CN216122251U

CN216122251U - Motor starter

Info

Publication number: CN216122251U
Application number: CN202121738514.9U
Authority: CN
Inventors: 白继超; 肖体锋; 胡建国; 朱映平; 杨辉
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-03-22
Anticipated expiration: 2031-07-28

Abstract

The utility model provides a motor starter, includes the casing and sets up the operating device in the casing, operating device is last to be equipped with transmission portion, is equipped with the jack that corresponds with transmission portion on the casing, the jack is used for dodging external module, still includes portable setting and is in restriction piece on the casing, restriction piece include power portion and stop part, power portion with operating device cooperation, operating device drive motor starter disconnection or when closed drive restriction piece through power portion and remove, make the stop part on the restriction piece shelter from or dodge the jack through set up mobilizable restriction piece on the casing, makes operating device drive the restriction piece and shelter from the jack, can avoid external module to insert the mistake, effectively prevents external module and motor starter damage.

Description

Motor starter

Technical Field

The utility model relates to the field of low-voltage electric appliances, in particular to a motor starter.

Background

The motor starter is mainly used for protecting the motor, plays roles of protecting overload, short circuit, phase failure and the like and connecting or disconnecting a circuit, and is generally provided with an external module which can be assembled by a user, such as an auxiliary contact, an under-voltage release and the like, in order to expand the functions of a product. When the plug-in module is used, the plug-in module needs to penetrate through the jack on the shell of the electric starter and be inserted into the transmission groove of the operating mechanism in the shell, but the jack is usually larger than the transmission groove, the plug-in module is easily inserted into the outer side of the transmission groove after penetrating through the jack, the plug-in module and the motor starter can be damaged when the plug-in module is used, and serious economic loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a motor starter capable of preventing a plug-in module from being inserted wrongly.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a motor starter, includes the casing and sets up the operating device in the casing, operating device is last to be equipped with transmission portion, is equipped with the jack that corresponds with transmission portion on the casing, the jack is used for dodging external module, still includes portable setting and is in restriction piece on the casing, restriction piece include power portion and stop part, power portion with operating device cooperation, operating device drive motor starter disconnection or when closed drive restriction piece through power portion and remove, make the stop part on the restriction piece shelter from or dodge the jack.

Preferably, the operating mechanism comprises a rotatable transmission rod, a transmission groove matched with the plug-in module is formed in the transmission part, the transmission rod is driven to rotate when the operating mechanism drives the motor starter to be disconnected or closed, and the transmission rod drives the limiting part to shield or avoid the jack.

Preferably, a shielding part is arranged on one side, away from the blocking part, of the transmission rod and is used for shielding one end, away from the blocking part, of the jack.

Preferably, when the operating mechanism drives the motor starter to be disconnected, the transmission rod rotates to enable the blocking portion to avoid the jack, and the limiting piece is driven to move to enable the blocking portion to block one end of the jack; when the operating mechanism drives the motor starter to close, the transmission rod rotates to enable the shielding part to shield one end, far away from the blocking part, of the jack, and drives the limiting part to move to enable the blocking part to avoid the jack.

Preferably, be equipped with the base in the casing, be equipped with the hole of dodging that corresponds with the jack on the base, the restriction piece slidable mounting is on the base.

Preferably, a guide plate is arranged on one side of the power part, and a guide groove in sliding fit with the guide plate is arranged on the base; the guide plate is connected with the power part through a vertical sliding plate, a sliding groove in sliding fit with the sliding plate is arranged on the base, and the guide groove is arranged in the sliding groove.

Preferably, the power part comprises a top plate and a bottom plate which are oppositely arranged, and side plates which are respectively connected between two ends of the top plate and two ends of the bottom plate, and the blocking part is connected with the bottom of the bottom plate; the transmission rod is provided with a transmission part inserted into the inner side of the power part, and the transmission part can respectively push the top plate and the bottom plate from the inner side to drive the limiting part to move.

Preferably, the transmission part is provided with a shielding part at one side close to the top plate.

Preferably, the transmission rod further comprises a pivot part, an action part and a driving part, the action part, the driving part and the transmission part are respectively connected with the pivot part, the action part is connected with the torsion spring, the driving part can drive the transmission rod to rotate around the pivot part, and the moving contact is driven to move by the action part driving pressure plate when the transmission rod rotates.

