WO2016154915A1

WO2016154915A1 - Rotary limiting device

Info

Publication number: WO2016154915A1
Application number: PCT/CN2015/075578
Authority: WO
Inventors: 杜北江; 杨长洲; 林大喜
Original assignee: Abb技术有限公司; 杜北江; 杨长洲; 林大喜
Priority date: 2015-03-31
Filing date: 2015-03-31
Publication date: 2016-10-06

Abstract

Provided is a rotary limiting device, comprising a housing (2), a support base (3) and a limiting disc (4), and further comprising a locking member (1) and a speed-reducing gear mechanism (5), wherein the limiting disc (4) and the speed-reducing gear mechanism (5) are mounted on the support base (3) and are placed in the housing (2); the limiting disc (4) is provided with a limiting disc locking unit (41); the housing (2) is provided with a housing locking unit (21); and the locking member (1) is used to lock the limiting disc locking unit (41) and the housing locking unit (21), so as to realize the rotary limiting of the speed-reducing gear mechanism (5) and in turn to realize the rotary limiting of an operating shaft. By means of the mechanical limiting of the rotary limiting device, an incorrect operation can be prevented. Further provided is a switch apparatus.

Description

Rotary limit device

Technical field

The invention belongs to the technical field of mechanical and electric power products, and particularly relates to a mechanism and a device for restricting movement in the mechanical field. More particularly, it relates to a device for limiting rotational motion, and to the field of gas or air-insulated switchgear for rotating limit operations of a switchgear, in particular a three-station switchgear.

Background technique

At present, for two or three stations with motor or even more stations, the position control usually sends the corresponding signal to the control system by the position sensor, and then the control system controls the rotation of the motor. Limit the position of the operating mechanism, ie the electrical limit. When the number of rotations of the motor is less than or equal to one revolution, the operating mechanism can easily achieve direct limitation on the motor shaft. However, when the number of rotation turns is large, the position sensor is required to assist the positioning, and it is difficult to achieve direct limitation in the driving shaft.

When the operating mechanism only has an electrical limit, if the electrical limit fails or an abnormality occurs, the operating mechanism may stop at the wrong position due to the absence of a mechanical limit, resulting in a serious accident. Take the three stations in the switchgear as an example. If it is stopped between two stations, powering up at this time may cause an arcing accident. In addition, in the manual operation state, if there is no mechanical limit, misunderstanding on the operating mechanism may result in misoperation, damage to the relevant operating mechanism or stop the mechanism in the wrong position, which may also cause serious consequences. At this time, on the basis of the existing operating mechanism, if the positioning of a certain mechanical mode can be increased to prevent various types of misjudgment and misoperation, the occurrence of the above events can be avoided.

Summary of the invention

The present invention provides a mechanical limit device for the shortcomings of the prior art electrical limit. It provides an effective mechanical limit for rotation. As a preferred embodiment of the invention, the use of a rotary stop device in an electrical field device is provided, particularly in a three station switch.

According to an aspect of the present invention, a rotation limiting device includes a housing, a support base, and a limit plate, and further includes a locking member and a reduction gear mechanism; the limit plate and the reduction gear mechanism are mounted on the support base, and The fixing plate is provided with a limiting plate locking unit; the housing has a housing locking unit; the locking member is used for locking the limit plate locking unit and the housing locking unit, thereby realizing the reduction gear mechanism The rotation limit is further achieved to achieve a rotation limit of the operating shaft that is in contact with the reduction gear mechanism.

According to a preferred embodiment of the present invention, the reduction gear mechanism includes: a driving shaft and a driving gear that drives the driving shaft; a driven shaft and a driven gear that drives the driven shaft; the driving gear is a single-toothed gear and a driven gear Cooperating, so that when the driving gear rotates one turn, the driven gear that cooperates with it rotates one tooth position.

According to a preferred embodiment of the invention, a driven gear anti-stall device is mounted on one side of the driven gear to ensure that the driven gear is rotated by only one tooth position at a time, driven by the driving gear.

The anti-stall device includes a guide groove, a bolt, a spring, and a ball, and the ball, the spring, and the bolt are sequentially fitted in a guide groove on the housing.

