CN201236121Y

CN201236121Y - Energy-saving safe miniature electric gourd

Info

Publication number: CN201236121Y
Application number: CNU2008200418370U
Authority: CN
Inventors: 陆颖杰; 陆正岳; 郁正叶
Original assignee: CHANGSHU HAIOU MACHINERY Co Ltd
Current assignee: CHANGSHU HAIOU MACHINERY Co Ltd
Priority date: 2008-07-17
Filing date: 2008-07-17
Publication date: 2009-05-13
Anticipated expiration: 2018-07-17

Abstract

The utility model relates to an energy-saving and safe micro-electric hoist belonging to the technical field of a lifting device. The energy-saving and safe micro-electric hoist comprises a main shell, a first cover, a second cover, a roller mechanism and an electric motor, wherein the main shell has a first shell cavity; the first cover is arranged at one end of the main shell and has a second shell cavity; the second cover is arranged at the other end of the main shell and has a third shell cavity; the roller mechanism and the electric motor are parallel to each other and arranged in the first shell cavity in the horizontal position. The energy-saving and safe micro-electric hoist is characterized in that the electric motor is a permanent magnet DC motor. A braking mechanism used for actuating the roller mechanism to brake and respond to the over lifting weight of the roller mechanism is arranged in the third shell cavity. The braking mechanism is respectively transmission-connected to the roller mechanism and the electric motor. The utility model has the advantages that the electric motor adopts the permanent magnet DC motor, so as to be beneficial for the power improvement, the volume reduction and the conservation for energy and copper product resources; the braking mechanism has the advantage of stable and reliable brake; the structure of the braking mechanism is capable of realizing control to ensure the safety when a lifted object is overweight.

Description

Energy-conservation and safe minisize electric hoist

Technical field

The utility model belongs to the bont technical field, is specifically related to a kind of energy-conservation and safe minisize electric hoist.

Background technology

The notion of the top minisize electric hoist of mentioning is meant the electric block of crane capacity about 500kg, and this minisize electric hoist is widely used in industrial and mining enterprises, fondouk, supermarket, market and logistic industry and even family garage, storage room, high residential building, repairing trades or the like.In Chinese patent literature, also can be seen in various technical schemes about minisize electric hoist, the more representative minisize electric hoist disclosed (by the applicant's application) as Chinese invention patent application publication number CN101007619A, the achievement of the technical scheme of this patent application is: easy for installation, can not occur in the use toppling; It is convenient to change capstan winch and twisted rope; It is comfortable and laborsaving to lift carrying; Deviating from and can guarantee safety from suspension hook can not appear in hanging object.

But the applicant thinks that the technical scheme of above-mentioned patent application still has following drawback; One, because what motor adopted is squirrel cage motor, not only there is the shortcoming that the big and deal weight of volume and power are little, waste energy in squirrel cage motor, but also exist waste to belong to the copper raw material of strategic resource, because the rotor of squirrel cage motor and stator all will use copper material, so, be unfavorable for energy savings and valuable copper material resource; Its two, what brake equipment adopted is electromagnetic brake, the maximum unfavorable factor of electromagnetic brake shows as to be lost stablely, because the rotating speed of motor of minisize electric hoist is often higher, in case can not fully check (braking), then can cause slide under the suspended object, accidents caused; Its three, do not have overweight controllable function, have potential safety hazard.

Summary of the invention

Task of the present utility model is to provide a kind of and not only has the good energy-conservation and the effect that saves material, but also has desirable braking and prevent overweight lifting effect and use safing energy-conservation and safe minisize electric hoist.

Task of the present utility model is finished like this, a kind of energy-conservation and safe minisize electric hoist, it comprises main casing, first case with second shell chamber that is configured in main casing one end with first shell chamber, be configured in second case with the 3rd shell chamber of the main casing other end and in parallel with each other and with horizontally-arranged state be arranged on cylinder mechanism and motor in the described first shell chamber, characteristics are: described motor is a direct current permanent magnet motor; Be provided with in described the 3rd shell chamber one be used for to cylinder mechanism implement braking and to the cylinder mechanism stop mechanism that lift heavy responds that transfinites, this stop mechanism connects with described cylinder mechanism and drive of motor respectively.

