CN210764074U

CN210764074U - Speed reducer for electric hoist

Info

Publication number: CN210764074U
Application number: CN201921743926.4U
Authority: CN
Inventors: 陈金辉
Original assignee: Zhejiang Tonnemax Hoist & Crane Machinery Co ltd
Current assignee: Zhejiang Tonnemax Hoist & Crane Machinery Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-06-16
Anticipated expiration: 2029-10-17

Abstract

The utility model provides a decelerator for electric block belongs to hoisting machinery technical field. It has solved the not compact scheduling problem enough of current decelerator for electric block structure. This decelerator for electric block includes the casing, the transmission shaft is located the casing with the coaxial setting of casing and the inner of transmission shaft, the outer end of transmission shaft stretches out the casing and is used for linking firmly with the pivot axial of motor, be equipped with planetary gear reduction mechanism in the casing, planetary gear reduction mechanism's input gear links firmly mutually with the inner of transmission shaft, the cover is equipped with the transmission section of thick bamboo that is the tube-shape on the transmission shaft, the transmission section of thick bamboo has the link that stretches out the casing and is used for connecting the reel, planetary gear reduction mechanism's output gear cover is on the transmission section of thick bamboo and. The utility model has the advantages of compact structure, good bearing capacity, large transmission ratio and the like.

Description

Speed reducer for electric hoist

Technical Field

The utility model belongs to the technical field of hoisting machinery, a electric block is related to, in particular to decelerator for electric block.

Background

The electric hoist is a special hoisting device, is arranged on a crown block and a gantry crane, has the characteristics of small volume, light dead weight, simple operation, convenient use and the like, and is widely applied to places such as industrial and mining enterprises, storage docks and the like. The electric hoist generally comprises a motor, a transmission mechanism, a brake or a reduction gearbox, a winding drum or a chain wheel, a steel wire rope, a hook device and the like.

For example, chinese patent literature discloses a compact electric chain hoist [ application No.: 201320566479.6, respectively; authorization notice number: CN203568738U ], which comprises a speed reducer assembly, a motor assembly, a chain assembly and a common box, wherein an output shaft end of a stator and a rotor of the motor assembly is fixed on a front end seat of the stator and the rotor inside the common box, the other end of the stator and the rotor of the motor assembly is provided with a rear end cover of the stator and the rotor, the rear end cover of the stator and the rotor is connected with one side of the common box, the speed reducer assembly is arranged on the other side of the common box, an output shaft of the stator and the rotor of the motor assembly is connected with an input gear of the speed reducer assembly, an output gear of the speed reducer assembly is arranged at one end of the output shaft of the speed reducer assembly in a cantilever manner, and two ends of the output shaft of the speed reducer assembly are respectively sleeved with a support bearing, the support bearings are fixed on a support bearing seat inside the common box, The first gear shaft and the second gear are respectively sleeved at one end of the first gear shaft and one end of the second gear shaft, the input gear is meshed with the first gear, the first gear shaft is meshed with the second gear, the second gear shaft is meshed with the output gear, fixed bearings are arranged at two ends of the first gear shaft and two ends of the second gear shaft, and fixed bearing seats matched with the fixed bearings are arranged in the shared box.

The compact structure type electric chain hoist has compact structure through the arrangement of the shared box body, but the chain assembly is independent, so the structure is still not compact enough, and the speed reducer assembly is driven by the input gear, the first gear shaft, the second gear shaft and the output gear, so the load bearing capacity and the transmission ratio are still not ideal enough.

Disclosure of Invention

The utility model aims at providing a to the above-mentioned problem that exists among the prior art, a speed reduction gear for electric block that compact structure, bearing capacity are good and drive ratio is big is provided.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a decelerator for electric block, includes casing, transmission shaft, its characterized in that, transmission shaft and the coaxial setting of casing and the inner of transmission shaft be located the casing, the outer end of transmission shaft stretches out the casing and is used for linking firmly with the pivot axial of motor, the casing in be equipped with planetary gear reduction mechanism, planetary gear reduction mechanism's input gear link firmly mutually with the inner of transmission shaft, the transmission shaft on the cover be equipped with the transmission section of thick bamboo that is the tube-shape, the transmission section of thick bamboo have the link that stretches out the casing and be used for connecting the reel, planetary gear reduction mechanism's output gear overlaps on the transmission section of thick bamboo and meshes mutually with the transmission section of thick bamboo.

In the above-mentioned speed reducer for an electric hoist, the planetary gear speed reducing mechanism is a two-stage speed reducing mechanism. Therefore, the transmission ratio is large, so that the rotating speed of the transmission cylinder is slow and stable, and the working stability is good.

In the reduction gear for an electric hoist, the connecting end of the transmission cylinder is sleeved with the connecting disc, and the connecting end is meshed with the connecting disc. The link passes through the connection pad and is connected with the reel like this, has further increased the drive ratio for job stabilization.

