CN214087475U - Hand pulling block - Google Patents

Abstract

The utility model discloses a chain block, which comprises a driving system, a protection system, a bearing system and a speed reduction system; the driving system consists of a hand chain and a hand chain wheel, the hand chain wheel is connected to the long shaft of the chain block in a threaded manner, and the hand chain is matched with the hand chain wheel; the hand-pulling chain comprises chain rings and a rotary connecting piece, wherein the chain rings are connected sequentially through the rotary connecting piece, and adjacent chain rings are in rotary fit on the plane where the hand-pulling wheel is located through the chain rings; the friction surface of the hand chain wheel is provided with anti-skid grains, the other surface of the hand chain wheel opposite to the anti-skid grains is provided with an elastic pushing piece, and the elastic pushing piece elastically pushes the hand chain wheel in the axial direction. The utility model provides a pair of chain block, convenient to use, it is stable, reliable, application scope is wide.

Description

Hand pulling block

Technical Field

The utility model belongs to the technical field of chain block, especially, relate to a chain block.

Background

The existing chain block has the following defects:

firstly, the hand-pulling chain is easy to have the phenomena of bracket, winding and the like;

secondly, the noise is very large, and the influence is generated on workers;

and thirdly, the friction loss degree is large, and the service life is influenced.

In order to solve the problem, the utility model designs a chain block still has convenient to use simultaneously, and is stable, reliable, application scope wide advantage.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects existing in the prior art, the utility model provides a chain block, which is convenient to use, stable and reliable and has wide application range.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a chain block, which comprises a driving system, a protection system, a carrying system and a speed reduction system; the driving system consists of a hand chain and a hand chain wheel, the hand chain wheel is in threaded connection with a long shaft of the chain block, and the hand chain is matched with the hand chain wheel; the hand-pulling chain comprises chain rings and rotary connecting pieces, a plurality of chain rings are connected through the rotary connecting pieces in sequence, and adjacent chain rings are matched with each other in a rotating manner through the chain rings on the plane where the hand-pulling wheel is located; the friction surface of the hand chain wheel is provided with anti-skid grains, the other surface of the hand chain wheel opposite to the anti-skid grains is provided with an elastic pushing piece, and the elastic pushing piece elastically pushes the hand chain wheel in the axial direction.

Furthermore, the rotating connecting piece comprises a rotating piece and two connecting blocks connected to the rotating piece, and the two connecting blocks are correspondingly connected with the two chain rings on two sides of the rotating connecting piece respectively.

Furthermore, the elastic pushing piece comprises an inner ring plate and an outer ring plate which are elastically connected through a spring, the inner ring plate is fastened on the hand chain wheel through a hexagon socket head cap screw, and a plurality of small steel balls which are uniformly distributed are embedded in the outer plate surface of the outer ring plate;

at least one telescopic rod is connected between the inner ring plate and the outer ring plate, and the telescopic rod is formed by sequentially sliding and sleeving a plurality of sections of casing pipes.

Furthermore, the protection system comprises a ratchet wheel cover and a hand chain cover, wherein a ratchet wheel of the hand chain block is covered by the ratchet wheel cover and fixed on a left wall plate of the hand chain block, a hand chain wheel of the hand chain block is covered by the hand chain cover and the ratchet wheel cover is fixed on the left wall plate of the hand chain block, notches are formed in two sides of the hand chain cover, and a hand chain matched with the hand chain wheel penetrates out of the notches;

the protection system further comprises a flexible adjusting pad, wherein the flexible adjusting pad is arranged at the inner top of the bracelet housing and used for isolating the hand-pulled chain on the bracelet wheel from the inner top of the bracelet housing.

Further, the flexible adjusting pad comprises a support, a push-pull adjusting mechanism and a flexible pad; the bracket is arranged at the inner top of the bracelet cover; the push-pull adjusting mechanisms are arranged side by side along the length direction of the support in a posture facing the hand chain wheel; the flexible pad is connected to the push-pull end of each push-pull adjusting mechanism along the length direction of the support; the support, the push-pull adjusting mechanism, the flexible pad and the hand chain wheel are coplanar, and the flexible pad is pushed by the push-pull adjusting mechanism to bend towards the hand chain wheel in an arc shape and extend into the hand chain wheel.

