Inner gear ring floating structure of permanent magnet planetary electric roller

Abstract

The invention discloses a permanent magnet planet electric roller inner gear ring floating structure which comprises a fixed shaft, a second-stage planet carrier, a supporting shaft, a spline shaft, a roller, a motor, a first-stage inner gear ring, a first-stage planet carrier, a second-stage sun gear and a spline inner gear ring. The secondary planet carrier and the fixing shaft are axially arranged in a front-back separated mode, a plurality of rotatable secondary planet gears are arranged on the secondary planet carrier, the spline shaft and the supporting shaft are rotatably installed outside the shaft portion of the secondary planet carrier and the rear end of the fixing shaft in a sleeving mode respectively, and the front end and the rear end of the roller are fixedly connected with the spline shaft and the supporting shaft respectively. The spline inner gear ring is arranged, the spline inner gear ring and the spline shaft are connected through the spline, and the self-aligning roller bearing is arranged in a matched mode, so that the output end floats through the spline inner gear ring, compared with a traditional NGW structure, an output end planetary mechanism is free of floating, the advantages are achieved in the aspects of gear production and manufacturing and cost, meanwhile, automatic self-aligning can be guaranteed, and the service life of the gear is prolonged. Especially for high-power output, the use performance is better.

Description

Technical Field

[0001] The present invention relates to the technical field of electric rollers, and in particular to a floating structure of an internal gear ring of a permanent magnet planetary electric roller. Background Art

[0002] A permanent magnet electric roller is also called a magnetic pulley or a dry bulk magnetic separator. It uses high-performance hard magnetic materials to form a composite magnetic system inside, and has the characteristics of high magnetic field intensity, large depth, simple structure, convenient use, no need for maintenance, no power consumption, and no demagnetization after long-term use. The permanent magnet electric roller can be used for iron selection in industries such as cement, magnetic separation, mining, iron and steel, chemical industry, refractories, and waste treatment. It is used in combination with a fixed belt conveyor to replace the driving wheel, or can be used in combination with a special belt conveyor.

[0003] A permanent magnet electric roller usually uses a planetary mechanism for power transmission. A planetary mechanism is a power transmission mechanism that uses a speed converter of gears to reduce the rotation speed of a motor to the required rotation speed and obtain a larger torque. Among them, the input and output methods are flexible, the structure is simple, the rigidity is good, the accuracy of motion transmission is high, the structure is stable and reliable, and the load capacity is strong. It has now been widely used in various industries.

[0004] The planetary mechanism is designed with two types: floating and non-floating. Among them, the non-floating structure has high requirements for the manufacturing ability of machine tools and equipment and also for the assembly skills of personnel. It is usually used in precision industries. For the transportation industry and industries with high-power output, the use of a floating structure has no high requirements for equipment and personnel, and obviously has more advantages.

[0005] At present, the permanent magnet planetary electric roller adopts the NGW structure. NGW is composed of the first letters of the Chinese pinyin of the three characters "inner, public, and outer". In order to evenly distribute the loads of the three planetary gears, a tooth type floating mechanism is adopted, that is, the sun gear or the planetary carrier floats, or both the sun gear and the planetary carrier float at the same time. This structure is relatively difficult to manufacture in gear production, and the cost is relatively high, and it does not have the function of automatic centering, and the use performance is not good. Therefore, it is necessary to study a solution to solve the above problems. Summary of the Invention

