A lawn mower mowing height adjustment device

Abstract

The invention discloses a lawn mower mowing height adjustment device, comprising a cutting table, a cutting table hanging mechanism, a cutting table height adjustment component 1, a cutting table height adjustment component 2, a limiting mechanism 1, and a limiting mechanism 2. The cutting table is connected to the lower part of the frame of the lawn mower through the cutting table hanging mechanism, the cutting table hanging mechanism is connected to the cutting table height adjustment component 2, the cutting table height adjustment component 1, the cutting table height adjustment component 2, the limiting mechanism 1, and the limiting mechanism 2 are respectively connected to the upper part of the frame, the cutting table height adjustment component 1, and the cutting table height adjustment component 2 are respectively connected to the opposite sides of the limiting mechanism 1, and the limiting mechanism 2 is clamped with the limiting mechanism 1 at the side of the connection between the cutting table height adjustment component 2 and the limiting mechanism 1. Through the cooperation between the various mechanisms and components, the operator can adjust the height of the cutting table in the working operation area, simplifying the operation steps, reducing the labor intensity, improving the work efficiency, increasing the safety, ensuring the coordination of the cut lawn, and improving the aesthetics.

Description

Technical Field

[0001] The invention relates to the field of agricultural production equipment, in particular to a lawn mower mowing height adjustment device. Background Art

[0002] At present, commercial-grade lawn mowers on the market are mainly aimed at lawn maintenance companies, gardening bureaus and other units that need to mow and maintain large areas of lawns. Since the mowing height requirements for different lawns are not consistent, lawn mowers are required to be able to adjust the mowing height.

[0003] The existing commonly used mowing height adjustment mechanism consists of two parts: the highest point locking and the mowing height adjustment. Before adjusting the mowing height, the cutting table must be adjusted to the highest point to the locking position, and then the limit pin is inserted into the limit hole corresponding to the mowing height to be adjusted. Then the lock of the cutting table is removed, and the cutting table is lowered. The required mowing height is ensured by the previously adjusted limit pin. This height adjustment method requires workers to adjust all four attachment points when debugging the mowing height of the lawn mower, which is very cumbersome and labor-intensive, affecting mowing efficiency. Summary of the invention

[0004] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a lawn mower mowing height adjustment device to simplify the debugging steps, improve mowing efficiency and reduce labor consumption.

[0005] Technical solution: A lawn mower mowing height adjustment device includes a cutting table, a cutting table hanging mechanism, a cutting table height adjustment component 1, a cutting table height adjustment component 2, a limiting mechanism 1, and a limiting mechanism 2. The cutting table is connected to the lower part of the frame of the lawn mower through the cutting table hanging mechanism, the cutting table hanging mechanism is connected to the cutting table height adjustment component 2, the cutting table height adjustment component 1, the cutting table height adjustment component 2, the limiting mechanism 1, and the limiting mechanism 2 are respectively connected to the upper part of the frame, the cutting table height adjustment component 1 and the cutting table height adjustment component 2 are respectively connected to the opposite sides of the limiting mechanism 1, and the limiting mechanism 2 is clamped with the limiting mechanism 1 on the side of the connection between the cutting table height adjustment component 2 and the limiting mechanism 1.

[0006] Furthermore, the harvester mounting mechanism includes two harvester front hanging plates, two harvester rear hanging plates, lifting rings, and locking nuts, the two harvester front hanging plates being symmetrically arranged in the horizontal direction at the front of the upper surface of the harvester, one end of each harvester front hanging plate being connected to the frame, and the other end being connected to the harvester; the two harvester rear hanging plates being symmetrically arranged in the horizontal direction at the rear of the upper surface of the harvester, one end of each harvester rear hanging plate being connected to the frame, and the other end being connected to the harvester; the two lifting rings are respectively vertically arranged on opposite sides of the harvester height adjustment component 2, the upper part of each lifting ring is respectively connected to the harvester height adjustment component 2 through one of the locking nuts, the end of each lifting ring is connected to the frame, and the ring is connected to the harvester.

[0007] Furthermore, the two front hanging plates of the cutting platform and the two rear hanging plates of the cutting platform are parallel to each other, and the length of the line AB formed by the connection point A of the front hanging plate of the cutting platform and the frame and the connection point B of the cutting platform is equal to the length of the line CD formed by the connection point C of the rear hanging plate of the cutting platform and the frame and the connection point D of the cutting platform.

