.

Optionally, the moving contact assembly comprises a first elastic element, and a moving contact support and a moving contact which are respectively connected with two opposite ends of the first elastic element, the moving contact is arranged on the moving contact support in a sliding manner, the moving contact support is driven by the moving contact support to drive the moving contact to be in contact with the fixed contact, and the moving contact support continues to move so as to enable the first elastic element to store energy; the displacement component is in driving fit with the moving contact.

Optionally, the displacement assembly includes a second elastic element and a transmission assembly slidably disposed on the movable contact support, the second elastic element is connected to the transmission assembly, and the second elastic element is configured to provide an acting force for the transmission assembly to abut against the movable contact.

In another aspect of the embodiments of the present application, there is provided a contactor including any of the contact wear monitoring devices described above.

The beneficial effect of this application includes:

the application provides a contact wear monitoring device and contactor, including the base, be provided with the static contact on the base and driven and the static contact or the movable contact subassembly of separation, still be provided with on the base with movable contact subassembly drive complex displacement subassembly, still be provided with on the base with displacement subassembly matched with optical detection subassembly, when the contact position of movable contact subassembly and static contact squints, movable contact subassembly drive displacement subassembly displacement, optical detection subassembly is used for detecting the displacement volume of displacement subassembly. Therefore, the abrasion condition is monitored, a user can conveniently master the abrasion condition of the contact in time, and early warning is realized. The mode that adopts optical detection subassembly to detect can realize non-contact measurement to effectively improve the life-span that detects, simultaneously, the mode that utilizes optical detection subassembly can also effectively simplify the structure, improves the degree of accuracy that detects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a contact wear monitoring device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a contact wear monitoring device in an open state according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a contact wear monitoring device in a closing state according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram illustrating a displacement assembly and an optical detection assembly according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram illustrating an arrangement of a plurality of probes in a light beam receiver according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating an optical detection assembly for detecting a contact wear according to an embodiment of the present disclosure;

fig. 7 is a second schematic view illustrating an optical detection assembly for detecting a contact wear according to an embodiment of the present disclosure;

fig. 8 is a third schematic view illustrating an optical detection assembly for detecting a contact wear according to an embodiment of the present disclosure;

FIG. 9 is a fourth schematic view illustrating an optical detection assembly for detecting a contact wear according to an embodiment of the present disclosure;

fig. 10 is a fifth schematic view illustrating an optical detection assembly for detecting a contact wear according to an embodiment of the present disclosure;

FIG. 11 is a schematic view of a displacement assembly and lever mating provided by an embodiment of the present application;

fig. 12 is a schematic diagram illustrating an unworn state of a contact wear monitoring device according to an embodiment of the present disclosure;

fig. 13 is a schematic diagram illustrating a state of a contact wear monitoring device according to an embodiment of the present application after wear.

Icon: 100-a base; 101-a positioning boss; 110-moving contact; 111-silver point of moving contact; 120-static contact; 121-silver point of static contact; 130-a displacement assembly; 131-a light-passing part; 132-a transfer component; 133-a second elastic member; 140-a light beam emitter; 141-a light emitting source; 142-an outgoing light beam; 150-a light beam receiver; 151-receiving probe; 160-an optical detection assembly; 170-lever; 180-moving contact support; 181-sliding hole; 190-a first elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. It should be noted that, in case of conflict, various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of the present application.

In the description of the present application, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In one aspect of the present embodiment, a contact wear monitoring device is provided, as shown in fig. 1, and includes a base 100, a moving contact assembly, a fixed contact 120, a displacement assembly 130, and an optical detection assembly 160, where the fixed contact 120 is fixedly disposed on the base 100, and the moving contact assembly is movably disposed on the base 100. When the circuit is controlled, the movable contact assembly may be driven by an external force to move relative to the base 100, so that the movable contact assembly contacts or separates from the fixed contact 120, thereby implementing the connection and disconnection of the circuit. For example: when the circuit needs to be connected, the moving contact component can be driven by external force to move towards the fixed contact 120 until the moving contact component contacts with the fixed contact 120 (as shown in the state of fig. 3) to complete closing, and the circuit is connected at the moment; when the circuit needs to be cut off, the movable contact component can move towards the direction away from the fixed contact 120, that is, the movable contact component is separated from the fixed contact 120 until the movable contact component is reset (as shown in fig. 2), so that the opening is completed, and the circuit is cut off at the moment.

