Reclosing circuit breaker

Abstract

The reclosing circuit breaker comprises a cover, an operating mechanism and a sliding block, an accommodating space is arranged above the middle cover, and one end of a handle of the operating mechanism penetrates into the accommodating space; wherein at least two guide rails are arranged on the middle cover, and the guide rails and the middle cover are detachably fixed; the sliding block and the guide rail are arranged in a sliding mode, the sliding block is arranged at the end, located in the containing space, of the handle in a sleeving mode, and the sliding block and the handle move synchronously. The guide rail is directly and detachably matched with the middle cover, and the advantage of being convenient to install is achieved.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and in particular to a reclosing circuit breaker. Background Art

[0002] The output part of the electric operating device of the reclosing circuit breaker often adopts a slider structure, and then the sliding of the slider structure is used to drive the handle of the operating mechanism to move, thereby realizing the opening and closing operations.

[0003] However, the existing slider structure is directly integrated with the electric operating structure, such as the structure shown in CN204577372U. The entire electric operating device is a module, and then the module is fixed to the housing of the circuit breaker. When fixing the electric operating device, the slider needs to be sleeved on the handle of the operating mechanism. However, from the perspective of its structure, the slider is located below the entire electric operating device, so it is not convenient to sleeve it. At the same time, for some circuit breakers with relatively small frames, such an electric operating device is also very inconvenient to set up.

[0004] It can be seen that how to improve the slider structure is also a problem that needs to be studied by ordinary technicians in this field. Summary of the invention

[0005] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and to provide a reclosing circuit breaker.

[0006] The present application provides: a reclosing circuit breaker, which includes a cover, an operating mechanism and a slider; a storage space is provided above the middle cover, and one end of the handle of the operating mechanism is inserted into the storage space; wherein at least two guide rails are provided on the middle cover, and the guide rails are detachably fixed to the middle cover; the slider and the guide rail are slidably arranged, the slider is sleeved on one end of the handle located in the storage space, and the slider and the handle are arranged for synchronous movement.

[0007] The guide rail of this structure is directly detachably matched with the middle cover, so that the slider can also be directly detachably matched with the middle cover. Compared with the prior art that forms a complete electric operating device with the guide rail, slider motor, gear set, etc., the assembly between the slider and the handle of this structure is easier, especially for some small-volume circuit breakers, this assembly method will be beneficial to workers' assembly.

[0008] In an embodiment of the present application, the middle cover includes a partition and side walls surrounding the partition, the side walls surrounding the partition to form the accommodating space; a portion of the partition is raised to form a raised portion, and the raised portion is used to cooperate with the handle; at least one guide rail is located above the raised portion, and at least one guide rail is arranged close to one side wall.

[0009] With this structure and guide rail arrangement, the slide block can be more easily matched with the handle.

[0010] In an embodiment of the present application, a guide rail mounting bracket is also included, each guide rail corresponds to two guide rail mounting brackets, the guide rail mounting brackets are fixed on the middle cover, and the two ends of each guide rail are respectively detachably fixed to the corresponding guide rail mounting brackets.

[0011] With this structure, the provision of the guide rail mounting bracket will make the installation of the guide rail simpler and more stable.

[0012] In an embodiment of the present application, the middle cover includes a partition and side walls surrounding the partition, the side walls surrounding the partition to form the accommodating space; a portion of the partition is raised to form a raised portion, the raised portion is used to cooperate with the handle, and at least one guide rail mounting bracket is located on the raised portion.

[0013] With this structure, the provision of the guide rail mounting bracket will make the installation of the guide rail simpler and more stable. At the same time, at least one guide rail mounting bracket is located on the raised portion, which can make it easier to assemble the slider with the handle.

[0014] In an embodiment of the present application, a first groove is provided on the slider, and a shape of the first groove is at least the same as a portion of one of the guide rail mounting brackets. When the operating mechanism is in the open state, a portion of the guide rail mounting bracket is in the first groove.

[0015] With this structure, the first groove and the guide rail mounting bracket can form a limit. Of course, this limit can be the limit after the slider moves to the opening position, or it can be the limit after the slider is installed to facilitate the connection with the electric operating structure.

