CN201163576Y - switchgear - Google Patents

Abstract

A switch device that can be operated in automatic mode and manual mode, comprising: a frame with a circular groove on its operating surface, an operating handle arranged in the groove, a transmission mechanism arranged in the frame, the transmission mechanism It includes the main rotating part, the movable shaft that cooperates with the main rotating part and can move axially, the clutch gear that is axially movably installed on the output shaft of the motor, and the clutch gear that is installed on the output shaft of the motor and abuts against the lower end surface of the clutch gear. return spring, the lower end of the movable shaft is against the upper end face of the clutch gear, and the handle also includes a cam that pushes the movable shaft to move between the first position and the second position. At the first position of the movable shaft, The switch is in automatic mode; in the second position of the movable shaft, the switch is in manual mode. According to the switch device of the present invention, the reliability of operation is higher.

Description

switchgear

technical field

The utility model relates to a switch device with manual and automatic operation modes, in particular to a switch device used in ATSE (Automatic Transfer Switch Electric Appliance).

Background technique

Switching devices are widely used in many fields, for example for power supply in emergency situations. In the event of a sudden power failure, switching devices are typically activated to divert the power line from the normal source to a backup source, such as an independent generator. Most switching devices work in two modes, automatic and manual, to complete the switching action.

However, in the prior art, even in the manual mode, the handle is connected with the clutch gear. Since the motor is connected to the clutch gear, additional force is required to turn the motor. Even when the power supply to the motor is cut off, the force required is still considerable. To make operation in manual mode easier, the switchgear uses an auxiliary handle that fits over the operating handle and provides increased torque. But the auxiliary handle is a separate component and thus prone to loss. In addition to this shortcoming, the prior art has a more serious shortcoming. In manual mode, due to possible misoperation, the motor may still be powered and even receive wrong operation instructions, and manual operation may cause damage to the motor and other safety issues.

In order to solve the above problems, the present applicant disclosed an improvement to the switch device in ATSE (Automatic Transfer Switching Equipment) in Chinese invention patent application 200510092767.2. Among them, a handle that can be accommodated in a circular groove is used, and the handle can be pulled out and pressed down, so as to drive the main gear to engage or disengage from the clutch gear to realize the conversion between automatic mode and manual mode.

But above-mentioned switchgear still has defect, and this is exactly when depressing handle and main gear and clutch gear are engaged, and the position of main gear and clutch gear is not fixed, and the internal tooth of main gear and the tooth of clutch gear may end up dead, So that the handle cannot be depressed smoothly to realize the conversion from the manual mode to the automatic mode, and reliable operation cannot be realized. And because the main gear needs to move up and down, the occupied space of the mechanism is relatively large, and the cost increases.

Utility model content

The technical problem to be solved by the utility model is to provide a switch device which can reliably realize switching operation in automatic mode and manual mode.

For this reason, the utility model provides a switch device that can be operated in automatic mode and manual mode, including: a frame with a circular groove on its operating surface, an operating handle set in the groove, set on the machine The transmission mechanism in the frame, the transmission mechanism includes a main rotating part, a movable shaft that cooperates with the main rotating part and can move axially, a clutch gear that is movably installed on the output shaft of the motor in the axial direction, and is installed on the On the output shaft of the motor and against the return spring on the lower end surface of the clutch gear, the lower end of the movable shaft is against the upper end surface of the clutch gear; the handle also includes pushing the movable shaft to make it A cam that moves between a first position and a second position, in the first position of the movable shaft, the switching device is in automatic mode, the clutch gear is engaged with the main rotary part under the force of the return spring, the main rotary part Driven by the motor to drive the switch gear to rotate; at the second position of the movable shaft, the switch device is in the manual mode, the clutch gear overcomes the force of the return spring and disengages from the main rotating part, and the main rotating The part is driven by the handle so as to drive the switch gear to rotate.

Compared with the prior art, the operating reliability of the switching device according to the utility model is higher. Since the clutch gear is moving during the clutching process of the main rotating part and the clutch gear, when entering into engagement, the clutch gear driven by the motor rotates to cooperate with the main rotating part, and can be properly meshed with the internal teeth of the main rotating part position, and there will be no phenomenon of mutual support, so as to ensure the reliability of the operation. And because the up and down movement of the main rotating part in the prior art is replaced by the up and down movement of the clutch gear, the occupied space is reduced.

