CN104299861B - Spring-operation device and anti-stored energy mechanism excessively thereof - Google Patents

Abstract

The present invention relates to a spring operating device and its anti-over-storage mechanism. The anti-over-energy storage mechanism includes a lever whose rotation axis is parallel to the axis of the energy storage shaft of the corresponding spring operating device and a transmission for setting on the spring operating device. The rotation axis of the crank arm is parallel to the rotation axis of the lever. The rotation plate is provided with a pushing part for pushing the transmission crank arm. The power arm of the lever is provided with a device for being operated by a spring. The latch unit is pushed to make the lever rotate. The lever is connected with the rotating plate through the connecting rod, so that when the lever rotates, the connecting rod drives the rotating plate to rotate, so that the rotating plate pushes the transmission crank arm to disengage from the corresponding transmission cam. . The invention provides an over-storage-prevention mechanism capable of preventing a motor from being blocked and burned after energy storage of a closing spring is completed, and a spring operating device using the over-prevention energy-storage mechanism.

Description

Spring Operating Device and Its Over-Preventing Energy Storage Mechanism

technical field

The invention relates to a spring operating device and an over-storage preventing mechanism thereof.

Background technique

The spring operating device (that is, the spring operating mechanism) is the key to the performance of a circuit breaker. Existing spring operating devices such as "a high-power spring operating mechanism suitable for high-voltage and ultra-high-voltage circuit breakers" disclosed in Chinese patent CN202126942U, the spring operating mechanism includes an energy storage shaft provided with a latch unit, and the latch unit The sub-unit includes the energy storage detent and the joint connected with the corresponding closing spring through the chain. The energy storage shaft sprocket is fixed on the energy storage shaft, and the roller is arranged on the energy storage shaft sprocket. With the matching closing and tripping device, the energy storage shaft sprocket is connected to the power output end of the motor through a transmission mechanism. The transmission mechanism includes a first shaft and a second shaft parallel to the energy storage shaft, and the second shaft is connected to the motor through a chain. The drive connection of the power output end of the first shaft is fixed with the first shaft gear and the first shaft sprocket, the first shaft sprocket is connected with the energy storage shaft sprocket through a chain, and the second shaft is fixed with the first shaft sprocket The first shaft gear meshes with the transmission's second shaft gear. When in use, the power of the motor is transmitted to the second shaft, through the meshing transmission of the first and second shaft gears, the power is transmitted to the first shaft, and then the power is transmitted through the transmission of the first shaft sprocket and the energy storage shaft sprocket On the energy storage shaft, the energy storage shaft rotates with the detent unit, and the joint of the detent unit pulls the closing spring to store energy through the chain. After the detent unit rotates at a certain angle, the energy storage process ends, and the closing release device and The roller on the sprocket of the energy storage shaft cooperates in a limited position to prevent the energy storage shaft from continuing to rotate, thereby keeping the closing spring in the state of energy storage. The spring releases energy to drive the dynamic and static contacts of the circuit breaker to close. The problems existing in the energy storage device of this spring operating mechanism are: 1. Realize the power transmission between the motor and the energy storage shaft through the sprocket and gears. The transmission process of the sprockets and gears is bidirectional. In the process of spring energy storage, when the motor drives the closing spring to store energy, the closing spring will also give the rotor of the motor a reverse rotation force through the sprocket and gear, and the motor needs a lot of power to complete the energy storage spring. The energy storage process requires the use of high-power motors. The use of high-power motors increases the production cost of the product. At the same time, when the closing spring releases energy, the rotation of the energy storage shaft will also be transmitted to the motor through the chain and gears. The rotor drives the rotor to rotate, and the idling of the rotor not only increases energy consumption, but also reduces the service life of the motor; 2. In the spring operating mechanism, in order to ensure the safe and reliable operation of the equipment, it is usually equipped with an anti-over energy storage mechanism. The function of the anti-over energy storage mechanism is to prevent the motor from continuing to transmit power to the closing spring after the energy storage of the closing spring is completed. The closing spring transmits power. The problem with this anti-over energy storage mechanism is that if the electrical device fails, the motor will continue to run, and since the spring operating mechanism has stored energy in place at this time, the mechanical lock will take effect, which will cause the motor to stall and burn out. , component damage and other failures.

