CN215342410U

CN215342410U - Contact system of isolating switch

Info

Publication number: CN215342410U
Application number: CN202121190767.7U
Authority: CN
Inventors: 马玉明; 马金泉; 柳林强; 夏艳庆; 何鹄翔
Original assignee: Beijing Bevone Electric Co ltd
Current assignee: Beijing Bevone Electric Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-28
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a contact system of an isolating switch, which comprises a moving contact, a positioning shaft, a contact support, a fixed contact, a spring, a base and an upper cover, wherein the moving contact is fixed on the positioning shaft; the base is provided with a spring positioning column, a spring positioning hole is formed in the spring positioning column, the bottom end of the spring is sleeved on the periphery of the spring positioning column and is fixedly connected with the base, the moving contact is fixed on the contact supporting piece, and the top end of the spring is abutted against the lower surface of the moving contact; the top end of the positioning shaft is fixedly connected with the moving contact, and the bottom end of the positioning shaft correspondingly extends into the spring; the upper cover is correspondingly buckled above the base, two static contacts which are parallel to the moving contact and are positioned above the moving contact are clamped and fixed between the upper cover and the base, and the moving contact is positioned below the static contacts. The advantages are that: the spring is positioned by the positioning shaft pair, so that the spring can keep a correct position in the opening and closing processes of the isolating switch, the matching between the moving contact and the static contact is more stable and reliable, and the processing and the assembly are easy.

Description

Contact system of isolating switch

Technical Field

The utility model relates to the technical field of low-voltage electric appliances, in particular to a contact system of an isolating switch.

Background

The isolating switch contact structure generally comprises a moving contact, a fixed contact and a spring, the isolating switch can cause the moving contact to generate huge vibration in the process of opening and closing, the existing contact system only designs a positioning structure of the spring on a base or a contact support, the moving contact is easy to fall in the process of assembling the moving contact, after the assembly is completed, the isolating switch can deform after multiple times of opening and closing operations, the contact pressure is reduced, the contact resistance of the moving contact is increased due to the reduction of the contact pressure, overheating and burnout are caused, the temperature rise of the isolating switch is influenced, and the isolating switch can not work normally.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a contact system for a disconnector, whereby the aforementioned problems in the prior art are solved.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a contact system of an isolating switch comprises a moving contact, a positioning shaft, a contact support, a fixed contact, a spring, a base and an upper cover; the base is provided with a spring positioning column which extends vertically and upwards, the spring positioning column is provided with a spring positioning hole which is coaxial with the spring positioning column, the bottom end of the spring is sleeved on the periphery of the spring positioning column and is fixedly connected with the base, the moving contact is fixed on the contact support and extends horizontally, and the top end of the spring is abutted against the lower surface of the moving contact; the top end of the positioning shaft is fixedly connected with the moving contact, and the bottom end of the positioning shaft correspondingly extends into the spring; the upper cover is correspondingly buckled above the base, two static contacts which are parallel to the moving contact and are positioned above the moving contact are clamped and fixed between the upper cover and the base, the distance between the two static contacts is greater than the length of the moving contact, and the moving contact is positioned below the static contacts; when the spring is in a normal extension state, the movable contacts at the two ends of the movable contact are respectively contacted with the static contacts on the two static contacts, and when the spring is in a compression state, the movable contacts at the two ends of the movable contact are respectively separated from the static contacts on the two static contacts.

Preferably, the positioning shaft is a stepped shaft, the diameters of the two ends of the positioning shaft are the same, and a stop block with the diameter larger than the diameters of the two ends of the positioning shaft is arranged in the middle of the positioning shaft; the diameters of the two ends of the positioning shaft are smaller than the diameter of the spring positioning hole, and the diameter of the stop block is larger than the diameter of the spring positioning hole.

Preferably, the middle part of the moving contact is provided with a mounting hole penetrating through the upper side and the lower side of the moving contact, and the top end of the positioning shaft correspondingly extends into the mounting space, so that the positioning shaft is fixedly connected with the moving contact.

Preferably, one end of the static contact is clamped and fixed between the upper cover and the base, the other end of the static contact horizontally extends towards the direction close to the moving contact, and the static contact is arranged on the lower surface of the extending end of the static contact; the upper surfaces of two ends of the moving contact are respectively provided with a moving contact, and the corresponding moving contact and the fixed contact are contacted or separated to realize switching on or switching off.

The utility model has the beneficial effects that: 1. the spring is positioned by the positioning shaft pair, so that the spring can keep a correct position in the opening and closing processes of the isolating switch, the matching between the moving contact and the static contact is more stable and reliable, and the processing and the assembly are easy. 2. The distance of the moving contact and the fixed contact is limited through the positioning shaft, the moving contact and the fixed contact are prevented from being separated too far, and the contact agility of the moving contact and the fixed contact in the switching-on process is reduced.