Furthermore, the bearing system comprises a left wall plate, a right wall plate, a support rod, an upper lifting hook assembly, an upper hook shaft, a lifting chain wheel, a shaft sleeve, a lifting chain, a flat bolt, a lower lifting hook assembly and a lifting pin; the left wall plate is connected with the right wall plate through a support rod; the upper lifting hook assembly is connected to the upper top position between the left wall plate and the right wall plate through an upper hook shaft; the hoisting chain wheel is arranged on the long shaft of the chain block and matched with the left wall plate and the right wall plate through shaft sleeves; the hoisting chain is arranged on the hoisting chain wheel in a matched manner, one end of the hoisting chain is connected to the lower bottom position between the left wall plate and the right wall plate through a flat bolt, and the other end of the hoisting chain is connected with the lower hoisting hook component through a hoisting pin which is inserted;

the bearing system also comprises a limiting and guiding component for limiting and guiding the hoisting chain and a chain blocking component for isolating the hoisting chain; the two limiting guide parts are centrally and symmetrically distributed about the hoisting chain wheel; the chain blocking part is one and is positioned right below the hoisting chain wheel.

Furthermore, the limiting guide component comprises a central shaft, an elastic fixing ring and a contact cylinder; the central shaft is rotatably connected between the left wall plate and the right wall plate; the number of the elastic fixing rings is at least two, and the elastic fixing rings are respectively sleeved and fixed on the central shaft; the contact cylinder is a plurality of, the mounting groove with contact cylinder one-to-one is seted up to the solid fixed ring periphery array of elasticity, in the notch embedding mounting groove of contact cylinder extrusion mounting groove, and the contact cylinder is parallel with the center pin.

Further, the chain blocking component comprises a mounting plate and a partition plate, the mounting plate is inserted between the left wall plate and the right wall plate, the partition plate is fixed on the upper surface of the mounting plate, an upward extending part of the partition plate extends into the hoisting chain wheel, and rolling balls capable of rolling freely are embedded in the two side plate surfaces of the partition plate, which are close to the hoisting chain.

Further, the speed reduction system comprises a right wall plate, a long shaft, a spline gear, a sheet gear, a short shaft, a steel sleeve, an external wall plate and a gear cover; the long shaft penetrates through the right wallboard, a hoisting chain wheel of a chain block is arranged on the long shaft, and the hoisting chain wheel is matched with the right wallboard through a matched shaft sleeve; the spline gear is arranged on the hoisting chain wheel, the short shaft is connected between the right wall plate and the outer wall plate through a steel sleeve, the sheet gear is arranged on the short shaft, the end teeth of the long shaft are meshed with the sheet gear, and the shaft body teeth of the short shaft are meshed with the spline gear; the gear cover cage outer wall plate is fixed on the right wall plate;

the upper end part and the lower end part of the external wall panel are respectively provided with a connecting piece, the external wall panel is covered with the spline gear and the plate gear and is arranged on the right wall panel through the connecting pieces, and the whole external wall panel is transparent; the part of the gear cover opposite to the external wall panel is a transparent plate, and the transparent plate is connected and installed with the gear cover through a matched rotating and connecting piece.

Further, the connecting piece comprises a connecting plate, a damping rotating shaft and a stop lever;

the connecting plate is connected to the end part of the external wall panel, the length of the connecting plate is smaller than that of the end part of the external wall panel, a through mounting hole is correspondingly formed in the right wall panel, and the connecting plate is inserted into the through mounting hole;

the damping rotating shaft is embedded into the connecting plate, the stop lever is perpendicular to the damping rotating shaft, and the stop lever is in rotating fit with the connecting plate through the damping rotating shaft; under pin and connecting plate parallel state, the connecting plate inserts and runs through in the installing port and makes the pin pass and run through installing port to right wallboard offside, and rotatory pin friction right wallboard has the contained angle to having with the connecting plate.

Has the advantages that: the utility model discloses a chain block, beneficial effect is as follows:

1) the external wall panel and the gear cover are convenient and quick to assemble, and the external wall panel and the gear cover are separated, so that raw materials are saved;

2) the lifting trolley is convenient to carry, is suitable for lifting goods in factories, mines, building industries and the like, and can be matched with various single-rail trolleys for use to form a manual conveying trolley.