[0008] Furthermore, the cutting platform height adjustment component includes a foot-operated swing arm, a foot-operated connecting rod, a foot pedal, and a connecting plate. The foot-operated swing arm is placed vertically, and the foot-operated connecting rod and the foot pedal are arranged in parallel and spaced apart on the same side of the foot-operated swing arm and are respectively connected to the foot-operated swing arm. The other end of the foot-operated connecting rod is connected to the frame, one end of the connecting plate is connected to the other side of the foot-operated swing arm, and the other end of the connecting plate is connected to the limiting mechanism.

[0009] Furthermore, the second height adjustment component of the cutting platform includes a height adjustment rocker arm, a height adjustment connecting rod, and a connecting rocker arm. The height adjustment rocker arms are provided with two, which are respectively connected to the two ends of the height adjustment connecting rod. The two height adjustment rocker arms are respectively hinged to the frame. One end of the connecting rocker arm is connected to the limiting mechanism 1, and the other end is connected to the corresponding end of the height adjustment connecting rod. The two height adjustment rocker arms are respectively connected to the cutting platform hanging mechanism.

[0010] Furthermore, the limiting mechanism 1 includes a height limiting plate, a slider, a limiting bolt, and a limiting washer. The height limiting plate is placed vertically, one end of which is connected to the cutter height adjusting component 1, and the other end is connected to the cutter height adjusting component 2. A long groove is opened in the horizontal direction on the height limiting plate, one side of the slider is passed through the long groove and is limited in the long groove by two limiting bolts arranged at intervals, and the limiting washer is respectively arranged between the connecting surface of each limiting bolt and the slider, the slider is connected to the frame, a notch is arranged on one side of the height limiting plate, and the limiting mechanism 2 is clamped with the height limiting plate at the notch.

[0011] Furthermore, the second limiting mechanism includes a knob, a rotating shaft, a connecting column, a rotation limiting plate, a knob fixing seat, a ball screw, a fixing bolt, and a rotating bearing. The rotating shaft is placed vertically, with its upper end connected to the knob, and its lower end fixed to the connecting column by the fixing bolt. The rotation limiting plate is sleeved on the outer circumferential surface of the connecting column and fixed. The connecting column is passed through the knob fixing seat and connected to the knob fixing seat by the rotating bearing. The ball screw is installed on the knob fixing seat. A plurality of through holes are opened on the rotation limiting plate. The ball screw is clamped in one of the through holes. The outer ring of the rotation limiting plate is clamped with the limiting mechanism one, and the knob fixing seat is connected to the frame.

[0012] Furthermore, the second limiting mechanism also includes an oil ring, and the oil ring is installed on the end of the rotating bearing at the connection between the connecting column and the rotating bearing.

[0013] Furthermore, a plurality of through holes are distributed in a circular pattern on the rotation limiting plate.

[0014] Furthermore, the outer ring of the rotation limit plate is of a special-shaped structure, and a plurality of inwardly concave arc grooves are distributed on the outer ring, and the limiting mechanism is clamped with the rotation limit plate at one of the arc grooves.

[0015] Beneficial effects: Compared with the prior art, the advantages of the present invention are: through the cooperation between various mechanisms and components, the operator can adjust the height of the cutting table in the working operation area, which simplifies the operating steps, reduces labor intensity, improves work efficiency and increases safety; by using this device, while ensuring that the cutting table is suitable for mowing operations with various height requirements, it can also ensure the coordination of the cut lawn and improve the aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a side structural diagram of the present invention;

[0018] Figure 3 It is a top view of the second limiting mechanism;

[0019] Figure 4 for Figure 3 GG cross-sectional view;

[0020] Figure 5 It is a structural schematic diagram of the limiting mechanism 1;

[0021] Figure 6 is a connection cross-sectional view of the limiting mechanism 1;

[0022] Figure 7 This is a side view of the device installed on the frame, with the header adjusted to the highest position;

[0023] Figure 8 for Figure 7 A top view of

[0024] Fig. 9 This is a side view of the device installed on the frame, with the header adjusted to the lowest position;

[0025] Fig.10 for Fig. 9 Top view of the . DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0027] A lawn mower mowing height adjustment device, such as Figures 1 to 10 As shown, it includes a cutting platform 1, a cutting platform hanging mechanism 2, a cutting platform height adjustment component 1 3, a cutting platform height adjustment component 2 4, a limiting mechanism 1 5, a limiting mechanism 2 6, and a frame 7 of a lawn mower. The cutting platform hanging mechanism 2 includes two cutting platform front hanging plates 21, two cutting platform rear hanging plates 22, a lifting ring 23, and a locking nut 24, respectively. The cutting platform height adjustment component 1 3 includes a foot swing arm 31, a foot connecting rod 32, a foot pedal 33, and a connecting plate 34. The cutting platform height adjustment component 2 4 includes a height adjustment rocker arm 41, a height adjustment connecting rod 42, and a connecting rocker arm 43. The limiting mechanism 1 5 includes a height adjustment limit plate 51, a slider 52, a limit bolt 53, and a limit washer 54. The limit mechanism 2 6 includes a knob 61, a rotating shaft 62, a connecting column 63, a rotating limit plate 64, a knob fixing seat 65, a ball screw 66, a fixing bolt 67, a rotating bearing 68, and an oil ring 69.

