Non-contact power transmission device and rotating speed control system

Abstract

The invention relates to the technical field of transmission, and discloses a non-contact power transmission device and a rotating speed control system. The driving wheel is connected with the power piece; a first cavity is formed in the driving wheel; a first magnet is arranged around the inner circumferential wall of the first cavity; the driven wheels are sleeved with the first magnets at intervals. A second cavity is formed in the driven wheel; a second magnet is arranged around the inner circumferential wall of the second cavity; according to the contact type power transmission device, the driving wheel drives the driven wheel to rotate through magnetic acting force and magnetic torque between the first magnet and the second magnet, and power transmission is achieved. Through non-contact magnetic acting force and magnetic torque, the driving wheel drives the driven wheel to rotate, the driven wheel obtains the rotating speed, and power transmission is conducted. And due to no physical contact, noise and vibration are reduced. The non-contact power transmission device does not need lubricating grease; the problems of mechanical fatigue, friction loss, tooth surface pitting corrosion and the like do not exist, the transmission efficiency and reliability are remarkably improved, and the service life is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the field of transmission technology, and particularly to a non-contact power transmission device and a rotational speed control system. Background Art

[0002] During the operation of traditional mechanical gear transmissions, noise and vibration are generated. Especially at high speeds, there are defects such as severe wear, decreased transmission efficiency, high lubrication difficulty, pitting corrosion of tooth surfaces, and metal fatigue. These defects have an adverse impact on the environment and operators. Mechanical gear transmissions have relatively strict requirements for the manufacturing precision and installation precision of parts; if the manufacturing precision of parts is insufficient, after installation, intense vibration and a large amount of noise will be generated, seriously affecting the stability and reliability of mechanical gear transmissions. In addition, existing mechanical gear transmissions often require manual lubricant addition at regular intervals, which not only wastes manpower but also easily results in uneven lubrication, seriously affecting the operating efficiency and service life of mechanical gear transmissions. Summary of the Invention

[0003] In view of this, the present invention provides a non-contact power transmission device to solve the problems of severe wear, low transmission efficiency, high lubrication difficulty, pitting corrosion of tooth surfaces, metal fatigue, intense vibration, large noise, and short service life existing in existing mechanical gear transmissions.

[0004] In a first aspect, the present invention provides a non-contact power transmission device, comprising:

[0005] A power member adapted to provide rotational power;

[0006] A driving wheel, the input end of which is connected to the power member; a first cavity is provided at the other end of the driving wheel opposite to the input end; a first magnet is disposed around the inner peripheral wall of the first cavity;

[0007] A driven wheel having an output end for outputting power; at least a part of the driven wheel is spaced and sleeved inside the first magnet disposed around; a second cavity is provided at the other end of the driven wheel opposite to the output end; a second magnet is disposed around the inner peripheral wall of the second cavity;

[0008] The non-contact power transmission device is adapted to drive the driven wheel to rotate through the magnetic force and magnetic torque between the first magnet and the second magnet, so as to achieve power transmission. Beneficial effects: By adopting the above technical solution, the present application drives the driven wheel to rotate through the non-contact magnetic force and magnetic torque, and the driven wheel obtains a certain rotational speed, thereby achieving power transmission. Since there is no physical contact, the technical solution of the present application fundamentally eliminates the problem of particle contamination in power transmission and is applicable to occasions with extremely high cleanliness requirements. The non-contact power transmission device, due to no mechanical contact, reduces noise and vibration generated by friction and impact, providing a more stable and quiet operating environment. The non-contact power transmission device does not require grease, reduces the frequency of replacing parts due to wear or damage, realizes semi-permanent maintenance-free operation, and significantly reduces maintenance costs. Due to no mechanical contact, the non-contact power transmission device does not have problems such as mechanical fatigue, friction loss, and pitting of tooth surfaces, significantly improving transmission efficiency, reliability, and service life. The non-contact power transmission device will not cause any damage even when facing abnormal loads and has an overload protection function.