Preferably, the device is also provided with an external module, a linkage rod of the external module penetrates through the jack to be matched with a transmission part of the operating mechanism, and the external module is an auxiliary contact or an under-voltage release.

According to the motor starter, the movable limiting piece is arranged on the shell, so that the operating mechanism drives the limiting piece to shield the jack, the plug-in error of the plug-in module can be avoided, and the plug-in module and the motor starter are effectively prevented from being damaged.

Drawings

FIG. 1 is a schematic structural view of a motor starter and a plug-in module of the present invention;

FIG. 2 is a schematic structural diagram of the plug-in module of the present invention;

FIG. 3 is a schematic structural view of a motor starter housing of the present invention;

FIG. 4 is an exploded view of the motor starter housing of the present invention;

FIG. 5 is a schematic view of the base and limiter of the present invention in combination;

FIG. 6 is an enlarged view of a portion of FIG. 5 of the present invention;

FIG. 7 is a schematic structural view of a restraint according to the present invention;

FIG. 8 is a schematic view of the engagement of the limiter of the present invention with the linkage shaft and the transmission rod, respectively;

FIG. 9 is a cross-sectional view of the motor starter and the plug-in module of the present invention in the disconnected state;

FIG. 10 is an enlarged fragmentary view of FIG. 9 of the present invention;

FIG. 11 is a cross-sectional view of the motor starter and the plug-in module of the present invention in a closed state;

fig. 12 is an enlarged view of a portion of fig. 11 of the present invention.

Detailed Description

The following further describes an embodiment of the motor starter according to the present invention with reference to the embodiments shown in fig. 1 to 12. The motor starter of the present invention is not limited to the description of the following embodiments.

As shown in fig. 3 to 6, the motor starter of the present invention includes a housing 1 and an operating mechanism disposed in the housing 1, wherein the operating mechanism is provided with a transmission portion 30, the housing 1 is provided with a jack 10 corresponding to the transmission portion 30, the jack 10 is used for avoiding an external module, the motor starter further includes a limiting member 4 movably disposed on the housing 1, the limiting member 4 includes a power portion 41 and a blocking portion 42, the power portion 41 is matched with the operating mechanism, and the operating mechanism drives the limiting member 4 to move through the power portion 41 when the operating mechanism drives the motor starter to open or close, so that the blocking portion 42 on the limiting member 4 blocks and avoids the jack 10.

According to the motor starter, the movable limiting piece 4 is arranged on the shell 1, so that the operating mechanism drives the limiting piece 4 to shield the jack 10, the plug-in module can be prevented from being inserted wrongly, and the plug-in module and the motor starter are effectively prevented from being damaged.

Referring to fig. 1-3, the plug-in module of the present embodiment is an auxiliary contact 5, the plug-in module may also be other plug-in modules such as an under-voltage release, and the auxiliary contact 5 is provided with a linkage rod 50, and the linkage rod 50 of the plug-in module passes through the jack 10 to be matched with the transmission portion 30 of the operating mechanism. Preferably, the operating mechanism includes a rotatable transmission rod 3, the transmission portion 30 is disposed at one end of the transmission rod 3, a transmission slot 31 is disposed on the transmission portion 30, the linkage rod 50 passes through the insertion hole 10 and is inserted into the transmission slot 31 on the operating mechanism, when the operating mechanism drives the motor starter to open or close, the transmission rod 3 is driven to rotate, the transmission rod 3 drives the linkage rod 50 to drive the auxiliary contact 5 to move through the transmission slot 31, the insertion hole 10 is larger than the inner diameter of the transmission slot 31, so as to prevent the linkage rod 50 from being blocked, but also to cause the linkage rod 50 to be easily inserted incorrectly, if the transmission slot 31 moves to one end of the insertion hole 10 along with the rotation of the transmission rod 3, the linkage rod 50 is inserted at this time, the linkage rod 50 is easily inserted to the outer side of the transmission slot 31, that is, the end of the insertion hole 10 is far away from the transmission slot 31, in this embodiment, the limiting member 4 can be driven by the transmission rod (3), when the operating mechanism drives the motor starter to be disconnected or closed, the driving rod 3 is driven to rotate, the driving rod 3 drives the limiting part 4 to shield or avoid the jack 10, and when the driving groove 31 moves to one end of the jack 10, the limiting part 4 blocks the outer side of the driving groove 31, so that the linkage rod 50 can only be inserted into the driving groove 31. It is understood that the limiting member 4 may also completely block the insertion hole 10, for example, block the insertion hole 10 when closing, prevent the operation of the starter of the motor, and the like, and all fall within the protection scope of the present invention.

