A lever-based transmission system

Abstract

The present invention relates to the technical field of power devices, and in particular to a transmission system based on a lever. The transmission system based on a lever comprises a lever group, a power input wheel and a power output wheel; the input end and the output end of the lever group are eccentrically connected to the power input wheel and the power output wheel respectively. The transmission system based on a lever can be used in a power generation device to which a lever is applied, and by utilizing the force-saving principle of a lever, a high-power generator can be driven to generate electricity with a relatively small force, thereby solving the problem in the prior art that the power output device of the power generation device cannot drive the generator to generate electricity because the force outputted by the power output device of the power generation device is relatively small.

Description

Technical Field

[0001] The invention relates to the technical field of power devices, and in particular to a transmission system based on a lever. Background Art

[0002] At present, the development of clean energy has become a development trend. Generators are used in the power generation process of wind power, hydropower, etc.

[0003] The principle of current wind turbines and hydroelectric generators is to convert the mechanical energy of wind, water, etc. into electrical energy, but the conversion efficiency is relatively low. Taking wind turbines as an example, they generally include vertical axis wind turbines and horizontal axis wind turbines. Both of them use wind to drive the impeller to rotate, and then use a multi-stage transmission mechanism to drive the rotor of the generator to rotate to generate electricity. Due to factors such as friction in the transmission process, the transmission efficiency of mechanical energy is low, and the minimum level of wind force is relatively stringent. Generally, a minimum wind speed of about 3m / s is required to drive the wind turbine to generate electricity. For most areas, wind power generation cannot be achieved because the wind speed requirements are not met.

[0004] That is to say, in the existing power generation process, there is a problem that the power output device cannot drive the generator to generate electricity because the output force is small. Summary of the invention

[0005] The purpose of the present invention is to provide a lever-based transmission system, which can solve the problem in the prior art that the power output device cannot drive the generator to generate electricity because the output force is small;

[0006] The present invention provides a lever-based transmission system, which includes a lever group, a power input wheel and a power output wheel;

[0007] The input end and the output end of the lever group are eccentrically connected to the power input wheel and the power output wheel respectively.

[0008] Preferably, the lever-based transmission system comprises two power output wheels and two range extenders, the two power output wheels are respectively a first power output wheel and a second power output wheel, and the two range extenders are respectively a first range extender and a second range extender;

[0009] The lever group includes a push-pull rod, a labor-saving lever and a swing rod;

[0010] One end of the push-pull rod is eccentrically hinged to the power input wheel, and the other end of the push-pull rod is hinged to the power arm of the effort-saving lever;

[0011] The resistance arm of the effort-saving lever is connected to the first power output wheel through the first range extender;

[0012] One end of the swing rod is rotatably connected to the frame of the transmission system, and the other end is connected to the second power output wheel through the second range extender;

[0013] The labor-saving lever and the swing rod are arranged in parallel, and the two are connected by a lever shaft;

[0014] One end of the lever shaft is fixedly connected to the fulcrum of the effort-saving lever, and the other end of the lever shaft is connected to the swing rod, and the length from the connection point of the swing rod and the lever shaft to the end of the lever shaft is the same as the length of the resistance arm;

[0015] The first power output wheel and the second power output wheel are fixed on the same output shaft;

[0016] The labor-saving lever and the swing rod swing between a first position and a second position;

[0017] When the effort-saving lever and the swing arm swing from the first position to the second position, the resistance arm drives the first power output wheel to rotate along the first semicircular trajectory through the first range extender;

[0018] When the effort-saving lever and the swing arm swing from the second position to the first position, the swing arm drives the second power output wheel to rotate along the second semicircular trajectory through the second range extender, and the first semicircular trajectory and the second semicircular trajectory form a circular trajectory.

[0019] Preferably, the range extender is a zipper and a support rod;

[0020] One end of the zipper of the first range extender is hinged to the resistance arm, the other end of the first range extender is eccentrically hinged to the first power output wheel, one end of the support rod of the first range extender is hinged to the frame, and the other end is fixedly hinged to the zipper of the first range extender;

[0021] A reverse positioning wheel is provided on the side of the swing arm away from the second power output wheel, one end of the zipper of the second range extender is hinged to the swing arm after passing around the left positioning wheel, and the other end is eccentrically hinged to the second power output wheel, one end of the support rod of the second range extender is hinged to the frame, and the other end is fixedly hinged to the zipper of the second range extender.

[0022] Preferably, a positioning wheel is provided between the support rod and the power output wheel, and the center of the positioning wheel is flush with the center of the power output wheel.

[0023] Preferably, a flywheel is provided at the middle position of the output shaft;

[0024] The output shaft is provided with a load output wheel, and the load output wheel is connected to the load.

[0025] Preferably, the load is a generator.