In one solution of the present invention, the switch device further includes a micro switch mechanism connected to the main rotating member, including a micro switch and a micro switch driving member. The micro switch mechanism can avoid accidental starting of the motor in manual mode.

The main rotating part in the utility model can be a main gear meshed with a switch gear or a driving disc matched with a fork-shaped switch mechanism.

Description of drawings

Figure 1 shows a cross-sectional view of a prior art switchgear in automatic mode;

Fig. 2 shows a cross-sectional view of the switch device of the prior art shown in Fig. 1 in manual mode;

Fig. 3 shows an exploded perspective view of the clutch device of the switchgear according to the present invention;

Fig. 4 shows a cross-sectional view when the movable shaft of the clutch device of the switch device according to the present invention is in the first position;

Fig. 5 shows another embodiment of the switching device adopting the clutch device of the present invention.

Detailed ways

Fig. 1 and Fig. 2 show that the applicant discloses the improvement of the switching device in the ATSE (automatic transfer switching equipment) of the applicant in the Chinese invention patent application 200510092767.2, respectively showing that the switching device is in automatic mode and manual mode Sectional view below. Switch device 200 comprises, frame 21, has circular groove 211 on its operating surface; The operating handle 230 that is arranged in this groove; And transmission mechanism, it comprises the main gear 240 that is connected with handle 230, and motor (not shown Out) the clutch gear 250 connected, and the switch gear 260 connected with the main gear 240. The handle 230 is rotatable around its center in a circular groove (not shown), and a part of the handle 230 forms a cam 231 . The support shaft 212 is fixed on the frame 210 and passes through the handle 230 so that the handle 230 can rotate around the support shaft 212 .

In the automatic mode shown in FIG. 1 , the handle 230 is in a lower position, and the entire handle does not protrude from the circular groove. The cam 231 presses the main gear 240 against the spring force to a lower position where the main gear 240 engages with the clutch gear 250 and can be driven by it. In this embodiment, the main gear 240 has several teeth on its lower inner surface, which cooperate with the teeth on the outer surface of the clutch gear 250 to form an internal gear transmission.

When voltage is applied to the motor, the motor rotates and drives the clutch gear 250 to rotate. Since the main gear 240 meshes with the clutch gear 250, the main gear 240 is also driven to rotate. This causes the switch gear 260 to rotate and completes the switching action of switching a switch assembly, such as a load switch, to another position. At the same time, the handle 230 is turned and the angle of rotation is indicated by means of markings on it.

In the manual mode shown in FIG. 2 , the handle 230 is at a higher position, protruding upward from the circular groove 211 and forming a right angle with the operating surface. When the handle 230 is rotated from the automatic mode shown in FIG. 1 to the manual mode shown in FIG. 2 , the cam 231 is also rotated, and the contact point between the cam 231 and the main gear 240 retreats in an upward direction. Thus the main gear 240 is pushed/pulled toward a higher position by a spring (not shown), so that the main gear 240 is disengaged from the clutch gear 250 .

After the handle 230 is lifted, it can be rotated around the center of the circular groove 211 by hand. Since the main gear 240 is connected with the handle 230, the main gear 240 is driven to also rotate. This causes the switch gear 260 to rotate and complete the switching action. Markings on the handle 230 and on the operating surface indicate the angle of rotation so that the desired rotation can be achieved.

In the above switch device, the handle 230, the main gear 240, and the clutch gear 250 together with the spring form a clutch device. The clutch device realizes engagement and disengagement between the main gear 240 and the clutch gear 250 by means of the cam 31 and the spring.

But, as described in the background technology, the defect of above-mentioned switch device is that when the main gear 240 is engaged with the clutch gear 250 when the handle 230 is depressed, the positions of the main gear 240 and the clutch gear 250 are not fixed, and the position of the main gear 240 The internal teeth and the teeth of the clutch gear 250 may be blocked, so that the handle 230 cannot be smoothly depressed to realize the conversion between the manual mode and the automatic mode, and reliable operation cannot be realized. And because the main gear needs to move up and down, the occupied space of the mechanism is relatively large, and the cost increases.

For this reason, the applicant proposes the improved structure of the present utility model as shown in Fig. 3 and 4. For the sake of simplicity, Fig. 3 only schematically shows the structure of the switch device of the present invention which is different from that shown in Fig. 1 and Fig. 2 .

