Height adjusting device for cutter head of mowing machine

Abstract

The utility model relates to the technical field of mowers, in particular to a height adjusting device for a cutter head of a mower, which is provided with a height lifting mechanism for threaded adjustment, so that the height of the cutter head can be adjusted and fixed to adapt to grass cutting with different requirements, and the practicability is improved. Comprising a mowing cover, a supporting frame, a threaded sleeve, a height adjusting screw rod, a twisting disc, a connecting frame, a mowing driving motor, a mowing tool bit, a constraint rail and a sliding block, the middle of the top end of the mowing cover is in through connection with the bottom end of the supporting frame, the inner side of the middle of the top end of the supporting frame is connected with the outer side of the threaded sleeve, and the inner wall of the threaded sleeve is in threaded connection with the outer wall of the height adjusting screw rod; the top end of the height adjusting screw rod is connected with the middle of the bottom end of the twisting disc, the bottom end of the height adjusting screw rod is rotationally connected with the middle of the top end of the connecting frame, the mowing cutter head is located on the inner side of the mowing cover, and the middle of the left side and the middle of the right side of the connecting frame are connected with the inner ends of the sliding blocks correspondingly. A vehicle body structure is arranged at the bottom of the mowing cover.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a lawn mower cutter head height adjustment device. Background Art

[0002] Lawn mower is also called weeder, lawn mower, lawn trimmer, etc. A lawn mower is a mechanical tool used to trim lawns and vegetation, etc. It consists of a cutter disc, an engine, a running wheel, a running mechanism, a blade, a handrail, and a control part. The cutter disc is mounted on the running wheel, the engine is mounted on the cutter disc, and the blade is mounted on the output shaft of the engine. The blade uses the high-speed rotation of the engine to increase the speed a lot, saving the working time of the weeding workers and reducing a lot of human resources.

[0003] In the existing lawn mower with Chinese patent publication number CN216492024U, the axis of the motor shaft of the driving mechanism, the central axis of the reduction mechanism, and the axis of the output shaft of the driving cutting mechanism for cutting work tend to be collinear, so that the layout of the equipment is reasonable, the volume of the mowing chamber is increased, and the grass chopping efficiency and grass collecting effect are improved.

[0004] However, the device is limited to the blade being at a constant height, which limits the grass cutting height and is not practical enough. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the utility model provides a height lifting mechanism with a screw-mounted adjustment, so that the height of the cutter head can be adjusted and fixed, which can adapt to grass cutting with different needs and improve practicality.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lawn mower cutter head height adjustment device, comprising a mowing cover, a support frame, a threaded sleeve, a height adjustment screw, a twist disk, a connecting frame, a mowing drive motor, a mowing cutter head, a constraint rail and a slider, wherein the middle part of the top of the mowing cover is connected with the bottom end of the support frame, the inner side of the middle part of the top of the support frame is connected with the outer side of the threaded sleeve, the inner wall of the threaded sleeve is threadedly connected with the outer wall of the height adjustment screw, the top of the height adjustment screw is connected with the middle part of the bottom end of the twist disk, the bottom end of the height adjustment screw is rotatably connected with the middle part of the top of the connecting frame, the bottom end of the connecting frame is connected with the bottom end of the mowing drive motor, the output end of the mowing drive motor is connected with the middle part of the top of the mowing cutter head, the mowing cutter head is located inside the mowing cover, the middle parts of the left and right sides of the connecting frame are respectively connected with the inner ends of a group of sliders, the middle parts of the left and right ends of the supporting frame are vertically connected with the outer sides of a group of constraint rails, and a body structure is provided at the bottom of the mowing cover.

[0009] Preferably, it also includes a tightening screw groove frame, a tightening screw, a tightening wrench and a contact sleeve, the outer side of the lower part of the height adjustment screw is connected to the inner side of the contact sleeve, the middle front side of the top of the connecting frame is connected to the bottom end of the tightening screw groove frame, the inner wall of the tightening screw groove frame is screwed to the outer wall of the tightening screw, and the front end of the tightening screw is connected to the middle of the rear end of the tightening wrench.

