CN216624020U - Operating mechanism for controlling and protecting switch electric appliance - Google Patents

Abstract

The utility model provides an operating mechanism for controlling and protecting a switching device, which comprises: overload cam and overload push rod, overload push rod be equipped with the cooperation piece of driving block complex, the cooperation piece has first cooperation portion and the second cooperation portion that is close to respectively and keeps away from overload cam rotation center and sets up, detains the in-process again, second cooperation portion is prior to first cooperation portion and driving block contact. Utility model human ingenious increased second cooperation portion on the basis of former first cooperation portion, detain the in-process again, overload cam clockwise rotation, the drive block earlier with the contact of second cooperation portion, drive overload push rod removes after the certain distance, contact with first cooperation portion again, thereby continue drive overload push rod and remove, compare among the prior art, the stroke is detained again of overload push rod has been increased like this, and because overload push rod's whole length keeps unchangeable, thereby it does not have the influence to detain the volume, avoid taking place the thread slipping, detain again/the qualification rate that resets and promote by a wide margin, the characteristic of product has obtained optimizing by a wide margin.

Description

Operating mechanism for controlling and protecting switch electric appliance

Technical Field

The utility model relates to the technical field of control and protection switching devices of low-voltage electric appliances, in particular to an operating mechanism of the control and protection switching device.

Background

The Control and protection switching device (or called Control protector) is a novel product in low-voltage electrical appliances, the product category code number of the Control and protection switching device is CPS, and the product category code number is an abbreviation of English Control and Protective switching device. The CPS can realize integrated and internal coordination control and protection functions on a product with a single structure form, and can replace a plurality of traditional discrete components such as a circuit breaker (fuse), a contactor, an overload (or overcurrent and open-phase) protection relay, a starter, an isolator and the like.

As shown in fig. 11 and 12, the operating mechanism of the conventional control and protection switching device mainly includes a central cam 01, an overload cam 02, a first stopper 03, an overload push rod 04, a release 06, and a fault push rod 08. The tripping process of the operating mechanism is as follows: in a normal state, the first stop 03 is in snap fit with the overload cam 02, and when the release 06 detects that parameters such as voltage, current and the like in a circuit exceed a set value, a trip signal is sent, the fault push rod 08 of the release 06 moves forward to drive the overload push rod 04 to overcome the elastic force of the first stop spring and the friction force in the movement process, so as to drive the first stop 03 to rotate anticlockwise, the buckling amount of the first stop 03 and the overload cam 02 is continuously reduced along with the increase of the rotation angle of the first stop 03, and when the buckling amount is 0 (also called as 'through dead point'), the overload cam 02 moves anticlockwise through the pulling force of a tripping tension spring on the overload cam 02, the overload cam 02 further drives the central cam 01 to move anticlockwise in the movement process, and a series of tripping linkages of the operating mechanism are used to cut off a main loop. After a professional removes a circuit fault, the professional needs to rotate the handle anticlockwise to perform re-buckling operation so that the central cam 01, the overload cam 02, the overload push rod 04, the tripper 06, the fault push rod 08 and the like of the operating mechanism are restored to energy storage positions before tripping, and the re-buckling process is as follows: the handle drives the central cam 01 to rotate anticlockwise, the central cam 01 drives the overload cam 02 to rotate clockwise through the matching surface, after the overload cam 02 returns to the buckling amount of 0 (passing a dead point), the first stop piece 03 rotates clockwise under the action of the elastic force of the first stop piece spring, the operating mechanism recovers to an energy storage state when the buckling amount recovers to the maximum value, the overload cam 02 continues to move, the overload push rod 04 is driven to move backwards through the driving block 05 and the first matching part 07 on the overload push rod 04, and the release 06 and the fault push rod 08 are recovered to the energy storage state.