Contents of the invention

The object of the present invention is to provide an anti-over energy storage mechanism that can prevent the motor from being blocked and burned after the energy storage of the closing spring is completed; the object of the present invention is also to provide a spring operating device using the anti-over energy storage mechanism.

In order to solve the above problems, the technical solution of the anti-over energy storage mechanism in the present invention is:

The anti-over energy storage mechanism of the spring operating device includes a lever whose rotation axis is parallel to the axis of the energy storage shaft of the corresponding spring operating device and a rotation axis that is arranged beside the transmission arm of the spring operating device and the The rotating axis of the lever is parallel to the rotating plate, and the rotating plate is provided with a pushing part for pushing the transmission crank arm, and the power arm of the lever is provided with a pushing part for being pushed by the detent unit of the spring operating device to make the lever The force-receiving structure of the rotation, the lever is connected with the rotating plate through the connecting rod, so that when the lever rotates, the connecting rod drives the rotating plate to rotate, so that the rotating plate pushes the transmission crank arm to disengage from the corresponding transmission cam.

The stressed structure includes a stressed block and a first return spring arranged between the stressed block and the power arm.

The lever includes a horizontal bar extending in the left-right direction and a vertical bar fixed in the middle of the horizontal bar, the connecting rod is connected to the vertical bar, the force-bearing structure is arranged at the left end of the horizontal bar, A second return spring is connected to the right end of the cross bar.

The left end of the connecting rod is hingedly connected with the rotating plate, and the right end of the connecting rod is hingedly connected with the vertical rod.

The technical scheme of spring operating device among the present invention is:

The spring operating device includes a motor, an over-prevention energy storage mechanism, and an energy storage shaft connected to the motor through a transmission mechanism. The energy storage shaft is provided with a detent unit connected to the closing spring. The transmission mechanism includes The camshaft and the crankshaft are set, the camshaft is connected to the power output end of the motor, the crankshaft is connected to the energy storage shaft, at least one transmission crank is mounted on the crankshaft through a one-way bearing, and the camshaft is fixed on the camshaft. There is a transmission cam corresponding to the transmission crank arm one by one for pushing the corresponding transmission crank arm so that the transmission crank arm drives the crank shaft to rotate. The lever and the rotating plate whose rotation axis is parallel to the rotation axis of the lever arranged beside the transmission crank arm are provided with a pushing part for pushing the transmission crank arm on the rotation plate, and the power arm of the lever is provided with a Pushed by the detent unit to make the lever rotate, the lever is connected with the rotating plate through the connecting rod, so that when the lever rotates, the connecting rod drives the rotating plate to rotate, so that the rotating plate pushes the transmission crank arm and the corresponding transmission The cam disengages.

The stressed structure includes a stressed block and a first return spring arranged between the stressed block and the power arm.

The lever includes a horizontal bar extending in the left-right direction and a vertical bar fixed in the middle of the horizontal bar, the connecting rod is connected to the vertical bar, the force-bearing structure is arranged at the left end of the horizontal bar, A second return spring is connected to the right end of the cross bar.

The left end of the connecting rod is hingedly connected with the rotating plate, and the right end of the connecting rod is hingedly connected with the vertical rod.

There are at least two driving crank arms, and the driving cams are sequentially and continuously push-fitted with the corresponding driving crank arms respectively.

There are two transmission cranks and two transmission cams. The transmission cams have the same shape and are arranged symmetrically at an included angle of 180 degrees. It is provided that each transmission crank arm is located on the side of the crank shaft adjacent to the camshaft, and each transmission crank arm is connected with a third return spring.