It should be understood that the switching on and switching off of the moving contact assembly can be realized by the electromagnet and the elastic element, for example, the moving contact assembly is in driving connection with the moving iron core of the electromagnet, so that when the electromagnet is powered on, the moving iron core drives the moving contact assembly to contact with the static contact 120 to complete the switching on, the elastic element is connected with the moving contact assembly, and in the switching on process, the elastic element can store energy; when the switch needs to be opened, the electromagnet can be powered off, and at the moment, the elastic piece releases energy, so that the movable contact assembly and the movable iron core are driven to reset.

In order to ensure good contact between the moving contact and the static contact 120, silver points are correspondingly disposed on the moving contact component and the static contact 120, respectively, so that, as shown in fig. 3, when the moving contact component contacts with the static contact 120, the silver point 111 of the moving contact in the moving contact component contacts with the silver point 121 of the static contact. In long-term use, along with the increase of the times of closing and opening the brake and the influence of electric arcs, the silver points on the moving contact component and the static contact 120 are abraded, and therefore the displacement component 130 and the optical detection component 160 are added, the abrasion condition is monitored, a user can conveniently master the abrasion condition of the contact in time, and early warning is achieved.

Specifically, as shown in fig. 1, a displacement assembly 130 in driving fit with the movable contact assembly is further disposed on the base 100, and before the contact is not worn, as shown in fig. 3, when the movable contact assembly contacts with the fixed contact 120, the displacement assembly 130 abuts against the movable contact assembly. With the wear of the contact becoming worse, the position where the movable contact component contacts the fixed contact 120 gradually deviates, that is, the position where the movable contact component contacts the fixed contact 120 gradually moves from the movable contact 110 toward the fixed contact 120, in other words, the path of each closing of the movable contact component also gradually increases (the increase amount is the wear amount), in this process, the movable contact component synchronously drives the displacement component 130 to generate displacement when each closing, the displacement generated by the displacement component 130 is the wear amount between the movable contact component and the fixed contact 120, in other words, the displacement generated by the displacement component 130 can directly represent the wear amount of the contact. As shown in fig. 3, an optical detection assembly 160 for detecting the displacement of the displacement assembly 130 may be further provided, and non-contact measurement may be implemented by using the optical detection assembly 160 to detect the displacement, so as to effectively prolong the service life of detection, and meanwhile, the structure may be effectively simplified by using the optical detection assembly 160 to improve the accuracy of detection.

In some embodiments, in order to improve the detection accuracy, the optical detection component 160 should measure the displaced displacement component 130 after the movable contact component completes the closing. In addition, before the moving contact component and the static contact 120 are not abraded, initial calibration can be performed firstly, namely, when the moving contact component and the static contact 120 are in initial contact, the initial position of the displacement component 130 is calibrated, the initial position of the displacement component 130 at the moment is used as a reference, and the actual position of the displacement component 130 after the subsequent contact is abraded and when the moving contact component is at the switching-on position is compared, so that the detection of the displacement component 130 is realized, and therefore, the detection accuracy can be effectively improved.

In some embodiments, the optical detection component 160 may be a laser range finder, which may be fixedly disposed on the base 100, and the distance between the optical detection component and the displacement component 130 may be detected by the laser range finder, so as to obtain the displacement of the displacement component 130 by comparing with the initially calibrated distance.

