A telescopic garden mower cutter deck

Abstract

The utility model discloses a telescopic garden mower cutterhead relates to mower field, the utility model discloses a casing and mounting panel, the bottom of casing is installed with the cover body, and the inside of casing is connected with the movable shaft through the sealing bearing. The utility model discloses be provided with first scraper, second scraper, sliding seat, mounting rod, threaded rod, threaded seat, movable seat and connecting rod, when not needing the cleaning of the grass clippings attached to the cover body inner wall, the staff can make threaded seat go down and drive movable seat to go down through the rotation of threaded rod of carousel, and one movable seat then pulls the pull plate rotation, and then drive sliding seat sliding, and drive mounting rod and first scraper remove, make first scraper far away from cover body inner wall, and another movable seat then drive connecting rod to go down, and then drive second scraper to go down, make second scraper far away from cover body inner wall to slow down the wear rate of first scraper and second scraper, and prolong the service life of first scraper and second scraper.

Description

Technical Field

[0001] This utility model relates to the field of lawnmowers, specifically a retractable lawnmower blade. Background Technology

[0002] A lawnmower is a mechanical tool used to trim lawns, vegetation, etc., and the lawnmower blade (also known as lawnmower blade or grass cutter blade) is a key component of the lawnmower, used to cut grass on the lawn; these blades are usually made of high-strength alloy steel to ensure durability and cutting efficiency.

[0003] According to Chinese Patent Publication No. CN222128726U, a lawnmower blade is disclosed. The lawnmower blade is fixed to the drive rod by a cleaning rod and ensures that it is in contact with the inner wall of the placement slot. This helps to clean the inner wall of the protective shell, prevents residual lawn debris from sticking to the shell and affecting the normal operation of the lawnmower, thereby helping to keep the inside of the protective shell clean and improving the working efficiency and stability of the blade.

[0004] Regarding the aforementioned patent content, a cleaning rod is installed on the inner wall of the cover, and one end of the cleaning rod is fixedly connected to the connecting shaft. When the connecting shaft rotates, it can drive the cleaning rod to rotate, and the cleaning rod can scrape off the grass clippings attached to the inner wall of the cover. However, the cleaning rod is mostly designed to be fixedly installed. The cleaning rod is always in contact with the inner wall of the cover to achieve grass clipping removal. However, this fixed structure will cause the cleaning rod to continuously rub against the inner wall of the cover when the cutter head rotates at high speed. After long-term use, the cleaning rod is prone to wear and deformation, and the cleaning rod needs to be replaced frequently, thereby increasing maintenance costs. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a retractable lawnmower blade to solve the technical problem that the cleaning rod being constantly in contact with the inner wall of the cover will accelerate the wear rate of the cleaning rod.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a retractable garden lawnmower blade disc, comprising a housing and a mounting plate. A cover is installed at the bottom of the housing. A movable shaft is connected to the inside of the housing via a sealed bearing, and a cavity is formed inside the movable shaft. A threaded rod is connected to the inside of the cavity via a sealed bearing, and a threaded seat is threadedly connected to the outer wall of the threaded rod. Slide grooves are formed on both sides of the movable shaft, and movable seats are provided inside both slide grooves. A guide rod is fixed to one side of the movable shaft, and a slide seat is fitted on the outer wall of the guide rod. An mounting rod is connected to one side of the slide seat, and a first scraper is bolted to one end of the mounting rod. A pull plate is rotatably connected to one movable seat via a rotating shaft on the other side of the slide seat. A connecting rod is fixed to one side of the other movable seat, and a second scraper is bolted to the top of the connecting rod. A blade disc is bolted to the bottom of the movable shaft.

[0007] By adopting the above technical solution, the rotating shaft can drive the cutter head to rotate, and the rotation of the cutter head can cut lawns and weeds.

[0008] Furthermore, one side of each of the two movable seats is fixedly connected to a threaded seat, and the movable seats are slidably connected to a sliding groove.

[0009] By adopting the above technical solution, the linear motion of the threaded seat can be synchronously transmitted to the movable seat, avoiding the movable seat from shifting and ensuring the stability of the adjustment of the first scraper and the second scraper.

