CN211998604U

CN211998604U - Speed-adjustable chain block

Info

Publication number: CN211998604U
Application number: CN202020103926.4U
Authority: CN
Inventors: 苏小超
Original assignee: Baoding Shuangniao Hoisting Machinery Manufacturing Co ltd
Current assignee: Baoding Shuangniao Hoisting Machinery Manufacturing Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-11-24
Anticipated expiration: 2030-01-17

Abstract

The utility model relates to a speed adjustable chain block, which comprises two side plates which are arranged at intervals and are parallel to each other, wherein the two side plates are fixedly connected through a plurality of bolt groups; two articulated being provided with the lifting hook between the upper portion of curb plate, rotatable lifting sprocket that is provided with between the middle part of curb plate, lifting sprocket's wheel inslot is provided with the load chain, the free end of load chain is provided with down the lifting hook, lifting sprocket and two the link of curb plate extends to two respectively the curb plate outside. The utility model discloses a transmission setting makes chain block when the jack-up operation, and hoisting sprocket separates with the brake disc and is connected with drive gear to it is light laborsaving to make the jack-up operation through multi-stage gear transmission. When the chain block is in the no-load state for chain retracting operation, the hoisting chain wheel is separated from the transmission gear and is connected with the brake disc, so that the hoisting chain wheel and the manual chain wheel can synchronously rotate, and the working efficiency of chain retracting operation is improved.

Description

Speed-adjustable chain block

Technical Field

The utility model relates to a chain block technical field especially relates to a chain block with adjustable speed.

Background

The chain block is a manual hoisting device which is simple to use and convenient to carry, and is suitable for short-distance hoisting of small-sized equipment and goods. The chain block rotates by dragging the manual chain and the manual chain wheel, presses the friction plate ratchet wheel and the brake seat into a whole to rotate together, and the tooth long shaft rotates the plate gear, the tooth short shaft and the spline hole gear. Thus, the hoisting chain wheel arranged on the spline hole gear drives the hoisting chain, so that the heavy object is stably lifted. The ratchet friction plate type one-way brake can automatically brake under load, the pawl is meshed with the ratchet under the action of the spring, and the brake works safely. When the chain block at the present stage is used, the same transmission system is adopted in the hoisting process and the no-load chain retracting process, the rotation speed of the hoisting chain wheel is smaller than that of the chain wheel in a secondary gear transmission mode for labor saving operation during hoisting, and the chain retracting speed is lower and the working efficiency is poor under the condition that the rotation speed of the hoisting chain wheel is still smaller than that of the chain wheel during no-load chain retracting, so that the development of the novel chain block capable of adjusting the rotation speed of the hoisting chain wheel under the hoisting and no-load conditions is necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a chain block with adjustable speed solves the technical problem that the current chain block that relates to exists among the above-mentioned background art.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a speed adjustable chain block, which comprises two side plates which are arranged at intervals and are parallel to each other, wherein the two side plates are fixedly connected through a plurality of bolt groups; an upper lifting hook is hinged between the upper parts of the two side plates, a hoisting chain wheel is rotatably arranged between the middle parts of the side plates, a hoisting chain is arranged in a wheel groove of the hoisting chain wheel, a lower lifting hook is arranged at the free end of the hoisting chain, the connecting ends of the hoisting chain wheel and the two side plates respectively extend to the outer sides of the two side plates, a spline is fixedly arranged at one end of the hoisting chain wheel, and two connecting grooves are symmetrically formed at the other end of the hoisting chain wheel; a first connecting piece is arranged on the outer side of the spline, a spline hole matched with the spline is formed in the middle of the first connecting piece, and first teeth are arranged at one end, far away from the hoisting chain wheel, of the first connecting piece along the circumferential direction; a main shaft is inserted into the middle holes of the hoisting chain wheel and the spline, two ends of the main shaft are respectively positioned outside the hoisting chain wheel and the spline, a large spring is sleeved on the part of the main shaft positioned outside the spline, a five-tooth connecting section is arranged at one end of the main shaft close to the spline, and a circular gasket is arranged at the inner side end of the five-tooth connecting section of the main shaft; two rotatable five-tooth short shafts are symmetrically arranged on the side plate close to the spline along the main shaft, a transmission gear is sleeved on the main shaft at a position corresponding to the two five-tooth short shafts, a second connecting piece is arranged at one end of the transmission gear close to the first connecting piece, second teeth matched with the first teeth are arranged at the end part of the second connecting piece along the circumferential direction, a hollow groove is formed at one end of the transmission gear close to the circular gasket, a plurality of small springs are uniformly arranged in the hollow groove along the circumferential direction, and a gear gasket is arranged at the opening end of the hollow groove of the transmission gear; one end of each five-tooth short shaft, which is far away from the side plate, is fixedly connected with a sheet gear coaxially and respectively, and the two sheet gears are meshed with the five-tooth connecting section; the other end of the main shaft is sequentially provided with a first thread section, a second thread section and a straight tooth section from outside to inside, a brake disc is arranged outside the straight tooth section, a tooth groove matched with the straight tooth section is formed in the peripheral wall of a central hole of the brake disc, the brake disc is in a step shape, the part close to the side plate is a large head part, two connecting bulges matched with the two connecting grooves are symmetrically arranged at the large head part, a ratchet wheel is sleeved outside the small head part of the brake disc, a first friction plate is sleeved at the part, between the ratchet wheel and the large head part of the brake disc, of the small head part of the brake disc, and two pawls matched with the ratchet wheel are symmetrically arranged on the side plate close to the brake disc; the outside of the second thread section is provided with a manual chain wheel in threaded connection with the second thread section, a second friction plate is sleeved on a small head part of the brake disc, which is positioned between the manual chain wheel and the ratchet wheel, a hand zipper is arranged in a wheel groove of the manual chain wheel, and a limit nut in threaded connection with the first thread section is arranged on the outer side of the first thread section.