[0009] Optionally,

[0010] Adjust the first distance between the driving wheel and the driven wheel along the axial direction through the axial adjustment mechanism;

[0011] Adjust the second distance between the first magnet and the second magnet along the radial direction through the radial adjustment mechanism. Beneficial effects: By adopting the above technical solution, the positions of the first magnet located in the driving wheel and the second magnet located in the driven wheel in the axial direction can be adjusted through the axial adjustment mechanism to obtain magnetic forces and magnetic torques of different magnitudes, thereby affecting the rotational speed of the driven wheel; the positions of the first magnet and the second magnet in the radial direction can be adjusted through the radial adjustment mechanism to obtain magnetic forces and magnetic torques of different magnitudes, thereby affecting the rotational speed of the driven wheel.

[0012] Optionally, the axial adjustment mechanism is a lead screw-nut mechanism, a telescopic structure, or a rack and pinion mechanism; the radial adjustment mechanism is a rib-link mechanism, a star slider-guide rail mechanism, a scissor telescopic mechanism, or a magnetic force-driven radial expansion structure.

[0013] Optionally, the first distance is the distance between one end of the first magnet close to the input end and one end of the second magnet far from the output end; the first distance is not less than zero; the second distance is the distance between the inner circumference of the first magnet and the outer circumference of the second magnet; the second distance is not less than zero.

[0014] Optionally, there are multiple first magnets, and the multiple first magnets are evenly arranged along the inner peripheral wall of the first cavity through a slot structure; there are multiple second magnets, and the multiple second magnets are evenly arranged along the inner peripheral wall of the second cavity through a slot structure.

[0015] Optionally, the first spacing is 5 mm, and the second spacing is 1.5 mm; the number of the first magnets and the number of the second magnets are both eight.

[0016] Optionally, the first magnet is a permanent magnet or an electromagnet; the second magnet is a permanent magnet or an electromagnet.

[0017] Optionally, the shape of the first magnet is a sector, a triangle, a rectangle, a cylinder or a trapezoid; the shape of the second magnet is a sector, a triangle, a rectangle, a cylinder or a trapezoid.

[0018] Optionally, it further includes:

[0019] A first housing, wherein the driving wheel is rotatably connected inside the first housing;

[0020] A second housing, wherein the driven wheel is rotatably connected inside the second housing.

[0021] In a second aspect, the present invention further provides a rotational speed control system, including:

[0022] The non-contact power transmission device as described above;

[0023] A rotational speed sensor, arranged at the output end;

[0024] A controller, which is in signal connection with the rotational speed sensor and the power component;

[0025] The rotational speed control system is adapted to obtain the rotational speed of the output end through the rotational speed sensor, feedback it to the controller, and then control the rotational speed of the power component through the controller, and further affect the rotational speed of the driven wheel through the driving wheel, so as to achieve real-time speed compensation. Beneficial effects: By adopting the above technical solutions, the present application can obtain a stable output rotational speed of the driven wheel through speed feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic bottom view structure diagram of the non-contact power transmission device provided in the embodiment of the present invention;

[0028] Figure 2 It is Figure 1 the sectional view taken along line B-B in

[0029] Figure 3Schematic diagram of the first spacing and the second spacing provided in the embodiment of the present invention;

[0030] Figure 4 Side view structural schematic of the non-contact power transmission device provided in the embodiment of the present invention Figure 1 ;

[0031] Figure 5 is Figure 4 Cross-sectional view taken along line C-C in

[0032] Figure 6 Three-dimensional structural schematic of the non-contact power transmission device provided in the embodiment of the present invention Figure 1 ;

[0033] Figure 7 Side view structural schematic of the non-contact power transmission device provided in the embodiment of the present invention Figure 2 ;

[0034] Figure 8 is Figure 7 Cross-sectional view taken along line A-A in

[0035] Figure 9 Top view structural schematic diagram of the non-contact power transmission device provided in the embodiment of the present invention;

[0036] Figure 10 Three-dimensional structural schematic of the non-contact power transmission device provided in the embodiment of the present invention Figure 2 ;

[0037] Figure 11 Schematic diagram of the principle of the speed control system provided in the embodiment of the present invention.

