Adaptive grounding switch

Abstract

The application relates to a self-adaptive adjusting grounding switch applied to the technical field of grounding switches, which comprises a self-adaptive adjusting grounding switch, which comprises a support, a moving contact which is movably connected with the support, wherein the contact end of the moving contact is in an arc-shaped structure, and a static contact which is arranged on the support, wherein the contact end of the static contact is in an arc-shaped structure which is complementary to the moving contact. According to the application, the static contact and the moving contact are in arc surface contact, the contact surface is larger, and the current carrying capacity is better; the static contact is not completely static, the static contact has a certain automatic correction function, and can better adapt to the moving contact; and the moving contact utilizes the skin effect, so that the number of grounding rows can be reduced under the condition of ensuring the current carrying capacity.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of grounding switches, in particular to a self-adaptive adjustment type grounding switch. BACKGROUND

[0002] The grounding switch is used in a switch cabinet, wherein a circuit under voltage must be always grounded before the switch cabinet is opened.

[0003] The grounding switch in the prior art comprises a support, a static contact fixedly connected to the support, and a dynamic contact rotatably connected to the support, the dynamic contact being matched with the static contact through rotation to realize grounding closing.

[0004] The dynamic contact is in the shape of a blade, the static contact is formed by two clamping pieces into a notch, and the dynamic contact is clamped into the notch position of the static contact after rotation; however, when the two are matched, the dynamic contact and the static contact are not completely contacted due to the deviation of the angle, that is, the contact surface of the dynamic contact and the static contact is uneven and incomplete, resulting in poor actual load carrying capacity of the dynamic contact and the static contact. SUMMARY

[0005] In order to solve the problem of poor load carrying capacity of the dynamic contact and the static contact, the application provides a self-adaptive adjustment type grounding switch.

[0006] The application provides a self-adaptive adjustment type grounding switch, which adopts the following technical scheme:

[0007] The self-adaptive adjustment type grounding switch comprises:

[0008] a support;

[0009] a dynamic contact movably connected to the support, the contact end of the dynamic contact being in the shape of an arc;

[0010] a static contact arranged on the support, the contact end of the static contact being in the shape of an arc for complementary matching with the dynamic contact.

[0011] Through the above technical scheme, the dynamic contact is movably connected to the support, that is, the dynamic contact has a certain structural adjustment capability and can be properly adjusted in position according to the angle and the contact end of the static contact; since the contact end of the dynamic contact is in the shape of an arc, the arc structure often has good contact adaptability, so that when the arc structure of the dynamic contact is matched with the arc structure of the static contact, the complete coverage of the contact surface can be realized, thereby improving the load carrying capacity of the dynamic contact and the static contact and improving the conductive performance.

[0012] In a specific implementable scheme, the static contact comprises a fixed frame and at least one arc-shaped clamping plate movably connected to the fixed frame, and the static contact is provided with an elastic assembly for driving the arc-shaped clamping plate to move towards the fixed frame.

[0013] By adopting the technical scheme, the fixed frame of the static contact is in a fixed state relative to the support, and the arc-shaped clamping plates are in a movable state relative to the fixed frame, the static contact is a non-fully static structure, the application can have momentum for one or two arc-shaped clamping plates, and the arc-shaped clamping plates are kept in a relatively closed state through the elastic assembly; when the number of the arc-shaped clamping plates is one, that is, the static contact is single-sided movement, the static contact is in contact with the moving contact in the form of single-sided movement, when the number of the arc-shaped clamping plates is two, the arc-shaped clamping plates are on both sides of the fixed frame, and the static contact is in contact with the moving contact in the form of double-sided movement; the double-sided movement is more flexible in movement form, the contact surface is more complete, the single-sided movement is more convenient in assembly than the double-sided movement, and a certain movement flexibility can also be achieved; the scheme as a whole realizes the function of self-adaptive adjustment.

[0014] In a specific implementable scheme, the arc-shaped clamping plates are in sliding connection with the fixed frame.