As shown in fig. 3 to 5, a base 13 is disposed in the housing 1, a relief hole 14 corresponding to the insertion hole 10 is disposed on the base 13, and the limiting member 4 is slidably mounted on the base 13. Casing 1 of this embodiment is equipped with base 13 between 11 and inferior valve 12 at last casing 11 including relative epitheca and the inferior valve 12 that sets up, and the epitheca 11 covers base 13 with inferior valve 12 from the upper and lower side respectively, and most parts in the motor starter all install on base 13, are equipped with half first hole and half lower hole of U type respectively on last casing 11 and inferior valve 12, and half first hole can constitute with half lower hole jack 10, be equipped with the hole of dodging 14 that corresponds with jack 10 on

base

13, 4 slidable mounting of restriction spare is on base 13. It is understood that the limiting member 4 can be slidably mounted on the inner wall of the upper shell 11 or the lower shell 12, and the utility model is not limited thereto.

As shown in fig. 7-8, the specific structure of the limiting member 4 is shown, the power portion 41 of the limiting member 4 of this embodiment is in a "square" shape, the power portion 41 includes a top plate 411 and a bottom plate 412 which are arranged opposite to each other, and side plates 413 which are respectively connected between two ends of the top plate 411 and the bottom plate 412, the blocking portion 42 is connected to the bottom of the bottom plate 412, the linkage rod 50 and the transmission rod 3 respectively extend to the inner side of the power portion 41, and the transmission rod 3 can respectively push the top plate 411 and the bottom plate 412 from the inner side, so as to drive the limiting member 4 to move upward and downward.

The limiting piece 4 of the embodiment has better balance through the power part 41 adopting the square-shaped structure, and the up-and-down reciprocating motion is driven by the transmission rod 3 without arranging additional parts such as springs and the like to drive the limiting piece 4 to reset. Of course, the limiting member 4 may have other shapes, such as an "L" shape and a "C" shape, in which only one side plate 413 is provided, and the like, and the utility model is within the protection scope of the present invention.

Further, a guide plate 43 is disposed on one side of the power portion 41, the guide plate 43 is connected to the power portion 41 through a vertical sliding plate 44, a sliding groove 440 slidably engaged with the sliding plate 44 is disposed on the base 13, and a guide groove 430 slidably engaged with the guide plate 43 is disposed in the sliding groove 440. Through slide 44 and the sliding fit of spout 440, and deflector 43 and guide way 430 slip, can guide the direction of motion of restriction spare 4, prevent that restriction spare 4 from appearing the jamming scheduling problem and then influencing operating device. It is understood that the guide plate 43 and the sliding plate 44 may not be provided, the sliding slot 440 of the base 13 may be directly slidably engaged with the power unit 41, or only the sliding plate 44 may be provided without the guide plate 43, which falls within the protection scope of the present invention.

As shown in fig. 8 to 12, in this embodiment, not only the limiting member 4 can shield the jack 10, but also the shielding portion 32 for shielding the jack 10 is provided on the operating mechanism, the shielding portion 42 is located on one side of the driving rod 3, the shielding portion 32 is provided on one side of the driving rod 3 away from the shielding portion 42, and the shielding portion 32 is used for shielding one end of the jack 10 away from the shielding portion 42. Fig. 9-10 show the disconnected state of the motor starter, after the operating mechanism drives the motor starter to disconnect, the transmission slot 31 corresponds to the top of the insertion hole 10, and the blocking portion 42 of the limiting member 4 blocks the bottom of the insertion hole 10 to prevent the linkage shaft 50 from being inserted out of the transmission slot 31; fig. 11 to 12 show a closed state of the motor starter, after the operating mechanism drives the motor starter to close, the transmission slot 31 corresponds to the bottom of the jack 10, but the blocking portion 42 of the limiting member 4 is located below the blocking jack 10, and the jack 10 cannot be blocked by the blocking portion 42, but the blocking portion 32 arranged on the operating mechanism can block the top of the jack 10, so as to prevent the linkage shaft 50 from being inserted outside the transmission slot 31, and ensure that the linkage shaft 50 can only be inserted into the transmission slot 31.