[0038] Explanation of reference numerals:

[0039] 1. Input end; 2. Output end; 3. First magnet; 4. Driven wheel; 5. First bearing; 6. Second bearing; 7. First housing; 8. First half housing; 9. Second half housing; 10. Second motor; 11. Driving wheel; 12. Coupling; 13. Lead screw; 14. Nut; 15. Second magnet; 16. Partition plate; 17. Retaining ring; 18. First connecting block; 19. Central fixing seat; 20. Guide rail; 21. Slide block; 22. Second connecting block. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] As Figures 1 to 10 shown in a specific embodiment of the non-contact power transmission device, it includes: a power component, a driving wheel 11, and a driven wheel 4. Both the driving wheel 11 and the driven wheel 4 can be in the form of gears; the power component can be a first motor. This application designs a non-contact power transmission device based on the principle of the interaction of magnetic attraction and repulsion. The core of this application is to use the magnetic principle to achieve non-contact power transmission, which has the characteristics of non-contact transmission, low-noise operation, simple maintenance, and strong adaptability. The non-contact transmission means that through the magnetic field force, non-contact power transmission between the driving wheel 11 and the driven wheel 4 is achieved, fundamentally eliminating the problems of mechanical wear and particle contamination. The low-noise operation means that due to no mechanical contact, the noise generated during the transmission process is greatly reduced, and a quieter working environment can be provided. The simple maintenance means that there is no need for lubrication and replacement of worn parts, reducing the maintenance cost and achieving semi-permanent maintenance-free operation. The strong adaptability means that the non-contact power transmission device described in this application is applicable to various special environments, especially in places with high environmental requirements such as clean rooms, and can show significant application advantages.

[0042] As Figure 2 , Figure 5 and Figure 8As shown, the power component is adapted to provide rotational power. The input end 1 of the driving wheel 11 is connected to the power component; a first cavity is provided at the other end of the driving wheel 11 opposite to the input end 1; a first magnet 3 is arranged around the inner peripheral wall of the first cavity. The driven wheel 4 is provided with an output end 2 for outputting power; at least part of the driven wheel 4 is sleeved at intervals within the first magnet 3 arranged around; a second cavity is provided at the other end of the driven wheel 4 opposite to the output end 2; a second magnet 15 is arranged around the inner peripheral wall of the second cavity. The non-contact power transmission device is adapted to drive the driven wheel 4 to rotate through the magnetic force and magnetic torque between the first magnet 3 and the second magnet 15, so as to realize power transmission. An isolation plate 16 is provided at the opening of the second cavity far from the output end 2; the isolation plate 16 is used for magnetic isolation, blocking or reducing the influence on the magnetic field of the second magnet 15; reducing the leakage of the magnetic field of the second magnet 15 and reducing the influence of the external environment on the magnetic field of the second magnet 15. The technical solution of the present application transmits power through non-contact magnetic force and magnetic torque, without rigid contact. When the driving wheel 11 undergoes sudden changes or vibrations, it will not directly affect the operation of the driven wheel 4, so as to achieve the effect of running independently and without mutual influence. Preferably, the axes of the driving wheel 11 and the driven wheel 4 are arranged coaxially.

[0043] Further, as Figure 2 , Figure 3 and Figure 8 shown, the first distance Δh along the axial direction between the driving wheel 11 and the driven wheel 4 is adjusted by an axial adjustment mechanism. The second distance Δd along the radial direction between the first magnet 3 and the second magnet 15 is adjusted by a radial adjustment mechanism.

