CN215334255U

CN215334255U - Speed reduction transmission device and hoisting hoist

Info

Publication number: CN215334255U
Application number: CN202121759499.6U
Authority: CN
Inventors: 曾剑
Original assignee: Chongqing Toho Rongkee Electronic And Machinery Co ltd
Current assignee: Chongqing Toho Rongkee Electronic And Machinery Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-28
Anticipated expiration: 2031-07-30
Also published as: WO2023004990A1

Abstract

The utility model belongs to the technical field of hoisting hoists, and particularly discloses a speed reduction transmission device which comprises a shell, a long shaft, a gear transmission mechanism, a hoisting chain wheel, a power chain wheel and a braking device, wherein the gear transmission mechanism comprises a primary gear set, a secondary gear set and a tertiary gear set; the primary gear set comprises a long shaft gear and two primary gears; the secondary gear set comprises two intermediate gears and a plate gear, and the intermediate gears are fixedly connected with the primary gear; the three-level gear set comprises a flower hole gear and two short shaft gears, the flower hole gear is in running fit with the long shaft, the two short shaft gears are fixedly connected with the two plate gears respectively, and the flower hole gear is fixedly connected with the hoisting chain wheel. The utility model also discloses a hoisting hoist, which comprises the speed reduction transmission device, a hoisting chain and a power chain. This scheme compact structure obtains bigger reduction ratio in very little space, increases one-level transmission structure when making transmission appearance small and exquisite, and the speed reduction effect is better.

Description

Speed reduction transmission device and hoisting hoist

Technical Field

The utility model belongs to the technical field of lifting hoists, and particularly relates to a speed reduction transmission device and a lifting hoist.

Background

The calabash is a small-sized hoisting mechanical device, is widely applied to various industries and occasions due to simple use and convenient carrying, is mainly suitable for places such as factories, mines, construction sites, docks, warehouses and the like, and is used for installing machines, hoisting goods and the like. The calabash is mainly divided into hand block and electric block, and hand block generally is applicable to the not big or short-term occasion of using of weight of lifting by crane, and electric block generally is applicable to the great relatively higher occasion of lifting height of the great lifting height of weight of lifting by crane.

The hoist generally comprises a transmission device, a pulling chain, a lifting hook, a hook and the like, wherein the transmission device is used as the most important structure of the hoist and plays a role in reducing the pulling force. For example, the patent of the applicant's application with publication number CN212151445U discloses a chain block, which uses a transmission device composed of a primary gear and two secondary gears to complete the transmission of power, so as to greatly reduce the hand pulling force, and has the advantages of compact structure, high strength, light weight, good sealing performance, long service life, good chain guiding effect, etc.

However, the applicant found in long-term practice that the above chain block has a limited capability of reducing the hand pulling force when aiming at heavy weight, mainly because the gear ratio of the transmission gear in the transmission device is small, the reduction of the speed and the force cannot be realized well, and for the above problem, the current common solution is to increase the diameter of the transmission gear to increase the gear ratio, but the increase of the diameter of the transmission gear inevitably increases the space occupation, i.e. the volume of the transmission device is increased, so that the appearance of the transmission device becomes large, the appearance is poor, and the transportation is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a speed reduction transmission device and a lifting hoist, which have compact structures, obtain larger speed reduction ratio in a small space, increase a primary transmission structure while making the appearance of the transmission device small and exquisite and have better speed reduction effect.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the speed reduction transmission device comprises a shell, a long shaft, a gear transmission mechanism, a hoisting chain wheel, a power chain wheel and a braking device for braking the long shaft in a one-way mode, wherein the long shaft, the gear transmission mechanism, the hoisting chain wheel, the power chain wheel and the braking device are arranged in the shell;

the gear transmission mechanism comprises a primary gear set, a secondary gear set and a tertiary gear set which are sequentially arranged from the outer end to the inner side of the long shaft;

the primary gear set comprises a long shaft gear fixedly connected to the outer end of the long shaft and two primary gears meshed with the long shaft gear; the secondary gear set comprises two intermediate gears and two plate gears meshed with the intermediate gears, and the intermediate gears are fixedly connected with the primary gear; the three-stage gear set comprises a flower hole gear and two short shaft gears meshed with the flower hole gear, the flower hole gear is in running fit with the long shaft, the two short shaft gears are fixedly connected with the two plate gears respectively, and the flower hole gear is fixedly connected with the hoisting chain wheel.