The bottom that jack 10 was sheltered from to the portion 42 that blocks through restriction piece 4 in this embodiment to shelter from the top of jack 10 through the shielding portion 32 on the operating device, shelter from the both ends at jack 10 bottom and top through restriction piece 4 and operating device cooperation, incompletely shelter from jack 10 through restriction piece 4, not only have simple structure and the characteristics of convenient assembly, but also can avoid interfering with other parts, guarantee not to increase motor starter's volume. Referring to the open state shown in fig. 10, if the blocking portion 42 of the restriction member 4 is integrally formed on the transmission portion 30 of the transmission lever 3, and the transmission lever 3 rotates to the closed position of fig. 12, the blocking portion 42 swings downward and rightward and interferes with the contact holder 40 for fixing the movable contact, which changes the structure of the conventional motor starter, resulting in a decrease in reliability. Referring to the off state shown in fig. 10, the shielding portion 32 of the driving lever 3 has both functions of pushing the limiting member 4 and shielding the insertion hole 10, and the difficulty of assembly is increased if the shielding portion 32 is not provided.

As shown in the figures, the operating mechanism of the present embodiment includes a lever 21, a connecting rod 22, a trip 23, a latch 24 and the transmission rod 3, which are respectively rotatably installed, the transmission rod 3 includes a rotatable pivot 33, and an action portion 34, a driving portion 35 and a transmission portion 30, which are respectively connected to the pivot 33, the action portion 34 is connected to a torsion spring 36, the transmission groove 31 is disposed on the transmission portion 30, the driving portion 35 is provided with a driving groove 37, which is engaged with the trip 23, the trip 23 drives the transmission rod 3 to rotate around the pivot 33 by pushing a groove wall of the driving groove 37, the transmission rod 3 drives a pressing plate 38 to drive a movable contact 39 to move by the action portion 34 when rotating, the transmission groove 31 is disposed on the transmission portion 30, the transmission portion 30 can respectively push the top plate 411 and the bottom plate 412 from inside to drive the limiting member 4 to move, a shielding portion 32 is disposed on a side of the transmission portion 30 close to the top plate 411, the shielding portion 32 is in contact fit with the top plate 411, and the shielding portion 32 can not only push the top plate 411 to drive the limiting member 4 to move, but also shield one end of the insertion hole 10 far away from the blocking portion 42.

Fig. 9 shows the open state of the motor starter, and the process from the open state to the closed state is as follows:

the clockwise rotating handle 25 drives the lever 21 to rotate clockwise around the second rotating shaft B, when the lever 21 rotates, the connecting rod 22 pushes the trip 23 to rotate clockwise around the point C, when the trip 23 rotates, the fixed shaft D on the trip is driven to slide in the driving groove 37 of the transmission rod 3, and the groove wall of the driving groove 37 is pushed to drive the transmission rod 3 to rotate around the first rotating shaft a on the pivoting part 33, when the transmission rod 3 rotates, the driving part 34 is driven to lift up, after the pressure of the pressing plate 38 loses the pressure of the driving part 34, the pressing plate moves upwards under the action of the reaction spring 41, the moving contact is contacted with the static contact, and the motor starter is closed.

Fig. 10 shows a closed state of the motor starter, and the process from the closed state to the open state is as follows:

when the starter encounters overload or short-circuit current, the latch 24 is forced to rotate around the fourth rotating shaft G counterclockwise, the latch 24 and the jump buckle 23 are changed from an original lap joint state to a disengaged state, the jump buckle 23 rotates around the fixed shaft D counterclockwise, the action part 34 of the transmission rod 3 rotates around the first rotating shaft a clockwise under the driving of the torsion spring 36, the transmission rod 3 pushes the fixed shaft D to move upwards, the lever 21 and the connecting rod 22 move to the position of the motor disconnection state, the action part 34 of the transmission rod 3 presses the pressing plate 38 to move downwards, and the contact support 40 is pushed to drive the movable contact 39 to be separated from the fixed contact.

