Wide-width riding type mower

Abstract

A wide-width riding type lawn mower comprises: a vehicle body having a built-in rotation driving member; the bottom cover is arranged at the bottom of the vehicle body and provided with a containing cavity, and the containing cavity is provided with a discharging opening; the driving shafts are rotationally connected to the bottom cover, the at least two driving shafts are arranged at intervals, transmission wheels are arranged at the upper ends of the driving shafts, and cutting blades are arranged at the lower ends of the driving shafts; at least one intermediate shaft is arranged between any two adjacent driving shafts, is rotationally connected to the bottom cover, and is provided with a tensioning wheel and an impeller; the annular transmission belt sequentially winds all the transmission wheels and the tensioning wheel from the output end of the rotary driving part; a flow guide cover is arranged at the position, between the adjacent driving shafts, of the containing cavity, the flow guide cover comprises an air inlet and an air outlet, the impeller rotates to drive air to be blown to the discharging opening through the flow guide cover, and therefore forage at the position between the adjacent driving shafts is blown to the discharging opening. And the discharging effect of the cut forage is effectively improved on the premise that extra power does not need to be increased.

Description

Technical Field

[0001] This invention relates to the technical field of lawnmowers, and more specifically to a wide-width riding lawnmower. Background Technology

[0002] Ride-on lawnmowers, as efficient landscaping maintenance equipment, are commonly used in gardens, municipal green spaces, and large lawns where large-area operations are required. The main structure of a ride-on lawnmower includes a vehicle body for the operator to drive and a base cover located at the bottom of the vehicle body. The base cover has an opening facing downwards, and multiple cutting blades are arranged along the width of the vehicle body within this cavity. During mowing, the operator drives the vehicle forward, and the grass above the cutting blades is cut by the high-speed rotating blades. Under the centrifugal airflow generated by the rotating blades, the grass moves towards the discharge port located on one side of the base cover, and is ultimately discharged through the discharge port to a grass collection device or directly spread onto the lawn surface.

[0003] The "width" of a ride-on lawnmower, also known as "cutting width," refers to the total lateral width that all the blades can effectively cut during a single operation. Because ride-on lawnmowers often cover a large area, high cutting efficiency is required. To improve efficiency, a common practice is to increase the width of the lawnmower, which can be achieved by increasing the size of the cutting blades, widening the spacing between adjacent blades, or simply increasing the number of cutting blades.

[0004] However, as the number of cutting blades increases, and the size of individual blades and the spacing between blades also increase, the distance the hay travels from the cut point to the discharge port also increases accordingly. During this process, the airflow generated by the rotation of the cutting blades undergoes significant diffusion and attenuation within the gap between adjacent blades, resulting in a significantly insufficient airflow pushing force in this area. This leads to a lack of sufficiently strong and directional airflow to continuously push the hay towards the discharge port after it is cut, affecting the mower's operating efficiency and hay collection effect. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that in the prior art, the airflow generated by the cutting blades of a lawnmower diffuses and weakens in the gap area, resulting in insufficient pushing force and preventing the cut grass from being discharged to the discharge port in a timely and smooth manner.

[0006] To address the above problems, the present invention provides a wide-width riding lawnmower, comprising: The vehicle body contains a built-in rotary drive component; A bottom cover located at the bottom of the vehicle body, the bottom cover having a downward-opening receiving cavity, and a discharge port on the left or right side of the receiving cavity; A drive shaft is rotatably connected to the bottom cover with a vertical axis. There are at least two drive shafts arranged at intervals in the left-right direction. The upper end of the drive shaft is provided with a transmission wheel and the lower end extends to the lower part of the receiving cavity. The lower end of the drive shaft is provided with a cutting blade. At least one intermediate shaft is provided between any two adjacent drive shafts. The intermediate shaft is rotatably connected to the bottom cover with the vertical axis as the axis. The intermediate shaft is provided with a tension wheel at the same height as the drive wheel and an impeller located below the tension wheel. An annular drive belt, starting from the output end of the rotary drive component, sequentially wraps around all the drive pulleys and tension pulleys; The receiving cavity is provided with a flow guide shroud located between adjacent drive shafts. The flow guide shroud is located at the upper part of the receiving cavity and includes an air inlet connected to the lower part of the corresponding impeller and an air outlet facing the discharge port. The impeller drives the gas through the flow guide shroud to the discharge port by rotating.