[0010] Furthermore, a motor is installed on the top side of the housing, and a drive gear is installed at the output end of the motor via a drive shaft.

[0011] By adopting the above technical solution, the motor can drive the drive gear to rotate, and the drive gear can drive the driven gear to rotate.

[0012] Furthermore, a driven gear is installed on the outer wall of the movable shaft, and the driving gear meshes with the driven gear. The diameter of the driving gear is smaller than the diameter of the driven gear.

[0013] By adopting the above technical solution, the rotational speed is reduced and the torque is amplified by the gear meshing ratio (small driving gear driving large driven gear), which meets the torque requirements of the cutter head for cutting hard grass / shrubs.

[0014] Furthermore, a second rotating plate is rotatably connected to one side of the housing via a pin, and a first rotating plate is rotatably connected to one side of the mounting plate via a pin, with the first rotating plate and the second rotating plate rotatably connected via a pin.

[0015] By adopting the above technical solution, the rotational connection between the first and second rotating plates allows the cutter head to extend and retract.

[0016] Furthermore, a hydraulic push rod is installed on the lower side of one side of the mounting plate, and the output end of the hydraulic push rod is fixedly connected to one side of the housing via a piston rod.

[0017] By adopting the above technical solution, the linear extension and retraction of the hydraulic push rod pushes the housing and the cutter head to move as a whole, thereby realizing the active adjustment of the cutting range (such as moving closer to / away from obstacles).

[0018] Furthermore, the top end of the threaded rod passes through a movable shaft and is fitted with a turntable.

[0019] By adopting the above technical solution, the threaded rod is driven to rotate by rotating the turntable. The rotation of the threaded rod drives the threaded seat to move, which in turn drives the movable seat to move.

[0020] Furthermore, the inner wall of the cover is provided with a wear-resistant layer, which is a polyurethane coating.

[0021] By adopting the above technical solutions, the wear resistance of the cover is enhanced, thereby increasing the service life of the cover.

[0022] Furthermore, the mounting rod is slidably connected to the guide rod via a slide block.

[0023] By adopting the above technical solution, the movement trajectory of the first scraper is limited, and the linear constraint of the guide rod ensures that the first scraper moves only in a fixed direction.

[0024] Furthermore, one side of the first scraper is bonded to the wear-resistant layer, and the top of the second scraper is bonded to the wear-resistant layer.

[0025] By adopting the above technical solution, the first and second scrapers are in close contact with the inner wall of the cover, which can scrape off the grass clippings attached to the inner wall of the cover in real time, avoiding the grass clippings from getting tangled in the cutter disc and affecting the cutting efficiency.

[0026] In summary, the present invention has the following main advantages: 1. This utility model, by comprising a first scraper, a second scraper, a slide block, a mounting rod, a threaded rod, a threaded seat, a turntable, a movable seat, and a connecting rod, allows workers to rotate the threaded rod via the turntable when it is not necessary to clean the grass clippings adhering to the inner wall of the enclosure. This causes the threaded seat to move downwards, which in turn moves the movable seat downwards. One movable seat then pulls the pull plate to rotate, thereby causing the slide block to slide and moving the mounting rod and the first scraper away from the inner wall of the enclosure. Meanwhile, the other movable seat moves the connecting rod downwards, which in turn moves the second scraper downwards, causing the second scraper away from the inner wall of the enclosure. In this way, the first and second scrapers are no longer in contact with the inner wall of the enclosure. This prevents friction between the first and second scrapers and the inner wall of the enclosure when the movable shaft rotates and drives the first and second scrapers to rotate, thus slowing down the wear rate of the first and second scrapers and extending their service life. 2. This utility model has a guide rod that guides the slide block, thereby improving the stability of the slide block during movement. It also has a groove that guides the movable seat, thereby improving the stability of the movable seat during movement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall orthographic structure of this utility model; Figure 3 This is a schematic diagram of the cover structure of this utility model from below; Figure 4 This is a schematic diagram of the cutter head structure of this utility model; Figure 5 This is a schematic diagram of the movable shaft structure of this utility model; Figure 6 This is a schematic diagram of the second scraper structure of this utility model; Figure 7 For the present utility model Figure 6 A magnified structural diagram of point A in the middle.