Furthermore, the connecting groove is specifically set to be a trapezoidal groove, and the connecting protrusion is a trapezoidal protrusion matched with the connecting protrusion.

Furthermore, a pin hole is formed in the first thread section, a plurality of pin grooves are uniformly formed in the limiting nut along the circumferential direction, and a connecting pin used for fixedly connecting the limiting nut and the first thread section is inserted into the pin hole and the pin grooves.

Furthermore, a protective cover used for covering the five-tooth connecting section and the two sheet gears is fixedly arranged on the outer side of the side plate close to the spline.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the utility model discloses a transmission setting makes chain block when the jack-up operation, and hoisting sprocket separates with the brake disc and is connected with drive gear to it is light laborsaving to make the jack-up operation through multi-stage gear transmission. When the chain block is in the no-load state for chain retracting operation, the hoisting chain wheel is separated from the transmission gear and is connected with the brake disc, so that the hoisting chain wheel and the manual chain wheel can synchronously rotate, and the working efficiency of chain retracting operation is improved.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal connection of the hoist sprocket to the drive gear;

FIG. 3 is a schematic view of the construction of a hoisting sprocket;

FIG. 4 is a schematic view of a transmission gear structure;

FIG. 5 is a schematic view of the outer structure of the left side portion of FIG. 1;

FIG. 6 is a schematic view of the outer side structure of the right side plate in FIG. 1;

FIG. 7 is a schematic view of the spindle configuration;

FIG. 8 is a schematic view of a five-tooth stub shaft configuration;

FIG. 9 is a schematic view of a brake disk configuration;

FIG. 10 is an enlarged view of the structure at A in FIG. 1;

description of reference numerals: 1. a side plate; 2. a bolt group; 3. an upper hook; 4. a hoisting sprocket; 5. a hoisting chain; 6. A lower hook; 7. a spline; 8. connecting grooves; 9. a first connecting member; 10. a splined bore; 11. a first tooth; 12. a main shaft; 13. a large spring; 14. a five-tooth connecting section; 15. a circular gasket; 16. a five-tooth short shaft; 17. a transmission gear; 18. a second connecting member; 19. a second tooth; 20. a hollow groove; 21. a small spring; 22. A gear spacer; 23. a sheet gear; 24. a first thread segment; 25. a second thread segment; 26. a straight tooth section; 27. a brake disc; 28. a connecting projection; 29. a ratchet wheel; 30. a first friction plate; 31. a pawl; 32. a manual sprocket; 33. a second friction plate; 34. a hand zipper; 35. a limit nut; 36. a pin hole; 37. a pin slot; 38. a shield.

