WO2019193619A1 - Installation and removal device for movable apparatus, and electrical apparatus - Google Patents

Abstract

This installation and removal device (50) for a movable apparatus is provided with: a frame (6) on which is mounted an apparatus (7) to be moved; links (3a and 5a), one end part of which movably supports the frame (6), and the other end part of which has formed thereon a worm wheel part (3c); a worm (2b) that meshes with the worm wheel part (3c) of the links (3a and 5a) and rotates the worm wheel part (3c); and a rotating means that is coupled to an operating shaft (2a) of the worm (2b) and rotates the worm wheel part (3c).

Description

Mobile equipment loading and unloading device and electrical equipment

The present application relates to a mobile device loading / unloading device and an electric device.

Conventionally, for example, a lead screw mechanism that moves a nut straight along a lead screw by rotating the lead screw in and out of a moving device in a switchgear (breaker, switch, disconnector, instrument transformer, etc.) (For example, refer to Patent Documents 1 and 2).

The conventional loading / unloading mechanism disclosed in, for example, Patent Document 1 described above includes a carriage on which a circuit breaker body coupled or separated to a mount frame installed behind a cradle is placed so as to be transportable, and moves the carriage back and forth. A pull-in and pull-out handle, a braking means for limiting the transport distance of the carriage transported by the pull-in and pull-out handle, and a girder assembly for supporting the pull-in and pull-out handle. Further, the carriage is drawn or pulled out along a box having an upper portion opened and a wall having a predetermined height formed on the outer peripheral surface, and guide rails erected on both sides of the cradle. Thus, it consists of two pairs of wheels installed on both sides of the box.

The pull-in and pull-out handles are a lead screw inserted in the front-rear direction in a through-hole formed in the front wall of the box, and an inner side of the front wall of the box in a state of being screwed to the lead screw. A transfer nut installed on the front, a “U” -shaped bracket fixed to the box to prevent the removal of the transfer nut, and a detachable installation at the front end so that the lead screw can be rotated forward and backward. It consists of an operation handle.

As described above, the conventional loading / unloading mechanism performs a moving-in / out operation of the device by using a mechanism for moving the nut straight along the lead screw by rotating the lead screw. The reason why many of these mechanisms are used is that the use of a lead screw and nut makes it possible to relatively easily configure the deceleration function and the generation of the linear thrust when converting the rotational operation force into the linear motion. .
In the process of moving the moving device in and out of the switch gear, the thrust required to insert the contact plug of the electric circuit contact in the vicinity of the final insertion position is maximized in the moving process. And the specification of the lead screw which comprises, the diameter of a transfer nut, and a lead pitch is determined based on this maximum thrust.

JP 2011-10544 A JP 2013-150375 A

However, in the process of moving the mobile device in and out, most of the thrust required for the movement is about the rolling resistance due to the weight of the mobile device, and may be much smaller than the maximum thrust described above. For this reason, the conventional loading / unloading mechanism wastes the reduction ratio of the lead screw, resulting in an obstacle to reducing the number of operation times and operation time, and has been a problem in terms of labor saving during loading / unloading work.
In addition, since the lead screw length that is equal to or greater than the moving dimension of the moving device is required, the depth dimension of the loading / unloading mechanism is determined, and the height dimension of the loading / unloading mechanism is determined by the nut external dimension associated with the lead screw diameter. Due to restrictions, there is a limit to downsizing of the apparatus, and there has been a problem that it cannot be reduced in size and weight.

The present application discloses a technique for solving the above-described problems, and can reduce the size of a mobile device that can be reduced in size and can be reduced in size while being capable of reducing the operation force, the number of operations, and the operation time. The purpose is to provide electrical equipment.

A mobile device loading / unloading device disclosed in the present application includes a frame on which a device to be moved is placed, a link that supports the frame to be movable at one end, and a worm wheel portion formed at the other end, and the link A worm that meshes with the worm wheel portion and rotates the worm wheel portion, and a rotating means that is coupled to the operating shaft of the worm and rotates the worm wheel portion.
In addition, the electrical device disclosed in the present application is characterized by using a mobile device loading / unloading device.

According to the mobile device loading / unloading device and the electric device disclosed in the present application, it is possible to obtain a moving device loading / unloading device and an electric device that can reduce the loading / unloading operation force, the number of operations, and the operation time and can be downsized. Can do.

