Zero-turn hybrid lawn mower

Abstract

The utility model discloses a zero -steering hybrid mower belongs to agricultural machinery field, including the frame, is equipped with the cutter assembly in the frame downside, is equipped with two running wheels in the frame front side, is equipped with two drive wheels and two groups of drive motor in the frame rear side, two groups of drive motor are connected with two drive wheels power respectively, is equipped with the engine and generator on the frame, and the crankshaft one end of engine reaches the frame downside and is connected with cutter assembly power through transmission subassembly, the other end is connected with generator rotor power, and the output terminal of generator is connected with the input terminal electricity of battery after adapter, and the output terminal of battery is connected with drive motor electricity. The beneficial effect of this scheme is: cancel the conventional hydraulic rear axle, adopt two groups of drive motor to drive the wheel respectively, also can carry out zero -steering, and the structure is simpler, and the manufacturing cost is lower, and engine drives cutter assembly movement, simultaneously drives generator power generation and provides the energy for drive motor, reduces the energy waste, reduces the use cost.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, specifically to a zero-steering hybrid lawnmower. Background Technology

[0002] A lawnmower is a mechanical device used to trim lawns, gardens, or other vegetated areas. It includes small handheld lawnmowers and large lawnmowers with a driver's seat. Large lawnmowers typically consist of a frame, wheels, wheel drive components, cutting blades, and blade drive components. The operator drives the lawnmower forward and backward, and the blade drive components rotate the blades to cut the grass. The speed and design of the blades directly affect the mowing effect.

[0003] In the existing technology, the rear wheel of large lawnmowers is usually connected by a hydraulic rear axle, and the wheel drive component and the blade drive component need to be powered separately, which can easily lead to energy waste and increase the cost of use. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to reduce the manufacturing cost and operating cost of lawnmowers.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a zero-steering hybrid lawn mower, including a frame, a cutter assembly on the lower side of the frame, two wheels on the front side of the frame, two drive wheels and two sets of drive motors on the rear side of the frame, the two sets of drive motors being poweredly connected to the two drive wheels respectively, for driving the two drive wheels to rotate respectively; The frame is equipped with an engine and a generator. One end of the crankshaft of the engine extends to the underside of the frame and is powered to the cutter assembly through a transmission component to drive the cutter assembly. The other end is powered to the generator rotor. The output terminal of the generator is electrically connected to the input terminal of the battery through an adapter. The output terminal of the battery is electrically connected to the drive motor.

[0006] The advantages of this solution are: eliminating the conventional hydraulic rear axle and using two sets of drive motors to drive the wheels respectively, which can still achieve zero steering, with a simpler structure and lower manufacturing cost; in addition, the engine drives the cutting blade assembly to move, while driving the generator to generate electricity to provide energy for the drive motor, reducing energy waste and lowering the cost of use.

[0007] Preferably, two rear axle mounting plates are fixedly provided on the rear side of the vehicle frame, and two drive motors are respectively mounted on the two rear axle mounting plates. A reducer is also provided on each of the two rear axle mounting plates. The output shaft of the drive motor is poweredly connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the axle of the drive wheel.

[0008] The advantages of adopting the above preferred solution are: the reducer and drive motor are fixed to the frame by the rear axle mounting plate, and the output of the drive motor is transmitted to the drive wheel through the reducer, thereby reducing the speed and increasing the torque.

[0009] Preferably, the two reducers are fixedly connected by two connecting rods.

[0010] The advantages of adopting the above-mentioned preferred scheme are: the two reducers are connected to each other to form a stable frame structure, reducing the impact of bumps and vibrations.

[0011] Preferably, the cutter assembly includes a protective cover, which is fixedly mounted on the lower side of the frame. Several blade shafts are vertically rotatably mounted inside the protective cover. The bottom end of each blade shaft is provided with a blade for cutting grass, and the top end of each blade shaft passes through the protective cover, extends to the upper side of the protective cover, and is fixedly provided with a driven wheel. The crankshaft of the engine is fixedly equipped with a drive wheel at one end extending to the underside of the frame. The drive wheel and the driven wheel are connected by a drive belt or a drive chain.

[0012] The advantages of adopting the above preferred solution are: the engine drives the cutter assembly, which is connected by a transmission belt or transmission chain, has a simple structure, and can transmit power over long distances.

[0013] Preferably, there are two cutter shafts, which are located close to the left and right sides of the frame and staggered in front and behind. When the two blades rotate, the sides of their maximum outer contours that are close to each other intersect by 10mm on the front projection surface of the frame.

