CN111434947A

CN111434947A - High-efficient worm gear speed reducer machine

Info

Publication number: CN111434947A
Application number: CN201910033304.0A
Authority: CN
Inventors: 易淑强
Original assignee: Shanghai Longyu Elevator Accessories Co ltd
Current assignee: Shanghai Longyu Elevator Accessories Co ltd
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2020-07-21

Abstract

The invention relates to a high-efficiency worm gear speed reducer which comprises a box body, wherein heat dissipation ribs are arranged on two sides of the box body, a worm gear and a worm are arranged in the box body and are mutually matched and connected, an output shaft is arranged in the middle of the worm gear, the upper end of the worm is fixedly connected to the box body through a gland, and the lower end of the worm is arranged on a bottom plate of the box body through a bearing. Compared with the prior art, the cooling ribs are additionally arranged on the two sides of the box body, so that a good cooling effect can be achieved, the bearings at the upper ends of the worms are in an oil bath mode, and the bearings at the lower ends of the worms are completely immersed in lubricating oil, so that the service lives of the bearings can be greatly prolonged, the working temperature of the speed reducer is better reduced, and the oil leakage phenomenon of the speed reducer is prevented. The speed reducer has the characteristics of at least 70000 hours of service life and more than 85% of efficiency.

Description

High-efficient worm gear speed reducer machine

Technical Field

The invention relates to a speed reduction and force increase mechanism in civil or industrial production in the field of mechanical engineering, in particular to a high-efficiency worm and gear speed reducer.

Background

The speed reducer is an independent component consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell, is often used as a speed reduction and force increasing transmission device between a power machine and a working machine, plays a role in matching rotating speed and transmitting amplified torque between the power machine and the working machine or an execution mechanism, and is widely applied to modern machinery.

The speed reducer can be because the flow of friction and lubricating oil produces energy loss at the in-process of work, the most energy of loss changes into heat, however the radiating effect of general speed reducer is relatively poor, lead to the heat that produces in the speed reducer can not effectual distribute away, make the heat pile up and arouse speed reducer bulk temperature rising in the speed reducer, thereby can cause the influence and destroy the lubrication to the inside part operation of speed reducer, can reduce the life of speed reducer even, so provide a speed reducer convenient to heat dissipation and solve above-mentioned problem.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a high-efficiency worm gear speed reducer with improved heat dissipation effect.

The purpose of the invention can be realized by the following technical scheme:

a high-efficiency worm gear speed reducer comprises

A box body, heat dissipation ribs are arranged on two sides of the box body,

a worm wheel and a worm which are arranged in the box body and are mutually matched and connected,

an output shaft is arranged in the middle of the worm wheel, the upper end of the worm is fixedly connected to the box body through a gland, and the lower end of the worm is arranged on the bottom plate through a bearing.

The efficiency of the worm gear speed reducer is more than 85%.

The heat dissipation ribs are uniformly arranged on two sides of the box body in a mutually parallel mode, and the heat dissipation ribs and the box body are cast together and have a pattern drawing inclination of 1-3 degrees; the width of the heat dissipation ribs is between 2mm and 10 mm.

And bearings are arranged at the upper end and the lower end of the worm.

The bearing can be a tapered roller bearing with a larger contact angle or an angular contact ball bearing with a larger contact angle.

A pair of tapered roller bearings or angular contact ball bearings are positively mounted (installed face to face) at two ends of the worm; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, lubricating oil can rise to the bearing at the upper end through a special structure, and the outer ring of the bearing is 1/3-1/2 wide and is positioned in the oil bath; install worm lower extreme bearing frame edge sets up the channel, has both guaranteed the location of bearing and can make the pollutant that deposits in the bottom of the box flow out the bearing region again.

The worm adopts ZC profile of tooth (circular arc profile of tooth), the circular arc tooth is the tangent transition form of biarc, and the circular arc radius of curvature is between 3 ~ 18 mm.

