CN209291843U - It is a kind of without underloading Lever Blocks - Google Patents

Abstract

The utility model specifically discloses a kind of without underloading Lever Blocks, including hook, gear cover and ratchet casing are fixed with below hook, long axis is fixed between gear cover and ratchet casing, it is disposed with gear train assembly from left to right on long axis, wallboard I, sprocket wheel, wallboard II, brake seat, friction plate I, ratchet, friction plate II, load limiter seat, commutate ratchet, handle and locking nut, pin shaft is fixed on wallboard II, torsional spring and pawl II are arranged on pin shaft, brake seat outer rim includes the brake tooth for being uniformly distributed and matching with pawl II, slide switch is provided on ratchet casing, switch includes the clicking section being arranged in outside ratchet casing and the contact portion being arranged in ratchet casing.The utility model provide it is a kind of it is easy to operate without underloading raising Lever Blocks, it had not only been able to achieve no-load or light condition lower chain raising, but also be able to achieve the chain in hoisting heavy and empty zip strip and rise, increase the operation strategies of Lever Blocks.

Description

It is a kind of without underloading Lever Blocks

Technical field

The utility model relates to lifting lifting appliance fields, more particularly, to a kind of Lever Blocks.

Background technique

As a kind of using the minor crane tool equipment simple, easy to carry being widely used, its raising is cucurbit Passing through swinging handle using leverage principle, the commutation pawl on handle acts on commutation ratchet and makes the ratchet wheel that commutates, Commutation ratchet wheel is realized with movable sprocket rotation.

There is the Lever Blocks of model HSH-VP616-0.8T a kind of on the market, above-mentioned Lever Blocks includes hanging oneself Hook is fixed with gear cover and ratchet casing below hook, long axis is fixed between gear cover and ratchet casing, on long axis from a left side to The right side is disposed with gear train assembly, wallboard I, sprocket wheel, wallboard II, brake seat, friction plate I, ratchet, friction plate II, changes To ratchet, handle and locking nut, it is wound with matched chain on sprocket wheel, is fixed with lower suspension hook, friction plate below chain I, ratchet and friction plate II are set on brake seat, and pawl I is fixed on wallboard II, and pawl I blocks ratchet, are commutated under ratchet Side is provided with commutation pawl, and commutation pawl is fixed on handle.Although above-mentioned cucurbit energy hoisting heavy, to some particular rows Industry, such as the electric power industry for needing high-altitude to set up tensioning cable, the weight of traction rope is often very before cable is tensioned Gently, if will be unable to tense cable using above-mentioned Lever Blocks operator.Because of the reason of cucurbit operating position and for people Work is easy to operate, and handle generally requires to rotate by reciprocating rotation band movable sprocket, and above-mentioned Lever Blocks is hung in the case where no underload is In the case that hook does not hang weight or hanging weight kicks the beam, when rotary handle, due to no enough weight reaction forces, chain Wheel can be turned round with handle, and final chain is with the reciprocating rotation oscilaltion of handle, therefore the Lever Blocks is not without at light load can Accomplish effective raising.

An a kind of entitled utility model without underloading Lever Blocks is disclosed in CN201420476145.4, including Casing, is provided with long axis in casing, and long axis is sequentially arranged brake seat, ratchet, commutation ratchet, cam, handwheel from the inside to the outside And torsion spring seat, the first torsional spring is set between torsion spring seat and handwheel and carrys out pressing handwheel, setting second is turned round between handwheel and commutation ratchet Spring compresses commutation ratchet, and the first torsional spring is torsional spring counterclockwise, the second torsional spring is torsional spring clockwise, and the torsion of the first torsional spring is big In the torsion of the second torsional spring；It is additionally provided with mounting plate in shell, pawl one and pawl two, pawl one and spine are provided on mounting plate Center line symmetrical setting of the pawl two relative to ratchet.It is gone up and down although above-mentioned patent is also able to achieve without underloading, in no light condition When need to extract handwheel, when lifting state, need to push down handwheel and be just able to achieve, needed due to extracting handwheel and pushing down the movement of handwheel Completion is operated in the sky, therefore there is a problem of inconvenient.