[0016] In an embodiment of the present application, of the two guide rail mounting brackets corresponding to each guide rail, one is a first guide rail mounting bracket, and the other is a second guide rail mounting bracket; the first guide rail mounting bracket has a slot on the side facing the second guide rail mounting bracket, and the second guide rail mounting bracket is provided with a fixing slot; one end of the guide rail is inserted into the slot, and the other end of the guide rail is located in the fixing slot; and a fastener is also included, which presses the other end of the guide rail into the fixing slot.

[0017] With this structure, the design of the two mounting guide rails allows the guide rail to be first inserted into the first guide rail mounting bracket, and then the other end of the guide rail is placed into the fixing groove, and then the guide rail is pressed into the fixing groove by the fastener, which is very convenient for the installation of the guide rail.

[0018] In an embodiment of the present application, a DC motor and a gear box are also provided in the middle cover. The DC motor is connected to the input end of the gear box, and the output end of the gear box is a crank. The crank and the slider form a crank slider mechanism. The unidirectional output of the DC motor causes the crank slider mechanism to reciprocate, prompting the operating mechanism to close and open the switch. A gear box mounting bracket is provided on the middle cover, and the gear box is detachably fixed on the gear box mounting bracket, and the gear box as a whole is located above the slider.

[0019] With this structure, the design of the gearbox can make the electric operating structure itself form a module. It only needs to be installed on the gearbox mounting bracket so that the crank and the slider form a crank slider mechanism. Such a structure will also be very convenient for assembly.

[0020] In an embodiment of the present application, the slider is provided with an opening drive surface and a closing drive surface for contact by the crank; both the opening drive surface and the closing drive surface are provided with reinforcement members, the strength of the reinforcement members is higher than the strength of the slider, and the crank pushes the opening drive surface or the opening drive surface by acting on the reinforcement member to close or open the operating mechanism.

[0021] By adopting this structure and the design of the reinforcement, the impact resistance of the slider can be improved, the direct impact and wear of the crank on the slider can be reduced, and the stability of the slider can be improved.

[0022] In an embodiment of the present application, a guide rail mounting bracket is also included, the mounting surface of the guide rail on the guide rail mounting bracket is a first mounting surface, the mounting surface of the gear box on the gear box mounting bracket is a second mounting surface, and the height of the second mounting surface is higher than the first mounting surface.

[0023] With this structure, the first mounting surface of the guide rail mounting bracket and the second mounting surface of the gear box mounting bracket are directly made in a form with a height difference, which can ensure that the two structures do not interfere with each other during installation, which is beneficial to the assembly of the two.

[0024] In an embodiment of the present application, the number of the DC motors is at least two, and the gearbox also includes at least two stages of double teeth and an output gear. The first stage of double teeth is the input end of the gearbox and is meshed with the output parts of all DC motors; the double teeth of each stage are meshed in sequence, and the small tooth part of the last stage of double teeth is meshed with the output gear, and the output gear is connected to the crank.

[0025] With this structure, after multiple motors use multi-stage gear reduction, it can effectively ensure that the crank outputs sufficient torque to drive the slider to move, thereby realizing rapid opening and closing operations of the operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A three-dimensional diagram of a reclosing circuit breaker according to Embodiment 1 of the present application is shown;

[0028] Figure 2 A schematic diagram of a reclosing circuit breaker after removing the upper cover in Embodiment 1 of the present application is shown;

[0029] Figure 3 A schematic diagram and a partial enlarged diagram of the middle cover in Example 1 of the present application are shown;

[0030] Figure 4 A schematic diagram showing the cooperation between the middle cover and the guide rail in Example 1 of the present application is shown;

[0031] Figure 5 A schematic diagram showing the coordination of the middle cover, the guide rail and the slider in Example 1 of the present application is shown;

[0032] Figure 6 A schematic diagram of a slider in Embodiment 1 of the present application is shown;

[0033] Figure 7 The internal schematic diagram of the gear box without the box cover in Example 1 of the present application is shown;

[0034] Figure 8 The axial view of the gear box without the box cover in Example 1 of the present application is shown;

[0035] Fig. 9 A diagram showing the position relationship between a crank and a slider when a reclosing circuit breaker according to Embodiment 1 of the present application is in a closed position;

