阅读说明：本技术 一种永磁式直角减速器 (Permanent magnet type right-angle speed reducer ) 是由 刘昊 王雷 张黎 朱玉芹 李松 李健 王海洋 于 2020-11-16 设计创作，主要内容包括：本发明涉及减速器技术领域,一种永磁式直角减速器,包括磁场调制环和两个转子,其中磁场调制环为“L”形结构,其中非金属隔离套沿其延伸方向设有多个间隔设置的安装槽,导磁块置于安装槽中；转子分别设置在磁场调制环上,转子中转子导磁壳体具有圆柱状的回转面,转子永磁体安装在转子导磁壳体回转面,转子永磁体沿回转面轴向方向延伸且间隔设置,且相邻两个转子永磁体的N\S磁极交替排布,转子永磁体与导磁块之间形成气隙,转子轴承的内圈和外圈分别与磁场调制环和转子导磁壳体固定连接。本发明利用磁场是封闭场的特性实现负载对于低速大转矩的需求,装置转矩密度高,且可在驱动系统与负载滚筒垂直放置的工况应用永磁式直角减速器。(The invention relates to the technical field of speed reducers, in particular to a permanent magnet type right-angle speed reducer which comprises a magnetic field modulation ring and two rotors, wherein the magnetic field modulation ring is of an L-shaped structure, a plurality of mounting grooves which are arranged at intervals are formed in a non-metal isolation sleeve along the extension direction of the non-metal isolation sleeve, and a magnetic conduction block is arranged in each mounting groove; the rotor sets up respectively on magnetic field modulation ring, and rotor magnetic conduction casing has cylindric surface of revolution in the rotor, and the rotor permanent magnet is installed at rotor magnetic conduction casing surface of revolution, and the rotor permanent magnet extends and the interval sets up along the surface of revolution axial direction, and the N S magnetic pole of two adjacent rotor permanent magnets arranges in turn, forms the air gap between rotor permanent magnet and the magnetic conduction piece, and rotor bearing' S inner circle and outer lane respectively with magnetic field modulation ring and rotor magnetic conduction casing fixed connection. The invention realizes the requirement of the load on low-speed large torque by utilizing the characteristic that the magnetic field is a closed field, has high torque density, and can apply the permanent magnet type right-angle speed reducer under the working condition that a driving system and a load roller are vertically arranged.)

1. A permanent magnet type right-angle speed reducer is characterized in that: comprises that

The magnetic field modulation ring is of an L-shaped structure and comprises a first straight line section, a second straight line section perpendicular to the first straight line section and a connecting section for connecting the first straight line section and the second straight line section; the magnetic field modulation ring comprises a non-metal isolation sleeve and a plurality of magnetic conduction blocks, the non-metal isolation sleeve is provided with a plurality of mounting grooves arranged at intervals along the extension direction of the non-metal isolation sleeve, two ends of each mounting groove respectively extend to a first straight line section and a second straight line section, and the magnetic conduction blocks are arranged in the mounting grooves; and

the two rotors are respectively arranged at the first linear segment and the second linear segment and comprise rotor magnetic conduction shells, an even number of rotor permanent magnets and rotor bearings, wherein each rotor magnetic conduction shell is provided with a cylindrical revolution surface, the rotor permanent magnets are arranged on the revolution surface of the rotor magnetic conduction shell, the rotor permanent magnets extend along the axial direction of the revolution surface and are arranged at intervals, the N \ S magnetic poles of the two adjacent rotor permanent magnets are alternately arranged, an air gap is formed between each rotor permanent magnet and the corresponding magnetic conduction block, and the inner ring and the outer ring of each rotor bearing are respectively and fixedly connected with the magnetic field modulation ring and the rotor magnetic conduction shell;

the number of the magnetic conduction blocks is M₃In the two rotors, the number of the permanent magnets of the rotor at the input end is 2M₁The number of permanent magnets of the output end rotor is 2M₂The number M of the magnetic conduction blocks₃Satisfies M₃＝M₁+M₂Or M₃＝M₁-M₂。

2. The permanent magnet right angle decelerator of claim 1, wherein: the rotor permanent magnet motor is characterized in that a plurality of separation bulges are arranged on the revolution surface of the magnetic conduction shell, the separation bulges radially extend by taking the axis of the revolution surface as the center, a fan-shaped groove is formed between every two adjacent separation bulges, and the rotor permanent magnet is arranged in the groove.

