A front-mounted stem cutting device

Abstract

The invention relates to the technical field of agricultural cutting machinery, and discloses a front-mounted stem cutting device, comprising a mounting plate, the front bottom of the mounting plate is movably connected to a frame, and the frame is lifted and lowered by driving a hydraulic cylinder on the mounting plate; a hydraulic motor and a gear box assembly are installed at the rear of the frame, a chain cutting assembly is installed at the front lower end of the frame, the chain cutting assembly comprises two groups of chain saws symmetrically arranged, and the front of the frame is also provided with an auxiliary laying assembly and a tensioning assembly for tensioning the chain saw; the two independent chain saws of the invention also drive the laying mechanism to rotate and push the stems backwards, and with the forward movement of the device, the cutting and laying operations of two rows of upright stems can be realized at one time; the cut stems fall to the furrows on both sides and are then crushed by the front and rear wheel groups of the tractor, greatly reducing the adverse effects on subsequent tuber (stem) digging operations.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural cutting machinery, in particular to a front-mounted stalk cutting device. Background Art

[0002] Root crops with upright stems, such as cassava, taro and potato, have stems as one of the by-products of root crops. The stems are not only large in quantity but also have many adverse effects on the subsequent harvesting of tubers (stems). Therefore, before harvesting, the stems need to be manually removed or crushed and returned to the field. At present, the main methods of handling stems are manual cutting and removal from the field or using a straw return machine to crush the stems and return them to the field. The manual cutting and removal method is not only labor-intensive and inefficient, but also greatly increases the harvesting cost of root crops; the crushing and returning method requires an additional tractor operation process, which not only increases the operating cost and the number of times the field is rolled, but also causes the tractor to be unable to effectively drive in the subsequent harvesting operation and increases the amount of material separation during the root (stem) soil separation. To this end, we introduce a front-mounted stem cutting device and its operation method. Summary of the invention

[0003] The object of the present invention is to provide a front-mounted stem cutting device to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A front-mounted stem cutting device comprises a mounting plate, the front bottom of which is movably connected to a frame, and the frame is lifted and lowered by a hydraulic cylinder on the mounting plate;

[0006] A hydraulic motor and a gear box assembly are installed at the rear of the frame, a chain cutting assembly is installed at the front lower end of the frame, the chain cutting assembly includes two groups of chain saws arranged symmetrically, and an auxiliary laying assembly and a tensioning assembly for tensioning the chain saw are also provided at the front of the frame;

[0007] The laying mechanism at the top of the auxiliary laying assembly extends out through the corresponding slot on the pressing plate;

[0008] A front hood is fixed at the front end of the frame, and pressure plates are symmetrically arranged on the left and right sides of the front hood at the front of the frame, and a depth limiting wheel assembly that can be adjusted up and down is installed at the lower end of the front of the frame;

[0009] The hydraulic motor drives two groups of chain saws to rotate through the gear box assembly. The chain saws rotate to cut the stems. At the same time, the chain saws also drive the laying mechanism to rotate to push the stems backwards, and then cooperate with the pressure plates on the left and right sides to lay the cut stems backwards.

[0010] Preferably, the mounting plate includes an upper hanging plate, a handle, a lower hanging plate, an intermediate fixing seat, a lower plate, a front plate, a side plate, an upper plate and a semicircular steel bar;

[0011] The upper plate and the lower plate are welded to the upper and lower end surfaces of the front plate respectively, and the four side plates are welded to the upper and lower parts of the left and right end surfaces of the front plate in a symmetrical manner, and the corresponding side plates are welded and fixed to the lower surface of the upper plate and the upper surface of the lower plate respectively;

[0012] Two upper suspension plates are welded to the upper surface of the upper plate and the upper end of the front surface of the front plate, and two lower suspension plates are welded to the lower surface of the lower plate and the lower end of the front surface of the front plate;

[0013] The middle fixing seat and the semicircular steel bar are welded to the middle of the rear surface of the front plate and the middle of the lower surface of the upper plate respectively;

[0014] The two handles at the left and right ends are respectively welded to the outer surfaces of the two side panels on both sides;

[0015] The upper plate and the lower plate are symmetrical structures.

[0016] Preferably, the rear end of the hydraulic cylinder is movably connected between the two upper suspension plates by a pin shaft.

[0017] Preferably, the frame includes a lower suspension round tube, an upper front crossbeam, a bottom side longitudinal beam, a bottom middle longitudinal beam, a bottom front longitudinal beam, a tensioning base, a depth limiting wheel mounting seat, a pressure plate front fixing seat, a tensioning fixing seat, a reinforcing plate, a side belt seat bearing mounting seat, a bottom front crossbeam, a hydraulic motor seat, an upper rear crossbeam, an upper middle longitudinal beam and a bottom rear crossbeam;

[0018] The lower suspension round tube is a cylindrical round tube structure, and the lower suspension round tube is hinged between the two lower suspension plates through a pin shaft, and the front parts of both ends of the lower suspension round tube are connected to the upper rear cross beam and the rear end of the bottom rear cross beam through supporting round tubes;

[0019] A hydraulic cylinder lower suspension seat is welded to the middle part of the upper surface of the upper front cross beam and the upper rear cross beam, and a piston rod at the output end of the hydraulic cylinder is movably connected to the hydraulic cylinder lower suspension seat through a pin shaft;

[0020] The two upper middle longitudinal beams are respectively welded to the rear surface of the upper front cross beam, the front surface of the upper rear cross beam and the bottom surface of the lower suspension seat of the hydraulic cylinder;

[0021] The hydraulic motor seat is welded to the front surface of the upper front cross beam, and the hydraulic motor is fixed to the upper end of the hydraulic motor seat;

[0022] The two bottom longitudinal beams are respectively located at the outside of the bottom of the frame, and two through holes for fixing the inner wall of the side of the pressing plate are opened on the side of the front end of the bottom longitudinal beam;

[0023] The gearbox assembly is fixed on the two bottom middle longitudinal beams, the front and rear end surfaces of the two bottom middle longitudinal beams are welded to the bottom front cross beam and the bottom rear cross beam respectively, and the middle parts of the sides of the two bottom middle longitudinal beams are also welded and fixed to the corresponding bottom side longitudinal beams through cross beams;

[0024] The bottom surfaces of the two side belt seat bearing mounting seats are respectively welded to the upper surfaces of the bottom side longitudinal beam and the bottom front cross beam;

[0025] The two ends of the bottom front longitudinal beam are respectively welded to the front surface of the bottom front cross beam, the reinforcement plate and the rear surface of the depth-limiting wheel mounting seat, and the upper surface and the lower surface of the bottom front longitudinal beam are respectively welded with a tensioning fixing seat and a tensioning base;

[0026] The front fixing seat of the pressing plate is welded at the upper positions of the two side surfaces of the depth limiting wheel mounting seat, and the inner wall of the front end of the pressing plate is fixed on the front fixing seat of the pressing plate.

