CN114131550A

CN114131550A - Torque multiplication sleeve

Info

Publication number: CN114131550A
Application number: CN202111395394.1A
Authority: CN
Inventors: 周顺新; 王虬; 魏业文
Original assignee: Hubei Chuangquan Electric Co ltd
Current assignee: Hubei Chuangquan Electric Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-03-04

Abstract

The utility model provides a moment of torsion multiplication sleeve, includes worm input shaft, worm wheel and sleeve, and worm input shaft, worm wheel, sleeve rotate with the shell body and be connected, and worm input shaft and worm wheel meshing transmission, the worm wheel center are equipped with the worm-gear axle, and worm-gear axle lower extreme is equipped with the transmission gear, and transmission gear drive sleeve rotates on the shell body, through the rotation at the worm input shaft, through the speed reduction increase moment between worm wheel and worm and transmission gear and the sleeve, realizes that multistage moment increases progressively. After carrying out the moment multiplication through the worm gear structure with the input shaft earlier, set up multi-stage gear drive in the below of worm wheel pivot, make the gear in the sleeve outside and worm wheel pivot below gear mesh transmission, and transmit through two gears, utilize the big characteristics of large-scale screw or nut size, sleeve outside gear diameter is greater than worm wheel pivot below gear greatly, form great drive ratio, make total moment of torsion multiplication number big, conveniently carry out the fastening operation of large-scale screw.

Description

Torque multiplication sleeve

Technical Field

The invention relates to the field of disassembling tools, in particular to a torque multiplication sleeve.

Background

In the building industry and the manufacturing industry, screw fastening is the most used fixed connection mode in fixed connection, and object parts are fastened step by utilizing the physics and the mathematical principle of the inclined circular rotation and the friction of an object, and the screw fastening is simple and practical in structure and convenient for mass production and is widely introduced.

In the installation of large steel components such as power transmission towers, signal towers, wind power piles and the like, because the large scale and the high precision of the installation are needed, embedded parts with threaded holes are poured in the foundation according to standards in advance in the fixation of the bottom foundation, and then are connected with the threads in the embedded parts through screws, the installation field of the large equipment is suitable for the installation field of the large equipment due to the precision and the quick installation performance of the threaded connection, but because the large equipment has high weight, the fastening screws of the base are usually large, the specification of the screws is usually more than M64, very large pre-tightening torque is needed, a compressor with a wind cannon and a sleeve are generally adopted to ensure the tightening in the installation, the large transportation is responsible for the equipment transportation, but after the installation, the cost of specially transporting the compressor and the wind cannon for the fastening screws is unacceptable in the subsequent overhaul and maintenance process, however, the manual tightening obviously cannot meet the requirement of the pre-tightening torque, and the structure is generally adopted to increase the torque, such as increasing the length of the wrench, but the pre-tightening torque of the screw of M64 is 19353N M, and if the length of the wrench is increased, the manual tightening is obviously insufficient.

The prior art also has a device for multiplying the moment, for example, australian patent document AU2018361223 adopts a planetary gear to multiply the moment, but the planetary gear around the input shaft in the planetary gear expands the size of the device greatly along the axial direction to the periphery, the space is not enough to place the multiplication device with enough moment when fastening, and the multiplication device designed by the current space can only provide about 25 times of moment multiplication, the manpower needs to provide 19353/25= 774.12N · m moment, and obviously the manpower cannot achieve the moment.

Disclosure of Invention

The invention aims to provide a torque multiplication sleeve, which can increase enough torque multiplication for the sleeve and reduce occupied space at the same time.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a moment of torsion multiplication sleeve, includes worm input shaft, worm wheel and sleeve, and worm input shaft, worm wheel, sleeve rotate with the shell body and be connected, and worm input shaft and worm wheel meshing transmission, the worm wheel center are equipped with the worm-gear axle, and worm-gear axle lower extreme is equipped with the transmission gear, and transmission gear drive sleeve rotates on the shell body, through the rotation at the worm input shaft, through the speed reduction increase moment between worm wheel and worm and transmission gear and the sleeve, realizes that multistage moment increases progressively.

The sleeve comprises an external sleeve gear and an internal sleeve groove, an intermediate gear is arranged between the transmission gear and the external sleeve gear, the transmission gear is in meshing transmission with the intermediate gear, and the intermediate gear is in meshing transmission with the external sleeve gear.

The two intermediate gears are respectively arranged on two sides of the transmission gear and are rotationally connected with the outer shell.