[0028] In the diagram: 1. Housing; 2. Cover plate; 3. Motor; 4. Drive gear; 5. Driven gear; 6. Movable shaft; 7. Cover; 8. Cutter head; 9. Mounting plate; 10. First rotating plate; 11. Second rotating plate; 12. Hydraulic push rod; 13. Turntable; 14. Wear-resistant layer; 15. Guide rod; 16. Slide seat; 17. Mounting rod; 18. First scraper rod; 19. Pull plate; 20. Slide groove; 21. Threaded rod; 22. Threaded seat; 23. Movable seat; 24. Connecting rod; 25. Second scraper rod; 26. Cavity. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1:

[0032] A retractable blade for a garden lawnmower, such as Figures 1-7 As shown, the device includes a housing 1 and a mounting plate 9. A cover 7 is installed at the bottom of the housing 1. A movable shaft 6 is connected to the inside of the housing 1 via a sealed bearing. A cavity 26 is formed inside the movable shaft 6. A threaded rod 21 is connected to the inside of the cavity 26 via a sealed bearing. A threaded seat 22 is threadedly connected to the outer wall of the threaded rod 21. Slide grooves 20 are formed on both sides of the lower part of the movable shaft 6. Movable seats 23 are provided inside both slide grooves 20. A guide rod 15 is fixed to one side of the movable shaft 6. The outer wall of the guide rod 15 is sleeved with... There is a slide seat 16, and a mounting rod 17 is connected to one side of the slide seat 16. A first scraper 18 is installed at one end of the mounting rod 17 by bolts. A pull plate 19 is rotatably connected to a movable seat 23 on the other side of the slide seat 16 via a rotating shaft. A connecting rod 24 is fixed to one side of another movable seat 23, and a second scraper 25 is installed at the top of the connecting rod 24 by bolts. A cutter head 8 is installed at the bottom end of the movable shaft 6 by bolts. When the movable shaft 6 rotates, it can drive the cutter head 8 to rotate. The rotation of the cutter head 8 can cut lawns and weeds.

[0033] See Figures 1-6One side of each of the two movable seats 23 is fixedly connected to the threaded seat 22, and the movable seat 23 is slidably connected to the slide groove 20, ensuring that the linear movement of the threaded seat 22 can be synchronously transmitted to the movable seat 23, preventing the movable seat 23 from shifting, and ensuring the stability of the adjustment of the first scraper 18 and the second scraper 25. The mounting rod 17 is slidably connected to the guide rod 15 through the slide 16, limiting the movement trajectory of the first scraper 18. Through the linear constraint of the guide rod 15, it is ensured that the first scraper 18 moves only in a fixed direction. One side of the first scraper 18 is in contact with the wear-resistant layer 14, and the top of the second scraper 25 is in contact with the wear-resistant layer 14. The first scraper 18 and the second scraper 25 are in contact with the inner wall of the cover 7, which can scrape off the grass clippings attached to the inner wall of the cover 7 in real time, and prevent the grass clippings from wrapping around the cutter disc 8 and affecting the cutting efficiency.

[0034] See Figures 1-7 A motor 3 is installed on the top side of the housing 1, and a drive gear 4 is installed on the output end of the motor 3 through the drive shaft. When the motor 3 works, it can drive the drive gear 4 to rotate, and the drive gear 4 can drive the driven gear 5 to rotate. The driven gear 5 is installed on the outer wall of the movable shaft 6. The drive gear 4 and the driven gear 5 mesh. The diameter of the drive gear 4 is smaller than the diameter of the driven gear 5. By using the gear meshing ratio (small drive gear drives large driven gear), the rotation speed is reduced and the torque is amplified to meet the torque requirements of the cutter head 8 for cutting hard grass / shrubs.