According to a preferred embodiment of the present invention, a limit slot on the limit disc; a limited position pin on the driven gear; the reduction gear mechanism and the limit disc are assembled such that the limit pin is adapted to slide in the limit slot The limiting slot limits the movement position of the limiting pin to both ends of the limiting slot, thereby limiting the rotation of the driven gear, thereby limiting the number of revolutions of the driving gear between two numerical ranges.

According to a preferred embodiment of the present invention, the housing locking unit includes a housing first locking unit and a second locking unit of the housing; the limiting plate locking unit on the limiting plate can be locked with the housing first locking unit and the second locking unit of the housing, respectively, thereby limiting the rotation of the driven gear, and thus Limit the rotation of the drive gear and the drive shaft.

When the first locking unit of the housing or the second locking unit of the housing and the limiting plate locking unit on the limiting plate, the movement position of the limiting pin is limited between the first end and the second end of the limiting groove.

According to a preferred embodiment of the invention, the limit plate locking unit is a mounting ear having a locking aperture for the locking member to pass through.

In accordance with a preferred embodiment of the present invention, the housing first locking unit and the housing second locking unit are lugs that each have a locking aperture for the locking member to pass through.

According to still another preferred embodiment of the present invention, the housing further includes a housing third locking unit for adjusting a limited range of the number of revolutions of the driving shaft.

According to a preferred embodiment of the invention, the locking member is a padlock or a pin.

In another aspect of the invention, there is provided a switch apparatus comprising the rotation limit device of any of the preceding claims for limiting a rotational operation of the switch operating handle.

The rotation limiting device of the invention is simple in design and convenient in operation, as long as the rotation limiting device of the invention is assembled with the original mechanism, the effective deceleration of the driving shaft is performed, and then the limiting position is realized on the auxiliary mechanism, thereby Provides a reliable mechanical limit function in addition to electrical limits.

DRAWINGS

1 is a schematic exploded view showing the first preferred embodiment of the rotation limiting device of the present invention;

2 is a schematic structural view of a reduction gear mechanism of a first preferred embodiment of the rotation limiting device of the present invention;

3A-3B are schematic structural views of the reduction gear mechanism and the limit plate of the first preferred embodiment of the rotation limiting device of the present invention; wherein, FIG. 3A is a front view, and FIG. 3B shows the internal structure from the back, and Mounted on the housing;

4A-4B are schematic views of the first preferred embodiment of the rotation limiting device of the present invention, applied to different locking positions of the three-position switch, wherein FIG. 4A is a schematic diagram of the three-position switch in an isolation-ground locking position, FIG. 4B Is a schematic diagram of the three-position switch in the isolation-on-lock position;

5A-5B are schematic views of other preferred embodiments of the rotation limiting device of the present invention, wherein FIG. 5A shows a schematic view of the third locking unit on the housing, and FIG. 5B shows a schematic view of the locking member as a pin structure. .

detailed description

A detailed description of alternative embodiments of the present invention is given below with reference to the accompanying drawings.

1 is a schematic exploded view of a first preferred embodiment of a rotation limiting device according to the present invention; the rotation limiting device of the present invention includes a locking member 1, a housing 2, a support base 3, a limit plate 4, and a reduction gear The mechanism 5; the limiting plate 4 and the reduction gear mechanism 5 are mounted on the support base 3 and placed in the casing 2; the limit plate 4 is provided with a limit plate locking unit 41; and the casing 2 has a casing lock The locking member 1 is used for locking the limit plate locking unit 41 and the housing locking unit 21, thereby realizing the rotation limit of the reduction gear mechanism 5, thereby achieving connection with the reduction gear mechanism 5 The operating shaft can be a manually operated shaft or a rotational limit of the electric operating shaft.

2 is a schematic structural view of a reduction gear mechanism of a first preferred embodiment of the rotation limiting device of the present invention; in operation, the driving shaft 54 of the auxiliary mechanism is coupled to a shaft that requires a limit. The reduction gear mechanism 5 includes a drive shaft 54 and a drive gear 51 that drives the drive shaft 54; a driven shaft 55 and a driven gear 52 that drives the driven shaft 55; the drive gear 51 is a single-toothed gear And cooperate with the driven gear 52, so that when the driving gear 51 makes one rotation, the driven gear 52 engaged with it rotates one tooth position.