The beneficial effect of the present invention is: when the energy storage of the closing spring is required, the motor drives the camshaft to rotate in the forward direction. Assuming that the direction for the spring to gradually store energy is positive, each transmission cam also rotates in the forward direction together with the camshaft. The cam push corresponds to the positive rotation of the transmission crank arm, and the transmission crank arm drives the crank arm shaft to rotate forward under the action of the one-way bearing, and the power of the crank arm shaft is transmitted to the closing spring through the energy storage shaft. The power transmission between the arms is one-way, that is, the transmission cam can push the transmission arm to rotate but the transmission arm cannot push the transmission cam to rotate, the power can only be transmitted from the transmission cam to the transmission arm and cannot be transmitted from the transmission arm to the transmission Cam, so the reaction force of the closing spring during the energy storage process will not be transmitted to the motor, which greatly reduces the power required by the motor, making the energy storage process safe and reliable; after the closing spring energy storage is completed, the detent unit Rotate until it pushes and matches with the force-bearing structure of the lever. Under the force of the closing spring, the detent unit pushes the lever to rotate, and the lever rotates with the rotating plate through the connecting rod. Even if the motor continues to run, since the transmission cam does not contact the transmission crank arm, the motor can only drive the transmission cam to idle, and the motor will not be burned due to stalling.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a spring operating device in the present invention, and it is also a diagram of the use state of an embodiment of an energy storage mechanism for preventing in the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic diagram of cooperation between the joint and the lever after the energy storage of the closing spring in Fig. 1 is completed;

Fig. 4 is a schematic diagram of cooperation between the camshaft and the transmission cam in Fig. 1 .

detailed description

The embodiment of the spring operating device is shown in Figures 1 to 4: it includes a motor, an over-preventing energy storage mechanism, and an energy storage shaft 9 connected to the motor through a transmission mechanism. The energy storage shaft is provided with a detent connected to the closing spring. unit, the detent unit includes an energy storage detent 12 and a joint 13 connected to the closing spring through a closing spring chain 10, wherein the matching relationship between the energy storage detent 12 and the joint 13 belongs to the prior art, and will not be described in detail here. . The transmission mechanism includes a camshaft 2 and a crankshaft 18 arranged parallel to the energy storage shaft 9, the camshaft 2 is in transmission connection with the power output end of the motor, and the crankshaft 18 is in transmission connection with the energy storage shaft 9 through a sprocket wheel and a chain mechanism. The sprocket and chain mechanism include a large sprocket fixed on the energy storage shaft, a small sprocket fixed on the crank shaft and a sprocket chain 8 that is connected between the large and lower sprockets in transmission, and the sprocket chain 8 on the crank shaft There are two transmission crank arms at intervals along the axial direction, the two transmission crank arms are respectively the first transmission crank arm 6-1 and the second transmission crank arm 6-2, and each transmission crank arm is assembled through its corresponding one-way bearing On the crank shaft 18, each driving crank is located on the side of the crank shaft 18 close to the camshaft 2, and each driving crank is connected with a third return spring 19, and each driving crank is provided with a push roller 5. On the side of the transmission crank arm close to the camshaft, there is a relief recess with the notch facing downward. Under the action of the third return spring 19, the push rollers on each transmission crank arm are always in close contact with the outer circumference of the corresponding transmission cam On the surface, two camshafts are fixed on the camshaft at intervals along the axial direction, respectively corresponding to each transmission crank arm, and are used to sequentially and continuously push the corresponding transmission crank arm when the crank shaft rotates, so that the transmission crank arm drives the crank arm. The shaft rotates the transmission cam. The outer peripheral surface contour curve of the transmission cam is designed according to the swing angle of the transmission crank arm. The two transmission cams are respectively the first transmission cam 1-1 and the second transmission cam 1-2. The two transmission cams are The shapes are the same and arranged symmetrically at an included angle of 180 degrees. The anti-over energy storage mechanism includes a lever 14 whose rotation axis is parallel to the axis of the energy storage shaft and a rotation plate 3 whose rotation axis is parallel to the rotation axis of the lever and is arranged on the transmission crank arm. The push part of the transmission crank arm, the lever includes a horizontal bar extending in the left and right direction and a vertical bar 15 fixed in the middle of the horizontal bar. The horizontal bar and the vertical bar 15 form a T-shaped structure, and the left end of the horizontal bar is the power arm of the lever. The power arm of the lever is provided with a force-bearing structure for being pushed by the joint 13 of the detent unit to make the lever rotate. Back-moving spring 17, the vertical bar of lever links to each other with rotating plate 3 by connecting rod 7 to drive rotating plate 3 to rotate by connecting rod 7 when rotating and then makes rotating plate 3 promote transmission arm and disengage from corresponding transmission cam, the left end of connecting rod and The rotating plate is hingedly connected, the right end of the connecting rod is hingedly connected with the vertical bar, and the second return spring 20 is connected with the right end of the cross bar. Item 4 in the figure indicates the rotating shaft used for the rotating assembly of the rotating plate; item 11 indicates the mounting plate.