In some embodiments, as shown in fig. 1, the optical detection assembly 160 further includes a light beam emitter 140 and a light beam receiver 150 located at two opposite sides of the displacement assembly 130, the light beam emitter 140 and the light beam receiver 150 may be respectively and fixedly disposed on the base 100, the light beam emitter 140 may correspondingly emit an outgoing light beam 142, as shown in fig. 4, the displacement assembly 130 is opaque, the displacement assembly 130 is further provided with a light-transmitting portion 131, and the outgoing light beam 142 may be received by the light beam receiver 150 through the light-transmitting portion 131 of the displacement assembly 130 when needed. Therefore, after the contact is worn, the movable contact component drives the displacement component 130 to displace, and the position of the light transmitting part 131 is changed while the displacement component 130 displaces, so that the range or the position of the outgoing light beam 142 received by the light beam receiver 150 can be changed along with the change of the position of the light transmitting part 131, and the displacement of the displacement component 130 is represented.

In some embodiments, as shown in fig. 4 and fig. 6, the light beam transmitter 140 includes a transmitting circuit board and a light source 141 disposed on the transmitting circuit board, the transmitting circuit board can drive the light source 141 to emit an outgoing light beam 142, and correspondingly, the light beam receiver 150 includes a receiving circuit board and a plurality of receiving probes 151 distributed on the receiving circuit board, and the plurality of receiving probes 151 are sequentially disposed along a displacement direction of the displacement assembly 130, so that a displacement amount of the displacement assembly 130 can be quantified according to a position of the receiving probe 151 capable of receiving the outgoing light beam 142, thereby detecting a displacement amount of the displacement assembly 130.

In some embodiments, when the plurality of receiving probes 151 are distributed on the receiving circuit board, the receiving probes may be distributed in various forms such as a straight line shape and a zigzag shape on the premise of being sequentially arranged along the displacement direction of the displacement assembly 130, taking 4 receiving probes 151 as an example: as shown in fig. 5 (a), the 4 receiving probes 151 are first sequentially arranged along the displacement direction x of the displacement assembly 130, and the 4 receiving probes 151 are sequentially connected to form a straight-line arrangement, so that the area occupied by the receiving circuit board can be reduced, which is beneficial to the miniaturization of the light beam receiver 150; as shown in fig. 5 (b), the 4 receiving probes 151 are sequentially arranged along the displacement direction x of the displacement assembly 130, and the 4 receiving probes 151 are sequentially arranged in a straight line at intervals, so that the influence of reflection and the like possibly received between two adjacent receiving probes 151 can be effectively reduced by the distance, and the accuracy of the displacement represented by each receiving probe 151 is improved; as shown in (c) of fig. 5, the 4 receiving probes 151 are first sequentially arranged along the displacement direction x of the displacement assembly 130, and the 4 receiving probes 151 are arranged in a zigzag shape, that is, in a 2-column staggered arrangement, thereby being capable of reducing mutual interference between the two receiving probes 151 that may occur when receiving light beams, in a staggered arrangement.

Of course, the more the receiving probes 151 are arranged along the displacement direction of the displacement assembly 130, the more the gear of the displacement amount of the displacement assembly 130 can be represented, and correspondingly, the more the detected contact wear amount is. For example, when the receiving probe 151 has only 4 and is uniformly distributed in the displacement direction, the contact wear amount may be divided into 4 steps, which are 100%, 75%, 50%, and 25%, respectively; when the receiving probes 151 have 100 and are uniformly distributed in the displacement direction, the contact wear amount may be divided into 100 steps, each step representing 1% wear amount.

For convenience of understanding, the following will describe a plurality of embodiments by taking 4 receiving probes 151 as an example, and it should be understood that in other embodiments, the number of the receiving probes 151 may be changed, and the application does not specifically limit the number.

