JPS58184233A - Motor driven spring operating mechanism for circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a winding (storage) portion of an electric spring operating mechanism of a circuit breaker.

FIGS. 1 to 8FA show a conventional electric spring operating mechanism, and the structure and operation thereof will first be explained based on these drawings. In other words, the main shaft (2) is the mechanism frame (1)
It is supported by the bearing (1&) attached to K and the bearing (82a) attached to the mechanism frame @, and is operated by the backstop one-way clutch (one-way rotation clutch) (lb) of the main shaft (2). Only rotation in the direction is allowed. The above-mentioned main shaft (2) K is attached so that the mold wheel (toward), the input cam (8) and the crank arm (incorporated) rotate together. And model car (to) K
The roller (to) that comes into contact with the energy accumulating cam attached to the energy accumulating arm c (1cIl is loosely connected and this energy accumulating arm (to) CIIK is attached to the motor shaft) which freely rotates concentrically is the roller attached. It is attached with a pin, and the pawl 2 is connected by a pawl attachment pin (to), and the pawl is always pressed so as to come into contact with the pawl wheel mK by a torsion spring 4 provided on the spring shaft. On the other hand, the spring shaft tIDK is connected to a tension spring for rotating the energy storage arm (to) in the direction of the arrow as shown in Fig. 8, and the other end of this spring is attached to the frame (1) K. A roller (4) is attached to the closing cam (3) with a roller shaft (5), and the roller (4) is connected to the closing latch (6) after the energy storage is completed. Close the closing latch (6
] is supported so that it can be rotated by a latch shaft (7), and is biased in one direction by a tension spring (9) connected to a spring mounting pin Ql) attached to the frame +1) side, and the stopper pin ( It maintains its position by coming into contact with 8). The operating lever (to) has arms that branch in three directions, and is rotatably supported at the center by a shaft (a).
One arm VC contacts the input cam (3), and a roller (to) for rotating this operating lever (to) in the direction of arrow (0) shown in FIG. 1 is attached with a roller shaft Qll. The paternal arm KH is attached with a roller shaft (b), which engages with four release latches for holding the above-mentioned rotational position. Furthermore, an operating rod 4 is connected to one arm with a connecting pin 4. Although not shown, the operating rod (2) is connected to a contact point for opening and closing an electric circuit. The 4th release latch is rotatably attached to the latch shaft (2), and is biased by the tension spring C13 attached to the spring-mounted pin C14K, so that it comes into contact with the roller (to). There is. - is the 4 release spring of the above operating lever (to), one end of which is attached to the spring mounting pin -, and the other end is to the operating lever (to).
It is attached to the spring-mounted bin -, and the operating lever (to) is moved in the direction opposite to the direction of the arrow (0) shown in Fig. 1, i.e. in the direction of the arrow shown in Fig. 2, centering on the shaft (1). It is biased to rotate, and the final position is maintained by a stopper bin. Note that the 4 release springs and stopper pins are installed at different positions 11 than shown in the figure.
It is common to maintain the final position, in other words, the 4-release completion position, in combination with a damper device or the like.

The crank arm shown in Figures 4 to 6 is attached to the closing spring (to the closing spring) via a spring fitting (E) and a crank pin (E), and the other end of the closing spring (to) is attached to the spring fitting. (2
), the bottle holder, and the bearing stand are directly connected to the main body frame.

The conventional mechanism has a structure like upper ε, and the closing spring (2)
The accumulation of energy starts from the states shown in FIGS. 2 and 8. At this time, the states of the other components remain as shown in FIGS. 5 and 111 and 8. At this point, a command is first input to the electric motor, and the energy storage cam attached to the motor shaft 11 rotates. This energy storage cam ■ is an eccentric cam, and the energy storage arm swings at an angle of θ1 shown in Fig. 7, and the model car (
) is rotated in the direction of the arrow shown in Figure 8 ( ).

Therefore, as shown in FIG. 6, the crank arm (c) also rotates in the direction of the arrow in the middle, extending the closing spring (2) and storing spring force. When the crankbin (4) passes the top dead center, the crank arm (c), main shaft (2), charging cam (3), and die wheel (to) work together due to the spring force and begin to overrun. The roller (4) provided with the cam (8)K comes into contact with the closing latch (6) and stops. This overrun operation activates a limit switch (not shown) to issue a stop command to the motor. However, the motor continues to rotate and stop due to inertia, but after the first overrun, the mold wheel (to) has no teeth, so it cannot move due to the inertia of the motor and rotate the mold wheel. do not have. This state is shown in Figs. 1, 4, and 7.
This is the so-called state of energy storage completion.