It can be understood that there are various embodiments of the operating mechanism, and in this embodiment, the driving rod 3 of the operating mechanism is directly utilized, other parts of the operating mechanism may also be utilized, or an additional independent connecting rod may also be provided, so that the independent connecting rod is matched with any one of the connecting rods in the operating mechanism, and when the operating mechanism acts, the independent connecting rod drives the limiting member 4 to move, which all belong to the protection scope of the present invention.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. The utility model provides a motor starter, includes casing (1) and sets up the operating device in casing (1), operating device is last to be equipped with transmission portion (30), is equipped with jack (10) that correspond with transmission portion (30) on casing (1), jack (10) are used for dodging external module, its characterized in that: the limiting part (4) is movably arranged on the shell (1), the limiting part (4) comprises a power part (41) and a blocking part (42), the power part (41) is matched with the operating mechanism, and the limiting part (4) is driven to move through the power part (41) when the operating mechanism drives the starter of the motor to be opened or closed, so that the blocking part (42) on the limiting part (4) shields or avoids the jack (10).

2. The motor starter of claim 1 wherein: the operating mechanism comprises a rotatable transmission rod (3), a transmission groove (31) matched with the plug-in module is formed in the transmission part (30), the transmission rod (3) is driven to rotate when the operating mechanism drives the starter of the motor to be disconnected or closed, and the transmission rod (3) drives the limiting part (4) to shield or avoid the jack (10).

3. The motor starter of claim 2 wherein: a shielding part (32) is arranged on one side, away from the blocking part (42), of the transmission rod (3), and the shielding part (32) is used for shielding one end, away from the blocking part (42), of the jack (10).

4. A motor starter as set forth in claim 3 wherein: when the operating mechanism drives the motor starter to be disconnected, the transmission rod (3) rotates to enable the shielding part (32) to avoid the jack (10), and drives the limiting part (4) to move to enable the blocking part (42) to shield one end of the jack (10); when the operating mechanism drives the motor starter to close, the transmission rod (3) rotates to enable the shielding part (32) to shield one end, far away from the blocking part (42), of the jack (10), and drives the limiting part (4) to move to enable the blocking part (42) to avoid the jack (10).

5. The motor starter of claim 1 wherein: be equipped with base (13) in casing (1), be equipped with on base (13) and dodge hole (14) that correspond with jack (10), restrainer (4) slidable mounting is on base (13).

6. The motor starter of claim 5 wherein: a guide plate (43) is arranged on one side of the power part (41), and a guide groove (430) in sliding fit with the guide plate (43) is arranged on the base (13); the guide plate (43) is connected with the power part (41) through a vertical sliding plate (44), a sliding groove (440) in sliding fit with the sliding plate (44) is arranged on the base (13), and the guide groove (430) is arranged in the sliding groove (440).

7. The motor starter of claim 2 wherein: the power part (41) comprises a top plate (411) and a bottom plate (412) which are oppositely arranged, and side plates (413) which are respectively connected between two ends of the top plate (411) and the bottom plate (412), and the blocking part (42) is connected with the bottom of the bottom plate (412); the transmission rod (3) is provided with a transmission part (30) inserted into the inner side of the power part (41), and the transmission part (30) can push the top plate (411) and the bottom plate (412) to drive the limiting part (4) to move from the inner side.

8. The motor starter of claim 7 wherein: the transmission part (30) is provided with a shielding part (32) at one side close to the top plate (411).

9. The motor starter of claim 7 wherein: the transmission rod (3) further comprises a pivoting part (33), an action part (34) and a driving part (35), the action part (34), the driving part (35) and the transmission part (30) are respectively connected with the pivoting part (33), the action part (34) is connected with a torsion spring (36), the driving part (35) can drive the transmission rod (3) to rotate around the pivoting part (33), and the transmission rod (3) drives a pressing plate (38) to drive a moving contact (39) to act through the action part (34) when rotating.

10. The motor starter of claim 1 wherein: and an external module is also installed, a linkage rod (50) of the external module penetrates through the jack (10) to be matched with a transmission part (30) of the operating mechanism, and the external module is an auxiliary contact (5) or an undervoltage release.