In foretell decelerator for electric block, planetary gear reduction mechanism include that a plurality of centers on the input gear setting and all with input gear engaged with one-level planetary gear, shells inner wall be equipped with the one-level ring gear that supplies one-level planetary gear engaged with, the transmission shaft on the cover be equipped with the transmission tooth cover, transmission tooth cover overcoat have the one-level drive wheel, the one-level drive wheel is connected with the one-level transfer line of wearing to establish with one-level planetary gear one-to-one, planetary gear reduction mechanism still include that a plurality of centers on the setting of transmission tooth cover and all with the second grade planetary gear that the transmission tooth cover engaged with, shells inner wall be equipped with the second grade ring gear that supplies second grade planetary gear engaged with, output gear be connected with the second grade transfer line of wearing to establish with second grade planetary gear one-to-one. When the winding drum works, the input gear drives the first-stage planetary gear to rotate, the first-stage planetary gear drives the first-stage driving wheel to rotate, the first-stage driving wheel drives the transmission gear sleeve to rotate, the transmission gear sleeve drives the second-stage planetary gear to rotate, the second-stage planetary gear drives the output gear to rotate, the output gear drives the transmission drum to rotate, and the transmission drum enables the winding drum to rotate.

In the speed reducer for the electric hoist, the primary gear ring and the secondary gear ring are integrated with the shell. The first-stage gear ring and the second-stage gear ring are directly machined on the inner wall of the shell, so that the structure is compact, the structural strength is high, and the bearing capacity of the first-stage gear ring and the second-stage gear ring is improved.

In the speed reducer for the electric hoist, the inner end of the transmission shaft is fixedly connected with the input gear through a spline. Therefore, the transmission shaft is stably connected with the input gear, and the torque transmission effect is good.

In the speed reducer for the electric hoist, a first bearing is arranged between the inner wall of the connecting end of the transmission cylinder and the transmission shaft. The first bearing enables the transmission shaft to have a good supporting effect on the transmission cylinder, and the transmission cylinder has good working stability.

In the speed reducer for the electric hoist, the shell comprises a rear cover and a front cover, the connecting end of the transmission cylinder extends out of the front cover, a second bearing is arranged in the middle of the rear cover, and the inner end of the transmission shaft penetrates through the second bearing. The rear cover and the front cover are convenient to assemble, and the bearing II enables the transmission shaft to have good working stability.

Compared with the prior art, the speed reducer for the electric hoist has the advantages of good bearing capacity, large transmission ratio, compact structure, space saving, good working stability and long service life.

Drawings

Fig. 1 is a sectional view of the reduction gear for an electric hoist.

Fig. 2 is a schematic structural view of a first-stage planetary gear in the speed reducer for the electric block.

Fig. 3 is a schematic structural view of a secondary planetary gear in the reduction gear for the electric block.

In the figure, 1, a housing; 2. a drive shaft; 3. an input gear; 4. a transmission cylinder; 41. a connecting end; 5. an output gear; 6. a connecting disc; 7. a primary planetary gear; 8. a primary gear ring; 9. a transmission gear sleeve; 10. a primary transmission rod; 11. a secondary planetary gear; 12. a secondary gear ring; 13. a secondary transmission rod; 14. a first bearing; 15. a rear cover; 16. a front cover; 17. and a second bearing.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, this decelerator for electric block includes casing 1, transmission shaft 2 is located casing 1 with casing 1 coaxial setting and the inner of transmission shaft 2, the outer end of transmission shaft 2 stretches out casing 1 and is used for linking firmly with the pivot axial of motor, be equipped with planetary gear reduction mechanism in the casing 1, planetary gear reduction mechanism's input gear 3 links firmly with the inner of transmission shaft 2 mutually, the cover is equipped with transmission cylinder 4 that is the tube-shape on the transmission shaft 2, transmission cylinder 4 has the link 41 that stretches out casing 1 and is used for connecting the reel, planetary gear reduction mechanism's output gear 5 overlaps on transmission cylinder 4 and meshes with transmission cylinder 4 mutually.

The speed reducer for the electric hoist has the advantages of good bearing capacity and large transmission ratio by the arrangement of the planetary gear speed reducing mechanism, the transmission shaft 2 is axially and fixedly connected with the rotating shaft of the motor, and the connecting end 41 of the transmission cylinder 4 is connected with the winding drum, so that the winding drum is positioned between the motor and the shell 1, a winding drum chain does not need to be independently removed, and the structure is compact; this decelerator for electric block during operation, the motor drives transmission shaft 2 rotatory, and transmission shaft 2 drives planetary gear reduction mechanism's input gear 3 rotatory, and through planetary gear reduction mechanism's speed reduction, planetary gear reduction mechanism's output gear 5 drives transmission section of thick bamboo 4 rotatory, and transmission section of thick bamboo 4's link 41 drives the reel and rotates to the coiling of chain on the realization reel.