1 is a perspective view showing a mobile device loading / unloading device according to Embodiment 1. FIG. 1 is a perspective view showing a mobile device loading / unloading device according to Embodiment 1. FIG. FIG. 2 is a perspective view in which a housing of the mobile device loading / unloading device shown in FIG. 1 is not shown. FIG. 4 is a side view of the mobile device loading / unloading apparatus shown in FIG. 3. FIG. 4 is a front view of the mobile device loading / unloading apparatus shown in FIG. 3. It is the sectional view on the AA line of FIG. FIG. 7 is a perspective view of FIG. 6. It is a perspective view which shows the state which mounted the mobile equipment in the mobile equipment removal / insertion apparatus by Embodiment 1, and was inserted in the switchgear. It is a side view of FIG. It is the figure which compared the reduction gear ratio (force ratio) at the time of using the moving-in / out apparatus according to Embodiment 1 and the conventional apparatus. FIG. 10 is a perspective view showing a mobile device loading / unloading device according to Embodiment 2. FIG. 10 is a partial enlarged view of a mobile device loading / unloading device according to Embodiment 3. FIG. 10 is a partial plan view of a mobile device loading / unloading device according to Embodiment 4. FIG. 10 is a partial front view of a mobile device loading / unloading device according to Embodiment 4.

The first embodiment will be described below with reference to the drawings.
In the drawings, the same reference numerals indicate the same or equivalent.

Embodiment 1 FIG.
1 and 2 are perspective views showing a mobile device loading / unloading apparatus according to Embodiment 1. FIG. FIG. 1 shows a mobile device loading / unloading device in a state in which the moving device is pulled out from a moving destination such as a switch gear, and FIG. 2 shows a moving device loading / unloading state in which the moving device is inserted into a moving destination such as a switch gear. The device is shown.
FIG. 3 is a perspective view showing the internal structure of the mobile device loading / unloading apparatus shown in FIG. 4 is a side view of the mobile device loading / unloading apparatus shown in FIG. 3, and FIG. 5 is a front view of the mobile device loading / unloading apparatus shown in FIG.

In the first embodiment, a mobile device loading / unloading device that inserts or pulls out an electrical device as a mobile device housed in a switch gear used in a power distribution facility into the switch gear will be described with reference to FIGS. 1 to 3. To do. Here, the electric equipment refers to a circuit breaker, a switch, a disconnector, an instrument transformer, and the like.
1 to 3, the mobile device loading / unloading device 50 has a housing 1, a worm 2 b rotatably supported by the housing 1, and worm wheel portions 3 c and 3 d respectively meshing with the worm 2 b at the respective end portions. Worm wheel links 3a and 3b, connecting links 5a and 5b connected to the worm wheel links 3a and 3b, respectively, and a movable frame 6 connected to the connecting links 5a and 5b are provided.

The operation shaft 2a provided at one end of the worm 2b engages with an operation handle (not shown) that is mounted when the moving device 7 such as a circuit breaker is pulled out or inserted into the switch gear. The worm gear 2 is composed of the worm 2b and the worm wheel of the worm wheel portions 3c and 3d.
Further, the worm wheel links 3a and 3b are rotatably arranged around the pins 4a and 4b which are rotation support shafts. The worm wheel portions 3c and 3d are formed at the end portions of the worm wheel links 3a and 3b, respectively, and are engaged with the screw portions of the worm 2b. One end portions of the connecting links 5a and 5b are pin-coupled to the worm wheel links 3a and 3b so as to be rotatable. The other ends of the connecting links 5a and 5b are rotatably connected to the movable frame 6 by connecting pins 5c and 5d. The worm wheel links 3a and 3b, the connecting links 5a and 5b, and the movable frame 6 constitute a pantograph link.

The movable frame 6 constitutes a movable end of the pantograph, and a moving device 7 such as a circuit breaker that is put in and out of a switch gear (not shown) is placed thereon. Moreover, the fixed side locking member 8 provided in the housing 1 fixes the housing 1 to a switch gear, for example. The housing 1 houses and supports the worm 2b and the worm wheel portions 3c and 3d of the worm wheel links 3a and 3b. Further, the tooth portions of the worm wheel portions 3c and 3d have a three-dimensional curved surface structure.

