CN101139072A

CN101139072A - Safe type electric hoister

Info

Publication number: CN101139072A
Application number: CNA2007101803958A
Authority: CN
Inventors: 饶建明
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-24
Filing date: 2007-10-24
Publication date: 2008-03-12
Anticipated expiration: 2027-10-24
Also published as: CN100532246C

Abstract

The structure of a safety electric winch with a safety device comprises that a motor and a drum are respectively connected with an input shaft and an output shaft of a gearbox, all of which are fixed on a frame together, and rotation direction of the motor and the drum is controlled by a controller. The winch is characterized in that a rope inlet of a drum of the winch is provided with a height limitation device, and the height-limit device can prevent a steel rope from sliding out of the drum and is pulled apart by gravity when the steel rope is rolled too fully on the drum and is higher than a baffle; the drum is provided with a limit device for few steel ropes inside, the limit device for few steel ropes can prevent the steel rope from pulling out of the drum by heavy weight when few steel ropes are left on the drum; the two sides of the frame is provided with an adjustment rod which can adjust the position of the winch at any time. The present invention arranges the height-limit device, the limit device for few steel ropes and the adjustment rod structure on the electric winch initially, therefore, accident rate of the winch can be effectively reduced and economic loss of the country and people is reduced.

Description

A kind of safe type electric hoister

Technical field

The invention belongs to a kind of lifting gear, relate in particular to a kind of electric winch.

Background technology

In lifting work, electric winch is usually used in lifting or tractor equipment.The structure of existing electric winch generally is: electrical motor is by connecting the input shaft of change speed gear box around the property coupler, the output shaft of reel and change speed gear box connects together, be fixed on together on the frame, by the rotation direction of controller control motor, magnet stopper is installed in the middle part around the property coupler.Its principle of work is: energized at first, come as required again selection control control handle this be placed on the position of " lifting ", " decline " or " zero ".When controller level is pulled " lifting " position, electrical motor just begins to rotate, chain magnet stopper can be opened simultaneously, electrical motor rotates by the input shaft that drives change speed gear box around the property coupler, rotate through the gear driven output shaft in the change speed gear box, the rotation of spool in response output shaft and rotating, and with wire rope roll on reel, reach and promote or the purpose of traction weight.When controller level turns back " zero " position, power interruption, electrical motor stops operating, and reel stops operating thereupon, hangs thing and also just stops to rise, and behind the magnet stopper outage loss of excitation, just firmly embraces around the property coupler, and reel can not rotated because of the effect of weight.Otherwise when controller level was pulled the position of " decline ", electrical motor is counter-rotation then, thereby steel rope is withdrawed from from reel, made to hang thing decline.

The electric winch of said structure is not noted slightly or misoperation in operating process, just the various person and equipment breakdown may be taken place; After winch is installed firmly, in uphill process, because of being subjected to the effect of weight pulling force, after the fixedly colligation rope tension with winch and first haul block, position between them is changed, the steel rope that causes drawing on the reel is not orthogonal to reel, also just can not be on reel marshalling, can only overlappingly twist in same position, what the steel rope of this position will be very fast so exceeds the baffle plate on the reel limit and skids off reel, makes weight lose pulling force suddenly, and descend fast, produce very big impulsive force, be easy to steel rope is broken, thereby cause the accident; Winch is in the decline process, along with the decline of weight, steel rope remaining number of turns on reel is fewer and feweri, when being less than the number of turns of " safety regulation for operations " regulation, the pulling force of weight just might be pulled out steel rope from the attachment point of reel, make behind the suspended object get out of hand and cause the accident.The accident that above reason produces is occupied very high ratio in the accident that winch took place, the reason of the existing manual operation of these accidents, and employed electric winch also exists potential safety hazard.

Summary of the invention

In order to solve the existing safety defect of above-mentioned winch, the present invention aim to provide a kind of easy for installation, adjust simply, have the electric winch of multiple safety device, adopt this winch after, can effectively reduce the accident rate of winch, reduce unnecessary loss to the country and people.

In order to achieve the above object, the present invention has adopted following technical scheme: the electrical motor of this safe type electric hoister and reel are connected the input shaft and the output shaft of change speed gear box respectively, be fixed on the frame together, by their rotation direction of controller control, it is characterized in that: at the mouth of going into to restrict of lifting drum, installation can prevent steel rope roll up on the reel too completely exceed baffle plate after, the height limiter that skids off reel and broken by gravity; In reel, install can prevent steel rope on the reel remaining very few after, pulled out the few device of limit of reel by weight; And the adjusting lever that can adjust the winch position at any time is set in the frame both sides.