The lower end of the worm wheel shaft penetrates out of the worm wheel, the transmission gear is positioned on a shaft body on the lower side of the worm wheel shaft, and the upper end and the lower end of the worm wheel shaft are respectively connected with the top end and the bottom end of the outer shell in a rotating mode.

The sleeve is located below the worm wheel, the shell is provided with a through hole above the sleeve groove, the through hole is used for the screw to penetrate out, and the sleeve groove is used for placing a nut.

One end or two ends of the worm input shaft penetrate out of the outer shell, and a groove for accommodating a wrench head on the wrench is formed in the end part of the shaft body penetrating out of the worm input shaft.

The sleeve groove is a hexagonal groove and is used for placing an outer hexagonal nut or a screw.

According to the torque multiplication sleeve provided by the invention, after the input shaft is subjected to torque multiplication through the worm gear structure, the multistage gear transmission is arranged below the worm gear rotating shaft, so that the gear on the outer side of the sleeve is in meshing transmission with the gear below the worm gear rotating shaft and is transmitted through the two gears, and by utilizing the characteristic that the size of a large screw or a nut is large, the diameter of the gear on the outer side of the sleeve is greatly larger than that of the gear below the worm gear rotating shaft, so that a large transmission ratio is formed, the total torque multiplication number is large, and the fastening operation of the large screw is convenient.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of the torque multiplier assembly of the present invention;

FIG. 2 is a side view of the torque multiplier device of the present invention;

FIG. 3 is a front view of the torque multiplier device of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a drive schematic of the torque multiplier device;

FIG. 7 is a drive schematic of the torque multiplier device two;

FIG. 8 is a first schematic diagram of an embodiment of a torque multiplier device;

FIG. 9 is a schematic diagram of a second embodiment of a torque multiplier device.

Wherein: the worm gear comprises an outer shell 1, a worm input shaft 2, a sleeve 3, an external sleeve gear 31, a sleeve groove 32, a worm wheel 4, a worm wheel shaft 5, a transmission gear 6, an intermediate gear 7 and a through hole 8.

Detailed Description

The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.

As shown in fig. 1-4, a torque multiplication sleeve comprises a worm input shaft 2, a worm wheel 4 and a sleeve 3, the worm input shaft 2, the worm wheel 4 and the sleeve 3 are rotatably connected with an outer shell 1, the worm input shaft 2 and the worm wheel 4 are in meshed transmission, the worm wheel 4 is centrally provided with a worm wheel shaft 5, the lower end of the worm wheel shaft 5 is provided with a transmission gear 6, the transmission gear 6 drives the sleeve 3 to rotate on the outer shell 1, through the rotation of the worm input shaft 2 and the speed reduction and torque increase between the worm gear and the transmission gear 6 and the sleeve 3, the multistage torque increment is realized, because the external dimension of the large screw or nut is large, the gear outside the sleeve 3 is greatly larger than the transmission gear 6, the transmission ratio is large, the transmission ratio of the worm gear and the worm is also large, so that the device can achieve the torque multiplication effect of more than 100 times, and is suitable for the fastening operation of large nuts or screws.

As shown in fig. 4, the sleeve 3 includes an external sleeve gear 31 and an internal sleeve groove 32, an intermediate gear 7 is disposed between the transmission gear 6 and the external sleeve gear 31, the transmission gear 6 is in meshing transmission with the intermediate gear 7, the intermediate gear 7 is in meshing transmission with the external sleeve gear 31, the external diameter of the intermediate gear 7 is larger than that of the transmission gear 6, the external diameter of the external sleeve gear 31 is greatly larger than that of the intermediate gear 7, so that the multiplication effect is greatly increased after three stages of torque multiplication from the worm input shaft 2.

As shown in fig. 5 and 7, the two intermediate gears 7 are respectively arranged on both sides of the transmission gear 6 and are rotationally connected with the outer shell 1, the two intermediate gears 7 are meshed with the transmission gear 6 and the sleeve external gear 31, and the two intermediate gears 7 are meshed with the transmission gear 6 while the transmission ratio is increased at two poles, so that the backlash of gear transmission can be eliminated, and the transmission rigidity of the device can be increased.

As shown in fig. 4, the lower end of the worm wheel shaft 5 penetrates through the worm wheel 4, the transmission gear 6 is located on a shaft body at the lower side of the worm wheel shaft 5, the upper end and the lower end of the worm wheel shaft 5 are respectively rotatably connected with the top end and the bottom end of the outer shell 1, and the lower end of the worm wheel shaft 5 extends out to enable the transmission part of the sleeve 3 and the worm wheel shaft 5 to be located below the worm wheel 4, so that the distance between the rotating shafts between the worm wheel shaft 5 and the sleeve 3 is reduced, and the device structure is more compact.