[0006] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present invention is to provide a floating structure of an internal gear ring of a permanent magnet planetary electric roller, which can effectively solve the problems that the planetary mechanism of the existing permanent magnet electric roller has difficult manufacturing, high cost and no automatic centering function.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions: A permanent magnet planetary electric drum inner gear ring floating structure, comprising a fixed shaft, a secondary planet carrier, a support shaft, a spline shaft, a drum, a motor, a primary inner gear ring, a primary planet carrier, a secondary sun gear and a spline inner gear ring; The secondary planetary carrier and the fixed shaft are arranged axially in a front-to-back manner, and a plurality of rotatable secondary planetary gears are arranged on the secondary planetary carrier. The spline shaft and the support shaft are rotatably mounted and sleeved on the shaft of the secondary planetary carrier and the rear end of the fixed shaft, respectively. The front and rear ends of the drum are fixedly connected to the spline shaft and the support shaft, respectively. The motor is suspended in the drum, the rear end of the motor is fixedly connected to the front end of the support shaft, the front end of the motor has a motor shaft, and the front end of the motor shaft has an output wheel. The front and rear ends of the primary inner gear ring are fixedly connected to the front end of the motor and the rear end of the secondary planetary carrier, respectively. The primary planetary carrier can The primary planetary carrier is rotatably mounted in the primary inner gear ring, and a plurality of rotatable primary planetary gears are arranged on the primary planetary carrier, and the primary planetary gears are meshingly connected between the output wheel and the primary inner gear ring; the secondary sun gear is fixedly connected to the front end of the primary planetary carrier and is located in the secondary planetary carrier, and the secondary sun gear is meshingly connected to the secondary planetary gears; the splined internal gear ring is rotatably mounted on the secondary planetary carrier through a spherical roller bearing, the splined internal gear ring is located on the periphery of the secondary planetary carrier, the front end of the splined internal gear ring is connected to the rear end of the spline shaft through a spline, and the rear end of the splined internal gear ring is meshingly connected to a plurality of secondary planetary gears.

[0008] Preferably, the spline shaft is fixedly connected to the drum via a first bolt.

[0009] Preferably, the secondary sun gear is connected to the front end of the primary planet carrier via a flat key.

[0010] Preferably, the spline shaft and the support shaft are rotatably mounted and sleeved outside the shaft portion of the secondary planetary carrier and the rear end of the fixed shaft through a first bearing and a second bearing respectively.

[0011] Preferably, the first-stage planet carrier is rotatably mounted in the first-stage inner gear ring via a third bearing.

[0012] Preferably, the rear end of the primary internal gear ring is fixedly connected to the front end of the motor via a second bolt.

[0013] Preferably, the front end of the primary internal gear ring is fixedly connected to the rear end of the secondary planetary carrier via a third bolt.

[0014] Preferably, a wire guide hole is provided at the rear end of the fixed shaft, and the wire guide hole is connected between the inside of the drum and the outside of the drum.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that: By setting a spline inner gear ring, utilizing the spline connection between the spline inner gear ring and the spline shaft, and co-arranging a spherical roller bearing, the output end can adopt the spline inner gear ring to float. Compared with the traditional NGW structure, the output end planetary mechanism adopts non-floating, which has advantages in gear production and manufacturing and cost, and can also ensure automatic self-alignment, especially in high-power output, with better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention; Figure 2 is a cross-sectional view of a preferred embodiment of the present invention; Figure 3 yes Figure 2 A partial enlarged schematic diagram of Figure 4 yes Figure 3 A partial enlarged schematic diagram of .

[0017] Description of the accompanying drawings: 11. Fixed shaft 111. Lead hole 12. Secondary planet carrier 121. Shaft 122, limit ring 13, support shaft 14. Spline shaft 15. Roller 16. Motor 161. Motor shaft 162, output wheel 17, primary internal gear ring 18. First-stage planet carrier 19. Second-stage sun gear 20. Splined internal gear ring 21. Secondary planetary gear 22. Snap ring 23. First bearing 24. Second bearing 25. First bolt 26. Second bolt 27. First-stage planetary gear 28. Third bearing 29. Flat key 30. Spherical roller bearings DETAILED DESCRIPTION

[0018] Please refer to Figures 1 to 4 As shown, it shows the specific structure of a preferred embodiment of the present invention, including a fixed shaft 11, a secondary planetary carrier 12, a support shaft 13, a spline shaft 14, a roller 15, a motor 16, a primary internal gear ring 17, a primary planetary carrier 18, a secondary sun gear 19 and a spline internal gear ring 20.