[0027] Preferably, the gear box assembly includes a shaft sleeve, an upper cover, a bottom bin, a grease nipple, a main shaft, a driving gear, a driven shaft, a sealing paper gasket and a driven gear;

[0028] The bottom bin is fixed on two bottom middle longitudinal beams, and the sealing paper pad is arranged between the upper cover and the bottom bin;

[0029] The top of the main shaft extends out of the upper cover and is connected to the output shaft of the hydraulic motor through a shaft sleeve. The bottom of the main shaft extends out of the bottom bin and is connected to the first main gear. The driving gear is fixed in the middle of the main shaft.

[0030] The bottom of the driven shaft extends out of the bottom bin and is connected to the second main gear, and the driven gear is fixed on the upper part of the driven shaft;

[0031] The driving gear meshes with the driven gear;

[0032] The upper cover and the bottom bin are both provided with single-sided deep groove ball bearings with sealing rings, and the single-sided deep groove ball bearings with sealing rings are sleeved on the main shaft and the driven shaft respectively;

[0033] The interior of the bottom bin is also provided with a rubber sealing ring sleeved on the driven shaft of the main shaft;

[0034] The grease nipple is arranged on the top of the upper cover.

[0035] Preferably, the chain cutting assembly further comprises a side belt seat bearing fixed on the side belt seat bearing mounting seat, and the bottom of the side driven shaft in the side belt seat bearing is connected to a driven side gear;

[0036] The tensioning assembly includes a seat bearing fixed symmetrically to the upper end of the tensioning base plate, a tensioning gear connected to the bottom of the tensioning driven shaft in the seat bearing after passing through the tensioning base plate, and a tensioning bolt connected between the tensioning fixed seat and the vertical plate at the rear end of the tensioning base plate. The tensioning adjustment fastener on the tensioning base plate passes through the waist-round hole on the bottom front longitudinal beam and the tensioning base to lock and fix the tensioning base plate.

[0037] The auxiliary placement assembly includes a mounting seat fixed to the upper end of the bottom front longitudinal beam, a vertical shaft connected to both sides of the mounting seat, a bottom driving gear connected to the rear of the vertical shaft passing through the mounting seat, and a top plate connected to the vertical plate in the middle of the upper end of the mounting seat;

[0038] The chain saw on the left is connected between the first main gear, the driven side gear on the left, the tensioning gear on the left and the bottom driving gear on the left, and the chain saw on the right is connected between the second main gear, the driven side gear on the right, the tensioning gear on the right and the bottom driving gear on the right.

[0039] Preferably, cutting blades are arranged at equal intervals on the outer side of the chain saw. To avoid collision between the cutting blades on the two chain saws, the two chain saws are installed in opposite ways.

[0040] Preferably, the laying mechanism comprises a rotating drum symmetrically arranged on both sides of the top plate, an outer gear ring fixed on the outer side of the lower end of the rotating drum, a bent top seat fixed on the upper end of the rotating drum, and a laying conveyor belt arranged below the bent top seat;

[0041] The upper end of the vertical shaft extends through the top bearing inside the drum and is connected to a driving pulley, and the driving pulley is connected to the inside of the inner end of the laying conveyor belt;

[0042] The bottom of the outer end of the bent top seat is movably connected with a driven pulley, and the outer end of the laying conveyor belt extends through the notch on the side of the upper end of the rotating drum and is sleeved on the driven pulley;

[0043] A guide pulley is movably connected to the bottom of the bending part of the bending top seat, and the guide pulley is located inside the laying conveyor belt to guide the laying conveyor belt;

[0044] Guide side plates are provided on both sides of the lower end of the bending part of the bending top seat, and two sets of guide side plates are located on both sides of the laying conveyor belt;

[0045] The outer surface of the laying conveyor belt is provided with toggle plates at equal intervals;

[0046] A tension spring is also connected between the front parts of the two sets of bent top seats, and the inner sides of the two sets of outer tooth rings extend into the rectangular through grooves on the upper part of the vertical plate and mesh with each other;

[0047] The depth limiting wheel assembly comprises a universal wheel and a wheel seat fixed on the top of the universal wheel, the wheel seat extends into the depth limiting wheel mounting seat, and the fixing bolts on the depth limiting wheel mounting seat are screwed into corresponding screw holes on the wheel seat.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts two independent chain cutting assemblies and a pressing plate as the main actuator, and the chain saw of the chain cutting assembly also drives the laying mechanism to rotate and push the stem backward. With the forward movement of the device, the cutting and laying operation of two rows of upright stems can be realized at one time; when the forward speed of the unit is too slow, or the cut stems are blocked and cannot be smoothly moved and dumped toward the rear of the pressing plate, the laying conveyor belt is also consistent with the rotation direction of the corresponding chain saw, so that under the action of the pushing plate on the outer surface of the laying conveyor belt to push the stems, it can be ensured that the cut stems can smoothly move and dump toward the rear of the pressing plate; the cut stems fall to the furrows on both sides under the action of the left and right pressing plates and the laying mechanism, and then are crushed by the front and rear wheel groups of the tractor, which greatly reduces the adverse effects on the subsequent root (stem) excavation operation. The present invention can realize the removal of two rows of upright stems in one operation, while improving the operation efficiency and quality, and greatly reducing the operation cost of harvesting root crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention as a whole;

[0050] Figure 2 This is a schematic diagram of the three-dimensional structure of the pressure plate of the present invention after being disassembled;

[0051] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting plate of the present invention;

[0052] Figure 4 It is a three-dimensional structural schematic diagram of the frame of the present invention;

[0053] Figure 5 It is a three-dimensional structural schematic diagram of the gearbox assembly of the present invention;