[0035] See Figures 1-5 A second rotating plate 11 is rotatably connected to one side of the housing 1 via a pin, and a first rotating plate 10 is rotatably connected to one side of the mounting plate 9 via a pin. The first rotating plate 10 and the second rotating plate 11 are rotatably connected via a pin. The rotatable connection of the first rotating plate 10 and the second rotating plate 11 allows the cutter head 8 to extend and retract. A hydraulic push rod 12 is installed below one side of the mounting plate 9. The output end of the hydraulic push rod 12 is fixedly connected to one side of the housing 1 via a piston rod. Through the linear extension and retraction of the hydraulic push rod 12, the housing 1 and the cutter head 8 are pushed to move as a whole, thereby realizing the active adjustment of the cutting range (such as moving closer to / away from obstacles). The hydraulic push rod 12 and the motor 3 are electrically connected to the external control system for easy control of the hydraulic push rod 12 and the motor 3.

[0036] Example 2:

[0037] Based on the above embodiment 1, the following structure will be provided to improve the wear resistance of the inner wall of the cover 7.

[0038] Specifically, the inner wall of the cover 7 is provided with a wear-resistant layer 14, which is a polyurethane coating, to enhance the wear resistance of the cover 7 and thus improve the service life of the cover 7.

[0039] Example 3:

[0040] Based on the above embodiment 1, the following structure will be provided to facilitate the rotation of the threaded rod 21.

[0041] Specifically, the top of the threaded rod 21 passes through the movable shaft 6 and is equipped with a turntable 13. The threaded rod 21 is driven to rotate by rotating the turntable 13. The rotation of the threaded rod 21 drives the threaded seat 22 to move, which in turn drives the movable seat 23 to move.

[0042] The working principle of this utility model is as follows: First, before use, the staff connects the power supply. After the motor 3 at the top of the housing 1 is powered on, it drives the active gear 4 to rotate through the drive shaft at the output end. The active gear 4 meshes with the driven gear 5 on the outer wall of the movable shaft 6 (the diameter of the active gear 4 is smaller than the diameter of the driven gear 5). By reducing the speed and increasing the torque through the gear meshing ratio, the driven gear 5 drives the movable shaft 6 to rotate synchronously. The cutter disc 8 at the bottom of the movable shaft 6 rotates at high speed with the movable shaft 6 to achieve the cutting of lawns and weeds. When it is necessary to achieve overall displacement of the cutter head to adapt to different working scenarios, the hydraulic push rod 12 can be activated. Since the piston rod of the hydraulic push rod 12 is fixedly connected to the housing 1, when the piston rod extends or retracts, it directly pushes the housing 1, the bottom cover 7, and the cutter head 8 to move as a whole. The housing 1 and the second rotating plate 11, and the mounting plate 9 and the first rotating plate 10 are all rotatably connected by pins. At the same time, the first rotating plate 10 and the second rotating plate 11 also rotate by pins. When the housing 1 moves, the first rotating plate 10 and the second rotating plate 11 rotate synchronously, limiting the movement trajectory of the housing 1 (to prevent the housing 1 from deviating), and finally realizing the movement of the cutter head 8 towards / away from obstacles, thereby enabling the extension and retraction adjustment of the cutter head 8. When it is necessary to clean the grass clippings adhering to the inner wall of the cover 7, the worker rotates the turntable 13 at the top of the movable shaft 6, which drives the threaded rod 21 passing through the movable shaft to rotate synchronously (the threaded rod 21 is connected to the cavity 26 of the movable shaft 6 through a sealed bearing to ensure stable rotation). The threaded seat 22 on the outer wall of the threaded rod 21 moves upward along the threaded rod 21 under the action of threaded transmission (the threaded seat 22 is fixedly connected to two movable seats 23). The two movable seats 23 slide upward along the sliding grooves 20 on both sides of the movable shaft 6. One movable seat 23 pulls the pull plate 19 to rotate through the rotating shaft. The pull plate drives the slide 16 to slide along the guide rod 15. The mounting rod 17 on one side of the slide 16 moves synchronously, so that the first scraper 18 at one end of the mounting rod 17 fits against the wear-resistant layer 14 of the inner wall of the cover 7. The other movable seat 23 drives the connecting rod 24 to move upward, and the second scraper 25 at the top of the connecting rod 24 moves upward. The wear-resistant layer 14 is synchronously attached to the inner wall of the cover 7; while the cutter disc 8 rotates, the first scraper 18 and the second scraper 25 rotate synchronously with the movable shaft 6 to scrape off the grass clippings attached to the inner wall of the cover 7 in real time. When there is no need to clean up grass clippings, the operator can rotate the turntable 13 in the opposite direction, causing the threaded rod 21 to rotate in the opposite direction. The threaded seat 22 moves downward along the threaded rod 21, simultaneously causing the two movable seats 23 to slide downward along the slide groove 20. One movable seat 23 pushes the slide seat 16 to slide in the opposite direction along the guide rod 15 through the pull plate 19. The mounting rod 17 drives the first scraper 18 away from the inner wall of the cover 7, and the other movable seat 23 drives the connecting rod 24 to move downward. The second scraper 25 moves away from the inner wall of the cover 7 in the same way. When the cutter head 8 rotates, the scraper does not contact the cover, avoiding friction and wear, thereby extending the service life of the scraper.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A retractable lawnmower blade, comprising a housing (1) and a mounting plate (9), characterized in that: A cover (7) is installed at the bottom of the housing (1). A movable shaft (6) is connected to the inside of the housing (1) through a sealed bearing. A cavity (26) is opened inside the movable shaft (6). A threaded rod (21) is connected to the inside of the cavity (26) through a sealed bearing. A threaded seat (22) is threaded to the outer wall of the threaded rod (21). Slide grooves (20) are opened on both sides of the movable shaft (6). Movable seats (23) are provided inside both slide grooves (20). A guide rod (15) is fixed on one side of the movable shaft (6). The guide rod (15) is fitted with a slide (16) on its outer wall. A mounting rod (17) is connected to one side of the slide (16), and a first scraper (18) is installed at one end of the mounting rod (17) by bolts. A pull plate (19) is rotatably connected between the other side of the slide (16) and a movable seat (23) by a rotating shaft. A connecting rod (24) is fixed to one side of the other movable seat (23), and a second scraper (25) is installed at the top of the connecting rod (24) by bolts. A cutter disc (8) is installed at the bottom end of the movable shaft (6) by bolts.