[0044] Specifically, the axial adjustment mechanism is a lead screw nut mechanism, a telescopic structure or a rack and pinion mechanism, etc.; the telescopic structure includes: a telescopic rod and a telescopic sleeve; or the telescopic structure is a pneumatic cylinder or a hydraulic cylinder. Preferably, the axial adjustment mechanism is a lead screw nut mechanism; the lead screw nut mechanism has the advantages of high transmission accuracy and can realize precise axial movement. As Figures 2 to 6 shown, the lead screw nut mechanism includes: a second motor 10, a coupling 12, a lead screw 13, a nut 14 and a first connecting block 18, etc. connected in sequence. Specifically, the lead screw 13 can be a ball screw to improve the accuracy of axial distance adjustment; the nut 14 can be a waist-shaped nut. When the nut 14 is connected to the driving wheel 11 or the driven wheel 4 through the first connecting block 18, the second motor 10 drives the lead screw 13 to rotate through the coupling 12, and the nut 14 moves along the axial direction of the lead screw 13, and then through the first connecting block 18 connected to the driving wheel 11 or the driven wheel 4, the axial distance between the driving wheel 11 and the driven wheel 4 is adjusted, that is, the first distance Δh along the axial direction between the first magnet 3 and the second magnet 15 is adjusted, as Figure 3As shown in the figure, magnetic forces and magnetic torques of different magnitudes can be obtained. Specifically, when the driving wheel 11 and the driven wheel 4 are stationary, the driving wheel 11 or the driven wheel 4 can be connected by the first connecting block 18, and the first distance Δh between the first magnet 3 and the second magnet 15 along the axial direction can be adjusted. After the first distance Δh is adjusted; it is also possible to directly adjust the first distance Δh between the first magnet 3 and the second magnet 15 along the axial direction through a lead screw-nut mechanism when the driving wheel 11 and the driven wheel 4 are rotating; achieving the purpose of adjusting without stopping the machine and improving the power transmission efficiency. The lead screw-nut mechanism is arranged outside the non-contact power transmission device. Further, a retaining ring 17 is provided at one end of the lead screw 13 opposite to the relative coupling 12 to limit the moving stroke of the nut 14.

[0045] Specifically, the radial adjustment mechanism is an umbrella rib link mechanism, a star-shaped slider-guide rail mechanism, a scissor expansion mechanism, a magnetic force-driven radial expansion structure, etc. Preferably, the radial adjustment mechanism is a star-shaped slider-guide rail mechanism; as Figure 8 shown, the star-shaped slider-guide rail mechanism includes: a central fixed seat 19, guide rails 20, sliders 21, and a third motor, as well as a second connecting block 22 connected to the slider, etc. The central fixed seat 19 is fixedly arranged at the center of the bottom surface of the first cavity, the third motor is fixedly arranged on the central fixed seat 19, there are multiple guide rails 20 corresponding to the first magnet 3, and the guide rails 20 extend radially from the center to the position where the first magnet 3 is located; a slider 21 is slidably connected to each guide rail 20; the third motor is a linear motor, and the third motor is connected to the slider 21, and the third motor drives the slider 21 to slide along the direction of the guide rail 20; multiple sliders 21 are fixedly connected to the corresponding first magnets 3 through second connecting blocks 22 respectively. By the third motor pushing the sliders 21 to move outward or inward synchronously along the radial guide rails 20, and then the second connecting blocks 22 drive the first magnets 3 to expand or contract synchronously along the radial direction, so as to adjust the second distance Δd between the first magnet 3 and the second magnet 15 along the radial direction, to obtain magnetic forces and magnetic torques of different magnitudes. Specifically, the second distance Δd between the first magnet 3 and the second magnet 15 in the radial direction can be adjusted when the driving wheel 11 and the driven wheel 4 are stationary. It is also possible to directly adjust the second distance Δd between the first magnet 3 and the second magnet 15 along the radial direction through the star-shaped slider-guide rail mechanism when the driving wheel 11 and the driven wheel 4 are rotating; achieving the purpose of adjusting without stopping the machine and improving the power transmission efficiency.