[0028] The cutting platform 1 is arranged at the lower part of the frame 7, and two cutting platform front hanging plates 21 are symmetrically arranged at intervals in the horizontal direction at the front part of the upper surface of the cutting platform 1, one end of each cutting platform front hanging plate 21 is connected to the frame 7, and the other end is connected to the cutting platform 1; two cutting platform rear hanging plates 22 are symmetrically arranged at intervals in the horizontal direction at the rear part of the upper surface of the cutting platform 1, one end of each cutting platform rear hanging plate 22 is connected to the frame 7, and the other end is connected to the cutting platform 1.

[0029] The cutting platform height adjustment component 2 4 is arranged at the rear part of the cutting platform hanging mechanism 2, and two lifting rings 23 are respectively vertically arranged at the two ends of the height adjustment connecting rod 42. There are two height adjustment rocker arms 41, which are respectively connected to the two ends of the height adjustment connecting rod 42 and are respectively connected to the upper part of a corresponding lifting ring 23 through a locking nut 24. The end of each lifting ring 23 is connected to the frame 7, and the ring part is connected to the cutting platform 1. The two height adjustment rocker arms 41 are respectively hinged to the frame 7.

[0030] The limiting mechanism 5 is arranged on the side of one end of the connecting rocker arm 43, one end of the connecting rocker arm 43 is connected to the end of the height adjustment connecting rod 42, and the other end is connected to one end of the height adjustment limiting plate 51. A long groove 511 is opened on the height adjustment limiting plate 51 in the horizontal direction. One side of the slider 52 is penetrated into the long groove 511 and is limited in the long groove 511 by two spaced limiting bolts 53. A limiting washer 54 is respectively provided between the connecting surface of each limiting bolt 53 and the slider 52, and the slider 52 is connected to the frame 7.

[0031] The cutting table height adjustment component 3 is arranged at the other end of the high limit plate 51, the foot pedal arm 31 is placed vertically, the foot pedal connecting rod 32 and the foot pedal 33 are arranged in parallel and spaced apart on the same side of the foot pedal arm 31 and are respectively connected to the foot pedal arm 31, the other end of the foot pedal connecting rod 32 is connected to the frame 7, one end of the connecting plate 34 is connected to the other side opposite to the foot pedal arm 31, and the other end of the connecting plate 34 is connected to the other end of the high limit plate 51.

[0032] The limiting mechanism 2 6 is arranged on the side of the connection between the header height adjustment component 2 4 and the limiting mechanism 1 5. The rotating shaft 62 is placed vertically, and its upper end is connected to the knob 61, and the lower end is fixed to the connecting column 63 by a fixing bolt 67. The rotating limiting plate 64 is sleeved on the outer circumference of the connecting column 63 and fixed. The connecting column 63 is inserted into the knob fixing seat 65 and connected to the knob fixing seat 65 through a rotating bearing 68. The oil ring 69 is installed at the end of the rotating bearing 68 at the connection between the connecting column 63 and the rotating bearing 68. The ball screw 66 is installed on the knob fixing On the upper surface of the seat 65, a plurality of through holes 641 are provided on the rotation limit plate 64, and the plurality of through holes 641 are distributed in a circle on the rotation limit plate 64. The ball screw 66 is clamped in one of the through holes 641. The outer ring of the rotation limit plate 64 is a special-shaped structure, and a plurality of concave arc grooves 642 are distributed on the outer ring. A notch is provided on one side of the height adjustment limit plate 51 relative to the rotation limit plate 64, and the notch is connected to one of the arc grooves 642, so that the height adjustment limit plate 51 is clamped with the rotation limit plate 64, and the knob fixing seat 65 is connected to the frame 7.

[0033] The two front hanging plates of the cutting platform and the two rear hanging plates of the cutting platform are parallel to each other. The length of the line AB formed by the connection point A of the front hanging plate of the cutting platform and the frame and the connection point B of the cutting platform is equal to the length of the line CD formed by the connection point C of the rear hanging plate of the cutting platform and the frame and the connection point D of the cutting platform. The lines ABDC are connected in sequence to form a parallelogram. According to the horizontal angle of one side of the known parallelogram and the fixed length of the four sides, no matter how the internal angle of the quadrilateral changes, the angle of the other side parallel to the known side is always constant. According to this principle, when the cutting platform is mowing at any cutting width, the forward tilt angle of the cutting platform remains unchanged to realize the mowing principle of the cutting platform with low front and high back.