[0007] Compared with existing technologies, the above solution adds an intermediate shaft between adjacent drive shafts. The tensioning wheel on the intermediate shaft can tension the transmission belt between adjacent drive wheels. On the one hand, this achieves better power transmission from the transmission belt to the drive wheels. On the other hand, the tensioning wheel can also rotate under the action of the transmission belt, which in turn causes the intermediate shaft and impeller to rotate. The rotation of the impeller can drive the gas through the guide shroud to blow towards the discharge port, thereby blowing the grass between adjacent drive shafts towards the discharge port. This effectively improves the discharge effect of the cut grass without adding additional power.

[0008] In an improved embodiment, the intermediate shaft is rotatably connected to the upper side of the base cover via bearings. The tensioning wheel and impeller are located at the upper and lower parts of the intermediate shaft, respectively. The base cover has a ventilation hole extending downwards into the receiving cavity, corresponding to the position below the impeller. This ventilation hole is connected to the air inlet of the guide shroud. When the impeller rotates, the air around the impeller enters the air inlet of the guide shroud through the ventilation hole, then exits from the air outlet and flows towards the discharge port, forming a smooth gas flow path. Simultaneously, the upper area of ​​the base cover typically contains heat generated by mechanical transmission; therefore, the impeller can guide the heat from this area to the guide shroud and discharge it, achieving heat dissipation.

[0009] In an improved embodiment, the flow guide is hemispherical, with its end face facing upward and connected to the inner top wall of the receiving cavity, and its spherical side facing downward. The air inlet is located on the upper side of the flow guide, and the air outlet is elongated and located on the side of the flow guide facing the discharge port. By designing the flow guide as hemispherical, the obstruction effect on the cut forage can be effectively reduced, allowing the forage to be blown more smoothly towards the discharge port.

[0010] In an improved embodiment, the receiving cavity is provided with sleeves that are fitted onto the outside of the drive shaft one by one. The upper end of the sleeve is connected to the inner top wall of the receiving cavity and the lower end extends to the lower part of the receiving cavity. The upper end of the drive shaft is rotatably connected to the bottom cover through a bearing, and the lower end is rotatably connected to the lower side of the sleeve through a bearing. The sleeves can effectively protect the drive shaft and prevent grass from getting tangled in the drive shaft.

[0011] In an improved embodiment, the lower end of the drive shaft is connected to the middle of the corresponding cutting blade, and the two ends of the cutting blade are respectively provided with blade segments, and the cutting edges of the two blade segments are opposite to each other, so that when the drive shaft rotates, the blade segments at both ends of the cutting blade can perform efficient grass cutting operations.

[0012] In an improved embodiment, the blade section has an upwardly curved guide vane on the back side, which allows the cut grass to move to the upper part of the receiving cavity under the action of the guide vane, and then move towards the discharge port more effectively.

[0013] In an improved embodiment, the rotary drive includes a drive wheel and a motor / engine for driving the drive wheel to rotate. The transmission belt passes sequentially around all the drive wheels and tension wheels from the drive wheel, so that the rotational power of the drive wheel is transmitted sequentially to all the drive wheels and tension wheels through the transmission belt. The structure is simple and reliable.

[0014] In an improved embodiment, the diameter of the tensioning wheel is smaller than that of the drive wheel, thereby allowing the tensioning wheel to rotate at a higher speed than the drive wheel, thus achieving a higher impeller speed.

[0015] In an improved design, there are three drive shafts, with the middle drive shaft positioned in front of the left and right drive shafts, resulting in a more scientific and rational layout. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the upper side of a wide-mounted riding lawnmower. Figure 2 This is a schematic diagram of the lower side of a wide-width riding lawnmower; Figure 3 A schematic diagram of the upper side of the underbody of a wide-mounted riding lawnmower; Figure 4 A schematic diagram of the underside of the cover of a wide-mounted riding lawnmower; Figure 5 for Figure 4 Cross-sectional view of section AA in the middle; Figure 6 for Figure 4 Schematic diagram of the BB section line.