[0054] Figure 6 It is a schematic cross-sectional view of the gearbox assembly of the present invention;

[0055] Figure 7 It is a structural schematic diagram of the main shaft of the present invention;

[0056] Figure 8 It is a structural schematic diagram of the driven shaft of the present invention;

[0057] Fig. 9 It is a schematic diagram of a three-dimensional structure of the gear box assembly, the chain cutting assembly, the tensioning assembly and the auxiliary laying assembly of the present invention;

[0058] Fig.10 It is a schematic diagram of the top view of the structure of two sets of chain saw drives of the present invention;

[0059] Fig.11It is a schematic diagram of a three-dimensional structure of the tension fixing seat, the bottom front longitudinal beam, the tension base and the depth limiting wheel mounting seat of the present invention;

[0060] Fig.12 It is a schematic diagram of a three-dimensional structure of the connection between the tensioning assembly, the depth limiting wheel assembly, the bottom front longitudinal beam and the depth limiting wheel mounting seat of the present invention;

[0061] Fig.13 It is a schematic diagram of the three-dimensional structure of the auxiliary laying assembly after the laying conveyor belt of the present invention is disassembled;

[0062] Fig.14 It is a schematic diagram of the overall three-dimensional structure of the auxiliary placement assembly of the present invention;

[0063] Fig.15 It is a schematic diagram of the three-dimensional structure of the pressing plate of the present invention;

[0064] Fig.16 It is a second stereoscopic structural schematic diagram of the present invention as a whole.

[0065] In the figure: 1. mounting plate; 101. upper hanging plate; 102. handle; 103. lower hanging plate; 104. middle fixing seat; 105. lower plate; 106. front plate; 107. side plate; 108. upper plate; 109. semicircular steel bar; 2. frame; 201. lower hanging round tube; 202. supporting round tube; 203. upper front cross beam; 204. bottom side longitudinal beam; 205. bottom middle longitudinal beam; 206. bottom front longitudinal beam; 2061. waist round hole; 207. tensioning base; 208. depth limit wheel mounting seat; 209. front fixing seat of pressure plate; 210. tensioning fixing seat; 211. 1. Reinforcement plate; 212. Side belt seat bearing mounting seat; 213. Bottom front crossbeam; 214. Hydraulic motor seat; 215. Upper rear crossbeam; 216. Hydraulic cylinder lower suspension seat; 217. Upper middle longitudinal beam; 218. Bottom rear crossbeam; 3. Hydraulic cylinder; 301. Piston rod; 4. Hydraulic motor; 5. Gearbox assembly; 501. Bushing; 502. Upper cover; 503. Bottom bin; 504. First main gear; 505. Second main gear; 506. Grease fitting; 507. Main shaft; 508. Single-sided deep groove ball bearing with sealing ring; 509. Driving gear; 510. Rubber Rubber seal ring; 511, driven shaft; 512, sealing paper pad; 513, driven gear; 6, chain cutting assembly; 601, chain saw; 602, driven side gear; 603, side driven shaft; 604, cutting blade; 605, side belt seat bearing; 7, tensioning assembly; 701, belt seat bearing; 702, tensioning bottom plate; 703, tightening bolt; 704, tensioning driven shaft; 705, tensioning gear; 706, vertical plate; 707, tensioning adjustment fastener; 8, pressure plate; 801, slotting; 9, depth limiting wheel assembly; 901, wheel seat; 902, universal wheel; 90 3. Fixing bolt; 904. Screw hole; 10. Front hood; 11. Auxiliary laying assembly; 1101. Bottom driving gear; 1102. Mounting seat; 1103. Vertical plate; 1104. Vertical axis; 1105. Bending top seat; 1106. Tension spring; 1107. Laying conveyor belt; 1108. External gear ring; 1109. Toggle plate; 1110. Top plate; 1111. Guide side plate; 1112. Driven pulley; 1113. Guide pulley; 1114. Rectangular through groove; 1115. Rotating drum; 1116. Driving pulley; 1117. Top bearing. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] Example:

[0068] See also Figure 1-16 , the present invention provides a technical solution:

[0069] A front-mounted stalk cutting device includes a mounting plate 1, which is mainly welded from metal materials such as steel plates and round steel, and has a bilaterally symmetrical structure. The front-mounted stalk cutting device is installed at the front counterweight installation position of the tractor through the mounting plate 1. Before installation, the front counterweight of the tractor needs to be removed, and the long bolt (central through hole) and four short bolts used for installing and fixing the front counterweight are used to complete the connection and fixation between the mounting plate 1 and the tractor.

[0070] The mounting plate 1 includes an upper hanging plate 101, a handle 102, a lower hanging plate 103, an intermediate fixing seat 104, a lower plate 105, a front plate 106, a side plate 107, an upper plate 108 and a semicircular steel bar 109;

[0071] The upper plate 108 and the lower plate 105 are welded to the upper and lower end surfaces of the front plate 106 respectively, and the four side plates 107 are welded to the upper and lower parts of the left and right end surfaces of the front plate 106 in a symmetrical manner, and the corresponding side plates 107 are welded and fixed to the lower surface of the upper plate 108 and the upper surface of the lower plate 105 respectively;

[0072] Two upper suspension plates 101 are welded to the upper surface of the upper plate 108 and the upper end of the front surface of the front plate 106, and two lower suspension plates 103 are welded to the lower surface of the lower plate 105 and the lower end of the front surface of the front plate 106. The two upper suspension plates 101 and the two lower suspension plates 103 are mainly used for the movable connection between the hydraulic cylinder 3 and the frame 2;

[0073] The rear end of the hydraulic cylinder 3 is movably connected between the two upper suspension plates 101 by a pin shaft, and the lower suspension round tube 201 at the rear end of the frame 2 is hinged to the two lower suspension plates 103 by a pin shaft.