[0014] The advantages of adopting the above-mentioned preferred scheme are: the two blade shafts are set on the left and right to maximize the area that can be cut grass, and the two blades overlap each other in the middle of their rotation projection to ensure that the grass is cut cleanly and no residue is left in the middle.

[0015] Preferably, a guide groove is fixedly provided on one side of the protective cover.

[0016] The advantage of adopting the above-mentioned preferred solution is that it guides the chopped grass to one side, making it easier to collect.

[0017] Preferably, the generator includes a stator and a rotor, and one end of the crankshaft of the engine extends into the generator and is fixedly connected to the rotor, and extends to the other side of the generator where a flywheel is fixedly mounted.

[0018] The beneficial effects of adopting the above-mentioned preferred scheme are: the engine drives the rotor to rotate, which in turn drives the flywheel to rotate. The flywheel stores energy during the engine's power stroke and releases energy during the non-power stroke through its huge moment of inertia, thereby balancing the crankshaft speed and reducing periodic torque fluctuations.

[0019] Preferably, two brackets are fixedly provided on the front side of the vehicle frame, and a rotating shaft is vertically rotatably provided on the two brackets. A portal frame is fixedly provided at the bottom end of the rotating shaft, and the driving wheel is rotatably installed in the portal frame.

[0020] The beneficial effect of adopting the above preferred solution is that when the frame turns, the pivot rotates synchronously, so that the traveling wheels can be used as swivel wheels. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram of the overall design of this utility model; Appendix Figure 2 for Figure 1 Enlarged view of point A; Appendix Figure 3 This is a schematic diagram of the battery of this utility model; Appendix Figure 4 This is a schematic diagram of the cutting blade assembly of this utility model; Appendix Figure 5 This is a schematic diagram of the rear axle fixing plate of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Cutter assembly; 3. Wheel; 4. Drive wheel; 5. Drive motor; 6. Engine; 7. Generator; 8. Battery; 9. Rear axle mounting plate; 10. Reducer; 11. Connecting rod; 12. Drive wheel; 13. Bracket; 14. Shaft; 15. Gantry frame; 16. Crankshaft; 17. Flywheel; 201. Protective cover; 202. Cutter shaft; 203. Cutting blade; 204. Guide groove; 701. Stator. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] Example 1 like Figures 1 to 4As shown, a zero-steering hybrid lawnmower includes a frame 1, a cutter assembly 2 on the lower side of the frame 1, two wheels 3 on the front side of the frame 1, two drive wheels 4 and two sets of drive motors 5 on the rear side of the frame 1, and the two sets of drive motors 5 are respectively poweredly connected to the two drive wheels 4 to drive the two drive wheels 4 to rotate. The frame 1 is equipped with an engine 6 and a generator 7. One end of the crankshaft 16 of the engine 6 extends to the lower side of the frame 1 and is poweredly connected to the cutter assembly 2 through a transmission component to drive the cutter assembly 2 to move; the other end is poweredly connected to the rotor of the generator 7. The output terminal of the generator 7 is electrically connected to the input terminal of the battery 8 through an adapter. The output terminal of the battery 8 is electrically connected to the drive motor 5.

[0025] In this embodiment, a zero-steering lawnmower refers to a lawnmower in which the two drive wheels 4 can be controlled independently. The operator controls the speed and direction of the left and right drive wheels 4 respectively through the joystick. When the two drive wheels 4 rotate at the same speed and in the same direction, the lawnmower travels in a straight line. When the two drive wheels 4 rotate in opposite directions, the lawnmower can rotate in place, that is, turn around with zero turning radius. When one drive wheel 4 is stationary and the other drive wheel 4 is rotating, the lawnmower rotates around the stationary drive wheel 4.

[0026] Specifically, after the operator starts the engine 6, the piston of the engine 6 reciprocates, driving the crankshaft 16 to start rotating. One end of the crankshaft 16 drives the cutter assembly 2 to rotate and cut grass, while the other end drives the rotor of the generator 7 to rotate and generate electricity. The current from the generator 7 is transmitted to the battery 8 for storage through an adapter (the adapter can be any one or more of a rectifier / voltage regulator / inverter; the generator's power generation, rectification, voltage regulation, and storage are existing technologies and will not be elaborated here). The battery 8 supplies power to the two sets of drive motors 5. The operator operates the drive motors 5 to rotate or stop, driving the drive wheel 4 to rotate or stop, achieving zero steering of the lawnmower, reducing energy waste, and lowering operating costs.