In a specific embodiment of the present utility model, described stop mechanism comprises a pair of ratchet, first gear wheel shaft, pawl seat, ratchet, a pair of brake strip, screw collar, driven gear, a pair of limit for tonnage friction lining, pad, disk spring, the disk spring seat, locking plate, jam nut and adjustment piece, a pair of ratchet is located on the corresponding pawl base separately, pawl base is located on the wallboard and is stretched in the 3rd shell chamber, the two ends of first gear wheel shaft are located on the corresponding cavity wall in the 3rd shell chamber, on first gear wheel shaft, constitute the first key tooth respectively, first thread, second key tooth and the bevel pinion, bevel pinion and cylinder mechanism transmission connect, pawl seat matches with the second key tooth, ratchet and a pair of brake strip are installed on the pawl seat jointly, wherein, ratchet matches with described a pair of ratchet, and a pair of brake strip is positioned at the both sides of ratchet, screw collar matches with described thread, driven gear is located on the screw collar, and connect with described drive of motor, a pair of limit for tonnage friction lining is separately fixed at the both sides of driven gear, pad and disk spring are located on the disk spring seat, and the disk spring seat is located on the screw collar, wherein, one side of pad is pasted with the limit for tonnage friction lining that is fixed on driven gear one side and is touched, the opposite side of pad and disk spring paste and touch, locking plate and jam nut are located on the screw collar, and locking plate is adjusted piece and is matched with the described first key tooth that is formed on first gear wheel shaft between jam nut and disk spring seat.

In another specific embodiment of the present utility model, described cylinder mechanism comprises capsizing moment spindle, capstan winch, lifting rope, suspension hook, first, the secondary signal collector, the signal picker feeler lever, big gear wheel, miniature gears and large helical gear, capstan winch is located on the capsizing moment spindle, one end of capsizing moment spindle is located on the left wallboard of described main casing, the other end is located on the right wallboard of main casing and is insinuated in described the 3rd shell chamber, be provided with the triple bond tooth on the spindle nose of the capsizing moment spindle in being insinuated into the 3rd shell chamber, one end of lifting rope is fixed on the capstan winch, the other end and suspension hook connect, first, the secondary signal collector is located on the main casing and corresponding to the down either side of described capstan winch, first, the secondary signal collector is electrically connected by circuit and the master cock that is used to control described machine operation, signal picker feeler lever hinge is connected on the main casing and is positioned at the below of capstan winch, one end of acquisition of signal feeler lever is corresponding with first signal picker, the other end is corresponding with the secondary signal collector, big gear wheel is fixed on the described triple bond tooth, and be meshed with miniature gears, the two ends of second gear wheel shaft of miniature gears are located on the corresponding cavity wall in the 3rd shell chamber, large helical gear is fixed on second gear wheel shaft and with described stop mechanism transmission and connects, wherein, on a described left side, the one end position placed in the middle of right wallboard is provided with a hook axle, is provided with a hook on the hook axle.

Go back in the specific embodiment of the present utility model, the spindle nose of the power take-off shaft of described motor is provided with motor shaft full-depth tooth wheel, and this motor shaft full-depth tooth wheel connects with described stop mechanism transmission in extending into described the 3rd shell chamber.

In another specific embodiment of the present utility model, described lifting rope is steel rope or chain.

In another specific embodiment of the present utility model, described first, second signal picker is travel switch, micro-switch, near in switch or the hall sensor any one.

More of the present utility model and in specific embodiment, described first, second signal picker is a travel switch.

In of the present utility model and then specific embodiment, described pawl seat constitutes one first installation step in the central authorities towards described ratchet one side, and described ratchet is installed on described first installation step with a pair of brake strip that lays respectively at the ratchet both sides.

Of the present utility model again more and in specific embodiment, described screw collar constitutes one second installation step in the central authorities towards described driven gear one side, and on this second installation step, be provided with and connect thread, the described disk spring seat that is fixed with driven gear, the pad of a pair of limit for tonnage friction lining and disk spring is installed is located on second installation step, and described locking plate and jam nut are installed in described connecting on the thread.

In again of the present utility model and then specific embodiment, described disk spring seat constitutes one the 3rd installation step in the central authorities towards driven gear one side, and described pad and disk spring are located on the 3rd installation step.

The advantage of technical scheme provided by the utility model is: motor has been adopted direct current permanent magnet motor, thereby helped improving power, reduced volume and energy savings and copper material resource; Stop mechanism is compared with the electromagnetic braking in the prior art has the stable and failure-free strong point of braking; When suspended object is overweight, can realize control, thereby can guarantee safety by the structure of stop mechanism.

