CN219476520U - Load switch for inflatable cabinet - Google Patents

Abstract

The utility model relates to the technical field of inflatable cabinets, in particular to a load switch, which comprises a grounding copper bar, a grounding copper bar and a load switch, wherein the grounding copper bar is fixed on the end face of a T-shaped contact seat; one end of the hexagonal epoxy main shaft is movably hinged to the left side plate, and the other end of the hexagonal epoxy main shaft is fixedly connected to the adapter shaft; the adapter shaft head penetrates through the right side plate and is connected with the hexagonal epoxy main shaft; the connecting crank arm is arranged on the hexagonal epoxy main shaft; the U-shaped notch on the movable contact blade is clamped on the connecting crank arm; the utility model has the advantages that: the adapter shaft head is connected with the hexagonal epoxy main shaft through six aspects and the expansion pin, and the movable contact blade is fixedly connected with the hexagonal epoxy main shaft through the connecting crank arm, so that the whole transmission group is in gapless transmission, the effects of high transmission efficiency, small energy loss and low contact resistance are achieved, the designed grounding copper bar can be independently connected with a cable outgoing line, the situation can be used for testing a cable accessory, the three-phase copper bar can be directly used for short circuit, and the grounding copper bar is used as grounding, and has the characteristics of high universality and excellent flexibility.

Description

Load switch for inflatable cabinet

Technical Field

The utility model relates to the technical field of inflatable cabinets, in particular to a load switch.

Background

The load switch is a mechanical switch electric appliance which can cut off rated load current and a certain overload current, and can be connected, bear a certain time and cut off current under a specified abnormal circuit condition by being matched with a fuse. However, this design has the following problems and disadvantages: 1. four-bar drive is adopted, the transmission parts are more, the transmission clearance is large, and the accumulated deformation is large. 2. The moving contact adopts double sheets, the static contact is a single sheet, and when the rotating drive is easy to occur, the double sheets are dislocated and asynchronous, and the contact effect is poor. 3. The grounding end is in a fixed short circuit mode, three phases cannot be independently led out, and the cable accessory testing device cannot be used for testing cable accessories.

Disclosure of Invention

In order to solve the problems, the utility model provides a load switch structure, which aims to provide a fixed connection mode of a moving contact and a hexagonal epoxy transmission main shaft, so that transmission parts are fewer, no movable gap exists between the moving contact and the hexagonal epoxy transmission main shaft, the transmission efficiency is high, the operating force of an operating mechanism matched with the moving contact is smaller, the structure of the mechanism is simpler, the contact resistance is lower due to the fact that conductive parts are fixedly connected, and the load switch structure also provides a grounding end down-lead copper bar which can be independently connected with a cable sleeve to be led out or can be directly used for shorting three phases of the load switch, and the load switch structure has the characteristics of high universality and excellent flexibility.

In order to achieve the above purpose, the technical scheme provided by the utility model is realized as follows: a load switch, comprising: a right side plate; the left side plate is connected with the first epoxy plate, the second epoxy plate and the third epoxy plate which are arranged in a horizontal dislocation manner; two ends of the first epoxy plate, the second epoxy plate and the third epoxy plate are respectively and fixedly connected with the right side plate and the left side plate; the T-shaped contact seat is provided with a plurality of horizontally fixed on the first epoxy plate and the second epoxy plate; the two ends of the fixed contact blade are respectively pressed on the two sides of the T-shaped contact seat through a plurality of groups of disc springs; the grounding copper bar is fixed on the end face of the T-shaped contact seat; one end of the hexagonal epoxy main shaft is movably hinged to the left side plate, and the other end of the hexagonal epoxy main shaft is fixedly connected to the adapter shaft; the adapter shaft head penetrates through the right side plate and is connected with the hexagonal epoxy main shaft; the connecting crank arm is arranged on the hexagonal epoxy main shaft; the U-shaped notch on the movable contact blade is clamped on the connecting crank arm.

Further, the right side plate is connected with the left side plate through a first epoxy plate, a second epoxy plate and a third epoxy plate which are arranged in a horizontal staggered mode.

Further, two ends of the first epoxy plate, the second epoxy plate and the third epoxy plate are respectively and fixedly connected with the right side plate and the left side plate.

Furthermore, the T-shaped contact seat is provided with a plurality of T-shaped contact seats and is horizontally fixed on the first epoxy plate and the second epoxy plate.

Furthermore, the two ends of the fixed contact blade are respectively pressed on the two sides of the T-shaped contact seat through a plurality of groups of disc springs.

Further, the grounding copper bar is fixed on the end face of the T-shaped contact seat.

Further, one end of the hexagonal epoxy main shaft is movably hinged to the left side plate, and the other end of the hexagonal epoxy main shaft is fixedly connected to the adapter shaft.

Further, the adapter shaft head penetrates through the right side plate to be connected with the hexagonal epoxy main shaft.

Further, the connecting crank arm is arranged on the hexagonal epoxy main shaft.