[0046] Specifically, the first distance Δh is the distance between one end of the first magnet 3 close to the input end 1 and one end of the second magnet 15 far from the output end 2; the first distance is not less than zero; the second distance Δd is the distance between the inner circumference of the first magnet 3 and the outer circumference of the second magnet 15; the second distance is not less than zero. Preferably, the first distance is 5 mm and the second distance is 1.5 mm.

[0047] Further, as Figure 8 shown, there are multiple first magnets 3, and the number, shape, and position distribution of the first magnets 3 can be designed with different quantities, shapes, and position distributions according to different scenarios and actual working conditions. The multiple first magnets 3 are evenly arranged along the inner peripheral wall of the first cavity through a slot structure; there are multiple second magnets 15, and the number, shape, and position distribution of the second magnets 15 can be adjusted at any time. The multiple second magnets 15 are evenly arranged along the inner peripheral wall of the second cavity through a slot structure. Preferably, the number of the first magnets 3 and the number of the second magnets 15 are both eight.

[0048] Specifically, the first magnet 3 is a permanent magnet or an electromagnet; the second magnet 15 is a permanent magnet or an electromagnet.

[0049] Specifically, the shape of the first magnet 3 is a sector, triangle, rectangle, cylinder, trapezoid, etc.; preferably, the shape of the first magnet 3 is a sector. The shape of the second magnet 15 is a sector, triangle, rectangle, cylinder, trapezoid, etc.; preferably, the shape of the second magnet 15 is a sector.

[0050] As Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 and Figure 10 shown, the non-contact power transmission device of the present application further includes: a first housing 7 and a second housing; the driving wheel 11 is rotatably connected inside the first housing 7; the driven wheel 4 is rotatably connected inside the second housing. Specifically, the driving wheel 11 is rotatably connected inside the first housing 7 through a first bearing 5, and the driven wheel 4 is rotatably connected inside the second housing through a second bearing 6. The second housing is composed of a first half housing 8 and a second half housing 9 that are snap-fitted together, and the first half housing 8 and the second half housing 9 are connected by fasteners. The driving wheel 11 and the outer ring of the first bearing 5 are fixed through a slot structure inside the first housing 7; the driven wheel 4 and the second bearing 6 are fixed through a slot structure inside the second housing. As Figure 2 shown, the first connecting block 18 can be connected to the driven wheel 4 by connecting to the second half housing 9 on the second housing. Further, four evenly distributed lead screw nut mechanisms are connected and arranged around the second half housing 9, the second motor 10 rotates synchronously, and the nuts 14 move synchronously, thereby driving the first connecting block 18, the second half housing 9, and the driven wheel 4 to move axially. Not only is the power sufficient, but the movement of the driven wheel 4 is more stable.

[0051] As Figure 11As shown, the present application also provides a rotational speed control system, including: the non-contact power transmission device, a rotational speed sensor, and a controller. The controller can be an intelligent controller, which can control the rotational speed of the power component output, and thus can control the rotational speed of the input end 1. A magnetic field interaction force is generated between the driving wheel 11 and the driven wheel 4, so that the driven wheel 4 rotates with the driving wheel 11 under the drive of the non-contact magnetic force.

[0052] The rotational speed sensor is arranged at the output end 2; the controller is in signal connection with the rotational speed sensor, the power component, the second motor 10, and the third motor. The rotational speed control system is adapted to obtain the rotational speed of the output end 2 through the rotational speed sensor, feedback it to the controller, and then control the rotational speed of the power component through the controller, and further affect the rotational speed of the driven wheel 4 through the driving wheel 11 to achieve real-time speed compensation. That is, the rotational speed sensor can detect the rotational speed of the output end 2 in real time and transmit the rotational speed information of the output end 2 to the intelligent controller. The intelligent controller compares the rotational speed information with the preset rotational speed and controls the rotational speed of the first motor in real time, so as to control the rotational speed of the input end 1 in real time, achieve real-time control of the rotational speed of the output end 2, and further achieve real-time speed compensation. The intelligent controller can also affect and control the rotational speed of the output end 2 by controlling the action amplitude of the second motor 10 and the third motor, and then adjusting the first distance Δh along the axial direction between the first magnet 3 and the second magnet 15, and the second distance Δd along the radial direction between the first magnet 3 and the second magnet 15.

