Mowing cutter fixing seat with fan
By installing a grass-cutting blade holder with a fan on the lawnmower chassis, the air volume and air pressure are increased by using the grass-cutting motor and blade holder fan blades, which solves the problem of difficult grass discharge from the lawnmower and enables smooth discharge of grass clippings and efficient operation of the motor.
Patent Information
- Application Number
- CN202423288157.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing lawnmowers have low air volume and air pressure at the discharge port, which makes it difficult to discharge shredded grass and causes weeds to accumulate in the grass collection box.
A grass-cutting blade holder with a fan is installed on the chassis of the lawnmower. It includes a grass-cutting motor, grass-cutting blades, a rotating shaft, a blade holder fan, and a grass discharge channel. The grass-cutting motor drives the rotating shaft and blade holder fan to rotate, increasing the air volume and air pressure in the grass discharge channel. The airflow is guided by the Archimedes spiral-shaped grass discharge channel, reducing turbulence and eddies.
The increased airflow and pressure at the discharge port allow the shredded grass to move more smoothly to the discharge port, reducing chassis buildup, lowering noise, and improving the working environment of the mowing motor.
Smart Images
Figure CN223798802U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of lawn mower, especially to a lawn cutter fixing seat with a fan. BACKGROUND
[0002] Lawn mower is widely used in urban landscaping and garden design, and the use is more for the trimming of lawn. The cut grass is often collected by a grass collector. The existing lawn mower, especially the hand-push type, is usually provided with a detachable grass collecting box at the rear grass outlet position of the lawn mower. The grass collecting box is used to immediately store the grass clippings cut by the lawn mower. When the grass clippings fill the entire grass collecting box, the grass collecting box is detached to pour out the grass clippings. The air volume and air pressure at the grass outlet are low, and it is difficult to discharge the grass clippings. CONTENT OF THE UTILITY MODEL
[0003] In order to improve the air volume and air pressure at the grass outlet, the present application provides a lawn cutter fixing seat with a fan.
[0004] The present application provides a lawn cutter fixing seat with a fan, which adopts the following technical scheme:
[0005] A lawn cutter fixing seat with a fan, comprising a chassis, a grass cutting assembly and a cutter seat fan blade, the grass cutting assembly comprising a grass cutting motor, a grass cutting blade and a rotating shaft, the lower end surface of the chassis forming a grass outlet channel, the side wall of the chassis being provided with a grass outlet, the rotating shaft being rotatably connected in the grass outlet channel, the grass cutting motor being used to drive the rotating shaft to rotate, the cutter seat fan blade being located in the grass outlet channel, and the cutter seat fan blade being arranged on the rotating shaft.
[0006] By adopting the above technical scheme, the grass cutting assembly is used to cut weeds, the grass cutting motor drives the rotating shaft to rotate, the rotating shaft drives the grass cutting blade to rotate, and at the same time, the rotating shaft drives the cutter seat fan blade to rotate, so that the air volume and air pressure in the grass outlet channel are increased, the weeds are better moved towards the direction of the grass outlet, and the accumulation of weeds on the chassis is reduced, and the grass discharge capacity is increased.
[0007] Optionally, the grass outlet channel is in the shape of an Archimedes spiral, the rotating shaft is coaxially arranged with the grass outlet channel, and one end of the grass outlet channel away from the rotating shaft is communicated with the grass outlet.
[0008] By adopting the above technical scheme, the grass outlet channel is in the shape of an Archimedes spiral, which can guide the airflow in the grass cutting channel to flow along the shape of the grass outlet channel. The grass outlet channel and the cutter seat fan blade form a function similar to that of a negative pressure fan, which reduces the occurrence of turbulent flow and vortex flow of the airflow, and the airflow in the grass cutting channel also makes the weeds more smoothly move to the grass outlet.
[0009] Optionally, the cross-sectional area of the grass outlet channel gradually increases in the direction of the movement of the grass clippings.
[0010] By adopting the technical scheme, the flow resistance in the grass outlet passage gradually decreases, the ventilation volume rises, the situation of turbulent flow and worm gear is further reduced, and the generation of noise is reduced.
[0011] Optionally, the grass cutting assembly further comprises a first pulley, a second pulley and a multi-section belt, the first pulley is arranged on the output shaft of the grass cutting motor, the second pulley is arranged on the rotating shaft, and the multi-section belt is sleeved on the first pulley and the second pulley, and the diameter of the first pulley is smaller than that of the second pulley.
