CN1746099A - Clutch brake - Google Patents

Abstract

A clutch-type brake arranged on the drive shaft for having the functions of both clutch and brake features that the driven part of friction clutch is fixed to spool, a band brake is arranged on the driven part of overriding clutch, the ratchet mechanism is used in conjunction with the band friction mechanism, and the ratchet mechanism is installed in the planetary clutch. It is used for hoister.

Description

Clutch brake

Technical field

The present invention relates to a kind of drg, it is engaging and disengaging gear and friction braking mechanism be combined into, especially use in weight-lifting equipment and can produce " self-locking ", prevent reversing, no longer make moving device, weight falls to not reinstating power, control by handle, but free fall, the underloading falling speed is fast, and zero load can be lost the clutch brake of hook.

Background technology

Known, electric clipper control brake, non-electricity and can not using, when the drg of other formulas uses on weight-lifting equipment,, can reverse when power stops can not producing " self-locking ", must control by the immediate operation drg, make troubles with dangerous to operation, and labour intensity is big; Though worm and wormwheel, has " self-locking " effect as the hoisting crane of driving device, non-power in lifting process and not work done, and its speed is single, at the bottom of the efficient; Ratchet device is a kind of device that possesses " braking " and two kinds of functions of clutch, be used in and prevent from the weight-lifting equipment to reverse, but it can only do intermittent moment, and continuous and high-speed operation incompatibility (combination is not steady) are therefore done following invention for overcoming its shortcoming spy.

Summary of the invention

The present invention will provide a kind of, use can possess " clutch " and " braking " dual-use function in weight-lifting equipment, be not subjected to the restriction of power kind, can with power stopping can to produce " self-locking " and prevent reversing, weight is not reinstated power in the whereabouts, only by the instantaneous velocity of its whereabouts of handle may command, it is fast that underloading falls, zero load can be lost hook, clutch brake easy and simple to handle.

The present invention solves the technical scheme that its technical matters takes: be by engaging and disengaging gear and stop mechanism be combined into.Both: the secondary part of friction clutch is fixed on the reel disc with the extension shaft suit of worm gear; On the secondary part of roller-type overrunning clutch, friction stopping device is being set; Allow ratchet device cooperate assembling with friction braking mechanism or planetary clutch.Be contained in this drg on the transmission shaft respectively or when combining with frame on the reel, the former is a bi-directional braking, back three is an one-way brake.

Obviously, if friction clutch is sleeved on the extension shaft of worm gear, and when making its secondary part be fixed on the reel disc that is slidingly connected with transmission shaft, under action of the spring, be in combination, reel can rotate synchronously with axle and do work, when power stops meeting " self-locking ", and oppositely only disengaged the clutch by handle, weight falls immediately.If the active of overriding clutch (star-wheel) is fixed on the transmission shaft, when its secondary part (shell) is fixed on the frame by the friction band indirectly, reel can only rotate to a direction as can be known, oppositely can produce " self-locking ", when remove be added in follower (shell) and go up friction force after, can and A end (star-wheel) rotate the same effect that has produced with above Worm and Worm Gear Driving synchronously.In like manner, when ratchet device and friction stopping device are used, as long as allow ratchet and friction wheel by key and bearing arranged side by side respectively combine with transmission shaft, and make its ratchet be fixed on the friction wheel combine will to possess clutch like this and brake dual-use function with ratchet by rotating shaft; When cooperating with planetary clutch, ratchet is fixed on when allowing its ratchet be fixed on the friction wheel combining corresponding with ratchet by rotating shaft on the drum shaft side by side with key and sun wheel driving gear, because friction wheel is to be fixed on the frame by the friction band, yet produced the former same effect in use, thereby reached the purpose of design.

The invention has the beneficial effects as follows: easy and simple to handle, safe ready, energy efficiency, comformability are strong.

Description of drawings

The present invention is further described below in conjunction with accompanying drawing and embodiment.

Fig. 1 is that friction clutch is sleeved on the assembling view that is combined into a drg on the worm gear extension shaft with reel.

Fig. 2 is the structure cutaway view of overdrive clutch formula drg.

Fig. 3 is a ratchet device and the structural representation of clutch brake after banded friction brake combines.

Fig. 4 is assemblied in the cutaway view of forming clutch brake in the planetary clutch with ratchet device.

The specific embodiment:

Among Fig. 11, output shaft; 2, spring; 3, thrust baring; 4, inner cone; 5, Outer Taper; 6, reel.

1. output shaft is to be connected with worm-wheel shaft or worm-wheel shaft is directly extended by drive coupling, obtains.3. and between the bearing seat, 3. thrust baring is sleeved on an inner cone end 4. spring two ends 2. are set in thrust baring, and 1. 4. inner cone gone up at output shaft by dive key or spline package.5. Outer Taper is fixed on a reel end (or cast solid) 6. and is 1. combined with output shaft by bearing.The inside and outside cone of thrust owing to spring on the position that stops is in engagement state, reel rotates with output shaft under the effect of friction moment, if inside and outside cone was in released state when handle was promoted left, reel can rotate arbitrarily, because worm and wormwheel possesses " self-locking " ability, promptly reaches design goal.

