Header four-point suspension height adjusting mechanism

Abstract

The utility model relates to the field of mowers, and discloses a header four-point suspension height adjusting mechanism, which comprises a cutting table and is characterized in that a tensioning wheel is rotatably arranged on the top surface of the cutting table, fixed bases are fixed on the top surface of the cutting table, a connecting plate is rotatably arranged between the fixed bases, and the connecting plate is fixed on the top surface of the cutting table. Connecting rods are rotationally arranged on the two sides of the fixed base respectively, pushing folded plates are rotationally arranged on the connecting rods, a coherence rod is rotationally arranged on one side of each pushing folded plate, a connecting folded plate is rotationally arranged at the other end of each coherence rod, and a tension spring is arranged on one side of each movable tensioning swing arm. In the use process, when the cutting table is located at the lowest position, the tensioning force borne by the belt is the maximum, when the cutting table is located at the middle gear position, the tensioning force borne by the belt is moderate, when the cutting table is located at the highest position, the tensioning force borne by the belt is low, and a worker can select a proper gear to work according to actual needs; and the service life of the belt is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a four-point suspension height adjustment mechanism for a cutting platform. Background Art

[0002] A lawn mower, also known as a weed cutter, lawn mower, lawn trimmer, etc., is a mechanical tool used to trim lawns, vegetation, etc. A traditional lawn mower consists of a blade, a gear box, a frame, a power assembly, etc. The blade is installed on the gear box, the gear box is installed on the frame, and the power assembly is connected to the drive shaft of the gear box. The blade rotates at high speed driven by the power assembly to achieve the weed cutting operation.

[0003] According to the Chinese patent with publication number: CN220342916U, the invention comprises a frame, casters, a roller, a cutter assembly, a gear box, a belt, a tension spring, and a tension wheel assembly. The bearing seats of the three cutter assemblies are fixed on the frame, the gear box is fixed on the gear box seat of the frame, a pulley is fixed on the lower output shaft of the gear box, the sleeve of the tension wheel assembly is hinged with the tension seat of the frame, the pulley of the gear box and the pulley of the tension wheel assembly and the pulley of the cutter assembly are connected by a belt, the rotation speed inputted by the input shaft of the gear box can make each cutter rotate along the axis of its own main shaft through the belt transmission, the two ends of the tension spring are respectively hung on the tension frame of the tension wheel assembly and the tension spring seat of the frame, casters are installed on the caster seats on both sides of the front end of the frame, and the roller is connected to the roller frame at the rear end of the frame through a seat bearing.

[0004] In the above scheme, belt drive is adopted. Belt drive has good flexibility and elasticity, but it still has the following disadvantages: since the belt length remains unchanged, when the cutting platform is descending, the tensioning wheel on the dynamic tensioning swing arm will synchronously swing backward, and the stroke of the dynamic tensioning spring will synchronously increase, so that the belt is subjected to greater force, which affects the service life of the belt 11. Utility Model Content

[0005] The utility model aims to provide a four-point suspension height adjustment mechanism for a cutting platform, so as to solve the problem that due to the unchanged belt length, when the cutting platform is descending, the tensioning wheel on the dynamic tensioning swing arm will synchronously swing backward, the dynamic tensioning spring stroke will synchronously increase, the belt will be subjected to greater force, and the service life of the belt will be affected.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a four-point suspension height adjustment mechanism of a cutting table, including a cutting table, characterized in that a tensioning wheel is rotatably arranged on the top surface of the cutting table, a fixed base is fixed on the top surface of the cutting table, a connecting plate is rotatably arranged between the fixed bases, connecting rods are rotatably arranged on both sides of the fixed base, a pushing folding plate is rotatably arranged on the connecting rod, a coordinating rod is rotatably arranged on one side of the pushing folding plate, a connecting folding plate is rotatably arranged on the other end of the coordinating rod, a dynamic tensioning swing arm is rotatably arranged on one end of the connecting folding plate, a tension spring is arranged on one side of the dynamic tensioning swing arm, a fixed column is fixed on the top surface of the cutting table, the surface of the fixed column is slidably inserted with one end of the tension spring, and a belt is wrapped around the surface of the tensioning wheel.

[0007] Preferably, a secondary turntable is rotatably provided on the top surface of the cutting table, a driven turntable is rotatably provided on the top surface of the cutting table, and a linkage turntable is rotatably provided on the top surface of the cutting table, and the surfaces of the secondary turntable, the driven turntable and the linkage turntable are wound and fitted with a belt.

[0008] Preferably, a protective cover is fixed to the top surface of the cutting table, and a protective cover is fixed to the top surface of the cutting table.

[0009] Preferably, a connecting bar is fixed to one side of the cutting table, and a blocking frame is fixed to the bottom surface of the connecting bar.