2. The retractable lawnmower blade according to claim 1, characterized in that: One side of each of the two movable seats (23) is fixedly connected to the threaded seat (22), and the movable seats (23) are slidably connected to the slide groove (20).

3. The retractable lawnmower blade according to claim 1, characterized in that: A motor (3) is installed on one side of the top of the housing (1), and the output end of the motor (3) is equipped with a drive gear (4) via a drive shaft.

4. The retractable lawnmower blade according to claim 3, characterized in that: The outer wall of the movable shaft (6) is fitted with a driven gear (5), and the driving gear (4) meshes with the driven gear (5). The diameter of the driving gear (4) is smaller than the diameter of the driven gear (5).

5. The retractable lawnmower blade according to claim 1, characterized in that: A second rotating plate (11) is rotatably connected to one side of the housing (1) via a pin, and a first rotating plate (10) is rotatably connected to one side of the mounting plate (9) via a pin, and the first rotating plate (10) and the second rotating plate (11) are rotatably connected via a pin.

6. The retractable lawnmower blade according to claim 1, characterized in that: A hydraulic push rod (12) is installed on one side of the mounting plate (9), and the output end of the hydraulic push rod (12) is fixedly connected to one side of the housing (1) through a piston rod.

7. The retractable lawnmower blade according to claim 1, characterized in that: The top of the threaded rod (21) passes through the movable shaft (6) and is fitted with a turntable (13).

8. The retractable lawnmower blade according to claim 1, characterized in that: The inner wall of the cover (7) is provided with a wear-resistant layer (14), which is a polyurethane coating.

9. The retractable lawnmower blade according to claim 1, characterized in that: The mounting rod (17) is slidably connected to the guide rod (15) via the slide (16).

10. A retractable lawnmower blade according to claim 1, characterized in that: One side of the first scraper (18) is attached to the wear-resistant layer (14), and the top of the second scraper (25) is attached to the wear-resistant layer (14).

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