In more detail, for the purpose of large transmission ratio and stable operation, the planetary gear reduction mechanism is a two-stage reduction mechanism, the connecting end 41 of the transmission cylinder 4 is sleeved with the connecting disc 6, and the connecting end 41 is meshed with the connecting disc 6. As shown in fig. 1, 2 and 3, in this embodiment, the planetary gear reduction mechanism includes two primary planetary gears 7 disposed around the input gear 3 and engaged with the input gear 3, a primary gear ring 8 for engaging with the primary planetary gears 7 is disposed on an inner wall of the housing 1, a transmission gear sleeve 9 is sleeved on the transmission shaft 2, a primary transmission wheel is sleeved outside the transmission gear sleeve 9, the primary transmission wheel is connected with primary transmission rods 10 penetrated through the primary planetary gears 7 in a one-to-one correspondence manner, the planetary gear reduction mechanism further includes three secondary planetary gears 11 disposed around the transmission gear sleeve 9 and engaged with the transmission gear sleeve 9, a secondary gear ring 12 for engaging with the secondary planetary gears 11 is disposed on an inner wall of the housing 1, and the output gear 5 is connected with secondary transmission rods 13 penetrated through the secondary planetary gears 11 in a one-to one correspondence manner.

In order to have compact structure and high structural strength, the primary gear ring 8 and the secondary gear ring 12 are integrated with the shell 1; in order to achieve stable connection and good torque transmission effect, the inner end of the transmission shaft 2 is fixedly connected with the input gear 3 through a spline; in order to have good supporting effect and good working stability, a first bearing 14 is arranged between the inner wall of the connecting end 41 of the transmission cylinder 4 and the transmission shaft 2, the shell 1 comprises a rear cover 15 and a front cover 16, the connecting end 41 of the transmission cylinder 4 extends out of the front cover 16, a second bearing 17 is arranged in the middle of the rear cover 15, and the inner end of the transmission shaft 2 penetrates through the second bearing 17.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a decelerator for electric block, includes casing (1), transmission shaft (2), its characterized in that, transmission shaft (2) and casing (1) coaxial setting and the inner of transmission shaft (2) be located casing (1), the outer end of transmission shaft (2) stretch out casing (1) and be used for linking firmly with the pivot axial of motor, casing (1) in be equipped with planetary gear reduction mechanism, planetary gear reduction mechanism's input gear (3) link firmly with the inner of transmission shaft (2) mutually, transmission shaft (2) go up the cover and be equipped with transmission cylinder (4) that are the tube-shape, transmission cylinder (4) have link (41) that stretch out casing (1) and be used for connecting the reel, planetary gear reduction mechanism's output gear (5) overlap on transmission cylinder (4) and mesh mutually with transmission cylinder (4).

2. The reduction gear for electric hoist according to claim 1, wherein the planetary gear reduction mechanism is a two-stage reduction mechanism.

3. The reduction gear for electric hoist according to claim 2, characterized in that the connection end (41) of the transmission cylinder (4) is externally sleeved with the connection plate (6) and the connection end (41) is engaged with the connection plate (6).

4. The reduction gear for the electric hoist according to claim 3, characterized in that the planetary gear reduction mechanism comprises a plurality of primary planetary gears (7) which are arranged around the input gear (3) and are engaged with the input gear (3), the inner wall of the housing (1) is provided with a primary gear ring (8) for engaging with the primary planetary gears (7), the transmission shaft (2) is sleeved with a transmission gear sleeve (9), the transmission gear sleeve (9) is sleeved with a primary transmission wheel, the primary transmission wheel is connected with primary transmission rods (10) which are penetrated and arranged correspondingly with the primary planetary gears (7), the planetary gear reduction mechanism further comprises a plurality of secondary planetary gears (11) which are arranged around the transmission gear sleeve (9) and are engaged with the transmission gear sleeve (9), the inner wall of the housing (1) is provided with a secondary gear ring (12) for engaging with the secondary planetary gears (11), the output gear (5) is connected with secondary transmission rods (13) which are arranged in a penetrating way and correspond to the secondary planet gears (11) one by one.

5. The reduction gear for the electric hoist according to claim 4, wherein the primary ring gear (8) and the secondary ring gear (12) are both of an integral structure with the housing (1).

6. The reduction gear for the electric hoist according to claim 5, characterized in that the inner end of the transmission shaft (2) is fixedly connected with the input gear (3) through a spline.

7. The reduction gear for electric block of claim 6, characterized in that a first bearing (14) is arranged between the inner wall of the connecting end (41) of the transmission cylinder (4) and the transmission shaft (2).

8. The reduction gear for electric hoist according to claim 7, characterized in that the housing (1) comprises a rear cover (15) and a front cover (16), the connecting end (41) of the transmission cylinder (4) extends out of the front cover (16), a second bearing (17) is arranged in the middle of the rear cover (15), and the inner end of the transmission shaft (2) penetrates through the second bearing (17).