[0053] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A non-contact power transmission device, characterized in that, Comprising: A power component, adapted to provide rotational power; A driving wheel (11), the input end (1) of which is connected to the power component; a first cavity is provided at the other end of the driving wheel (11) opposite to the input end (1); a first magnet (3) is disposed around the inner peripheral wall of the first cavity; A driven wheel (4), provided with an output end (2) for outputting power; at least a part of the driven wheel (4) is spaced and sleeved inside the first magnet (3) disposed around; a second cavity is provided at the other end of the driven wheel (4) opposite to the output end (2); a second magnet (15) is disposed around the inner peripheral wall of the second cavity; The non-contact power transmission device is adapted to drive the driven wheel (4) to rotate through the magnetic force and magnetic torque between the first magnet (3) and the second magnet (15), so as to realize power transmission.

2. The non-contact power transmission device according to claim 1, wherein: The first distance along the axial direction between the driving wheel (11) and the driven wheel (4) is adjusted by an axial adjustment mechanism; The second distance along the radial direction between the first magnet (3) and the second magnet (15) is adjusted by a radial adjustment mechanism.

3. The non-contact power transmission device according to claim 2, characterized in that, The axial adjustment mechanism is a lead screw nut mechanism, a telescopic structure or a rack and pinion mechanism; the radial adjustment mechanism is a ribbed link mechanism, a star slider-guide rail mechanism, a scissor telescopic mechanism or a magnetic force-driven radial expansion structure.

4. The non-contact power transmission device according to claim 2, wherein The first distance is the distance between one end of the first magnet (3) close to the input end (1) and one end of the second magnet (15) far from the output end (2); the first distance is not less than zero; the second distance is the distance between the inner periphery of the first magnet (3) and the outer periphery of the second magnet (15); the second distance is not less than zero.

5. The non-contact power transmission device according to claim 4, wherein The first magnet (3) is multiple, and the multiple first magnets (3) are uniformly arranged along the inner peripheral wall of the first cavity through a card slot structure; the second magnet (15) is multiple, and the multiple second magnets (15) are uniformly arranged along the inner peripheral wall of the second cavity through a card slot structure.

6. The non-contact power transmission device according to claim 5, characterized in that, The first distance is 5 mm, the second distance is 1.5 mm; the number of the first magnets (3) and the number of the second magnets (15) are both eight.

7. The non-contact power transmission device according to any one of claims 1-4, characterized in that, The first magnet (3) is a permanent magnet or an electromagnet; the second magnet (15) is a permanent magnet or an electromagnet.

8. The non-contact power transmission device according to any one of claims 1-4, characterized in that, The shape of the first magnet (3) is a sector, a triangle, a rectangle, a cylinder or a trapezoid; the shape of the second magnet (15) is a sector, a triangle, a rectangle, a cylinder or a trapezoid.

9. The non-contact power transmission device according to any one of claims 1-4, characterized in that, Further comprising: A first housing (7), the driving wheel (11) is rotatably connected inside the first housing (7); A second housing, the driven wheel (4) is rotatably connected inside the second housing.

10. A rotational speed control system, characterized in that, Comprising: The non-contact power transmission device according to any one of claims 1-9; A rotational speed sensor, disposed at the output end (2); A controller, which is in signal connection with the rotational speed sensor and the power component; The rotational speed control system is adapted to obtain the rotational speed of the output end (2) through a rotational speed sensor, feedback it to the controller, and then control the rotational speed of the power component through the controller, and further affect the rotational speed of the driven wheel (4) through the driving wheel (11) to achieve real-time speed compensation.

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