Description of drawings

Fig. 1 is a specific embodiment constructional drawing of the present utility model.

Fig. 2 is the side sectional view of Fig. 1.

Fig. 3 is the cutaway view after the stop mechanism assembling of the present utility model.

Fig. 4 is another example structure figure of the present utility model.

Fig. 5 is the cutaway view of Fig. 4.

The specific embodiment

For your inspector of making Patent Office particularly the public can be well understood to essence of the present utility model and beneficial effect more; the spy reaches embodiment in conjunction with the accompanying drawings the specific embodiment of the present utility model is described in detail as follows; but all descriptions to embodiment all do not constitute the restriction to the technical solution of the utility model, and are any pro forma but not substantial equivalence is replaced or notion changes and all should be considered as technical scheme scope disclosed in the utility model and the prescription protection.

Embodiment 1:

See also Fig. 1, the shape of main casing 49 is substantially cuboid, constitute the first shell chamber 47, in this first shell chamber 47, cylinder mechanism 51 and motor 2 are set in parallel with horizontally-arranged state ground and both, adopt direct current permanent magnet motor for motor 2, the strong point of this motor is that power is big, volume is little and saves copper material, because, with equal-wattage also be that the squirrel cage motor that widely uses in the prior art is compared, for example respectively be 600W, then the diameter of squirrel cage motor and length are respectively 185mm, 360mm, and weight is 8kg; And the diameter of direct current permanent magnet motor and length only are 90mm, 210mm respectively, and weight is 4.2kg, and energy-conservation comparing with squirrel cage motor can reach more than 1 times.Again because, from making the used material of motor, the stator of squirrel cage motor and rotor all need copper material (enamel wire), and direct current permanent magnet motor only on rotor with and copper material, stator is because the use magnet steel need not the copper resource of consume valuable.

Being example at present, also being that the left accent in the first shell chamber 47 of main casing 49 is provided with left wallboard 50 at the left end of main casing 49, and on left wallboard 50, establishing first case 1 by location status shown in Figure 1; At the right-hand member of main casing 49 also is that the right accent in the first shell chamber 47 of main casing 49 is provided with right wallboard 33, and establishes second case 24 on right wallboard 33.By one group of (having provided four among the figure) connecting screw rod 48 and by means of nut first, second case 1,24 and left and

right wallboard

50,33 are realized connecting.First case 1 has one second shell chamber 52, and second case 24 constitutes one the 3rd shell chamber 53.The afterbody of described motor 2 is arranged in the second shell chamber 52, the middle part of motor 2 is that the main body (body) of motor 2 is positioned at the first shell chamber 47, and the power take-off shaft 38 of motor 2 passes behind the right wallboard 33 and then the motor axis hole 23 that passes on the shell wall that is opened in second case 24 is stretched in the 3rd shell chamber 53, owing on the spindle nose of the power take-off shaft 38 of motor 2, be provided with motor shaft full-depth tooth wheel 37, and this motor shaft full-depth tooth is taken turns 37 integral body and is arranged in the 3rd shell chamber 53, therefore in the 3rd shell chamber 53 by motor shaft full-depth tooth wheel 37 with below stop mechanism 54 transmissions that are about to describe in detail connect.The two ends of motor 2 are fixed with one group of motor fix screw 5 and left and right wallboard 50,33.And is that carrier is provided with a hook axle 3 in the middle position, top corresponding to aforesaid main casing 49 with left and

right wallboard

50,33, hook 4 is set on hook axle 3, the self-evident effect of hook 4 be used for energy-conservation and safe minisize electric hoist of the present utility model hang or title be installed in the field of employment.

Ask for an interview Fig. 3 and continuation in conjunction with Fig. 1, the stop mechanism 54 that provides has double action, so-called double action: the one, and braking; The 2nd, lift heavy responds to transfiniting.Foreknowledge Fig. 1, a pair of ratchet 30 as stop mechanism 54 respectively is located on the corresponding pawl base 32, and pawl base 32 is arranged on the right wallboard 33, and pawl base 32 is insinuated in the 3rd shell chamber 53 of second case 24, the power of holding of compeling of each ratchet 30 is ensured by ratchet torsion spring 31, specifically be that middle part with ratchet torsion spring 31 is nested with on pawl base 32, and a torsion spring pin of ratchet torsion spring 31 is fixed on the torsion spring pin fixed leg, another torsion spring pin then hook on ratchet 30.As an end of first gear wheel shaft 22 of stop mechanism 54 is that left end shown in Figure 1 is hubbed on first gear shaft block 26 on the shell wall of second case 24, and on second gear shaft block 25 on another shell wall of the other end of first gear wheel shaft 22 to be right-hand member shown in Figure 1 be hubbed on second case 24, first, second