3. The permanent magnet right angle decelerator of claim 2, wherein: and a limiting structure used for limiting the rotor permanent magnet to axially move along the revolution surface is arranged in the groove.

Technical Field

The invention relates to the technical field of speed reducers, in particular to a permanent magnet type right-angle speed reducer.

Background

In industry, most devices have high requirements on operation torque and have little requirements on operation rotating speed, but the rotating speed of a common asynchronous motor is relatively fixed, so that the output of low-speed and high-torque is difficult to achieve, and therefore a speed reducer is required to be arranged between the motor and a load, so that the rotating speed of a transmission system is reduced, and the transmission torque is improved.

In some special occasions, such as a belt conveyor, a scraper and other equipment, because the installation space is limited, the driving system and the load roller are often vertically arranged, and the driving system and the load roller are connected through a right-angle speed reducer. The input and output shafts of the right-angle reducer are vertically arranged, so that the axes of the rotating shafts can rotate 90 degrees in a certain plane and then are connected to a load.

The existing reduction gearbox is mostly of a mechanical gear type, the increase or reduction of torque is realized through the meshing between gears with different tooth numbers, the mechanical structure is simple and effective, but the following defects exist in the operation process:

1. when the load impact is strong, the mechanical gear is always subjected to tooth striking, so that the gear is damaged;

2. when the load rotation speed requirement is high, the abrasion between the mechanical gears can cause large energy waste and influence the efficiency of a transmission system, and meanwhile, the abrasion can also shorten the service life of the gears

3. The mechanical gear needs to use lubricating oil to maintain the working state of the mechanical gear, the temperature rise in the operation process is reduced, and equipment needs to be overhauled, filled with oil and the like periodically when in use;

4. the motor is in pure rigid mechanical connection with the load, and the vibration state of the load can be transmitted to the motor, so that the running state of the motor is influenced, and the service life of the whole system is shortened;

5. the overload protection function is not provided, and when the load is blocked, the load is easy to be directly damaged;

6. the mechanical gear type reduction gearbox has higher operation noise.

In the prior art, most permanent magnet speed reducers are of a coaxial structure, and when a driving system is vertically arranged with a load, a right-angle speed reducer is required for switching; the only permanent magnet speed reducer capable of enabling the input shaft and the output shaft to be arranged in a right angle mode is of a conical gear structure, the radial size of the equipment is large, the overall torque density of the equipment is low, and actual requirements are difficult to meet.

Disclosure of Invention

In order to solve the problems, the invention provides a permanent magnet type right-angle speed reducer which solves the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a permanent-magnet right-angle speed reducer comprises

The magnetic field modulation ring is of an L-shaped structure and comprises a first straight line section, a second straight line section perpendicular to the first straight line section and a connecting section for connecting the first straight line section and the second straight line section; the magnetic field modulation ring comprises a non-metal isolation sleeve and a plurality of magnetic conduction blocks, the non-metal isolation sleeve is provided with a plurality of mounting grooves arranged at intervals along the extension direction of the non-metal isolation sleeve, two ends of each mounting groove respectively extend to a first straight line section and a second straight line section, and the magnetic conduction blocks are arranged in the mounting grooves; and

the two rotors are respectively arranged at the first linear segment and the second linear segment and comprise rotor magnetic conduction shells, an even number of rotor permanent magnets and rotor bearings, wherein each rotor magnetic conduction shell is provided with a cylindrical revolution surface, the rotor permanent magnets are arranged on the revolution surface of the rotor magnetic conduction shell, the rotor permanent magnets extend along the axial direction of the revolution surface and are arranged at intervals, the N \ S magnetic poles of the two adjacent rotor permanent magnets are alternately arranged, an air gap is formed between each rotor permanent magnet and the corresponding magnetic conduction block, and the inner ring and the outer ring of each rotor bearing are respectively and fixedly connected with the magnetic field modulation ring and the rotor magnetic conduction shell;

the number of the magnetic conduction blocks is M₃In the two rotors, the number of the permanent magnets of the rotor at the input end is 2M₁The number of permanent magnets of the output end rotor is 2M₂The number M of the magnetic conduction blocks₃Satisfies M₃＝M₁+M₂Or M₃＝M₁-M₂。