The sequence and continuous pushing in the utility model is explained below. The sequence in "sequential and continuous pushing" means that the first transmission cam first pushes the first transmission crank arm to drive the crank shaft to rotate, and then the second transmission cam The cam pushes the second transmission crank arm to drive the crank shaft to rotate. The continuous in "sequential and continuous push" refers to the action when the second transmission cam starts to push the second transmission crank arm and the first transmission cam finishes pushing the first transmission cam. There is no time interval between the transmission crank arms. When the camshaft rotates, the power will be continuously transmitted to the crank shaft to make the crank shaft rotate continuously. When the closing spring needs to store energy, the power of the motor is transmitted to the camshaft through the transition shaft to drive the camshaft to rotate clockwise (visual angle in Figure 1). Under the action of the one-way bearing, the first transmission cam starts to push the first transmission cam The first transmission arm rotates clockwise, and because the second transmission cam also rotates clockwise, so the second transmission arm rotates counterclockwise under the action of the return spring to reset, and due to the effect of the one-way bearing, the reset of the second transmission arm The process will not affect the clockwise rotation of the crank arm shaft, the first transmission crank arm drives the crank arm shaft to rotate clockwise, the crank arm shaft drives the energy storage shaft to rotate clockwise through the sprocket chain, and the energy storage detent and joint pass through the closing spring The chain drives the closing spring to store energy; when the first transmission cam pushes the first transmission arm to the highest point, the second transmission arm returns to the lowest point, then the first transmission arm starts to rotate counterclockwise to reset, and the second transmission cam Start to push the second transmission crank arm to rotate clockwise. Driven by the second transmission crank arm, the crank shaft continuously drives the energy storage shaft to rotate clockwise, and the closing spring continues to store energy. During the energy storage process of the closing spring , the closing spring will give the arm shaft a counterclockwise rotation force, but because the transmission arm is limited by the transmission cam, the force of the closing spring will not be transmitted to the motor through the transmission mechanism, ensuring the stability of the energy storage process After the energy storage of the closing spring is completed, the energy storage detent rotates through the corresponding node at this time, and the closing spring will give a clockwise rotation force to the energy storage shaft. The joint contacts the force block, and the force block There is downward pressure. When the first return spring is compressed to the maximum, the force block drives the horizontal bar and the vertical bar of the lever to rotate counterclockwise, and the vertical bar drives the rotating plate to rotate counterclockwise through the connecting rod, and the rotating plate drives the crank arm Jack up to disengage the transmission arm from the corresponding transmission cam, and then limit the position of the energy storage latch through the closing and tripping device. The closing and tripping device belongs to the prior art, and its specific structure will not be described in detail here. Now even if the motor continues to run, because the transmission cam is separated from the transmission crank arm, the motor can only drive the transmission cam to idle, and the motor will not be burned due to stalling. The rotation of the energy storage shaft is restricted by the closing release device, so that the closing spring remains in the energy storage state. When the circuit breaker needs to be closed, the closing release device releases the limit on the energy storage shaft, and the closing spring drives the crutch The arm shaft rotates counterclockwise, and due to the effect of the one-way bearing, the first and second transmission crank arms are not affected by the counterclockwise rotation of the crank shaft, and continue to maintain their original positions.

