CN204088094U - The driving mechanism of switching device shifter and switching device shifter thereof - Google Patents

Abstract

In the driving mechanism of the switching device, the driving shaft (10) has a locking portion (12) in its circumferential direction. The transmission block (20) has a locking portion (22). The rotation of the transmission block can make the elastic driving assembly (30) store elastic energy, the elastic driving assembly releases the elastic energy to drive the transmission block to rotate, and the elastic driving assembly has a dead point position where the elastic restoring force of the elastic driving assembly is maximized. The driving end (424) of the stop component (40) can be in contact with the locking part, and the locking part can push the driving end so that the stopping end (422) approaches or moves away from the locking part. When the drive mechanism of the switching device cannot be separated from the movable contact and the fixed contact by welding, if the drive shaft rotates from the closed position to the open position and the elastic drive assembly crosses the dead point position, the locking part can abut against the stop end, so as to Limiting the drive shaft rotation prevents the drive shaft from turning to the disconnected position.

Description

Driving mechanism of switching device and switching device thereof

technical field

The utility model relates to a driving mechanism, in particular to a driving mechanism for a switching device. The utility model also provides a switching device using the driving mechanism.

Background technique

Switching devices are devices used to open and close circuits, such as disconnectors, fuse switches, etc. The switching device generally includes a movable contact, a fixed contact, and a driving mechanism for driving the movable contact to contact or separate from the fixed contact.

The driving mechanism of the switching device is provided with a driving shaft and an elastic driving assembly. By rotating the drive shaft, the elastic drive assembly can store elastic energy. When the elastic drive assembly passes the dead point where the elastic energy is the largest, the elastic drive releases the elastic energy and drives the movable contact to contact and separate from the fixed contact, thereby realizing On-off control of power supply lines. Typically, there is a closed position and an open position during the rotation of the drive shaft. The closed position is used to indicate that the movable contact of the switching device is in contact with the fixed contact, and the open position is used to indicate that the movable contact has been separated from the fixed contact.

In the use of the switchgear, there is a situation where the movable contact and the fixed contact are welded due to the passing of a large current. If the movable contact and the fixed contact are severely welded and cannot be separated, the drive shaft may still rotate to The disconnected position brings safety hazards to the use of the switching device.

Utility model content

The purpose of the utility model is to provide a driving mechanism of a switching device, which prevents the driving shaft from turning to the disconnected position when the movable contact and the fixed contact cannot be separated by welding.

Another object of the present utility model is to provide a switching device using the driving mechanism.

The utility model provides a driving mechanism of a switching device, which comprises a driving shaft, a transmission block, an elastic driving assembly and a stop assembly. The drive shaft is rotatably arranged on the switching device, and it has an open position indicating that the movable contact of the switching device is separated from the fixed contact, and a closed position indicating that the movable contact of the switching device is in contact with the fixed contact. It has a locking portion in its circumferential direction. The rotation of the drive shaft can drive the transmission block to rotate, and the rotation of the transmission block can drive the movable contact of the switching device to contact or separate from the fixed contact, and the transmission block has a locking part. The rotation of the transmission block can make the elastic driving assembly store elastic energy, and the elastic driving assembly releases the elastic energy to drive the transmission block to rotate, and the elastic driving assembly has a dead point position where the elastic restoring force of the elastic driving assembly is maximized. The stopper assembly is arranged on the switching device, and it includes a stopper lever. The stopper lever has a stopper end and a driving end. The drive end can be in contact with the locking part, and the locking part can push the driving end so that the stopper end Move closer to or away from the lock. If the driving shaft rotates from the closing position to the disconnecting position and the elastic driving assembly crosses the dead point, the locking part can abut against the stop end to limit the rotation of the driving shaft.

The drive mechanism of the switching device can prevent the drive shaft from rotating to the disconnected position when the movable contact and the fixed contact cannot be separated by welding.

In yet another exemplary embodiment of the driving mechanism of the switching device, the locking part has a sliding surface, a pushing surface, and a stop surface. If the driving end moves along the sliding surface, along the axial direction of the driving shaft, the stop end is always away from the locking portion. If the driving end moves along the pushing surface, along the axial direction of the driving shaft, the stop end approaches or moves away from the locking portion. If the driving end moves along the stop surface, the locking part can abut against the stop end during the rotation of the drive shaft.