The height limiter of present embodiment is made of rope processing device and limit for height cut-off switch, when steel rope is overlapping when twisting in a place or having other object to be involved in reel along with steel rope, as long as steel rope exceeds the baffle plate on the reel limit, the outage pressing plate just can in time be pressed down the limit for height cut-off switch, make winch stop vertical motion, guarantee that steel rope can not skid off reel.

The few device of the limit of present embodiment by resilient pegs, telescopic tongue, the few cut-off switch of limit, resetting to meet and discuss constitutes, winch is in the decline process, as long as steel rope remaining number of turns on reel is less than the regulation number of turns, the outage probe just can in time be pressed the few cut-off switch of lower limit, cut off the electricity supply, make winch stop down maneuver, guarantee that steel rope can not break away from the attachment point on the reel.

The adjusting lever of present embodiment is symmetricly set on the both sides of frame, is made up of moving screw, standing screw, adjustment silk braid and jam nut, makes winch easy for installation, can also in use adjust the position of winch.

The present invention is compared with prior art: owing to adopted height limiter, the few device of limit and adjusting lever structure, on electric winch, be provided with safety device first, therefore, that the position of winch can be adjusted when mounted is more accurate, in use, can not occur because steel rope roll up on the reel too completely exceed baffle plate after, the phenomenon that skids off reel and broken by gravity, and steel rope on the reel remaining very few after, pulled out the phenomenon of reel by weight, effectively reduce the accident rate of winch, reduce economic loss to the country and people.

Description of drawings

Fig. 1 is the birds-eye view of one embodiment of the invention.

Fig. 2 is the right elevation of one embodiment of the invention.

Fig. 3 is the structural representation of rope processing device among Fig. 1 (20).

Fig. 4 is the structural representation of resilient pegs among Fig. 1 (30) and telescopic tongue (40).

Sequence number is represented respectively among the figure: 10. frame, 101. electrical motors, 102. change speed gear boxs, 103. reels, 104. controller, 105. around property coupler, 106. magnet stoppers, 107. baffle plates, 108. brake handle, 109. pressure knobs, 20. rope processing devices, 201. press rope drum, 202. the turning cylinder position, 203. stressed platforms, 204. bracket axles, 205. spacing pressing plates, the spring 206. exert pressure, 207. shaft alignment seats, 208. axis of rolling, 209. carriage, 210. limit for height cut-off switchs, 30. resilient pegs, 301. the pressurized key, 302. securing cover plates, 303. location lateral pins, 304. the distribution spring, 305. inclined-plane plugs, 306. resilient pegs jacks, 40. telescopic tongue, 401. outage probes, 402. Fixed latches, 403. the location pile crown, 404. springs, 405. slide covers, 406. the few cut-off switch of limit, 407. reset meets and discusses, 408. spring mouths, 409. the telescopic tongue jack, 50. adjusting levers, 501. moving screws, 502. standing screw, 503. adjust silk braid, and 504. adjust mouth, 505. jam nut, 506. communication ports, the mouth of going into to restrict of A. reel.

The specific embodiment

Referring to Fig. 1 and in conjunction with Fig. 2,3,4, compared with prior art the present invention has made the novelty improvement in reel (103) and frame (10), height limiter, few device of limit and adjusting lever (50) are well combined with the winch structure of prior art, the involved structure of present embodiment comprises: electrical motor (101) is by linking to each other around the input shaft of property coupler (105) with change speed gear box (102), the output shaft of reel (103) and change speed gear box (102) is associated in together, be fixed on together on the frame (10), the rotation direction of controller (104) control motor (101), in frame (10) bilateral symmetry adjusting lever (50) is set, height limiter is installed in the mouth of going into to restrict of reel (103), and the few device of limit is installed on the frame (10) of reel (103) inside and avris.

Height limiter is made of rope processing device (20) and limit for height cut-off switch (210), rope processing device (20) is by carriage (209), press rope drum (201), the axis of rolling (208), shaft alignment seat (207) and the spring of exerting pressure (206) are formed, end at carriage (209) is provided with bracket axle (204), the spring (206) of exerting pressure is enclosed within bracket axle (204) middle part, shaft alignment seat (207) is located at two, and carriage (209) is fixed on the frame (10), turning cylinder position (202) is located at the other end of carriage (209), bearing is equipped with in portion within it, the axis of rolling (208) is enclosed within bearing inner ring, pressing rope drum (201) to be divided into three sections is fixed on the axis of rolling (208), the external diameter of its external diameter and turning cylinder position (202) is consistent, under the effect of the spring of exerting pressure (206), be close to reel (103), rotate along with the rotation of reel (103).When winch promotes weight, volume is many more more on reel (103) for steel rope, gap between pressure rope drum (201) and the reel (103) is along with increase, spacing pressing plate (205) is slowly close limit for height cut-off switch (210) just, when the height of steel rope surpasses baffle plate (107) on reel (103) limit, spacing pressing plate (205) is just pressed down limit for height cut-off switch (210), with supply disconnecton, makes winch stop rising work.Spacing pressing plate (205) and stressed platform (203) are installed in the both sides of carriage (209) respectively, stressed platform (203) is under the effect of pressure knob (109), can back down a segment distance with pressing between rope drum (201) and the reel (103), be convenient to go up the installation steel rope at reel (103).Limit for height cut-off switch (210) is installed in the pressure stroke of spacing pressing plate (205), and is connected by electrical wiring in the rising circuit of controller (104).