In actual production, under the influence of various machining dimension errors of parts which are related to each other, tolerance accumulation of a matching point between a fault push rod 08 and an overload push rod 04 of a release is very large, so that a re-buckling stroke required by the overload push rod 04 is large in deviation from a pre-designed value (usually, the re-buckling stroke of the overload push rod is small, and the fault push rod cannot be completely driven to recover to an energy storage state), batch qualification rate is low, and therefore, a rework amount caused by the verification process is large, and even batch scrapping is caused. In order to solve the above problems, the utility model discloses a think of the mode of increasing the detaining stroke again through the length that increases overload push rod 04, but if overload push rod 04 length overlength, can reduce the dropout distance between overload push rod 04 and the first retainer 03, and then reduce the knot volume between when tripping and the overload cam 02 of first retainer 03, so very easily because of external factors such as vibration lead to taking place the thread slipping (also overload cam 02 and first retainer 03 dropout), lead to the major loop not to be cut off under the fault factor. Therefore, how to solve the problem of increasing the re-buckling stroke of the overload push rod 04 without reducing the buckling amount between the overload cam 02 and the first stop 03 is an urgent technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the overload push rod in the prior art can reduce the buckling amount and cause the sliding buckling while increasing the re-buckling stroke, so as to provide an operating mechanism of a control and protection switching device which can not reduce the buckling amount while increasing the re-buckling stroke.

Therefore, the utility model provides an operating mechanism for controlling and protecting a switching device, which comprises an overload cam, a first stop piece and an overload push rod, wherein the overload cam and the first stop piece are both rotatably arranged on a switch body and have a clamping state of snap fit and a tripping state of separation under the driving of the overload push rod; the overload push rod is slidably arranged on the switch body and provided with a matching block which is arranged opposite to the driving block and driven by the driving block, the matching block is provided with a first matching part which is arranged close to the rotation center of the overload cam and a second matching part which is arranged far away from the rotation center of the overload cam, and in the process of re-buckling, the second matching part is in contact with the driving block before the first matching part.

The contact surface of the second matching part and the driving block is a horizontal plane and is flush with the top surface of the first matching part.

The width of the matching block 6 is 5 +/-0.2 mm.

The contact surface of the first matching part and the driving block is an arc surface.

The overload push rod is arranged opposite to the fault push rod of the release, and a buffer structure capable of elastically deforming along the sliding direction of the overload push rod is formed.

The buffer structure comprises at least one open slot formed on the overload push rod, and the opening direction of the open slot is arranged upwards or downwards.

The opening grooves are multiple, and the opening directions of two adjacent opening grooves are opposite.

The bottom surface of the overload push rod is provided with a convex block which can be in sliding contact with the switch body.

The contact surface of the lug and the switch body is an arc surface.

The overload push rod is connected with the switch body in a sliding mode through a sliding rail structure, the sliding rail structure comprises a sliding groove arranged on the switch body and a sliding block arranged on the overload push rod and connected with the sliding groove in an adaptive mode.

One side that the slider was kept away from the overload push rod be equipped with can with the stopper that switch body bottom surface offseted, the spout is including the first section and the second section that connect gradually, the size of first section is greater than the size of slider, and is less than the size of stopper, the size of second section is greater than the size of stopper.

The technical scheme of the utility model has the following advantages:

1. the utility model provides an operating mechanism for controlling and protecting a switching device, which is characterized in that a second matching part is skillfully added on the basis of an original first matching part, an overload cam rotates clockwise in the process of re-buckling, a driving block is firstly contacted with the second matching part, and the driving block drives the overload push rod to move for a certain distance and then is contacted with the first matching part, so that the overload push rod is continuously driven to move.

2. According to the operating mechanism for controlling and protecting the switching device, the contact surface of the second matching part and the driving block is a horizontal plane and is flush with the top surface of the first matching part, it needs to be noted that in the clamping state, a certain distance needs to be kept between the matching block and the driving block, if the distance is too small, the problem that the matching block drives the overload cam to rotate anticlockwise and is disengaged from the first stop piece due to factors such as vibration easily occurs, namely the risk of the sliding block is increased, and the structural arrangement of the second matching part enables the distance between the second matching part and the driving block to be larger than the distance between the first matching part and the driving block in the clamping state, so that the reliability of a product is improved.

3. According to the operating mechanism for controlling and protecting the switching device, the overload push rod and the fault push rod of the release are arranged oppositely, and the buffer structure capable of elastically deforming along the sliding direction is formed, so that the overload push rod is prevented from being in direct hard contact with the fault push rod, the overload push rod is not easy to break, and the service life is prolonged.

4. The utility model provides an operating mechanism for controlling and protecting a switching device, wherein a buffer structure comprises a plurality of open slots formed on an overload push rod, and the opening directions of two adjacent open slots are opposite, so that a wave line with wave crests and wave troughs is formed, and the elastic deformation is increased.