[0026] Preferably, it further comprises a power input device, wherein the power input device is connected to the power input wheel via a gear set;

[0027] The gear set comprises a power input pinion and a power input gear which mesh with each other. The power input pinion is connected to the rotating shaft of the power input device, and the power input gear is coaxially arranged with the power input wheel and fixed on the same shaft.

[0028] Beneficial effects:

[0029] The lever-based transmission system can be used in a power generation device to which the lever is applied. By utilizing the force-saving principle of the lever, a large-power generator can be driven to generate electricity with a relatively small force, thereby solving the problem in the prior art that the power output device of the power generation device cannot drive the generator to generate electricity because the force outputted by the generator is relatively small. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a lever-based transmission system provided for a specific embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1: power input wheel, 2: push-pull rod, 3: labor-saving lever, 4: rocker arm, 5: lever shaft, 6: first range extender, 7: second range extender, 8: first power output wheel, 9: second power output wheel, 10: output shaft, 11: zipper; 12: support rod; 13: reverse positioning wheel; 14: positioning wheel; 16: flywheel; 17: load output wheel; 18: generator; 19: power input pinion; 20: power input gear. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1 As shown, this embodiment provides a lever-based transmission system, which includes a lever group, a power input wheel 1 and a power output wheel.

[0038] The input end and the output end of the lever group are eccentrically connected to the power input wheel 1 and the power output wheel respectively.

[0039] In this embodiment, the lever-based transmission system can be used in a power generation device to which the lever is applied. By utilizing the force-saving principle of the lever, a large-power generator can be driven to generate electricity with a relatively small force, thereby solving the problem in the prior art that the power output device of the power generation device cannot drive the generator to generate electricity because the force outputted by the power output device is relatively small.

[0040] Specifically, the lever-based transmission system includes two power output wheels and two range extenders, the two power output wheels are respectively a first power output wheel 8 and a second power output wheel 9, and the two range extenders are respectively a first range extender 6 and a second range extender 7.

[0041] The lever group comprises a push-pull rod 2, a labor-saving lever 3 and a rocker rod 4.

[0042] One end of the push-pull rod 2 is eccentrically hinged to the power input wheel 1 , and the other end of the push-pull rod 2 is hinged to the power arm of the effort-saving lever 3 .

[0043] The resistance arm of the effort-saving lever 3 is connected to the first power output wheel 8 through the first range extender 6 .

[0044] One end of the swing rod 4 is rotatably connected to the frame of the transmission system, and the other end is connected to the second power output wheel 9 through the second range extender 7.

[0045] The labor-saving lever 3 and the rocker arm 4 are arranged in parallel, and the two are connected by a lever shaft 5 .

[0046] One end of the lever shaft 5 is fixedly connected to the fulcrum of the effort-saving lever 3, and the other end of the lever shaft 5 is connected to the rocker rod 4. The length from the connection point between the rocker rod 4 and the lever shaft 5 to the end of the lever shaft 5 is the same as the length of the resistance arm.

[0047] The first power take-off wheel 8 and the second power take-off wheel 9 are fixed on the same output shaft 10 .

[0048] The effort-saving lever 3 and the rocker rod 4 swing between a first position and a second position.

[0049] When the effort-saving lever 3 and the rocker arm 4 swing from the first position to the second position, the resistance arm drives the first power output wheel 8 to rotate along the first semicircular trajectory through the first range extender 6 .

[0050] When the effort-saving lever 3 and the rocker arm 4 swing from the second position to the first position, the rocker arm 4 drives the second power output wheel 9 to rotate along the second semicircular trajectory through the second range extender 7, and the first semicircular trajectory and the second semicircular trajectory form a circular trajectory.

[0051] In the transmission system, the power output wheel needs to be driven to rotate by the resistance arm of the effort-saving lever 3. Since the resistance arm is short, when the size of the power output wheel is large, it is impossible to drive the power output wheel to rotate a full circle. Therefore, the resistance arm is set to drive the power output wheel to rotate by setting a range extender. Although the resistance arm can drive the power output wheel to rotate in certain specific cases through the setting of the range extender. However, when the size of the power output wheel is further increased, the resistance arm cannot drive the power output wheel to rotate a full circle through the range extender. Based on this, the present embodiment adopts the effort-saving lever 3, the swing arm 4 and the first power output wheel 8 and the second power output wheel 9 that are set in linkage. The effort-saving lever 3 drives the first power output wheel 8 to rotate half a circle through the first range extender 6. At this time, the second power output wheel 9 only follows. Thereafter, the swing arm 4 drives the second power output wheel 9 to rotate half a circle through the second range extender 7. At this time, the first power output wheel 8 follows. Under the action of the effort-saving lever 3 and the rocker arm 4, the first power output wheel 8 and the second power output wheel 9 rotate half a circle alternately (half a circle rotation here refers to active rotation, and it can be understood that when one power output wheel actively rotates, the other power output wheel follows), and the two finally realize circular rotation, that is, the larger power output wheel is driven to rotate a full circle through the shorter resistance arm.

