Rotary isolating switch

Abstract

A rotary disconnecting switch disclosed by the present invention comprises a plurality of switch units arranged in a stacked manner, each switch unit comprises a shell, a moving contact assembly, a static contact assembly and a contact driving mechanism, the moving contact assembly comprises a moving contact arranged in a sliding manner, the moving contact is in transmission connection with the contact driving mechanism, and the static contact assembly is in transmission connection with the moving contact. Under the driving of the contact driving mechanism, the moving contact can slide to be in contact with or separated from the static contact assembly, so that the occupied movement space of the moving contact becomes smaller, a larger space can be reserved for arranging an arc extinguish chamber, and the size of the product can be reduced.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a rotary isolating switch. Background Art

[0002] The rotary disconnector is usually composed of an operating mechanism unit and several stacked switch units. The switch unit includes a unit housing, each of which is equipped with a pair of stationary contact assemblies and a rotatable moving contact module. The moving contact module is fixed on the rotating shaft, and the operating mechanism unit can operate the rotating shaft to rotate, thereby closing or opening the moving and stationary contacts.

[0003] The moving contact of the traditional rotary disconnector moves in a circular motion, that is, the moving contact rotates around the axis. Therefore, it is necessary to leave enough space for the moving contact to move in the housing. This results in an increase in the housing structure and compresses the space available for arc extinguishing, which limits the arc extinguishing effect of the traditional disconnector and makes the product volume larger. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a rotary isolating switch.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A rotary isolating switch comprises a plurality of stacked switch units, wherein the switch unit comprises a housing, a moving contact assembly, a stationary contact assembly and a contact driving mechanism, wherein the moving contact assembly comprises: a sliding moving contact, wherein the moving contact is transmission-connected to the contact driving mechanism, and under the drive of the contact driving mechanism, the moving contact can slide to contact or disengage with the stationary contact assembly.

[0007] Preferably, the moving contact assembly also includes: a support member; the shell is provided with a slide rail; the support member includes a slider slidably connected to the slide rail, a contact connecting portion fixedly connected to the moving contact, and a transmission connecting portion for transmission connection with a contact driving mechanism; the slide rail extends from a position adjacent to the contact driving mechanism toward the direction of the stationary contact assembly and is adjacent to the stationary contact assembly, and the moving contact can move along the slide rail under the drive of the contact driving mechanism to contact or separate from the stationary contact.

[0008] Preferably, the slide rail includes two parallel retaining walls arranged on the bottom surface of the shell.

[0009] Preferably, the slide rail comprises: a first slide rail extending from the middle area of ​​the shell to the first side edge of the shell and a second slide rail extending from the middle area of ​​the shell to the second side edge of the shell.

[0010] Preferably, the first side and the second side are two opposite sides.

[0011] Preferably, the moving contact includes: a first moving contact piece and a second moving contact piece, the first moving contact piece and the second moving contact piece are relatively assembled and arranged, and the first moving contact piece and the second moving contact piece are provided with bending surfaces relatively bent outward at the ends to form an opening structure, and the structure of the opening structure is adapted to the shape of the static contact assembly so that the two can clamp and contact each other.

[0012] Preferably, the opening structures of the first moving contact piece and the second moving contact piece are provided with guiding curved edges facing the direction of the stationary contact assembly.

[0013] Preferably, the outer end edge of the bending surface is also provided with an arc-striking edge and an arc-striking tip, the arc-striking edge is inclined relative to the movement path of the moving contact, the arc-extinguishing chamber is arranged outside the movement trajectory of the arc-striking tip of the moving contact, the first end of the arc-striking edge is at a greater distance from the arc-extinguishing chamber than its second end, and the arc-striking tip is arranged at the second end of the arc-striking edge.

[0014] Preferably, both ends of the first moving contact piece and the second moving contact piece are provided with the opening structure, arc-striking edge and arc-striking tip, and the arc-striking tips at both ends of the first moving contact piece and the second moving contact piece are arranged on a side close to the arc extinguishing chamber.