The worm wheel is processed by a hob which is completely consistent with the worm structure.

The output shaft is provided with bearings capable of bearing large axial force at the contact parts of the output shaft and the two ends of the inner side of the box body, and the bearings can be tapered roller bearings with large contact angles or angular contact ball bearings with large contact angles.

The bearing is embedded in a bearing seat hole on the inner side of the box body, a rib plate for improving the bearing seat hole is arranged outside the bearing seat, and the rib plate can be of a triangular or trapezoidal structure.

The speed reducer has the characteristics of at least 70000 hours of service life and more than 85% of efficiency; the high-efficiency speed reducer can reduce the heat generated in the operation process.

Compared with the prior art, the invention has the following advantages:

1. the worms all adopt ZC tooth shapes, so that the bearing capacity and the transmission efficiency can be improved;

2. the speed reducer has a simple overall structure, the worm wheel machining precision reaches 6 levels, the worm machining precision reaches 4.5 levels, and the transmission efficiency of the whole machine is more than 85% by matching with proper worm surface hardness and preferred worm wheel materials;

3. the radiating ribs are additionally arranged on the two sides of the box body, so that a good radiating effect can be achieved, and the appearance is exquisite and attractive;

4. the bearing at the upper end of the worm adopts an oil bath mode, so that the service life of the bearing can be greatly prolonged, and the working temperature of the speed reducer is better reduced.

Drawings

Fig. 1 is a schematic front structural view of a speed reducer;

FIG. 2 is a schematic diagram of a back structure of the speed reducer;

FIG. 3 is a schematic diagram of a transverse cross-sectional structure of the speed reducer;

fig. 4 is a longitudinal sectional structural schematic diagram of the speed reducer.

In the figure, 1-box, 2-output shaft, 3-first bearing, 4-second bearing, 5-worm wheel, 6-worm, 7-third bearing, 8-fourth bearing, 9-gland and 10-heat dissipation rib.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

The utility model provides a high-efficient worm gear speed reducer machine, includes that both sides are equipped with the box of heat dissipation muscle, sets up worm wheel and the worm that mutually supports in the box and connect, is equipped with the output shaft in the middle of the worm wheel, and the upper end of worm passes through gland fixed connection on the box, and the lower extreme of worm passes through the bearing setting on the bottom plate.

The radiating ribs are parallel to each other and are uniformly arranged on two sides of the box body, the radiating ribs and the box body are cast together during production and processing, the die drawing inclination is 1-3 degrees, and the width of the radiating ribs is between 2-10 mm.

The upper end and the lower end of the worm are provided with bearings, and the mounted bearings can be tapered roller bearings with large contact angles or angular contact ball bearings with large contact angles. A pair of tapered roller bearings or angular contact ball bearings are positively mounted (installed face to face) at two ends of the worm; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, lubricating oil can rise to the bearing at the upper end through a special structure, and the outer ring of the bearing is 1/3-1/2 wide and is positioned in the oil bath; install worm lower extreme bearing frame edge sets up the channel, has both guaranteed the location of bearing and can make the pollutant that deposits in the bottom of the box flow out the bearing region again.

The worm adopts ZC tooth profile (circular arc tooth profile), and the circular arc tooth is a double-circular-arc tangent transition form, and the radius of curvature of the circular arc is 3-18 mm. And the worm gear is machined by a hob which is completely consistent with the structure of the worm.

The bearing which can bear larger axial force is arranged at the contact part of the output shaft and the two ends of the inner side of the box body, and the bearing can be a tapered roller bearing with a larger contact angle or an angular contact ball bearing with a larger contact angle. The installed bearing is embedded in a bearing seat hole on the inner side of the box body, a rib plate for improving the bearing seat hole is arranged outside the bearing seat, and the rib plate can be of a triangular or trapezoidal structure.