[0012] By adopting the technical scheme, the motor drives the first pulley to rotate, the first pulley drives the second pulley to rotate through the multi-section belt, the contact area of the multi-section belt with the first pulley and the second pulley is large, the transmission efficiency of the multi-section belt is better, the situation of slipping is reduced, the diameter of the first pulley is smaller than that of the second pulley, the rotating speed of the second pulley is lower than that of the first pulley, the engagement area of the second pulley with the multi-section belt is large, the second pulley has strong carrying capacity, and the rotating shaft is better driven to rotate.
[0013] Optionally, the grass cutting motor, the first pulley, the second pulley and the multi-section belt are located on the upper end surface of the chassis, a support is arranged on the chassis, the support and the chassis form a containing cavity, and the first pulley, the second pulley and the multi-section belt are located in the containing cavity.
[0014] By adopting the technical scheme, since the multi-section belt has multiple trapezoidal sections, if the multi-section belt contacts weeds, the transmission of the first pulley and the second pulley may be affected, and the first pulley, the second pulley and the multi-section belt located in the containing cavity can reduce the situation of contacting weeds.
[0015] Optionally, a brake assembly is arranged on the second pulley, the brake assembly comprises a tension spring, a brake block and a friction leather ring, the friction leather ring is arranged on the support, one end of the brake block is rotationally connected to the second pulley, and the tension spring is used to keep the brake block abutting against the friction leather ring.
[0016] By adopting the technical scheme, when the device stops working, the tension spring drives the brake block to abut against the friction leather ring, at this time, the grass cutting blade cannot rotate due to the friction force, and the braking time of the grass cutting blade after the device is powered off is reduced, and in the working process, the driving motor drives the first pulley to rotate, the first pulley drives the second pulley to rotate through the multi-section belt, at this time, the torsion of the second pulley is greater than the friction force between the brake block and the friction leather ring, as the rotating speed of the second pulley gradually increases, the centrifugal force of the brake block moves away from the friction leather ring in the direction away from the friction leather ring, and at this time, the second pulley is not affected by the brake assembly.
[0017] Optionally, the first pulley is further provided with a motor fan for discharging heat in the containing cavity, the bottom plate is internally provided with a through hole for communication between the containing cavity and the grass outlet channel, and the support is further provided with a heat dissipation hole for improving heat dissipation of the mowing motor.
[0018] By adopting the above technical scheme, since the mowing motor generates a large amount of heat during operation, the motor fan sends the heat of the mowing motor into the containing cavity through the heat dissipation hole, the heat in the containing cavity enters the grass outlet channel under the action of the cutter holder fan blade, and then is discharged through the grass outlet, so that the temperature around the mowing motor is reduced, and the working environment of the mowing motor is improved.
[0019] Optionally, the bottom plate is provided with a bayonet for connecting with the grass collecting bag.
[0020] By adopting the above technical scheme, the bottom plate and the grass collecting bag are connected through the bayonet, the grass collecting bag is detachable, and the staff can clean the chopped grass in the grass collecting bag.
[0021] In summary, the present application has at least one of the following beneficial technical effects:
[0022] 1. The cutter holder fan blade increases the air pressure and air volume in the grass outlet channel, so that the chopped grass can more smoothly enter the grass outlet;
[0023] 2. The brake assembly is used for reducing the braking time of the mowing blade when the device stops running;
[0024] 3. The motor fan is used for sending the heat generated by the motor into the grass outlet channel through the containing cavity, so as to improve the working environment of the motor. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a cutter holder with a fan.
[0026] Figure 2 is Figure 1 is a sectional view of the bottom plate, for showing the positional relationship between the mowing assembly and the bottom plate.
[0027] Figure 3 is Figure 2 is an exploded view of the support, for showing the positional relationship between the structures in the containing cavity.
[0028] Figure 4 is Figure 3 is a structural schematic view of the brake assembly.