Drawings

Fig. 1 is a schematic diagram of a closing state of an isolating switch in the embodiment of the utility model;

FIG. 2 is a schematic diagram illustrating the state of the disconnecting switch according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a base in an embodiment of the utility model;

fig. 4 is a schematic structural diagram of a movable contact in an embodiment of the utility model;

FIG. 5 is a schematic view of a positioning shaft according to an embodiment of the present invention;

figure 6 is a schematic view of the structure of a contact support according to an embodiment of the utility model;

fig. 7 is a diagram illustrating the result of a stationary contact according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of an upper cover in an embodiment of the present invention;

in the figure: 1. a base; 2. a moving contact; 3. positioning the shaft; 4. a contact support; 5. a spring; 6. static contact; 7. an upper cover; 8. a stopper; 9. a spring positioning post; 10. a spring positioning hole; 11. mounting holes; 12. a movable contact; 13. and a stationary contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 8, in the present embodiment, a contact system of an isolating switch is provided, which includes a moving contact 2, a positioning shaft 3, a contact support 4, a stationary contact 6, a spring 5, a base 1, and an upper cover 7; a spring positioning column 9 extending vertically upwards is arranged on the base 1, a spring positioning hole 10 coaxial with the spring positioning column is arranged on the spring positioning column 9, the bottom end of the spring 5 is sleeved on the periphery of the spring positioning column 9 and is fixedly connected with the base 1, the moving contact 2 is fixed on the contact support 4 and extends horizontally, and the top end of the spring 5 abuts against the lower surface of the moving contact 2; the top end of the positioning shaft 3 is fixedly connected with the moving contact 2, and the bottom end of the positioning shaft 3 correspondingly extends into the spring 5; the upper cover 7 is correspondingly buckled above the base 1, two static contacts 6 which are parallel to the moving contact 2 and are positioned above the moving contact 2 are clamped and fixed between the upper cover 7 and the base 1, the distance between the two static contacts 6 is greater than the length of the moving contact 2, and the moving contact 2 is positioned below the static contacts 6; when the spring 5 is in a normal extension state, the moving contacts 12 at the two ends of the moving contact 2 are respectively contacted with the fixed contacts 13 on the two fixed contacts 6, and when the spring 5 is in a compression state, the moving contacts 12 at the two ends of the moving contact 2 are respectively separated from the fixed contacts 13 on the two fixed contacts 6.

In this embodiment, as shown in fig. 6, the contact support 4 is H-shaped, the contact support 4 is vertically disposed between the base 1 and the upper cover 7 along a direction parallel to the axis of the spring positioning post 9, the movable contact 2 is horizontally disposed on the contact support 4 along a direction perpendicular to the axis of the spring positioning post 9, two ends of the moving contact 2 extend out of two opposite sides of the head support, the moving contact 2 is positioned in the middle of the contact support 4, the upper end of the contact support 4 passes through a gap between two static contacts 6 and extends upwards, the lower end of the contact support 4 extends downwards to the outer peripheral side of the spring 5, and the lower end of the contact support member 4 is away from the upper surface of the base 1 by a certain distance, so that when the contact support member 4 is pressed downwards, the moving contact 2 can be linked to press the spring 5 to compress downwards, and the opening of the isolating switch is realized.

In this embodiment, as shown in fig. 5, the positioning shaft 3 is a stepped shaft, the diameters of the two ends of the positioning shaft 3 are the same, and the middle part of the positioning shaft is provided with a stopper 8 with a diameter larger than the diameters of the two ends; the diameters of the two ends of the positioning shaft 3 are smaller than the diameter of the spring positioning hole 10, and the diameter of the stop dog 8 is larger than the diameter of the spring positioning hole 10.

The positioning shaft 3 can provide a guiding effect for the spring 5, so that the spring 5 is ensured to be vertical in the compression or extension process, and the phenomenon that the inclination of the spring in the brake opening or closing process of the isolating switch influences the brake opening or closing effect is avoided. The stop block 8 arranged on the positioning shaft 3 can limit the length of the positioning shaft 3 extending into the spring positioning hole 10 to a certain extent, and the influence of overlarge distance between the movable contact 12 of the movable contact 2 and the static contact 13 of the static contact 6 on the next switching-on effect is avoided.

In this embodiment, as shown in fig. 4, a mounting hole 11 penetrating through the upper and lower sides of the moving contact 2 is formed in the middle of the moving contact 2, and the top end of the positioning shaft 3 correspondingly extends into the mounting space, so that the positioning shaft 3 is fixedly connected with the moving contact 2.