[0074] The middle fixing seat 104 and the semicircular steel bar 109 are respectively welded to the middle of the rear surface of the front plate 106 and the middle of the lower surface of the upper plate 108, and are mainly used to connect and buckle with the tractor counterweight mounting seat;

[0075] The two handles 102 at the left and right ends are respectively welded to the outer surfaces of the two side plates 107 on both sides. Each side plate 107 is provided with a welding hole for the handle 102, which is mainly used to facilitate the installation and removal of the entire mounting plate 1 and the front end of the tractor;

[0076] The upper plate 108 and the lower plate 105 are symmetrical structures. Threaded through holes are provided on both sides of the upper plate 108, and a long bolt mounting through hole for mounting and fixing the front counterweight is provided in the middle. This long bolt mounting through hole is coaxial with the through hole provided in the middle fixing seat 104 and has the same diameter. The four threaded through holes and the three long bolt mounting through holes are mainly used for connecting and fixing between the mounting plate 1 and the front end of the tractor.

[0077] The front bottom of the mounting plate 1 is movably connected to the frame 2;

[0078] The frame 2 is mainly welded by metal materials such as square steel pipes, round steel pipes and steel plates. Except that the welding position of the hydraulic motor seat 214 is biased to the right, the rest of the parts are bilaterally symmetrical structures, and the connection method between each component is welding.

[0079] The frame 2 includes a lower suspension round tube 201, an upper front crossbeam 203, a bottom side longitudinal beam 204, a bottom middle longitudinal beam 205, a bottom front longitudinal beam 206, a tensioning base 207, a depth limiting wheel mounting seat 208, a pressure plate front fixing seat 209, a tensioning fixing seat 210, a reinforcing plate 211, a side belt seat bearing mounting seat 212, a bottom front crossbeam 213, a hydraulic motor seat 214, an upper rear crossbeam 215, an upper middle longitudinal beam 217 and a bottom rear crossbeam 218;

[0080] The lower suspension tube 201 is a cylindrical tube structure, and the front parts of both ends of the lower suspension tube 201 are connected to the rear ends of the upper rear cross beam 215 and the bottom rear cross beam 218 through the supporting tubes 202;

[0081] A hydraulic cylinder lower suspension seat 216 is welded to the middle portion of the upper surface of the upper front cross beam 203 and the upper rear cross beam 215;

[0082] The two upper middle longitudinal beams 217 are respectively welded to the rear surface of the upper front cross beam 203, the front surface of the upper rear cross beam 215 and the bottom surface of the hydraulic cylinder lower suspension seat 216;

[0083] The hydraulic motor seat 214 is welded to the front surface of the upper front cross beam 203, and the welding position is biased to the right. The middle through hole on the hydraulic motor seat 214 is coaxial with the main shaft 507 of the gear box assembly 5, and is mainly used for connecting and fixing the hydraulic motor 4 to the frame 2, that is, the hydraulic motor 4 is fixed to the upper end of the hydraulic motor seat 214 of the frame 2;

[0084] The two bottom longitudinal beams 204 are respectively located at the bottom outer side of the frame 2, and two through holes for fixing the inner wall of the side of the pressure plate 8 are opened on the front side of the bottom longitudinal beam 204. The upper surface of the front end of the bottom longitudinal beam 204 is opened with a through hole corresponding to the side belt seat bearing mounting seat 212, which is mainly used for the installation and fixation between the pressure plate 8, the side belt seat bearing 605 and the frame 2;

[0085] The gearbox assembly 5 is fixed on the two bottom middle longitudinal beams 205. The middle parts of the two bottom middle longitudinal beams 205 are provided with two mounting through holes for fixing the gearbox assembly 5. The front and rear end surfaces of the two bottom middle longitudinal beams 205 are respectively welded to the bottom front cross beam 213 and the bottom rear cross beam 218. The middle parts of the sides of the two bottom middle longitudinal beams 205 are also welded and fixed to the corresponding bottom side longitudinal beams 204 through cross beams. The provision of the cross beams increases the bearing capacity of the two bottom middle longitudinal beams 205 on the gearbox assembly 5.

[0086] The bottom surfaces of the two side belt seat bearing mounting seats 212 are respectively welded to the upper surfaces of the bottom side longitudinal beam 204 and the bottom front cross beam 213; a through hole corresponding to the side belt seat bearing mounting seat 212 is opened on both sides of the upper surface of the bottom front cross beam 213, which is mainly used for the installation and fixation between the side belt seat bearing 605 and the frame 2;

[0087] The two ends of the bottom front longitudinal beam 206 are respectively welded to the front surface of the bottom front cross beam 213, the reinforcing plate 211 and the rear surface of the depth-limiting wheel mounting seat 208, and the upper surface and the lower surface of the bottom front longitudinal beam 206 are respectively welded with a tensioning fixing seat 210 and a tensioning base 207;

[0088] The front fixing seat 209 of the pressing plate is welded to the upper position of both sides of the depth limiting wheel mounting seat 208 , and is mainly used for installation and fixation between the front end of the pressing plate 8 and the frame 2 , and the inner wall of the front end of the pressing plate 8 is fixed on the front fixing seat 209 of the pressing plate.

[0089] The lifting and lowering of the frame 2 is achieved by driving the hydraulic cylinder 3 on the mounting plate 1;

[0090] The piston rod 301 at the output end of the hydraulic cylinder 3 is movably connected to the lower suspension seat 216 of the hydraulic cylinder through a pin;

[0091] When in use, the hydraulic cylinder 3 needs to be connected to the hydraulic control valve of the tractor hydraulic output device through the hydraulic oil pipe, wherein the tractor hydraulic output device and the hydraulic control valve are both prior art and have a wide range of applications, and the specific models are not described in detail;

[0092] The model of hydraulic cylinder 3 is the lifting cylinder of Dongfanghong LX904 tractor, the lifting cylinder of hydraulic suspension accessories of Lovol Oubao tractor, the hydraulic middle tie rod cylinder of 904-2404 suspension of high-horsepower tractor or other models that meet the use requirements;

[0093] The hydraulic cylinder 3 retracts and extends the piston rod 301 at its output end, so that the frame 2 rotates around the pin shaft in the hanging circular tube 201 below, thereby achieving the lifting and lowering of the frame 2.