Disclose the Lever Blocks structure with limit for tonnage in CN201720088167.7, including long axis and on long axis Chain hoist wheel, brake seat, ratchet, load limiter seat, the commutation ratchet, the commutation spine being arranged in below commutation ratchet set gradually Pawl, the ratchet sleeve is on brake seat, and the commutation ratchet sleeve is on load limiter seat, it is characterised in that: the commutation pawl Including rising working end, decline working end and small torsional spring, the decline working end is arranged on shifting block axis, the rising working end It is hinged with decline working end by articulated section and connect by small torsional spring with decline working end, rise the outer of working end equipped with blocking Conjunction portion separates or is closed with decline working end around articulated section rotation with working end is risen, the lower end of the commutation pawl It is contacted with push rod spring.The structure of above-mentioned patent disclosure is able to achieve the limit for tonnage function of Lever Blocks, but can not achieve hand and pull calabash Reed without underloading lifting functions.

Utility model content

It is easy to operate without underloading Lever Blocks that the purpose of this utility model is to provide one kind, had both been able to achieve no-load or light Load state lower chain raising, and be able to achieve the chain in hoisting heavy and empty zip strip and rise, increase the utilization of Lever Blocks Range.

The utility model is achieved by the following technical solution, a kind of without underloading Lever Blocks, including hook, on Gear cover and ratchet casing are fixed with below suspension hook, long axis is fixed between gear cover and ratchet casing, on long axis from left to right according to It is secondary to be provided with gear train assembly, wallboard I, sprocket wheel, wallboard II, brake seat, friction plate I, ratchet, friction plate II, load limiter Seat, commutate ratchet, handle and locking nut, and matched chain is wound on sprocket wheel, lower suspension hook is fixed with below chain, rubs Pad I, ratchet and friction plate II are set on brake seat, and pawl I is fixed on wallboard II, and pawl I blocks ratchet, spine of commutating Wheel lower section is provided with commutation pawl, and commutation pawl is fixed on handle, pin shaft is fixed on wallboard II, is arranged with torsional spring on pin shaft With pawl II, brake seat outer rim includes the brake tooth for being uniformly distributed and matching with pawl II, is provided with cunning on ratchet casing Dynamic switch, slide switch include the clicking section being arranged in outside ratchet casing and the contact portion that is arranged in ratchet casing.

The working principle of this programme is: stir slide switch clicking section make the contact portion of slide switch not with pawl II When squeezing contact, pawl II blocks the brake tooth on brake seat under the action of torsional spring, and Lever Blocks, which is in, at this time has nothing It is lightly loaded enhanced feature state.When hook load-free under cucurbit or underloading, handle is pulled clockwise, and commutate ratchet wheel pressing friction piece II, ratchet, friction plate I and brake seat, brake seat rotation drive long axis to rotate clockwise, and long axis rotates clockwise to be passed through again Gear train assembly band movable sprocket rotates, so that chain be made to rise；When rotary handle, effect of the commutation ratchet in locking nut Under have the tendency that drive long axis turning anticlockwise, but because the frictional resistance between brake seat and pawl II be greater than commutation pawl pair The frictional force of commutation ratchet is so that brake seat cannot turn round, therefore long axis does not also turn round, and chain does not decline, so that chain Item is not with the reciprocating rotation oscilaltion of handle.Lever Blocks, which is in, to be had without underloading enhanced feature state, when suspension hook under cucurbit When lifting has weight, handle is pulled clockwise, commutate ratchet wheel pressing friction piece II, ratchet, friction plate I and brake seat, Brake seat rotation drives long axis to rotate clockwise, and long axis rotates clockwise to be made by gear train assembly band movable sprocket rotation again Chain rises, thus lifting heavy；When rotary handle, because weight reaction force makes brake seat, friction plate I, ratchet, rubs Pad II and commutation ratchet mutually compress, and wherein ratchet cannot turn round under pawl I effect, therefore long axis cannot turn round, sprocket wheel Also it does not turn round, chain does not decline.