Further, the U-shaped notch on the movable contact blade is clamped on the connecting crank arm.

Compared with the prior art, the utility model provides the technical scheme with the following beneficial effects: the adapter shaft head is connected with the hexagonal epoxy main shaft through a six-way expansion pin, and the movable contact blade is fixedly connected with the hexagonal epoxy main shaft through a connecting crank arm, so that the integral transmission group is in gapless transmission, the excellent performances of high transmission efficiency, small energy loss and low contact resistance are achieved, the designed grounding copper bar can be independently connected with a cable outgoing line, and the situation can be used for testing a cable accessory; the three-phase copper bar can be directly short-circuited and used as grounding, and the three-phase copper bar has the characteristics of high universality and excellent flexibility.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 and 2 are schematic structural views of a load switch according to an embodiment of the present utility model.

Reference numerals:

100. a right side plate; 101. a left side plate; 102. a first epoxy board; 103. a second epoxy board; 104. a third epoxy board; 105. a T-shaped contact seat; 106. a fixed contact blade; 107. grounding the copper bar; 108. a hexagonal epoxy spindle; 109. the adapter shaft head; 110. connecting the crank arms; 111. a moving contact piece; 112. a baffle; 113. a plastic shaft sleeve; 114. z-shaped copper bars; 115. a limiting plate; 116. soft connection; 117 arc extinguishing bars; 118. a pressing plate; 119. square blocks; 120. a round bar; 121. and (5) positioning the plate.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 and 2, the load switch comprises a right side plate 100, a left side plate 101, a first epoxy plate 102, a second epoxy plate 103, a third epoxy plate 104, a T-shaped contact base 105, a fixed contact sheet 106, a grounding copper guide bar 107, a hexagonal epoxy main shaft 108, a transfer shaft head 109, a connecting crank arm 110 and a moving contact sheet 111, wherein the right side plate 100, the left side plate 101 are horizontally staggered and connected through the first epoxy plate 102, the second epoxy plate 103 and the third epoxy plate 104, and the like, and the structural strength and stability of the whole body are ensured by the principle of three-point connection. The second epoxy plate 103 is provided with the Z-shaped copper bar 114 and the limiting plate 115, the other edge of the limiting plate 115 is fixed on the T-shaped contact base 105, and the second epoxy plate 103, the T-shaped contact base 105, the Z-shaped copper bar 114 and the limiting plate 115 are connected through the same screw rod to form a whole. The two sides of the T-shaped contact base 105 are provided with fixed contact blades 106 and are pressed by disc springs. The movable contact blade 111 is inserted into the inner side of the fixed contact blade 106 after rotating, the movable contact is always in compression contact under the action of disc spring force, and a notch is formed in the middle of the fixed contact blade 106, so that two single surfaces are contacted, the contact surface is effectively improved, the contact resistance is reduced, and the running stability of equipment is improved. The grounding copper bar 107 is disposed on one end surface of the T-shaped contact base 105, and the grounding copper bar 107 can be independently connected with a cable outlet, which can be used for testing cable accessories. The three T-shaped contact bases 105 can be directly shorted by copper bars and used as grounding, and the three T-shaped contact bases have the characteristics of high universality and excellent flexibility. One end of the hexagonal epoxy main shaft 108 is provided with a positioning plate 121, the positioning plate 121 is fixed on the left side plate 101, the hexagonal epoxy main shaft 108 is provided with three equidistant connecting crank arms 110, protruding parts of the connecting crank arms 110 are positioned in U-shaped grooves on the moving contact pieces 111, one end of each moving contact piece 111 is provided with a flexible connection 116, the other end of each hexagonal epoxy main shaft 108 penetrates into the corresponding adapter shaft head 109 to be fixedly connected through an expansion pin, and the moving contact pieces 111 are fixedly connected with the hexagonal epoxy main shaft 108 through the connecting crank arms 110, so that the whole transmission group has no-clearance transmission, and excellent performances of high transmission efficiency, small energy loss and low contact resistance are achieved.

In some embodiments, the right side plate 100 and the left side plate 101 are provided with folded edges, the first epoxy plate 102, the second epoxy plate 103 and the third epoxy plate 104 are placed on the folded edges, and two ends of the first epoxy plate 102, the second epoxy plate 103 and the third epoxy plate 104 are provided with kidney-shaped long holes with different sizes, so that the creepage distance is increased on the premise of not reducing the mechanical strength. The T-shaped contact base 105 is disposed on the first epoxy board 102 and the second epoxy board 103. Specifically, the first epoxy plate 102 and the second epoxy plate 103 used for installing the T-shaped contact base 105 are horizontally placed, and can absorb huge impact force and reduce deformation when the load switch is closed and opened.

