Header assembly for mower

Abstract

The utility model relates to the technical field of agricultural machinery, and discloses a header assembly for a mower, which comprises a header shell, the outer side of the header shell is fixedly connected with a multi-layer blade cutting mechanism, the outer side of the header shell is fixedly connected with a transmission shell, the inner side of the transmission shell is fixedly connected with a reciprocating cutting mechanism, and the reciprocating cutting mechanism is fixedly connected with the transmission shell. The reciprocating cutting mechanism comprises a driving rotating shaft, a rotating disc is fixedly connected to the outer side of the driving rotating shaft, a driving assembly is fixedly connected to the inner side of the rotating disc, and a first transmission connecting rod is rotationally connected to the outer side of the rotating shaft on the outer side of the rotating disc. According to the utility model, through the reciprocating cutting mechanism, grass stems can be rapidly cut off in the reciprocating motion, the cutting speed is further improved, the phenomena of missing cutting, irregularity and the like are reduced, and the upper and lower layers of blades are enabled to cooperatively work and finely cut weeds by utilizing the gear transmission mechanism, so that the whole weeds do not need to be cut, the labor capacity is greatly reduced, and the working efficiency is improved. And the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field especially, relate to a mower cutting platform subassembly for mower. BACKGROUND

[0002] The mower is a kind of mechanical equipment specially used for trimming lawn, grassland and other vegetation, it is usually composed of engine, transmission device, cutting device and other parts.In daily life, the role of mower is very significant, can efficiently trim all kinds of lawn, keep grassland neat and beautiful, improve environmental ornamental nature.It is widely used, like park, golf course and other large-area greenbelt, can quickly complete the mowing task, save manpower and time;The lawn maintenance of residential area makes the living environment of residents more tidy;School playground, private courtyard and other places can also easily realize convenient mowing operation;

[0003] Mower is mainly composed of engine, transmission system, cutting device, running gear, control system and protection device etc.Engine as power source provides the energy required for running of mower;Transmission system is responsible for transmitting engine power to cutting device and running gear;Cutting device acts directly on turf, realizes mowing action;Running gear enables mower to move on lawn for operation;Control system facilitates operator to control machine operation;Protection device guarantees the safety of operator, prevents grass clippings from splashing and parts from hurting people during mowing;

[0004] In prior art, single-layer cutting knife is difficult to cut flat at one time when facing different height grass, cutting effect is poor, for shorter weeds, mowing needs secondary processing to be used for feeding animals, resulting in large labor intensity of staff and low work efficiency, therefore, a cutting platform subassembly for mower is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a cutting platform subassembly for mower, aims at improving the problems of traditional mower in prior art, such as difficult to cut flat at one time when facing different height grass, poor cutting effect, and mowing needs secondary processing to be used for feeding animals, resulting in large labor intensity of staff and low work efficiency.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] A cutting platform subassembly for mower, including cutting platform shell, the outer side of cutting platform shell is fixedly connected with multilayer blade cutting mechanism, the outer side of cutting platform shell is fixedly connected with transmission shell, the inner side of transmission shell is fixedly connected with reciprocating cutting mechanism;

[0008] The reciprocating cutting mechanism comprises a driving shaft, the outer side of the driving shaft is fixedly connected with a rotating disc, the inner side of the rotating disc is fixedly connected with a driving assembly, the outer side of the rotating shaft of the rotating disc is rotatably connected with a transmission connecting rod one, the outer side of the shaft of the transmission connecting rod one is rotatably connected with a transmission connecting rod two, the inner side of the transmission connecting rod two is provided with two symmetrical sliding grooves, one end of the transmission connecting rod two is slidably connected with a sliding column one in the sliding groove, the outer side of the sliding column one is fixedly connected with a reciprocating push rod one, the other end of the transmission connecting rod two is slidably connected with a sliding column two in the sliding groove, the outer side of the sliding column two is fixedly connected with a reciprocating push rod two, the outer side of the reciprocating push rod two is slidably connected to the inner side of the transmission housing, and the outer side of the reciprocating push rod one is slidably connected to the inner side of the transmission housing.

[0009] As a further description of the above technical scheme:

[0010] The driving assembly comprises a driving motor, the outer side of the driving motor is fixedly connected to the outer side of the cutting platform housing, the driving end of the driving motor is fixedly connected to the outer side of the driving shaft, and the outer side of the driving shaft is rotatably connected to the inner side of the cutting platform housing.