[0019] A lead-in hole 111 is formed at the rear end of the fixed shaft 11 , and the lead-in hole 111 is connected between the inside of the drum 15 and the outside of the drum 15 , so as to lead out the connecting wire of the motor 16 and connect it to an external power source.

[0020] The secondary planetary carrier 12 and the fixed shaft 11 are axially arranged separately front and back, and a plurality of rotatable secondary planetary gears 21 are arranged on the secondary planetary carrier 12. The secondary planetary carrier 12 has a shaft portion 121, and a limiting ring 122 is protruding from the secondary planetary carrier 12, and the limiting ring 122 is located behind the shaft portion 121, and a retaining ring 22 is installed on the secondary planetary carrier 122, and the retaining ring 22 is located between the shaft portion 121 and the limiting ring 122.

[0021] The spline shaft 14 and the support shaft 13 are rotatably mounted and sleeved outside the shaft portion 121 of the secondary planetary carrier 12 and the rear end of the fixed shaft 11. In this embodiment, the spline shaft 14 and the support shaft 13 are rotatably mounted and sleeved outside the shaft portion 121 of the secondary planetary carrier 12 and the rear end of the fixed shaft 11 through the first bearing 23 and the second bearing 24, respectively.

[0022] The front and rear ends of the roller 15 are fixedly connected to the spline shaft 14 and the support shaft 13 respectively; in this embodiment, the spline shaft 14 is fixedly connected to the roller 15 by a first bolt 25, which has a simple structure and is easy to assemble.

[0023] The motor 16 is suspended in the drum 15 , and the rear end of the motor 16 is fixedly connected to the front end of the support shaft 13 . The front end of the motor 16 has a motor shaft 161 , and the front end of the motor shaft 161 has an output wheel 162 .

[0024] The front and rear ends of the first-stage internal gear ring 17 are fixedly connected to the front end of the motor 16 and the rear end of the second-stage planetary carrier 12 respectively; in the present embodiment, the rear end of the first-stage internal gear ring 17 is fixedly connected to the front end of the motor 16 via a second bolt 26, and the front end of the first-stage internal gear ring 17 is fixedly connected to the rear end of the second-stage planetary carrier 12 via a third bolt (not shown in the figure).

[0025] The primary planet carrier 18 is rotatably mounted in the primary inner gear ring 17. A plurality of rotatable primary planetary gears 27 are disposed on the primary planet carrier 18. The primary planetary gears 27 are meshedly connected between the output wheel 162 and the primary inner gear ring 17. In this embodiment, the primary planet carrier 18 is rotatably mounted in the primary inner gear ring 17 via a third bearing 28.

[0026] The secondary sun gear 19 is fixedly connected to the front end of the primary planet carrier 18 and is located in the secondary planet carrier 12. The secondary sun gear 19 is meshed and connected with the secondary planet gear 21. In this embodiment, the secondary sun gear 19 is connected to the front end of the primary planet carrier 18 through a flat key 29.

[0027] The spline inner gear ring 20 is rotatably mounted on the secondary planet carrier 12 through a spherical roller bearing 30. The spline inner gear ring 20 is located at the periphery of the secondary planet carrier 12. The front end of the spline inner gear ring 20 is connected to the rear end of the spline shaft 14 through a spline, and the rear end of the spline inner gear ring 20 is meshed and connected with a plurality of secondary planetary gears 21. In the embodiment, the spherical roller bearing 30 is clamped and fixed between the limit ring 122 and the retaining ring 22.

