阅读说明：本技术 一种两级蜗轮蜗杆斜齿轮传动减速机 (Two-stage worm gear and helical gear transmission speed reducer ) 是由 易淑强 于 2019-01-14 设计创作，主要内容包括：本发明涉及一种两级蜗轮蜗杆斜齿轮传动减速机,该减速机采用两级传动方式,蜗轮蜗杆位于高速级,斜齿轮位于低速级。所述的两级蜗轮蜗杆斜齿轮传动减速机包括箱体,设置在箱体内的输出轴、蜗轮、蜗杆,蜗轮中部设有蜗轮轴,主轴及蜗轮轴上套设齿轮并相互连接,蜗杆ZC齿形。与现有技术相比,本发明可以提高传动效率,同时还能满足可以输出较大的扭矩,减速机整体的承载能力得到大大提升,主要可以用于重型扶梯(公交梯)的主驱动。(The invention relates to a two-stage worm gear and helical gear transmission speed reducer, which adopts a two-stage transmission mode, wherein a worm gear is positioned at a high-speed stage, and a helical gear is positioned at a low-speed stage. The two-stage worm gear, worm and helical gear transmission speed reducer comprises a box body, an output shaft, a worm gear and a worm, wherein the output shaft, the worm gear and the worm are arranged in the box body, a worm gear shaft is arranged in the middle of the worm gear, gears are sleeved on a main shaft and the worm gear shaft and are connected with each other, and the worm ZC is in the shape of a tooth. Compared with the prior art, the speed reducer can improve the transmission efficiency, can output larger torque, greatly improves the integral bearing capacity of the speed reducer, and is mainly used for main driving of heavy escalators (public transport elevators).)

1. A two-stage worm gear and helical gear transmission speed reducer is characterized by comprising

The box body is provided with a plurality of air inlets,

an output shaft, a worm wheel, a worm and a helical gear which are arranged in the box body,

the middle part of the worm wheel is provided with a worm wheel shaft, the main shaft and the worm wheel shaft are sleeved with gears and are connected with each other,

the worm adopts a ZC tooth form,

the high-speed stage adopts worm gear transmission, and the low-speed stage adopts helical gear transmission.

2. The two-stage worm gear and helical gear transmission speed reducer according to claim 1, wherein the high-speed stage adopts a 4-head worm or a 5-head worm, the transmission ratio is 4: 1-8: 1, the low-speed stage adopts a helical gear with a linear tooth or curved tooth structure, and the transmission ratio is 3.5: 1-5.5: 1.

3. The two-stage worm-gear helical gear transmission speed reducer according to claim 1, wherein a large helical gear is sleeved on the main shaft, a small helical gear is sleeved on the worm gear shaft, and the two helical gears are arranged on parallel shafts and meshed with each other.

4. The two-stage worm gear and helical gear transmission speed reducer according to claim 3, wherein bearings are sleeved at the positions where the main shaft and the worm gear shaft contact with the inner side of the box body.

5. The two-stage worm gear helical gear transmission speed reducer according to claim 4, wherein one end of the main shaft is sleeved with two tapered roller bearings or angular contact ball bearings of the same type, and the other end is sleeved with a double-row self-aligning ball bearing or double-row self-aligning roller bearing.

6. The two-stage worm gear and helical gear transmission speed reducer according to claim 5, wherein bearing sleeves are arranged on the outer sides of the two same-type tapered roller bearings or the two same-type tapered roller bearings.

7. The two-stage worm gear and helical gear transmission speed reducer according to claim 6, wherein a main shaft spacer sleeve is arranged between the two conical roller bearings or angular contact ball bearings of the same type and the large helical gear, so that the axis positioning of the large helical gear and the bearings is realized.

8. The two-stage worm gear and helical gear transmission speed reducer according to claim 1, wherein bearings are sleeved on the upper end and the lower end of the worm, and the bearings are angular contact ball bearings with large contact angles or tapered roller bearings with large contact angles.

9. The two-stage worm gear and helical gear transmission speed reducer according to claim 1, wherein heat dissipation ribs are arranged on both sides of the box body, and the heat dissipation ribs and the box body are cast together and formed in one step; the width of the heat dissipation rib is 3-15 mm, and the die draft angle is 1-5 degrees.

10. The two-stage worm gear and helical gear transmission speed reducer according to claim 9, wherein the heat dissipation ribs are parallel to each other and are uniformly arranged on two sides of the box body.

Technical Field

The invention relates to a transmission device for reducing speed and increasing torque in commerce or industry, in particular to a two-stage worm gear and helical gear transmission speed reducer.

Background

The reducer has wide application range, can be seen everywhere in industry and daily life, and has a plurality of types, such as: the speed reducer has the advantages of different structures and different performances. The main performance indexes of the speed reducer product comprise transmission ratio, transmission efficiency, transmission torque, transmission stability, noise and the like, and the speed reducers with different performances can be selected and used in different occasions and environments as required. However, it is often difficult to select a speed reducer with good comprehensive performance, and the speed reducer in the current market cannot meet the requirement, and needs to be further improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a two-stage worm gear and helical gear transmission speed reducer.