[0015] Preferably, a slide rail surface is provided on the top of the retaining wall, and the moving contact is provided with a supporting surface, the supporting surface is mounted on the slide rail surface, and the moving contact slides on the slide rail surface through the supporting surface.

[0016] Preferably, the contact driving mechanism is a connecting rod mechanism.

[0017] Preferably, the connecting rod mechanism includes: a rotating frame fixed on the transmission shaft of the switch unit and a first connecting rod, the first end of the first connecting rod is hingedly connected to the first end of the rotating frame, the hinge point between the first connecting rod and the rotating frame is eccentrically arranged with the rotation axis of the transmission shaft, and the second end of the first connecting rod is provided with a driving connection part hinged to the moving contact.

[0018] Preferably, the connecting rod mechanism also includes: a second connecting rod, the first end of the second connecting rod is hingedly connected to the second end of the rotating frame, the hinge point between the second connecting rod and the rotating frame is eccentrically arranged with the rotation axis of the transmission shaft, and the second end of the second connecting rod is provided with a driving connection part hinged to the moving contact.

[0019] Preferably, the connecting rod mechanism includes: a rotating frame fixed on the transmission shaft of the switch unit, a first connecting rod and a plurality of third connecting rods, the first end of the first connecting rod is hingedly connected to the first end of the rotating frame, the second end of the first connecting rod is hingedly or fixedly connected to one of the third connecting rods, the remaining third connecting rods are hingedly or fixedly connected to each other in sequence, and the last third connecting rod is provided with a driving connection portion connected to the moving contact.

[0020] Preferably, the connecting rod mechanism also includes: a second connecting rod and a plurality of fourth connecting rods, the first end of the second connecting rod is hingedly connected to the second end of the rotating frame, the second end of the second connecting rod is hingedly or fixedly connected to one of the fourth connecting rods, the remaining fourth connecting rods are hingedly or fixedly connected to each other in sequence, and the last fourth connecting rod is provided with a driving connection portion connected to the moving contact.

[0021] In the rotary isolating switch of the present invention, the moving contact of the switch unit moves in a sliding manner, and the slide rail extends from a position adjacent to the contact driving mechanism toward the direction of the stationary contact assembly and is adjacent to the stationary contact assembly, thereby making the movement space occupied by the moving contact smaller, leaving more space for arranging the arc extinguishing chamber, and also facilitating the reduction of the product volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the switch unit structure of the rotary isolating switch of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the rotary isolating switch of the present invention;

[0024] Figure 3 It is a schematic diagram of the housing structure of the switch unit of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the moving contact of the present invention;

[0026] Figure 5 is a schematic diagram of the structure of the moving contact of the present invention (from another perspective);

[0027] Figure 6 It is a schematic diagram of the structure of the movable contact piece of the present invention;

[0028] Figure 7 It is a schematic diagram of the support structure of the present invention;

[0029] Figure 8 is a schematic diagram (a set) of another driving mechanism of the present invention;

[0030] Fig. 9 It is a schematic diagram of another driving mechanism of the present invention (another group).

[0031]

[0032] DETAILED DESCRIPTION

[0033] The following is a further description of the specific implementation of the rotary isolating switch of the present invention in conjunction with the embodiments given in the accompanying drawings. The rotary isolating switch of the present invention is not limited to the description of the following embodiments.

[0034] like Figure 1-2 As shown, a specific embodiment of a rotary disconnector is provided, comprising a plurality of stacked switch units, wherein the switch unit comprises a housing 10 , a moving contact assembly, a stationary contact assembly, a contact driving mechanism and an arc extinguishing chamber 20 .