Based on the scheme, the principle of the lifting chain device is that the power chain wheel is the input end of the lifting chain device, when the lifting chain device is used, a chain is pulled by a hand power or electric driving mode to drive the power chain wheel to rotate, the power chain wheel is fixedly connected with the long shaft, so that the power chain wheel can drive the long shaft to rotate, the long shaft transmits power to the gear transmission mechanism, the long shaft gear rotates along with the long shaft, the long shaft gear drives two primary gears meshed with the long shaft gear to rotate, the primary gears rotate to drive the plate gears to rotate through the intermediate gears, the plate gears rotate to drive the hole gears to rotate through the short shaft gears, and the hole gears are fixedly connected with the lifting chain wheel, so that the lifting chain can be lifted.

This scheme realizes tertiary deceleration through one-level gear train, secondary gear train and tertiary gear train, compares with traditional secondary transmission, and this transmission provides bigger tooth ratio, can reduce hand power or electric drive power when promoting the heavy object, and is light and handy laborsaving during the use, improves hoisting efficiency, reduces staff's intensity of labour. The device has reasonable integral structure design, the length of the long shaft is slightly increased in the axial direction, the width in the radial direction is not changed, the volume of the whole device is not greatly changed, the structure is compact, a larger reduction ratio is obtained in a small space, a primary transmission structure is added while the appearance of the transmission device is small, the reduction effect is better, and the device is particularly suitable for the condition that the weight of a heavy object reaches 1 ton or more.

Preferably, first wallboard and the second wallboard of fixedly connected with in the shell, first wallboard are located between one-level gear train and the second grade gear train, one-level gear and piece gear all with first wallboard normal running fit, the second wallboard is located between tertiary gear train and the hoisting sprocket, stub shaft gear and second wallboard normal running fit. The first-level gear set, the second-level gear set and the third-level gear set are separated through the first wall plate and the second wall plate, interference is avoided, and support is provided for the transmission mechanism.

Preferably, two one-level gears are respectively located two diagonal angles of first wallboard, make two one-level gears slant align, and then reduce the occupation space of two one-level gears on height and width, make device inner structure more compact, reduce the device volume.

Preferably, the shell includes the cover body and left end lid and the right-hand member lid of fixed connection in cover body both ends, and the left end lid inboard is equipped with the mounting groove, can dismantle in the mounting groove and be connected with the location connecting plate, major axis gear and two one-level gears all with location connecting plate normal running fit. The positioning connecting plate limits the long shaft gear and the two first-level gears, operation stability is guaranteed, quick positioning between the left end cover and the cover body can be achieved through matching between the mounting groove and the positioning connecting plate, and assembly efficiency is improved.

Preferably, the braking device comprises a brake seat, a friction plate I, a ratchet wheel, a friction plate II, a pawl spring and a pawl, wherein the pawl spring and the pawl are fixed in the shell through a pawl pin, the brake seat is fixedly sleeved on the long shaft, the friction plate I, the ratchet wheel and the friction plate II are sequentially sleeved on the brake seat, the friction plate I, the ratchet wheel and the friction plate II are clamped between the brake seat and the power chain wheel, and the pawl is clamped on the ratchet wheel.

Preferably, a spline housing is arranged between the flower hole gear and the long shaft, the spline housing is formed by a part of the hoisting chain wheel extending to one side of the flower hole gear, the spline housing is rotatably sleeved on the long shaft, an external spline is arranged on the outer contour of the spline housing, and an internal spline matched with the spline housing is arranged in an inner hole of the flower hole gear. Rotation spacing between the flower hole gear and the hoisting sprocket is realized through spline fit, and the fit is stable.