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

a two-stage worm gear and helical gear transmission speed reducer comprises

The box body is provided with a plurality of air inlets,

an output shaft, a worm wheel, a worm and a helical gear which are arranged in the box body,

the middle part of the worm wheel is provided with a worm wheel shaft, the main shaft and the worm wheel shaft are sleeved with gears and are connected with each other,

the worm adopts a ZC tooth form,

the high-speed stage adopts worm gear transmission, and the low-speed stage adopts helical gear transmission.

The two-stage worm gear and helical gear transmission speed reducer adopts worm gear and helical gear transmission at a high speed stage and helical gear transmission at a low speed stage. The high-speed stage adopts 4-head or 5-head worms with the transmission ratio of 4: 1-8: 1, and the low-speed stage adopts linear teeth or curved teeth helical gears with the transmission ratio of 3.5: 1-5.5: 1.

The main shaft is sleeved with a large helical gear, the worm wheel shaft is sleeved with a small helical gear, and the two helical gears are installed and then mutually meshed and connected on the parallel shaft.

And bearings are sleeved at the positions where the main shaft and the worm wheel shaft are contacted with the inner side of the box body.

One end of the main shaft is sleeved with two tapered roller bearings or angular contact ball bearings of the same type, and the other end of the main shaft is sleeved with a double-row self-aligning ball bearing or a double-row self-aligning roller bearing.

And bearing sleeves are arranged on the outer sides of the two tapered roller bearings or the angular contact ball bearings of the same type.

And a main shaft spacing sleeve is arranged between the two conical roller bearings or the angular contact ball bearings with the same type and the large helical gear, so that the axis positioning of the large helical gear and the bearings is realized.

The upper end and the lower end of the worm are both sleeved with bearings, and the bearings can be angular contact ball bearings with large contact angles or tapered roller bearings with large contact angles.

The two sides of the box body are respectively provided with a heat dissipation rib, and the heat dissipation ribs and the box body are cast together and formed in one step; the width of the heat dissipation rib is 3-15 mm, and the die draft angle is 1-5 degrees.

The heat dissipation ribs are parallel to each other and are uniformly arranged on two sides of the box body.

The both sides of box all are equipped with the heat dissipation muscle, are parallel to each other and evenly arrange in the both sides of 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.

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

1. the worm adopts a ZC tooth shape, so that the transmission efficiency can be improved, and the requirement of outputting larger torque can be met;

2. the strength of the worm wheel is the key for restricting the overall bearing capacity of the speed reducer; the worm gear and worm transmission is placed at a high-speed stage, the high-speed stage adopts 4-head or 5-head worms, and the transmission ratio is 4: 1-8: 1, so that the torque acting on the worm gear is not high; the low-speed stage adopts bevel gear transmission, the transmission ratio is 3.5: 1-5.5: 1, and the advantage of high bearing capacity of the bevel gear is just exerted; therefore, the bearing capacity of the two-stage worm gear, worm and helical gear transmission speed reducer is greatly improved;

3. the worm gear and worm transmission is sliding transmission, has the advantages of smooth transmission and no noise, and can play the advantages when being arranged at a high-speed level; the arrangement mode overcomes the defects of worm gear transmission and exerts the respective advantages of the worm gear transmission and the gear transmission; meanwhile, the worm adopts 4-head or 5-head worm, so that the worm transmission efficiency is improved, and the single-stage worm transmission efficiency can reach 95% -96%; therefore, the two-stage worm gear and helical gear transmission speed reducer has the advantages of high efficiency and low noise;

4. the space volume of the box body is large, so that a raised structure is formed in the area of the box body which does not interfere with parts, particularly the upward bottom plate, and the lower part of the raised structure is hollow, so that metal materials are saved, the capacity of lubricating oil is reduced, the liquid level of the lubricating oil can be raised under the condition of the same lubricating oil quantity, parts needing to be lubricated, such as a worm wheel, a worm, a bearing, a helical gear and the like, can be soaked, and the optimized design of the box body with the raised structure is adopted, so that the gear oil is saved and the lubricating effect is achieved.

5. Through install the heat dissipation muscle additional in box both sides, can play fine radiating effect to the appearance is exquisite pleasing to the eye.

Drawings

FIG. 1 is a schematic diagram of a back structure of a two-stage transmission reducer;

FIG. 2 is a schematic front view of a two-stage transmission reducer;

FIG. 3 is a schematic diagram of a cross-sectional structure of a two-stage transmission reducer;

fig. 4 is a schematic longitudinal sectional view of the two-stage transmission reducer.

In the figure, 1-box body, 2-heat dissipation rib, 3-main shaft spacing sleeve, 4-main shaft, 5-core adjusting bearing, 6-tapered roller bearing, 7-bearing sleeve, 8-big helical gear, 9-worm gear upper end bearing, 10-small helical gear, 11-worm gear, 12-worm gear shaft spacing sleeve, 13-worm gear lower end bearing, 14-flange end cover, 15-gland, 16-worm, 17-worm upper end bearing and 18-worm lower end bearing.

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.