[0034] When you need to adjust the mowing height, first step on the foot pedal, and use the foot pedal swing arm to drive the connecting plate to move, so that the height limit plate and the connecting rocker arm move forward in sequence, and the two height adjustment swing arms are driven counterclockwise by the height adjustment connecting rod, and the cutting table is raised to the highest position through the lifting ring. According to the required mowing height, the rotating knob is used to synchronously drive the angle of the rotating limit plate to the indicated cutting position, and then the foot leaves the foot pedal position. Under the action of gravity, the cutting table drives the height limit plate through the height adjustment rocker arm to return to the arc groove of the rotating limit plate and re-engage it, and the ball screw is re-engaged in the appropriate through hole. At this time, the cutting table reaches the required mowing height.

[0035] When the foot pedal is stepped on to raise the cutting table to the highest point, the height limit plate moves forward and away from the knob positioning plate under the drive of the foot swing arm. Turn the height knob, and the rotation limit plate rotates accordingly. When it is adjusted to a mowing height, the through hole of the rotation limit plate coincides with the center of the ball screw, and the steel ball on the ball screw bounces into the through hole under the action of the internal spring. Continue to rotate the knob, and the steel ball is pressed back into the ball screw. When the required mowing height is adjusted, release the foot and put down the cutting table. The height limit plate moves backward under the drive of the height swing arm and the connecting plate, and hits the through hole of the rotation limit plate for limiting.

[0036] When it is necessary to adjust the height of the cutting platform, step on the foot pedal to raise the cutting platform to the highest position, and at the same time rotate the knob to the lowest cutting width position. Then take your foot off the foot pedal, place the adjustment block under the cutting platform, adjust the position of the locking nut on the lifting ring, and the cutting platform will fall onto the adjustment block under the action of gravity. Finally, repeat the above operation. After adjusting the cutting platform to the highest position, remove the adjustment block, and the height adjustment of the cutting platform is completed.

[0037] Through the coordination between various mechanisms and components, the device enables the operator to adjust the height of the cutting table in the working operation area, thereby simplifying the operating steps, reducing labor intensity, improving work efficiency and increasing safety. By using this device, while ensuring that the cutting table is suitable for mowing operations with various height requirements, the coordination of the cut lawn can be ensured and the aesthetics can be improved.

Claims

1. A lawn mower mowing height adjustment device, characterized in that: The utility model comprises a cutting platform (1), a cutting platform hanging mechanism (2), a cutting platform height adjustment component 1 (3), a cutting platform height adjustment component 2 (4), a limiting mechanism 1 (5), and a limiting mechanism 2 (6), wherein the cutting platform (1) is connected to the lower part of a frame (7) of a lawn mower through the cutting platform hanging mechanism (2), the cutting platform hanging mechanism (2) is connected to the cutting platform height adjustment component 2 (4), the cutting platform height adjustment component 1 (3), the cutting platform height adjustment component 2 (4), the limiting mechanism 1 (5), and the limiting mechanism 2 (6) are respectively connected to the upper part of the frame (7), the cutting platform height adjustment component 1 (3) and the cutting platform height adjustment component 2 (4) are respectively connected to opposite sides of the limiting mechanism 1 (5), and the limiting mechanism 2 (6) is clamped with the limiting mechanism 1 (5) at the side of the connection between the cutting platform height adjustment component 2 (4) and the limiting mechanism 1 (5); The second limiting mechanism (6) comprises a knob (61), a rotating shaft (62), a connecting column (63), a rotation limiting plate (64), a knob fixing seat (65), a ball screw (66), a fixing bolt (67), and a rotating bearing (68). The rotating shaft (62) is placed vertically, with its upper end connected to the knob (61) and its lower end fixed to the connecting column (63) via the fixing bolt (67). The rotation limiting plate (64) is sleeved on the outer peripheral surface of the connecting column (63) and fixed. The connecting column ( 63) is inserted into the knob fixing seat (65) and connected to the knob fixing seat (65) through the rotating bearing (68), the ball screw (66) is installed on the knob fixing seat (65), a plurality of through holes (641) are opened on the rotation limit plate (64), the ball screw (66) is clamped in one of the through holes (641), the outer ring of the rotation limit plate (64) is clamped with the limit mechanism 1 (5), and the knob fixing seat (65) is connected to the frame (7); A plurality of through holes (641) are distributed in a circumferential manner on the rotation limiting plate (64); A plurality of inwardly concave arcuate grooves (642) are distributed on the outer ring of the rotation limiting plate (64), and the limiting mechanism 1 (5) is engaged with the rotation limiting plate (64) at one of the arcuate grooves (642).