gear shaft block

26,25 keeps corresponding.Middle part at first gear wheel shaft 22 designed successively (being processed with) first key tooth 55, first thread 19,, the second key tooth 20 and bevel pinion 21, bevel pinion 21 is meshed with the large helical gear 27 of cylinder mechanism 51, thereby realizes that the stop mechanism 54 and the transmission of cylinder mechanism 51 connect.The central authorities that are shaped as disc shaped pawl seat 17 are processed with spline slotted eye 18, by the cooperating of the second key tooth 20 on spline slotted eye 18 and first gear wheel shaft 22 and pawl seat 17 is arranged on first gear wheel shaft 22.Extended one first installation step 58 in 17 sides of pawl seat towards ratchet 16, sheathed ratchet 16 and a pair of brake strip 15 on this first installation step 58, a pair of brake strip 15 is positioned at the both sides of ratchet 16, and each pastes mutually with ratchet 16 and touches.Be processed with negative thread in the medium pore of screw collar 14, match with first thread 19 on first gear wheel shaft 22 and screw collar 14 is arranged on first gear wheel shaft 22 by this negative thread.Extended one second installation step 59 in 14 sides of screw collar towards driven gear 12, on second installation step 59, extended and connected thread 60, a pair of limit for tonnage friction lining 13 is respectively fixed to two rear flank of driven gear 12, driven gear 12 is nested with on second installation step 59, and driven gear 12 is meshed with aforesaid motor shaft full-depth tooth wheel 37.Disk spring seat 9 is set on

second installation step

59,9 central authorities towards a side of driven gear 12 have extended one the 3rd installation step 61 at the disk spring seat, pad 11 and disk spring 10 are set on the 3rd installation step 61, and, one side of pad 11 is that the limit for tonnage friction lining 13 in left side shown in Figure 1 contacts (Fig. 3 shows) with being fixed on driven gear 12 1 sides, and the opposite side of pad 11 and disk spring 10 paste and touch.Locking plate 8 and jam nut 7 are located on first thread 19 of first gear wheel shaft 22, wherein, the negative thread on the jam nut 7 and first thread revolve joins, and act on locking plate 8 by jam nut 7, and then produce the effect clamped down on or claim the power of clamping down on by the disk spring seat 9 that 8 pairs of locking plates are equipped with pad 11 and disk spring 10.Clearly, the size of clamping down on power realizes by suitable or conter clockwise adjusting lock nut 7, more particularly, by adjusting lock nut 7, just can change the deformation degree of disk spring 9.Adjusting piece 6 fixes by the first key tooth 55 on its central keyway and first gear wheel shaft 22.

Ask for an interview Fig. 2 and still in conjunction with Fig. 1, the applicant clearly show that the assembled relation of each parts of cylinder mechanism 51 of the present utility model in Fig. 1, here the applicant need to prove: cylinder mechanism 51 can be called winch mechanism fully or claim twisted rope mechanism.As an end of the capsizing moment spindle 42 of the capstan winch 43 of cylinder mechanism 51 is that the left end hub setting of location status shown in Figure 1 is on left wallboard 50; And the other end of capsizing moment spindle 42 be the right-hand member hub setting of location status shown in Figure 1 on right wallboard 33, and on right wallboard 33, be equipped with connecting panel 36, also constitute triple bond tooth 56, the triple bond teeth 56 at this end of capsizing moment spindle 42 and be stretched in the 3rd shell chamber 53.Big gear wheel 35 is fixed on the triple bond tooth 56 and with jump ring 34 blocks, by shown in Figure 2, big gear wheel 35 is meshed with miniature gears 29, and second gear wheel shaft, 28 hub settings of miniature gears 29 are on the corresponding shell wall of second case 24.Large helical gear 27 usefulness flat key fixed forms are fixed on second gear wheel shaft 28, are meshing with each other with bevel pinion 21 on first gear wheel shaft 22 of stop mechanism 51.One end of lifting rope 45 is fixed on the capstan winch 43, and the middle part is wrapped on the disk body of capstan winch 43, and the other end and suspension hook 57 connect.In the present embodiment, the applicant selects steel rope as lifting rope 45.First,