The few device of limit is by resilient pegs (30), telescopic tongue (40), the few cut-off switch (406) of limit and (407) formation of meeting and discussing that resets, the head of resilient pegs (30) is provided with inclined-plane plug (305), afterbody is provided with pressurized key (301), the centre is provided with location lateral pin (303) and promotes spring (304), and the cover plate that is fixed (302) is positioned in the resilient pegs jack (306).When the pressure of steel rope acts on the pressurized key (301), inclined-plane plug (305) enters in the telescopic tongue jack (409), outwards eject by location pile crown (403) restriction telescopic tongue (40), when the pressure of steel rope is cancelled, inclined-plane plug (305) is under the effect of promoting spring (304), return in the resilient pegs jack (306), at this moment pressurized key (301) exceeds reel (103) outer ring, inclined-plane plug (305) breaks away from location pile crown (403), telescopic tongue (40) can outwards eject, two of telescopic tongue (40) is provided with spring mouth (408) and outage probe (401) respectively, location pile crown (403) is located at the middle part, Fixed latches (402) heads on location pile crown (403) telescopic tongue (40) is fixed in the telescopic tongue jack (409), when being subjected to resilient pegs (30) restriction, outage probe (401) is parked in the telescopic tongue jack (409), and reel (103) can normal rotation.When not having the restriction of resilient pegs (30), spring (404) is extrapolated with telescopic tongue (40), when treating that outage probe (401) stretches out baffle plate (107) outside, location pile crown (403) just pushes up Fixed latches (402), make telescopic tongue (40) stop outside motion, at this moment outage probe (401) can just be pressed the few cut-off switch (406) of lower limit, outage probe (401) is arranged to the plane with the contact surface of the few cut-off switch (406) of limit, can better press the few cut-off switch (406) of lower limit, cut off the power supply that winch descends.The few cut-off switch (406) of limit is installed on the frame (10) of telescopic tongue jack (409) one sides, and is connected by electrical wiring in the decline circuit of controller (104).Outage probe (401) is arranged to the inclined-plane with the meet and discuss contact surface of (407) of resetting, run into when outage probe (401) and to reset when meeting and discussing (407), the inclined-plane conicity force that produced of (407) extruding of meeting and discussing that is subjected to resetting, the probe (401) that will cut off the power supply advances in the telescopic tongue jack (409) again, reset meet and discuss (407) be installed in the top of the few cut-off switch (406) of limit.Slide cover (405) is arranged on the limit, hole of telescopic tongue jack (409), can slidably reciprocate, and can block telescopic tongue (40) when skidding off and outwards eject.

Adjusting lever (50) is made of moving screw (501), standing screw (502), adjustment silk braid (503) and jam nut (505), symmetry is installed in the both sides of frame (10), adjust two of silk braid (503) and be arranged to positive pitch thread and anti-pitch thread respectively, standing screw (502) becomes positive tooth screw and anti-tooth screw with moving screw (501) also relative set.Adjust mouthful (504) and be located at the middle part of adjusting silk braid (503) outer ring, when rotating adjustment silk braid (503) by adjusting mouthful (504), standing screw (502) and moving screw (501) are understood indentation simultaneously or are stretched out and adjust silk braid (503), reach the purpose of adjusting the winch position, after adjusting to the right place, tighten jam nut (505), make moving screw (501) more firm when being subjected to pulling force, safer.Connecting bore (506) is located at the end that moving screw (501) does not have screw thread, and winch is connected on the attachment point by connecting bore (506).

The application of present embodiment in real work: at first couple together with the connecting bore (506) and the attachment point of colligation rope with winch, if the position of winch line of centers and first haul block is inconsistent, can rotate adjustment silk braid (503) by adjusting mouthful (504), when adjusting to the position consistency of winch line of centers and haul block, tighten the position of jam nut (505) wire rope hoist again, if winch in use is shifted, want earlier jam nut (505) to be unscrewed, rotate again and adjust silk braid (503), after adjusting to the right place in the position, again jam nut (505) is tightened.