[0035] In this embodiment, combined with Figure 2 , 3 As shown, the moving contact assembly includes: a moving contact 40 and a support member 80; the housing 10 is provided with a slide rail 103; the support member 80 includes a slider 802 slidably connected to the slide rail 103, a contact connecting portion 803 fixedly connected to the moving contact 40, and a transmission connecting portion 801 for transmission connection with a contact driving mechanism; the slide rail 103 extends from a position adjacent to the contact driving mechanism toward the direction of the stationary contact assembly and is adjacent to the stationary contact assembly, and the moving contact 40 can move along the slide rail 103 under the drive of the contact driving mechanism to contact or separate from the stationary contact.

[0036] In this embodiment, if Figure 3 As shown, the slide rail 103 includes two parallel retaining walls 1030 arranged on the bottom surface of the housing 10. The two retaining walls 1030 can provide a limit for the two sides of the slider 802, and the movable contact 40 can slide linearly along the slide rail 103 under the drive of the contact driving mechanism. The retaining wall 1030 can be a raised rib or a side wall of a slide groove. Of course, if a retaining wall structure is adopted, a slide groove structure can be set on the slider 802 to correspond thereto.

[0037] Combination Figure 1 As shown, in this embodiment, the slide rail 103 includes: a first slide rail 103a extending from the middle area of ​​the housing 10 to the first side edge of the housing 10 and a second slide rail 103b extending from the middle area of ​​the housing 10 to the second side edge of the housing 10. By setting up the double slide rails, the sliding of the two moving contacts can be achieved.

[0038] In this embodiment, the first side and the second side are two opposite sides, and the symmetrical arrangement is conducive to the setting and installation of the arc extinguishing chamber, thereby ensuring the arc extinguishing effect.

[0039] In this embodiment, if Figure 4-6 As shown, the moving contact 40 includes: a first moving contact piece 41 and a second moving contact piece 42, the first moving contact piece 41 and the second moving contact piece 42 are relatively assembled and arranged, and the first moving contact piece 41 and the second moving contact piece 42 are provided with bending parts 413 and 414 bent relatively outward at the end to form opening structures 402 and 403, and the structure of the opening structures 402 and 403 is adapted to the shape of the stationary contact assembly (the first stationary contact 31, the second stationary contact 32, the third stationary contact 33 and the fourth stationary contact 34) so ​​that the two can clamp and contact each other.

[0040] Furthermore, a support member connecting portion 401 is provided in the middle portion of the first moving contact piece 41 and the second moving contact piece 42 for installation and cooperation with the contact connecting portion 803 of the support member 80. The cross-section of the contact connecting portion 803 matches the support member connecting portion 401. The support member connecting portion 401 includes a connecting hole 4011 and a key groove 4012 located on the side wall of the connecting hole 4011. The moving contact 40 is installed on the contact connecting portion 803 through the support member connecting portion 401, and can be well connected to avoid loosening and rotation of the moving contact 40.

[0041] As another alternative implementation, the stationary contact in the stationary contact assembly may adopt an open structure, while the moving contact may adopt a single-piece structure, and the opening structure of the stationary contact may clamp the contact portion of the moving contact.

[0042] Furthermore, the opening structures 402 and 403 of the first moving contact piece 41 and the second moving contact piece 42 are provided with outwardly bent guide edges 4131 and 4141 to form a flaring structure. The guide edges 4131 and 4141 are arranged in the direction toward the static contact and are located on the sides of the first moving contact piece 41 and the second moving contact piece 42. The gap of the flaring structure is larger than the gap of the opening structure, so that the static contact can be smoothly inserted into the opening structures 402 and 403.

[0043] In this embodiment, the outer end edges of the bending portions 413, 414 are further provided with arc-striking edges 4132, 4142 and arc-striking tips 4133, 4143, the arc-striking edges 4132, 4142 are inclined relative to the movement path of the moving contact 40, the arc extinguishing chamber 20 is arranged outside the movement trajectory of the arc-striking tips 4133, 4143 of the moving contact 40, the first ends of the arc-striking edges 4132, 4142 are farther away from the arc extinguishing chamber 20 than the second ends thereof, and the arc-striking tips 4133, 4143 are arranged at the second ends of the arc-striking edges 4132, 4142.