2. The lawn mower mowing height adjustment device according to claim 1, characterized in that: The cutting platform hanging mechanism (2) comprises two cutting platform front hanging plates (21), two cutting platform rear hanging plates (22), a lifting ring (23), and a locking nut (24), wherein the two cutting platform front hanging plates (21) are symmetrically arranged at intervals along the horizontal direction at the front of the upper surface of the cutting platform (1), one end of each cutting platform front hanging plate (21) is connected to the frame (7), and the other end is connected to the cutting platform (1); the two cutting platform rear hanging plates (22) are horizontally connected to the rear of the upper surface of the cutting platform (1). The two cutting platforms are symmetrically arranged at intervals in the direction, one end of each cutting platform rear hanging plate (22) is connected to the frame (7), and the other end is connected to the cutting platform (1); the two lifting rings (23) are respectively vertically arranged on the opposite sides of the cutting platform height adjustment component 2 (4), the upper part of each lifting ring (23) is connected to the cutting platform height adjustment component 2 (4) through a locking nut (24), the end of each lifting ring (23) is connected to the frame (7), and the ring part is connected to the cutting platform (1).

3. The lawn mower mowing height adjustment device according to claim 2, characterized in that: The two front cutting platform hanging plates (21) and the two rear cutting platform hanging plates (22) are parallel to each other, and the length of the line AB formed by the connection point A between the front cutting platform hanging plate (21) and the frame (7) and the connection point B between the front cutting platform hanging plate (21) and the cutting platform (1) is equal to the length of the line CD formed by the connection point C between the rear cutting platform hanging plate (22) and the frame (7) and the connection point D between the rear cutting platform hanging plate (22) and the cutting platform (1).

4. The lawn mower mowing height adjustment device according to claim 1, characterized in that: The cutting platform height adjustment component (3) comprises a pedal swing arm (31), a pedal connecting rod (32), a foot pedal (33), and a connecting plate (34). The pedal swing arm (31) is placed vertically. The pedal connecting rod (32) and the foot pedal (33) are arranged in parallel and spaced apart on the same side of the pedal swing arm (31) and are respectively connected to the pedal swing arm (31). The other end of the pedal connecting rod (32) is connected to the frame (7). One end of the connecting plate (34) is connected to the other side of the pedal swing arm (31). The other end of the connecting plate (34) is connected to the limiting mechanism (5).

5. The lawn mower mowing height adjustment device according to claim 1, characterized in that: The second cutting platform height adjustment component (4) comprises a height adjustment rocker arm (41), a height adjustment connecting rod (42), and a connecting rocker arm (43). The height adjustment rocker arms (41) are provided with two, which are respectively connected to the two ends of the height adjustment connecting rod (42). The two height adjustment rocker arms (41) are respectively hinged to the frame (7). One end of the connecting rocker arm (43) is connected to the first limiting mechanism (5), and the other end is connected to the corresponding end of the height adjustment connecting rod (42). The two height adjustment rocker arms (41) are respectively connected to the cutting platform hanging mechanism (2).

6. The lawn mower mowing height adjustment device according to claim 1, characterized in that: The limiting mechanism 1 (5) comprises a height-adjusting limiting plate (51), a sliding block (52), a limiting bolt (53), and a limiting washer (54). The height-adjusting limiting plate (51) is placed vertically, one end of which is connected to the header height-adjusting component 1 (3), and the other end is connected to the header height-adjusting component 2 (4). A long groove (511) is provided on the height-adjusting limiting plate (51) in the horizontal direction. One side of the sliding block (52) is inserted into the long groove (511) and is limited in position in the long groove (511) by two limiting bolts (53) arranged at intervals. A limiting washer (54) is provided between the connecting surface of each limiting bolt (53) and the sliding block (52). The sliding block (52) is connected to the frame (7). A notch is provided on one side of the height-adjusting limiting plate (51). The limiting mechanism 2 (6) is clamped with the height-adjusting limiting plate (51) at the notch.

7. The lawn mower mowing height adjustment device according to claim 1, characterized in that: The second limiting mechanism (6) further comprises an oil ring (69), wherein the oil ring (69) is mounted on the end of the rotating bearing (68) at the connection between the connecting column (63) and the rotating bearing (68).

Images