In this embodiment, as shown in fig. 7, one end of the static contact 6 is clamped and fixed between the upper cover 7 and the base 1, the other end of the static contact 6 extends horizontally in a direction close to the moving contact 2, and the static contact 13 is disposed on a lower surface of the extending end of the static contact 6; the upper surfaces of two ends of the moving contact 2 are respectively provided with the moving contact 2, and the corresponding moving contact 12 is contacted with or separated from the fixed contact 13 so as to realize switching-on or switching-off.

In this embodiment, referring to fig. 1 and 2, when the spring 5 is in a normal extension state, the spring 5 supports the moving contact 2 and the contact support 4, at this time, the moving contacts 12 arranged at two ends of the moving contact 2 are respectively contacted with the stationary contacts 13 arranged on the two stationary contacts 6, and the contact switch is in a closing state; when the contact support 4 is pressed to move downwards, the moving contact 2 moves downwards in a linkage manner to compress the spring 5 to move downwards, the moving contact 12 on the moving contact 2 is separated from the static contact 13 on the static contact 6, the spring 5 compresses downwards, and the lower end of the positioning shaft 3 gradually extends into the spring positioning hole 10 until the stop block 8 is contacted with the spring positioning column 9, so that the opening of the isolating switch is realized; the next closing can be realized by the elastic force of the spring 5 only by removing the pressure on the contact support 4.

In this embodiment, the number of the spring positioning columns 9 in the base 1 can be set according to actual conditions, and the number of the opposite contact supports 4 is the same as that of the spring positioning columns, and the spring positioning columns correspond to the contact supports one by one.

By adopting the technical scheme disclosed by the utility model, the following beneficial effects are obtained:

the utility model provides a contact system of an isolating switch, which is characterized in that a spring is positioned by a positioning shaft pair, so that the spring can keep a correct position in the switching-off and switching-on processes of the isolating switch, the matching between a movable contact and a fixed contact is more stable and reliable, and the contact system is easy to process and assemble. The distance of the moving contact and the fixed contact is limited through the positioning shaft, the moving contact and the fixed contact are prevented from being separated too far, and the contact agility of the moving contact and the fixed contact in the switching-on process is reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.

Claims

1. A contact system for a disconnector, characterized in that: the device comprises a moving contact, a positioning shaft, a contact supporting piece, a fixed contact, a spring, a base and an upper cover; the base is provided with a spring positioning column which extends vertically and upwards, the spring positioning column is provided with a spring positioning hole which is coaxial with the spring positioning column, the bottom end of the spring is sleeved on the periphery of the spring positioning column and is fixedly connected with the base, the moving contact is fixed on the contact support and extends horizontally, and the top end of the spring is abutted against the lower surface of the moving contact; the top end of the positioning shaft is fixedly connected with the moving contact, and the bottom end of the positioning shaft correspondingly extends into the spring; the upper cover is correspondingly buckled above the base, two static contacts which are parallel to the moving contact and are positioned above the moving contact are clamped and fixed between the upper cover and the base, the distance between the two static contacts is greater than the length of the moving contact, and the moving contact is positioned below the static contacts; when the spring is in a normal extension state, the movable contacts at the two ends of the movable contact are respectively contacted with the static contacts on the two static contacts, and when the spring is in a compression state, the movable contacts at the two ends of the movable contact are respectively separated from the static contacts on the two static contacts.

2. The contact system of a disconnector according to claim 1, characterized in that: the positioning shaft is a stepped shaft, the diameters of the two ends of the positioning shaft are the same, and a stop block with the diameter larger than the diameters of the two ends of the positioning shaft is arranged in the middle of the positioning shaft; the diameters of the two ends of the positioning shaft are smaller than the diameter of the spring positioning hole, and the diameter of the stop block is larger than the diameter of the spring positioning hole.

3. The contact system of a disconnector according to claim 2, characterized in that: the middle part of the moving contact is provided with a mounting hole penetrating through the upper side and the lower side of the moving contact, and the top end of the positioning shaft correspondingly extends into the mounting space to fixedly connect the positioning shaft with the moving contact.

4. A contact system of a disconnector according to claim 3, characterized in that: one end of the static contact is clamped and fixed between the upper cover and the base, the other end of the static contact horizontally extends towards the direction close to the moving contact, and the static contact is arranged on the lower surface of the extending end of the static contact; the upper surfaces of two ends of the moving contact are respectively provided with a moving contact, and the corresponding moving contact and the fixed contact are contacted or separated to realize switching on or switching off.