CN203339008U - Opening limit closing buffer structure of load switch - Google Patents

Abstract

The utility model discloses an opening, limiting and closing buffer structure of a load switch. It includes a crank arm, the middle part of the crank arm is connected to the operating shaft and can swing under the drive of the operating shaft, the front and rear ends of the crank arm are respectively provided with a roller, and the frame on one side of the operating shaft is respectively provided with a The position of the two rollers is relative to the limit device and the oil buffer, and the crank arm can make the two rollers selectively press against the limit device and the oil buffer under the drive of the operating shaft. After the above structure is adopted, when the load switch is closed, the operating mechanism of the load switch is prevented from overtravel due to the inertial force and the force of the closing spring, which will cause the crank arm part to collide with the load switch body and damage the composite switch body. When the load switch is opened, the oil buffer can be used to eliminate the rebound, thus realizing the closing limit and eliminating the opening rebound when the load switch is operated, and meeting the requirements of the mechanical characteristics of the load switch operation.

Description

Opening limit closing buffer structure of load switch

technical field

The utility model relates to an opening, limiting and closing buffer structure of a load switch, which belongs to the technical field of medium and high voltage power transmission and distribution.

Background technique

In the switchgear of the power distribution system, because the space of the operating mechanism of the load switch is very narrow, it is necessary to add a limit mechanism and a buffer mechanism to the body of the load switch drive. The existing limit mechanism and buffer mechanism are unreasonable. On the one hand The structure is complicated, the operation is inconvenient, and the flexibility is poor. On the other hand, due to the poor reliability of the operation, the load switch body is easy to be damaged.

Contents of the invention

The technical problem to be solved by the utility model is to provide an opening, limiting and closing buffer structure of the load switch which can improve the operation reliability and prevent the load switch from being damaged.

In order to solve the above-mentioned technical problems, the opening, limiting and closing buffer structure of the load switch of the present invention includes a crank arm, the middle part of which is connected to the operating shaft and can swing under the drive of the operating shaft. Two rollers are respectively provided at both ends, and the frame on one side of the operating shaft is respectively provided with a limit device and an oil buffer opposite to the position of the two rollers, and the crank arm can make the two rollers selectively The leaning against the limit device and the oil buffer.

The limiting device includes a spacer, the front of the spacer is opposite to the position of the roller at the front end of the crank arm, and a screw is connected to the back of the spacer, and the spacer is fixedly connected to the frame through the screw.

A buffer is provided between the spacer and the frame.

The buffer is a tendon washer.

After adopting the above-mentioned structure, because of the limit device and the oil buffer set opposite to the position of the two rollers, when the load switch is closed, it will be buffered by the buffer on the limit device to stop the mechanism and prevent the load switch from moving. Due to the inertial force and the large force of the closing spring, the operating mechanism of the operating mechanism causes overtravel, which causes the arm part to collide with the load switch body and damage the composite switch body. When the load switch is opened, the oil buffer can be adjusted according to the required stroke. The distance between the oil buffer and the crank arm, and the pressure of the oil buffer can also be adjusted, so that the rebound can be eliminated through the oil buffer, thus realizing the closing limit and Eliminate opening bounce and meet the requirements of the mechanical characteristics of the load switch operation.

Description of drawings

Fig. 1 is the structure diagram of closing state of the utility model;

Fig. 2 is a schematic diagram of the structure of the utility model in the opening state.

Detailed ways

The opening, limiting and closing buffer structure of the load switch of the present invention will be further described in detail in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the opening, limiting and closing buffer structure of the load switch of the present invention includes a crank arm 1, the middle part of which is connected to the operating shaft and can swing under the drive of the operating shaft. A roller 2 is respectively arranged at the front and rear ends of the handle, and the frame 3 on one side of the operating shaft is respectively provided with a limit device 8 and an oil buffer 4 opposite to the two rollers 2, and the crank arm 1 is driven by the operating shaft. The two rollers 2 are selectively pressed against the limit device 3 and the oil buffer 4. The position device 3 includes a cushion block 5. The front of the cushion block 5 is opposite to the position of the roller at the front end of the crank arm 1, and the back of the cushion block 5 A screw rod 6 is connected, and the cushion block 5 is fixedly connected on the frame 3 through the screw rod 6, and a buffer piece 7 is arranged between the block 5 and the frame 3, and the buffer piece 7 is a tendon washer.

It works as follows:

When the load switch is closed, the mechanism drives the hexagonal shaft to rotate together with the crank arm. After the crank arm rotates at a certain angle, it hits the pad, and the buffer member 7 buffers the mechanism to stop the movement and prevent the operating mechanism of the load switch from being due to inertia force and closing. The force of the spring is too large to cause overtravel, causing the arm part to collide with the body of the load switch and damage the body of the composite switch.

When the load switch is opened, the roller at the lower end of the crank arm 1 contacts the oil buffer. The oil buffer adopts a fully threaded surface to adjust the distance between the oil buffer and the crank arm according to the required stroke, and the pressure of the oil buffer It can also be adjusted, so that the oil buffer can be used to eliminate the rebound, thereby realizing the closing limit and eliminating the opening rebound when the load switch is operated, and meeting the requirements of the mechanical characteristics of the load switch operation.

Claims (4)

1. An opening, limiting and closing buffer structure of a load switch, comprising a crank arm (1), the middle part of which is connected to the operating shaft and can swing driven by the operating shaft, characterized in that: The front and rear ends of the crank arm (1) are respectively provided with a roller (2), and the frame (3) on one side of the operating shaft is respectively provided with a limit device (8) opposite to the position of the two rollers (2). ) and the oil buffer (4), the crank arm (1) can make the two rollers (2) selectively press against the limit device (3) and the oil buffer (4) under the drive of the operating shaft . 2. The opening, limiting and closing buffer structure of the load switch according to claim 1, characterized in that: the limit device (3) includes a pad (5), and the front of the pad (5) is in contact with the turning The rollers at the front end of the arm (1) are opposite to each other, and a screw (6) is connected to the back of the spacer (5), and the spacer (5) is fixedly connected to the frame (3) through the screw (6). 3. The opening, limiting and closing buffer structure of the load switch according to claim 2, characterized in that a buffer (7) is arranged between the pad (5) and the frame (3). 4. The opening, limiting and closing buffer structure of the load switch according to claim 3, characterized in that: the buffer (7) is a tendon washer.

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