Preferably, the cover body inboard is equipped with the ladder groove, and second wallboard joint is in the ladder inslot, and second wallboard middle part is equipped with the through-hole, and running fit has the axle sleeve between through-hole and the spline housing.

The utility model also discloses a hoisting hoist, which comprises the speed reduction transmission device, a hoisting chain and a power chain, wherein the hoisting chain is meshed with the hoisting chain wheel, and the power chain is meshed with the power chain wheel.

Preferably, couple under hoist chain lower extreme fixedly connected with, the couple is for machinery from locking-type couple down, compares with the couple of traditional hoist crane, and couple anticreep effect in this scheme is better, and the locking mode is also more stable.

The beneficial effect of this scheme: this scheme is under the prerequisite that does not increase the device volume, through having increased one-level drive gear group, has increased the speed reduction ratio, and is lighter and more laborsaving during the use, improves jack-up efficiency, reduces staff's intensity of labour.

Drawings

FIG. 1 is an exploded view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

fig. 3 is a schematic diagram of the internal structure of an embodiment of the present invention;

FIG. 4 is a schematic diagram of the engagement of a primary gear set and a long axis gear in an embodiment;

FIG. 5 is a schematic diagram of the engagement of the secondary gear and the tertiary gear set in the embodiment;

FIG. 6 is a schematic view of the left end cap of the embodiment;

FIG. 7 is a schematic view of a braking device in an embodiment;

fig. 8 is a schematic diagram of a hoist in an embodiment.

Reference numerals in the drawings of the specification include: the lifting device comprises a long shaft 10, a long shaft gear 11, a primary gear 12, a middle gear 13, a plate gear 14, a short shaft gear 15, a spline gear 16, a positioning connecting plate 17, a mounting groove 18, a first wall plate 20, a second wall plate 30, a lifting chain wheel 40, a power chain wheel 50, a braking device 60, a pawl 601, a ratchet wheel 602, a friction plate 603, a brake seat 604, a power chain 70, a lifting chain 80, an upper hook 90, a lower hook 91, a left end cover 101, a cover body 102 and a right end cover 103.

Detailed Description

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The term "sequentially comprising A, B, C, etc" merely indicates the order of the included elements A, B, C, etc. and does not exclude the possibility of including other elements between a and B and/or between B and C. The description of "first" and its variants is merely for distinguishing the components and does not limit the scope of the utility model, and "first" may be written as "second" and the like without departing from the scope of the utility model.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to fig. 1 to 8.

The embodiment provides a speed reduction transmission device, which comprises a shell, a long shaft 10, a gear transmission mechanism, a hoisting chain wheel 40, a power chain wheel 50 and a brake device 60 for braking the long shaft 10 in a one-way mode, wherein the long shaft 10, the gear transmission mechanism, the hoisting chain wheel 40, the power chain wheel 50 and the brake device 60 are arranged in the shell; the gear transmission mechanism comprises a primary gear set, a secondary gear set and a tertiary gear set which are sequentially arranged from the outer end to the inner side of the long shaft 10; the primary gear set comprises a long shaft gear 11 fixedly connected to the outer end of the long shaft 10 and two primary gears 12 meshed with the long shaft gear 11; the secondary gear set comprises two intermediate gears 13 and two sheet gears 14 meshed with the intermediate gears 13, and the intermediate gears 13 are fixedly connected with the primary gear 12; the three-stage gear set comprises a flower hole gear 16 and two short shaft gears 15 meshed with the flower hole gear 16, the flower hole gear 16 is in running fit with the long shaft 10, the two short shaft gears 15 are respectively and fixedly connected with the two sheet gears 14, and the flower hole gear 16 is fixedly connected with the hoisting chain wheel 40.

Referring to fig. 1, the housing includes a left end cover 101, a cover 102 and a right end cover 103, when assembled, the long shaft 10, the gear transmission mechanism, the hoisting sprocket 40, the power sprocket 50 and the brake device 60 are all installed in the cover 102, and then the left end cover 101 and the right end cover 103 are respectively covered at two ends of the cover 102 by fasteners such as screws, and the like, wherein the structures of the housing, the hoisting sprocket 40, the power sprocket 50 and the like are the same as those in the applicant's applied patent (CN 212151445U), and are not described again in this embodiment.