As shown in fig. 4 and 6, the sleeve 3 is positioned below the worm wheel 4, the housing is provided with a through hole 8 above the sleeve groove 32, the through hole 8 is used for the screw to pass through, and the sleeve groove 32 is used for placing the nut.

As shown in fig. 3, one end or both ends of the worm input shaft 2 penetrate out of the outer shell 1, and a groove for accommodating a wrench head of a wrench is formed at the end of the penetrating part of the shaft body.

The sleeve groove 32 is a hexagonal groove for receiving an external hexagonal nut or screw.

As shown in fig. 6 and 7, the side and bottom transmission diagram of the device is shown, after the ratchet wrench is connected with the worm input shaft 2, the worm gear 4 can be driven to rotate by rotating the ratchet wrench, at the moment, the torque multiplication ratio is the transmission ratio of the worm gear, the worm gear 4 drives the transmission gear 6 below the transmission gear 4 to synchronously rotate, the transmission gear 6 drives the intermediate gears 7 at two sides to rotate, the intermediate gears 7 drive the sleeve outer gear 31 to rotate, at the moment, two-stage torque multiplication is carried out, the sleeve groove 32 drives the inner nut or screw to rotate to realize fastening, the transmission gears 6, the intermediate gears 7 and the sleeve 3 are sequentially distributed from right to left in transmission, and the space below the worm gear 4 is fully utilized, so that the device is compact in structure, and the occupied space is greatly reduced.

The following takes as an example the screw tightening of M64:

the pretension torque of the screw M64 is 19353N · M, as can be seen from fig. 8 and 9, the overall device has dimensions 378.7 × 202 × 152 in mm, the length is 388.7 in relation to the screw M64, but the sleeve 3 is located at the top end of the length, the space occupied at the upper part of the sleeve 3 is small, the device is distributed in a long and narrow configuration, it is possible to cope with the situation where there is only one opening around the screw, the worm gear ratio is i1= Z2/Z1=63/2=31.5, the transmission gear ratio i2= Z4/Z3=32/25=1.28, the intermediate gear 7 transmission ratio i3= Z5/Z4=80/32=2.5, the total transmission ratio i = i1 i2 i3=31.5 =2.5 =1.28 =100.8, the practical ratchet plate, the torque rating 200 × 201608 × 1938 × 2016053 Nm > 100.53 Nm.

Claims

1. The utility model provides a torque multiplication sleeve, a serial communication port, including worm input shaft (2), worm wheel (4) and sleeve (3), worm input shaft (2), worm wheel (4), sleeve (3) are rotated with shell body (1) and are connected, worm input shaft (2) and worm wheel (4) meshing transmission, worm wheel (4) center is equipped with worm wheel axle (5), worm wheel axle (5) lower extreme is equipped with transmission gear (6), transmission gear (6) drive sleeve (3) rotate on shell body (1), through the rotation at worm input shaft (2), through the reduction increase torque between worm wheel and worm and transmission gear (6) and sleeve (3), realize that multistage moment increases progressively.

2. The torque multiplication sleeve according to claim 1, wherein the sleeve (3) comprises an external sleeve gear (31) and an internal sleeve groove (32), an intermediate gear (7) is arranged between the transmission gear (6) and the external sleeve gear (31), the transmission gear (6) is in meshing transmission with the intermediate gear (7), and the intermediate gear (7) is in meshing transmission with the external sleeve gear (31).

3. A torque multiplication sleeve according to claim 2, wherein two intermediate gears (7) are provided, one on each side of the transfer gear (6) and rotatably connected to the outer housing (1).

4. The torque multiplication sleeve according to claim 2, wherein the lower end of the worm gear shaft (5) penetrates through the worm gear (4), the transmission gear (6) is located on a shaft body at the lower side of the worm gear shaft (5), and the upper end and the lower end of the worm gear shaft (5) are respectively rotatably connected with the top end and the bottom end of the outer shell (1).

5. A torque multiplication sleeve according to claim 4, wherein the sleeve (3) is located below the worm wheel (4), the housing is provided with a through hole (8) above the sleeve groove (32), the through hole (8) is used for the screw to pass through, and the sleeve groove (32) is used for placing the nut.

6. A torque multiplication sleeve according to claim 1, wherein one or both ends of the worm input shaft (2) extend through the outer housing (1), and the end of the extended shaft body is provided with a recess for receiving a wrench head of a wrench.

7. A torque multiplication sleeve according to claim 2, wherein the sleeve slot (32) is a hexagonal recess for receiving an external hexagonal nut or screw.