阅读说明：本技术 一种双向平衡拉绳开关 (Bidirectional balance pull-cord switch ) 是由 钱鸣忠 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种双向平衡拉绳开关,包括固定板,所述固定板底部外壁开有滑动槽,且滑动槽靠近固定板中心一端连接有空腔,所述空腔内部设有滑动块,且滑动块焊接有第一弧形夹板,所述第一弧形夹板通过螺栓螺接有第二弧形夹板,且固定板顶部四周外壁均开有卡槽,所述卡槽内壁均卡接有卡接块,且卡接块焊接有保护罩。本发明通过在固定板底部设有可以滑动插接的滑动块,使得该装置可以固定在不同直径的圆柱上,能够适合室外缺乏固定地方的情况下使用,且弧形夹板内壁的防滑垫,可以防止固定后发生滑动,增大装置的牢固性,并且在开关外部设有插接的保护罩,可以防止开关本体被雨水淋湿和内部进入灰尘,可以延长开关的使用寿命。(The invention discloses a bidirectional balance pull-cord switch which comprises a fixed plate, wherein a sliding groove is formed in the outer wall of the bottom of the fixed plate, one end, close to the center of the fixed plate, of the sliding groove is connected with a cavity, a sliding block is arranged inside the cavity, a first arc-shaped clamping plate is welded on the sliding block, the first arc-shaped clamping plate is connected with a second arc-shaped clamping plate through a bolt in a threaded mode, clamping grooves are formed in the outer walls of the periphery of the top of the fixed plate, clamping blocks are clamped on the inner walls of the clamping grooves, and a protective cover is welded on the clamping blocks. The sliding block which can be inserted in a sliding mode is arranged at the bottom of the fixing plate, so that the switch can be fixed on cylinders with different diameters and can be used under the condition that a fixing place is not available outdoors, the anti-slip pad on the inner wall of the arc-shaped clamping plate can prevent sliding after fixing, firmness of the switch is improved, the protection cover which is inserted in the switch is arranged outside the switch, the switch body can be prevented from being wetted by rainwater and dust can be prevented from entering the switch body, and the service life of the switch can be prolonged.)

1. A bidirectional balance pull-cord switch comprises a fixed plate (1) and is characterized in that a sliding groove (2) is formed in the outer wall of the bottom of the fixed plate (1), one end, close to the center of the fixed plate (1), of the sliding groove (2) is connected with a cavity (3), a sliding block (4) is arranged inside the cavity (3), a first arc-shaped clamping plate (5) is welded on the sliding block (4), the first arc-shaped clamping plate (5) is connected with a second arc-shaped clamping plate (6) through a bolt in a threaded mode, clamping grooves (7) are formed in the outer wall of the periphery of the top of the fixed plate (1), clamping blocks (8) are clamped on the inner wall of each clamping groove (7), a protective cover (9) is welded on each clamping block (8), symmetrically-distributed threading holes (10) are formed in the inner walls of two sides of the protective cover (9), symmetrically-distributed connecting rods (11) are welded on the inner wall of the top of the protective cover (9), and fixing rings (12) are welded on the outer wall of the bottom of the connecting rods (11), and the switch body (13) is fixed on the fixing ring (12).

2. The bidirectional balance pull-cord switch according to claim 1, wherein the diameter of the inner wall of the slot (7) is matched with the diameter of the clamping block (8), and the slot (7) and the clamping block (8) form an interference fit.

3. The bidirectional balance pull-cord switch according to claim 1, wherein the inner walls of the first arc-shaped clamping plate (5) and the second arc-shaped clamping plate (6) are both bonded with anti-slip pads, and the outer walls of the anti-slip pads are both provided with anti-slip threads.

4. The bidirectional balanced pull-cord switch according to claim 1, wherein the inner wall diameter of the sliding groove (2) is matched with the diameter of the sliding block (4), and the sliding groove (2) and the sliding block (4) form a sliding fit.

5. The bidirectional balanced pull-cord switch according to claim 1, wherein an insulating pad is adhered to the outer wall of the top of the fixed plate (1), and the switch body (13) is fixed on the fixed plate (1) through bolts.

6. The bidirectional balanced pull-cord switch as claimed in claim 1, wherein the inner wall of the cavity (3) is fitted with the sliding block (4), and a semi-cylindrical stopper is adhered to the inner wall of the bottom of the cavity (3).

Technical Field

The invention relates to the technical field of switch equipment, in particular to a bidirectional balance pull-cord switch.