[0027] Example 2 like Figure 5 As shown, based on Embodiment 1, two rear axle fixing plates 9 are fixedly provided on the rear side of the frame 1, and two drive motors 5 are respectively installed on the two rear axle fixing plates 9. A reducer 10 is also provided on each of the two rear axle fixing plates 9. The output shaft of the drive motor 5 is poweredly connected to the input shaft of the reducer 10, and the output shaft of the reducer 10 is fixedly connected to the wheel axle of the drive wheel 4.

[0028] In this embodiment, the rear axle fixing plate 9 is L-shaped and has two sets of waist-shaped holes on it, which facilitates the fixed connection with the frame 1 and the fine adjustment of its position. The reducer 10 and the drive motor 5 are fixed on the frame 1 through the rear axle fixing plate 9, which has a simple structure.

[0029] like Figure 4 As shown, the two reducers 10 are fixedly connected by two connecting rods 11.

[0030] In this embodiment, the two reducers 10 are connected to each other to form a stable frame structure, reducing the impact of the lawnmower's vibration during operation.

[0031] like Figure 4 As shown, the cutter assembly 2 includes a protective cover 201, which is fixedly installed on the lower side of the frame 1. Several blade shafts 202 are vertically rotatably installed inside the protective cover 201. The bottom end of the blade shaft 202 is provided with a blade 203 for cutting grass, and the top end of the blade shaft 202 passes through the protective cover 201 and extends to the upper side of the protective cover 201 and is fixedly provided with a driven wheel. The crankshaft 16 of the engine 6 extends to one end of the frame 1 and is fixedly equipped with a drive wheel 12. The drive wheel 12 and the driven wheel are connected by a drive belt or a drive chain.

[0032] In this embodiment, the transmission assembly includes a driven wheel and a driving wheel 12. The crankshaft 16 of the engine 6 drives the driving wheel 12 to rotate. The driving wheel 12 drives the driven wheel to rotate through a transmission belt or transmission chain. The driven wheel drives the blade shaft 202 to rotate. The blade shaft 202 drives the blade 203 to cut grass.

[0033] When the driving wheel 12 and the driven wheel are connected by a transmission belt, they act as pulleys, enabling long-distance power transmission. If the cutter shaft 202 and the blade 203 become unable to rotate due to weeds, the power will be released through slippage, preventing jamming and damage to the engine 6. When the driving wheel 12 and the driven wheel are connected by a transmission chain, they act as sprockets, providing a precise transmission ratio suitable for various harsh working conditions. This solution primarily uses a transmission belt connection method.

[0034] like Figure 4 As shown, there are two cutter shafts 202. The two cutter shafts 202 are located close to the left and right sides of the frame 1 and are staggered in front and behind. When the two blades 203 rotate, the sides of their maximum outer contours that are close to each other intersect by 10mm on the front projection surface of the frame 1.

[0035] In this embodiment, the two blade shafts 202 are positioned on the left and right sides to maximize the cutting range. When the shadows of the two blades 203 rotate, they intersect by 10mm on the front projection surface of the frame 1. This ensures that the cutting range between the two blades 203 overlaps when the lawnmower moves forward, ensuring that the grass is cut cleanly without leaving any residue.

[0036] like Figure 3 and Figure 4 As shown, a guide groove 204 is fixedly provided on one side of the protective cover 201.

[0037] In this embodiment, the protective cover 201 is made of plastic, and the guide groove 204 is integrally formed with the protective cover 201. The opening of the guide groove 204 is parallel to the tangent of the rotation direction of the blade 203. The effect is that the shredded grass can fly down towards the guide groove 204 under the action of centrifugal force, which is convenient for collection.

[0038] like Figure 1 and Figure 2 As shown, the generator 7 includes a stator 701 and a rotor. One end of the crankshaft 16 of the engine 6 extends into the generator 7 and is fixedly connected to the rotor, and a flywheel 17 is fixedly installed on the other side of the generator 7.

[0039] In this embodiment, the engine 6 is placed vertically, with its crankshaft 16 axis perpendicular to the ground, and the lower end of the crankshaft 16 is fixedly connected to the drive wheel 12; the generator 7 is installed on the upper side of the engine 6, with the upper end of the crankshaft 16 passing through the generator 7 and a flywheel 17 fixedly installed at the top.