In another exemplary embodiment of the driving mechanism of the switching device, the stop assembly includes a spring, and the spring can push the stop rod so that the driving end contacts the locking part.

In yet another exemplary embodiment of the driving mechanism of the switching device, the transmission block has a pair of sliding ends. The elastic driving assembly includes a pair of spring mechanisms, which are oppositely arranged on both sides of the transmission block. Each spring mechanism includes a transmission part and an elastic part. The transmission part is provided with a contact end and a transmission end, and the contact end can slide along the circumferential contour of the sliding end. The elastic member can be in contact with the transmission end, and it can exert an elastic force towards the transmission block on the transmission member.

In yet another exemplary embodiment of the driving mechanism of the switching device, the locking portion is a protrusion extending radially along the driving shaft.

The utility model also provides a switching device, which includes a casing and the above-mentioned driving mechanism. The casing includes a drive casing and a transmission casing. The drive shaft can be installed in the drive casing, and the transmission block and the elastic drive assembly can be installed in the transmission casing.

Description of drawings

The following drawings only schematically illustrate and explain the utility model, and do not limit the scope of the utility model.

FIG. 1 is a schematic structural view illustrating an exemplary embodiment of a driving mechanism of a switching device.

2 to 7 are used to illustrate the movement process of the driving mechanism of the switching device when the movable contact is welded to the fixed contact.

Fig. 8 shows a schematic structural view of an exemplary embodiment of a switching device.

Label description

10 drive shaft

12 Locking part

20 drive block

22 Locking part

222 sliding surface

224 push surface

226 stop surface

24 sliding end

30 elastic drive components

32 spring mechanism

34 transmission parts

342 contact end

344 drive end

36 elastic parts

40 stop assembly

42 stop lever

422 stop end

424 drive end

44 spring

50 shells

52 drive case

54 Transmission case.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings, and the same symbols in each figure represent the same parts.

In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions.

In order to make the drawings concise, the parts related to the utility model are only schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

Herein, "a" not only means "only one", but also means "more than one".

FIG. 1 is a schematic structural view illustrating an exemplary embodiment of a driving mechanism of a switching device. As shown in FIG. 1 , the driving mechanism of the switching device includes a driving shaft 10 , a transmission block 20 , an elastic driving assembly 30 , and a stop assembly 40 .

Wherein, the drive shaft 10 is arranged in the switching device, and the drive shaft 10 can be driven to rotate by the operating handle or the drive motor, and then transmitted to the transmission block 20, and the rotation of the transmission block 20 drives the electrical connection between the movable contact and the fixed contact. connect. During the rotation process of the drive shaft 10, it is provided with a disconnected position and a closed position. When the drive shaft 10 is in the open position, the movable contact is separated from the fixed contact; when the drive shaft 10 is in the closed position, the movable contact is in contact with the fixed contact. The drive shaft 10 has a locking portion 12 in the circumferential direction. In an exemplary embodiment of the driving mechanism of the switching device, the locking portion 12 is a protrusion extending radially along the driving shaft 10 .

When the drive shaft 10 rotates between the closed position and the open position, the drive shaft 10 can drive the transmission block 20 to rotate, and the rotation of the transmission block 20 can be transmitted to the movable contact of the switching device, so that the movable contact and the fixed contact point contact or separation. The transmission structure between the transmission block 20 and the drive shaft 10, and the transmission structure between the transmission block 20 and the fixed contact of the switching device can adopt any known structure, which will not be repeated here. The transmission block 20 has a locking portion 22 . As shown in Figure 1, in a schematic embodiment of the driving mechanism of the switching device, the locking part 22 has a sliding surface 222, a pushing surface 224, and a stop surface 226, and the sliding surface 222 and the stop surface 226 is a plane, and the pushing surface 224 is an inclined plane. The drive block 20 has a pair of sliding ends 24 .

When the drive shaft 10 drives the transmission block 20 to rotate, the rotation of the transmission block 20 can cause the elastic drive assembly 30 to store elastic energy, and when the elastic drive assembly 30 releases the elastic energy, the elastic drive assembly 30 can drive the transmission block 20 to rotate quickly, thereby Realize quick contact or separation of movable contacts and fixed contacts. The elastic driving assembly 30 has a dead point position, and when the elastic driving assembly 30 is at the dead point position, the elastic energy of the elastic driving assembly is maximum.