[0044] Further, combined with Figure 1 and Figure 2As shown, both ends of the first moving contact piece 41 and the second moving contact piece 42 are provided with the arc-striking edges 4132, 4142 and arc-striking tips 4133, 4143, and the arc-striking tips 4133, 4143 at both ends of the first moving contact piece 41 and the second moving contact piece 42 are arranged on a side close to the arc extinguishing chamber.

[0045] In this embodiment, a slide rail surface 1031 is provided at the top of the retaining wall 1030, and the movable contact 40 is provided with a support surface, which is mounted on the slide rail surface 1031, and the movable contact 40 slides on the slide rail surface 1031 through the support surface 411. In this embodiment, the first movable contact piece 41 is provided with a first support surface 411 as a support surface, which is mounted on the slide rail surface 1031 and simultaneously contacts and limits the upper limit surface 804 of the slider 802, and the movable contact 40 also slides on the slide rail surface 1031 through the first support surface 411.

[0046] Furthermore, the second movable contact piece 42 is provided with a second supporting surface 421 facing opposite to the first supporting surface 411 , and is used for cooperating with the first supporting surface 411 to form upper and lower limit positions for the first movable contact piece 41 and the second movable contact piece 42 .

[0047] In this embodiment, reference Figure 1 , the contact driving mechanism is a connecting rod mechanism. In this embodiment, the connecting rod mechanism includes: a rotating frame 6 fixed on the transmission shaft 7 and a first connecting rod 5a. The first end of the first connecting rod 5a is hingedly connected to the first end of the rotating frame 6. The hinge point of the first connecting rod 5a and the rotating frame 6 is eccentrically arranged with the rotation axis of the transmission shaft 7. The second end of the first connecting rod 5a is provided with the driving connection part, which is connected to the first moving contact 40a for driving the moving contact to slide. In this embodiment, the rotating frame 6 and the first connecting rod 5a constitute a simple two-link mechanism. The structure of the two-link mechanism is relatively simple, but the space occupied by its movement is relatively small. Compared with the moving contact driving mechanism of the traditional switch unit, the two-link mechanism can drive the moving contact to realize linear motion. That is to say, the space occupied by it is only a linear area, while the traditional one is realized by driving the moving contact to move in a circular motion. Therefore, the space occupied by the traditional one is a whole circular area, which leads to a large amount of space being wasted, which has a great impact on the size of the arc extinguishing chamber and is not conducive to the overall miniaturization of the product.

[0048] In this embodiment, the connecting rod mechanism further includes: a second connecting rod 5b, the first end of the second connecting rod 5b is hingedly connected to the second end of the rotating frame 6, the hinge point of the second connecting rod 5b and the rotating frame 6 is eccentrically arranged with the rotating axis of the transmission shaft 7, and the second end of the second connecting rod 5b is provided with the driving connection part. The two ends of the rotating frame 6 can realize the arrangement of two two-connecting rod mechanisms, thereby realizing the driving of two moving contacts (the first moving contact 40a and the second moving contact 40b).

[0049] As another alternative implementation, Figure 8 As shown, the connecting rod mechanism includes: a rotating frame 6, a first connecting rod 5a and a plurality of third connecting rods 5c, wherein the first end of the first connecting rod 5a is hingedly connected to the first end of the rotating frame 6, the second end of the first connecting rod 5a is hingedly connected or fixedly connected to one of the third connecting rods 5c, and the remaining third connecting rods 5c are hingedly connected or fixedly connected to each other in sequence, and the last third connecting rod 5c is provided with the driving connection part, connected to the moving contact 40a, and the operating range of the third connecting rod 5c is limited by the limiting retaining wall 57 to ensure that the operating direction of the first moving contact 40a is toward the static contact. Among them, the movement of the third connecting rod 5c is limited by the sliding groove to maintain its moving posture. Through the setting of multiple third connecting rods 5c, in some cases, it can make up for the situation that the moving distance of the second connecting rod 5a cannot make the moving contact reach the preset distance. At the same time, it can also reduce the length of the rotating frame and further reduce the occupied space.