Detailed Description

As shown in fig. 1-10, a speed-adjustable chain block comprises two side plates 1 which are arranged at intervals and are parallel to each other, wherein the two side plates 1 are fixedly connected through a plurality of bolt groups 2. Two articulated between the upper portion of curb plate 1 install lifting hook 3, two rotatable lifting sprocket 4 of installing between the middle part of curb plate 1, lifting sprocket 4's wheel inslot is around being equipped with lifting chain 5, lifting hook 6 is installed down to 5 free ends of lifting chain.

The hoisting chain wheel 4 and two the link of curb plate 1 extends to two respectively the outside of curb plate 1, and one end is fixed and is provided with spline 7, and two spread grooves 8 have been seted up to the other end symmetry.

As shown in fig. 2, (for convenience of observation, the positions of the components in the drawing in fig. 2 are offset and dislocated to some extent, and the actual positions of the components are based on the description of the text) a first connecting piece 9 is fixedly arranged on the outer side of the spline 7, a spline hole 10 matched with the spline 7 is formed in the middle of the first connecting piece 9, and a first tooth 11 is circumferentially arranged at one end, away from the hoisting sprocket 4, of the first connecting piece 9. The hoisting chain wheel 4 and the middle hole of the spline 7 are internally provided with a main shaft 12 in an inserting way, two ends of the main shaft respectively extend to the hoisting chain wheel 4 and the outside of the spline 7, and the part of the main shaft 12, which is positioned at the outer side of the spline 7, is sleeved with a large spring 13. One end of the main shaft 12 close to the spline 7 is provided with a five-tooth connecting section 14, and the inner side end of the main shaft 12 at the five-tooth connecting section 14 is provided with a circular gasket 15. Two rotatable five-tooth short shafts 16 are symmetrically arranged on the side plate 1 close to the spline 7 along the main shaft 12, and transmission gears 17 meshed with the two five-tooth short shafts 16 are sleeved on the main shaft 12 at positions corresponding to the two five-tooth short shafts 16. A second connecting piece 18 is fixedly arranged at one end, close to the first connecting piece 9, of the transmission gear 17, the second connecting piece 18 is arranged opposite to the first connecting piece 9, and second teeth 19 matched with the first teeth 11 are arranged at the end part of the second connecting piece 18 along the circumferential direction. One end of the transmission gear 17 close to the circular gasket 15 is provided with a hollow groove 20, a plurality of small springs 21 are uniformly arranged in the hollow groove 20 along the circumferential direction, and a gear gasket 22 matched with the hollow groove 20 is arranged at the opening end of the hollow groove 20 of the transmission gear 17. One end of each five-tooth short shaft 16, which is far away from the side plate 1, is fixedly connected with a sheet-shaped gear 23 coaxially, and the two sheet-shaped gears 23 are meshed with the five-tooth connecting section 14.