When stirring the clicking section of slide switch contacts the contact portion of slide switch and pawl II extruding, pawl II and braking Brake tooth on device seat disengages, and brake seat is not influenced to rotate clockwise but also rotate counterclockwise by pawl II, and hand is pulled Cucurbit, which is in, closes without underloading enhanced feature state.At this point, pulling handle clockwise when hook load-free or underloading under cucurbit, changing To ratchet wheel and pressing friction piece II and ratchet, friction plate I, brake seat, brake seat rotation drives long axis to turn clockwise Dynamic, long axis rotates clockwise to be rotated increase chain by gear train assembly band movable sprocket again；When rotary handle, commutation Ratchet drives long axis to turn round under the action of locking nut, and long axis revolution makes sprocket wheel revolution to make by gear train assembly Obtain chain drop.Cucurbit is closed without underloading enhanced feature, and lower hook load-free or at light load, chain can not be promoted effectively.Work as cucurbit When lower suspension hook lifting has weight, handle, commutation ratchet wheel pressing friction piece II, ratchet, friction plate I and braking are pulled clockwise Device seat, brake seat rotation drive long axis to rotate clockwise, and long axis rotates clockwise again through gear train assembly band movable sprocket Rotation is to make chain rise lifting heavy；When rotary handle, because weight reaction force make brake seat and friction plate I, Ratchet, friction plate II, commutation ratchet mutually compress, and wherein ratchet cannot turn round under pawl I effect, therefore long axis cannot return Turn, sprocket wheel does not also turn round, and chain does not decline.

The use principle of this programme is: stirring slide switch clicking section contacts contact portion with pawl II extruding, opens When with without underloading enhanced feature, pawl II blocks the brake tooth on brake seat, lower hook load-free or light under the action of torsional spring In the case where load, handle is pulled clockwise, and chain rises, and rotary handle, chain, which does not rise, also not to be declined；Lower suspension hook hoisting heavy In the case where, handle is pulled clockwise, and chain rises, and rotary handle, chain, which does not rise, also not to be declined.Slide switch is stirred to stir Portion contacts contact portion with pawl II extruding, and the brake tooth on pawl II and brake seat disengages, and closes without underloading enhanced feature When, in the case where lower hook load-free or underloading, pull handle clockwise, chain rises, rotary handle, chain drop；Lower suspension hook In the case where hoisting heavy, handle is pulled clockwise, and chain rises, and rotary handle, chain, which does not rise, also not to be declined.It realizes above-mentioned The pawl that commutates when function blocks commutation ratchet, and when the pawl that commutates is disengaged with commutation ratchet, handle idle running at this time can empty zip strip Just chain may make to rise or fall.

The beneficial effect of this programme is: 1. is easy to operate, has not only been able to achieve no-load or light condition lower chain raising, but also energy Realize that chain rises in hoisting heavy and empty zip strip.

2. the effect that two pawl I are arranged in the symmetric position on wallboard II centered on long axis is to block pawl I Ratchet one-directionally rotate it can only, and compared to only braking of the one pawl I of setting to ratchet in braking on wallboard II Power can more greatly and more evenly.

3. in the present invention, the effect of ratchet casing and handle rotation connection is not shadow in the case where handle capable of being rotation Ring protection of the ratchet casing to components between wallboard II and handle.

4. in the present invention, when locking nut compresses brake seat, friction plate I, ratchet, friction plate II, commutation spine Wheel and when handle, is arranged fluted on the ratchet that commutates, friction plate II matches recessed compared to being not provided on the ratchet that commutates with groove Slot is more advantageous to the transmitting of frictional force between commutation ratchet and friction plate II.

Detailed description of the invention

Fig. 1 is stereoscopic schematic diagram of the utility model without underloading Lever Blocks specific embodiment.