[0050] Similarly, if Fig. 9 As shown, the connecting rod mechanism also includes: a second connecting rod 5b and multiple fourth connecting rods 5d, the first end of the second connecting rod 5b is hingedly connected to the second end of the rotating frame 6, the second end of the second connecting rod 5b is hingedly or fixedly connected to one of the fourth connecting rods 5d, and the remaining fourth connecting rods 5d are hingedly or fixedly connected to each other in sequence, and the last fourth connecting rod 5d is provided with the driving connection part, which is connected to the moving contact 40b, and the operating range of the third connecting rod 5c is limited by the limit retaining wall 57 to ensure that the operating direction of the second moving contact 40b is toward the static contact.

[0051] In this embodiment, the switch unit is provided with two moving contact assemblies, and the contact driving mechanism includes a rotatably arranged transmission shaft 7, a rotating frame 6 fixed on the transmission shaft 7, and a first connecting rod 5a and a second connecting rod 5b hinged to both ends of the rotating frame 6. Both ends of the rotating frame 6 protrude from the radial direction of the transmission shaft 7. The first connecting rod 5a and the second connecting rod 5b are respectively hinged to the two moving contact assemblies, that is, they are respectively hinged to the transmission connection part 801 of the support member 80 of the corresponding moving contact assembly, and the two moving contact assemblies are driven by the transmission shaft 7 to slide linearly along the first slide rail 103a and the second slide rail 103b respectively. Figure 3The transmission shaft 7 is arranged at the center of the housing 10 and passes through the housing 10. The housing 10 is provided with a transmission shaft mounting hole 101. Two slide rails 103 are symmetrically arranged on both sides of the transmission shaft 7 in the radial direction, namely a first slide rail 103a and a second slide rail 103b.

[0052] refer to Figure 1 and Figure 2 As shown, the slide rails 103 are arranged on opposite sides of the present embodiment. The switch unit in the present embodiment includes two moving contacts 40, namely a first moving contact 40a and a second moving contact 40b, and four stationary contacts 30, namely a first stationary contact 31, a second stationary contact 32, a third stationary contact 33 and a fourth stationary contact 34. The driving mechanism of the moving contact includes a transmission shaft 7, a rotating frame 6 fixed on the transmission shaft 7, a first connecting rod 5a and a second connecting rod 5b respectively hinged to two ends of the rotating frame 6, and the driving connection parts of the first connecting rod 5a and the second connecting rod 5b are respectively hinged to the first moving contact 40a and the second moving contact 40b. The transmission shaft 7 rotates through the first connecting rod 5a to drive the first moving contact 40a to move linearly along the left slide rail, and the two ends of the first moving contact 40a contact with the first static contact 31 and the second static contact 32 to conduct a circuit. At the same time, the transmission shaft 7 rotates through the second connecting rod 5b to drive the second moving contact 40b to move linearly along the right slide rail, and the two ends of the second moving contact 40b contact with the third static contact 33 and the fourth static contact 34 to conduct another circuit. That is to say, based on the driving system of the moving contact of this embodiment, in one switch unit, two independent moving contacts can be driven simultaneously to slide linearly along the slide rail, and each independent moving contact can respectively contact with two static contacts to conduct a circuit. Therefore, in one switch unit of this embodiment, at least two circuits can be disconnected, that is, there are two circuit switches.

[0053] Of course, based on the slide rail arrangement of this embodiment, it is also possible to realize the arrangement of four circuit switches under reasonable space arrangement. For example, this embodiment adopts the method of relatively arranging two slide rails. If a cross-shaped arrangement is adopted, four slide rails can be arranged, and thus the arrangement of four circuit switches can be realized. In particular, in some specific applications, when the current is small, the space of the arc extinguishing chamber can be compressed or omitted (to make way for the arrangement space of the slide rails), thereby realizing the reasonable arrangement of the four circuit switches.