second signal picker

44,46 is located at the bottom of main casing 49, and substantially corresponding to the down either side of capstan winch 43, by circuit be used to control the master cock of motor 2 work or claim that controller is electrically connected.First,

second signal picker

44,46 both can adopt travel switch, also can adopt micro-switch, also can adopt other switch as near switch or hall sensor or the like, and in the present embodiment, the applicant selects travel switch.Hinge is attached at the bottom of main casing 49 to signal picker feeler lever 41 by feeler lever anchor shaft 62, and is provided with a pair of limit shaft 40 that is used to stop hanging object on main casing 49 and corresponding to the bottom of capstan winch 43.When the object of being hung oneself by suspension hook 57 when signal picker feeler lever 41 touches, show that then hanging object arrives the height that vertex promptly reaches the limit of the position, the haptic element 39 of signal picker feeler lever 41 is thrown off with secondary signal collector 46, give master cock by secondary signal collector 46 with signal feedback, motor 2 quits work, otherwise, when the lifting rope on the capstan winch 43 45 is withdrawn into the limit, then touch first signal picker 44 by tubercle on the lifting rope 45 or projection, give master cock by first signal picker 44 with signal feedback, motor 2 quits work.

Whole drive connection is the driven gear 12 that is driven stop mechanism 54 by the wheel of the motor shaft full-depth tooth on the power take-off shaft 38 of motor 2 37, drive first gear wheel shaft 22 by driven gear 12, drive large helical gear 27 by the bevel pinion on first gear wheel shaft 22 21, because large helical gear 27 and miniature gears 29 coaxial promptly being in together on second gear wheel shaft 28, therefore drive miniature gears 29 by large helical gear 27, and then, drive capsizing moment spindles 42 by big gear wheel 35 by miniature gears 29 drive big gear wheels 35.The sense of motion that big gear wheel 35, miniature gears 29, large helical gear 27 and first gear wheel shaft 22 are also arranged by arrow signal in Fig. 2, and signal has the situation that cooperates of a pair of ratchet 30 and ratchet 16.

Embodiment 2:

Ask for an interview Fig. 4 and Fig. 5, as another kind of embodiment, the steel rope that lifting rope among the embodiment 1 45 is adopted becomes the employing chain, and to the pro forma slightly change of the structure that is located at the capstan winch 43 on the capsizing moment spindle 42, that is exactly, on the card of capstan winch 43, process the chain 63 that the shape with chain matches, capstan winch 43 is fixed by the spline 64 and the middle part of capsizing moment spindle 42, one end of capsizing moment spindle 42 is Fig. 4, left end shown in Figure 5 passes the first spindle nose hole, the 71 usefulness bearing hub settings of left supporting base 66 on left wallboard 50 shown in Figure 1, and the other end of capsizing moment spindle 42 is Fig. 4, right-hand member shown in Figure 5 passes the second spindle nose hole, the 72 usefulness bearing hub settings of right supporting base 65 on right wallboard 33 shown in Figure 1, and with the same way as of embodiment 1 that big gear wheel 35 and triple bond tooth 56 is fixing.When connecting firmly left and right supporting

base

66,65 together with screw 67, whole capstan winch 43 just is in by in 66,65 cavitys that constitute jointly of left and right supporting base, because left and right supporting

base

66,65 respectively has cavity volume 68.The chain that is used as lifting rope 45 is corresponding in the lifting rope groove 69 that is made of jointly left and right supporting

base

66,65, and lifting rope groove 69 is made of baffle plate 70 isolation that are fixed on the left and right supporting base 66,65.In addition, owing to adopted chain as lifting rope 45, and adopted left and right supporting

base

66,65, therefore corresponding change has been done in the installation site of first,

second signal picker

44,46, promptly, first,

second signal picker

44,46 is installed in the bottom of right supporting base 65, but equally also can be installed in the bottom of left supporting base 66.The weight (hanging object) of being guided and supported when the suspension hook 57 (illustrating not shown) of chain one client link sends signal when touching first haptic element 73 of secondary signal collector 46 and gives master cock, motor 2 quits work, send signal and give master cock when the projection (not shown) on the chain other end is touched second haptic element 74 of first signal picker 44, motor 2 quits work.