3A-3B are schematic structural views of the reduction gear mechanism and the limit plate of the first preferred embodiment of the rotation limiting device of the present invention; wherein, FIG. 3A is a front view, and FIG. 3B shows the internal structure from the back, and Assembled on the housing. As shown in FIGS. 3A and 3B, a driven gear 52 anti-stall device 53 is mounted on one side of the driven gear 52 to ensure that the driven gear 52 is rotated by only one tooth position at a time under the driving of the driving gear 51. The anti-stall device 53 includes a guide groove 24, a bolt 531, a spring 532, and a ball 533. As shown in FIG. 3B, the guide groove 24 is opened on the casing 2. In operation, the ball 533, the spring 532 and the bolt 531 are sequentially loaded into the guide groove 24, and the ball is pressed into the tooth surface of the driven gear 52 with a certain pressure by adjusting the screw screwing depth, so that when the driven gear 52 rotates enough torque When the ball 533 is pressed back into the guide groove, the driven gear 52 can rotate. When the rotational torque of the driven gear 52 becomes smaller, the ball 533 will be pushed back and pressed against the driven gear 52 by the spring force. The tooth surface limits the rotation of the driven gear 52, thereby ensuring that the driven gear 52 can only rotate tooth by tooth.

As shown in FIGS. 3A-3B, the limit plate 4 has a limited position groove 46; the driven gear 52 has a limited position pin 521; the reduction gear mechanism 5 and the limit plate 4 are assembled such that the limit pin 521 is adapted to Sliding in the limiting slot 46; the limiting slot 46 limits the moving position of the limiting pin 521 between the two

ends

461, 462 of the limiting slot 46, thereby limiting the rotation of the driven gear 52, and thus the driving gear The number of revolutions of 51 is limited to between two numerical ranges.

The housing locking unit includes a housing first locking unit 21 and a housing second locking unit 22; the limiting disk locking unit 41 on the limiting disk 4 can be respectively coupled with the housing first locking unit 21 and the housing second The locking unit 22 is locked by the locking member 1 to restrict the rotation of the driven gear 52, thereby restricting the rotation of the driving gear 51 and the driving shaft 55.

The position of movement of the limit pin 521 on the driven gear 52 is limited to the limit groove 46. Regardless The first locking unit 21 of the limiting plate locking unit 41 is aligned and locked, or when the limiting plate locking unit 41 is just aligned with the second locking unit 22 of the housing and locked, the movement of the limiting pin 521 in the limiting slot 46, It is limited by the first end 461 and the second end 462 of the limiting slot 46.

Therefore, when the first disk locking unit 21 of the limiting disk locking unit 41 is aligned and locked, as shown in FIG. 4A, the movement of the limiting pin 521 between the first end 461 and the second end 462 of the limiting groove 46 is performed. Corresponding to the number of teeth of the range of the driven gear 52 (recorded as the first range). The rotation of the drive shaft is limited to between 0 and n turns, where the value of n is determined by the number of teeth of the driven gear and the length of the limit groove, which can be adjusted as needed, and n is not limited to just an integer.

When the second locking unit 22 of the limiting plate locking unit 41 is aligned and locked, as shown in FIG. 4B, the movement of the limiting pin 521 between the first end 461 and the second end 462 of the limiting groove 46 corresponds to The number of teeth in the other range of the driven gear 52 (recorded as the second range). The rotation of the drive shaft is limited to between n and 2n revolutions.

The invention further describes the use of the aforementioned rotation limiting device in a switching device. The switchgear of the present invention includes a three-position switch, and any of the above-described rotation limit devices. The rotation limit device is used to limit the rotation operation of the operating shaft of the three-position switch. The operating shaft can be a manually operated shaft or an electric operating shaft. When the operation shaft rotation is limited, the operation shaft cannot be further rotated, and the reduction gear mechanism is inserted into the other side of the operation shaft, and the driven switch spindle is also limited.

The following describes the rotation limit of the three-position switch operation by using the rotation limiting device of the present invention, thereby ensuring the normal operation of the three-position switch.