[0017] Explanation of reference numerals in the attached figures: 1. Vehicle body; 2. Rotary drive component; 21. Drive wheel; 3. Base cover; 31. Receiving cavity; 32. Discharge port; 33. Ventilation hole; 4. Drive shaft; 41. Cutting blade; 411. Blade section; 412. Guide vane; 42. Drive wheel; 5. Intermediate shaft; 51. Tensioner wheel; 52. Impeller; 6. Drive belt; 7. Draft shield; 71. Air inlet; 72. Air outlet; 8. Sleeve. Detailed Implementation

[0018] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0020] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Please see Figures 1-6 An embodiment of the present invention provides a wide-width riding lawnmower, comprising: The vehicle body 1 has a built-in rotary drive component 2; A bottom cover 3 is provided at the bottom of the vehicle body 1. The bottom cover 3 has a downward-opening receiving cavity 31. A discharge port 32 is provided on the left or right side of the receiving cavity 31. In this embodiment, the discharge port 32 is located on the right side of the receiving cavity 31. The drive shaft 4 is rotatably connected to the bottom cover 3 with the vertical axis as the axis. There are at least two drive shafts 4, which are arranged at intervals in the left and right direction. The upper end of the drive shaft 4 is provided with a transmission wheel 42 and the lower end extends to the lower part of the receiving cavity 31. The lower end of the drive shaft 4 is provided with a cutting blade 41. At least one intermediate shaft 5 is provided between any two adjacent drive shafts 4. The intermediate shaft 5 is rotatably connected to the bottom cover 3 with the vertical axis as the axis. The intermediate shaft 5 is provided with a tension wheel 51 at the same height as the transmission wheel 42 and an impeller 52 located below the tension wheel 51. The annular transmission belt 6 passes sequentially around all the transmission wheels 42 and the tension wheel 51 from the output end of the rotary drive 2; The cavity 31 is provided with a flow guide 7 located between adjacent drive shafts 4. The flow guide 7 is located at the upper part of the cavity 31 and includes an air inlet 71 connected to the lower part of the corresponding impeller 52 and an air outlet 72 facing the discharge port 32. The impeller 52 drives the gas to be blown towards the discharge port 32 through the flow guide 7 by rotating.

[0023] The above solution adds an intermediate shaft 5 between adjacent drive shafts 4. The tensioning wheel 51 on the intermediate shaft 5 can tension the transmission belt 6 between adjacent transmission wheels 42. On the one hand, it realizes better power transmission from the transmission belt 6 to the transmission wheels 42. On the other hand, the tensioning wheel 51 can also rotate under the action of the transmission belt 6, which in turn causes the intermediate shaft 5 and the impeller 52 to rotate. The impeller 52, through rotation, can drive the gas through the guide shroud 7 to blow towards the discharge port 32, thereby blowing the grass between adjacent drive shafts 4 towards the discharge port 32. This effectively improves the discharge effect of the cut grass without adding extra power.

[0024] In this embodiment, the term "wide-width riding lawnmower" refers to the wider cutting width of the riding lawnmower. The specific cutting width is determined by the number and size of the cutting blades 41. It should be understood that the number of drive shafts 4 can be designed according to the required number of cutting blades 41, such as two, three, or four. In this embodiment, with the driving direction of the vehicle body 1 as the front-to-back direction, all drive shafts 4 are arranged at intervals along the left-to-right direction. Each drive shaft 4 has a cutting blade 41 at its lower end. Of course, the cutting blades 41 should not interfere with each other when rotating. When the cutting blades 41 rotate under the drive of the drive shafts 4, they generate an upward airflow. This airflow carries the cut grass upwards and, guided by the top wall of the receiving cavity 31, moves it towards the discharge port 32. This part is prior art and will not be described in detail here.

[0025] In this embodiment, there are three drive shafts 4, with the middle drive shaft 4 located in front of the left and right drive shafts 4, thus forming a triangular arrangement, which is more scientific and reasonable.

[0026] In addition, an intermediate shaft 5 is provided between any two adjacent drive shafts 4. The intermediate shaft 5 is rotatably connected to the base cover 3 through bearings. The tension wheel 51 on the intermediate shaft 5 is engaged with the transmission belt 6 between two adjacent transmission wheels 42.