6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a perspective view of FIG. FIG. 8 is a perspective view showing a state in which a circuit breaker is mounted on the mobile device loading / unloading apparatus according to Embodiment 1 and inserted into a switchgear (not shown). FIG. 9 is a side view of FIG.
As shown in FIG. 6, the movable frame 6 has a configuration in which the ends of the connection links 5a and 5b are sandwiched between two plates, and the movable frame 6 and the ends of the connection links 5a and 5b are defined as follows. , And are rotatably connected by connecting pins 5c and 5d. Further, as shown in FIG. 7, the movable frame 6 has a through hole 6a. A bolt (not shown) is inserted through the through hole 6a from below the movable frame 6, and a circuit breaker or the like is inserted. The mobile device 7 is fixed.

In the first embodiment, as shown in FIGS. 8 and 9, an example in which the moving device 7 such as a circuit breaker is fixed to the four through holes 6a with four bolts is shown. However, the number of the through holes 6a is as follows. However, the present invention is not limited to this and can be selected as appropriate.
Further, as shown in FIG. 7, the movable frame 6 is formed with a rectangular discard hole 6b. This is intended to reduce the weight of the movable frame 6. In the first embodiment, the example in which the four discard holes 6b are formed is shown, but the number of the discard holes 6b can be selected as appropriate.

Next, the operation will be described. By inserting an operation handle (not shown) into the operation shaft 2a of the worm 2b and rotating the worm 2b, power is transmitted to the worm wheel portions 3c and 3d of the worm wheel links 3a and 3b arranged on both sides of the worm 2b. To do. The worm wheel links 3a and 3b rotate around the pins 4a and 4b, which are rotation support shafts, so as to approach each other, so that the pantograph link extends in the depth direction of the switch gear, and the movable frame 6 extends from the connection links 5a and 5b. Thrust is transmitted in the depth direction of the switchgear. As a result, the moving device 7 such as a circuit breaker attached to the movable frame 6 can be moved in the front-rear direction (straight direction) of the switch gear.

Further, by rotating the operation shaft 2a of the worm 2b in the direction opposite to that described above, the worm wheel links 3a and 3b are rotated in directions away from each other, so that the worm wheel links 3a and 3b, the connecting links 5a and 5b are movable. When the pantograph link including the frame 6 contracts in the depth direction of the switch gear, the moving device 7 such as a circuit breaker attached to the movable frame 6 can be pulled out to the original position (drawing position).

As described above, in the operation of putting in and out of the circuit breaker which is the mobile device 7, the force required in most of the moving process is due to the rolling resistance due to the weight of the mobile device 7 (the rolling resistance of the wheel supporting the mobile device 7). is there.
This rolling resistance is a much smaller force than the thrust or operating force required when a mechanical or electrical connection is required in the final insertion region A, which is the final insertion position. Here, the final insertion position is a position where the mobile device 7 is connected to the main circuit in the switch gear. In addition, mechanical means the mechanical force required to connect electrical connectors that connect each other when the mobile device 7 is connected to the main circuit in the switchgear.
The mobile device loading / unloading apparatus 50 according to the first embodiment uses a place where the reduction ratio is maximized in accordance with the final insertion region A where the pantograph link is fully extended by using the variable doubling function of the force by the toggle mechanism in the pantograph link. can do. Therefore, the operation force of the mobile device loading / unloading apparatus 50 can be used without waste, the number of operations can be reduced, and labor saving in the operation work can be realized.

FIG. 10 shows the change in the reduction ratio (force ratio) when using the mobile device loading / unloading device according to Embodiment 1 compared with the reduction ratio (force ratio) when using the conventional device (lead screw structure). FIG. That is, FIG. 10 is a graph showing the characteristics of the above-described pantograph toggle mechanism. That is, as the characteristics of the pantograph link, at the beginning of expansion from the contracted state, the movable frame 6 moves largely with respect to the rotation amount of the worm wheel links 3a and 3b, and the generated thrust is small because the reduction ratio is small. However, since the movement amount with respect to the rotation amount of the worm wheel links 3a and 3b decreases toward the final position and the reduction ratio increases, a large thrust can be configured with an efficient reduction ratio. Therefore, the mobile device loading / unloading device 50 according to the first embodiment can be operated with a small number of rotations without waste.

In addition, since the mobile device loading / unloading device 50 according to the first embodiment can be formed of a thin plate that can be processed with a sheet metal or the like, the components of the pantograph link can be made thin and the height of the entire moving device loading / unloading device 50 can be suppressed. It is possible to configure.
In the conventional lead screw structure, the size of the device corresponding to the loading / unloading direction corresponding to the moving dimension to be loaded / unloaded is required. However, in the moving device loading / unloading device 50 of the first embodiment, the movement is caused by contraction of the pantograph link. Since the device 7 is moved, the size of the device corresponding to the moving dimension to be taken in and out becomes unnecessary.
Further, the moving device loading / unloading device 50 according to the first embodiment is not required for the restriction in the height direction due to the nut outer dimension accompanying the lead screw diameter required in the conventional lead screw structure. Therefore, the mobile device loading / unloading device 50 according to the first embodiment can be reduced in size or weight as compared with the conventional device.