Drawings

FIG. 1 is a schematic view of the whole structure of a chain block;

FIG. 2 is a schematic structural diagram of a drive system;

FIG. 3 is a schematic view of a partially enlarged structure of a hand chain;

FIG. 4 is a schematic view of the hand sprocket;

FIG. 5 is an enlarged schematic view of the ejector;

FIG. 6 is an exploded view of the shield system;

FIG. 7 is a schematic structural view of a bracelet housing and a flexible adjustment pad;

FIG. 8 is a schematic structural view of a carrier system;

FIG. 9 is a schematic structural view of a position limiting guide member;

FIG. 10 is a schematic structural view of the chain stop member;

FIG. 11 is an exploded view of the retarding system;

fig. 12 is a schematic view of a part of the structure of the deceleration system.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, a chain block comprises a driving system, a protection system, a carrying system and a speed reduction system. As shown in fig. 2 to 5, the driving system is composed of a chain block and a hand chain wheel, the hand chain wheel is connected to the long shaft of the chain block in a threaded manner, and the chain block is matched with the hand chain wheel; hand power chain includes chain ring and rotating connector, and is a plurality of the chain ring loops through rotating connector and connects, and passes through the chain ring between the adjacent chain ring and at the plane rotation cooperation at hand chain wheel place to can avoid chain ring 1.11 sideslip, only allow its plane rotation at hand chain wheel 1.2 place, avoid taking off the groove, it is more specific, rotating connector includes a rotating member and connects two connecting blocks on the rotating member, two the connecting block corresponds with two chain rings that are in the rotating connector both sides respectively and is connected, and connecting block 1.122 adopts the welding mode with chain ring 1.11 and is connected, and wherein, rotating member 1.121 has two kinds of embodiments, as follows:

the first embodiment is as follows: the rotating member 1.121 is a rotating shaft.

Example two: the rotating member 1.121 is a hinge.

The friction surface of hand sprocket has anti-skidding line, improves contact friction, avoids taking place the phenomenon of skidding between hand sprocket 1.2 and chain block's the friction disc, and is more specific, and anti-skidding line 1.21 comprises a plurality of bar archs 1.211 on hand sprocket 1.2's the friction surface evenly distributed, and bar arch 1.211 forms with hand sprocket 1.2 integrated into one piece casting.

The other side of the hand chain wheel opposite to the anti-skid grains is provided with an elastic pushing piece, the hand chain wheel is elastically pushed in the axial direction of the elastic pushing piece, when a heavy object is lifted, the hand chain wheel 1.2 is guaranteed to be better contacted with a friction plate of the chain block through the axial pushing of the elastic pushing piece 1.22, and the phenomenon of idling is avoided.

More specifically, the elastic pushing piece comprises an inner ring plate and an outer ring plate which are elastically connected through a spring, the inner ring plate is fastened on the hand chain wheel through an inner hexagonal screw, a plurality of small steel balls which are uniformly distributed are embedded in the outer plate surface of the outer ring plate, the friction force between the small steel balls and the nut at the end part of the long shaft is reduced, the friction damage is avoided, and the service life is prolonged.

It is worth noting that at least one telescopic rod is connected between the inner ring plate and the outer ring plate and used for conducting circumferential deflection limiting on the inner ring plate 1.222 and the outer ring plate 1.223, and more specifically, the telescopic rod is formed by sequentially sliding and sleeving a plurality of sections of sleeves.

As shown in fig. 6 and 7, the protection system comprises a ratchet wheel cover and a hand chain cover, wherein a ratchet wheel of the chain block is covered by the ratchet wheel cover and fixed on a left wall plate of the chain block, a hand chain wheel of the chain block is covered by the hand chain cover and the ratchet wheel cover is fixed on the left wall plate of the chain block, notches are formed in two sides of the hand chain cover, and a hand chain matched with the hand chain wheel penetrates out of the notches; the ratchet wheel housing 2.1 is provided with a first mounting hole 21, the bracelet housing 2.2 is provided with a second mounting hole 22, and the first mounting hole 21 and the second mounting hole 22 are coaxially arranged.

The protection system further comprises a flexible adjusting pad, the flexible adjusting pad is arranged at the inner top of the bracelet housing and used for isolating the hand-pulling chain on the hand chain wheel from the inner top of the bracelet housing, and the hand-pulling chain is contacted with the flexible adjusting pad in the process of lifting or descending heavy objects, so that on one hand, the noise is reduced, on the other hand, the collision damage probability is reduced, the noise reduction effect is good, and the protection performance is excellent.