[0094] A hydraulic motor 4 and a gear box assembly 5 are installed at the rear of the frame 2;

[0095] When in use, the hydraulic motor 4 needs to be connected to the hydraulic control valve of the tractor hydraulic output device through the hydraulic oil pipe, wherein the tractor hydraulic output device and the hydraulic control valve are both prior art and have a wide range of applications, and the specific models are not described in detail;

[0096] The model of the hydraulic motor 4 is NHM series radial piston hydraulic motor: such as NHM6-600, NHM6-700, NHM6-750, etc. or JGM series radial piston hydraulic motor: such as JGM3-1000, JGM4-1100, etc. or Eaton type hydraulic motor: such as BM6K-195 / 245 / 310 / 390 / 490 / 630 / 800 / 985, etc. or other models that meet the use requirements;

[0097] The gear box assembly 5 includes a sleeve 501, an upper cover 502, a bottom bin 503, a grease nipple 506, a main shaft 507, a driving gear 509, a driven shaft 511, a sealing paper pad 512 and a driven gear 513;

[0098] The bottom bin 503 is fixed on two bottom middle longitudinal beams 205, and the sealing paper pad 512 is arranged between the upper cover 502 and the bottom bin 503;

[0099] The inner holes at both ends of the sleeve 501 are provided with keyways and set screw holes, which are mainly used for connecting and fixing the output shaft of the hydraulic motor 4 and the main shaft 507; the top of the main shaft 507 extends out of the upper cover 502 and is connected to the output shaft of the hydraulic motor 4 through the sleeve 501, and the bottom of the main shaft 507 extends out of the bottom bin 503 and is connected to the first main gear 504, and the driving gear 509 is fixed in the middle of the main shaft 507;

[0100] The bottom of the driven shaft 511 extends out of the bottom bin 503 and is connected to the second main gear 505 . The driven gear 513 is fixed to the upper part of the driven shaft 511 .

[0101] The driving gear 509 meshes with the driven gear 513;

[0102] The outer side of the upper cover 502 is symmetrically provided with four bolt through holes for installation and fixation with the sealing paper pad 512 and the bottom bin 503. The middle part of the upper cover 502 is provided with two bearing mounting stepped holes for mounting the single-sided deep groove ball bearing 508 with a sealing ring. The left side is a through hole for mounting the rubber sealing ring 510 and for the upper end of the main shaft 507 to extend. The middle part is provided with a grease nipple mounting threaded through hole for mounting and fixing the grease nipple 506 and injecting grease.

[0103] The bottom bin 503 is a bilaterally symmetrical structure, with four bolt through holes symmetrically arranged on the outer side for installation and fixation with the sealing paper pad 512 and the upper cover 502. Two stepped through holes are arranged inside the middle part of the bottom bin 503, which are mainly used for installation and fixation of the single-sided deep groove ball bearing 508 with a sealing ring, the rubber sealing ring 510, and the extension of the lower ends of the main shaft 507 and the driven shaft 511.

[0104] The upper cover 502 and the bottom bin 503 are both provided with a single-sided deep groove ball bearing 508 with a sealing ring, and the single-sided deep groove ball bearing 508 with a sealing ring is sleeved on the main shaft 507 and the driven shaft 511 respectively;

[0105] The bottom bin 503 is also provided with a rubber sealing ring 510 sleeved on the driven shaft 511 of the main shaft 507;

[0106] The grease fitting 506 is disposed on the top of the upper cover 502;

[0107] like Figure 7 As shown, the upper and lower ends (A and C) of the main shaft 507 are provided with flat key slots, and the lower end surface (D) is provided with a threaded hole, which is used to connect and fix with the shaft sleeve 501 and the first main gear 504 respectively, and the flat key slot in the middle part (B) of the main shaft 507 is used for installation and fixation between the driving gear 509 and the main shaft 507;

[0108] like Figure 8 As shown, the upper and lower ends (at B1 and C1) of the driven shaft 511 are provided with flat key slots, and the lower end surface (at D1) is provided with a threaded hole, which is used for connection and fixation with the driven gear 513 and the second main gear 505 respectively;

[0109] After the components of the gearbox assembly 5 are assembled, a relatively closed cavity can be formed between the upper cover 502, the sealing paper pad 512 and the bottom bin 503. The single-sided deep groove ball bearing 508 with a sealing ring and the rubber sealing ring 510 further block the entry of external dust and the leakage of butter in the cavity, and can provide a closed and well-lubricated working environment for the gear transmission (i.e., the transmission of the driving gear 509 and the driven gear 513), greatly improving the service life of this assembly;

[0110] The four sets of threaded fasteners around the upper cover 502 , the sealing paper pad 512 and the bottom bin 503 not only complete the fastening between the three components, but also carry the installation and fixing function between the gear box assembly 5 and the frame 2 .

[0111] A chain cutting assembly 6 is installed at the front lower end of the frame 2, and the chain cutting assembly 6 includes two groups of chain saws 601 that are symmetrically arranged;

[0112] The chain cutting assembly 6 also includes a side belt seat bearing 605 fixed on the side belt seat bearing mounting seat 212, and the bottom of the side driven shaft 603 in the side belt seat bearing 605 is connected to a driven side gear 602;

[0113] Cutting blades 604 are evenly spaced on the outer side of the chain saw 601. To avoid collision between the cutting blades 604 on both sides of the chain saws 601, the installation methods of the chain saws 601 on both sides are opposite, that is, the cutting blade 604 on the left chain saw 601 is located at the outer top of the left chain saw 601, and the cutting blade 604 on the right chain saw 601 is located at the outer bottom of the right chain saw 601.

[0114] The driven side gear 602, the tensioning gear 705, the first main gear 504 and the second main gear 505 have the same structure, which can greatly improve the versatility of the parts of the device;

[0115] like Fig.10 As shown, by adjusting the size of the included angle α between the two chain saws 601, crop stem cutting with different planting row spacings (i.e., large ridge double-row planting, single-row ridge planting, or flat planting) can be achieved.

[0116] The front part of the frame 2 is also provided with an auxiliary laying assembly 11 and a tensioning assembly 7 for tensioning the chain saw 601;

[0117] The auxiliary placement assembly 11 includes a mounting seat 1102 fixed to the upper end of the bottom front longitudinal beam 206, a vertical shaft 1104 connected to both sides of the mounting seat 1102, a bottom driving gear 1101 connected to the bottom of the vertical shaft 1104 passing through the mounting seat 1102, and a top plate 1110 connected to the vertical plate 1103 in the middle of the upper end of the mounting seat 1102;

[0118] The tensioning assembly 7 includes a seat bearing 701 symmetrically fixed to the upper end of the tensioning base plate 702, a tensioning driven shaft 704 in the seat bearing 701, the bottom of which passes through the tensioning base plate 702 and is connected to the tensioning gear 705, and a tensioning bolt 703 connected between the tensioning fixed seat 210 and the vertical plate 706 at the rear end of the tensioning base plate 702. The tensioning adjusting fastener 707 on the tensioning base plate 702 passes through the waist-round hole 2061 on the bottom front longitudinal beam 206 and the tensioning base 207 to lock and fix the tensioning base plate 702.