[0011] As a further description of the above technical scheme:

[0012] The inner side of the transmission connecting rod two is rotatably connected with a fixed shaft, and the outer side of the fixed shaft is fixedly connected to the inner side of the transmission housing.

[0013] As a further description of the above technical scheme:

[0014] The outer side of the transmission housing is fixedly connected with a slotted fixed block, the upper and lower sides of the slotted fixed block are provided with I-shaped sliding grooves, the inner side of the I-shaped sliding groove is slidably connected with a reciprocating sliding block, the outer side of the reciprocating sliding block is fixedly connected to the outer side of the reciprocating push rod one, and the outer side of the reciprocating sliding block is fixedly connected to the outer side of the reciprocating push rod two.

[0015] As a further description of the above technical scheme:

[0016] The outer side of the I-shaped sliding groove is fixedly connected with a comb-shaped fixed tooth, the outer side of the reciprocating sliding block is slidably connected to the outer side of the comb-shaped fixed tooth, the outer side of the reciprocating sliding block is fixedly connected with a row of multi-tooth cutters, and the outer side of the multi-tooth cutter is slidably connected to the inner side of the comb-shaped fixed tooth.

[0017] As a further description of the above technical scheme:

[0018] The multi-layer blade cutting mechanism comprises a bevel gear one, the inner side of the bevel gear one is fixedly connected to the outer side of the driving rotating shaft, the inner side of the cutting platform shell is rotationally connected with a transmission rotating shaft, one end of the transmission rotating shaft is fixedly connected with a bevel gear two, the outer side of the bevel gear two is meshingly connected to the outer side of the bevel gear one;

[0019] As a further description of the above technical solution:

[0020] The inner side of the cutting platform shell is fixedly connected with a supporting ring, the inner side of the supporting ring is rotationally connected to the outer side of the transmission rotating shaft, the outer side of the transmission rotating shaft is fixedly connected with a bevel gear three, the inner side of the cutting platform shell is rotationally connected with a cutting rotating shaft, one end of the cutting rotating shaft is fixedly connected with a bevel gear four, the outer side of the bevel gear four is meshingly connected to the outer side of the bevel gear three;

[0021] As a further description of the above technical solution:

[0022] The bottom of the cutting platform shell is fixedly connected with a limiting ring, the bottom of the limiting ring is fixedly connected with a protective cover, the inner side of the limiting ring is rotationally connected to the outer side of the cutting rotating shaft, the bottom of the cutting rotating shaft is fixedly connected with an arc-shaped cutting knife, and the arc-shaped cutting knife is rotationally connected to the inner side of the protective cover.

[0023] The utility model has the advantages of:

[0024] 1、In the utility model, the driving rotating shaft is driven by the driving motor, and the multi-tooth cutter realizes reciprocating sliding in the I-shaped sliding groove through rotating disc, transmission connecting rod and other components, and is tightly matched with the comb-shaped fixed teeth, the reciprocating cutting mode greatly improves the cutting efficiency, the multi-tooth cutter can quickly cut off the grass stems in frequent reciprocating motion due to the multi-tooth structure, and the combing effect of the comb-shaped fixed teeth on the grass stems makes the grass stems orderly enter the cutting range, further improves the cutting speed, and guarantees the cutting quality, no matter what growth condition the grass stems are in, the cutting task can be completed neatly, the lawn after mowing is ensured to be flat and beautiful, and the phenomena of missed cutting and unevenness are reduced, thereby bringing efficient and high-quality results for mowing work.

[0025] 2、In the utility model, through the unique transmission mechanism, the upper and lower blades realize cooperative work, the reciprocating motion of the upper blade can preliminarily cut the higher grass, the lower blade quickly hooks and cuts the lower grass stems due to high-speed rotation, not only completes deep cutting, but also carefully cleans the stubble after upper cutting, thereby guaranteeing the flatness of the cutting surface, the cooperative work mode finely cuts weeds, and the produced fine weeds can be directly used for feeding animals, so that the staff does not need to cut the whole weeds, labor is greatly reduced, work efficiency is improved, and the application scene of mowing results is widened. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of a cutting platform assembly for a mower is provided for the utility model;

[0027] Figure 2 A structure schematic view of a reciprocating sliding block of a cutting platform assembly for a mower is provided for the utility model;

[0028] Figure 3 For Figure 2 An enlarged view of A in the middle;

[0029] Figure 4 A structure schematic view of a limiting ring of a cutting platform assembly for a mower is provided for the utility model;

[0030] Figure 5 For Figure 4 An enlarged view of B in the middle.