Preferably, the revolution surface of the magnetic conduction shell is provided with a plurality of separation bulges, the separation bulges radially extend by taking the axis of the revolution surface as the center, a fan-shaped groove is formed between every two adjacent separation bulges, and the rotor permanent magnet is arranged in the groove.

Preferably, a limiting structure used for limiting the rotor permanent magnet to move along the axial direction of the revolution surface is arranged in the groove.

The beneficial effects of the invention are as follows:

according to the invention, one rotor rotates on the magnetic field modulation ring, so that a magnetic field generated by the rotor is transmitted to the other rotor through the magnetic field modulation ring, and then the other rotor is driven to rotate, thus realizing non-contact transmission of power and forming the magnetic speed reducer. The invention realizes the requirement of the load on low-speed large torque by utilizing the characteristic that the magnetic field is a closed field, has high torque density, can apply the permanent magnet type right-angle speed reducer under the working condition that the driving system and the load roller are vertically arranged, and overcomes the use limit of the traditional permanent magnet speed reducer.

Drawings

FIG. 1 is a schematic diagram of the permanent magnet right-angle reducer of the present invention.

Fig. 2 is a structural view of a permanent magnet type right angle decelerator of the present invention.

Fig. 3 is a sectional view taken along a-a in fig. 2.

Fig. 4 is a sectional view taken in the direction B-B in fig. 2.

The reference numerals include:

1-a high-speed end rotor; 2-a magnetic field modulation loop; 3-low speed end rotor;

11-high speed end rotor magnetic conductive shell; 12-high speed end rotor permanent magnets; 13-high speed end rotor permanent magnet cover; 14-high speed end rotor bearing; 15-high speed end rotor gland;

21-a magnetic conduction block; 22-a non-metallic spacer sleeve;

31-low speed end rotor magnetic conductive shell; 32-low speed end rotor permanent magnets; 33-low speed end rotor permanent magnet cover; 34-low speed end rotor bearing; 35-low speed end rotor gland.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

As shown in fig. 1 to 4, the permanent magnet type right angle speed reducer proposed by the present embodiment includes

The magnetic field modulation ring 2 is of an L-shaped structure, and the magnetic field modulation ring 2 comprises a first straight line section, a second straight line section perpendicular to the first straight line section and a connecting section for connecting the first straight line section and the second straight line section; the magnetic field modulation ring 2 comprises a non-metal isolation sleeve 22 and a plurality of magnetic conduction blocks 21, the non-metal isolation sleeve 22 is provided with a plurality of mounting grooves arranged at intervals along the extension direction of the non-metal isolation sleeve, two ends of each mounting groove respectively extend to the first straight line section and the second straight line section, and the magnetic conduction blocks 21 are arranged in the mounting grooves; and

the two rotors are respectively arranged at the first linear segment and the second linear segment, each rotor comprises a rotor magnetic conduction shell, an even number of rotor permanent magnets and a rotor bearing, wherein the rotor magnetic conduction shell is provided with a cylindrical revolution surface, the rotor permanent magnets are arranged on the revolution surface of the rotor magnetic conduction shell, the rotor permanent magnets extend along the axial direction of the revolution surface and are arranged at intervals, the N \ S magnetic poles of the two adjacent rotor permanent magnets are alternately arranged, an air gap is formed between each rotor permanent magnet and the magnetic conduction block 21, and the inner ring and the outer ring of each rotor bearing are respectively and fixedly connected with the magnetic field modulation ring 2 and the rotor magnetic conduction shell;

the number of the magnetic conduction blocks 21 is M₃In the two rotors, the number of the permanent magnets of the rotor at the input end is 2M₁The number of permanent magnets of the output end rotor is 2M₂Number M of magnetic conductive blocks 21₃Satisfies M₃＝M₁+M₂Or M₃＝M₁-M₂。

The rotary surface of the magnetic conduction shell is provided with a plurality of separation bulges, the separation bulges radially extend by taking the axis of the rotary surface as the center, a fan-shaped groove is formed between every two adjacent separation bulges, and the rotor permanent magnet is arranged in the groove.