[0119] Two tensioning adjustment bolt through holes for penetrating the tensioning adjustment fasteners 707 are provided in the middle of the tensioning base plate 702, and fixing holes for installing the seat bearing 701 and extension holes for the tensioning driven shaft 704 are symmetrically provided on the left and right sides of the tensioning base plate 702;

[0120] A groove is formed on the rear surface of the vertical plate 706 corresponding to the protruding end (front end) of the tightening bolt 703 to further ensure a reliable tensioning effect.

[0121] When the tensioning assembly 7 is being tensioned, it is necessary to first slightly loosen the tensioning adjustment fastener 707, and then adjust the tensioning bolt 703 so that the tensioning bolt 703 presses against the vertical plate 706 at the rear end of the tensioning base plate 702. After the position is suitable, tighten the nut in front of the tensioning fixing seat 210, and then retighten the two sets of loosened tensioning adjustment fasteners 707, thus completing the tensioning adjustment of the left and right chain saws 601.

[0122] The chain saw 601 on the left is connected between the first main gear 504, the driven side gear 602 on the left, the tensioning gear 705 on the left and the bottom driving gear 1101 on the left, and the chain saw 601 on the right is connected between the second main gear 505, the driven side gear 602 on the right, the tensioning gear 705 on the right and the bottom driving gear 1101 on the right.

[0123] The laying mechanism on the top of the auxiliary laying assembly 11 extends out through the corresponding slot 801 on the pressing plate 8;

[0124] The laying mechanism includes a rotating drum 1115 symmetrically arranged on both sides of the top plate 1110, an outer gear ring 1108 fixed on the outer side of the lower end of the rotating drum 1115, a bending top seat 1105 fixed on the upper end of the rotating drum 1115, and a laying conveyor belt 1107 arranged below the bending top seat 1105;

[0125] The upper end of the vertical shaft 1104 extends through the top bearing 1117 inside the rotating drum 1115 and is connected to a driving pulley 1116, and the driving pulley 1116 is connected to the inside of the inner end of the laying conveyor belt 1107;

[0126] The bottom of the outer end of the bending top seat 1105 is movably connected to a driven pulley 1112, and the outer end of the laying conveyor belt 1107 extends through the notch on the side of the upper end of the rotating drum 1115 and is sleeved on the driven pulley 1112;

[0127] A guide pulley 1113 is movably connected to the bottom of the bending part of the bending top seat 1105. The guide pulley 1113 is located inside the laying conveyor belt 1107 and is used to guide the laying conveyor belt 1107.

[0128] Both sides of the lower end of the bending part of the bending top seat 1105 are provided with guide side plates 1111, and two sets of guide side plates 1111 are located on both sides of the laying conveyor belt 1107;

[0129] The outer surface of the laying conveyor belt 1107 is provided with toggle plates 1109 at equal intervals;

[0130] A tension spring 1106 is also connected between the front parts of the two sets of bent top seats 1105, and the inner sides of the two sets of outer tooth rings 1108 extend into the rectangular through slots 1114 on the upper part of the vertical plate 1103 and mesh with each other;

[0131] Under the tension of the tension spring 1106, the front parts of the two groups of bending top seats 1105 have a pulling force that approaches each other. At this time, the bending top seat 1105 will drive the rotating drum 1115 at the bottom of its inner end to rotate. Since the outer tooth ring 1108 at the lower end of the rotating drum 1115 is meshed with each other, the tension of the tension spring 1106 can make the two groups of bending top seats 1105 rotate synchronously, so that the front parts of the two groups of bending top seats 1105 extend out of the slot 801 until the front parts of the bending top seats 1105 abut against the inner end of the slot 801, thereby realizing that the corresponding toggle plate 1109 on the laying conveyor belt 1107 extends out of the slot 801. Under the rotation of the laying conveyor belt 1107, the toggle plate 1109 pushes the cut stems backwards, which can ensure that the cut stems can smoothly move toward the rear of the pressure plate 8 and dump.

[0132] The front end of the frame 2 is fixed with a front hood 10, which is made of a stainless steel sheet through sheet metal processing. Two bolt through holes are respectively provided on both sides of the upper end thereof for connection and fixation between the left and right pressure plates 8. Both sides of the upper and lower ends thereof are chamfered to avoid cuts to the operator during the installation process. Its main function is to prevent field weeds from being entangled on the depth limiting wheel assembly during the operation of the device.

[0133] The front part of the frame 2 is symmetrically provided with pressure plates 8 located on the left and right sides of the front hood 10. The pressure plate 8 on the left and the pressure plate 8 on the right are symmetrical structures and are both made of stainless steel sheets through sheet metal processing.

[0134] by Fig.15 Taking the left side pressing plate 8 as an example, two pressing plate side fixing through holes corresponding to the bottom longitudinal beam 204 of the frame 2 are opened at the left lower end, which are mainly used for the installation and fixing between the pressing plate 8 and the side of the frame 2;

[0135] The left side pressure plate 8 has two bolt holes at the upper middle part of the front end corresponding to the upper part of the front hood 10, which are mainly used for connecting and fixing the front hood 10 with the left and right pressure plates 8;

[0136] At the lower bend in the middle of the front end of the left pressing plate 8, two mounting through holes corresponding to the pressing plate front fixing seat 209 of the frame 2 are opened, which are mainly used for mounting and fixing the pressing plate 8 and the front end of the frame 2. In order to enhance the fixing strength, a reinforcing rib is provided between the two holes at the bend;

[0137] The middle part of the pressing plate 8 is a vertical structure, the upper end is slightly bent downward, and the lower end is slightly bent upward. The bottom line of the bending part of the middle part of the lower end is parallel to the inner side of the chain saw 601, and the cutting blade 604 on the chain saw 601 extends from the front of the bottom of the pressing plate 8;

[0138] The main function of the pressing plate 8 is that when the cutting blade 604 on the chain saw 601 cuts off the two rows of stems along the bottom respectively, as the unit moves forward, the left and right pressing plates 8 gradually press the cut stems to the furrows on both sides;

[0139] However, when the forward speed of the unit is too slow, or the cut stems are obstructed and cannot be smoothly moved and dumped toward the rear of the pressure plate 8, the laying conveyor belt 1107 is also consistent with the rotation direction of the corresponding chain saw 601 (that is, the laying conveyor belt 1107 on the left is consistent with the rotation direction of the chain saw 601 on the left, and the laying conveyor belt 1107 on the right is consistent with the rotation direction of the chain saw 601 on the right), so that the cutting stems can be smoothly moved and dumped toward the rear of the pressure plate 8 under the action of the toggle plate 1109 on the outer surface of the laying conveyor belt 1107.