Among Fig. 21, star-wheel; 2, shell; 3, spring; 4, roller; 5, brake equipment.

1. star-wheel is fixed by key or sealing wire and transmission shaft, spring is housed 3. on it, with roller 4., shell 2. with star-wheel 1., by roller 4. in conjunction with transmission relatively, brake equipment 5. by friction band, curved handle, spring and adjusting fixedly the gong silk form, it rubs to be with and 2. smoothly combines with shell, change the size of friction force by spring with the cooperation of handle, also reach the purpose of clutch and brake.Obviously when star-wheel initiatively also rotated along clockwise direction, power-transfer clutch was in engagement state; When star-wheel rotated counterclockwise, power-transfer clutch was in released state.If shell drives star-wheel and rotates clutch engagement synchronously; When shell clockwise rotated, power-transfer clutch was in released state again.Effectively work done of power when selecting star-wheel 1. to rotate counterclockwise to the weight ascent direction yet 5. 2. shell be fixed up under the effect of elastic force by brake equipment, otherwise meeting " self-locking ", therefore in dropping process, only promote to make shell 2. to break away from friction drag to the right on handle with star-wheel rotates synchronously, under the effect of gravity, do not reinstate power controollable instantaneous velocity weight whereabouts.

Among Fig. 31, ratchet; 2, friction wheel; 3, ratchet; 4, friction band; 5, handle.

Ratchet is fixed on the transmission shaft by key or sealing wire, friction wheel 2. be superimposed upon ratchet 1. before or after, combine with transmission shaft by bearing, can 1. relatively rotate with ratchet, 3. ratchet is fixed on friction wheel by rotating shaft and 2. goes up, and is embedded in the ratchet under the effect of spring.2. 4. the friction band smoothly combine with friction wheel; 5. handle is fixed on the frame by rotating shaft, is fixed up friction wheel is 2. as the same under the spring tension effect.Yet, when transmission shaft rotates counterclockwise ratchet and 1. 3. separates with ratchet, be the weight ascent direction, when rotating on the contrary, the two joint, both by " self-locking ", reel can not reverse, if 5. handle is moved to the right, friction wheel 2. and the friction force of friction band between 4. reduce gradually, weight can quicken, and 5. its speed controlled by handle.

Among Fig. 41, ratchet; 2, friction wheel; 3, ratchet; 4, friction band; 5, internally toothed annulus; 6, fixed star driving gear; 7, tri-star wheel; 8, reel.

6. 1. ratchet from left to right be fixed on the drum shaft by key side by side with the fixed star driving gear.3. ratchet is fixed on friction wheel inboard 2. and the 1. corresponding combination of ratchet by rotating shaft.Tri-star wheel 7. is fixed on the reel reel disc 8. respectively the internally toothed annulus of 2. going up with friction wheel by rotating shaft and the fixed star driving gear that is fixed on the drum shaft is 6. meshing mutually.When 4. friction band combined with friction wheel under the effect at elastic force, if the rotatable acting of reel when ratchet clockwise rotates to ascent direction, oppositely meeting " self-locking " was with 4. separation if will rub, and 2. friction wheel will rotate synchronously with reel.Therefore as long as the operation brake-applying handle just can be controlled the purpose that the falling speed of weight also reaches design.

Claims (5)

1. a clutch brake is by engaging and disengaging gear and stop mechanism be combined into, it is characterized in that, the secondary part of friction clutch is fixed on the reel disc cooperate with worm and wormwheel; On the secondary part of roller-type overrunning clutch, friction stopping device is being set; Allow ratchet device and friction braking mechanism or planetary clutch adapting device.

2. clutch brake according to claim 1 is characterized in that, when friction clutch and worm and wormwheel are used, the secondary part of friction clutch is fixed on the reel disc, with the worm gear extension shaft by the bearing suit.

3. clutch brake according to claim 1 is characterized in that, if with the roller-type overrunning clutch assembling, then be provided with friction stopping device on secondary part.

4. clutch brake according to claim 1, it is characterized in that, when employing ratchet device and the assembling of friction braking mechanism, and ratchet and friction wheel are combined on the transmission shaft side by side by key and bearing respectively, and its ratchet is fixed on corresponding combination with ratchet on the friction wheel by rotating shaft.

5. clutch brake according to claim 1, it is characterized in that, as with wheel mechanism and the timing of planetary clutch combining device, ratchet and fixed star driving gear are fixed on side by side by key on the transmission shaft of reel, and its ratchet is fixed on corresponding combination with ratchet on the friction wheel side by rotating shaft.

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