In one embodiment, as shown in fig. 6 (a), when the light beam emitter 140 and the light beam receiver 150 are aligned, the field angle of the light beam emitter 140 may cover the plurality of receiving probes 151, that is, when there is no shielding therebetween, each receiving probe 151 can smoothly receive the outgoing light beam 142 emitted from the light source 141.

As shown in fig. 6, the 4 receiving probes 151 are sequentially provided with a first probe, a second probe, a third probe and a fourth probe along the displacement direction x of the displacement assembly 130, so as to correspondingly divide the contact wear amount into four steps, and as shown in fig. 3 and (a) of fig. 6, when the contact wear does not occur, the moving contact assembly is in contact with the fixed contact 120 and is closed, at this time, the displacement assembly 130 is at an initial position, and correspondingly, the orthographic projection of the light-transmitting portion 131 on the receiving circuit board covers all the receiving probes 151, that is, at this time, all the receiving probes 151 can receive the outgoing light beam 142, so that the 4 receiving probes 151 can receive the outgoing light beam 142 to represent that the contact wear amount is at the first step where the contact wear is not worn or slightly worn. When the contact is worn, the moving contact assembly drives the displacement assembly 130 to generate displacement, and correspondingly and synchronously drives the light-passing portion 131 to move, as shown in (b) in fig. 6, until the light-tight part of the displacement assembly 130 shields the first probe, at this time, the proportion of the outgoing light beam 142 passing through the light-passing portion 131 decreases, the first probe cannot receive the outgoing light beam 142, and the remaining 3 receiving probes 151 can still receive the outgoing light beam 142, so that the second to fourth probes can all receive the outgoing light beam 142 to represent that the contact wear amount is in the second gear with slight wear. Similarly, as the wear is increased, as shown in (c) of fig. 6, the first and second probes cannot receive the outgoing light beam 142, and the third to fourth probes can each receive the outgoing light beam 142 to represent that the contact wear amount is in the third gear with serious wear. Similarly, with the wear progressing, as shown in (d) of fig. 6, the first to third probes cannot receive the outgoing light beam 142, and the fourth probe can receive the outgoing light beam 142 to represent that the contact wear amount is in the fourth gear with serious wear, and when the fourth gear is reached, the contact wear amount is represented to reach the upper limit, so as to prompt the user to repair or replace the contact in time. That is, in the present embodiment, the amount of wear of the stylus is characterized by the number of times the receiving probe 151 cannot receive the outgoing beam 142.

In one embodiment, as shown in fig. 7, the 4 receiving probes 151 still include a first probe, a second probe, a third probe and a fourth probe arranged in sequence along the displacement direction x of the displacement assembly 130, which is different from the previous embodiment in that the present application characterizes the wear amount of the stylus by the number of the outgoing beams 142 that can be received by the receiving probes 151. Specifically, the method comprises the following steps: as shown in fig. 7 (a), only the first probe can receive the outgoing light beam 142, so that the contact wear can be represented by the outgoing light beam 142 received by only the first probe in the first gear where the contact wear is not worn or is slightly worn; as the wear is further increased, as shown in (b) of fig. 7, at this time, only the first probe and the second probe can receive the outgoing beam 142, and therefore, the contact wear amount can be represented by the fact that only the first probe and the second probe receive the outgoing beam 142 in the second gear where the wear is slight; as the wear is further increased, as shown in (c) of fig. 7, at this time, only the first to third probes can receive the outgoing light beam 142, so that the contact wear amount can be represented in the third gear where the wear is severe by the outgoing light beam 142 received by only the first, second, and third probes; as the wear is further increased, as shown in (d) in fig. 7, at this time, the 4 receiving probes 151 can receive the outgoing light beam 142, that is, the orthographic projection of the light-transmitting portion 131 on the receiving circuit board at this time completely covers the 4 receiving probes 151, so that the contact wear amount can be represented in the fourth gear with serious wear by the 4 receiving probes 151 being capable of receiving the outgoing light beam 142.