The speed reducer disclosed by the invention has the service life of at least 70000 hours, the efficiency can reach more than 85%, and the heat generated in the work process can be reduced as the technical scheme of the arranged heat dissipation ribs, oil bath and the like is adopted.

The following are more detailed embodiments, and the technical solutions and the technical effects obtained by the present invention will be further described by the following embodiments.

Example 1

The utility model provides a high-efficient worm gear speed reducer machine, its structure is shown in fig. 1-4, including box 1, the both sides of this box 1 are equipped with heat dissipation muscle 10, are the both sides of being parallel to each other and evenly arranging at the box, can adopt the structure of strengthening rib, also can adopt the structure of fin formula, perhaps adopt circular-arc wavy structure, can play fine radiating effect to the appearance is exquisite pleasing to the eye, the structure of heat dissipation muscle 10 is shown in fig. 2 in this embodiment, is the strengthening rib structure setting that is parallel to each other in the side of box 1. The worm wheel 5 and the worm 6 are matched and connected in the box body 1, the used worm 6 is in a ZC tooth shape, so that the transmission efficiency can be improved, and meanwhile the requirement for increasing the output torque can be met, the output shaft 2 is arranged in the middle of the worm wheel 5, the inner side end part of the bearing is sleeved with the first bearing 3 and the second bearing 4, in the embodiment, the used first bearing 3 is an NSK-32208J tapered roller bearing, the second bearing 4 is an NSK-32213J tapered roller bearing, the bearings are all embedded in a bearing seat hole in the inner side of the box body, a rib plate for improving the bearing seat hole is arranged outside the bearing seat, and the rib plate can be of a triangular or trapezoidal structure.

The upper end of the worm 6 is fixedly connected to the box body 1 through a gland 9, the upper end and the lower end of the worm 6 are respectively sleeved with a third bearing 7 and a fourth bearing 8, the bearings are NSK-HR32008XJ tapered roller bearings, the third tapered roller bearings 7 sleeved at the upper end of the worm 6 are lubricated by oil bath, before use, the bearings are partially immersed into lubricating oil, and after the bearings operate, the oil is brought into other parts of the bearings to realize lubrication, so that the service life of the bearings can be greatly prolonged on one hand, and the working temperature of the speed reducer is better reduced.

A base of the high-efficiency worm and gear speed reducer is fixedly prevented from being fixed on the ground or a truss through bolt connection or pressing plate fixation, an output shaft of the speed reducer is connected with a small chain wheel through a common flat key, the small chain wheel is connected with a main driving chain wheel of the escalator through a chain, and the speed reducer can drag the steps of the escalator to move up or down after starting to work.

Example 2

In this embodiment, the width of heat dissipation muscle is 2mm, is parallel to each other and evenly arranges in the both sides of box, and the heat dissipation muscle is accomplished with the casting of box together when production and processing to have 1 draft.

Bearings are mounted on both the upper end and the lower end of the worm, and the bearings mounted in this embodiment are tapered roller bearings with large contact angles. A pair of tapered roller bearings are mounted face to face at both ends of the worm. The bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, lubricating oil can rise to the bearing at the upper end through a special structure, and the width of the outer ring of the bearing is 1/3 and is positioned in the oil bath; install at worm lower extreme bearing frame edge and set up the channel, both guaranteed the location of bearing and can make the pollutant that deposits in the bottom of the box flow out the bearing region again.

A worm in the speed reducer is in a ZC tooth shape (circular arc tooth shape), the circular arc tooth is in a double-circular-arc tangent transition form, and the radius of curvature of a circular arc is 3 mm. And during processing, the worm wheel is processed by a hob which is completely consistent with the structure of the worm.

The bearing that can bear great axial force is installed at the both ends contact position of output shaft and box inboard, and what install in this embodiment is the great tapered roller bearing of contact angle, and the bearing of installing inlays and establishes in the bearing housing hole of box inboard, and the bearing housing outside is provided with the triangle-shaped gusset that improves the bearing housing hole. The speed reducer has the service life of at least 70000 hours, the efficiency can reach more than 85 percent, and the heat generated in the work can be reduced as the technical scheme of the arranged heat dissipation ribs, the oil bath and the like.