As shown in FIG. 1 , in an exemplary embodiment of the driving mechanism of the switching device, the elastic driving assembly 30 includes a pair of spring mechanisms 32 , which are disposed on opposite sides of the transmission block 20 . Each spring mechanism 32 includes a transmission member 34 and an elastic member 36 . The transmission member 34 has a contact end 342 and a transmission end 344 . The contact end 342 is slidable along the circumferential contour of the sliding end 24 . The elastic member 36 can be in contact with the transmission end 344 . When the transmission block 20 rotates and pushes the transmission member 34 so that the elastic member 36 is compressed, the elastic drive assembly 30 stores elastic energy; The elastic energy is released; when the elastic forces applied by the two elastic members 36 to the sliding end 24 are in the same straight line, the elastic driving assembly 30 is at the dead point.

The stop assembly 40 is disposed on the switching device, and it includes a stop rod 42 . The stop lever 42 has a stop end 422 and a drive end 424 . The driving end 424 can be in contact with the sliding surface 222 , the pushing surface 224 , and the stop surface 226 of the locking portion 22 . During the rotation of the transmission block 20 , the locking part 22 can push the driving end 424 , so that the stop end 422 approaches or moves away from the locking part 12 . As shown in Figure 1, in a schematic implementation of the driving mechanism of the switching device, when the driving end 424 moves along the sliding surface 222, the stop end 422 is always away from the locking part 12; when the driving end 424 moves along the pushing surface 224 , along the axial direction of the drive shaft 10, the distance between the stop end 422 and the locking portion 12 can increase or decrease; The locking portion 12 abuts against the stop end 422 to limit the rotation of the driving shaft 10 . The stop assembly 40 includes a spring 44, the spring 44 can push the stop rod 42, and under the elastic thrust of the spring 44, the driving end 424 of the stop rod 42 and the sliding surface 222, the pushing surface 224, or the stopper of the locking part 22 The moving surface 226 is in contact.

2 to 7 are used to illustrate the movement process of the driving mechanism of the switching device when the movable contact is welded to the fixed contact. As shown in Fig. 2 and Fig. 3, Fig. 3 is a view along the direction indicated by arrow A in Fig. 2 . At this time the drive shaft 10 is in the closed position (ON). The driving end 424 of the stop rod 42 is in contact with the stop surface 226 , but the locking portion 12 is away from the stop end 422 , and the drive shaft 10 can rotate freely. The elastic member 36 of the elastic drive assembly 30 is not compressed.

The drive shaft 10 starts to rotate from the closed position (ON) to the open position (OFF). The rotation of the drive shaft 10 drives the rotation of the transmission block 20 . The sliding end 24 of the transmission block 20 starts to compress the elastic member 36 through the transmission member 34 . As shown in Fig. 4 and Fig. 5, Fig. 5 is a view along the A-A direction of Fig. 4, and only the transmission block is cut in the figure. At this time, the elastic driving assembly 30 is at the dead point, the elastic deformation of the elastic member 36 is the largest and the elastic restoring force is the largest. The driving end 424 of the stop rod 42 is still in contact with the stop surface 226 , the locking portion 12 is close to the stop end 422 , and the drive shaft 10 can continue to rotate toward the disconnected position (OFF).

As shown in Fig. 6 and Fig. 7, Fig. 7 is a view along the A-A direction of Fig. 6, and only the transmission block is cut in the figure. The rotation of the driving shaft 10 drives the rotation of the transmission block 20, so that the elastic driving assembly 30 passes over its dead center position.

If the movable contact and the fixed contact of the switching device can be separated smoothly, the elastic driving assembly 30 will quickly release the elastic energy. The elastic driving assembly 30 drives the transmission block 20 to rotate rapidly. The rotation direction of the transmission block 20 is the same as that of the drive shaft 10 , and the rotation speed of the transmission block 20 is much faster than that of the drive shaft 10 . During the rotation of the transmission block 20 , the driving end 424 of the stop rod 42 moves along the stop surface 226 , the push surface 224 , and the sliding surface 222 successively. Along the axial direction of the drive shaft 10 , the stop end 422 is away from the locking portion 12 . During the rotation of the drive shaft 10 to the disconnected position (OFF), the locking portion 12 and the stop end 422 will not contact each other.