Referring to fig. 2 and 3, the long shaft 10 is transversely disposed in the middle of the housing, the gear transmission mechanism, the lifting sprocket 40, the braking device 60 and the power sprocket 50 are sequentially disposed on the long shaft 10 from left to right, specifically, the middle of the lifting sprocket 40 extends to the left and right to form shaft-like mounting structures, mounting shaft holes are disposed in the housing at positions corresponding to the lifting sprocket 40, the shaft-like mounting structures at two ends of the lifting sprocket 40 are rotatably matched with the mounting shaft holes in a shaft hole matching manner, and shaft sleeves are disposed between the shaft-like mounting structures and the housing, so that the lifting sprocket 40 is stably mounted on the housing.

The long shaft 10 is rotatably fitted in an inner hole of the hoisting sprocket 40, and the inner hole of the hoisting sprocket 40 provides a supporting function for the long shaft 10, so that the long shaft 10 is positioned in the radial direction. In the axial direction, the left end of the long shaft 10 is rotatably matched with a positioning connecting plate 17 in a shaft hole matching mode, referring to fig. 6, an installation groove 18 is formed in the inner side of the left end cover 101, and the positioning connecting plate 17 is embedded into the installation groove 18 to realize the limiting of the left end of the long shaft 10. Referring to fig. 2, the long axis gear 11 is integrally formed at the left end of the long axis 10, a first wall plate 20 is fixedly connected to the left side in the housing through a screw, and the first wall plate 20 is located at the right side of the long axis gear 11 and abuts against the right side of the long axis gear 11, so that the long axis 10 is positioned in the axial direction through the first wall plate 20 and the positioning connection plate 17.

Referring to fig. 3 and 4, two primary gears 12 are rotatably installed on the left side surface of the first wall plate 20, and both the primary gears 12 are engaged with the long axis gear 11. In some embodiments, two primary gears 12 are respectively located at the diagonal positions of the lower left corner and the upper right corner of the first wall plate 20, so as to reduce the occupied space of the primary gears 12 in height and width, make the internal structure of the device more compact, and reduce the volume of the device.

In some embodiments, the two primary gears 12 are in running fit with the positioning connecting plate 17, so that the limiting of the primary gears 12 is realized, and the running stability of the primary gears is ensured.

The centers of the two first-level gears 12 are fixedly connected with central shafts, the central shafts penetrate through the first wall plate 20 and extend out to the right side of the first wall plate 20, the two middle gears 13 are fixedly connected with the two central shafts in a coaxial mode respectively, and referring to fig. 5, the positions of the two central gears and the positions of the first-level gears 12 are opposite to each other and are located on the upper left portion and the lower right portion of the first wall plate 20 respectively.

Referring to fig. 3 and 5, two plate gears 14 are rotatably mounted on the right side surface of the first wall plate 20 by means of shaft hole fitting, the two plate gears 14 are respectively located at the left and right sides of the long shaft 10 and respectively engaged with the two intermediate gears 13, and the two stub gears 15 are respectively coaxially fixed at the right ends of the two plate gears 14.

Wherein, the flower hole gear 16 is located on the right side of the sheet gear 14 and is in running fit with the long shaft 10, specifically, referring to fig. 2, the shaft-like mounting structure extending leftward from the hoisting sprocket 40 is a spline housing, the surface of the shaft-like mounting structure is provided with an external spline, the inner hole of the flower hole gear 16 is provided with an internal spline and is sleeved on the spline housing, and the rotation limit between the flower hole gear 16 and the spline housing is realized through the spline.