Embodiment 2. FIG.
FIG. 11 is a perspective view showing a mobile device loading / unloading apparatus according to the second embodiment.
Hereinafter, the mobile device loading / unloading apparatus 50 according to the second embodiment will be described with reference to FIG.
As shown in FIG. 11, the mobile device loading / unloading device 50 according to the second embodiment is provided with a link composed of a connection link 5 a and a worm wheel link 3 a only on one side of the movable frame 6.
Also in the second embodiment, similarly to the first embodiment, the mobile device loading / unloading device 50 includes the housing 1, the worm 2b rotatably supported by the housing 1, and the worm wheel portion 3c meshing with the worm 2b. A worm wheel link 3a, a connecting link 5a connected to the worm wheel link 3a, and a movable frame 6 connected to the connecting link 5a. The operation shaft 2a provided at one end of the worm 2b engages with an operation handle (not shown) that is mounted when the moving device 7 such as a circuit breaker is pulled out or inserted into the switch gear.

The worm wheel link 3a is rotatably arranged with the pin 4a, which is a rotation support shaft, as an axis. The worm wheel portion 3c is formed at an end portion of the worm wheel link 3a and is engaged with a screw portion of the worm 2b. One end of the connecting link 5a is pin-coupled to the worm wheel link 3a so as to be rotatable. The other end of the connecting link 5a is rotatably connected to the movable frame 6 by a connecting pin 5c.
The movable frame 6 is coupled to a moving device 7 such as a circuit breaker that is taken in and out of a switch gear (not shown). The housing 1 houses and supports the worm 2b and the worm wheel portion 3c of the worm wheel link 3a.

In the mobile device loading / unloading device 50 according to the second embodiment, the linear motion guide 9 of the mobile device 7 is provided in contact with the movable frame 6. The linear motion guide 9 is fixed to, for example, a switch gear and the movable frame 6 is slid and used. When the linear motion guide 9 of the mobile device 7 is provided, the pantograph link mechanism does not need to be provided. For example, the moving configuration of the mobile device 7 is configured by a link configuration including only the right worm wheel link 3a and the connecting link 5a. It is possible. In the second embodiment, the same effect as in the first embodiment can be obtained, and it is possible to configure with a smaller number of parts.

Embodiment 3 FIG.
FIG. 12 is a partially enlarged view of the mobile device loading / unloading apparatus according to the third embodiment. Hereinafter, based on FIG. 12, the moving-in / out apparatus 50 according to Embodiment 3 will be described. The mobile device loading / unloading apparatus 50 according to the third embodiment is characterized in that the worm wheel link 3a is shifted from the worm wheel link 3b by a ½ lead pitch P, but the structure other than the feature is as follows. A structure similar to that of the first embodiment is provided.

When the worm wheel links 3a and 3b are arranged on both sides of the worm 2b, there is a shift in the engaging portion of the thread for half rotation due to the twist of the lead of the worm 2b. The arrangement of the worm wheel links 3a and 3b is shifted by ½ rotation, that is, ½ lead pitch P. That is, the rotation axis of the worm wheel link 3a provided on one side with the worm 2b interposed is shifted by a 1/2 lead pitch P of the worm 2b with respect to the rotation axis of the worm wheel link 3b provided on the other side. Arranged.
Accordingly, the connecting links 5a and 5b are also connected to the movable frame 6 with a ½ lead pitch P shifted, so that the same member can be used on the left and right, and the types of components can be reduced. At the same time, it is possible to provide a mobile device loading / unloading device 50 with high reliability, such as by making it possible to prevent wrong assembly by sharing the left and right members.