[0140] A depth limiting wheel assembly 9 which can be adjusted up and down is installed at the lower front end of the frame 2;

[0141] The depth limiting wheel assembly 9 includes a universal wheel 902 and a wheel seat 901 fixed on the top of the universal wheel 902. The wheel seat 901 extends into the depth limiting wheel mounting seat 208, and the fixing bolts 903 on the depth limiting wheel mounting seat 208 are screwed into the corresponding screw holes 904 on the wheel seat 901. Several groups of screw holes 904 are distributed at equal intervals up and down, and are used to complete the adjustment of the working height of the depth limiting wheel assembly 9 together with the fixing bolts 903 of the depth limiting wheel mounting seat 208.

[0142] The hydraulic motor 4 drives two groups of chain saws 601 to rotate through the gear box assembly 5. The chain saws 601 rotate to cut the stems. At the same time, the chain saws 601 also drive the laying mechanism to rotate to push the stems backwards, and then cooperate with the pressure plates 8 on the left and right sides to achieve the backward laying of the cut stems.

[0143] The present invention also provides an operation method of a front-mounted stem cutting device, which specifically comprises the following steps:

[0144] S1. After the mounting plate 1 is installed, the frame 2 is lowered by driving the hydraulic cylinder 3, and then the position of the depth-limiting wheel assembly 9 is adjusted;

[0145] S2, the frame 2 moves forward, the hydraulic motor 4 drives the two sets of chain saws 601 to rotate through the gear box assembly 5, and the chain saws 601 rotate to cut the stems;

[0146] S3. At the same time, the chain saw 601 also drives the laying mechanism to rotate and push the stems backward, so that the cut stems are laid backward along the pressing plates 8 on the left and right sides.

[0147] Specifically, when in use, remove the front counterweight of the tractor and install the mounting plate 1 of the device to the front counterweight installation position;

[0148] Use hydraulic oil pipes to connect the hydraulic control valve of the tractor's hydraulic output device with the hydraulic cylinder 3 and the hydraulic motor 4;

[0149] After the connection is completed, the device is driven to the front of the ridge where the stalk cutting operation is to be performed, and the universal wheel 902 of the depth-limiting wheel assembly 9 is aligned with the center of the ridge surface;

[0150] Adjust the height of the depth-limiting wheel assembly 9 from the ground according to the needs of stalk cutting, and then adjust the hydraulic control valve of the hydraulic cylinder 3 to a floating state;

[0151] After the hooking and adjustment are completed, the hydraulic motor control valve of the hydraulic motor 4 is opened, and the output shaft of the hydraulic motor 4 drives the main shaft 507 to rotate at high speed through the shaft sleeve 501, so that the first main gear 504 at the lower end of the main shaft 507 rotates. At the same time, the main shaft 507 drives the driven shaft 511 to rotate at high speed through the transmission of the driving gear 509 and the driven gear 513, so that the second main gear 505 at the lower end of the driven shaft 511 rotates;

[0152] The first main gear 504 drives the chain saw 601 on the left side to rotate among the first main gear 504 , the driven side gear 602 on the left side, the tensioning gear 705 on the left side, and the bottom driving gear 1101 on the left side;

[0153] The second main gear 505 drives the right chain saw 601 to rotate among the second main gear 505, the right driven side gear 602, the right tensioning gear 705 and the right bottom driving gear 1101;

[0154] The rotation directions of the left and right chainsaws 601 are opposite;

[0155] The chain saw 601 drives the driving pulley 1116 to rotate through the corresponding bottom driving gear 1101, so that the driving pulley 1116 drives the laying conveyor belt 1107 to rotate between the driving pulley 1116 and the driven pulley 1112. The left and right sets of laying conveyor belts 1107 rotate in opposite directions, and the laying conveyor belt 1107 rotates in the same direction as the corresponding chain saw 601 below it.

[0156] The unit moves forward, the universal wheel 902 of the depth-limiting wheel assembly 9 moves along the middle of the ridge surface, and the chain saw 601 of the chain cutting assembly 6 rotates at a high speed under the drive of the hydraulic motor 4, and the left and right pressing plates 8 and the toggle plate 1109 on the outer surface of the laying conveyor belt 1107 to toggle the stems, so as to complete the cutting and laying operations of the stems;

[0157] After the operation is completed, the cut stems are tilted toward the furrows on both sides by the action of the left and right pressure plates 8 and then crushed by the front and rear wheel groups of the tractor, which greatly reduces the adverse effects on the subsequent root (stem) digging operation.

[0158] The present invention can complete the cutting and laying of two rows of upright stems in one operation, thereby greatly reducing the operation cost of harvesting root crops while improving operation efficiency and quality.

[0159] The present invention adopts the front-mounted mode, and the combined operation of the harvester connected with the rear suspension can complete the stalk removal and underground rhizome harvesting of two rows of root crops at one time, reducing the demand for manpower in the operation and the secondary rolling of the tractor on the plot.

[0160] By increasing the center distance of the middle through holes on the left and right sides of the tensioning base plate 702 for installing the seat bearing 701 and adjusting the size parameters of the left and right pressure plates 8, the tensioning base plate 702 and the left and right pressure plates 8 are remade, the distance between the left and right sets of tensioning gears 705 is increased, and then the angle α between the two chain saws 601 is increased, the cutting and laying operations of the stems of root crops planted in two ridges and a single row can be realized.