[0010] Preferably, it further comprises baffles, and the lower side of each group of constraint rails at the inner end of the support frame is respectively connected to the outer end of a group of baffles.

[0011] Preferably, the vehicle body structure includes a steering shaft, a wheel box and rollers, the four corner sides of the bottom end of the mowing cover are rotatably connected to the middle of the top end of a group of wheel boxes via a group of steering shafts, and a group of rollers are rotatably connected to the inner side of each group of wheel boxes.

[0012] Preferably, it also includes brake pads and pedal pads, each group of wheel boxes is movably connected to a group of brake pads on the inner side, the brake pad output end is in clutch contact with the outer side of the roller, and the outer side of each group of brake pads is connected to the inner side of a group of pedal pads.

[0013] Preferably, it further comprises a push handle frame and a handle bar, wherein the rear side of the top end of the mowing cover is connected to the bottom end of the push handle frame, and the upper side of the inner part of the push handle frame is connected to both sides of the handle bar.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a lawn mower cutter head height adjustment device, which has the following beneficial effects:

[0016] By turning the dial, the height-adjusting screw can be rotated, and the height-adjusting screw is threadedly matched with the threaded sleeve. The two sets of sliders and the constraint rails constrain the circumferential movement of the connecting frame, so that the connecting frame slides and rises and falls on the inner side of the constraint rails through the sliders on both sides, thereby driving the mowing head to rise and fall accordingly, and self-locking with the thread of the threaded sleeve after the height-adjusting screw stops at the corresponding height to make the height constant. Afterwards, the mowing cover is driven by the vehicle body structure to move on the grass, and the mowing drive motor is operated to drive the mowing head to rotate, and the grass is cut and trimmed at this height. A screw-adjustable height lifting mechanism is provided, so that the height of the cutter head can be adjusted and fixed to meet grass cutting needs of different needs and improve practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axial view of the schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 Front view of

[0019] Figure 3 For this utility model Figure 1 A magnified view of;

[0020] Figure 4 For this utility model Figure 1 Bottom view of .

[0021] Markings in the attached drawings: 1. mowing hood; 2. support frame; 3. threaded sleeve; 4. height adjustment screw; 5. screw plate; 6. connecting frame; 7. mowing drive motor; 8. mowing cutter head; 9. restraint rail; 10. slider; 11. tightening screw slot frame; 12. tightening screw; 13. tightening wrench; 14. contact sleeve; 15. baffle; 16. steering shaft; 17. wheel box; 18. roller; 19. brake pad; 20. pedal; 21. push handle frame; 22. handle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] See also Figure 1-4 A mower head height adjustment device comprises a mowing cover 1, a support frame 2, a threaded sleeve 3, a height adjustment screw 4, a screw plate 5, a connecting frame 6, a mowing drive motor 7, a mowing head 8, a restraining rail 9 and a slider 10. The middle of the top of the mowing cover 1 is connected with the bottom of the support frame 2, the inner side of the middle of the top of the support frame 2 is connected with the outer side of the threaded sleeve 3, the inner wall of the threaded sleeve 3 is screwed with the outer wall of the height adjustment screw 4, the top of the height adjustment screw 4 is connected with the middle of the bottom of the screw plate 5, the bottom of the height adjustment screw 4 is rotatably connected with the middle of the top of the connecting frame 6, the bottom of the inner part of the connecting frame 6 is connected with the bottom of the mowing drive motor 7, the output end of the mowing drive motor 7 is connected with the middle of the top of the mowing head 8, the mowing head 8 is located inside the mowing cover 1, and the middle of the left and right sides of the connecting frame 6 are connected. They are respectively connected to the inner ends of a group of sliders 10, and the middle parts of the left and right ends of the support frame 2 are vertically connected to the outer sides of a group of constraint rails 9 respectively. A body structure is provided at the bottom of the mowing cover 1; by twisting the screw plate 5, the height adjustment screw 4 can be rotated, and the height adjustment screw 4 is screwed with the threaded sleeve 3. The circumferential movement of the connecting frame 6 is constrained by the two groups of sliders 10 and the constraint rails 9, so that the connecting frame 6 slides and rises on the inner side of the constraint rail 9 through the sliders 10 on both sides, thereby driving the mowing head 8 to rise and fall accordingly, and after the height adjustment screw 4 stops rotating at the corresponding height, it is self-locked with the thread of the threaded sleeve 3 to make the height constant, and then the mowing cover 1 is driven by the body structure to move on the grass, and the mowing drive motor 7 is operated to drive the mowing head 8 to rotate, and the grass is cut and trimmed at this height.