The flexible adjusting pad comprises a bracket, a push-pull adjusting mechanism and a flexible pad; the bracket is arranged at the inner top of the bracelet cover; the push-pull adjusting mechanisms are arranged side by side along the length direction of the support in a posture facing the hand chain wheel; the flexible pad is connected to the push-pull end of each push-pull adjusting mechanism along the length direction of the support; the support, the push-pull adjusting mechanism, the flexible pad and the hand chain wheel are coplanar, and the flexible pad is pushed by the push-pull adjusting mechanism to bend towards the hand chain wheel in an arc shape and extend into the hand chain wheel. In flexible adjusting pad 2.3, what play to have the noise reduction guard action of isolation is flexible pad 2.33, the purpose that sets up push-and-pull adjustment mechanism 2.32 is on the one hand with flexible pad 2.33 push into hand sprocket 1.2 in, then change the shape of flexible pad 2.33 and be arc, better be close to and cover hand chain, on the other hand pulls out flexible pad 2.33 from hand sprocket 1.2 in, the installation and later stage of hand sprocket 1.2 of being convenient for dismantle maintenance, dismantle change etc..

In the present invention, preferably, the push-pull adjusting mechanism 2.32 is a small electric push rod.

The utility model discloses a flexible pad 2.33 has the embodiment of two kinds of structures, specifically as follows:

the first embodiment is as follows: the flexible cushion 2.33 is an air bag, and is formed by filling air into a flexible rubber capsule, and has the advantages of being softer and better in noise reduction and protection performance.

Example two: the flexible pad 2.33 is a flexible rubber pad, and has the advantages of simple structure and low cost.

As shown in fig. 8, fig. 9 and fig. 10, the bearing system comprises a left wall plate, a right wall plate, a support rod, an upper hook component, an upper hook shaft, a hoisting chain wheel, a shaft sleeve, a hoisting chain, a flat bolt, a lower hook component and a hoisting pin; the left wall plate is connected with the right wall plate through a support rod; the upper lifting hook assembly is connected to the upper top position between the left wall plate and the right wall plate through an upper hook shaft; the hoisting chain wheel is arranged on the long shaft of the chain block and matched with the left wall plate and the right wall plate through shaft sleeves; the hoisting chain is arranged on the hoisting chain wheel in a matched mode, one end of the hoisting chain is connected to the lower bottom position between the left wall plate and the right wall plate through a flat bolt, and the other end of the hoisting chain is connected with the lower lifting hook component through a lifting pin which is inserted and connected.

Notably, the bearing system further comprises a limit guide component for limit guiding the hoisting chain and a chain blocking component for isolating the hoisting chain; the two limiting guide parts are centrally and symmetrically distributed about the hoisting chain wheel; the chain blocking part is one and is positioned right below the hoisting chain wheel. Through spacing direction and isolation to hoisting chain 3.7, can prevent that hoisting chain 3.7 from taking place the skew to walk to the position and intertwine at the removal in-process, guarantee the stability and the reliability that chain block used.

The limiting guide component comprises a central shaft, an elastic fixing ring and a contact cylinder; the central shaft is rotatably connected between the left wall plate and the right wall plate; the number of the elastic fixing rings is at least two, and the elastic fixing rings are respectively sleeved and fixed on the central shaft; the contact cylinder is a plurality of, the mounting groove with contact cylinder one-to-one is seted up to the solid fixed ring periphery array of elasticity, in the notch embedding mounting groove of contact cylinder extrusion mounting groove, and the contact cylinder is parallel with the center pin. In the moving process of the hoisting chain 3.7, the hoisting chain 3.7 is in contact with the contact cylinder 31.3, so that the whole limiting guide part 31 is driven to rotate.

More specifically, the elastic fixing ring 31.2 is made of a metal elastic sheet through machining.

More specifically, the contact cylinder 31.3 is formed by wrapping a rubber pad 31.32 outside the steel rod 31.31, and in the moving process of the hoisting chain 3.7, the hoisting chain 3.7 is directly contacted with the rubber pad 31.32 of the contact cylinder 31.3, so that compared with the technical scheme of the existing sheave guide, the sheave guide has a flexible protection function on one hand and a noise reduction function on the other hand.