5. According to the operating mechanism for controlling and protecting the switching device, the bottom surface of the overload push rod is provided with the convex block which can be in sliding contact with the switch body, so that the contact area between the overload push rod and the switch body is reduced, the abrasion is reduced, and the service life is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an operating mechanism of a control and protection switching device according to the present invention;

FIG. 2 is a perspective view of an operating mechanism of the control and protection switching device;

FIG. 3 is a schematic view of the assembly of the overload cam, first stop and push rod;

FIG. 4 is a schematic diagram of the exploded structure of FIG. 3;

FIG. 5 is a perspective view of the overload cam;

FIG. 6 is a first perspective view of the overload pushrod;

FIG. 7 is a second perspective view of the overload pushrod;

FIG. 8 is a top plan view of the overload pushrod;

FIG. 9 is a side view of the overload pushrod;

FIG. 10 is a comparison of an overload pushrod of the prior art and the present application;

fig. 11 is a schematic structural diagram of an operating mechanism of a control and protection switching device in the prior art;

fig. 12 is a schematic view showing the assembly of an overload cam, a first stopper and a push rod in the prior art.

Description of reference numerals: 01. a central cam; 02. an overload cam; 03. a first stopper; 04. an overload push rod; 05. a drive block; 06. a release; 07. a first mating portion; 08. a failed push rod;

1. a switch body; 2. an overload cam; 3. a first stopper; 4. an overload push rod; 5. a drive block; 6. a matching block; 7. a first mating portion; 8. a second mating portion; 9. an open slot; 10. a bump; 11. a chute; 12. a slider; 13. a limiting block; 14. a first stage; 15. a second stage; 16. a first buckle block; 17. and a second buckle block.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides an operating mechanism of a control and protection switching device, as shown in fig. 1 to 3, comprising an overload cam 2, a first stopper 3 and an overload push rod 4.

The overload cam 2 and the first stopper 3 are rotatably mounted on the switch body 1, and have a snap-fit retaining state and a release state separated by the driving of the overload push rod 4, as shown in fig. 2 and 4, and the overload cam 2 is provided with a driving block 5 for driving the overload push rod 4 to reset when being re-buckled. In the detent position shown in fig. 2, the first detent 16 of the overload cam 2 engages in a detent manner with the second detent on the first stop element 3. In this embodiment, the drive block 5 has a drive face extending radially from the centre of the overload cam 2, the drive face being adapted to drive the overload tappet 4 into a re-engagement action, as shown.

And the overload push rod 4 is slidably arranged on the switch body 1 and is provided with a matching block 6, a buffer structure and a sliding rail structure, wherein the matching block 6 is arranged opposite to the driving block 5 and is driven by the driving block.

As shown in fig. 6 to 9, the engaging block 6 has a first engaging portion 7 disposed adjacent to the rotational center of the overload cam 2 and a second engaging portion 8 disposed away from the rotational center of the overload cam 2, and the second engaging portion 8 contacts the driving block 5 prior to the first engaging portion 7 in the retightening process. The second matching part 8 and the contact surface of the driving block 5 are horizontal planes and flush with the top surface of the first matching part 7, and the contact surface of the first matching part 7 and the driving block 5 is an arc surface. As shown in fig. 10, the left part of fig. 10 is a schematic diagram of the overload tappet 4 and the driving block 5 in the prior art, and the right part is a schematic diagram of the overload tappet 4 and the driving block 5 in the present application, where b1 is an initial position of the driving block 05/5, and the driving block 05/5 moves to a position b2 after rotating an angle a, as can be seen from comparing left and right views, the driving block 5 in the right view contacts the second engaging part 8 after rotating the angle a, and can drive the overload tappet 4 to reset (re-buckle), while the driving block 05 in the left view does not contact the first engaging part 07 after rotating the same angle a, that is, the re-buckling stroke of the overload tappet 4 in the right view is longer than the re-buckling stroke of the overload tappet 4 in the left view by a distance L, so that the re-buckling stroke of the overload tappet is increased while the overall length of the overload tappet remains unchanged. In the present embodiment, the width D2 of the engagement block 6 is 5 ± 0.2mm, and in the prior art, the width D1 of the first engagement portion 08 is 3 mm.

And the buffer structure is arranged at the end part of the overload push rod 4 adjacent to the tripper fault push rod and can elastically deform along the sliding direction of the overload push rod. In this embodiment, the buffering structure includes two opening grooves 9 formed on the overload push rod 4, and the opening directions of the two opening grooves 9 are arranged upward and downward.