The other end of the main shaft extends to the outside of the hoisting chain wheel 4 and the side part 1, and is provided with a first thread section 24, a second thread section 25 and a straight tooth section 26 from outside to inside in sequence. A brake disc 27 is arranged outside the straight tooth section 26, a tooth groove matched with the straight tooth section 26 is arranged on the peripheral wall of a central hole of the brake disc 27, the brake disc 27 is specifically designed to be step-shaped, the part close to the side plate 1 is a large head, and two connecting bulges 28 matched with the two connecting grooves 8 are symmetrically arranged at the large head end. The little head outside cover of brake disc 27 is equipped with ratchet 29, ratchet 29's centre bore with the little head clearance fit of brake disc 27, just the little head of brake disc 27 is located ratchet 29 with position cover between the major part portion of brake disc is equipped with first friction disc 30, is close to brake disc 29 the symmetry install on the curb plate 1 two with the pawl 31 of ratchet 29 looks adaptation. And a manual chain wheel 32 in threaded connection with the second thread section 25 is mounted on the outer part of the second thread section 25, and a second friction plate 33 is sleeved at the position, between the manual chain wheel 32 and the ratchet wheel 29, of the small head part of the brake disc 29. A hand zipper 34 is arranged in a wheel groove of the manual chain wheel 32, and a limit nut 35 in threaded connection with the first thread section 24 is installed on the outer side of the first thread section.

In this embodiment, the connecting groove 8 is specifically configured as a trapezoidal groove, and the connecting protrusion is a trapezoidal protrusion matched with the connecting protrusion.

As a further improvement, the present invention provides a pin hole 36 on the first thread section 24, a plurality of pin grooves 37 have been evenly opened along the circumference on the stop nut 24, and the pin hole 36 and the pin grooves 37 are inserted with a connecting pin for fixedly connecting the stop nut 35 and the first thread section 24.

In addition, a protective cover 38 for covering the five-tooth connecting section and the two sheet gears is fixedly arranged on the outer side of the side plate 1 close to the spline 7, and the ends of the main shaft and the two five-tooth short shafts are rotatably connected with the protective cover 38.

The utility model discloses a working method does: when the chain block is used for hoisting heavy objects, an operator drives the manual chain wheel to rotate by pulling the manual zipper, and the manual chain wheel is in threaded connection with the second thread section, so that the manual chain wheel can move in the direction from the second thread end to the brake disc in the rotating process until the second friction plate, the ratchet wheel, the first friction plate and the brake disc are integrated under the action of pressing force and friction force to enable the chain block to be switched to a hoisting state. Meanwhile, because the operator has exerted great effort to the hand sprocket when handling the heavy object, under the pulling force effect, originally on the brake disc with spread groove matched with connect protruding can follow the spread groove in roll-off, thereby make brake disc and jack-up sprocket separation, the in-process brake disc of connecting protruding roll-off can take place the position dislocation, because brake disc and main shaft fixed connection, corresponding position dislocation also can take place for the main shaft, and the circular gasket that is located five tooth linkage segment sides can produce pressure to gear gasket and drive gear at the offset in-process, thereby make drive gear shift to the direction of jack-up pulley until the second tooth on the second connecting piece mesh with the first tooth on the first connecting piece mutually, and under the condition of the pressure of circular gasket and the load on the jack-up sprocket, two sets of teeth are difficult for breaking away from. The connection between the hoisting chain wheel and the transmission gear is realized. Further rotation of the manual sprocket 20 causes the main shaft 8 to rotate together. The five-tooth connecting section is meshed with the two sheet gears in the rotating process, the two five-tooth short shafts fixedly connected with the sheet gears are meshed with the transmission gear, and the transmission gear is fixedly connected with the hoisting chain wheel 4 through the second connecting piece, the first connecting piece and the spline, so that the hoisting chain wheel 4 rotates in the rotating process of the main shaft 8 to drive the hoisting chain to stably lift heavy objects, and the multi-stage gear transmission is more rapid and labor-saving.