The chain blocking component comprises a mounting plate and a partition plate, the mounting plate is inserted between a left wall plate and a right wall plate, the partition plate is fixed on the upper surface of the mounting plate, an upward extending part of the partition plate extends into the hoisting chain wheel, rolling balls capable of rolling freely are embedded on two side plate surfaces of the partition plate close to the hoisting chain, the hoisting chain is 3.7 in the moving process, the hoisting chain is 3.7 in contact with the rolling balls 32.20, rolling friction is achieved, sliding friction in the prior art is compared, the generated friction force is smaller, abrasion to the structure is weaker, and therefore the service cycle is prolonged.

More specifically, mounting panel 32.1 and division board 32.2 integrated into one piece, and be connected with strengthening rib 32.3 between mounting panel 32.1 and the division board 32.2, improve structural strength, increase of service life.

Referring to fig. 11 and 12, the speed reducing system comprises a right wall plate, a long shaft, a spline gear, a plate gear, a short shaft, a steel sleeve, an outer wall plate and a gear cover; the long shaft penetrates through the right wallboard, a hoisting chain wheel of a chain block is arranged on the long shaft, and the hoisting chain wheel is matched with the right wallboard through a matched shaft sleeve; the spline gear is arranged on the hoisting chain wheel, the short shaft is connected between the right wall plate and the outer wall plate through a steel sleeve, the sheet gear is arranged on the short shaft, the end teeth of the long shaft are meshed with the sheet gear, and the shaft body teeth of the short shaft are meshed with the spline gear; the gear cover cage outer wall panel is fixed on the right wall panel.

The upper end part and the lower end part of the external wall panel are respectively provided with a connecting piece, the external wall panel is covered with the spline gear and the plate gear and is arranged on the right wall panel through the connecting pieces, and the whole external wall panel is transparent; the part of the gear cover opposite to the external wall panel is a transparent plate, and the transparent plate is connected and installed with the gear cover through a matched rotating and connecting piece. Through transparent side fascia 4.5 and transparent plate 4.6, can clearly observe spline gear 4.2 and the tooth degree of wear of piece gear 4.3, be convenient for in time change or maintain, and the dismouting is very convenient.

More specifically, the connecting piece comprises a connecting plate, a damping rotating shaft and a stop lever; the connecting plate is connected to the end part of the external wall panel, the length of the connecting plate is smaller than that of the end part of the external wall panel, a through mounting hole is correspondingly formed in the right wall panel, and the connecting plate is inserted into the through mounting hole; the damping rotating shaft is embedded into the connecting plate, the stop lever is perpendicular to the damping rotating shaft, and the stop lever is in rotating fit with the connecting plate through the damping rotating shaft; under pin and connecting plate parallel state, the connecting plate inserts and runs through in the installing port and makes the pin pass and run through installing port to right wallboard offside, and rotatory pin friction right wallboard has the contained angle to having with the connecting plate. The connecting piece 4.50 has simple structure and is very convenient to install and use.

It should be noted that the projection of the stopper 4.503 on the connecting plate 4.501 falls within the contour of the connecting plate 4.501, ensuring that the stopper 4.503 can pass through the through-hole 3.20 in the parallel state of the connecting plate 4.501.

Preferably, the connecting plate 4.501 and the stop lever 4.503 are made of low-carbon alloy steel, so that the connecting plate 4.501 and the stop lever 4.503 are wear-resistant and high in toughness, and the service life of the connecting plate is prolonged.

Preferably, the external wall panel 4.5 and the transparent panel 4.6 are both double-layer toughened laminated glass, and the structural strength is high.

Preferably, the screw 4.60 is a screw.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (10)

1. A chain block is characterized in that: comprises a driving system (1), a protection system (2), a bearing system (3) and a speed reduction system (4); the driving system (1) consists of a hand chain wheel (1.2) and a hand chain (1.1), the hand chain wheel (1.2) is in threaded connection with a long shaft of a chain block, and the hand chain (1.1) is matched with the hand chain wheel (1.2); the hand-pulling chain (1.1) comprises chain rings (1.11) and rotary connectors (1.12), wherein a plurality of chain rings (1.11) are connected sequentially through the rotary connectors (1.12), and adjacent chain rings (1.11) are in rotary fit on the plane where the hand chain wheel (1.2) is located through the chain rings (1.11); the friction surface of hand sprocket (1.2) has anti-skidding line (1.21), and is relative with anti-skidding line (1.21) the another side of hand sprocket (1.2) has ejection piece (1.22), ejection piece (1.22) axial elasticity top pushes away hand sprocket (1.2).