[0052] In this embodiment, a structural form of a range extender is provided, and the range extender is a zipper 11 and a support rod 12;

[0053] One end of the first range extender zipper is hinged to the resistance arm, the other end of the first range extender zipper is eccentrically hinged to the first power output wheel, one end of the support rod of the first range extender is hinged to the frame, and the other end is connected to the zipper of the first range extender.

[0054] A reverse positioning wheel 13 is provided on the side of the rocker arm away from the second power output wheel. One end of the zipper of the second range extender is hinged to the rocker arm after passing around the left positioning wheel, and the other end is eccentrically hinged to the second power output wheel. One end of the support rod of the second range extender is hinged to the frame, and the other end is hinged to the zipper of the second range extender.

[0055] The cooperation between the zipper 11 and the support rod 12 is equivalent to increasing the travel of the swing rod and the resistance arm. The longer the support rod 12 is, the longer the travel is, that is, the effect of increasing the range is achieved.

[0056] A positioning wheel 14 is provided between the support rod 11 and the power output wheel, the center of the positioning wheel 14 is flush with the center of the power output wheel, and the zipper 11 passes through the positioning wheel and is connected to the first power output wheel 8 and the second power output wheel 9. The zipper is located below the positioning wheel 14 and moves along the positioning wheel 14.

[0057] When the first power output wheel 8 and the second power output wheel 9 are in a stationary state, the point on the left of the two is point A, and the point on the rightmost is point B.

[0058] The first range extender drives the first power output wheel 8 to rotate from point A to point B, and the second range extender drives the second power output wheel to rotate from point A to point B. In other words, the first power output wheel or the second power output wheel is pulled from point A. If the positioning wheel is not provided, the cable pulls the power output wheel diagonally upward at point A, which may cause the power output wheel to flip. Therefore, the positioning wheel 14 is provided to avoid the flipping of the power output wheel.

[0059] A flywheel 16 is disposed at a middle position of the output shaft 10 .

[0060] The output shaft 10 is provided with a load output wheel 17 , and the load output wheel 17 is connected to a load, which is a generator 18 .

[0061] The lever-based transmission system also includes a power input device, which is connected to the power input wheel 1 through a gear set;

[0062] The gear set includes a power input pinion 19 and a power input gear 20 meshing with each other. The power input pinion 19 is connected to the rotating shaft of the power input device, and the power input gear 20 is coaxially arranged with the power input wheel 1 and fixed on the same shaft.

[0063] The power input device can be a motor, a wind turbine blade, a hydroelectric impeller, a steam turbine, etc., that is, any device that can generate power.

[0064] In order to further illustrate the above-mentioned lever-based transmission system, this embodiment also provides a specific application scenario of the above-mentioned lever-based transmission system.

[0065] In this embodiment, for ease of understanding, the power input device uses an electric motor with a power of 1.1 kilowatts, 220 volts, and 1450 revolutions. A power input pinion 19 is installed on the electric motor, and the power input pinion 19 meshes with a power input gear 20. The diameter of the power input pinion is 100 mm, and the diameter of the power input gear is 500 mm. The power input gear 19 is coaxially mounted with a power input wheel 1 with a diameter of 250 mm. The outer edge of the power input wheel 1 is hinged to one end of the push-pull rod 2 through a fisheye bearing, and the other end of the push-pull rod 2 is hinged to the power arm of the labor-saving lever 3 through a fisheye bearing. The length of the power arm of the labor-saving lever is 500 mm, and the length of the resistance arm is 100 mm. The connection between the power arm and the resistance arm (the fulcrum of the labor-saving lever) is fixed to the transmission system frame through a bearing.

[0066] One end of the zipper of the first range extender 6 is fixed on the resistance arm, and the other end of the zipper passes through the positioning wheel 14 and is hinged to the output wheel. Between the resistance arm and the output wheel, there is a support rod with one end hinged to the frame and the other end hinged to the zipper. The length of the support rod determines the diameter of the output wheel, and the height of the positioning wheel is parallel to the output shaft. The first range extender is to increase the stroke of the resistance arm, that is, to enlarge the swing distance of the resistance arm, so as to increase the diameter of the output wheel. The range extender includes a chain, a support rod, and a positioning wheel. The second range extender also has a reverse positioning wheel on the frame on the left side of the resistance arm.