When reel (103) is gone up the installation steel rope, tighten pressure knob (109) earlier, stressed platform (203) is under pressure behind (109) application force of knob, make to press between rope drum (201) and the reel (103) and open certain clearance, to cut off the power supply, telescopic tongue jack (409) is interior to be blocked with slide cover (405) probe (401) by advancing again, outage probe (401) can not outwards be ejected, steel rope one is fixed on the reel (103) then, again controller level (108) is pulled the position of " rising ", with wire rope roll on reel (103), when being rolled onto the number of turns of regulation, just be pressed on the pressurized key (301), the inclined-plane plug (305) of resilient pegs (30) by advancing in the telescopic tongue jack (409), has been limited location pile crown (403) telescopic tongue (40) can not outwards be ejected.After steel rope installs, in time pressure knob (109) and slide cover (405) are returned to original position.

Winch is in uphill process, as when occurring that steel rope is overlapping to twist in a place or have foreign matter to go up to reel (103) along with wire rope roll, as long as the height of steel rope surpasses the baffle plate (107) on reel (103) limit, outage pressing plate (205) just can in time be pressed down limit for height cut-off switch (210), cut off the rising power supply, make winch stop rising work, has only the position of controller level (108) being pulled " decline ", make overlapping steel rope withdraw from reel (103), after the trouble-shooting, winch could recover normal operation.

Winch is in the decline process, it is fewer and feweri that steel rope is gone up the remaining number of turns at reel (103), to the regulation the number of turns time, because pressurized key (301) loses the pressure of steel rope, under the effect of promoting spring (304), resilient pegs (30) outwards ejects, inclined-plane plug (305) just can not limit location pile crown (403), telescopic tongue (40) then ejects to baffle plate (107) outside, outage probe (401) is in time pressed the few cut-off switch (406) of lower limit, cut off the decline power supply, make winch stop decline work.Like this, the steel rope on the reel (103) just can not be pulled out attachment point by weight.At this moment as long as control handle (108) is pulled " rising " position, reel (103) is rotated to ascent direction, steel rope again the inclined-plane plug (305) of resilient pegs (30) by advancing in the telescopic tongue jack (409), outage probe (401) is just run into meet and discuss (407) that reset simultaneously, under the effect of (407) of meeting and discussing that resets, outage probe (407) is pushed into again in the telescopic tongue jack (409), again by inclined-plane plug (305) restriction, makes the winch again can normal operation.

In sum: the present invention has well solved the electric winch of prior art in use can not directly adjust the position, and the problem that potential safety hazard is arranged in process of rising or falling, a kind of safe type electric hoister that can replace existing product is provided.

Claims

1. safe type electric hoister, its structure comprises, electrical motor (101) and reel (103) are connected the input shaft and the output shaft of change speed gear box (102) respectively, be fixed on together (10) on the frame, by their rotation direction of controller control, it is characterized in that:, height limiter is installed at the mouth of going into to restrict of lifting drum (103); The few device of limit is installed in reel (103) and on the frame; And at frame bilateral symmetry installation adjusting lever (50).

2. as claim 1 described a kind of safe type electric hoister, height limiter is made of rope processing device (20) and limit for height cut-off switch (210), rope processing device (20) is by carriage (209), press rope drum (201), the axis of rolling (208), shaft alignment seat (207) and the spring of exerting pressure (206) are formed, carriage (209) is installed on the frame (10), bracket axle (204) is set respectively at its two ends and presses rope drum (201), spacing pressing plate (205) and stressed platform (203) are located at its both sides, limit for height cut-off switch (210) is installed in the pressure stroke of spacing pressing plate (205), and is connected by electrical wiring in the rising circuit of controller (104).

3. as claim 1 described a kind of safe type electric hoister, the few device of limit is by resilient pegs (30), telescopic tongue (40), the few cut-off switch (406) of limit, (407) formation of meeting and discussing resets, the head of resilient pegs (30) is provided with inclined-plane plug (305), afterbody is provided with pressurized key (301), the centre is provided with location lateral pin (303) and promotes spring (304), the cover plate (302) that is fixed is positioned in the resilient pegs jack (306), two of telescopic tongue (40) is provided with spring mouth (408) and outage probe (401) respectively, location pile crown (403) is located at the middle part, Fixed latches (402) heads on location pile crown (403) telescopic tongue (40) is fixed in the telescopic tongue jack (409), slide cover (405) is arranged on the limit, hole of telescopic tongue jack (409), the few cut-off switch (406) of limit is installed on the frame (10) of telescopic tongue jack (409) one sides, and be connected by electrical wiring in the decline circuit of controller (104), reset meet and discuss (407) be installed in the top of the few cut-off switch (406) of limit.

4. as claim 1 described a kind of safe type electric hoister, adjusting lever (50) is symmetricly set on the both sides of frame (10), form by moving screw (501), standing screw (502), adjustment silk braid (503) and jam nut (504), adjust (504) and be located at the middle part of adjusting silk braid (503) outer ring, connecting bore (506) is located at the end that moving screw (501) does not have screw thread.