[0029] Fig. 1 is a bottom plate; 11 is a grass outlet channel; 12 is a grass outlet; 13 is a bayonet; 14 is a through hole; 2 is a grass cutting assembly; 21 is a grass cutting motor; 22 is a grass cutting blade; 23 is a rotating shaft; 24 is a first pulley; 25 is a second pulley; 26 is a V-belt; 27 is a motor fan; 3 is a blade seat fan blade; 4 is a support; 41 is a containing cavity; 42 is a heat dissipation hole; 5 is a brake assembly; 51 is a tension spring; 52 is a brake block; 53 is a friction sheave. DETAILED DESCRIPTION
[0030] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.
[0031] The present application discloses a grass cutting blade fixing seat with a fan. Referring to Figure 1 and Figure 2 A grass cutting blade fixing seat with a fan comprises a bottom plate 1, a grass cutting assembly 2, a blade seat fan blade 3 and a support 4. The bottom plate 1 is provided with a grass outlet channel 11 at the lower end surface thereof. The grass outlet channel 11 is in the shape of an Archimedes spiral. The side wall of the bottom plate 1 is provided with a grass outlet 12. The grass outlet 12 is connected to the end of the grass outlet channel 11 away from the axis direction of the grass outlet channel 11. The cut grass moves along the direction away from the axis of the grass outlet channel 11. The cross-sectional area of the grass outlet channel 11 gradually increases along the moving direction of the cut grass. The bottom plate 1 is provided with a bayonet 13 for connecting with a grass collecting bag.
[0032] Referring to Figure 1 and Figure 2 The grass cutting assembly 2 comprises a grass cutting motor 21, a grass cutting blade 22, a rotating shaft 23, a first pulley 24, a second pulley 25 and a V-belt 26. The support 4 is fixedly arranged on the upper end surface of the bottom plate 1. The support 4 and the bottom plate 1 form a containing cavity 41. The grass cutting motor 21 is vertically arranged. The grass cutting motor 21 is fixedly arranged on the upper end surface of the support 4. The output shaft of the grass cutting motor 21 penetrates into the containing cavity 41. The support 4 is provided with a plurality of heat dissipation holes 42. The extending direction of the heat dissipation holes 42 is towards the grass cutting motor 21. The first pulley 24 is located in the containing cavity 41. The first pulley 24 is coaxially arranged with the output shaft of the grass cutting motor 21. The first pulley 24 is fixedly arranged on the output shaft of the grass cutting motor 21. The grass cutting motor 21 is further provided with a motor fan 27. The motor fan 27 is located in the containing cavity 41. The motor fan 27 is coaxially arranged with the first pulley 24. The height of the motor fan 27 is higher than that of the first pulley 24. The motor fan 27 is fixedly arranged on the output shaft of the grass cutting motor 21.
[0033] Referring to Figure 3 and Figure 4The second pulley 25 is coaxially arranged with the axis of the grass outlet channel 11, is located in the accommodating cavity 41, is rotationally connected to the upper end face of the base plate 1, the multiple-pulley belt 26 is located in the accommodating cavity 41, is sleeved on the first pulley 24 and the second pulley 25, the diameter of the second pulley 25 is greater than that of the first pulley 24, the second pulley 25 is provided with the brake assembly 5, the brake assembly 5 includes two tension springs 51, two brake blocks 52 and a friction sheave 53, the friction sheave 53 is coaxially arranged with the output shaft, is fixedly arranged on the support 4, the two brake blocks 52 are uniformly distributed in the circumferential direction of the axis of the second pulley 25, the brake block 52 is arc-shaped, one end of the brake block 52 is rotationally connected to the second pulley 25, the two tension springs 51 correspond to the two brake blocks 52, one end of the tension spring 51 is hooked to the end of the brake block 52 away from the rotation axis 23, the other end of the tension spring 51 is arranged on the second pulley 25, when the second pulley 25 stops rotating or rotates at a low speed, the brake block 52 is kept abutting against the friction sheave 53 under the action of the tension spring 51.
[0034] With reference to Figure 2 and Figure 3 The rotation axis 23 is coaxially arranged with the second pulley 25, is fixedly arranged on the second pulley 25, the lower end of the rotation axis 23 penetrates into the grass outlet channel 11, the grass cutting blade 22 is located in the grass outlet channel 11, is fixedly arranged on the lower end face of the rotation axis 23, the blade seat fan blade 3 is located in the grass outlet channel 11, is coaxially arranged with the grass cutting blade 22, the height of the blade seat fan blade 3 is higher than that of the grass cutting blade 22, is fixedly arranged on the rotation axis 23, the through hole 14 is arranged on the base plate 1, is used for the communication between the grass outlet channel 11 and the accommodating cavity 41.