[0015] By adopting the technical scheme, the movement mode of the arc-shaped clamping plates will adopt the form of sliding, that is, the arc-shaped clamping plates slide away from one side of the fixed frame, and are closed through the elastic assembly, so that when the moving contact is clamped onto the arc-shaped clamping plates, the arc-shaped clamping plates will be pressed to move to one side, so that the arc-shaped clamping plates are in good contact with the moving contact through the elastic contraction force of the elastic assembly; the arc-shaped clamping plates realize sliding in various forms, the arc-shaped clamping plates can have a guide or the fixed frame can have a guide, and the sliding assembly is relatively convenient.

[0016] In a specific implementable scheme, the arc-shaped clamping plates are in rotary connection with the fixed frame.

[0017] By adopting the technical scheme, the movement mode of the arc-shaped clamping plates will adopt the form of rotation, that is, the arc-shaped clamping plates rotate around the fixed frame as the center, and are closed through the elastic assembly, so that when the moving contact is clamped onto the arc-shaped clamping plates, the arc-shaped clamping plates will be pressed to rotate to one side, so that the arc-shaped clamping plates are in good contact with the moving contact through the elastic contraction force of the elastic assembly; the arc-shaped clamping plates realize rotation in various forms, and the arc-shaped clamping plates can realize larger contact end recess expansion with smaller rotation amount.

[0018] In a specific implementable scheme, the fixed frame is provided with a guide rod, the arc-shaped clamping plates are provided with through holes through which the guide rod slides and fits, and the fixed frame and / or the arc-shaped clamping plates are provided with a rotary fulcrum, which is a rotary center support point of the arc-shaped clamping plates.

[0019] By adopting the technical scheme, the arc-shaped clamping plate has sliding and rotating movement on the fixing frame, specifically, a guide rod is arranged on the fixing frame, and the arc-shaped clamping plate is sleeved on the guide rod, so that the arc-shaped clamping plate has a sliding allowance; because there is a certain fitting gap between the guide rod and the through hole, and there is a rotating fulcrum on the fixing frame and / or the arc-shaped clamping plate, the arc-shaped clamping plate has a rotating allowance; specifically, for the convenience of processing, a rotating fulcrum is punched on the side wall of the arc-shaped clamping plate, the rotating fulcrum provides a certain space for the rotation of the arc-shaped clamping plate, and because the rotating fulcrum does not bear the function of connecting the arc-shaped clamping plate and the fixing frame, the rotating fulcrum moves with the arc-shaped clamping plate at will, or the rotating fulcrum is arranged on the fixing frame, so that the movement range of the arc-shaped clamping plate is not limited by the rotating fulcrum; the fixed contact realizes the function of automatic correction.

[0020] In a specific embodiment, the outer surface of the rotating fulcrum is a spherical surface.

[0021] By adopting the technical scheme, the rotating fulcrum adopts a spherical surface, and the linearity of the arc-shaped clamping plate during rotation is high, and the relative stability during rotation is high.

[0022] In a specific embodiment, the elastic component is a spring.

[0023] By adopting the technical scheme, the structure of the spring is easy to assemble, and replacement is convenient.

[0024] In a specific embodiment, the spring is sleeved on the guide rod, and the guide rod is provided with a limiting piece for limiting the spring.

[0025] By adopting the technical scheme, the guide rod not only serves as a sliding track of the arc-shaped clamping plate, but also can serve as a mounting kit of the spring, that is, the spring is sleeved on the guide rod during installation, and is limited and installed by using the limiting piece such as a nut, so that the positioning assembly of the spring is realized, and the structure is multipurpose and convenient to assemble.

[0026] In a specific embodiment, the rotating fulcrum has a plurality of rotating fulcrums, and the arrangement direction of the plurality of rotating fulcrums is parallel to the rotating axis corresponding to the arc-shaped clamping plate.

[0027] By adopting the technical scheme, if the rotating fulcrums are arranged in multiple, the formed structure is similar to a rotating shaft, so as to further reflect on the arc-shaped clamping plate, the rotating direction of the arc-shaped clamping plate is more inclined to the horizontal folding in the middle of the fixing frame, so that the contact surface of the movable contact and the fixed contact is more complete.