The three states of the three-position switch are: ground, isolated, and connected. To ensure the normal operation of the three-position switch, it is necessary to ensure that the three-position switch can only switch back and forth between grounding and isolation at any time, or can only switch back and forth between the two states of isolation and connection. Grounding and connection It is not possible to switch directly between the ports, and it is not possible to switch between the three states. Applying the rotation limiting device of the present invention to the three-position switch can ensure the normal operation of the three-position switch as described above.

The rotation limiting device of the present invention is applied to a three-position switch. When the driving shaft 54 rotates one turn, the driven gear 52 rotates only one tooth position. When the drive shaft rotates 23 times, the three-position switch is switched from one station to another. At this time, the driven gear 52 is driven to rotate 23 teeth, and the limit pin 521 on the limit pin is supported by the limit plate. The limiting slot 46 on the 4 is blocked so that it can no longer continue to rotate forward, and only 0 to 23 revolutions can be made along the limiting slot 46. Among them, the value of 23 turns is determined by the number of teeth of the driven gear 52 and the length of the limit groove 46, and can be adjusted according to needs, and in the product design, a suitable gear is selected to design a matching limit groove.

As shown in FIG. 4A, the limit locking unit 41 on the limiting plate 41 and the first locking unit 21 of the housing are locked by the locking member 1. At this time, the 521 on the gear 52 is limited by the limiting slot 46 and can only be limited. The first end 461 and the second end 462 of the bit groove 46 rotate. The rotation of the drive shaft is limited to 0 to 23 turns. The value is determined by the number of driven gears and the length of the limit groove, which can be adjusted as needed. At this time, the three-station can only work between the grounded and isolated states. Therefore, the three-position switch can only be grounded to the isolated state, or from the isolated to the grounded state.

As shown in FIG. 4B, when the second locking unit 22 of the limiting plate locking unit 41 is aligned and locked, the movement of the limiting pin 521 between the first end 461 and the second end 462 of the limiting slot 46 is active. The rotation of the shaft is limited to between 23 and 46 revolutions. At this time, the three-position switch can only work between the two states of the isolation bit and the on-position. Therefore, the three-position switch can only be turned on to the isolated state, or from the isolated to the on state.

The above description of the principle of FIG. 4A-4B clearly shows the rotation limit of the three-station switch, thereby ensuring the normal operation of the three-position switch.

According to a preferred embodiment of the present invention, the limit plate locking unit 41 is a mounting ear having a locking hole 411 for the locking member 1 to pass therethrough.

The housing first locking unit 21 and the housing second locking unit 22 are also lugs, which respectively have locking

holes

211, 221 for the locking member 1 to pass through.

There are still more other preferred embodiments of the rotation limiting device of the present invention. As shown in FIG. 5A, the housing 2 further includes a housing third locking unit 23, and the third locking unit 23 can be located, for example, (1/2). The intermediate locking position of n to (3/2) n turns is used to adjust and increase the limited range of the number of revolutions of the driving shaft 55. For example, when more locking positions are required, especially in other equipment in the mechanical field.

In accordance with a preferred embodiment of the present invention, as shown in Figures 1-3B, the locking member 1 is a padlock. According to still another preferred embodiment of the present invention, as shown in Fig. 5B, the locking member is a pin 1'.

According to other preferred embodiments of the present invention, the locking member and the housing first locking unit may be male and female devices that can be interlocked or latched, that is, both can achieve reliable locking. The same applies to the locking member and the housing second locking unit, which have more housing locking units. The drawings of still further embodiments are not further shown in the present invention.

Advantages of the rotation limit device of the present invention:

The rotation limiting device of the invention has the advantages of simple design and convenient operation, as long as the rotation limiting device of the invention is assembled with the original mechanism, and the effective reduction of the driving shaft, that is, the deceleration of the original mechanism, the reduction ratio For the driven gear ratio, the deceleration efficiency is high, and then the limit is fixed on the auxiliary mechanism, thereby providing a reliable mechanical limit function in addition to the electrical limit, thereby greatly improving the reliability and safety of the mechanism. By adjusting the number of gear teeth, the length of the limit groove, the limit position of the limit plate and the housing, if the mechanism size itself is not required, for the rotation The rotation limit of the mechanism can be limited from zero to any number of figures.