Example 3

In this embodiment, the width of heat dissipation muscle is 10mm, is parallel to each other and evenly arranges in the both sides of box, and the heat dissipation muscle is accomplished with the casting of box together when processing in production to have 3 draft.

The upper end and the lower end of the worm are both provided with bearings, and the bearings arranged in the embodiment are angular contact ball bearings with large contact angles. A pair of angular contact ball bearings are positively mounted (installed face to face) at both ends of the worm; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, lubricating oil can rise to the bearing at the upper end through a special structure, and the outer ring of the bearing is 1/2 wide and is positioned in the oil bath; install worm lower extreme bearing frame edge sets up the channel, has both guaranteed the location of bearing and can make the pollutant that deposits in the bottom of the box flow out the bearing region again.

A worm in the speed reducer is in a ZC tooth shape (circular arc tooth shape), the circular arc tooth is in a double-circular-arc tangent transition form, and the radius of curvature of a circular arc is 18 mm. And the worm gear is machined by a hob which is completely consistent with the structure of the worm.

The output shaft is mounted with bearings capable of bearing large axial force at the contact part of the output shaft and the two ends of the inner side of the box body, and in the embodiment, the angular contact ball bearings with large contact angles are mounted. The installed bearing is embedded in a bearing seat hole on the inner side of the box body, and a trapezoidal rib plate for improving the bearing seat hole is arranged outside the bearing seat. The speed reducer has the service life of at least 70000 hours, the efficiency can reach more than 85 percent, and the heat generated in the work can be reduced as the technical scheme of the arranged heat dissipation ribs, the oil bath and the like.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. A high-efficiency worm gear speed reducer is characterized by comprising

A box body, heat dissipation ribs are arranged on two sides of the box body,

2. The efficient worm and gear speed reducer as claimed in claim 1, wherein the heat dissipation ribs are arranged on two sides of the box body in parallel and uniformly, the heat dissipation ribs and the box body are cast together, the draft angle is 1-3 degrees, and the width of the heat dissipation ribs is 2-10 mm.

3. The high-efficiency worm gear reducer according to claim 1, wherein bearings are mounted on the upper end and the lower end of the worm.

4. A high efficiency worm gear reducer as set forth in claim 3 wherein said bearings are tapered roller bearings with large contact angles or angular ball bearings with large contact angles.

5. A high-efficiency worm gear and worm reducer as claimed in claim 4, characterized in that a pair of tapered roller bearings or angular contact ball bearings are installed face to face at both ends of the worm; the bearing arranged at the upper end of the worm is lubricated by adopting an oil bath, so that the lubricating oil can rise to reach the bearing at the upper end, and the outer ring of the bearing is 1/3-1/2 wide and is positioned in the oil bath; and a channel is arranged on the edge of a bearing seat arranged at the lower end of the worm.

6. The efficient worm and gear speed reducer as claimed in claim 1, wherein the worm is in the form of a circular-arc tooth profile, the circular-arc tooth profile is in a double-circular-arc tangent transition form, and the radius of curvature of the circular arc is between 3mm and 18 mm.

7. A high efficiency worm gear reducer as set forth in claim 6 wherein said worm gear is machined with a hob that is identical to said worm structure.

8. A high-efficiency worm gear reducer according to claim 1, wherein bearings capable of bearing large axial force are mounted at contact positions of the output shaft and two ends of the inner side of the box body, and the bearings are tapered roller bearings with large contact angles or angular contact ball bearings with large contact angles.

9. The efficient worm and gear speed reducer according to claim 8, wherein the bearing is embedded in a bearing seat hole at the inner side of the box body, a rib plate for improving the bearing seat hole is arranged outside the bearing seat, and the rib plate is of a triangular or trapezoidal structure.