[0028] In a specific embodiment, the movable contact is a hollow circular tubular structure.

[0029] By adopting the technical scheme, when the alternating current is conducted in the conductor, the skin effect exists, that is, the current in the wire is concentrated to the surface of the wire, and is not uniformly distributed in the wire. From the perspective of the cross section of the wire, the core part of the wire will not carry current, that is, no current flows, and only the peripheral part of the wire has current flowing, that is, the current is concentrated in the outer skin part of the wire to conduct and flow. According to the foregoing principle, the moving contact is made into a hollow tubular shape, so that the good current carrying rate can be maintained, and the use of the conductor material can be reduced.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The static contact and the moving contact are in arc surface contact, the contact surface is large, the current carrying condition is good, the static contact is not completely static, the static contact has a certain automatic correction function, and can better adapt to the moving contact;

[0032] 2. The moving contact utilizes the skin effect to reduce the number of grounding rows used while ensuring the current carrying rate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0034] Figure 2 is an enlarged view of A of Figure 1 ;

[0035] Figure 3 is a schematic diagram of the static contact assembly structure of the embodiment of the present application;

[0036] Figure 4 is an exploded view of the static contact of the embodiment of the present application;

[0037] Figure 5 is a structure diagram of the rotation fulcrum of the static contact of the embodiment of the present application.

[0038] Explanation of reference signs: 1, support; 2, moving contact; 3, static contact; 31, fixing frame; 32, arc-shaped clamping plate; 321, through hole; 33, guide rod; 34, rotation fulcrum; 35, limiting piece; 351, nut; 352, gasket; 4, elastic assembly; 41, spring. DETAILED DESCRIPTION

[0039] The present application will be further described in detail below in combination with all the drawings.

[0040] Referring to Figure 1 , an adaptive adjusting grounding switch includes a support 1, a static contact 3 is fixedly connected on the support 1, a moving contact 2 is rotatably connected on the support 1, and the moving contact 2 is closed or disconnected with the static contact 3 in the form of rotation.

[0041] Reference Figure 2 The moving contact 2 is a hollow circular tube structure, and the outer surface thereof is an arc structure. According to the skin effect of current, that is, the current in the wire will be concentrated to the surface of the line, rather than uniformly distributed in the wire, from the perspective of the cross section of the wire, the core part of the wire will not carry current, that is, no current flows, and only the peripheral part of the wire will have current flow, simply speaking, that is, the current is concentrated in the outer skin part of the wire to conduct and flow. The hollow circular tube structure of the moving contact 2 has the best load carrying rate when using the same amount of material. Correspondingly, the static contact 3 is provided for the moving contact 2 to be buckled into, and the static contact 3 has a complementary arc structure to the moving contact 2, so that the static contact 3 and the moving contact 2 can maintain good load carrying rate.

[0042] Reference Figure 3 And Figure 4 The static contact 3 includes a fixed frame 31 and an arc-shaped clamping plate 32. The fixed frame 31 is in a fixed state relative to the support 1, and the arc-shaped clamping plate 32 is in a movable state relative to the fixed frame 31, that is, the static contact 3 is a non-fully static structure. A guide rod 33 is provided between the fixed frame 31 and the arc-shaped clamping plate 32. The guide rod 33 is a bolt with a nut at one end and a short thread at the other end. A spring 41 is sleeved on the guide rod 33. The spring 41 can be replaced by a spring sheet or other elastic components 4 with elastic potential. The spring 41 pushes the back plates of the two arc-shaped clamping plates 32, so that the two arc-shaped clamping plates 32 have a relative closing movement trend. The threaded end of the guide rod 33 is connected to a limiting piece 35. The limiting piece 35 includes a nut 351 and a washer 352. The limiting piece 35 limits the movement range of the spring 41 after the spring 41 is sleeved on the guide rod 33, and can adaptively adjust the pre-tightening force of the spring 41. The guide rod 33 provides sliding guide and sliding channel for the arc-shaped clamping plate 32 on the one hand, and provides installation space for the spring 41 on the other hand, serving as the installation kit of the spring 41, and reducing assembly difficulty. Integrating the above structure, the arc-shaped clamping plate 32 has a large amount of movement and a certain self-adaptive adjustment capability.