The transmission cranks are all located on the side of the crank shaft close to the camshaft, and a return spring is arranged between each transmission crank and the crank shaft. After the first transmission cam pushes the first transmission crank to the highest point, , the second transmission cam starts to push the second transmission arm to rotate counterclockwise, and the return spring brings the first transmission arm close to the first transmission cam and rotates clockwise around the axis of the arm to reset. Due to the effect of the one-way bearing, The reset action of the first transmission crank arm will not affect the counterclockwise rotation of the crank arm shaft. The use of the third return spring ensures that the transmission crank arm is always close to the corresponding transmission cam, ensuring the reliability of the cam and the crank arm transmission process. , and at the same time, the movable angle of each transmission crank arm is not particularly large, and there is no need to rotate the whole circle. It only needs to reciprocate on the side of the crank shaft close to the camshaft, and the other side of the crank shaft is preset. The installation space is reserved, and the occupied space of the transmission mechanism is reduced. There are two driving arms and two driving cams. The two driving cams have the same shape and are arranged symmetrically at an angle of 180 degrees. When the first driving cam pushes the first driving arm to the highest point, the second driving arm is at the lowest point. , and then the second transmission cam pushes the second transmission crank arm to move, and only two transmission cams can realize the continuous energy storage of the closing spring, which has high working efficiency and low cost, and can also meet the energy storage time requirement.

In other embodiments of the spring operating device: the number of the transmission crank arm and the transmission cam can also be three, four or more, and the number of the transmission crank arm and the transmission cam is three as an example. Note that the three transmission cranks can be evenly arranged around the circumference of the crank shaft. At this time, the third return spring may not be provided. The three transmission cranks are installed on the crank shaft through the same bushing, and the bushing and the crank shaft A one-way bearing is arranged between them, and three transmission cams are evenly arranged around the circumference of the camshaft. When the first transmission cam pushes the first transmission crank arm to the highest position, the second transmission cam starts to contact with the second transmission crank arm. Contact and push the second transmission arm to rotate clockwise, at this time the first transmission cam is separated from the first transmission arm; when the second transmission cam pushes the second transmission arm to the highest position, the third transmission cam starts to contact with the first transmission arm The third transmission arm contacts and pushes the third transmission arm to rotate clockwise. At this time, the second transmission cam is separated from the second transmission arm. When the third transmission cam pushes the third transmission arm to the highest position, the first When the first transmission arm rotates to the initial position, the first transmission cam starts to contact the first transmission arm and pushes the first transmission arm to rotate clockwise, and so on; when the transmission ratio between the large and small sprockets is large enough, There can also be only one transmission arm. At this time, the transmission cam can only push one transmission arm to rotate to realize the energy storage of the closing spring; , the closing spring stores energy; the detent unit can also push and cooperate with the force-bearing block through the energy-stored detent to realize the push lever rotation; the first return spring can also be omitted, and the force-bearing block can be directly fixed on the lever at this time or the load-bearing block is not provided, and the detent unit directly pushes the lever to rotate. At this time, the load-bearing structure is formed by the upper surface of the left end of the lever; the second return spring can also be omitted, and the lever can be manually reset at this time; Vertical bar also can not be established, and now the right end of connecting rod can be hinged on the left end or the right end of lever;

The embodiment of the over-prevention energy storage mechanism is shown in Figures 1-3: the specific structure of the over-prevention energy storage mechanism is the same as that of the over-prevention energy storage mechanism described in the embodiments of the above-mentioned spring operating devices, and will not be described in detail here.