[0067] The first range extender 6 drives the first power output wheel 8 to rotate along the upper half circle trajectory, and the second range extender 7 drives the second power output wheel to rotate along the lower half circle trajectory, and the upper half circle trajectory and the lower half circle trajectory are 180 degrees inversely symmetrical. The two power output wheels cooperate with the flywheel to complete circumferential rotation, thereby achieving the purpose of increasing the resistance arm range and increasing the output wheel diameter.

[0068] A power output wheel is set respectively at the two ends of the output shaft, and a flywheel is installed in the middle of the shaft. Also a load output wheel is installed on the output shaft, and the load output wheel is a sprocket wheel with a diameter of 100 millimeters, and the chain connects the generator 18.

[0069] The 1.1 kW 220 volt motor has a speed of 1450 rpm and 7.2 Nm. After the power input pinion 19 and the power input gear 20 are changed by 5 to 1, the speed of the power input pinion 19 reaches 290 rpm. Multiplying by 2 is the torque of the power input wheel 1, 7.2*2=14.4 Nm. Multiplying by the lever ratio 5, the force of the resistance arm is 14.4*5=72 Nm. The output wheel diameter of the range extender is 300 mm, which is 6 times the resistance arm stroke of 50 mm, 72*6=432 Nm torque. It meets the torque requirement of 95 Nm of the 3 kW generator. At the same time, the 1450 rpm motor changes from 1450 to 290 rpm after the speed ratio of 5 to 1, which meets the generator's 3 kW 95 Nm 300 rpm requirement. The lever is a force transmission tool, but it can convert 100% of the force (excluding mechanical loss) into torque by pulling the range extender.

[0070] It should be noted that the above transmission system can be used alone or in series, such as two, three or four groups, to multiply the torque. The generator power becomes larger but the motor power can remain unchanged, so that a small power motor can drive a large generator through mechanical transmission.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lever-based transmission system, characterized in that: It includes a lever group, a range extender, a power input wheel and a power output wheel; The input end and the output end of the lever group are eccentrically connected to the power input wheel and the power output wheel respectively; The lever-based transmission system includes two power output wheels and two range extenders, the two power output wheels are respectively a first power output wheel and a second power output wheel, and the two range extenders are respectively a first range extender and a second range extender; The lever group includes a push-pull rod, a labor-saving lever and a swing rod; One end of the push-pull rod is eccentrically hinged to the power input wheel, and the other end of the push-pull rod is hinged to the power arm of the effort-saving lever; The resistance arm of the effort-saving lever is connected to the first power output wheel through the first range extender; One end of the swing rod is rotatably connected to the frame of the transmission system, and the other end is connected to the second power output wheel through the second range extender; The labor-saving lever and the swing rod are arranged in parallel, and the two are connected by a lever shaft; One end of the lever shaft is fixedly connected to the fulcrum of the effort-saving lever, and the other end of the lever shaft is connected to the swing rod, and the length from the connection point of the swing rod and the lever shaft to the end of the lever shaft is the same as the length of the resistance arm; The first power output wheel and the second power output wheel are fixed on the same output shaft; The labor-saving lever and the swing rod swing between a first position and a second position; When the effort-saving lever and the swing arm swing from the first position to the second position, the resistance arm drives the first power output wheel to rotate along the first semicircular trajectory through the first range extender; When the effort-saving lever and the swing arm swing from the second position to the first position, the swing arm drives the second power output wheel to rotate along the second semicircular trajectory through the second range extender, and the first semicircular trajectory and the second semicircular trajectory form a circular trajectory.

2. The lever-based transmission system of claim 1, wherein: The range extender is a zipper and a support rod; One end of the zipper of the first range extender is hinged to the resistance arm, the other end of the first range extender is eccentrically hinged to the first power output wheel, one end of the support rod of the first range extender is hinged to the frame, and the other end is hinged to the zipper of the first range extender; A reverse positioning wheel is provided on the side of the swing arm away from the second power output wheel, one end of the zipper of the second range extender is hinged to the swing arm after passing around the left positioning wheel, and the other end is eccentrically hinged to the second power output wheel, one end of the support rod of the second range extender is hinged to the frame, and the other end is fixedly hinged to the zipper of the second range extender.

3. The lever-based transmission system of claim 2, wherein: A positioning wheel is arranged between the support rod and the power output wheel, and the center of the positioning wheel is flush with the center of the power output wheel.

4. The lever-based transmission system of claim 1, wherein: A flywheel is arranged at the middle position of the output shaft; The output shaft is provided with a load output wheel, and the load output wheel is connected to the load.

5. The lever-based transmission system of claim 4, wherein: The load is a generator.

6. The lever-based transmission system of claim 1, wherein: It also includes a power input device, which is connected to the power input wheel through a gear set; The gear set comprises a power input pinion and a power input gear which mesh with each other. The power input pinion is connected to the rotating shaft of the power input device, and the power input gear is coaxially arranged with the power input wheel and fixed on the same shaft.

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