Explanation by present embodiment shows fairly obviously, and the technical scheme that the utility model is recommended can also satisfy freely selecting of user, so-called freely select to be meant by the user in steel rope or chain, select arbitrarily.If select the former (steel rope), it is described and by category illustrated in figures 1 and 2 then to belong to embodiment 1; If select latter's (chain), so as long as structure shown in Figure 4 is changed in the first shell chamber 47 shown in Figure 1.In addition, also have a kind of situation that gets both, that is exactly that the user is after the structure that has embodiment 1, be equipped with the structure of embodiment 2 as the reply use occasion, so, do not need to purchase simultaneously steel wire rope type and minisize electric hoist chain-type, help saving acquisition expenses.All the other are with the description to embodiment 1.

Application examples:

Structure with embodiment 1 is an example, braking principle: when weight rise winch to desired height promptly lift by crane finish after, motor 2 quits work, this moment is because the effect of gravitational moment, make capstan winch 43 drive capsizing moment spindle 42, big gear wheel 35, miniature gears 29, large helical gear 27, bevel pinion 21, reversal trend appears in parts moment that first gear wheel shaft 22 and all are located on first gear wheel shaft 22, but because first gear wheel shaft 22 is processed with first thread 19, during counter-rotating, first gear wheel shaft 22 and screw collar 14 are with ratchet 16, brake strip 15 compresses, when friction moment during greater than gravitational moment, owing to the effect of 30 pairs of ratchets 16 of ratchet makes the weight stop motion, promptly realized braking.

The lift heavy response theory transfinites: because first thread 19 on first gear wheel shaft 22 matches with screw collar 14, and the both sides at flower wheel 12 respectively are fixed with a pair of limit for tonnage friction lining 13 that (armouring) plays the limit for tonnage effect, the outside is equipped with pad 11, disk spring 10, disk spring seat 9 and jam nut 7, adjust jam nut 7 with suitable moment, compress disk spring 10, the a pair of limit for tonnage friction lining 13 of pad 11 and driven gear 12 both sides, when friction moment during greater than schedule weight moment, driven gear 12 is as a whole with all component set-ups that all are located on first gear wheel shaft 22, can embody the safety lifting to weight.Yet, when weight weight surpasses regulation, because of gravitational moment greater than friction moment, thereby driven gear 12 is skidded on second installation step 59 of screw collar 14, first gear wheel shaft 22 remains static, and can't implement lifting.

Claims

1, a kind of energy-conservation and safe minisize electric hoist, it comprises main casing (49), first case (1) with second shell chamber (52) that is configured in main casing (49) one ends with first shell chamber (47), be configured in second case (24) with the 3rd shell chamber (53) of the main casing other end and in parallel with each other and with horizontally-arranged state be arranged on cylinder mechanism (51) and motor (2) in the described first shell chamber (47), it is characterized in that: described motor (2) is a direct current permanent magnet motor; Be provided with in described the 3rd shell chamber (53) one be used for to cylinder mechanism (51) implement braking and to cylinder mechanism (51) stop mechanism (54) that lift heavy responds that transfinites, this stop mechanism (54) respectively with described cylinder mechanism (51) and motor (2) transmission connection.

2, energy-conservation and safe minisize electric hoist according to claim 1, it is characterized in that described stop mechanism (54) comprises a pair of ratchet (30), first gear wheel shaft (22), pawl seat (17), ratchet (16), a pair of brake strip (15), screw collar (14), driven gear (12), a pair of limit for tonnage friction lining (13), pad (11), disk spring (10), disk spring seat (9), locking plate (8), jam nut (7) and adjustment piece (6), a pair of ratchet (30) is located on the corresponding pawl base (32) separately, pawl base (32) is located at wallboard (33) and goes up and be stretched in the 3rd shell chamber (53), the two ends of first gear wheel shaft (22) are located on the corresponding cavity wall in the 3rd shell chamber (53), on first gear wheel shaft (22), constitute the first key tooth (55) respectively, first thread (19), the second key tooth (20) and bevel pinion (21), bevel pinion (21) connects with cylinder mechanism (51) transmission, pawl seat (17) matches with the second key tooth (20), ratchet (16) and a pair of brake strip (15) are installed on the pawl seat (17) jointly, wherein, ratchet (16) matches with described a pair of ratchet (30), and a pair of brake strip (15) is positioned at the both sides of ratchet (16), screw collar (14) matches with described thread (19), driven gear (12) is located on the screw collar (14), and connect with described motor (2) transmission, a pair of limit for tonnage friction lining (13) is separately fixed at the both sides of driven gear (14), pad (11) and disk spring (10) are located on the disk spring seat (9), and disk spring seat (9) is located on the screw collar (14), wherein, one side of pad (11) is pasted with the limit for tonnage friction lining (13) that is fixed on driven gear (12) one sides and is touched, the opposite side of pad (11) and disk spring (10) paste and touch, locking plate (8) and jam nut (7) are located on the screw collar (14), and locking plate (8) is positioned between jam nut (7) and the disk spring seat (9), adjusts piece (6) and matches with the described first key tooth (55) that is formed on first gear wheel shaft (22).