[0031] Legend:

[0032] 1, cutting platform shell; 2, transmission shell; 3, drive shaft; 4, drive motor; 5, rotating disc; 6, transmission connecting rod one; 7, transmission connecting rod two; 8, sliding column one; 9, reciprocating push rod one; 10, sliding column two; 11, reciprocating push rod two; 12, fixed shaft; 13, slotted fixed block; 14, I-shaped sliding groove; 15, reciprocating sliding block; 16, multi-tooth cutter; 17, comb-shaped fixed tooth; 18, bevel gear one; 19, bevel gear two; 20, transmission shaft; 21, support ring; 22, bevel gear three; 23, bevel gear four; 24, cutting shaft; 25, limiting ring; 26, arc-shaped cutting knife; 27, protective cover. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] With reference to Figures 1 to 3 , the utility model provides an embodiment: a cutting platform assembly for a mower, including cutting platform shell 1, cutting platform shell 1 has enough strength and rigidity, can bear the various forces and vibration in cutting process, has carried out rustproof and wear -resisting treatment, prolongs its service life, the outside fixed connection of cutting platform shell 1 has multilayer blade cutting mechanism, the outside fixed connection of cutting platform shell 1 has transmission shell 2, transmission shell 2 adopts metal to make, has enough strength and rigidity, prevents dust and grass clippings from entering inside, the inside fixed connection of transmission shell 2 has reciprocating cutting mechanism.

[0035] The reciprocating cutting mechanism comprises a driving shaft 3 made of high-strength steel material, the surface of which is treated for rust prevention and wear resistance, the outer side of the driving shaft 3 is fixedly connected with a rotating disc 5, the rotating movement of the driving shaft 3 is converted into the reciprocating movement of the subsequent components, and the rotating disc 5 is one of the key components for realizing the reciprocating cutting action, the inner side of the rotating disc 5 is fixedly connected with a driving assembly, the outer side of the rotating shaft of the rotating disc 5 is rotatably connected with a transmission connecting rod 1 6, the outer side of the shaft of the transmission connecting rod 1 6 is rotatably connected with a transmission connecting rod 2 7, the transmission connecting rod 1 6 and the transmission connecting rod 2 7 are both made of high-strength metal, the transmission connecting rod 1 6 and the transmission connecting rod 2 7 form a crank connecting rod mechanism, the rotating movement of the rotating disc 5 is converted into the linear reciprocating movement of the subsequent push rod, so as to drive the cutting knife to reciprocate and cut.

[0036] The inner side of the transmission connecting rod 2 7 is provided with two symmetrical sliding grooves, one end of the transmission connecting rod 2 7 is slidably connected with a sliding column 1 8 in the sliding groove, the outer side of the sliding column 1 8 is fixedly connected with a reciprocating push rod 1 9, the other end of the transmission connecting rod 2 7 is slidably connected with a sliding column 2 1 0 in the sliding groove, the outer side of the sliding column 2 1 0 is fixedly connected with a reciprocating push rod 2 1 1, the sliding column 1 8 and the sliding column 2 1 0 are cylindrical metal components made of wear-resistant alloy and can freely slide in the sliding groove, the surface is treated to be smooth and is coated with lubricating grease to reduce sliding friction, improve transmission efficiency, and ensure the flexibility and reliability of transmission, the reciprocating push rod 1 9 and the reciprocating push rod 2 1 1 are long strip-shaped metal rods made of high-strength steel material and have sufficient strength and rigidity, under the drive of the transmission connecting rod 2 7, the reciprocating push rod 1 9 and the reciprocating push rod 2 1 1 make linear reciprocating movement along the inner side of the transmission shell 2 and drive the subsequent cutting knife to reciprocate and cut, realizing the cutting function of grass, the outer side of the reciprocating push rod 2 1 1 is slidably connected to the inner side of the transmission shell 2, and the outer side of the reciprocating push rod 1 9 is slidably connected to the inner side of the transmission shell 2.