[0036] Fig.10 A diagram showing the position relationship between a crank and a slider when a reclosing circuit breaker according to Example 1 of the present application is in an open position. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "primary" and "secondary" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, when a main feature is “above” or “below” a second feature, it can mean that the main feature and the second feature are in direct contact, or the main feature and the second feature are in indirect contact through an intermediate medium. Moreover, when a main feature is “above”, “above” or “above” a second feature, it can mean that the main feature is directly above or obliquely above the second feature, or simply means that the main feature is higher in level than the second feature. When a main feature is “below”, “below” or “below” a second feature, it can mean that the main feature is directly below or obliquely below the second feature, or simply means that the main feature is lower in level than the second feature. Example

[0042] like Figure 1-10 As shown in the figure, an embodiment of the present application provides a reclosing circuit breaker, which includes a housing, a gear box 50, a DC motor 40, an operating mechanism, a contact assembly, an arc extinguishing assembly, and the like.

[0043] The housing here includes a base 10, a middle cover 11 and an upper cover 12. Here, the base 10 is arranged below the middle cover 11, and the base 10 and the middle cover 11 are fastened by bolts. The upper cover 12 is arranged above the middle cover 11, and the upper cover 12 and the middle cover 11 are also fastened by bolts. Of course, in addition to this, bolts can be used to fasten all three, or other fastening methods can be used. No matter which method is used, as long as the stability of the three structures can be ensured.

[0044] Here, the middle cover 11 includes a partition 110 and a side wall 111 surrounding the partition 110, and the side wall 111 surrounds the partition 110 to form a receiving space 113. Of course, the partition 110 here does not specifically refer to a flat wall, nor does it refer to a completely closed wall. The main function of the partition 110 here is to separate the receiving space 113 from the strong electric components in the base 10 as much as possible. For example, the partition 110 here has a bulge 114 that bulges toward the receiving space 113 at the approximate middle position. The design of the bulge 114 here is to adapt to the movement trajectory of the handle 20 of the operating mechanism. Similarly, the bulge 114 also has a handle hole 115 for the handle 20 to penetrate.

[0045] The operating mechanism is fixed on the base 10, and most of the components of the operating mechanism are arranged below the middle cover 11, that is, below the partition 110, and only the handle 20 of the operating mechanism passes through the handle hole 115 and the partition 110 and extends into the accommodating space 113. The movement of the handle 20 here can realize the opening and closing operations of the circuit breaker. The internal structure and transmission relationship of the operating mechanism here are common knowledge to those skilled in the art, and will not be repeated here.

[0046] A guide rail mounting bracket is provided in the accommodation space 113. Here, the guide rail mounting bracket is used to fix the guide rail 118. There are two guide rails 118 here. Here, the guide rail mounting bracket is protruded upward from the partition 110, that is, it is integrally formed on the middle cover 11. Of course, in addition to this, the guide rail mounting bracket can also be independent of the middle cover 11 and fastened to the middle cover 11 in other ways, such as screw fastening, clamping fixation, interference fit, etc. There are two guide rails 118, one is close to the side wall 111, and the other is located above the raised portion 114.

[0047] Here, each guide rail 118 corresponds to two guide rail mounting brackets, namely, a first guide rail mounting bracket 116 and a second guide rail mounting bracket 117. Both ends of the guide rail 118 are respectively fixed to the first guide rail mounting bracket 116 and the second guide rail mounting bracket 117. The guide rail 118 is detachably matched with the first guide rail mounting bracket 116 and the second guide rail mounting bracket 117, thereby realizing detachable matching between the guide rail 118 and the middle cover 11.

[0048] Here, a detachable matching structure is briefly illustrated, where the first guide rail mounting bracket 116 and the second guide rail mounting bracket 117 are arranged at intervals, and a slot 119 is provided on the side surface of the first guide rail mounting bracket 116 facing the second guide rail mounting bracket 117, and one end of the guide rail 118 can be inserted into the slot 119. A fixing slot 120 is provided on the second guide rail mounting bracket 117, and the other end of the guide rail 118 extends into the fixing slot 120. The fastener 121 is fixed to the second guide rail mounting bracket 117, and the other end of the guide rail 118 can be pressed tightly in the fixing slot 120, thereby achieving stable installation of the guide rail 118.