3, energy-conservation and safe minisize electric hoist according to claim 1, it is characterized in that described cylinder mechanism (51) comprises capsizing moment spindle (42), capstan winch (43), lifting rope (45), suspension hook (57), first, secondary signal collector (44,46), signal picker feeler lever (41), big gear wheel (35), miniature gears (29) and large helical gear (27), capstan winch (43) is located on the capsizing moment spindle (42), one end of capsizing moment spindle (42) is located on the left wallboard (50) of described main casing (49), the other end is located at the right wallboard (33) of main casing (49) and goes up and be insinuated in described the 3rd shell chamber (53), be provided with triple bond tooth (56) on the spindle nose of the capsizing moment spindle (42) in being insinuated into the 3rd shell chamber (53), one end of lifting rope (45) is fixed on the capstan winch (43), the other end and suspension hook (57) connect, first, secondary signal collector (44,46) be located at that main casing (49) is gone up and corresponding to the down either side of described capstan winch (43), first, secondary signal collector (44,46) be electrically connected by circuit and the master cock that is used to control described motor (2) work, signal picker feeler lever (41) hinge is connected the below that capstan winch (43) were gone up and be positioned to main casing (49), one end of acquisition of signal feeler lever (41) is corresponding with first signal picker (44), the other end is corresponding with secondary signal collector (46), big gear wheel (35) is fixed on the described triple bond tooth (56), and be meshed with miniature gears (29), the two ends of second gear wheel shaft (28) of miniature gears (29) are located on the corresponding cavity wall in the 3rd shell chamber (53), large helical gear (27) is fixed on second gear wheel shaft (28) and upward and with described stop mechanism (54) transmission connects, wherein, on a described left side, right wallboard (50,33) end position placed in the middle is provided with a hook axle (3), is provided with a hook (4) on hook axle (3).

4, energy-conservation and safe minisize electric hoist according to claim 1, the spindle nose that it is characterized in that the power take-off shaft (38) of described motor (2) is provided with motor shaft full-depth tooth wheel (37), and this motor shaft full-depth tooth wheel (37) connects with described stop mechanism (54) transmission in extending into described the 3rd shell chamber (53).

5, energy-conservation and safe minisize electric hoist according to claim 3 is characterized in that described lifting rope (45) is steel rope or chain.

6, energy-conservation and safe minisize electric hoist according to claim 3 is characterized in that described first, second signal picker (44,46) is for travel switch, micro-switch, near in switch or the hall sensor any one.

7, energy-conservation and safe minisize electric hoist according to claim 6 is characterized in that described first, second signal picker (44,46) is a travel switch.

8, energy-conservation and safe minisize electric hoist according to claim 2, it is characterized in that described pawl seat (17) constitutes one first installation step (58) in the central authorities towards described ratchet (16) one sides, described ratchet (16) and a pair of brake strip (15) that lays respectively at ratchet (16) both sides are installed on described first installation step (58).

9, energy-conservation and safe minisize electric hoist according to claim 2, it is characterized in that described screw collar (14) constitutes one second installation step (59) in the central authorities towards described driven gear (12) one sides, and on this second installation step (59), be provided with and connect thread (60), the described driven gear (12) that is fixed with a pair of limit for tonnage friction lining (13), pad (11) and the disk spring seat (9) that disk spring (10) is installed are located on second installation step (59), and described locking plate (8) and jam nut (7) are installed in described connecting on the thread (60).

10, energy-conservation and safe minisize electric hoist according to claim 2, it is characterized in that described disk spring seat (9) constitutes one the 3rd installation step (61) in the central authorities towards driven gear (12) one sides, described pad (11) and disk spring (10) are located on the 3rd installation step (61).