As an alternative embodiment, the number of open slots 9 may be 1, 2, 3 or more,

the bottom surface of the overload push rod 4 is provided with a convex block 10 which can be in sliding contact with the switch body 1, and the contact surface of the convex block 10 and the switch body 1 is an arc surface. Overload push rod 4 through the slide rail structure with switch body 1 sliding connection, the slide rail structure is including locating spout 11 on the switch body 1 to and locate on overload push rod 4, with the slider 12 of spout 11 adaptation connection. One side of slider 12 is kept away from overload push rod 4 be equipped with can with stopper 13 that switch body 1 bottom surface offseted, spout 11 is including the first section 14 and the second section 15 that connect gradually, the size of first section 14 is greater than the size of slider 12, and is less than stopper 13's size, the size of second section 15 is greater than stopper 13's size.

The operating mechanism of the control and protection switch electric appliance provided by the utility model is skillfully provided with the second matching part 8 on the basis of the original first matching part 7, in the re-buckling process, the overload cam 2 rotates clockwise, the driving block 5 is firstly contacted with the second matching part 8, the overload push rod 4 is driven to move for a certain distance and then contacted with the first matching part 7, thereby continuously driving the overload push rod 4 to move, compared with the mode that the driving block drives the overload push rod to move only through the first matching part in the prior art, thus, the re-buckling stroke of the overload push rod 4 is increased, and as the whole length of the overload push rod 4 is kept unchanged, thereby having no influence on the buckling quantity between the overload cam 2 and the first stop piece 3, avoiding the occurrence of slide buckling, improving the reliability of products, and the qualification rate of the product of the re-buckling/resetting is greatly improved, and the characteristics of the product are greatly optimized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims (10)

1. An operating mechanism for controlling and protecting a switching device, comprising:

the overload cam (2) and the first stop piece (3) are both rotatably arranged on the switch body (1) and have a clamping state of snap fit and a tripping state of separation under the driving of the overload push rod (4), and the overload cam (2) is provided with a driving block (5) for driving the overload push rod (4) to reset when in re-tripping;

the overload push rod (4) is slidably mounted on the switch body (1) and is provided with a matching block (6) which is arranged opposite to the driving block (5) and driven by the driving block, the matching block (6) is provided with a first matching part (7) which is arranged close to the rotating center of the overload cam (2) and a second matching part (8) which is arranged far away from the rotating center of the overload cam (2), and in the process of re-buckling, the second matching part (8) is in contact with the driving block (5) before the first matching part (7).

2. The operating mechanism of an electric control and protection switch device according to claim 1, characterized in that the contact surface of the second fitting part (8) with the driving block (5) is horizontal and flush with the top surface of the first fitting part (7).

3. The operating mechanism of an electrical control and protection switch according to claim 1, characterized in that the width of the mating block (6) is 5 ± 0.2 mm.

4. The operating mechanism of the control and protection switching device according to claim 1 or 2, wherein the contact surface of the first engaging portion (7) and the driving block (5) is a circular arc surface.

5. The operating mechanism of the control and protection switching device according to claim 1, wherein the overload plunger (4) is disposed opposite to the fault plunger of the trip unit, and is formed with a buffer structure elastically deformable in a sliding direction thereof.

6. The operating mechanism of the control and protection switching device according to claim 5, wherein the buffer structure comprises at least one opening slot (9) formed on the overload push rod (4), and the opening direction of the opening slot (9) is set up upward or downward.

7. The operating mechanism of the control and protection switching device according to claim 6, wherein there are a plurality of the open slots (9), and the opening directions of two adjacent open slots (9) are opposite.

8. The operating mechanism of the control and protection switching device according to claim 1, wherein the bottom surface of the overload push rod (4) is provided with a projection (10) which can be in sliding contact with the switch body (1).

9. The operating mechanism of the control and protection switching device according to claim 1, wherein the overload push rod (4) is slidably connected to the switch body (1) through a slide rail structure, and the slide rail structure comprises a slide groove (11) disposed on the switch body (1), and a slide block (12) disposed on the overload push rod (4) and adapted to the slide groove (11).

10. The operating mechanism of the control and protection switching device according to claim 9, wherein a limit block (13) capable of abutting against the bottom surface of the switch body (1) is disposed on one side of the slider (12) away from the overload push rod (4), the sliding slot (11) comprises a first section (14) and a second section (15) which are sequentially connected, the size of the first section (14) is larger than that of the slider (12) and smaller than that of the limit block (13), and the size of the second section (15) is larger than that of the limit block (13).

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