Embodiment 4 FIG.
FIG. 13A is a partial plan view of a mobile device loading / unloading apparatus according to Embodiment 4. FIG. 13B is a partial front view of the mobile device loading / unloading apparatus according to the fourth embodiment. In the first to third embodiments, the tooth portions of the worm wheel portions 3c and 3d of the worm wheel links 3a and 3b are three-dimensional curved worm wheels. However, in the fourth embodiment, the worm wheel portions 3c and 3d are used. The tooth portion is constituted by a spur gear 10 having a two-dimensional shape instead of a three-dimensional curved surface shape.
When the worm wheel portions 3c and 3d are formed thin, such as when formed by sheet metal processing, interference other than the normal transmission contact surface due to the lead angle twist of the worm 2b is possible even if the spur gear shape is used instead of the worm wheel shape. Since it can be avoided, the spur gear 10 that can be made by an inexpensive processing method such as press processing or laser processing can be used, so that the mobile device loading / unloading device 50 that is cheaper and suitable for mass production can be used. Can provide.

Embodiment 5. FIG.
In the mobile device loading / unloading device 50 according to the first to fourth embodiments, the surface hardness of the worm wheel links 3a and 3b of the worm wheel links 3a and 3b is configured to be lower than the surface hardness of the screw portion of the worm 2b. Yes.

When using with a large thrust, the surface hardness of the worm wheel portions 3c and 3d is lower than the surface hardness of the worm 2b, so that a larger operation can be performed without causing damage or breakage due to galling (burn-in) or the like. A mechanism capable of withstanding the force and generating a large propulsive force can be configured compactly.
When the worm wheel portions 3c and 3d are used under a large surface pressure that causes the plastic contact deformation beyond the elastic deformation region, the worm wheel portions 3c and 3d are provided before the contact surface of the worm 2b. By being plastically deformed and recessed along the shape of the contact portion with the worm 2b, the initial point contact state is expanded to the surface contact through the line contact. As a result, a mechanism capable of withstanding a larger operating force and generating a large thrust without causing damage or breakage due to galling or the like can be configured in a compact manner.

In the mobile device loading / unloading device 50 according to the second to fifth embodiments, the same reduction ratio (force ratio) change as that of the first embodiment shown in FIG. 10 is shown. Therefore, the mobile device loading / unloading apparatus 50 according to the second to fifth embodiments can be operated with a small number of rotations without waste.
In the above-described first to fifth embodiments, the case where the present invention is applied to an electrical device that can be pulled out in the switchgear has been described. However, the application target is not limited to the electrical device, and is viewed from the operation position. The mobile device loading / unloading device 50 disclosed in the first to fifth embodiments of the present application can be applied as long as it is moved in the front-rear direction.
Although this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may be applied to particular embodiments. The present invention is not limited to this, and can be applied to the embodiments alone or in various combinations.
Accordingly, countless variations that are not illustrated are envisaged within the scope of the technology disclosed herein. For example, the case where at least one component is deformed, the case where the component is added or omitted, the case where the at least one component is extracted and combined with the component of another embodiment are included.

1 housing, 2 worm gear, 2a operation shaft, 2b worm, 3a, 3b worm wheel link, 3c, 3d worm wheel part, 4a, 4b pin, 5a, 5b connection link, 5c, 5d connection pin, 6 movable frame, 6a through Hole, 6b Throw hole, 7 Moving device, 8 Fixed side lock member, 9 Linear motion guide, 10 Spur gear, 50 Moving device loading / unloading device

Claims (8)

1. A frame on which the device to be moved is placed;
   While supporting the frame movably at one end, a link having a worm wheel portion formed at the other end,
   A worm that meshes with the worm wheel portion of the link and rotates the worm wheel portion;
   A moving device loading / unloading apparatus comprising: a rotating means coupled to an operating shaft of the worm and rotating the worm wheel portion.
2. 2. The mobile device loading / unloading apparatus according to claim 1, wherein the links are provided on both sides of the worm, and constitute a pantograph link together with the frame.
3. 2. The moving equipment loading / unloading apparatus according to claim 1, wherein a linear motion guide for the moving equipment is provided on one side of the frame.
4. The rotating shaft of the link provided on one side is arranged with a ½ lead pitch shift of the worm with respect to the rotating shaft of the link provided on the other side. Item 3. The mobile device loading / unloading device according to Item 2.
5. 5. The mobile equipment loading / unloading apparatus according to claim 1, wherein the surface hardness of the worm wheel portion is lower than the surface hardness of the worm.
6. The moving device loading / unloading device according to any one of claims 1 to 5, wherein the worm wheel portion is constituted by a spur gear.
7. The mobile device according to any one of claims 1 to 6, wherein the device to be moved is any one of an electrical device such as a circuit breaker, a switch, a disconnector, and an instrument transformer. apparatus.
8. An electric device using the mobile device loading / unloading device according to any one of claims 1 to 6.

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