Next, when the closing latch (6) shown in FIG. 1 is operated in the direction of the arrow ^) using, for example, an electromagnet, the closing cam [8] is rotated in the direction of the arrow CB) by the force of the closing spring.

At this time, the closing cam (II) and the roller (to) attached to the operating lever (to) come into contact and move the operating lever (to) by the arrow (
0) and move the operating rod in the direction of the arrow (in the middle) to close the electrical contact (not shown). At this time, the 1 release latch 4 and the roller α@ engage and hold this state, and the 4 release spring is extended to accumulate the 4 release force. Next, as shown in FIG. 2, when the four release latches (b) are operated in the direction of the arrow @), the state shown in FIG. 8 is achieved by the force of the four release springs. In other words, this is a cutoff state, and the above operation will be repeated from now on.

Now, after the energy storage is completed (Fig. 4), if the energy is released (input), the position of the crankbin (2) will change due to the inertia of the moving bodies (main shaft, die wheel, input cam, etc.) as shown in Fig. 6. After passing the top dead center, it further rotates in the direction of the arrow.

At this time, the closing spring @ is once compressed and then stretched again as it passes the top dead center, and when this spring force and the inertial force of the moving body are balanced, it moves in the opposite direction, that is, arrow g)
Attempt to rotate the moving object in the direction of . But at this time,
The one-way clutch (lb) for pack stop attached to frame +1) shown in Fig. 6 meshes with the main shaft (2), and the one-way clutch (lb) shown in FIG. Rotate in the direction θ1
Stop at the angle of .

The one-way clutch (lb) rotates in one direction by the same amount as the frictional resistance of the bearing, and locks the rotation in the opposite direction with a slight backlash.

If we look at the position of θ above microscopically, it is not always constant;
The position of θ1 changes depending on the frequency of use, an increase/decrease in frictional resistance due to changes in the environment, etc. For this reason, when stopping at the complete loading position @ shown in Fig. 8, the tip of the pawl (■) may collide with the tip of the tooth of the mold wheel (to), and the impact force is particularly large when rotating in the direction of arrow g). However, there was a drawback that part of the claw and mold Kurumaso were damaged.

The present invention provides the one-way club 1. This is an attempt to eliminate the above-mentioned drawbacks of the conventional method by allowing the claw to move slightly beyond the backlash amount of the Tsuchi.
DESCRIPTION OF THE PREFERRED EMBODIMENTS An explanation will be given based on an embodiment of the present invention shown in the drawings.

FIG. 9 is an enlarged view of the claw portion of the conventional energy storage mechanism shown in FIG. 8, and the difference from the conventional one is that the claw (b) has a groove (84 m) in its abdomen. When accumulating energy, when the accumulating arm (7) (to) moves in the direction of arrow C [,), the above-mentioned bow groove! is (84m) come into contact and transmit the force that rotates the model Kuruso in the direction of arrow φ), and when the storage arm c4S (to) moves in the direction of arrow @), the claw (
The groove (84a) of the claw (goods) is opened by the spring force of the thin part (84b) of the claw (goods) to create a predetermined gap.

Since the present invention adopts the above-described structure, the backlash of the one-way clutch after discharging causes a slight change in the shape of the vehicle (towards the end).
Even if it is rotated in the direction of the arrow φ), the groove 1 (8
4a) The effect that the gap between the teeth of the mold wheel and the teeth of the mold wheel can be made economically by reducing the gap so that the tip of the pawl and the tooth of the mold wheel do not collide and cause damage, and therefore the teeth of the mold wheel and the pawl can be made economically - I
be.

1.

[Brief explanation of the drawing]

1 to 8 are explanatory views showing the structure and operation of a conventional device, and FIG. 9 is a side view showing an embodiment of the present invention. In the figure, So is the mold wheel, (B) is the pawl, and (84a) is the Fi groove. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - JP-A-58-184233 (4)

Claims (1)

[Claims] By storing energy in the closing spring through crank operation and releasing the stored energy in the closing spring, the circuit breaker can be closed.
In the operation mechanism that performs tripping, the claw attached to the energy storage arm rotates the model wheel to perform the energy storage operation, and has a function that bends elastically by a certain amount during energy storage, and returns to its current shape when energy storage is complete. An electric spring operation mechanism for a circuit breaker, characterized by comprising: