Contact system

Abstract

The invention discloses a contact system, which is arranged in a switch unit and comprises a moving contact module and a static contact module, the moving contact module comprises a driving mechanism, a supporting piece and a moving contact, the static contact module comprises a first static contact and a second static contact, and the moving contact can be driven by the driving mechanism to slide to be in contact with or separated from the first static contact and the second static contact; wherein the first static contact, the second static contact and the moving contact form a loop switch. According to the embodiment, the product size of the switch unit can be reduced.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a contact system. 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 contact system, wherein the contact system includes 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 manipulate the rotating shaft to rotate, thereby closing or opening the moving and stationary contacts.

[0003] The existing switch unit moving contact rotates with its center as the axis of rotation, and then its two ends rotate to the position of the stationary contact to achieve contact and conduction with the stationary contact. This method requires the switch unit to provide a space with a radius of half the moving contact to meet the movement of the moving contact, which results in a larger volume of the switch unit. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a contact system.

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

[0006] A contact system is provided in a switch unit, comprising: a moving contact module and a stationary contact module;

[0007] The moving contact module comprises a driving mechanism, a support and a moving contact, and the stationary contact module comprises a first stationary contact and a second stationary contact, and the moving contact can slide and contact or separate with the first stationary contact and the second stationary contact under the driving of the driving mechanism;

[0008] Wherein, the first stationary contact, the second stationary contact and the moving contact form a loop switch.

[0009] Preferably, the moving contact module also includes a slide rail; the support member includes a slider slidably connected to the slide rail, a contact connection portion fixedly connected to the moving contact, and a transmission connection portion for transmission connection with a driving mechanism; the slide rail extends from a position adjacent to the driving mechanism toward the direction of the stationary contact module and is adjacent to the stationary contact module.

[0010] Preferably, the first stationary contact and the second stationary contact are arranged at intervals on a first side of a housing of the switch unit, the moving contact and the drive mechanism are arranged on a second side of the housing, and the first side is arranged opposite to the second side.

[0011] Preferably, the first stationary contact and the second stationary contact are arranged adjacent to the first side wall of the shell, the driving mechanism is adjacent to the second side wall, and the slide rail extends from the driving mechanism to the first side wall in a direction perpendicular to the second side wall.

[0012] Preferably, the slide rail is formed by two parallel retaining walls arranged on the bottom surface of the shell; the slide rail extends from the driving mechanism of the shell to the first side edge of the shell, adjacent to the first static contact and the second static contact.

[0013] 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.

[0014] 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 be clamped and contacted.

[0015] 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 switch unit is provided with an arc-extinguishing chamber 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.

[0016] Preferably, both ends of the first moving contact piece and the second moving contact piece are provided with the opening structure, the arc-striking edge and the arc-striking tip, the line connecting the two ends of the first moving contact piece and the second moving contact piece is perpendicular to their movement direction, and arc extinguishing chambers are provided on the outer sides of the arc-striking tips at both ends of the first moving contact piece and the second moving contact piece.

[0017] Preferably, the driving mechanism includes a rotatably arranged transmission shaft, a rotating frame fixed on the transmission shaft, the rotating frame protruding radially from the transmission shaft, the rotating frame is hinged to the first end of the first connecting rod, and the second end of the first connecting rod is hinged to the transmission connection part of the support member.

[0018] The moving contact of the switch unit of the present invention moves in a sliding manner, and the slide rail extends from a position adjacent to the driving mechanism toward the direction of the stationary contact assembly and is adjacent to the stationary contact assembly. When facing single-circuit switch control, the movement space occupied by the moving contact becomes smaller, so that the overall switch unit can be made smaller, and at the same time, more space can be left to set up the arc extinguishing chamber.

[0019] Furthermore, when applied to a single circuit, the transmission shaft of the present invention can be arranged at the edge of the shell near the side wall, rather than the central area of ​​the shell, so that the moving contact has a larger contact opening distance, and the setting length of the arc extinguishing chamber can also become longer and larger, thereby improving the arc extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a switch unit of the present invention;

[0021] Figure 2 is a schematic diagram of the housing structure of the switch unit of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the moving contact of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the moving contact of the present invention (from another perspective);

[0024] Figure 5 It is a schematic diagram of the structure of the movable contact piece of the present invention;

[0025] Figure 6 It is a schematic diagram of the support structure of the present invention. Figure 7 It is a schematic diagram of the support structure of the present invention.

[0026] 10 case 6 Rotating frame 7 transmission shaft 20 Interrupter 30 Stationary contact 40 Moving contact 5a First connecting rod 101 First side wall 102 Second side wall 103 Slide rails 1030 Retaining Wall 1031 Slide surface 31 First stationary contact 32 Second static contact 311 First contact part 321 Second contact portion 41 First moving contact 42 Second moving contact 413 Bending surface 414 Bending surface 414 401 Support connection part 402 Opening structure 403 Opening structure 4011 Connection hole 4012 keyway 4131 Guide flange 4141 Guide flange 4132 Arc starting edge 4142 Arc starting edge 4133 Arc starting tip 4143 Arc starting tip 5a First connecting rod 80 Support 801 Transmission connection 802 slider 803 Contact connection DETAILED DESCRIPTION

[0027] The following is a further description of the specific implementation of the switch unit of the present invention in conjunction with the embodiments given in the accompanying drawings. The switch unit of the present invention is not limited to the description of the following embodiments.

[0028] A rotary isolating switch usually includes an operating unit and at least one switch unit, which are stacked together. A contact system is arranged in the switch unit to realize the switching function. The contact system includes a moving contact module and a static contact module. The operating unit is provided with an output shaft, which is connected to the drive mechanism of the switch unit and the drive mechanisms of adjacent switch units. The output shaft of the operating unit rotates to drive the drive mechanism of the switch unit to realize the closing and opening of the switch unit.

[0029] like Figure 1 As shown, a specific embodiment of a switch unit includes: a housing 10 and a contact system, wherein the contact system includes: a moving contact module and a stationary contact module. The moving contact module includes a driving mechanism, a support member 80 and a moving contact 40, and the stationary contact module includes a first stationary contact 31 and a second stationary contact 32.

[0030] In this embodiment, the moving contact 40 can slide under the drive of the driving mechanism to contact or separate with the first static contact 31 and the second static contact (32) to achieve conduction or disconnection. The two static contacts 30 (the first static contact 31 and the second static contact 32) and the moving contact 40 form a circuit switch, that is, they play the role of a switch in the circuit. Further, in this embodiment, the sliding of the moving contact 40 is linear sliding, that is, its motion trajectory is a linear motion trajectory.

[0031] In this embodiment, the moving contact module further includes a slide rail 103, and the support member 80 includes 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 the drive mechanism; the slide rail 103 extends from a position adjacent to the drive mechanism toward the direction of the stationary contact module and is adjacent to the stationary contact module. The moving contact 40 can move along the slide rail 103 under the drive of the drive mechanism to contact with the first stationary contact 31 and the second stationary contact 32 or move away from the stationary contact.

[0032] In this embodiment, the first static contact 31 and the second static contact 32 are arranged at intervals on the first side of the housing 10, and the moving contact 40 and the drive mechanism are arranged on the second side of the housing 10 of the switch unit, so that the setting space of the arc extinguishing chamber can be maximized, and the opening distance between the static contact and the moving contact can be maximized. Figure 1 As shown, the first static contact 31 and the second static contact 32 are arranged near the first side wall 101 of the shell 10, basically close to the side wall of the first side, the driving mechanism is arranged near the second side wall 102, basically close to the side wall of the second side, and the slide rail 103 extends from the driving mechanism to the first side wall 101 in a direction perpendicular to the second side wall 102 to maximize the opening distance, and two arc extinguishing chambers are respectively arranged on both sides of the slide rail 103 to maximize the arc extinguishing chamber.

[0033] The switch unit of this embodiment has only one loop switch, and compared with the traditional structure, the volume is almost reduced by half, and the overall structure is rectangular. In consideration of the appropriate opening distance and arc extinguishing effect, there is still the possibility of further reducing the space.

[0034] Combination Figure 2 and Figure 3As shown, the slide rail 103 is formed by two parallel retaining walls 1030 arranged on the bottom surface of the housing 10; the slide rail 103 extends from the second side of the housing 10 to the first side edge of the housing 10, adjacent to the first static contact 31 and the second static contact 32. The moving 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. The support member 80 of the moving contact 40 is provided with a slider 802, and the moving contact 40 slides in the slide rail 103 through the slider 802.

[0035] In this embodiment, a slide surface 1031 is provided on the top of the retaining wall 1030, and the movable contact 40 is provided with a support surface 411, and the support surface 411 is placed on the slide surface 1031, and the movable contact 40 slides on the slide surface 1031 through the support surface 411. The slider 802 can be lifted or the friction of the slider 802 can be reduced by contacting the support surface 411 with the slide surface 1031 on the retaining wall 1030. The sliding of the slider 802 is only limited by the two inner side walls of the retaining wall, and the main friction force is generated by the contact surface between the support surface 411 and the retaining wall 1030, and the contact area can be set smaller than that of the slider, and the sliding friction force is smaller, so that the sliding of the movable contact 40 is smoother.

[0036] In this embodiment, 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. The first moving contact piece 41 and the second moving contact piece 42 are provided with bending surfaces 413 and 414 bent relatively outward at the ends to form opening structures 402 and 403. The structures of the opening structures 402 and 403 are adapted to the shape of the static contact assembly so that the two can clamp and contact each other.

[0037] Furthermore, a support member connecting portion 401 is provided in the middle of each 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 on the side wall. 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.

[0038] In this embodiment, if Figure 4-6As 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 surfaces 413 and 414 bent relatively outward at the ends to form opening structures 402 and 403, and the structures of the opening structures 402 and 403 are adapted to the shape of the stationary contact assembly (the first stationary contact 31 and the second stationary contact 32) so that the two can clamp and contact each other.

[0039] 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.

[0040] Furthermore, the opening structures 402 and 403 of the first moving contact piece 41 and the second moving contact piece 42 are provided with guide curved edges 4131 and 4141 facing the static contact assembly. The guide curved edges are provided to form a flared opening in the direction toward the static contact, so that the static contact can be smoothly inserted into the opening structures 402 and 403.

[0041] In this embodiment, the outer end edges of the bending surfaces 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.

[0042] Further, combined with Figure 1-6 As 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, the connecting line between the two ends of the first moving contact piece 41 and the second moving contact piece 42 is perpendicular to their movement direction, and arc-extinguishing chambers 20 are provided on the outer sides of the arc-striking tips 4133, 4143 at both ends of the first moving contact piece 41 and the second moving contact piece 42.

[0043] In this embodiment, the shell 10 includes side walls arranged at the outer edge, and a gap space is arranged between the arc extinguishing chambers 20 on both sides and the side walls (between the first side wall 101 and the arc extinguishing chamber 20), and the first static contact 31 and the second static contact 32 are respectively arranged in the gap space.

[0044] In this embodiment, the first stationary contact 31 and the second stationary contact 32 are respectively provided with a first contact portion 311 and a second contact portion 321 , which extend toward the moving contact 40 so as to be located in the arc striking region of the arc extinguishing chamber.

[0045] like Figure 1 , Figure 3 and Figure 7 As shown, in this embodiment, the driving mechanism includes a rotatably arranged transmission shaft 7, a rotating frame 6 fixed on the transmission shaft 7, the rotating frame 6 protruding from the radial direction of the transmission shaft 7, the rotating frame 6 is hinged to the first end of the first connecting rod 5a, the second end of the first connecting rod 5a is hinged to the transmission connection part 801 of the support member 80, the moving contact 40 is arranged on the support member 80, and the transmission shaft 7 rotates through the rotating frame 6 and the first connecting rod 5a to drive the moving contact 40 to slide linearly along the slide rail 103. The rotating frame 6 can be integrally formed with the transmission shaft 7 or independently arranged and then spliced.

[0046] Of course, for this embodiment, the driving mechanism can also be in the form of a push rod. For example, the push rod is directly connected to the slider, the push rod is connected to the transmission shaft 7, and a handle is used outside the shell to directly connect to the transmission shaft. Pushing the handle can push the push rod to operate (equivalent to the transmission shaft 7 also sliding).

[0047] In addition, the driving mechanism may also adopt other mechanisms that can achieve linear drive and is not limited to the driving method provided in this embodiment.

[0048] 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.

[0049] 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 contact system, arranged in a switch unit, comprising: The moving contact module and the stationary contact module are characterized by: The moving contact module comprises a driving mechanism, a support member (80) and a moving contact (40); the stationary contact module comprises a first stationary contact (31) and a second stationary contact (32); the moving contact (40) can slide and contact or separate with the first stationary contact (31) and the second stationary contact (32) under the drive of the driving mechanism; The first stationary contact (31), the second stationary contact (32) and the moving contact (40) form a loop switch.

2. The contact system according to claim 1, characterized in that: The moving contact module also includes a slide rail (103); the support member (80) includes 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 drive mechanism; the slide rail (103) extends from a position adjacent to the drive mechanism toward the direction of the stationary contact module and is adjacent to the stationary contact module.

3. The contact system according to claim 2, characterized in that: The first stationary contact (31) and the second stationary contact (32) are arranged at intervals on a first side of a housing (10) of the switch unit, the moving contact (40) and the drive mechanism are arranged on a second side of the housing (10), and the first side is arranged opposite to the second side.

4. The contact system according to claim 3, characterized in that: The first stationary contact (31) and the second stationary contact (32) are arranged adjacent to the first side wall (101) of the housing (10), the driving mechanism is adjacent to the second side wall (102), and the slide rail (103) extends from the driving mechanism to the first side wall (101) in a direction perpendicular to the second side wall (102).

5. The contact system according to claim 3, characterized in that: The slide rail (103) is formed by two parallel retaining walls (1030) arranged on the bottom surface of the shell (10); the slide rail (103) extends from the driving mechanism of the shell (10) to the first side edge of the shell (10), adjacent to the first static contact (31) and the second static contact (32).

6. The contact system according to claim 5, 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 (411). The support surface (411) is mounted on the slide rail surface (1031), and the moving contact (40) slides on the slide rail surface (1031) via the support surface (411).

7. The contact system 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.

8. The contact system according to claim 7, 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 switch unit is provided with an arc-extinguishing chamber 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 farther away 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 contact system 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); a line connecting the two ends of the first moving contact piece (41) and the second moving contact piece (42) is perpendicular to their movement direction; and arc-extinguishing chambers (20) are provided outside the arc-striking tips (4133, 4143) at both ends of the first moving contact piece (41) and the second moving contact piece (42).

10. The contact system according to claim 1, characterized in that: The driving mechanism comprises a rotatably arranged transmission shaft (7), a rotating frame (6) fixed on the transmission shaft (7), the rotating frame (6) protruding from the radial direction of the transmission shaft (7), the rotating frame (6) being hinged to the first end of the first connecting rod (5a), and the second end of the first connecting rod (5a) being hinged to the transmission connection part (801) of the support member (80).

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