[0037] The driving assembly comprises a driving motor 4, which provides a power source for the entire reciprocating cutting mechanism, drives the rotating disc 5 and the connecting rod and other components through the driving shaft 3, realizes the reciprocating cutting action of the cutting knife, and drives the subsequent rotary cutting tool to cut through a series of transmission gears, the outer side of the driving motor 4 is fixedly connected to the outer side of the cutting table shell 1, the driving end of the driving motor 4 is fixedly connected to the outer side of the driving shaft 3, and the outer side of the driving shaft 3 is rotatably connected to the inner side of the cutting table shell 1.

[0038] The inner side of the transmission connecting rod 2 7 is rotatably connected with a fixed shaft 1 2, the fixed shaft 1 2 provides a rotating support point for the transmission connecting rod 2 7, and the outer side of the fixed shaft 1 2 is fixedly connected to the inner side of the transmission shell 2.

[0039] The outer side of the transmission housing 2 is fixedly connected with a slotted fixed block 13, which provides a sliding track for the reciprocating sliding block 15, limits the movement direction of the reciprocating sliding block 15, ensures that the multi-tooth cutter 16 can reciprocate along the predetermined trajectory, and the upper and lower sides of the slotted fixed block 13 are provided with an I-shaped sliding groove 14, which provides a sliding track for the reciprocating sliding block 15, guides the movement of the reciprocating sliding block 15, and ensures the accuracy and stability of the reciprocating cutting action of the multi-tooth cutter 16. The inner side of the I-shaped sliding groove 14 is slidably connected with the reciprocating sliding block 15, which is a connecting component of the multi-tooth cutter 16 and the transmission mechanism, and transmits the linear reciprocating motion of the reciprocating push rod one 9 and the reciprocating push rod two 11 to the multi-tooth cutter 16, drives the multi-tooth cutter 16 to reciprocate, and the outer side of the reciprocating sliding block 15 is fixedly connected to the outer side of the reciprocating push rod one 9 and the outer side of the reciprocating push rod two 11.

[0040] The outer side of the I-shaped sliding groove 14 is fixedly connected with a comb-shaped fixed tooth 17, which cooperates with the multi-tooth cutter 16 during reciprocating motion of the multi-tooth cutter 16, plays a role in combing the stems, makes the stems better enter the cutting range of the multi-tooth cutter 16, improves the cutting efficiency and cutting quality, and at the same time, the comb-shaped fixed tooth 17 can also prevent the stems from winding on the multi-tooth cutter 16, and ensure the normal operation of the cutting mechanism. The outer side of the reciprocating sliding block 15 is slidably connected to the outer side of the comb-shaped fixed tooth 17, and the outer side of the reciprocating sliding block 15 is fixedly connected with a row of multi-tooth cutters 16. The multi-tooth structure of the multi-tooth cutter 16 increases the contact area and cutting times with the stems, and the sharp teeth can cut off the stems. Compared with single-blade cutters, the multi-tooth cutter 16 can cut more stems in one reciprocating motion, thereby significantly improving the efficiency of mowing and reducing the time of mowing operation. The outer side of the multi-tooth cutter 16 is slidably connected to the inner side of the comb-shaped fixed tooth 17.

[0041] Referring to Figure 1 , Figure 4 and Figure 5 , the multi-layer blade cutting mechanism includes a bevel gear one 18, the inner side of which is fixedly connected to the outer side of the driving shaft 3, the inner side of the cutter housing 1 is rotatably connected with a transmission shaft 20, the transmission shaft 20 plays a role in transmitting power and changing the transmission direction, transmits the power from the bevel gear one 18 to the bevel gear three 22, and at the same time, through the support of the support ring 21, ensures the stability of the transmission shaft 20 during rotation. One end of the transmission shaft 20 is fixedly connected with a bevel gear two 19, and the outer side of the bevel gear two 19 is meshingly connected to the outer side of the bevel gear one 18.