Referring to fig. 2 and 3, a second wall plate 30 is further arranged in the housing, the second wall plate 30 is located on the right side of the spline hole gear 16, specifically, a stepped groove is formed in the position, right opposite to the second wall plate 30, of the housing, the second wall plate 30 is embedded into the stepped groove from left to right, the second wall plate 30 is located, a through hole is formed in the middle of the second wall plate 30, the through hole is sleeved on the shaft mounting structure at the left end of the hoisting sprocket 40, and a shaft sleeve is further arranged in the through hole. The right ends of the intermediate gear 13 and the short shaft gear 15 are in running fit with the second wall plate 30 in a shaft hole matching mode.

Referring to fig. 2 and 7, the braking device 60 is disposed between the power sprocket 50 and the lifting sprocket 40, specifically, the braking device 60 includes a brake seat 604, two friction plates 603, a ratchet 602, a pawl spring and a pawl 601, the two friction plates 603 are respectively a friction plate i and a friction plate ii, the brake seat 604 includes a seat cover and a baffle plate integrally formed on the left side of the seat cover, the seat cover is fixedly sleeved on the long shaft 10 by means of screw fixation or spline fit, the friction plate i, the ratchet 602 and the friction plate ii are sequentially sleeved on the seat cover, and the friction plate i, the ratchet 602 and the friction plate ii are clamped between the brake seat 604 and the power sprocket 50, referring to fig. 3, the pawl 601 is hinged inside the housing by a pin shaft and the pawl spring 601 (not shown in the figure), and the two pawls 601 are respectively clamped on the ratchet 602.

The power sprocket 50 is located on the right side of the braking device 60 and fixedly sleeved on the long shaft 10 in a screw fixing or spline fitting mode, and a locking nut is fixedly connected to the right end of the long shaft 10 through threads and locks the power sprocket 50 on the long shaft 10.

Based on the scheme, the principle of the utility model is that the power sprocket 50 is the input end of the device, when in use, the chain is pulled by hand power or electric drive to drive the power sprocket 50 to rotate, the power sprocket 50 rotates to drive the long shaft 10 to rotate, the long shaft 10 transmits power to the gear transmission mechanism, so that the long shaft gear 11 rotates along with the long shaft 10, the long shaft gear 11 drives two primary gears 12 engaged with the long shaft gear to rotate, the primary gears 12 rotate to drive the sheet gears 14 to rotate through the intermediate gears 13, the sheet gears 14 rotate to drive the perforated gears 16 to rotate through the short shaft gears 15, and the perforated gears 16 are fixedly connected with the hoisting sprocket 40, so that the hoisting sprocket 40 is driven to rotate by the rotation of the perforated gears 16, and the hoisting chain 80 is lifted.

This scheme realizes tertiary deceleration through one-level gear train, secondary gear train and tertiary gear train, compares with traditional secondary transmission, and this transmission provides bigger tooth ratio, can reduce hand power or electric drive power when promoting the heavy object, and is light and handy laborsaving during the use, improves hoisting efficiency, reduces staff's intensity of labour. Moreover, the whole structure of the device is reasonable in design, the length of the long shaft 10 in the axial direction is slightly increased, the width in the radial direction is not changed, the size of the whole device is not changed greatly, the structure is compact, a larger reduction ratio is obtained in a small space, the appearance of the transmission device can be made small, and a primary transmission structure is added, so that the reduction effect is better.

Referring to fig. 8, the present embodiment further discloses a hoist, which includes the above-mentioned reduction gear, a hoist chain 80 and a power chain 70, the hoist chain 80 is engaged with the hoist sprocket 40, the power chain 70 is engaged with the power sprocket 50, and the driving force of the power chain 70 may be manual or electric.

Speed reduction gearing's shell top is equipped with couple 90, and couple 91 under the lower extreme fixedly connected with of jack-up chain 80, and couple 91 is for machinery from locking-type couple down, and it is current structure, no longer gives unnecessary details in this embodiment, compares with the couple of traditional jack-up block, and couple anticreep effect in this scheme is better, and the locking mode is also more stable.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. Speed reduction transmission, its characterized in that: the brake device comprises a shell, a long shaft (10), a gear transmission mechanism, a hoisting chain wheel (40), a power chain wheel (50) and a brake device (60) for braking the long shaft (10) in a one-way mode, wherein the long shaft (10), the gear transmission mechanism, the hoisting chain wheel (40), the power chain wheel (50) and the brake device (60) are arranged in the shell, the hoisting chain wheel (40) is sleeved on the long shaft (10) and is in running fit with the long shaft (10), and the power chain wheel (50) is fixedly connected with the long shaft (10);