[0027] Combination Figure 6 As shown, in this embodiment, the upper end of the intermediate shaft 5 is rotatably connected to the upper side of the bottom cover 3 via a bearing. The tension wheel 51 and the impeller 52 are located at the upper and lower parts of the intermediate shaft 5, respectively. The bottom cover 3 is provided with a ventilation hole 33 that extends downward to the receiving cavity 31 at the position below the impeller 52. The ventilation hole 33 is connected to the air inlet 71 of the guide shroud 7.

[0028] When the impeller 52 rotates, the air around the impeller 52 enters the air inlet 71 of the guide shroud 7 through the ventilation holes 33, and then exits from the outlet 72 and flows to the discharge port 32, forming a smooth gas flow path and achieving efficient heat dissipation. In addition, this design has another advantage: since the upper area of ​​the base shroud 3 usually contains heat generated by the engine / motor and mechanical transmission, by opening the ventilation holes 33 in the base shroud 3, the impeller 52 can guide the heat in the upper area of ​​the base shroud 3 through the airflow to the outlet 72 of the guide shroud 7 and discharge it, thereby effectively reducing the heat accumulation in the upper area of ​​the base shroud 3.

[0029] Combination Figure 2 As shown, the shape of the guide shroud 7 can be designed as needed, such as a long strip or a cylinder. In this embodiment, the guide shroud 7 is a bowl-shaped hemispherical shape. The end face of the guide shroud 7 faces upward and is connected to the inner top wall of the receiving cavity 31 by bolts or welding. The spherical side of the guide shroud 7 faces downward. The air inlet 71 is located on the upper side of the guide shroud 7, and the air outlet 72 is a long strip along the horizontal direction and is located on the side of the guide shroud 7 facing the discharge port 32. By designing the guide shroud 7 as a hemispherical shape, on the one hand, it is beneficial to guide the airflow generated by the impeller 52 more smoothly to the air outlet 72. On the other hand, the spherical surface on the lower side of the guide shroud 7 can effectively reduce the obstruction of the cut grass, so that the grass is blown more smoothly to the discharge port 32. In addition, the long strip-shaped air outlet 72 facilitates the faster discharge of the airflow in the guide shroud 7, improving the pushing effect on the grass.

[0030] Combination Figure 5As shown, as an improvement to this embodiment, the receiving cavity 31 is provided with sleeves 8 that are sequentially fitted onto the outside of the drive shaft 4. The upper end of the sleeve 8 is connected to the inner top wall of the receiving cavity 31 by bolts, and the lower end extends to the lower part of the receiving cavity 31. The upper end of the drive shaft 4 is rotatably connected to the bottom cover 3 by bearings, and the lower end is rotatably connected to the lower side of the sleeve 8 by bearings. The sleeves 8 are preferably made of plastic or stainless steel, which can effectively protect the drive shaft 4, prevent grass from getting tangled in the drive shaft 4, or prevent moisture from entering the bearings of the drive shaft 4 and causing corrosion, thus ensuring the long-term stability and reliability of the drive shaft 4.

[0031] In this embodiment, the lower end of the drive shaft 4 is connected to the middle of the corresponding cutting blade 41. The two ends of the cutting blade 41 are respectively provided with blade segments 411, and the cutting edges of the two blade segments 411 are opposite to each other. Thus, when the drive shaft 4 rotates, the blade segments 411 at both ends of the cutting blade 41 can perform efficient grass cutting operations.

[0032] Furthermore, the blade section 411 has an upwardly curved guide vane 412 on the back side, which allows the cut grass to move to the upper part of the receiving cavity 31 under the action of the guide vane 412, and then move towards the discharge port 32 in a better manner.

[0033] In this embodiment, the rotary drive component 2 includes a drive wheel 21 and a motor or engine for driving the drive wheel 21 to rotate. The drive wheel 21 is fixedly connected to the output shaft of the motor or engine. The transmission belt 6 passes sequentially around all the transmission wheels 42 and the tension wheel 51 from the drive wheel 21, thereby transmitting the rotational power of the drive wheel 21 to all the transmission wheels 42 and the tension wheel 51 sequentially through the transmission belt 6. The structure is simple and reliable. The transmission belt 6 can be a belt or a synchronous belt; this design does not limit this.