Fig. 2 is explosion signal on the right side of wallboard II and wallboard II of the utility model without underloading Lever Blocks specific embodiment Figure.

Fig. 3 is that the utility model is cutd open without part when having without underloading enhanced feature of underloading Lever Blocks specific embodiment Depending on schematic diagram.

Fig. 4 is when not having without underloading enhanced feature part of the utility model without underloading Lever Blocks specific embodiment The schematic diagram of section view.

In figure: 1. hooks, 21. gear covers, 22. ratchet casings, 221. through-holes, 222. groove I, 3. long axis, 30. wallboard I, 31. sprocket wheel, 311. chains, 312. lower suspension hooks, 32. wallboard II, 321. pawl I, 322. pin shafts, 323. torsional springs, 324. pawl II, 33. brake seat, 331. brake tooths, 34. friction plate I, 35. ratchets, 36. friction plate II, 37. load limiter seats, 38. commutation spine Wheel, 39. handles, 391. inner handles, 392. outdoor handles, 393. commutation pawls, 40. locking nuts, 5. slide switches, 51. are stirred Portion, 52. contact portions.

Specific embodiment

It will describe in detail in conjunction with specific embodiments with reference to the accompanying drawings below.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of without Lever Blocks, including hook 1 is lightly loaded, it is fixed below hook 1 There are gear cover 21 and ratchet casing 22, long axis 3 is fixed between gear cover 21 and ratchet casing 22, on long axis 3 from left to right successively It is provided with gear train assembly, wallboard I30, sprocket wheel 31, wallboard II32, brake seat 33, friction plate I34, ratchet 35, friction plate II36, load limiter seat 37, commutate ratchet 35, handle 39 and locking nut 40, is wound with matched chain on sprocket wheel 31 311, lower suspension hook 312 is fixed with below chain 311, and friction plate I34, ratchet 35 and friction plate II36 are set in brake seat 33 On, pawl I321 is fixed on wallboard II32, pawl I321 blocks ratchet 35, is provided with commutation pawl below the ratchet 35 that commutates 393, commutation pawl 393 is fixed on handle 39, and pin shaft 322 is fixed on wallboard II32, torsional spring 323 is arranged on pin shaft 322 With pawl II324,33 outer rim of brake seat includes the brake tooth 331 for being uniformly distributed and matching with pawl II324, ratchet casing Sliding is provided with slide switch 5 on 22, and slide switch 5 includes the clicking section 51 being arranged in outside ratchet casing 22 and is arranged in ratchet casing Contact portion 52 in 22.

The working principle of this programme is: stir slide switch 5 clicking section 51 make the contact portion 52 of slide switch 5 not with When pawl II324 squeezes contact, pawl II324 blocks the brake tooth 331 on brake seat 33 under the action of torsional spring 323, this When Lever Blocks be in have without underloading enhanced feature state.When 312 no-load of suspension hook or underloading under cucurbit, handle is pulled clockwise 39, commutation ratchet 35 rotates pressing friction piece II36, ratchet 35, friction plate I34 and brake seat 33, and brake seat 33 rotates band Dynamic long axis 3 rotates clockwise, and long axis 3 rotates clockwise to be rotated by gear train assembly band movable sprocket 31 again, to make chain 311 rise；When rotary handle 39, commutation ratchet 35 has under the action of locking nut 40 drives 3 turning anticlockwise of long axis Trend, but because the frictional resistance between brake seat 33 and pawl II324 is greater than the friction of commutation 393 pairs of commutation ratchets 35 of pawl Power is so that brake seat 33 cannot turn round, therefore long axis 3 does not also turn round, and chain 311 does not decline, so that chain 311 is not With the reciprocating rotation oscilaltion of handle 39.Lever Blocks, which is in, to be had without underloading enhanced feature state, when suspension hook 312 under cucurbit Lifting is when having weight, pulls handle 39 clockwise, commutation ratchet 35 rotate pressing friction piece II36, ratchet 35, friction plate I34 and Brake seat 33, the rotation of brake seat 33 drive long axis 3 to rotate clockwise, and long axis 3 rotates clockwise passes through pinion unit again Regiment commander's rotation of movable sprocket 31 rises chain 311, thus lifting heavy；When rotary handle 39, because weight reaction force makes Brake seat 33, friction plate I34, ratchet 35, friction plate II36 and commutation ratchet 35 mutually compress, and wherein ratchet 35 is in pawl It cannot be turned round under I321 effect, therefore long axis 3 cannot turn round, sprocket wheel 31 does not also turn round, and chain 311 does not decline.