Claims (9)

1. The anti-over energy storage mechanism of the spring operating device is characterized in that: it includes a lever whose axis of rotation is parallel to the axis of the energy storage shaft of the corresponding spring operating device and a rotation lever arranged beside the transmission crank arm of the spring operating device. A rotating plate whose axis is parallel to the rotating axis of the lever. The rotating plate is provided with a pushing part for pushing the driving crank arm. The force-bearing structure that pushes the lever to rotate, the lever is connected to the rotating plate through the connecting rod so that when the lever rotates, the connecting rod drives the rotating plate to rotate so that the rotating plate pushes the transmission crank arm to disengage from the corresponding transmission cam. 2. The anti-over energy storage mechanism according to claim 1, characterized in that: the force receiving structure comprises a force receiving block and a first return spring disposed between the force receiving block and the power arm. 3. The anti-over energy storage mechanism according to claim 1 or 2, characterized in that: the lever includes a horizontal bar extending in the left and right directions and a vertical bar fixed in the middle of the horizontal bar, and the connecting rod is connected to On the vertical bar, the stressed structure is arranged at the left end of the horizontal bar, and the right end of the horizontal bar is connected with a second return spring. 4. The anti-over energy storage mechanism according to claim 3, characterized in that: the left end of the connecting rod is hingedly connected to the rotating plate, and the right end of the connecting rod is hingedly connected to the vertical rod. 5. The spring operating device includes a motor, an over-preventing energy storage mechanism, and an energy storage shaft connected to the motor through a transmission mechanism. The energy storage shaft is provided with a detent unit connected to the closing spring. It is characterized in that: the transmission mechanism It includes a camshaft and a crankshaft arranged parallel to the energy storage shaft, the camshaft is connected to the power output end of the motor, the crankshaft is connected to the energy storage shaft, and at least one transmission crank is mounted on the crankshaft through a one-way bearing. arm, and the camshaft is fixed with a transmission cam corresponding to the transmission crank arm one by one, which is used to push the corresponding transmission crank arm so that the transmission crank arm drives the crank arm shaft to rotate. The axis of the shaft is parallel to the lever and the rotating plate arranged on the side of the driving arm is parallel to the rotating axis of the lever. The rotating plate is provided with a pushing part for pushing the driving arm. The power arm is provided with a force-receiving structure for being pushed by the detent unit to rotate the lever, and the lever is connected to the rotating plate through a connecting rod so that when the lever rotates, the connecting rod drives the rotating plate to rotate and then pushes the rotating plate The transmission crank arm is disengaged from the corresponding transmission cam. 6 . The spring operating device according to claim 5 , wherein the force-receiving structure comprises a force-receiving block and a first return spring disposed between the force-receiving block and the power arm. 7. The spring operating device according to claim 5, wherein the lever comprises a horizontal bar extending in the left and right directions and a vertical bar fixed in the middle of the horizontal bar, and the connecting rod is connected to the On the vertical bar, the stressed structure is arranged at the left end of the horizontal bar, and the right end of the horizontal bar is connected with a second return spring. 8. The spring operating device according to claim 7, characterized in that: the left end of the connecting rod is hingedly connected to the rotating plate, and the right end of the connecting rod is hingedly connected to the vertical rod. 9. The spring operating device according to any one of claims 5-8, characterized in that: the transmission cams respectively cooperate with the corresponding transmission crank arms sequentially and continuously, and there are two transmission crank arms and two transmission cams, two The two transmission cams are respectively the first transmission cam and the second transmission cam, and the two transmission cams are respectively the first transmission cam and the second transmission cam. Each transmission cam has the same shape and is symmetrically arranged at an angle of 180 degrees. The transmission cranks are arranged at intervals along the axial direction of the crank shaft, and the transmission cams are arranged at intervals along the axial direction of the camshaft. Each transmission crank is located on the side of the crank shaft adjacent to the camshaft. Both are connected with a third return spring, and the sequence in the sequential and continuous pushing means that the first transmission cam first pushes the first transmission crank arm to drive the crank shaft to rotate, and then the second transmission cam pushes the second transmission crank arm to drive The crank shaft rotates, and the continuous in sequential and continuous pushing refers to that there is no time interval between the action of the second transmission cam starting to push the second transmission crank and the end of the first transmission cam pushing the first transmission crank.