[0025] It also includes a tightening screw groove frame 11, a tightening screw 12, a tightening hand 13 and a contact sleeve 14. The outer side of the lower part of the height adjustment screw 4 is connected to the inner side of the contact sleeve 14, the middle front side of the top of the connecting frame 6 is connected to the bottom end of the tightening screw groove frame 11, the inner wall of the tightening screw groove frame 11 is screwed to the outer wall of the tightening screw 12, and the front end of the tightening screw 12 is connected to the middle part of the rear end of the tightening hand 13; by screwing the tightening hand 13, the tightening screw 12 can be rotated, and the tightening screw 12 can be screwed with the tightening screw groove frame 11, so that the tightening screw 12 can act on the contact sleeve 14 to tighten it, so that the contact sleeve 14 is connected to the height adjustment screw 4 and is fixed circumferentially, thereby improving stability.

[0026] It also includes a baffle 15, and the lower side of each group of constraint rails 9 at the inner end of the support frame 2 is respectively connected to the outer end of a group of baffles 15; the baffle 15 can block the lower side of the slider 10 on that side to prevent the slider 10 from sliding down on the inner side of the constraint rail 9, thereby improving reliability.

[0027] The vehicle body structure includes a steering shaft 16, a wheel box 17 and a roller 18. The four corner sides of the bottom end of the mowing cover 1 are rotatably connected to the middle part of the top end of a group of wheel boxes 17 through a group of steering shafts 16, and a group of rollers 18 are rotatably connected to the inner side of each group of wheel boxes 17. The four groups of mowing heads 8 are constrained to roll on the ground by the wheel boxes 17, and the steering shaft 16 constrains the wheel boxes 17 to steer, so the mowing cover 1 can be connected and moved at will, thereby improving convenience.

[0028] The utility model also includes brake pads 19 and pedal pads 20. A group of brake pads 19 are movably connected to the inner side of each group of wheel boxes 17. The output end of the brake pads 19 is in clutch contact with the outer side of the roller 18. The outer side of each group of brake pads 19 is connected to the inner side of a group of pedal pads 20. By stepping on the pedal pads 20, the brake pads 19 can be moved to act on the outer side of the roller 18 to stop the roller 18, so as to fix the position and improve the stability.

[0029] It also includes a push handle frame 21 and a handle bar 22. The rear side of the top of the mowing cover 1 is connected to the bottom of the push handle frame 21, and the upper side of the inside of the push handle frame 21 is connected to both sides of the handle bar 22. By holding the handle bar 22, the mowing cover 1 can be connected to the push handle frame 21 to move the entire device, thereby improving convenience.

[0030] In summary, when a mower head height adjustment device is used, the height adjustment screw rod 4 can be rotated by twisting the screw plate 5, and the height adjustment screw rod 4 is screwed with the threaded sleeve 3, and the circumferential movement of the connecting frame 6 is constrained by two sets of sliders 10 and the constraint rail 9, so that the connecting frame 6 slides and rises and falls on the inner side of the constraint rail 9 through the sliders 10 on both sides, thereby driving the mower head 8 to rise and fall accordingly, and after the height adjustment screw rod 4 stops rotating at the corresponding height, the tightening screw rod 12 can be rotated by twisting the tightening screw hand 13, and the tightening screw rod 12 can be screwed with the tightening screw groove frame 11, so that the tightening screw rod 12 can act on the contact sleeve 14 to tighten, so that the contact sleeve 14 is connected to the height adjustment screw rod 4 circumferentially. The mowing cover 1 can be connected to the lawn and moved on the grass, and the mowing drive motor 7 can be operated to drive the mowing head 8 to rotate, so that the grass is cut and trimmed at the height. In addition, the blocking piece 15 can block the lower side of the slider 10 on the side to prevent the slider 10 from sliding down on the inner side of the constraint rail 9. By stepping on the pedal 20, the brake pad 19 can be activated to act on the outer side of the roller 18 to stop it, so that the position is fixed and the stability is improved.