[0042] The inner side of the cutter housing 1 is fixedly connected with a support ring 21, which is mainly used for supporting the transmission shaft 20, improving the stability and rigidity of the transmission shaft 20, preventing it from being bent and deformed due to uneven stress during rotation, thereby ensuring the transmission accuracy and reliability of the entire multi-blade cutting mechanism. The inner side of the support ring 21 is rotatably connected to the outer side of the transmission shaft 20. The outer side of the transmission shaft 20 is fixedly connected with a bevel gear three 22. The inner side of the cutter housing 1 is rotatably connected with a cutting shaft 24, which is the final execution component of the multi-blade cutting mechanism. The power transmitted by the bevel gear three 22 is transmitted to the arc-shaped cutting knife 26, driving the arc-shaped cutting knife 26 to rotate at high speed, realizing the cutting of grass. One end of the cutting shaft 24 is fixedly connected with a bevel gear four 23. The outer side of the bevel gear four 23 is meshingly connected to the outer side of the bevel gear three 22. The bevel gear two 19 transmits the power of the bevel gear one 18 to the transmission shaft 20. The bevel gear three 22 transmits the power of the transmission shaft 20 to the bevel gear four 23, realizing the transmission and change of direction of the power, so that the multi-blade cutting mechanism can work normally. The bevel gear four 23 transmits the power of the bevel gear three 22 to the cutting shaft 24, realizing the transmission and change of direction of the power, so that the arc-shaped cutting knife 26 can rotate according to the predetermined direction and speed. As the power input component of the multi-blade cutting mechanism, the bevel gear one 18 transmits the rotary motion of the drive shaft 3 to the bevel gear two 19, thereby driving the entire multi-blade cutting mechanism to operate.

[0043] The bottom of the cutter housing 1 is fixedly connected with a limiting ring 25, which is mainly used for limiting the axial position of the cutting shaft 24, preventing it from falling off and tilting during rotation, and ensuring the stability of the cutting shaft 24 during rotation. The bottom of the limiting ring 25 is fixedly connected with a protective cover 27, which is mainly used for protecting the operator from the rotating arc-shaped cutting knife 26, preventing grass clippings and debris from flying during cutting, and keeping the mowing environment clean. The inner side of the limiting ring 25 is rotatably connected to the outer side of the cutting shaft 24. The bottom of the cutting shaft 24 is fixedly connected with an arc-shaped cutting knife 26, which has extremely high hardness and sharpness, and is the main cutting component of the multi-blade cutting mechanism. It cuts grass stems at high speed to realize the function of mowing. The arc-shaped cutting knife 26 is rotatably connected to the inner side of the protective cover 27.

[0044] Working principle: when the mower works with the cutterbar assembly, the driving motor 4 is started, the driving end drives the driving shaft 3 to rotate, the rotating disc 5 outside the driving shaft 3 rotates, the transmission connecting rod one 6 pushes the transmission connecting rod two 7 to move, the fixed shaft 12 inside the transmission connecting rod two 7 provides a rotating support point for it. The sliding column one 8 and the sliding column two 10 in the sliding groove of the transmission connecting rod two 7 drive the reciprocating push rod one 9 and the reciprocating push rod two 11 to move linearly along the inside of the transmission housing 2, and then the multi-tooth cutter 16 is driven to slide reciprocally in the I-shaped sliding groove 14 through the reciprocating sliding block 15, the multi-tooth cutter 16 is in close cooperation with the comb-shaped fixed teeth 17 outside the I-shaped sliding groove 14, the comb-shaped fixed teeth 17 comb the grass stems, and the multi-tooth cutter 16 cuts the grass stems quickly by using the multi-tooth structure;

[0045] At the same time, the bevel gear one 18 outside the driving shaft 3 rotates, drives the bevel gear two 19 meshing with it to rotate, the bevel gear two 19 drives the transmission shaft 20 to rotate, the bevel gear three 22 on the transmission shaft 20 drives the bevel gear four 23 meshing with it to rotate, the bevel gear four 23 drives the cutting shaft 24 to rotate, the arc-shaped cutting knife 26 at the bottom of the cutting shaft 24 rotates at high speed inside the protective cover 27 to cut the grass stems, and the support ring 21 ensures the stability of the transmission shaft 20, and the limiting ring 25 limits the axial position of the cutting shaft 24;

[0046] The upper blade is a straight blade, reciprocates at a relatively slow but stable speed, and cuts the upper layer of grass, the lower blade is a long arc-shaped curved knife, rotates at a high speed, is responsible for quickly hooking and cutting the lower grass stems, and cuts the grass stubble left after the upper blade cuts, ensures that the cutting is smooth, and the two blades are staggered to avoid interference.