[0010] Preferably, a plurality of fixing plates are arranged on the surface of the cutting table, wherein two fixing plates form a group, and rollers are rotatably arranged between the fixing plates in each group.

[0011] Preferably, when the angle between the connecting plate and the horizontal line is a negative value, it is a low gear, when the connecting plate is parallel to the horizontal line, it is a mid-range, and when the angle between the connecting plate and the horizontal line is a positive value, it is a high gear.

[0012] Compared with the prior art, a header four-point suspension height adjustment mechanism adopting the above technical solution has the following beneficial effects:

[0013] 1. When the cutting table is descending, it will also move synchronously, so that the spacing of the power output end is increased. At the same time, the dynamic tensioning swing arm and the tensioning wheel will swing backward, and in the process of swinging backward, the tension spring will be extended, and the force on the belt will be increased. Therefore, when the cutting table is in the lowest position, the tension on the belt is the largest. When the cutting table is in the middle position, the tension on the belt is moderate. When the cutting table is in the highest position, the tension on the belt is low. The staff can select the appropriate gear to work according to actual needs, which increases the service life of the belt.

[0014] Second, the belt will slide on the surface of the secondary turntable, the driven turntable and the linkage turntable during operation, and drive the secondary turntable, the driven turntable and the linkage turntable to rotate synchronously with the rotation of the tensioning wheel. Since the tensioning wheel, the secondary turntable, the driven turntable and the linkage turntable are respectively arranged inside the protective cover and the protective cover, the staff is prevented from contacting with the rotating tensioning wheel, the secondary turntable, the driven turntable and the linkage turntable, thereby increasing the safety of the staff during use;

[0015] 3. When the cutting table moves on the lawn, the cutting table will use rollers to contact the lawn, making it easier for the staff to push the cutting table to move on the lawn. When trimming the grass on the lawn, the cut grass sections will be thrown away due to inertia, and the thrown grass sections will be blocked by the blocking frame. Therefore, the grass sections will be blocked by the blocking frame and slide down, and the staff will centrally handle them, which can avoid the cut grass clippings from flying around, and increase the neatness of the lawn after cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the embodiment.

[0017] Figure 2 It is a schematic diagram of the disassembly of the embodiment.

[0018] Figure 3 A side view of an embodiment.

[0019] Figure 4 A top view of the embodiment.

[0020] In the figure: 1. cutting table; 2. tensioning wheel; 3. fixed base; 4. connecting plate; 5. connecting rod; 6. pushing folding plate; 7. coherent rod; 8. connecting folding plate; 9. dynamic tensioning swing arm; 10. tension spring; 11. belt; 12. secondary turntable; 13. driven turntable; 14. linkage turntable; 15. fixed column; 16. protective cover; 17. protective cover; 18. connecting strip; 19. blocking frame; 20. fixed plate; 21. roller. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3As shown, a four-point suspension height adjustment mechanism for a cutting platform comprises a cutting platform 1, a tensioning wheel 2 is rotatably provided on the top surface of the cutting platform 1, a fixed base 3 is fixed on the top surface of the cutting platform 1, a connecting plate 4 is rotatably provided between the fixed bases 3, connecting rods 5 are rotatably provided on both sides of the fixed base 3, a pushing folding plate 6 is rotatably provided on the connecting rod 5, a coordinating rod 7 is rotatably provided on one side of the pushing folding plate 6, a connecting folding plate 8 is rotatably provided on the other end of the coordinating rod 7, a dynamic tensioning swing arm 9 is rotatably provided on one end of the connecting folding plate 8, a tension spring 10 is provided on one side of the dynamic tensioning swing arm 9, a fixed column 15 is fixed on the top surface of the cutting platform 1, the surface of the fixed column 15 is slidably inserted with one end of the tension spring 10, a belt 11 is wrapped around the surface of the tensioning wheel 2, a low gear is when the angle between the connecting plate 4 and the horizontal line is negative, a medium gear is when the connecting plate 4 is parallel to the horizontal line, and a high gear is when the angle between the connecting plate 4 and the horizontal line is positive.

[0023] During use, as the cutting table 1 descends, the cutting table 1 will also translate synchronously, increasing the spacing between the power output ends. At the same time, the dynamic tensioning swing arm 9 and the tensioning wheel 2 will swing backward, and in the process of swinging backward, the tension spring 10 will be extended, and the force on the belt 11 will increase. Therefore, when the cutting table 1 is in the lowest position, the tensioning force on the belt 11 is the largest. When the cutting table 1 is in the middle position, the tensioning force on the belt 11 is moderate. When the cutting table 1 is in the highest position, the tensioning force on the belt 11 is low. The staff can select a suitable gear to work according to actual needs, thereby increasing the service life of the belt 11.