2. The chain block of claim 1, wherein: the rotary connecting piece (1.12) comprises a rotary piece (1.121) and two connecting blocks (1.122) connected to the rotary piece (1.121), and the two connecting blocks (1.122) are correspondingly connected with two chain rings (1.11) on two sides of the rotary connecting piece (1.12) respectively.

3. The chain block of claim 1, wherein: the elastic pushing piece (1.22) comprises an inner ring plate (1.222) and an outer ring plate (1.223) which are elastically connected through a spring (1.221), the inner ring plate (1.222) is fastened on the hand chain wheel (1.2) through a hexagon socket head cap screw, and a plurality of small steel balls (1.224) which are uniformly distributed are embedded in the outer plate surface of the outer ring plate (1.223);

at least one telescopic rod (1.225) is connected between the inner ring plate (1.222) and the outer ring plate (1.223), and the telescopic rod (1.225) is formed by sequentially sliding and sleeving a plurality of sections of casing pipes.

4. The chain block of claim 1, wherein: the protection system (2) comprises a ratchet wheel housing (2.1) and a hand chain housing (2.2), wherein a ratchet wheel (10) of the hand chain block covered by the ratchet wheel housing (2.1) is fixed on a left wall plate of the hand chain block, a hand chain wheel (1.2) of the hand chain block covered by the hand chain housing (2.2) and the ratchet wheel housing (2.1) are fixed on the left wall plate of the hand chain block, notches (2.20) are arranged on two sides of the hand chain housing (2.2), and a hand chain matched with the hand chain wheel (1.2) penetrates out of the notches (2.20);

protection system (2) still include flexible adjusting pad (2.3), flexible adjusting pad (2.3) set up in the interior top of hand chain housing (2.2) for keep apart hand chain on hand sprocket (1.2) and the interior top of hand chain housing (2.2).

5. A chain block according to claim 4, characterized in that: the flexible adjusting pad (2.3) comprises a bracket (2.31), a push-pull adjusting mechanism (2.32) and a flexible pad (2.33); the bracket (2.31) is arranged at the inner top of the bracelet cover (2.2); the number of the push-pull adjusting mechanisms (2.32) is multiple, and the push-pull adjusting mechanisms (2.32) are arranged side by side along the length direction of the support (2.31) in a posture facing the hand chain wheel (1.2); the flexible pad (2.33) is connected to the push-pull end of each push-pull adjusting mechanism (2.32) along the length direction of the support (2.31); the support (2.31), the push-pull adjusting mechanism (2.32), the flexible pad (2.33) and the hand chain wheel (1.2) are coplanar, and the flexible pad (2.33) is pushed by the push-pull adjusting mechanism (2.32) to bend towards the hand chain wheel (1.2) in an arc shape and extend into the hand chain wheel (1.2).

6. The chain block of claim 1, wherein: the bearing system (3) comprises a left wall plate (3.1), a right wall plate (3.2), a support rod (3.3), an upper lifting hook component (3.4), an upper hook shaft (3.40), a lifting chain wheel (3.5), a shaft sleeve (3.6), a lifting chain (3.7), a flat bolt (3.70), a lower lifting hook component (3.8) and a lifting pin (3.80); the left wall plate (3.1) is connected with the right wall plate (3.2) through a support rod (3.3); the upper lifting hook assembly (3.4) is connected to the upper top position between the left wall plate (3.1) and the right wall plate (3.2) through an upper hook shaft (3.40); the hoisting chain wheel (3.5) is arranged on a long shaft of the chain block, and the hoisting chain wheel (3.5) is matched with the left wall plate (3.1) and the right wall plate (3.2) through a shaft sleeve (3.6); the hoisting chain (3.7) is arranged on the hoisting chain wheel (3.5) in a matching way, one end of the hoisting chain is connected to the lower bottom position between the left wall plate (3.1) and the right wall plate (3.2) through a flat bolt (3.70), and the other end of the hoisting chain is connected with the lower hoisting hook component (3.8) through a hoisting pin (3.80) which is inserted;

the bearing system (3) further comprises a limit guide component (31) used for limit guide of the hoisting chain (3.7) and a chain stopping component (32) used for isolation of the hoisting chain (3.7); the two limiting guide parts (31) are distributed in a central symmetry manner about the hoisting chain wheel (3.5); the chain blocking part (32) is one and is positioned right below the hoisting chain wheel (3.5).