[0043] The arc-shaped clamping plate 32 is provided with through holes 321 through which the guide rod 33 passes and forms a clearance fit. The number of the through holes 321 is two. Since the inner diameter of the through hole 321 is slightly larger than the outer diameter of the guide rod 33, the guide rod 33 can easily pass through the through hole 321.

[0044] Reference Figure 4 And Figure 5, the side wall of the arc-shaped clamping plate 32 is provided with three rotation fulcrums 34 formed by stamping, the rotation fulcrums 34 protrude a certain amount of volume, and the rotation fulcrums 34 are arranged along the width direction of the arc-shaped clamping plate 32. The arc-shaped clamping plate 32 can swing with the rotation fulcrums 34 as the rotation support axis, the rotation of the arc-shaped clamping plate 32 is more inclined to fold towards the middle part of the fixed frame 31, and the arc-shaped clamping plate 32 has the functions of swinging and sliding, and the rotation allowance of the arc-shaped clamping plate 32 will mainly be reflected in the cooperation gap between the guide rod 33 and the through hole 321, and secondly, the rotation allowance will also be reflected in the height protruded by the rotation fulcrum 34. The arc-shaped clamping plate 32 can freely slide, rotate and fold, so that the contact surface of the movable contact 2 and the static contact 3 is relatively complete, the adhesion is higher, and the load carrying rate is better. Meanwhile, the outer surface of the rotation fulcrum 34 is a spherical surface, for the arc-shaped clamping plate 32, the linearity when rotating is higher, and the wear when rotating is smaller.

[0045] The implementation principle of the embodiment of the present application is that when the movable contact 2 and the static contact 3 are disconnected, the spring 41 drives the two arc-shaped clamping plates 32 to relatively fold, so that the two arc-shaped clamping plates 32 have relatively narrow folds, which can prepare for the clamping of the movable contact 2; when the movable contact 2 is clamped into the static contact 3, the movable contact 2 extrudes the arc-shaped clamping plate 32, overcomes the pre-tightening force of the spring 41, and makes the arc-shaped clamping plate 32 swing and slide outward, so that the movable contact 2 and the static contact 3 are in good contact, and the size of the movable contact 2 can also be adaptively matched.

[0046] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An adaptive grounding switch, characterized in that, The utility model relates to a kind of movable contact and fixed contact, including: Support (1); Movable contact (2), movably connected with the support (1), and the contact end of movable contact (2) is arc structure; Fixed contact (3) is arranged on the support (1), and the contact end of fixed contact (3) is arc structure for complementary cooperation of movable contact (2);The fixed contact (3) includes fixed frame (31), at least one arc-shaped clamping plate (32) movably connected on fixed frame (31), and the elastic component (4) for urging arc-shaped clamping plate (32) to be close to fixed frame (31) is equipped on the fixed contact (3);The fixed frame (31) is equipped with guide rod (33), the arc-shaped clamping plate (32) is equipped with through hole (321) for the sliding insertion of guide rod (33) and clearance fit, and the fixed frame (31) and / or arc-shaped clamping plate (32) is equipped with rotating fulcrum (34), and rotating fulcrum (34) is the rotating center support point of arc-shaped clamping plate (32);The outer surface of rotating fulcrum (34) is spherical surface;The elastic component (4) is spring (41);Spring (41) is sleeved on guide rod (33), and the guide rod (33) is equipped with limiting piece (35) for the position-limiting of spring (41);Rotating fulcrum (34) has several, and the arrangement direction of multiple rotating fulcrums (34) is parallel with the rotating axis line corresponding to arc-shaped clamping plate (32).

2. The self-adjusting grounding switch of claim 1, wherein: The arc-shaped clamping plate (32) is slidably connected with the fixed frame (31).

3. The self-adjusting grounding switch of claim 1, wherein: The arc-shaped clamping plate (32) is rotatably connected with the fixed frame (31).

4. The self-adjusting grounding switch of claim 1, wherein: The movable contact (2) is hollow circular tubular structure.

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