[0034] In this embodiment, the diameter of the tensioning wheel 51 is smaller than that of the transmission wheel 42, which makes the rotational speed of the tensioning wheel 51 higher than that of the transmission wheel 42, thereby achieving a higher rotational speed of the impeller 52. This ensures that the airflow blown out from the guide shroud 7 is stronger, effectively blowing the cut grass towards the discharge port 32, thus improving the discharge efficiency and effect.

[0035] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wide-width riding lawnmower, characterized in that, include: The vehicle body (1) has a built-in rotary drive component (2); A bottom cover (3) is provided at the bottom of the vehicle body (1). The bottom cover (3) has a downward-opening receiving cavity (31). A discharge port (32) is provided on the left or right side of the receiving cavity (31). The drive shaft (4) is rotatably connected to the bottom cover (3) with the vertical axis as the axis. There are at least two drive shafts (4) and they are arranged at intervals in the left and right direction. The upper end of the drive shaft (4) is provided with a transmission wheel (42) and the lower end extends to the lower part of the receiving cavity (31). The lower end of the drive shaft (4) is provided with a cutting blade (41). At least one intermediate shaft (5) is provided between any two adjacent drive shafts (4). The intermediate shaft (5) is rotatably connected to the bottom cover (3) with the vertical axis as the axis. The intermediate shaft (5) is provided with a tension wheel (51) at the same height as the transmission wheel (42) and an impeller (52) located below the tension wheel (51). The annular drive belt (6) passes sequentially around all the drive pulleys (42) and tension pulleys (51) from the output end of the rotary drive (2). The cavity (31) is provided with a flow guide (7) located between adjacent drive shafts (4). The flow guide (7) is located at the upper part of the cavity (31) and includes an air inlet (71) connected to the lower part of the corresponding impeller (52) and an air outlet (72) facing the discharge port (32). The impeller (52) drives the gas to be blown towards the discharge port (32) through the flow guide (7) by rotating.

2. The wide-width riding lawnmower according to claim 1, characterized in that, The intermediate shaft (5) is rotatably connected to the upper side of the bottom cover (3) via a bearing. The tension wheel (51) and the impeller (52) are located at the upper and lower parts of the intermediate shaft (5), respectively. The bottom cover (3) is provided with a ventilation hole (33) that extends downward to the receiving cavity (31) at the position below the impeller (52). The ventilation hole (33) is connected to the air inlet (71) of the guide shroud (7).

3. The wide-width riding lawnmower according to claim 2, characterized in that, The flow guide (7) is hemispherical, with its end face facing upward and connected to the inner top wall of the receiving cavity (31). The spherical side of the flow guide (7) faces downward. The air inlet (71) is located on the upper side of the flow guide (7), and the air outlet (72) is elongated and located on the side of the flow guide (7) facing the discharge port (32).

4. The wide-width riding lawnmower according to any one of claims 1-3, characterized in that, The receiving cavity (31) is provided with sleeves (8) that are fitted onto the outside of the drive shaft (4) one by one. The upper end of the sleeve (8) is connected to the inner top wall of the receiving cavity (31) and the lower end extends to the lower part of the receiving cavity (31). The upper end of the drive shaft (4) is rotatably connected to the bottom cover (3) through a bearing, and the lower end is rotatably connected to the lower side of the sleeve (8) through a bearing.

5. The wide-width riding lawnmower according to claim 4, characterized in that, The lower end of the drive shaft (4) is connected to the middle of the corresponding cutting blade (41). The two ends of the cutting blade (41) are respectively provided with blade segments (411), and the cutting edges of the two blade segments (411) are opposite to each other.

6. The wide-width riding lawnmower according to claim 5, characterized in that, The blade section (411) has an upwardly curved guide vane (412) on the back side.

7. The wide-width riding lawnmower according to claim 1, characterized in that, The rotary drive (2) includes a drive wheel (21) and a motor / engine for driving the drive wheel (21) to rotate. The transmission belt (6) passes through all the transmission wheels (42) and tension wheels (51) in sequence from the drive wheel (21).

8. The wide-width riding lawnmower according to claim 1 or 7, characterized in that, The diameter of the tension wheel (51) is smaller than the diameter of the drive wheel (42).

9. The wide-width riding lawnmower according to claim 1, characterized in that, There are three drive shafts (4), with the middle drive shaft (4) located in front of the left and right drive shafts (4).

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