If the movable contact cannot be separated from the fixed contact, the transmission block 20 stops rotating. The drive end 424 of the stop rod 42 is still in contact with the stop surface 226 . The locking portion 12 of the drive shaft 10 abuts against the stop end 422 to prevent the drive shaft 10 from continuing to rotate toward the disconnected position (OFF), so that the drive shaft 10 cannot indicate to the disconnected position (OFF).

Fig. 8 shows a schematic structural view of an exemplary embodiment of a switching device. Referring to FIG. 8 and FIG. 1 , the switching device includes a housing 50 and the above-mentioned driving mechanism arranged in the housing 50 .

The casing 50 includes a drive casing 52 and a transmission casing 54 . In the driving mechanism, the driving shaft 10 is installed in the driving casing 52 . The transmission block 20 and the elastic driving assembly 30 are installed in the transmission case 54 .

It should be understood that although this specification is described according to various implementations, not each implementation only includes an independent technical solution. This description of the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible implementation modes of the present utility model, and they are not used to limit the protection scope of the present utility model. Embodiments or changes, such as combination, division or repetition of features, should be included in the protection scope of the present utility model.

Claims (6)

1. The driving mechanism of the switching device, characterized in that it comprises: a drive shaft (10) rotatably disposed on said switching means, which has an off position indicating separation of the movable contact of said switching means from the fixed contact, and an indication of the movable contact of said switching means In a closed position in contact with a fixed contact, said drive shaft (10) has a locking portion (12) in its circumferential direction; A transmission block (20), the rotation of the drive shaft (10) can drive the rotation of the transmission block (20), and the rotation of the transmission block (20) can drive the movable contact and the fixed contact of the switching device Point contact or separation, the transmission block (20) has a locking part (22); An elastic driving assembly (30), the rotation of the transmission block (20) can make the elastic driving assembly (30) store elastic energy, and the elastic driving assembly (30) can drive the transmission block (20) by releasing the elastic energy ) rotates, and the elastic driving assembly (30) has a dead center position that maximizes the elastic restoring force of the elastic driving assembly (30); and A stop assembly (40) arranged on the switching device, which includes a stop lever (42), the stop lever (42) has a stop end (422) and a drive end (424), the The driving end (424) can be in contact with the locking portion (22), and the locking portion (22) can push the driving end (424) so that the stop end (422) approaches or moves away from the locking Department (12), If the drive shaft (10) rotates from the closed position to the open position and the elastic drive assembly (30) crosses the dead center position, the locking part (12) can abut against the stop The movable end (422) is used to limit the rotation of the drive shaft (10). 2. The driving mechanism of the switching device according to claim 1, characterized in that the locking part (22) has a sliding surface (222), a pushing surface (224), and a stop surface (226), If the driving end (424) moves along the sliding surface (222), along the axial direction of the driving shaft (10), the stop end (422) is always away from the locking portion (12), If the driving end (424) moves along the pushing surface (224), along the axial direction of the driving shaft (10), the stop end (422) approaches or moves away from the locking portion (12), If the driving end (424) moves along the stop surface (226), the locking part (12) can abut against the stop end (422) during the rotation of the driving shaft (10). 3. The driving mechanism of the switching device according to claim 1, characterized in that the stop assembly (40) comprises a spring (44), and the spring (44) can push the stop lever (42) to Make the driving end (424) contact with the locking part (22). 4. The driving mechanism of the switching device according to claim 1, characterized in that the transmission block (20) has a pair of sliding ends (24), The elastic driving assembly (30) includes a pair of spring mechanisms (32), which are relatively arranged on both sides of the transmission block (20), and each of the spring mechanisms (32) includes: a transmission member (34) provided with a contact end (342) and a transmission end (344), said contact end (342) being slidable along the circumferential profile of said sliding end (24); and An elastic member (36) that can be in contact with the transmission end (344) can exert an elastic force toward the transmission block (20) on the transmission member (34). 5. The driving mechanism of the switching device according to claim 1, characterized in that the locking portion (12) is a protrusion extending radially along the driving shaft (10). 6. Switching device, characterized in that it comprises: a housing (50) including a drive housing (52) and a transmission housing (54); and The drive mechanism according to any one of claims 1 to 5, wherein the drive shaft (10) can be mounted on the drive casing (52), and the transmission block (20) and the elastic drive assembly (30 ) can be installed in the transmission casing (54).