In one embodiment, as shown in fig. 8, the first probe, the second probe, the third probe and the fourth probe are sequentially arranged along the displacement direction x of the displacement assembly 130 by 4 receiving probes 151, and one of the differences from the foregoing embodiment is that the area of the light-transmitting portion 131 is reduced, and only one of the 4 receiving probes can receive the outgoing light beam 142. Referring to fig. 3 and fig. 8 (a), when the moving contact assembly is not worn, the moving contact assembly is in contact with the fixed contact 120 and is closed, and at this time, the displacement assembly 130 is in the initial position, that is, only the first probe can receive the outgoing light beam 142, so that the first probe can receive the outgoing light beam 142 to represent that the contact wear amount is in the first gear where the contact wear amount is not worn or the wear is slight. When the contact is worn, the movable contact assembly drives the displacement assembly 130 to displace, and the corresponding synchronous belt drives the light-passing portion 131 to move, as shown in (b) in fig. 8, until the light-passing portion 131 is aligned with the second probe, at this time, only the second probe can receive the outgoing light beam 142, so that the second gear where the contact wear amount is slight can be represented by that only the second probe can receive the outgoing light beam 142. Similarly, as the wear further increases, as shown in fig. 8 (c), the contact wear amount can be characterized by the fact that only the third probe can receive the outgoing light beam 142 in the third gear where the wear is severe. Similarly, as the wear is further increased, as shown in (d) of fig. 8, the fourth probe can receive the outgoing light beam 142 to represent that the contact wear amount is in the fourth gear with serious wear, and when the fourth probe reaches this gear, the contact wear reaches the upper limit, and the user is timely reminded to repair or replace the contact.

In some embodiments, the light beam emitter 140 may also be disposed on the displacement assembly 130, that is, as the contact wear increases, the movable contact assembly drives the displacement assembly 130 to displace and also drives the light beam emitter 140 to move, so that the contact wear can be detected by the following embodiments:

in one embodiment, as shown in fig. 9, the number of the receiving probes 151 is 4, the 4 receiving probes 151 are sequentially provided with a first probe, a second probe, a third probe and a fourth probe along the displacement direction x of the displacement assembly 130, the contact wear amount is divided into four steps correspondingly, the field angle of the light source 141 can only cover one receiving probe 151 at the same time, and as shown in (a) of fig. 3 and 9, when the moving contact assembly is not worn, the moving contact assembly is in contact with the fixed contact 120 and is closed, at this time, the displacement assembly 130 is in the initial position, that is, only the first probe can receive the outgoing light beam 142, so that it can be characterized that the contact wear amount is in the first step where the contact is not worn or is slightly worn by only the first probe can receive the outgoing light beam 142. When the contact is worn, the moving contact assembly drives the displacement assembly 130 to generate displacement, and correspondingly and synchronously drives the light beam emitter 140 to move, as shown in (b) in fig. 9, until the light source 141 is aligned with the second probe, at this time, only the second probe can receive the outgoing light beam 142, so that the contact wear amount represented by that only the second probe can receive the outgoing light beam 142 is in the second gear with slight wear. Similarly, as the wear further increases, as shown in fig. 9 (c), the contact wear amount can be characterized by the fact that only the third probe can receive the outgoing light beam 142 in the third gear where the wear is severe. Similarly, as the wear is further increased, as shown in (d) of fig. 9, the fourth probe can receive the outgoing light beam 142 to represent that the contact wear amount is in the fourth gear with serious wear, and when the fourth probe reaches this gear, the contact wear reaches the upper limit, and the user is timely reminded to repair or replace the contact.