[0040] The stator 701 of the generator 7 is cylindrical, with several slots evenly spaced around the axis on its inner circumference. Coil windings are installed in the slots. The rotor is located inside the stator 701 and is coaxial with the stator 701 (not shown in the figure). The rotor is also equipped with coil windings. The crankshaft 16 extends into the outer wall of the generator 7 and is fixedly connected to the rotor. When the crankshaft 16 rotates, it drives the rotor. The rotor cuts the magnetic field lines of the coil windings of the stator 701 to generate current and realize power generation. The rotation of the crankshaft 16 also drives the flywheel 17 to rotate. The flywheel 17 stores energy during the power operation phase of the engine 6 through its huge rotational inertia and releases energy during the non-power operation phase, thereby balancing the speed of the crankshaft 16 and reducing periodic torque fluctuations.

[0041] A dust cover and a fan (not shown in the figure) are also installed on the upper side of generator 7.

[0042] like Figure 1 As shown, two brackets 13 are fixedly provided on the front side of the frame 1, and a rotating shaft 14 is vertically rotatably provided on the two brackets 13. A portal frame 15 is fixedly provided at the bottom end of the rotating shaft 14, and the walking wheel 3 is rotatably installed in the portal frame 15.

[0043] In this embodiment, when the frame 1 is driven by the drive wheel 4 to turn left or right, the pivot 14 rotates synchronously to ensure that the traveling wheel 3 always faces the forward direction of the frame 1, and can be used as a swivel wheel.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A zero-steering hybrid lawnmower, comprising a frame (1), with a cutter assembly (2) disposed on the underside of the frame (1), characterized in that, The frame (1) has two wheels (3) on the front side and two drive wheels (4) and two sets of drive motors (5) on the rear side. The two sets of drive motors (5) are connected to the two drive wheels (4) respectively to drive the two drive wheels (4) to rotate. The frame (1) is equipped with an engine (6) and a generator (7). One end of the crankshaft of the engine (6) extends to the lower side of the frame (1) and is connected to the cutter assembly (2) through a transmission assembly to drive the cutter assembly (2) to move. The other end is connected to the rotor of the generator (7). The output terminal of the generator (7) is connected to the input terminal of the battery (8) through an adapter. The output terminal of the battery (8) is connected to the drive motor (5).

2. The zero-steering hybrid lawnmower according to claim 1, characterized in that, Two rear axle mounting plates (9) are fixedly provided on the rear side of the frame (1). Two drive motors (5) are respectively mounted on the two rear axle mounting plates (9). A reducer (10) is also provided on each of the two rear axle mounting plates (9). The output shaft of the drive motor (5) is poweredly connected to the input shaft of the reducer (10). The output shaft of the reducer (10) is fixedly connected to the wheel axle of the drive wheel (4).

3. The zero-steering hybrid lawnmower according to claim 2, characterized in that, The two reducers (10) are fixedly connected by two connecting rods (11).

4. The zero-steering hybrid lawnmower according to claim 1, characterized in that, The cutter assembly (2) includes a protective cover (201), which is fixedly mounted on the lower side of the frame (1). Several blade shafts (202) are vertically rotatably mounted inside the protective cover (201). The bottom end of the blade shaft (202) is provided with a blade (203) for cutting grass. The top end of the blade shaft (202) passes through the protective cover (201) and extends to the upper side of the protective cover (201) and is fixedly provided with a driven wheel. The crankshaft of the engine (6) extends to one end of the frame (1) and is fixedly provided with a drive wheel (12). The drive wheel (12) and the driven wheel are connected by a drive belt or a drive chain.

5. The zero-steering hybrid lawnmower according to claim 4, characterized in that, There are two cutter shafts (202). The two cutter shafts (202) are close to the left and right sides of the frame (1) respectively and are staggered in front and back. When the two blades (203) rotate, the sides of their maximum outer contours that are close to each other have a 10mm intersection on the front projection surface of the frame (1).

6. The zero-steering hybrid lawnmower according to claim 5, characterized in that, A guide groove (204) is fixedly provided on one side of the protective cover (201).

7. The zero-steering hybrid lawnmower according to claim 1, characterized in that, The generator (7) includes a stator (701) and a rotor. One end of the crankshaft of the engine (6) extends into the generator (7) and is fixedly connected to the rotor. The crankshaft extends to the other side of the generator (7) and is fixedly provided with a flywheel (17).

8. The zero-steering hybrid lawnmower according to any one of claims 1 to 7, characterized in that, Two brackets (13) are fixedly provided on the front side of the vehicle frame (1). A rotating shaft (14) is vertically rotatably provided on the two brackets (13). A portal frame (15) is fixedly provided at the bottom end of the rotating shaft (14). The walking wheel (3) is rotatably installed in the portal frame (15).

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