[0031] This mowing drive motor 7 is a well-known device purchased directly from the market by those skilled in the art. Here we just use it without making any structural or functional improvements to it, so we will not go into details here.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lawn mower cutter head height adjustment device, characterized in that: The utility model comprises a mowing cover (1), a support frame (2), a threaded sleeve (3), a height adjustment screw rod (4), a screw plate (5), a connecting frame (6), a mowing drive motor (7), a mowing cutter head (8), a restraining rail (9) and a sliding block (10), wherein the middle part of the top end of the mowing cover (1) is connected to the bottom end of the support frame (2), the inner side of the middle part of the top end of the support frame (2) is connected to the outer side of the threaded sleeve (3), the inner wall of the threaded sleeve (3) is screwed to the outer wall of the height adjustment screw rod (4), the top end of the height adjustment screw rod (4) is connected to the middle part of the bottom end of the screw plate (5), and the height adjustment screw rod (4) is connected to the middle part of the bottom end of the screw plate (5). The bottom end of the high screw rod (4) is rotatably connected to the middle of the top end of the connecting frame (6), the bottom end inside the connecting frame (6) is connected to the bottom end of the mowing drive motor (7), the output end of the mowing drive motor (7) is connected to the middle of the top end of the mowing cutter head (8), the mowing cutter head (8) is located inside the mowing cover (1), the middle of the left and right sides of the connecting frame (6) are respectively connected to the inner ends of a group of sliding blocks (10), the middle of the left and right ends inside the support frame (2) are respectively vertically connected to the outer sides of a group of restraint rails (9), and a vehicle body structure is arranged at the bottom of the mowing cover (1).

2. A lawn mower cutter head height adjustment device according to claim 1, characterized in that: It also comprises a tightening screw groove frame (11), a tightening screw rod (12), a tightening hand (13) and a contact sleeve (14); the lower outer side of the height adjustment screw rod (4) is connected to the inner side of the contact sleeve (14); the middle front side of the top end of the connecting frame (6) is connected to the bottom end of the tightening screw groove frame (11); the inner wall of the tightening screw groove frame (11) is screwed to the outer wall of the tightening screw rod (12); the front end of the tightening screw rod (12) is connected to the middle part of the rear end of the tightening hand (13).

3. The lawn mower cutter head height adjustment device according to claim 1, characterized in that: It also includes a baffle (15), and the lower side of each group of constraint rails (9) at the inner end of the support frame (2) is respectively connected to the outer end of a group of baffles (15).

4. The lawn mower cutter head height adjustment device according to claim 1, characterized in that: The vehicle body structure comprises a steering shaft (16), a wheel box (17) and a roller (18); the four corner sides of the bottom end of the mowing cover (1) are rotatably connected to the middle of the top end of a group of wheel boxes (17) via a group of steering shafts (16); and a group of rollers (18) are rotatably connected to the inner side of each group of wheel boxes (17).

5. A lawn mower cutter head height adjustment device according to claim 4, characterized in that: It also includes brake pads (19) and pedal pads (20), wherein the inner side of each group of wheel boxes (17) is movably connected to a group of brake pads (19), the output end of the brake pads (19) is in clutch contact with the outer side of the roller (18), and the outer side of each group of brake pads (19) is connected to the inner side of a group of pedal pads (20).

6. The lawn mower cutter head height adjustment device according to claim 1, characterized in that: It also comprises a push handle frame (21) and a handle bar (22), wherein the rear side of the top end of the mowing cover (1) is connected to the bottom end of the push handle frame (21), and the upper side of the push handle frame (21) is connected to both sides of the handle bar (22).

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