In an embodiment, as shown in fig. 10, there are 4 receiving probes 151, and the 4 receiving probes 151 are sequentially provided with a first probe, a second probe, a third probe and a fourth probe along a displacement direction x of the displacement assembly 130, and the contact wear amount is divided into four steps correspondingly, and the field angle of the light source 141 can simultaneously cover the 4 receiving probes 151, and as shown in fig. 3 and fig. 10 (a), when there is no wear, the moving contact assembly contacts and closes with the fixed contact 120, and at this time, the displacement assembly 130 is at an initial position, that is, all the probes can receive the outgoing light beam 142, so that all the probes can receive the outgoing light beam 142 to represent that the contact wear amount is at the first step where there is no wear or slight wear. When the contact is worn, the movable contact assembly drives the displacement assembly 130 to displace, and correspondingly drives the light beam emitter 140 to move synchronously, as shown in (b) in fig. 10, along with the movement of the light beam reflector, the first probe is no longer in the field angle of the light source 141, that is, only the second to fourth probes can receive the outgoing light beam 142, so that the second to fourth probes can receive the outgoing light beam 142 to represent that the contact wear amount is in the second stage with slight wear. Similarly, as the wear is further increased, as shown in fig. 10 (c), the contact wear amount may be characterized in the third gear where the wear is severe by that only the third to fourth probes can receive the outgoing light beam 142. Similarly, as the wear further increases, as shown in (d) in fig. 10, the fourth probe can receive the outgoing light beam 142 to represent that the contact wear amount is in the fourth gear with serious wear, and when the fourth gear is reached, the contact wear reaches the upper limit, so as to prompt the user to repair or replace the contact in time.

In other embodiments, the light beam receiver 150 may be fixedly disposed on the displacement assembly 130, and the light beam emitter 140 may be fixedly disposed on the base 100.

Optionally, a light homogenizing sheet is further disposed on the light emitting side of the light beam emitter 140, so that the emitted light beam 142 can be emitted as approximately parallel light after passing through the light homogenizing sheet, and thus, the light beam can be homogenized, so that the light beam is uniformly distributed in the field range, and accurate reception of the plurality of receiving probes 151 is facilitated.

Optionally, a baffle is further arranged on one side of the light-passing portion 131 close to the movable contact assembly, so that residues or dust which may fall off when the contact is worn can be blocked by the baffle, and the problem that the influence of the baffle on the light-passing portion 131 and the accuracy of detection is reduced is avoided.

Optionally, the light beam emitter 140 is an infrared emitter, and the light beam receiver 150 is an infrared receiver, so that the matching degree of emitting and receiving can be effectively improved, and the detection accuracy is improved.

Optionally, as shown in fig. 11, the contact wear monitoring apparatus further includes a lever 170 rotatably disposed on the base 100, one end of the lever 170 is connected to the displacement assembly 130, the other end of the lever 170 corresponds to the optical detection assembly 160, and a power arm of the lever 170 is smaller than a resistance arm of the lever 170, so that the displacement of the displacement assembly 130 can be amplified by the lever 170, and the accuracy of detection by the optical detection assembly 160 can be improved conveniently. It should be understood that, in the actual connection, when the displacement assembly 130 is in translation, because the lever 170 is in rotation, a conversion transmission mechanism may be added between the displacement assembly 130 and the lever 170, thereby avoiding interference caused by different movement modes, and meanwhile, for convenience of detection, a conversion transmission mechanism and a translation member may also be arranged between the lever 170 and the optical detection assembly 160, thereby the optical detection assembly 160 may realize detection of the contact wear amount by measuring the translation amount of the translation member.