[0024] like Figure 4 As shown, a secondary turntable 12 is rotatably provided on the top surface of the cutting table 1, a driven turntable 13 is rotatably provided on the top surface of the cutting table 1, and a linkage turntable 14 is rotatably provided on the top surface of the cutting table 1. The surfaces of the secondary turntable 12, the driven turntable 13 and the linkage turntable 14 are wound and fitted with the belt 11, a protective cover 16 is fixed on the top surface of the cutting table 1, and a protective cover 17 is fixed on the top surface of the cutting table 1.

[0025] During use, the belt 11 will slide on the surfaces of the secondary turntable 12, the driven turntable 13 and the interlocking turntable 14 during operation, and drive the secondary turntable 12, the driven turntable 13 and the interlocking turntable 14 to rotate synchronously with the rotation of the tensioning wheel 2. Since the tensioning wheel 2, the secondary turntable 12, the driven turntable 13 and the interlocking turntable 14 are respectively arranged inside the protective cover 16 and the protective cover 17, the staff is prevented from contacting with the rotating tensioning wheel 2, the secondary turntable 12, the driven turntable 13 and the interlocking turntable 14, thereby increasing the safety of the staff during use.

[0026] like Figure 3 and Figure 4As shown, a connecting strip 18 is fixed to one side of the cutting table 1, a blocking frame 19 is fixed to the bottom of the connecting strip 18, and a plurality of fixing plates 20 are arranged on the surface of the cutting table 1, wherein two fixing plates 20 form a group, and a roller 21 is rotatably arranged between each group of fixing plates 20.

[0027] During use, when the cutting table 1 moves on the lawn, the cutting table 1 will contact the lawn using the rollers 21, making it easier for the staff to push the cutting table 1 to move on the lawn. When the grass on the lawn is trimmed, the cut grass sections will be thrown away due to inertia, and the thrown grass sections will be blocked by the blocking frame 19. Therefore, the grass sections will be blocked by the blocking frame 19 and slide down, and can be processed centrally by the staff, which can prevent the cut grass clippings from flying around, thereby increasing the neatness of the lawn after cutting.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A four-point suspension height adjustment mechanism for a cutting table, comprising a cutting table (1), characterized in that: A tensioning wheel (2) is rotatably provided on the top surface of the cutting table (1), a fixed base (3) is fixed on the top surface of the cutting table (1), a connecting plate (4) is rotatably provided between the fixed bases (3), connecting rods (5) are rotatably provided on both sides of the fixed base (3), a pushing folding plate (6) is rotatably provided on the connecting rod (5), a coordinating rod (7) is rotatably provided on one side of the pushing folding plate (6), a connecting folding plate (8) is rotatably provided on the other end of the coordinating rod (7), a dynamic tensioning swing arm (9) is rotatably provided on one end of the connecting folding plate (8), a tension spring (10) is provided on one side of the dynamic tensioning swing arm (9), a fixed column (15) is fixed on the top surface of the cutting table (1), a surface of the fixed column (15) is slidably inserted with one end of the tension spring (10), and a belt (11) is wrapped around the surface of the tensioning wheel (2).

2. The four-point suspension height adjustment mechanism for a header according to claim 1, characterized in that: A secondary turntable (12) is rotatably provided on the top surface of the cutting table (1), a driven turntable (13) is rotatably provided on the top surface of the cutting table (1), and a linkage turntable (14) is rotatably provided on the top surface of the cutting table (1), and the surfaces of the secondary turntable (12), the driven turntable (13) and the linkage turntable (14) are wound and fitted with the belt (11).

3. The four-point suspension height adjustment mechanism for a header according to claim 1 is characterized by: A protective cover (16) is fixed on the top surface of the cutting table (1), and a protection cover (17) is fixed on the top surface of the cutting table (1).

4. The four-point suspension height adjustment mechanism for a header according to claim 1 is characterized by: A connecting strip (18) is fixed to one side of the cutting table (1), and a blocking frame (19) is fixed to the bottom surface of the connecting strip (18).

5. The four-point suspension height adjustment mechanism for a header according to claim 1, characterized in that: The surface of the cutting table (1) is provided with a plurality of fixed plates (20), wherein two of the fixed plates (20) form a group, and a roller (21) is rotatably provided between each group of the fixed plates (20).

6. The four-point suspension height adjustment mechanism for a header according to claim 1, characterized in that: When the angle between the connecting plate (4) and the horizontal line is a negative value, it is a low gear; when the connecting plate (4) is parallel to the horizontal line, it is a medium gear; and when the angle between the connecting plate (4) and the horizontal line is a positive value, it is a high gear.

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