[0035] The implementation principle of the grass cutting tool fixing seat with a fan in the embodiment of the application is as follows: when the device works, the grass cutting motor 21 drives the first pulley 24 to rotate, the first pulley 24 drives the second pulley 25 to rotate through the multiple-pulley belt 26, the second pulley 25 drives the grass cutting blade 22 to perform the work of removing weeds through the rotation axis 23, at the same time, the grass cutting motor 21 drives the motor fan 27 to rotate, the motor fan 27 transmits the heat generated by the grass cutting motor 21 into the accommodating cavity 41, and the blade seat fan blade 3 on the rotation axis 23 transmits the air in the accommodating cavity 41 into the grass outlet channel 11, because the grass outlet channel 11 is in the shape of an Archimedes spiral, the hot air enters the grass outlet 12 along the flow direction of the grass outlet channel 11, at the same time, the cut grass is also cut by the grass cutting blade 22 and enters the grass outlet 12 along with the hot air, and is collected and treated by the grass collecting bag.
[0036] The above are preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.
Claims
1. A grass cutting knife holder with a fan, characterised in that: The application relates to a lawn mower, which comprises a chassis (1), a mowing assembly (2) and a cutter seat fan blade (3), wherein the mowing assembly (2) comprises a mowing motor (21), a mowing blade (22) and a rotating shaft (23), the lower end surface of the chassis (1) forms a grass outlet channel (11), the side wall of the chassis (1) is provided with a grass outlet (12), the rotating shaft (23) is rotationally connected in the grass outlet channel (11), the mowing motor (21) is used for driving the rotating shaft (23) to rotate, and the cutter seat fan blade (3) is located in the grass outlet channel (11) and is arranged on the rotating shaft (23).
2. A fixed base for a grass cutting knife with a fan as claimed in claim 1, characterized in that: The grass outlet channel (11) is in an Archimedes spiral shape, the rotating shaft (23) is coaxially arranged with the grass outlet channel (11), and one end, away from the rotating shaft (23), of the grass outlet channel (11) is communicated with the grass outlet (12).
3. A fixed base for a grass cutting knife with a fan as claimed in claim 2, wherein: The cross-sectional area of the grass outlet channel (11) gradually increases along the direction of grass movement.
4. The fixed base for a grass cutting knife with a fan according to claim 1, characterized in that: The mowing assembly (2) further comprises a first pulley (24), a second pulley (25) and a multi-pulley belt (26), the first pulley (24) is arranged on the output shaft of the mowing motor (21), the second pulley (25) is arranged on the rotating shaft (23), the multi-pulley belt (26) is sleeved on the first pulley (24) and the second pulley (25), and the diameter of the first pulley (24) is smaller than that of the second pulley (25).
5. A fixed base for a grass cutting knife with a fan as claimed in claim 4, wherein: The mowing motor (21), the first pulley (24), the second pulley (25) and the multi-pulley belt (26) are all located on the upper end surface of the chassis (1), the chassis (1) is provided with a support (4), the support (4) and the chassis (1) form a containing cavity (41), and the first pulley (24), the second pulley (25) and the multi-pulley belt (26) are all located in the containing cavity (41).
6. A fixed base for a grass cutting knife with a fan as claimed in claim 5, characterized in that: The second pulley (25) is provided with a brake assembly (5), the brake assembly (5) comprises a tension spring (51), a brake block (52) and a friction leather ring (53), the friction leather ring (53) is arranged on the support (4), one end of the brake block (52) is rotationally connected to the second pulley (25), and the tension spring (51) is used for keeping the brake block (52) abutting against the brake block (52).
7. A fixed base for a grass cutting knife with fan as claimed in claim 6, characterized in that: The first pulley (24) is further provided with a motor fan (27) for discharging heat in the containing cavity (41), the chassis (1) is provided with a through hole (14) for communicating the containing cavity (41) with the grass outlet channel (11), and the support (4) is further provided with a heat dissipation hole (42) for improving heat dissipation of the mowing motor (21).
8. The fixed base for a grass cutting knife with a fan according to claim 1, characterized in that: The chassis (1) is provided with a bayonet (13) for being connected with a grass collecting bag.