Optionally, as shown in fig. 1, the movable contact component includes a first elastic element 190, and a movable contact support 180 and a movable contact 110 respectively connected to two opposite ends of the first elastic element 190, the movable contact 110 is slidably disposed on the movable contact support 180, therefore, when the movable contact 110 is separated from the fixed contact 120, the first elastic element 190 can drive the movable contact 110 and the movable contact support 180 to abut against each other, when the movable contact support 180 is driven to drive the movable contact 110 to contact the fixed contact 120, the movable contact support 180 can continue to move so as to implement the over travel, specifically: as shown in fig. 2, the movable contact support 180 and the movable contact 110 are abutted against each other under the action of the first elastic member 190 to form an integral structure, and the integral structure is located at a switch-off position, when a switch needs to be switched on, the movable contact support 180 is driven by an external force to move towards the fixed contact 120, and before the movable contact 110 contacts the movable contact support 180, the movable contact 110 and the movable contact support 180 keep synchronous movement. When moving contact 110 and static contact 120 just contact, begin to carry out the overtravel, moving contact support 180 continues the syntropy motion promptly, because moving contact 110 is blockked by static contact 120, so, moving contact 110 and moving contact support 180 take place the relative slip, both original butt faces are separately, and make first elastic component 190 energy storage along with relative slip between them, after moving contact support 180 moves to the position of overtravel (the state shown in fig. 12, at this moment, distance t apart between two butt faces of moving contact 110 and moving contact support 180), the overtravel is ended, first elastic component 190 applys the effort to moving contact 110 this moment, this effort can make moving contact 110 and static contact 120 keep compressing tightly, thereby improve the reliability of contact. Meanwhile, along with the increase of the contact wear, the contact position between the movable contact 110 and the fixed contact 120 gradually deviates from the movable contact 110 toward the fixed contact 120, that is, the distance t between two abutting surfaces of the movable contact 110 and the movable contact support 180 gradually decreases, and the elastic energy stored by the first elastic member 190 during each overtravel also gradually decreases, so that the contact wear amount can be compensated by the overtravel, and the movable contact 110 can still be reliably contacted with the fixed contact 120 within a certain wear amount. As shown in fig. 13, when the contact wear reaches the limit, all the silver dots on the moving contact 110 and the static contact 120 are worn, and at this time, the moving contact 110 generates the maximum displacement corresponding to the driving displacement component 130, and the maximum displacement is the limit of the contact wear amount.

After each over-travel is finished, the displacement assembly 130 abuts against the movable contact 110, and thus, as shown in fig. 12 to 13, as the contact position between the movable contact 110 and the fixed contact 120 gradually deviates from the direction of the movable contact 110 toward the fixed contact 120, the movable contact 110 also gradually drives the displacement assembly 130 to generate a larger displacement. As shown in fig. 13, since the offset amount of the movable contact 110 is equal to the wear amount of the contact, the wear amount of the contact is more directly and accurately represented by the displacement amount of the displacement assembly 130.

In some embodiments, as shown in fig. 1, the movable contact support 180 has a sliding hole 181, and the movable contact 110 is mounted in the through hole, as shown in fig. 12, two opposite protruding rails are disposed on an inner wall of the through hole, and sliding grooves are correspondingly disposed on two opposite sides of the movable contact 110, respectively, and the sliding grooves and the protruding rails correspond to each other one by one, thereby achieving relative sliding between the movable contact 110 and the movable contact support 180, wherein one end of the first elastic element 190 abuts against the movable contact 110, and the other end abuts against one end wall of the sliding hole 181, and thus, under the action of the first elastic element 190, the movable contact 110 has a tendency of abutting against the other end wall of the sliding hole 181.

Optionally, as shown in fig. 12, the displacement component 130 includes a second elastic element 133 and a transmission component 132, wherein a sliding hole 181 is formed at an end of the movable contact support 180 close to the fixed contact 120, the transmission component 132 is slidably disposed in the sliding hole 181, and one end of the transmission component 132 far from the movable contact 110 extends outside the sliding hole 181, so as to facilitate detection of the optical detection component 160, a positioning protrusion 101 is disposed on the base below the transmission component 132, one end of the second elastic element 133 is sleeved on the positioning protrusion 101, the other end of the second elastic element 133 is sleeved on an end of the transmission component 132 close to the positioning protrusion 101, and opposite ends of the second elastic element 133 are respectively abutted against the transmission component 132 and the base 100, so that an upward acting force is provided to the transmission component 132 by the second elastic element 133, and the transmission component 132 is abutted against the movable contact 110 by the acting force, so that a displacement of the transmission component 132 can accurately represent a wear amount of the contact.