And a limiting structure used for limiting the rotor permanent magnet to axially move along the revolution surface is arranged in the groove.

Example 1

In this embodiment, the rotors are the high-speed end rotor 1 and the low-speed end rotor 3, respectively, and the high-speed end rotor 1 and the low-speed end rotor 3 are both sleeved outside the magnetic field modulation ring 2. In other embodiments, the magnetic field modulation ring 2 has a cavity therein, and the high-speed end rotor 1 and the low-speed end rotor 3 may also be inserted into the magnetic field modulation ring 2, or may also be respectively sleeved outside the magnetic field modulation ring 2 or inserted into the magnetic field modulation ring 2. The arrangement form of the high-speed-end rotor 1 and the low-speed-end rotor 3 forms 4 forms.

Wherein the high-speed end rotor 1 and the low-speed end rotor 3 are provided with permanent magnets which are uniformly distributed, the high-speed end rotor 1 and the low-speed end rotor 3 are vertically arranged, and the main body of the magnetic field modulation ring 2 is made of magnetic conduction steel and is L-shaped. When the permanent magnet type right-angle speed reducer operates, the high-speed end rotor 1 rotates at a high speed, the magnetic field modulation ring 2 is fixed, the low-speed end rotor 3 rotates at a low speed, and the rotation speed multiple between the high-speed end rotor 1 and the low-speed end rotor 3 is the torque-increasing multiple of the speed reducer.

As shown in fig. 2, the high-speed end rotor 1 includes a high-speed end rotor magnetic conductive casing 11, a high-speed end rotor permanent magnet 12, a high-speed end rotor permanent magnet cover 13, a high-speed end rotor bearing 14, and a high-speed end rotor gland 15. As shown in fig. 3, the high-speed end rotor magnetic conduction shell 11 is annular and has 2M₁The permanent magnet containing grooves are uniformly distributed in the high-speed end rotor magnetic conduction shell 11; the high-speed end rotor permanent magnet 12 is arranged in the grooveThe N \ S magnetic poles are alternately arranged according to different N \ S magnetic poles.

As shown in fig. 4, the low-speed-end rotor 3 includes a low-speed-end rotor magnetic conductive casing 31, low-speed-end rotor permanent magnets 32, a low-speed-end rotor permanent magnet cover 33, a low-speed-end rotor bearing 34, and a low-speed-end rotor cover 35. As shown in fig. 4, the low-speed end rotor magnetic conductive shell 31 is annular and has 2M₂The permanent magnet containing grooves are uniformly distributed in the low-speed end rotor magnetic conduction shell 31; the low-speed end rotor permanent magnets 32 are arranged in the slots and are alternately arranged according to different N/S magnetic poles.

The magnetic field modulation ring 2 comprises a non-metal isolation sleeve 22 and a magnetic conduction block 21, the magnetic conduction block 21 is L-shaped, and the magnetic conduction block 21 is shared (M)₂-M₁) Or (M)₂+M₁) Number M of magnetic conduction blocks 21₃The reduction ratio of the permanent magnet type right-angle speed reducer and the rotation direction of the low-speed end rotor 3 are affected. When the number M of the magnetic conduction blocks 21₃＝M₂-M₁When viewed from the driving side, the rotation direction of the high-speed end rotor 1 is opposite to the rotation direction of the low-speed end rotor 3 viewed from the load side; when the number M of the magnetic conduction blocks 21₃＝M₂+M₁In this case, the rotational direction of the high-speed-side rotor 1 when viewed from the driving side is the same as the rotational direction of the low-speed-side rotor 3 when viewed from the load side.