[0049] Of course, the fastener 121 here is a screw. In addition, the fastener 121 and the second guide rail mounting bracket 117 can also be fixed by means of a snap connection, interference fit, etc. to form a stable connection structure to press the guide rail 118. Of course, the installation structure of the guide rail 118 in the above example can also be reversed, for example, the fixing groove 120 is opened on the second guide rail mounting bracket 117, the fixing groove 120 and the fastener 121 are set on the first guide rail mounting bracket 116, or the fixing groove 120 and the fastener 121 are used on both guide rail mounting brackets.

[0050] In this embodiment, a first guide rail mounting bracket 116 is provided on the raised portion 114. A first groove 31 is provided on the slider 30, and the shape of the first groove 31 here matches that of a part of the first guide rail mounting bracket 116. When the handle 20 is in the off state, a part of the first guide rail mounting bracket 116 is just in the first groove 31. The first groove 31 here and the first guide rail mounting bracket 116 can be said to achieve a similar limiting function.

[0051] The slider 30 is sleeved on the two guide rails 118 for sliding. The slider 30 has a sleeve hole sleeved on the handle 20, so that the slider 30 and the handle 20 can form a synchronous movement relationship.

[0052] The slider 30 is also provided with a switch-off drive surface 32 and a switch-on drive surface 33, which are used to cooperate with the crank 54, and the slider 30 slides in different directions by the crank 54 acting on different drive surfaces. Of course, in order to reduce the direct impact force of the crank 54 on the slider 30, a reinforcement member 34 is also provided on the switch-off drive surface 32 and the switch-on drive surface 33, and the strength of the reinforcement member 34 is greater than the strength of the slider 30. The materials of the slider 30 and the reinforcement member 34 can be plastic and angle iron respectively, so that the reinforcement member 34 can directly receive the impact of the crank 54 instead of the switch-off drive surface 32 and the switch-on drive surface 33. The reinforcement member 34 and the slider 30 are fastened by screws, and of course, other methods can be used for fixing, such as interference fit, snap fit or insert.

[0053] There are three DC motors 40 , which are of one type and have only one working direction.

[0054] The gearbox 50 includes a box body and a box cover, wherein at least two stages of double-linked teeth and an output gear 53 are arranged inside the box cover, and a crank 54 is arranged outside the box body. The number of double-linked teeth here is three. The large tooth portion of the first-stage double-linked teeth 51 meshes with the input portion of the three DC motors 40 at the same time. Then the meshing relationship between the double-linked teeth of each pole satisfies that the small tooth portion of the double-linked teeth of the previous stage meshes with the large tooth portion of the double-linked teeth of the next stage. The small tooth portion of the third-stage double-linked teeth 52 meshes with the output gear 53, and the output gear 53 and the crank 54 are in transmission connection. In this way, the output of the DC motor 40 can be decelerated and converted into a suitable output torque to realize the opening and closing of a reclosing circuit breaker. Here, the pitch circle diameter of the output gear 53 is greater than the pitch circle diameter of any double-linked teeth (that is, the pitch circle diameter of the large tooth portion of any double-linked teeth). The double-linked teeth of each pole also satisfy that the pitch circle diameter of the large tooth portion of the double-linked teeth of the next stage is greater than the pitch circle diameter of the double-linked teeth of the previous stage.

[0055] The crank 54 is connected to the output gear 53, so that the output gear 53 rotates to drive the crank 54 to rotate. In this way, the rotation of the crank 54 drives the opening drive surface 32 and the closing drive surface 33 to move, realizes the reciprocating motion of the slider 30, and realizes the opening and closing operations of the circuit breaker.

[0056] A gearbox mounting bracket 122 is provided in the accommodating space 113. The gearbox mounting bracket 122 is used to fix the gearbox 50. There are three gearbox mounting brackets 122. The gearbox 50 and the gearbox mounting bracket 122 are fastened by bolts. Of course, other methods such as snap-fitting and interference fit can also be used. The gearbox mounting bracket 122 here protrudes upward from the partition 110, that is, it is integrally formed on the middle cover 11. Of course, other methods such as screw fastening, snap-fitting and interference fit can also be used.