Of course, in other embodiments, the second elastic element may be located in the sliding hole 181, and opposite ends of the second elastic element are respectively connected to the transmission assembly 132 and the movable contact support 180, and the second elastic element 133 is configured to provide an acting force for the transmission assembly 132 to abut against the movable contact 110, thereby ensuring the abutment of the transmission assembly 132 against the movable contact 110, so that the displacement of the transmission assembly 132 can accurately represent the wear amount of the contact.

In another aspect of the embodiments of the present application, a contactor is provided, which includes any one of the contact wear monitoring devices described above. Through increase contact wearing and tearing monitoring devices in the contactor, can effectively monitor the wearing and tearing volume of contact to this convenience of customers in time masters the wearing and tearing condition of contact in the contactor, realizes early warning in advance.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The contact wear monitoring device is characterized by comprising a base (100), wherein a fixed contact (120) and a movable contact component which is driven to be in contact with or separated from the fixed contact (120) are arranged on the base (100), a displacement component (130) which is in driving fit with the movable contact component is further arranged on the base (100), an optical detection component (160) which is matched with the displacement component (130) is further arranged on the base (100), when the contact position of the movable contact component and the fixed contact (120) deviates, the movable contact component drives the displacement component (130) to displace, and the optical detection component (160) is used for detecting the displacement of the displacement component (130).

2. The stylus wear monitoring apparatus according to claim 1, wherein the optical detection assembly (160) comprises a light beam emitter (140) and a light beam receiver (150) located at opposite sides of the displacement assembly (130), the light beam receiver (150) is configured to receive an outgoing light beam (142) of the light beam emitter (140), and a light passing portion (131) configured to pass through the outgoing light beam (142) is disposed on the displacement assembly (130).

3. The stylus wear monitoring device according to claim 2, characterized in that the light beam receiver (150) comprises a receiving circuit board and a plurality of receiving probes (151) distributed on the receiving circuit board, the plurality of receiving probes (151) being arranged in sequence along a displacement direction of the displacement assembly (130).

4. A stylus wear monitoring device according to claim 2 or 3, wherein a light homogenizing sheet is further provided on the light exit side of the light beam emitter (140).

5. A contact wear monitoring device according to claim 2 or 3, characterized in that a baffle is also provided on the side of the light-passing portion (131) adjacent to the movable contact (110) assembly.

6. A stylus wear monitoring device according to claim 2 or 3, wherein the light beam emitter (140) is an infrared emitter and the light beam receiver (150) is an infrared receiver.

7. The contact wear monitoring device according to claim 1, further comprising a lever (170) rotatably disposed on the base (100), wherein one end of the lever (170) is connected to the displacement assembly (130), the other end of the lever (170) corresponds to the optical detection assembly (160), and a power arm of the lever (170) is smaller than a resistance arm of the lever (170).

8. The contact wear monitoring device according to claim 1, wherein the movable contact assembly includes a first elastic member (190), and a movable contact support (180) and a movable contact (110) respectively connected to opposite ends of the first elastic member (190), the movable contact (110) is slidably disposed on the movable contact support (180), the movable contact support (180) is driven to bring the movable contact (110) into contact with the fixed contact (120), and the movable contact support (180) continues to move to store energy in the first elastic member (190); the displacement assembly (130) is in driving fit with the movable contact (110).

9. The contact wear monitoring device according to claim 8, wherein the displacement assembly (130) includes a second elastic member (133) and a transmission assembly (132) slidably disposed on the movable contact support (180), the second elastic member (133) is connected to the transmission assembly (132), and the second elastic member (133) is configured to provide a force to the transmission assembly (132) to abut against the movable contact (110).

10. A contactor, characterized by comprising a contact wear monitoring device according to any of claims 1 to 9.

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