[0047] Finally, it should be pointed out that: the above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A header assembly for a forage harvester comprising a header housing (1), characterised in that: The outer side of the cutting platform shell (1) is fixedly connected with a multi-layer blade cutting mechanism, the outer side of the cutting platform shell (1) is fixedly connected with a transmission shell (2), and the inner side of the transmission shell (2) is fixedly connected with a reciprocating cutting mechanism. The reciprocating cutting mechanism comprises a driving shaft (3), the outer side of the driving shaft (3) is fixedly connected with a rotating disc (5), the inner side of the rotating disc (5) is fixedly connected with a driving assembly, the outer side of the rotating disc (5) is rotatably connected with a transmission connecting rod I (6), the outer side of the shaft of the transmission connecting rod I (6) is rotatably connected with a transmission connecting rod II (7), the inner side of the transmission connecting rod II (7) is provided with two symmetrical sliding grooves, one end of the transmission connecting rod II (7) is slidably connected with a sliding column I (8) in the sliding groove, the outer side of the sliding column I (8) is fixedly connected with a reciprocating push rod I (9), the other end of the transmission connecting rod II (7) is slidably connected with a sliding column II (10) in the sliding groove, the outer side of the sliding column II (10) is fixedly connected with a reciprocating push rod II (11), the outer side of the reciprocating push rod II (11) is slidably connected to the inner side of the transmission shell (2), and the outer side of the reciprocating push rod I (9) is slidably connected to the inner side of the transmission shell (2).

2. A header assembly for a forage harvester as claimed in claim 1, wherein: The driving assembly comprises a driving motor (4), the outer side of the driving motor (4) is fixedly connected to the outer side of the cutting platform shell (1), and the driving end of the driving motor (4) is fixedly connected to the outer side of the driving shaft (3).

3. A header assembly for a forage harvester as claimed in claim 1, wherein: The inner side of the transmission connecting rod II (7) is rotatably connected with a fixed shaft (12), and the outer side of the fixed shaft (12) is fixedly connected to the inner side of the transmission shell (2).

4. The header assembly of claim 1, wherein: The outer side of the transmission shell (2) is fixedly connected with a slotted fixed block (13), the upper and lower sides of the slotted fixed block (13) are provided with I-shaped sliding grooves (14), the inner side of the I-shaped sliding groove (14) is slidably connected with a reciprocating sliding block (15), the outer side of the reciprocating sliding block (15) is fixedly connected to the outer side of the reciprocating push rod I (9), and the outer side of the reciprocating sliding block (15) is fixedly connected to the outer side of the reciprocating push rod II (11).

5. A header assembly for a forage harvester as claimed in claim 4, wherein: The outer side of the I-shaped sliding groove (14) is fixedly connected with a comb-shaped fixed tooth (17), the outer side of the reciprocating sliding block (15) is slidably connected to the outer side of the comb-shaped fixed tooth (17), the outer side of the reciprocating sliding block (15) is fixedly connected with a row of multi-tooth cutting knives (16), and the outer side of the multi-tooth cutting knife (16) is slidably connected to the inner side of the comb-shaped fixed tooth (17).

6. A header assembly for a forage harvester as claimed in claim 1, wherein: The multi-layer blade cutting mechanism comprises a bevel gear I (18), the inner side of the bevel gear I (18) is fixedly connected to the outer side of the driving shaft (3), the inner side of the cutting platform shell (1) is rotatably connected with a transmission shaft (20), one end of the transmission shaft (20) is fixedly connected with a bevel gear II (19), and the outer side of the bevel gear II (19) is meshedly connected to the outer side of the bevel gear I (18).

7. A header assembly for a forage harvester as claimed in claim 6, wherein: The inner side of the cutting platform shell (1) is fixedly connected with a supporting ring (21), the inner side of the supporting ring (21) is rotatably connected to the outer side of the transmission rotating shaft (20), the outer side of the transmission rotating shaft (20) is fixedly connected with a bevel gear three (22), the inner side of the cutting platform shell (1) is rotatably connected with a cutting rotating shaft (24), one end of the cutting rotating shaft (24) is fixedly connected with a bevel gear four (23), the outer side of the bevel gear four (23) is meshedly connected to the outer side of the bevel gear three (22).

8. A header assembly for a forage harvester as claimed in claim 7, characterized in that: The bottom of the cutting platform shell (1) is fixedly connected with a limiting ring (25), the bottom of the limiting ring (25) is fixedly connected with a protective cover (27), the inner side of the limiting ring (25) is rotatably connected to the outer side of the cutting rotating shaft (24), the bottom of the cutting rotating shaft (24) is fixedly connected with an arc-shaped cutting knife (26), and the arc-shaped cutting knife (26) is rotatably connected to the inner side of the protective cover (27).

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