7. The chain block of claim 6, wherein: the limiting guide part (31) comprises a central shaft (31.1), an elastic fixing ring (31.2) and a contact cylinder (31.3); the central shaft (31.1) is rotatably connected between the left wall plate (3.1) and the right wall plate (3.2); at least two elastic fixing rings (31.2) are sleeved and fixed on the central shaft (31.1) respectively; contact cylinder (31.3) are a plurality of, the mounting groove (31.20) with contact cylinder (31.3) one-to-one are seted up to elastic fixing ring (31.2) periphery array, in notch embedding mounting groove (31.20) of contact cylinder (31.3) extrusion mounting groove (31.20), and contact cylinder (31.3) are parallel with center pin (31.1).

8. The chain block of claim 6, wherein: chain guard part (32) include mounting panel (32.1) and division board (32.2), mounting panel (32.1) are pegged graft between left wallboard (3.1) and right wallboard (3.2), division board (32.2) are fixed in mounting panel (32.1) upper surface and upwards extend partially stretch into in hoisting sprocket (3.5), but division board (32.2) are close to the both sides face of hoisting chain (3.7) and all inlay and are equipped with spin (32.20) that can freely roll.

9. The chain block of claim 1, wherein: the speed reducing system (4) comprises a right wall plate (3.2), a long shaft (4.1), a spline gear (4.2), a sheet gear (4.3), a short shaft (4.4), a steel sleeve (4.40), an external wall plate (4.5) and a gear cover (4.6); the long shaft (4.1) penetrates through the right wallboard (3.2), a hoisting chain wheel (3.5) of a chain block is arranged on the long shaft, and the hoisting chain wheel (3.5) is matched with the right wallboard (3.2) through a matched shaft sleeve (3.6); the spline gear (4.2) is arranged on a hoisting chain wheel (3.5), the short shaft (4.4) is connected between the right wall plate (3.2) and the outer wall plate (4.5) through a steel sleeve (4.40), the sheet gear (4.3) is arranged on the short shaft (4.4), the end teeth of the long shaft (4.1) are meshed with the sheet gear (4.3), and the shaft body teeth of the short shaft (4.4) are meshed with the spline gear (4.2); the gear cover (4.6) covers the outer wall plate (4.5) and is fixed on the right wall plate (3.2);

the upper end part and the lower end part of the external wall panel (4.5) are respectively provided with a connecting piece (4.50), the external wall panel (4.5) is covered with a spline gear (4.2) and a plate gear (4.3) and is arranged on the right wall panel (3.2) through the connecting piece (4.50), and the whole external wall panel (4.5) is transparent; the part of the gear cover (4.6) opposite to the external wall panel (4.5) is a transparent plate (4.6), and the transparent plate (4.6) is connected with the gear cover (4.6) through a matched rotary connecting piece (4.60).

10. The chain block of claim 9, wherein: the connecting piece (4.50) comprises a connecting plate (4.501), a damping rotating shaft (4.502) and a stop lever (4.503);

the connecting plate (4.501) is connected to the end of the external wall panel (4.5), the length of the connecting plate (4.501) is smaller than that of the end of the external wall panel (4.5), the right wall panel (3.2) is correspondingly provided with a through mounting opening (3.20), and the connecting plate (4.501) is inserted into the through mounting opening (3.20);

the damping rotating shaft (4.502) is embedded into the connecting plate (4.501), the stop lever (4.503) is perpendicular to the damping rotating shaft (4.502), and the stop lever (4.503) is in rotating fit with the connecting plate (4.501) through the damping rotating shaft (4.502); under the parallel state of pin (4.503) and connecting plate (4.501), connecting plate (4.501) insert and run through in installing port (3.20) and make pin (4.503) pass and run through installing port (3.20) to right wallboard (3.2) opposite side, rotate pin (4.503) friction right wallboard (3.2) and have the contained angle with connecting plate (4.501).

Images