When stirring the clicking section 51 of slide switch 5 contacts the contact portion 52 of slide switch 5 and pawl II324 extruding, spine Brake tooth 331 on pawl II324 and brake seat 33 disengages, and brake seat 33 is not influenced by pawl II324 can be clockwise Rotation can rotate counterclockwise again, and Lever Blocks, which is in, closes without underloading enhanced feature state.At this point, when 312 nothing of suspension hook under cucurbit It carries or is lightly loaded, pull handle 39, the rotation of commutation ratchet 35 and pressing friction piece II36 and ratchet 35, friction plate I34, system clockwise Dynamic device seat 33, the rotation of brake seat 33 drive long axis 3 to rotate clockwise, and long axis 3 rotates clockwise passes through gear train assembly again Band movable sprocket 31 rotates increase chain 311；When rotary handle 39, commutate band under the action of locking nut 40 of ratchet 35 Dynamic long axis 3 turns round, and the revolution of long axis 3 turns round sprocket wheel 31 so that chain 311 declines by gear train assembly.Cucurbit is closed It closes without underloading enhanced feature, lower 312 no-load of suspension hook or at light load, chain 311 can not be promoted effectively.When suspension hook 312 rises under cucurbit When having hung weight, handle 39 is pulled clockwise, and commutation ratchet 35 rotates pressing friction piece II36, ratchet 35, friction plate I34 and system Dynamic device seat 33, the rotation of brake seat 33 drive long axis 3 to rotate clockwise, and long axis 3 rotates clockwise passes through gear train assembly again Band movable sprocket 31 rotates that chain 311 is made to rise lifting heavy；When rotary handle 39, because weight reaction force to brake Device seat 33 and friction plate I34, ratchet 35, friction plate II36, commutation ratchet 35 mutually compress, and wherein ratchet 35 is made in pawl I321 It cannot be turned round under, therefore long axis 3 cannot turn round, sprocket wheel 31 does not also turn round, and chain 311 does not decline.

The use principle of this programme is: stirring 5 clicking section 51 of slide switch squeezes contact portion 52 with pawl II324 Contact, when enabling without underloading enhanced feature, pawl II324 blocks the brake tooth on brake seat 33 under the action of torsional spring 323 331, in the case where lower 312 no-load of suspension hook or underloading, pull handle 39 clockwise, chain 311 rises, rotary handle 39, chain 311 do not rise and also do not decline；In the case where lower 312 hoisting heavy of suspension hook, handle 39 is pulled clockwise, and chain 311 rises, revolution Handle 39, chain 311, which does not rise, also not to be declined.Stirring 5 clicking section 51 of slide switch connects contact portion 52 and pawl II324 extruding Brake tooth 331 on touching, pawl II324 and brake seat 33 disengages, when closing without underloading enhanced feature, lower 312 no-load of suspension hook Or in the case where underloading, handle 39 is pulled clockwise, and chain 311 rises, and rotary handle 39, chain 311 declines；Lower suspension hook 312 In the case where hoisting heavy, pull handle 39 clockwise, chain 311 rises, rotary handle 39, chain 311 do not rise also not under Drop.Realize that the pawl 393 that commutates when above-mentioned function blocks commutation ratchet 35, when the pawl 393 that commutates is disengaged with commutation ratchet 35, hand Handle 39 dallies, at this time can empty zip strip 311 just may make chain 311 to rise or fall.