When the heavy object is unloaded, when the chain is received and released under the no-load state, because the pulling force that the hand power chain bore is less, can make the connection arch on the brake disc cooperate with jack-up sprocket's spread groove again and the difficult roll-off of rotation in-process, make the brake disc be connected with jack-up sprocket. When the connecting bulge is scratched into the connecting groove, the brake disc drives the main shaft to reset and deflect, so that the circular gasket does not apply pressure on the gear gasket and the transmission gear, the second connecting piece can be separated from the first connecting piece under the action of the large spring, and the hoisting chain wheel is separated from the transmission gear. At this time, in the process of rotating the manual chain wheel, the hoisting chain wheel and the manual chain wheel rotate synchronously, so that the rapid chain folding and unfolding is realized.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. A chain block with adjustable speed which characterized in that: the side plates are arranged at intervals and are parallel to each other, and the two side plates are fixedly connected through a plurality of bolt groups; an upper lifting hook is hinged between the upper parts of the two side plates, a hoisting chain wheel is rotatably arranged between the middle parts of the side plates, a hoisting chain is arranged in a wheel groove of the hoisting chain wheel, a lower lifting hook is arranged at the free end of the hoisting chain, the connecting ends of the hoisting chain wheel and the two side plates respectively extend to the outer sides of the two side plates, a spline is fixedly arranged at one end of the hoisting chain wheel, and two connecting grooves are symmetrically formed at the other end of the hoisting chain wheel; a first connecting piece is arranged on the outer side of the spline, a spline hole matched with the spline is formed in the middle of the first connecting piece, and first teeth are arranged at one end, far away from the hoisting chain wheel, of the first connecting piece along the circumferential direction; a main shaft is inserted into the middle holes of the hoisting chain wheel and the spline, two ends of the main shaft are respectively positioned outside the hoisting chain wheel and the spline, a large spring is sleeved on the part of the main shaft positioned outside the spline, a five-tooth connecting section is arranged at one end of the main shaft close to the spline, and a circular gasket is arranged at the inner side end of the five-tooth connecting section of the main shaft; two rotatable five-tooth short shafts are symmetrically arranged on the side plate close to the spline along the main shaft, a transmission gear is sleeved on the main shaft at a position corresponding to the two five-tooth short shafts, a second connecting piece is arranged at one end of the transmission gear close to the first connecting piece, second teeth matched with the first teeth are arranged at the end part of the second connecting piece along the circumferential direction, a hollow groove is formed at one end of the transmission gear close to the circular gasket, a plurality of small springs are uniformly arranged in the hollow groove along the circumferential direction, and a gear gasket is arranged at the opening end of the hollow groove of the transmission gear; one end of each five-tooth short shaft, which is far away from the side plate, is fixedly connected with a sheet gear coaxially and respectively, and the two sheet gears are meshed with the five-tooth connecting section; the other end of the main shaft is sequentially provided with a first thread section, a second thread section and a straight tooth section from outside to inside, a brake disc is arranged outside the straight tooth section, a tooth groove matched with the straight tooth section is formed in the peripheral wall of a central hole of the brake disc, the brake disc is in a step shape, the part close to the side plate is a large head part, two connecting bulges matched with the two connecting grooves are symmetrically arranged at the large head part, a ratchet wheel is sleeved outside the small head part of the brake disc, a first friction plate is sleeved at the part, between the ratchet wheel and the large head part of the brake disc, of the small head part of the brake disc, and two pawls matched with the ratchet wheel are symmetrically arranged on the side plate close to the brake disc; the outside of the second thread section is provided with a manual chain wheel in threaded connection with the second thread section, a second friction plate is sleeved on a small head part of the brake disc, which is positioned between the manual chain wheel and the ratchet wheel, a hand zipper is arranged in a wheel groove of the manual chain wheel, and a limit nut in threaded connection with the first thread section is arranged on the outer side of the first thread section.

2. The speed adjustable chain block of claim 1, wherein: the connecting groove is specifically arranged as a trapezoidal groove, and the connecting bulge is a trapezoidal bulge matched with the connecting bulge.

3. The speed adjustable chain block of claim 1, wherein: the first thread section is provided with a pin hole, the limiting nut is uniformly provided with a plurality of pin grooves along the circumferential direction, and connecting pins for fixedly connecting the limiting nut and the first thread section are inserted in the pin hole and the pin grooves.

4. The speed adjustable chain block of claim 1, wherein: and a protective cover used for coating the five-tooth connecting section and the two sheet gears is fixedly arranged on the outer side of the side plate close to the spline.