Background

The pull-cord switch is a coal conveying belt protection switch, and is used for emergency stop of the coal conveying belt when the coal conveying belt has a fault endangering the safety of human bodies and equipment, so that the function of protecting the safety of the human bodies and the equipment is achieved. The existing pull-cord switch mainly comprises a pull cord and a microswitch. When the coal conveying belt has a fault which endangers the safety of people and equipment, an operator pulls the pull rope, the pull rope pulls and triggers the microswitch to cut off the coal conveying belt operation circuit, the coal conveying belt is emergently stopped, and the function of protecting the safety of people and equipment is achieved. However, since the microswitch includes a mechanical contact, when the microswitch is wetted by rainwater, the pull-cord switch is easily rusted, and cannot be turned on to stop the vehicle in an emergency, which may cause an accident. And when the micro-switch is used in an environment with high combustible dust concentration, the mechanical contact of the micro-switch is easy to discharge to ignite the combustible objects to cause fire, so that great potential safety hazard exists.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a bidirectional balance pull-cord switch.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a two-way balance stay cord switch, includes the fixed plate, fixed plate bottom outer wall is opened there is the sliding tray, and the sliding tray is close to fixed plate center one end and is connected with the cavity, the inside sliding block that is equipped with of cavity, and the sliding block welding has first arc splint, first arc splint have second arc splint through the bolt spiro union, and the fixed plate top outer wall all opens all around there is the draw-in groove, the equal joint of draw-in groove inner wall has the joint piece, and the joint piece welding has the safety cover, safety cover both sides inner wall all is equipped with the through wires hole of symmetric distribution, and the welding of safety cover top inner wall has the connecting rod of symmetric distribution, the welding of connecting rod bottom outer wall has solid fixed ring, and gu fixed ring is fixed with the switch body.

Preferably, the diameter of the inner wall of the clamping groove is matched with the diameter of the clamping block, and the clamping groove and the clamping block form interference fit.

Preferably, the inner walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate are both bonded with anti-slip pads, and the outer walls of the anti-slip pads are both provided with anti-slip threads.

Preferably, the diameter of the inner wall of the sliding groove is matched with that of the sliding block, and the sliding groove and the sliding block form sliding fit.

Preferably, the outer wall of the top of the fixing plate is bonded with an insulating pad, and the switch body is fixed on the fixing plate through a bolt.

Preferably, the inner wall of the cavity is matched with the sliding block, and the inner wall of the bottom of the cavity is bonded with a semi-cylindrical stop strip.

The invention has the beneficial effects that:

the bidirectional balance pull-cord switch of this design, through be equipped with the sliding block that can slip grafting in fixed plate bottom, make the device can fix on the cylinder of different diameters, can be fit for using under the outdoor fixed local circumstances that lacks, and the slipmat of arc splint inner wall, can prevent to take place to slide after fixing, increase device's fastness, and be equipped with the safety cover of grafting in the switch outside, can prevent that the switch body from being drenched by the rainwater and the inside dust that gets into of switch, can effectively prolong the life of switch.

Drawings

Fig. 1 is a sectional view of an overall structure of a bidirectional balanced pull-cord switch according to the present invention;

fig. 2 is a schematic view of an internal structure of a protective cover of a bidirectional balanced pull-cord switch according to the present invention;

fig. 3 is a sectional view of a fixing plate structure of a bidirectional balanced pull-cord switch according to the present invention.

In the figure: 1 fixed plate, 2 sliding tray, 3 cavitys, 4 sliding blocks, 5 first arc splint, 6 second arc splint, 7 draw-in grooves, 8 joint pieces, 9 safety covers, 10 through wires holes, 11 connecting rods, the solid fixed ring of 12, 13 switch bodies.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a bidirectional balance pull switch comprises a fixed plate 1, a sliding groove 2 is arranged on the outer wall of the bottom of the fixed plate 1, a cavity 3 is connected with one end of the sliding groove 2 close to the center of the fixed plate 1, a sliding block 4 is arranged in the cavity 3, a first arc-shaped clamping plate 5 is welded on the sliding block 4, the inner wall of the cavity 3 is matched with the sliding block 4, a semi-cylindrical stop strip is bonded on the inner wall of the bottom of the cavity 3, the diameter of the inner wall of the sliding groove 2 is matched with the diameter of the sliding block 4, the sliding groove 2 and the sliding block 4 are in sliding fit, a second arc-shaped clamping plate 6 is screwed on the first arc-shaped clamping plate 5 through a bolt, a clamping groove 7 is arranged on the outer wall of the periphery of the top of the fixed plate 1, anti-skid pads are bonded on the inner walls of the first arc-shaped clamping plate 5 and the second arc-shaped clamping plate 6, anti-skid threads are arranged on the outer walls of the anti-skid pads, clamping blocks 8 are welded on the inner walls of the clamping groove 7, and a protective cover 9 is welded on the clamping blocks 8, 7 inner wall diameters of draw-in groove and 8 diameter looks adaptations of joint piece, and draw-in groove 7 and joint piece 8 form interference fit, 9 both sides inner walls of safety cover all are equipped with the through wires hole 10 of symmetric distribution, and 9 top inner wall welding of safety cover have symmetric distribution's connecting rod 11, 11 bottom outer wall welding of connecting rod have solid fixed ring 12, and gu fixed ring 12 is fixed with switch body 13, 1 top outer wall of fixed plate bonds and has insulating pad, and switch body 13 passes through the bolt fastening on fixed plate 1.

The working principle is as follows: when using this two-way balance stay cord switch, at first with the welding have sliding block 4's first arc splint 5 slide to the sliding tray 2 inside, after sliding to the sliding tray 2 inside, press down sliding block 4 downwards, let sliding block 4 insert inside cavity 3, then anticlockwise rotation 90 degrees block sliding block 4, place first arc splint 5 on the round bar and use second arc splint 6 to fix, then use fastening bolt to fix switch body 13 on fixed plate 1, pass the stay cord again inside through wires hole 10, then peg graft safety cover 9 inside draw-in groove 7.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.