In the using process, the driving system drives the high-speed end rotor 1 to rotate, the high-speed end rotor 1 drives the high-speed rotor permanent magnet 12 to rotate to generate a rotating magnetic field, and the rotating magnetic field is coupled with the magnetic field of the low-speed end rotor permanent magnet 32 through the magnetic conduction block 21 in the magnetic field modulation ring 2 to realize the transmission of torque. The rotation speed ratio of the high-speed end rotor 1 to the low-speed end rotor 3 is M₂/M₁The torque ratio of the high-speed end rotor 1 to the low-speed end rotor 3 is M1/M2, and energy is transmitted from high-speed small torque to low-speed large torque. Because the magnetic field modulation ring 2 is L-shaped, the permanent magnet type right-angle speed reducer can still be well applied to the working condition that the driving system and the load roller are vertically arranged.

As shown in fig. 2, the high-speed end rotor permanent magnet cover 13 is installed in the high-speed end rotor magnetic conductive casing 11, and is used for preventing the high-speed end rotor permanent magnet 12 from generating axial movement; the high-speed end rotor bearing 14 is arranged between the magnetic field modulation ring 2 and the high-speed end rotor 1 and is used for supporting and separating a moving part and a static part, in the embodiment, the static part is an inner ring of the magnetic field modulation ring 2 and the high-speed end rotor bearing 14, and similarly, the high-speed end rotor bearing also comprises an inner ring of the low-speed end rotor bearing 34, and the rest is a moving part; and the high-speed end rotor gland 15 is arranged between the high-speed end rotor magnetic conduction shell 11 and the high-speed end rotor bearing 14 and is used for sealing and supporting the high-speed end rotor 1. Similarly, the low-speed end rotor permanent magnet cover 33 is installed in the low-speed end rotor magnetic conductive shell 31, and is used for preventing the low-speed end rotor permanent magnet 32 from generating axial movement; the low-speed end rotor bearing 34 is arranged between the magnetic field modulation ring 2 and the low-speed end rotor 3 and used for supporting and separating a moving part and a static part; the low-speed end rotor gland 35 is installed between the low-speed end rotor magnetic conductive shell 31 and the low-speed end rotor bearing 34, and is used for sealing and supporting the low-speed end rotor 3.

The curvature radius of the bent part of each magnetic conduction block 21 is different, all the magnetic conduction blocks jointly form an L-shaped cylindrical magnetic field modulation ring 2 which is fixed by a non-metal isolation sleeve 22, the magnetic field modulation ring 2 is arranged between a high-speed end rotor 1 and a low-speed end rotor 3, and the high-speed end rotor 1 and the low-speed end rotor 3 are respectively provided with a high-speed end rotor bearing 14 and a low-speed end rotor bearing 34 which are arranged on the magnetic field modulation ring 2.

As shown in fig. 3, the high-speed end rotor magnetic conductive casing 11 is internally provided with uniformly distributed slots, and the high-speed end rotor permanent magnets 12 are installed in the slots. An air gap is formed between the high-speed end rotor permanent magnet 12 and the nonmetal isolating sleeve 22, the high-speed end rotor permanent magnet and the nonmetal isolating sleeve are not in contact, and the relative position is kept by the high-speed end rotor bearing 14. The magnetic conduction blocks 21 are uniformly distributed in the non-metal isolation sleeve 22 and keep relative positions by the non-metal isolation sleeve 22.

Similarly, as shown in fig. 4, the low-speed end rotor magnetic conductive casing 31 is internally provided with uniformly distributed grooves, and the low-speed end rotor permanent magnets 32 are installed in the grooves. An air gap is formed between the low-speed end rotor permanent magnet 32 and the nonmetal isolating sleeve 22, the low-speed end rotor permanent magnet and the nonmetal isolating sleeve are not contacted, and the relative position is kept by virtue of a low-speed end rotor bearing 34. The magnetic conduction blocks 21 are uniformly distributed in the non-metal isolation sleeve 22 and keep relative positions by the non-metal isolation sleeve 22.

The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.