Referring to Fig. 3 and Fig. 4, the switchgear of the present utility model comprises: frame, has circular groove 311 on its operating face; The operating handle 330 that is arranged in this circular groove 311; The transmission mechanism that is arranged in the frame , comprising a main gear 340, a movable shaft 380 cooperating with the main gear 340 and movable axially, a clutch gear 350 axially movably mounted on the motor output shaft 390, a switch gear (not shown) connected to the main gear Out), installed on the motor output shaft 390 and against the return spring 370 of the lower end face 351 of the clutch gear 350. The lower end of the movable shaft 380 abuts against the upper end surface 352 of the clutch gear. The switch gear has at least two switch positions On and OFF.

The handle 330 is supported by a support shaft 312 installed on the frame, and has a cam 331 . The handle 330 is connected with the main gear 340, and the rotation of the handle 330 around the center of the circular groove (corresponding to the axis of the main gear) will drive the rotation of the main gear, otherwise, the rotation of the main gear around the axis will drive the handle 330 around the circular groove. The rotation of the center of the groove. The main gear 340 includes an internal tooth portion 342 cooperating with the clutch gear 350 , an external tooth portion (not shown) cooperating with the switch gear, and an axially extending portion 341 cooperating with the movable shaft 380 .

As shown in FIG. 4 , the switch device of the present invention is in the automatic mode, and the handle 330 is in the circular groove 311 . The smaller diameter portion of the cam 331 is pressed against the movable shaft 380 . The movable shaft 380 at this time is at the first position. The lower end of the movable shaft may be designed to include an inner concave portion 381 and an outer edge portion 382 located on the periphery of the inner concave portion, and the outer edge portion 382 abuts against the upper end surface 352 of the clutch gear 350 . The clutch gear 350 is kept in contact with the outer edge portion 382 of the movable shaft 380 by the elastic force of the return spring 370, and the teeth of the clutch gear 350 mesh with the inner tooth portion 342 of the main gear 340, thereby stably rotating the motor output shaft 390. It is transmitted to the switch gear through the main gear 340.

When it is necessary to switch the switch device 300 from the automatic mode to the manual mode, lift the handle 330, and the cam 311 turns into a part with a larger diameter and presses on the movable shaft 380, thereby pressing the movable shaft 380 to the second position. The outer edge portion 382 presses down the upper end surface 352 of the clutch gear 350, so that the clutch gear 350 overcomes the elastic force of the return spring 370 and moves down along the output shaft 390 of the motor, and gradually disengages from the inner tooth portion 342 of the main gear 350. At this time, the movable shaft 380 moves downward relative to the circumferentially extending portion 341 of the main gear and accommodates the end of the motor output shaft 390 through its concave portion 381, so that the axial movement of the movable shaft 380 does not interfere with the output shaft of the motor. 390 Interference occurs. After the main gear is disengaged from the clutch gear, the main gear 340 connected to the handle can be driven to rotate by turning the handle 330 around the center of the circular groove 311, thereby manually driving the switch gear to switch between switch positions.

When it is necessary to switch from the manual mode to the automatic mode, the handle 330 turns back to the position shown in FIG. Even if the teeth of the clutch gear 350 and the teeth of the main gear 340 are not in the correct position for proper meshing, due to the rotation of the motor, the clutch gear 350 is driven to rotate and cooperate with the main gear 340. The meshing can be smoothly entered, without the phenomenon of pinching each other in the prior art.

In the utility model, the movable shaft and clutch gear with relatively simple structure are moved between different positions, instead of the main gear, thereby reducing the space of the mechanism and reducing the cost.

In order to avoid accidentally starting the motor during manual operation, a micro switch mechanism associated with the handle 330 may also be provided, including a micro switch 400 and a micro switch driver 410 . The micro switch 400 is electrically connected with the motor, and can realize turning on and off of the motor. As shown in the figure, the micro switch 400 is fixedly installed on the frame. The micro switch driving part 410 is arranged between the handle 300 and the main gear 340, and can be a disk-shaped part. The handle cam 331 is pressed on the micro switch driving part 410, and the rotation of the handle cam 331 makes the micro switch driving part 410 and The movable shaft 380 moves simultaneously. The micro switch driving member 410 may have an inclined chamfered driving surface 411 on its edge, and the micro switch 400 has an inclined switch surface matched with the chamfered driving surface. When the handle 300 is in the circular groove 311 and the movable shaft 380 is in the first position, the chamfered driving surface 411 of the microswitch driver 410 is not in contact with the switch surface of the microswitch 400, and the microswitch 400 is at this moment. connected state. When the handle 300 is pressed down so that the movable shaft is in the second position, the chamfered drive surface 411 of the micro switch driver 410 presses down the switch surface of the micro switch 400 during the descent process, and the micro switch 400 is disconnected, and the Power to the motor, thus preventing possible rotation of the motor in manual mode.