As a preferred embodiment of the invention, the use of a rotary stop device in the electrical field is provided, particularly in a three-position switch. However, the rotation limiting device of the present invention can also perform a good rotation limit function in other devices in the mechanical field. Therefore, the scope of protection of the present invention is not limited to the electrical field.

While the invention has been described with respect to the preferred embodiments and the embodiments of the invention Retouching. Therefore, the invention should not be limited by the description of the preferred embodiments and the accompanying drawings, and the scope of the invention is defined by the scope of the appended claims.

Claims

A rotation limiting device comprises a casing (2), a support base (3) and a limit plate (4), characterized in that it further comprises a locking member (1, 1') and a reduction gear mechanism (5);

The limiting plate (4) and the reduction gear mechanism (5) are mounted on the support base (3) and placed in the housing (2);

The limit plate (4) is provided with a limit plate locking unit (41); the housing (2) has a housing locking unit (21, 22);

The locking member (1, 1') is used for locking the limit plate locking unit (41) and the housing locking unit (21), thereby realizing the rotation limit of the reduction gear mechanism (5), thereby achieving the The rotation limit of the operating shaft to which the reduction gear mechanism (5) is connected.
The rotation limiting device according to claim 1, wherein the reduction gear mechanism (5) comprises:

a drive shaft (54) and a drive gear (51) that drives the drive shaft (54);

a driven shaft (55) and a driven gear (52) that drives the driven shaft (55);

The driving gear (51) is a single-toothed gear and cooperates with the driven gear (52) such that when the driving gear (51) makes one rotation, the driven gear (52) that cooperates with it rotates one tooth position.
The rotation limiting device according to claim 2, wherein a driven gear (52) anti-stall device (53) is mounted on one side of the driven gear (52) to ensure the driven gear (52) Only one tooth position is rotated at a time under the driving of the driving gear (51).
A rotation limiting device according to claim 3, wherein: said loss prevention The speed device (53) includes a bolt (531), a spring (532) and a ball (533); the ball (533), the spring (532) and the bolt (531) are sequentially fitted to the guide groove on the casing (2) (24) inside.
The rotation limiting device according to any one of claims 1 to 4, characterized in that: the limiting plate (4) has a limited position groove (46); and the driven gear (52) has a limited position pin ( 521); the reduction gear mechanism (5) and the limit plate (4) are assembled such that the limit pin (521) is adapted to slide in the limit groove (46); the limit groove (46) will be limited The moving position of the pin (521) is limited between the two ends (461, 462) of the limiting groove (46), thereby restricting the rotation of the driven gear (52), thereby limiting the number of revolutions of the driving gear (51) to Between two numerical ranges.
A rotation limiting device according to claim 5, wherein said housing locking unit comprises a housing first locking unit (21) and a housing second locking unit (22); said limiting plate (4) The upper limit disk locking unit (41) can be locked with the housing first locking unit (21) and the housing second locking unit (22) with the locking member (1, 1'), thereby restricting the driven gear ( The rotation of 52), in turn, limits the rotation of the drive gear (51) and the drive shaft (55).
The rotation limiting device according to claim 6, wherein the housing first locking unit (21) or the housing second locking unit (22) and the limiting plate locking unit on the limiting plate (4) (41), the movement position of the limit pin (521) is limited between the first end (461) and the second end (462) of the limit groove (46).
A rotation limiting device according to any one of claims 1 to 4, characterized in that: The limit plate locking unit (41) is a mounting ear having a locking hole (411) for the locking member (1, 1') to pass through.
The rotation limiting device according to any one of claims 1 to 4, wherein the housing first locking unit (21) and the housing second locking unit (22) are mounting ears, and the locking holes are respectively included on the housing. (211, 221) for the locking member (1, 1') to pass through.
The rotation limiting device according to claim 6, wherein the housing (2) further comprises a housing third locking unit (23) for adjusting a limited range of the number of rotations of the driving shaft (55).
A rotation limiting device according to any one of claims 1 to 4, characterized in that the locking member is a padlock (1) or a pin (1').
A switch device comprising the rotation limiting device of any one of claims 1-11 for limiting a rotational operation of a switch operating handle.