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Large-torque roll-type constant ratio/stepless speed changer

A technology of continuously variable transmission and fixed-ratio transmission, applied in the direction of belt/chain/gear, mechanical equipment, transmission device, etc., can solve the problems of small output torque, unfavorable transmission popularization, and inability to use large-displacement vehicles, etc., to achieve elimination slippery effect

Inactive Publication Date: 2011-08-10
李正桐 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some inherent shortcomings of this transmission are difficult to solve, such as its small output torque, mostly below 300 Nm, which cannot be used for large-displacement vehicles. For larger output torque requirements, such as trucks, diesel locomotives, Tanks, ships, etc. are even more unsatisfactory; moreover, its speed range and speed ratio are also relatively narrow, usually no more than 6: 1, so it must be used with a speed changer with a fixed speed ratio; a more realistic problem is, This kind of transmission has high quality and technical requirements for the transmission chain or transmission steel belt, and my country does not have independent intellectual property rights for such products at present, so the single improvement of the transmission structure can only obtain part of the intellectual property rights at best, and the transmission parts need Rely on imports
This will greatly increase the manufacturing and use costs of the transmission, which is not conducive to the popularization of this transmission
[0004] Although some other types of continuously variable transmissions have larger output torque than the cone-disc type, they are also limited. According to the existing data, the continuously variable transmission that can output thousands or tens of thousands of Nm is still a blank in this technical field.

Method used

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  • Large-torque roll-type constant ratio/stepless speed changer
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  • Large-torque roll-type constant ratio/stepless speed changer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Such as Figure 1a to Figure 1d , Figure 2a to Figure 2f as well as Figure 3a , Figure 3b As shown, the continuously variable transmission provided by the present invention is a conical double-roller transmission, and each pair of rollers 160 includes two conical rollers A and B, and the two driving rollers of A and B are in contact with the transmission chain at the same time. The speed is equal. In this embodiment, the four tapered rollers in the driving pair of rollers 160 and the driven pair of rollers 160 are tapered rollers with the same shape, size and size (see Figure 1a , 1b , 1c shown).

[0061] The tapered roller is: a conical drive roller coaxially fixed on the roller shaft. The tapered roller preferably has a half-vertex angle θ<arctgμ, where μ is the friction coefficient between the tapered roller and the chain. Such a structure can effectively prevent Drive chain slipped axially.

[0062] Wherein in every pair of rollers 160, two identical taper...

Embodiment 2

[0073] Such as Figure 13a , 13b As shown, the high-torque roller-type constant-ratio transmission provided by the present invention is a chain transmission mechanism, which includes:

[0074] The active pair of rollers and the driven pair of rollers, each pair of said pair of rollers includes two roller shafts A and B, and a transmission roller is fixed on each roller shaft; an endless transmission chain, which is connected between the two rollers of the said driving pair of rollers The drive roller surrounds several circles from its outer edge, and is arranged on the two drive rollers of the driven pair roller to surround several circles from its outer edge;

[0075] Can also include:

[0076] Synchronous transmission mechanism, which is arranged between the two roller shafts of A and B in each pair of rollers, so that the two roller shafts of A and B in each pair of rollers rotate in the same direction and the two transmission rollers of A and B are connected with the tra...

Embodiment 3

[0084] Such as Figure 4a to Figure 4c , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 8aAs shown, the continuously variable transmission provided by the present invention is a variable diameter roller type continuously variable transmission, and the drive rollers are two pairs of rollers. The two driving pair of rollers and the driven pair of rollers are the reducing rollers 260 with the same shape, size and size. The roller shaft 230 of the driving roller is fixed on the cabinet 210 through the bearing 240 .

[0085] Such as Figure 5 As shown, each reducing roller 260 includes a pair of spoke discs 262, a pair of helical discs 261, and a truss 263 matched with each spoke disc.

[0086] Such as Figure 5 , 6 As shown, the spoke-groove disc 262 is a disc with dozens of radial and evenly distributed through-slots 262a, the slots are equal in width, one end of which is inwardly close to the shaft diameter, and the other end is outwardly close to the disc di...

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PUM

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Abstract

The present invention provides a large-torque roll-type speed changer which is a chain or strip type constant ratio or stepless speed changer. The large-torque roll-type speed changer comprises a driving pair roller and a driven pair roller. Each pair roller comprises a first roller shaft and a second roller shaft. Each roller shaft is fixed with a transmission roller. The transmission roller in each pair roller is a roller with fixed diameter, a tapered roller or a diameter-variable roller. The outer diameter of the diameter-variable roller, namely the outer diameter of the transmission roller contacting with the transmission chain has a size-variable structure. The annular transmission chain or strip are respectively installed for surrounding from the outer margin on two transmission rollers of the driving pair roller and the driven pair roller. The transmission roller is a diameter-variable wheel for the speedless speed changer. The stepless speed changer also comprises a speed adjusting mechanism which is connected with a transmission roller for changing the outer diameter of the transmission roller contacting with the transmission chain. According to the speed changer, the output torque can obtain ten thousands of Newton*meter and the speed ratio can obtain 15:1. The transmission component can adopt a standard component with a random chain belt and has a large tolerance. The speed changer can be manufactured to an open structure and furthermore has excellent durability in the adverse working environments of slurry, dust, salt mist, etc.

Description

technical field [0001] The invention belongs to the field of mechanical transmission, and relates to a mechanical stepless transmission, in particular a stepless transmission capable of outputting large torque and having a relatively large speed ratio, and a fixed-ratio transmission capable of outputting large torque. Background technique [0002] In most mechanical devices that need to change speed, such as vehicles, ships, construction machinery, factories, mines and port machinery, etc., stepless speed change is better than stepped speed change. The vehicle is particularly beneficial, especially because it can realize the optimal matching of the drive train and the engine operating conditions, which is beneficial to the working life of the engine and energy saving. [0003] Due to these advantages of CVTs, people have developed various CVTs, among which friction-type conical-disc CVTs have been widely used. However, some inherent shortcomings of this transmission are dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H7/00F16H9/00
Inventor 李正桐
Owner 李正桐