The beneficial effect of this programme is: it is easy to operate, it had not only been able to achieve 311 raising of no-load or light condition lower chain, but also The chain 311 in hoisting heavy and empty zip strip 311 is able to achieve to rise.

Further, there are two pawl I321 includes, the symmetric position that is separately positioned on centered on long axis 3.In wallboard The effect that two pawl I321 are arranged in the upper symmetric position centered on long axis 3 of II32 is that so that pawl I321 is blocked ratchet 35 makes It can only be one-directionally rotated, and compared to only braking of the one pawl I321 of setting to ratchet 35 in braking on wallboard II32 Power can more greatly and more evenly.

Further, handle 39 includes the inner handle 391 and outdoor handle 392 being fixedly connected, and ratchet casing 22 is fixed on wallboard On II32, ratchet casing 22 is provided with through-hole 221, and 221 edge of through-hole includes that groove I222 outstanding, inner handle 391 are set to the right It sets in groove I222, handle 39 is rotatablely connected around ratchet casing 22.Handle 39 is hand around the effect that ratchet casing 22 is rotatablely connected Handle 39 does not influence protection of the ratchet casing 22 to components between wallboard II32 and handle 39 in the case where being able to rotate.

Further, including fluted on the left of load limiter seat 37, friction plate II36 is matched with groove.When locking nut 40 When compressing brake seat 33, friction plate I34, ratchet 35, friction plate II36, load limiter seat 37, commutation ratchet 35 and handle 39, limit It carries and is arranged fluted on device seat 37, friction plate II36 matches more advantageous compared to groove is not provided on load limiter seat 37 with groove The transmitting of frictional force between load limiter seat 37 and friction plate II36.

Claims (5)

1. a kind of without underloading Lever Blocks, including hook (1), hook (1) lower section is fixed with gear cover (21) and ratchet casing (22), it is fixed with long axis (3), is set gradually from left to right on long axis (3) with teeth between gear cover (21) and ratchet casing (22) Wheel transmission system, wallboard I(30), sprocket wheel (31), wallboard II(32), brake seat (33), friction plate I(34), ratchet (35), rub Pad II(36), load limiter seat (37), commutation ratchet (35), handle (39) and locking nut (40), be wound on sprocket wheel (31) and The chain (311) to match, be fixed with lower suspension hook (312), friction plate I(34 below chain (311)), ratchet (35) and friction Piece II(36) be set on brake seat (33), wallboard II(32) on be fixed with pawl I(321), pawl I(321) block ratchet (35), commutation pawl (393) is provided with below commutation ratchet (35), commutation pawl (393) is fixed on handle (39), feature Be: wallboard II(32) on be fixed with pin shaft (322), torsional spring (323) and pawl II(324 are arranged on pin shaft (322)), braking Device seat (33) outer rim includes the brake tooth (331) for being uniformly distributed and matching with pawl II(324), and ratchet casing is arranged on (22) Have slide switch (5), slide switch (5) include setting in the outer clicking section (51) of ratchet casing (22) and setting in ratchet casing (22) Interior contact portion (52).

2. as described in claim 1 without underloading Lever Blocks, it is characterised in that: pawl I(321) include there are two, set respectively It sets in the symmetric position centered on long axis (3).

3. as claimed in claim 1 or 2 without underloading Lever Blocks, it is characterised in that: handle (39) include be fixedly connected it is interior Handle (391) and outdoor handle (392), ratchet casing (22) are fixed on wallboard II(32) on, ratchet casing (22) is provided with through-hole (221), through-hole (221) edge includes groove I(222 outstanding to the right), inner handle (391) setting in groove I(222), Handle (39) is rotatablely connected around ratchet casing (22).

4. as claimed in claim 1 or 2 without underloading Lever Blocks, it is characterised in that: include recessed on the left of load limiter seat (37) Slot, friction plate II(36) it is matched with groove.

5. as claimed in claim 3 without underloading Lever Blocks, it is characterised in that: including fluted on the left of load limiter seat (37), Friction plate II(36) it is matched with groove.