the gear transmission mechanism comprises a primary gear set, a secondary gear set and a tertiary gear set which are sequentially arranged from the outer end to the inner side of the long shaft (10);

the primary gear set comprises a long shaft gear (11) fixedly connected to the outer end of the long shaft (10) and two primary gears (12) meshed with the long shaft gear (11); the secondary gear set comprises two intermediate gears (13) and two sheet gears (14) meshed with the intermediate gears (13), and the intermediate gears (13) are fixedly connected with the primary gear (12); the three-stage gear set comprises a flower hole gear (16) and two short shaft gears (15) meshed with the flower hole gear (16), the flower hole gear (16) is in running fit with the long shaft (10), the two short shaft gears (15) are fixedly connected with two sheet gears (14) respectively, and the flower hole gear (16) is fixedly connected with a hoisting chain wheel (40).

2. A creeper gear arrangement as claimed in claim 1, wherein: first wallboard (20) of fixedly connected with and second wallboard (30) in the shell, first wallboard (20) are located between one-level gear train and the second gear train, one-level gear (12) and piece gear (14) all with first wallboard (20) normal running fit, second wallboard (30) are located between tertiary gear train and jack-up sprocket (40), stub shaft gear (15) and second wallboard (30) normal running fit.

3. A creeper gear arrangement as claimed in claim 2, wherein: the two primary gears (12) are respectively positioned at two opposite angles of the first wall plate (20).

4. A creeper gear arrangement as claimed in claim 2 or claim 3, wherein: the shell comprises a cover body (102) and a left end cover (101) and a right end cover (103) which are fixedly connected to the two ends of the cover body (102), wherein a mounting groove (18) is formed in the inner side of the left end cover (101), a positioning connecting plate (17) is detachably connected in the mounting groove (18), and a long shaft gear (11) and two first-stage gears (12) are in running fit with the positioning connecting plate (17).

5. A creeper gear arrangement as claimed in claim 1, 2 or 3, wherein: the braking device (60) comprises a brake seat (604), a friction plate I, a ratchet wheel (602), a friction plate II, a pawl (601) spring and a pawl (601) which are fixed in a shell through a pawl (601) pin, the brake seat (604) is fixedly sleeved on the long shaft (10), the friction plate I, the ratchet wheel (602) and the friction plate II are sequentially sleeved on the brake seat (604), the friction plate I, the ratchet wheel (602) and the friction plate II are clamped between the brake seat (604) and the power chain wheel (50), and the pawl (601) is clamped on the ratchet wheel (602).

6. A creeper gear arrangement as claimed in claim 2 or claim 3, wherein: a spline housing is arranged between the flower hole gear (16) and the long shaft (10), the spline housing is formed by a part of the hoisting chain wheel (40) extending to one side of the flower hole gear (16), the spline housing is rotatably sleeved on the long shaft (10), an external spline is arranged on the outline of the spline housing, and an internal spline matched with the spline housing is arranged in an inner hole of the flower hole gear (16).

7. The creeper gear arrangement of claim 6, wherein: the cover body (102) inboard is equipped with the ladder groove, and second wallboard (30) joint is in the ladder inslot, and second wallboard (30) middle part is equipped with the through-hole, and normal running fit has the axle sleeve between through-hole and the spline housing.

8. A hoist block is characterized in that: comprising a reduction drive according to any one of claims 1-7, a hoisting chain (80) and a power chain (70), the hoisting chain (80) meshing with the hoisting sprocket (40) and the power chain (70) meshing with the power sprocket (50).

9. The hoist of claim 8, wherein: the lower end of the hoisting chain (80) is fixedly connected with a lower hook (91).

10. The hoist of claim 9, wherein: the lower hook (91) is a mechanical self-locking hook.