[0054] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rotary isolating switch, comprising a plurality of stacked switch units, the switch unit comprising a housing (10), a moving contact assembly, a stationary contact assembly and a contact drive mechanism, characterized in that: The moving contact assembly comprises: a sliding moving contact (40), the moving contact (40) being transmission-connected to the contact drive mechanism, and under the drive of the contact drive mechanism, the moving contact (40) can slide to contact or disengage with the stationary contact assembly.

2. The rotary isolating switch according to claim 1, characterized in that: The moving contact assembly further comprises: a support member (80); the housing (10) is provided with a slide rail (103); the support member (80) comprises a slider (802) slidably connected to the slide rail (103), a contact connection portion (803) fixedly connected to the moving contact (40), and a transmission connection portion (801) for transmission connection with a contact drive mechanism; the slide rail (103) extends from a position adjacent to the contact drive mechanism toward the direction of the stationary contact assembly and is adjacent to the stationary contact assembly, and the moving contact (40) can be driven by the contact drive mechanism to move along the slide rail (103) to contact or separate from the stationary contact.

3. The rotary isolating switch according to claim 2, characterized in that: The slide rail (103) comprises two parallel retaining walls (1030) arranged on the bottom surface of the housing (10).

4. The rotary isolating switch according to claim 2 or 3, characterized in that: The slide rail (103) comprises: a first slide rail (103a) extending from the middle area of ​​the shell (10) to the first side edge of the shell (10) and a second slide rail (103b) extending from the middle area of ​​the shell (10) to the second side edge of the shell (10).

5. The rotary isolating switch according to claim 4, characterized in that: The first side and the second side are two opposite sides.

6. The rotary isolating switch according to claim 1, characterized in that: The moving contact (40) comprises: a first moving contact piece (41) and a second moving contact piece (42); the first moving contact piece (41) and the second moving contact piece (42) are relatively assembled and arranged; the first moving contact piece (41) and the second moving contact piece (42) are provided with bending surfaces (413, 414) bent outwardly relative to each other at their ends to form an opening structure (402, 403); the structure of the opening structure (402, 403) is adapted to the shape of the stationary contact assembly so that the two can be clamped and contacted with each other.

7. The rotary isolating switch according to claim 6, characterized in that: The opening structures (402, 403) of the first moving contact piece (41) and the second moving contact piece (42) are provided with guide curved edges (4131, 4141) facing the direction of the stationary contact assembly.

8. The rotary isolating switch according to claim 6, characterized in that: The outer end edge of the bending surface (413, 414) is also provided with an arc-striking edge (4132, 4142) and an arc-striking tip (4133, 4143); the arc-striking edge (4132, 4142) is arranged obliquely relative to the movement path of the moving contact (40); the arc-extinguishing chamber (20) is arranged outside the movement trajectory of the arc-striking tip (4133, 4143) of the moving contact (40); the first end of the arc-striking edge (4132, 4142) is at a greater distance from the arc-extinguishing chamber (20) than the second end thereof; and the arc-striking tip (4133, 4143) is arranged at the second end of the arc-striking edge (4132, 4142).

9. The rotary isolating switch according to claim 8, characterized in that: The opening structure (402, 403), arc-striking edges (4132, 4142) and arc-striking tips (4133, 4143) are provided at both ends of the first moving contact piece (41) and the second moving contact piece (42); the arc-striking tips (4133, 4143) at both ends of the first moving contact piece (41) and the second moving contact piece (42) are provided on a side close to the arc extinguishing chamber.

10. The rotary isolating switch according to claim 3, characterized in that: The top of the retaining wall (1030) is provided with a slide rail surface (1031), and the moving contact (40) is provided with a support surface, the support surface is mounted on the slide rail surface (1031), and the moving contact (40) slides on the slide rail surface (1031) via the support surface.

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