[0028] The working principle of this embodiment is described in detail as follows: When in use, the rear end of the fixed shaft 11 and the front end of the secondary planetary carrier 12 are fixed on the user equipment and do not make rotational motion. When the motor 16 is energized, the motor shaft 161 rotates, and the output wheel 162 rotates with the motor shaft 161. The output wheel 162 drives the primary planetary gear 27 to rotate, so that the primary planetary carrier 18 rotates. Then, the primary planetary carrier 18 transmits power to the secondary sun gear 19 through the flat key 29. Then, the secondary sun gear 19 transmits power to the spline inner gear ring 20 through the secondary planetary gear 21. Then, the spline inner gear ring 20 drives the spline shaft 14 to rotate, and finally the spline shaft 14 drives the drum 15 to rotate. During the rotation process, when the spline inner gear ring 20 is subjected to uneven force, the spherical roller bearing 30 will rotate with the change of force to ensure that the force on the spline inner gear ring 20 is in a uniform state. At the same time, the spline uses its own centering function to change with the change of the force on the spline inner gear ring 20.

[0029] The design focus of the present invention is: by setting a spline internal gear ring, utilizing the spline connection between the spline internal gear ring and the spline shaft, and co-setting a spherical roller bearing, the output end adopts the spline internal gear ring to float. Compared with the traditional NGW structure, the output end planetary mechanism adopts non-floating, which has advantages in gear production and manufacturing and cost, and can also ensure automatic self-alignment, especially in high-power output, with better performance.

[0030] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A floating structure of the inner gear ring of a permanent magnet planetary electric drum, characterized in that: It includes a fixed shaft, a secondary planet carrier, a supporting shaft, a spline shaft, a roller, a motor, a primary internal gear ring, a primary planet carrier, a secondary sun gear and a spline internal gear ring; The secondary planetary carrier and the fixed shaft are arranged axially in a front-to-back manner, and a plurality of rotatable secondary planetary gears are arranged on the secondary planetary carrier. The spline shaft and the support shaft are rotatably mounted and sleeved on the shaft of the secondary planetary carrier and the rear end of the fixed shaft, respectively. The front and rear ends of the drum are fixedly connected to the spline shaft and the support shaft, respectively. The motor is suspended in the drum, the rear end of the motor is fixedly connected to the front end of the support shaft, the front end of the motor has a motor shaft, and the front end of the motor shaft has an output wheel. The front and rear ends of the primary inner gear ring are fixedly connected to the front end of the motor and the rear end of the secondary planetary carrier, respectively. The primary planetary carrier can The primary planetary carrier is rotatably mounted in the primary inner gear ring, and a plurality of rotatable primary planetary gears are arranged on the primary planetary carrier, and the primary planetary gears are meshingly connected between the output wheel and the primary inner gear ring; the secondary sun gear is fixedly connected to the front end of the primary planetary carrier and is located in the secondary planetary carrier, and the secondary sun gear is meshingly connected to the secondary planetary gears; the splined internal gear ring is rotatably mounted on the secondary planetary carrier through a spherical roller bearing, the splined internal gear ring is located on the periphery of the secondary planetary carrier, the front end of the splined internal gear ring is connected to the rear end of the spline shaft through a spline, and the rear end of the splined internal gear ring is meshingly connected to a plurality of secondary planetary gears.

2. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: The spline shaft is fixedly connected to the roller via a first bolt.

3. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1 is characterized in that: The secondary sun gear is connected to the front end of the primary planet carrier through a flat key.

4. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: The spline shaft and the support shaft are rotatably mounted and sleeved outside the shaft portion of the secondary planetary carrier and the rear end of the fixed shaft through the first bearing and the second bearing respectively.

5. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: The first-stage planet carrier is rotatably mounted in the first-stage internal gear ring via a third bearing.

6. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: The rear end of the primary internal gear ring is fixedly connected to the front end of the motor through a second bolt.

7. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: The front end of the primary inner gear ring is fixedly connected to the rear end of the secondary planet carrier through a third bolt.

8. The floating structure of the inner gear ring of the permanent magnet planetary electric drum according to claim 1, characterized in that: A wire guide hole is provided at the rear end of the fixed shaft, and the wire guide hole is communicated between the inside of the drum and the outside of the drum.

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