In some embodiments, the fixed contact pieces 106 with a notch in the middle are arranged at two sides of the T-shaped contact base 105, a plurality of groups of disc springs are arranged at the outer sides of the fixed contact pieces 106, the fixed contact pieces 106 are in a state of being stressed at two sides simultaneously through screws, the fixed contact pieces 106 realize adjustment of pressing force by adjusting the screws at two sides, and the grounding copper guide bar 107 is arranged at the other side of the T-shaped contact base 105. Specifically, as an extension, the three phases of the grounding copper bar 107 can be used as a cable outlet, or a copper bar is adopted to short-circuit the three phases.

In some embodiments, three sets of moving contact blades 111 are disposed in the middle of the hexagonal epoxy spindle 108. Specifically, the inner six aspect of the connecting lever 110 is combined with the six aspect of the hexagonal epoxy main shaft 108, specifically, the connecting lever 110 is disposed between the hexagonal epoxy main shaft 108 and the moving contact blade 111, further, the connecting lever 110 is inserted into the U-shaped notch of the moving contact blade 111, and further, a gap is formed in the middle of the connecting lever 110. The locking can be ensured to generate slight deformation so as to be completely fixed, the purpose of gapless matching is achieved, and furthermore, the supporting parts at the two ends of the hexagonal epoxy main shaft 108 are positioned at the right side plate 100 and the left side plate 101. Specifically, the support positions of the right side plate 100 and the left side plate 101 are respectively provided with a self-lubricating engineering plastic shaft sleeve, so that abrasion is reduced and service life is prolonged when the hexagonal epoxy main shaft 108 rotates.

In some embodiments, the lower end of the flexible connection 116 is fixed on the third epoxy board 104, and is disposed in a U-shape upwards. Specifically, the upper end of the flexible connection 116 is disposed on the front end face of the moving contact 111. When the movable contact blade 111 rotates, the flexible connection 116 is always driven to move in a U shape. So that the flexible connection 116 does not have a folding point during movement, improving the service life of the flexible connection.

In some embodiments, the arc-extinguishing bars 117 are provided with a plurality of arc-extinguishing bars 117 which are inclined to a certain degree and are arranged above the load switch in a single-piece and segmented mode, specifically, each arc-extinguishing bar 117 is respectively clamped into a notch which is pre-processed by the pressing plate 118, the notch adopts an unperforated mode so as to ensure an electrical gap between phases, and specifically, the square blocks 119 and the round bars 120 are arranged at the front and rear positions of the pressing plate 118. Or the square block 119 and the round rod 120 are used for supporting the pressing plate 118, so that the arc extinguishing grid 117 can be fixed in the pressing plate 118.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.

Claims (6)

1. A load switch, comprising:

a right side plate (100);

the left side plate (101) is connected with the third epoxy plate (104) through the first epoxy plate (102), the second epoxy plate (103) and the third epoxy plate which are horizontally staggered;

two ends of the first epoxy plate (102), the second epoxy plate (103) and the third epoxy plate (104) are respectively and fixedly connected with the right side plate (100) and the left side plate (101);

a plurality of T-shaped contact bases (105) horizontally fixed on the first epoxy plate (102) and the second epoxy plate (103);

the two ends of the fixed contact blade (106) are respectively pressed on the two sides of the T-shaped contact seat (105) through a plurality of groups of disc springs;

the grounding copper guide bar (107) is fixed on the end face of the T-shaped contact seat (105);

a hexagonal epoxy main shaft (108), one end of which is movably hinged with the left side plate (101) and the other end of which is fixedly connected with the adapter shaft head (109);

the adapter shaft head (109) penetrates through the right side plate (100) and is connected with the hexagonal epoxy main shaft (108);

the connecting crank arm (110) is arranged on the hexagonal epoxy main shaft (108);

and the U-shaped notch on the movable contact blade (111) is clamped on the connecting crank arm (110).

2. The load switch according to claim 1, wherein a baffle (112) is arranged on the outer side of the right side plate (100) and penetrates into the adapter shaft head (109), a plastic shaft sleeve (113) is arranged on the left side plate (101), and the hexagonal epoxy main shaft (108) penetrates through the plastic shaft sleeve (113).

3. The load switch according to claim 1, wherein the first epoxy board (102) is horizontally placed, two ends of the first epoxy board are clamped into the right side board (100) and the left side board (101), and a plane placed first epoxy board (102) is arranged on the inner sides of the right side board (100) and the left side board (101).

4. The load switch according to claim 1, wherein a Z-shaped copper bar (114) is arranged right in front of the second epoxy plate (103), and a limit plate (115) is arranged right behind the second epoxy plate, and the limit plate is fixed through the upper surface and the lower surface of the second epoxy plate (103).

5. Load switch according to claim 1, characterized in that the T-contact holder (105) is provided with an arc chute (117) directly in front.

6. The load switch according to claim 5, characterized in that the arc-extinguishing bars (117) are provided with a plurality of segments, and the segments are clamped into pressing plates (118) at two ends, the pressing plates (118) are in tensioning connection with round rods (120) through square blocks (119), or the outer ends of the pressing plates (118) are pressed tightly by plastic screws to press the arc-extinguishing bars (117).