In the above embodiments, the main gear 340 is engaged with the external switch gear to transmit the rotational motion of the motor to realize the switching action. But the application of the present utility model is not limited to the above-mentioned gear transmission mechanism. The main gear in the above embodiments can be replaced by other forms of main rotating parts. For example, the clutch device of the present invention can be applied to a switch device in the form of a drive disc-fork rocker known in the art. Figure 5 schematically shows an example of such a switching device.

In the device shown in FIG. 5, the drive plate 510 replaces the main gear in the embodiment shown in FIGS. 3-4 as the main rotating member. Drive shafts 511 and 512 are arranged on the drive plate 510. When the drive plate 510 rotates, the drive shafts 511 and 512 respectively cooperate with the fork rockers 520 and 530 arranged on both sides of the drive plate 510 and drive the fork rockers to swing. The fork-shaped rocker cooperates with an unshown switch mechanism to realize switch action.

Although the utility model has been described with reference to the preferred embodiment, the utility model is not limited thereto, and those skilled in the art can make various equivalent modifications to the utility model without departing from the spirit and essence of the utility model And changes, and these deformations and changes are all within the scope of the present utility model.

Claims (9)

1. the switching device that can operate under automatic mode and manual mode comprises:

Frame has circular recess on its operating surface,

Be arranged on the operating grip in this groove,

Be arranged on the transmission mechanism in the frame, described transmission mechanism comprises main rotating part,

It is characterized in that, described transmission mechanism also comprise cooperate with described main rotating part and axially displaceable movable axis, with being axially moveable be installed in clutch gear on the motor output shaft, be installed on the motor output shaft and against the back-moving spring of described clutch gear lower surface, the upper surface of the described clutch gear of lower end abutment of described movable axis

Described handle also comprises the described movable axis of pushing moves it between the primary importance and the second place cam, primary importance place at described movable axis, described switching device is in automatic mode, clutch gear engages with main rotating part under the active force of back-moving spring, rotates thereby main rotating part drives switch gear by described motor; At the second place place of described movable axis, described switching device is in manual mode, and clutch gear overcomes the active force of back-moving spring and breaks away from main rotating part, rotates thereby described main rotating part drives switch gear by described handle.

2. switching device as claimed in claim 1, it is characterized in that, the lower end of described movable axis has female parts and is positioned at the peripheral edge portion of female parts periphery, described peripheral edge portion is against the upper surface of described clutch gear, described female parts is held the end of motor output shaft, and the axial motion of described movable axis does not interfere with the output shaft of described motor.

3. switching device as claimed in claim 1 is characterized in that, also comprises the back shaft that is fixed on the frame, and the cam of described handle pushes movable axis around this back shaft rotation and moves between the primary importance and the second place.

4. switching device as claimed in claim 1 is characterized in that, described main rotating part comprise the interior toothed portion that cooperates with described clutch gear and cooperate with described movable axis extend axially part.

5. switching device as claimed in claim 1 is characterized in that, also comprises the sensitive switch mechanism that is associated with described handle, comprises sensitive switch and sensitive switch actuator, and described sensitive switch is electrically connected with motor.

6. switching device as claimed in claim 5 is characterized in that, described sensitive switch actuator is arranged between handle and the main rotating part, moves simultaneously with master gear and movable axis by the pushing of described handle cam; Described sensitive switch is fixedly mounted on the frame, when movable axis is in primary importance, described sensitive switch actuator does not contact with described sensitive switch, thereby make described sensitive switch be in on-state, when movable axis was in the second place, described sensitive switch actuator is oppressed described sensitive switch made it be in off-state.

7. switching device as claimed in claim 6 is characterized in that, described sensitive switch actuator has the chamfering drive surface of inclination, and described sensitive switch has the switching surface of the inclination that cooperates with described chamfering drive surface.

8. as each described switching device among the claim 1-7, it is characterized in that described main rotating part is a master gear, cooperate with external switch gear.

9. as each described switching device among the claim 1-7, it is characterized in that described main rotating part is a driving-disc, engage with external fork-shaped switching mechanism.

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