[0057] Here, the mounting surface of the guide rail 118 on the guide rail mounting bracket is the first mounting surface 116a, and the mounting surface of the gear box 50 on the gear box mounting bracket 122 is the second mounting surface 122a, and the height of the second mounting surface 122a is higher than the first mounting surface 116a. In this way, after the guide rail 118 is installed, it will not hinder the installation of the gear box 50.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A reclosing circuit breaker, comprising a cover, an operating mechanism and a slider; a receiving space is provided above the middle cover, and one end of a handle of the operating mechanism is inserted into the receiving space; characterized in that: At least two guide rails are arranged on the middle cover, and the guide rails are detachably fixed to the middle cover; the slider is slidably arranged on the guide rails, and the slider is sleeved on one end of the handle located in the accommodating space, and the slider and the handle are arranged for synchronous movement.

2. A reclosing circuit breaker according to claim 1, characterized in that: The middle cover includes a partition and a side wall surrounding the partition, the side wall surrounding the partition to form the accommodation space; a part of the partition is raised to form a raised portion, and the raised portion is used to cooperate with the handle; At least one guide rail is located above the raised portion, and at least one guide rail is disposed close to a side wall.

3. A reclosing circuit breaker according to claim 1, characterized in that: It also includes guide rail mounting brackets, each guide rail corresponds to two guide rail mounting brackets, the guide rail mounting brackets are fixed on the middle cover, and the two ends of each guide rail are respectively detachably fixed to the corresponding guide rail mounting brackets.

4. A reclosing circuit breaker according to claim 3, characterized in that: The middle cover includes a partition and side walls surrounding the partition, the side walls surrounding the partition to form the accommodating space; a part of the partition is raised to form a raised portion, the raised portion is used to cooperate with the handle, and at least one guide rail mounting bracket is located on the raised portion.

5. A reclosing circuit breaker according to claim 3, characterized in that: The slider is provided with a first groove, the shape of which is at least the same as a part of one of the guide rail mounting brackets. When the operating mechanism is in the open state, a part of the guide rail mounting bracket is in the first groove.

6. A reclosing circuit breaker according to claim 3, characterized in that: One of the two guide rail mounting brackets corresponding to each guide rail is a first guide rail mounting bracket, and the other is a second guide rail mounting bracket; the first guide rail mounting bracket has a slot on the side facing the second guide rail mounting bracket, and the second guide rail mounting bracket has a fixing slot; one end of the guide rail is inserted into the slot, and the other end of the guide rail is located in the fixing slot; and a fastener is also included, which presses the other end of the guide rail into the fixing slot.

7. A reclosing circuit breaker according to claim 1, characterized in that: A DC motor and a gear box are also provided in the middle cover. The DC motor is connected to the input end of the gear box. The output end of the gear box is a crank. The crank and the slider form a crank slider mechanism. The unidirectional output of the DC motor causes the crank slider mechanism to reciprocate, prompting the operating mechanism to close and open the switch. A gear box mounting bracket is provided on the middle cover. The gear box is detachably fixed on the gear box mounting bracket, and the gear box is located above the slider as a whole.

8. A reclosing circuit breaker according to claim 7, characterized in that: The slider is provided with an opening drive surface and a closing drive surface for the crank to contact; the opening drive surface and the closing drive surface are both provided with reinforcement members, the strength of the reinforcement members is higher than the strength of the slider, and the crank pushes the opening drive surface or the opening drive surface by acting on the reinforcement member to close or open the operating mechanism.

9. A reclosing circuit breaker according to claim 7, characterized in that: It also includes a guide rail mounting bracket, the mounting surface of the guide rail on the guide rail mounting bracket is a first mounting surface, the mounting surface of the gear box on the gear box mounting bracket is a second mounting surface, and the height of the second mounting surface is higher than the first mounting surface.

10. A reclosing circuit breaker according to claim 7, characterized in that: The number of the DC motors is at least two, and the gearbox also includes at least two stages of double teeth and an output gear. The first stage of double teeth is the input end of the gearbox and meshes with the output parts of all DC motors; the double teeth of each stage are meshed in sequence, and the small tooth part of the last stage of double teeth is meshed with the output gear, and the output gear is connected to the crank.

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