[0161] When harvesting the stems of two ridges planted in a single row (or two rows planted in flat planting) at the same time, the universal wheel 902 of the depth limiting wheel assembly 9 can move along the ditch between the two ridges (or the middle position of the two rows planted in flat planting), and the remaining operations are the same as the stem cutting and laying operations in the large ridge double row planting mode.

[0162] The present invention can complete the removal operation of upright stems under different planting modes through simple adjustment, which greatly improves the applicability of the machine to the agronomic mode.

[0163] At the same time, compared with the traditional manual stem removal operation, the present invention can be carried out simultaneously with the underground rhizome harvesting operation without the need for additional operators, which greatly reduces the demand for manpower while improving work efficiency and reducing manual labor intensity;

[0164] Compared with conventional straw crushing and returning machines, the present invention can coordinate with the harvester on the same tractor, thereby improving the operation efficiency, reducing the operation cost, and reducing the secondary crushing of the harvested plot by the tractor. At the same time, the cleared stalks are pressed down by the pressing plate of the device into the furrows on both sides, and are further crushed by the front and rear tires of the tractor, greatly reducing the adverse effects on the subsequent root (stem) harvesting operation. The device has a simple overall structure, is easy to maintain, and the working environment of the gear parts is closed and lubricated reliably. While reducing the cost of using the machine, it greatly extends the service life of the machine.

[0165] 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 front-mounted stem cutting device, comprising a mounting plate, characterized in that: The front bottom of the mounting plate is movably connected to the frame, and the frame is lifted and lowered by the hydraulic cylinder on the mounting plate; A hydraulic motor and a gear box assembly are installed at the rear of the frame, a chain cutting assembly is installed at the front lower end of the frame, the chain cutting assembly includes two groups of chain saws arranged symmetrically, and an auxiliary laying assembly and a tensioning assembly for tensioning the chain saw are also provided at the front of the frame; The laying mechanism at the top of the auxiliary laying assembly extends out through the corresponding slot on the pressing plate; A front hood is fixed at the front end of the frame, and pressure plates are symmetrically arranged on the left and right sides of the front hood at the front of the frame, and a depth limiting wheel assembly that can be adjusted up and down is installed at the lower end of the front of the frame; The hydraulic motor drives two sets of chain saws to rotate through the gear box assembly, and the chain saws rotate to cut the stems. At the same time, the chain saws also drive the laying mechanism to rotate to push the stems backwards, and then cooperate with the pressure plates on the left and right sides to lay the cut stems backwards; The chain cutting assembly also includes a side belt seat bearing fixed on the side belt seat bearing mounting seat, and the bottom of the side driven shaft in the side belt seat bearing is connected to a driven side gear; The tensioning assembly includes a seat bearing fixed symmetrically to the upper end of the tensioning base plate, a tensioning gear connected to the bottom of the tensioning driven shaft in the seat bearing after passing through the tensioning base plate, and a tensioning bolt connected between the tensioning fixed seat and the vertical plate at the rear end of the tensioning base plate. The tensioning adjustment fastener on the tensioning base plate passes through the waist-round hole on the bottom front longitudinal beam and the tensioning base to lock and fix the tensioning base plate. The auxiliary placement assembly includes a mounting seat fixed to the upper end of the bottom front longitudinal beam, a vertical shaft connected to both sides of the mounting seat, a bottom driving gear connected to the rear of the vertical shaft passing through the mounting seat, and a top plate connected to the vertical plate in the middle of the upper end of the mounting seat; The left chain saw is connected between the first main gear, the left driven side gear, the left tensioning gear and the left bottom driving gear, and the right chain saw is connected between the second main gear, the right driven side gear, the right tensioning gear and the right bottom driving gear; The laying mechanism includes a rotating drum symmetrically arranged on both sides of the top plate, an outer gear ring fixed on the outer side of the lower end of the rotating drum, a bending top seat fixed on the upper end of the rotating drum, and a laying conveyor belt arranged below the bending top seat.

2. A front-mounted stem cutting device according to claim 1, characterized in that: The mounting plate includes an upper hanging plate, a handle, a lower hanging plate, an intermediate fixing seat, a lower plate, a front plate, a side plate, an upper plate and a semicircular steel bar; The upper plate and the lower plate are welded to the upper and lower end surfaces of the front plate respectively, and the four side plates are welded to the upper and lower parts of the left and right end surfaces of the front plate in a symmetrical manner, and the corresponding side plates are welded and fixed to the lower surface of the upper plate and the upper surface of the lower plate respectively; Two upper suspension plates are welded to the upper surface of the upper plate and the upper end of the front surface of the front plate, and two lower suspension plates are welded to the lower surface of the lower plate and the lower end of the front surface of the front plate; The middle fixing seat and the semicircular steel bar are welded to the middle of the rear surface of the front plate and the middle of the lower surface of the upper plate respectively; The two handles at the left and right ends are respectively welded to the outer surfaces of the two side panels on both sides; The upper plate and the lower plate are symmetrical structures.

3. A front-mounted stem cutting device according to claim 2, characterized in that: The rear end of the hydraulic oil cylinder is movably connected between the two upper suspension plates by a pin shaft.

4. A front-mounted stem cutting device according to claim 3, characterized in that: The frame includes a lower suspension round tube, an upper front crossbeam, a bottom side longitudinal beam, a bottom middle longitudinal beam, a bottom front longitudinal beam, a tensioning base, a depth limiting wheel mounting seat, a pressure plate front fixing seat, a tensioning fixing seat, a reinforcing plate, a side belt seat bearing mounting seat, a bottom front crossbeam, a hydraulic motor seat, an upper rear crossbeam, an upper middle longitudinal beam and a bottom rear crossbeam; The lower suspension round tube is a cylindrical round tube structure, and the lower suspension round tube is hinged between the two lower suspension plates through a pin shaft, and the front parts of both ends of the lower suspension round tube are connected to the upper rear cross beam and the rear end of the bottom rear cross beam through supporting round tubes; A hydraulic cylinder lower suspension seat is welded to the middle part of the upper surface of the upper front cross beam and the upper rear cross beam, and a piston rod at the output end of the hydraulic cylinder is movably connected to the hydraulic cylinder lower suspension seat through a pin shaft; The two upper middle longitudinal beams are respectively welded to the rear surface of the upper front cross beam, the front surface of the upper rear cross beam and the bottom surface of the lower suspension seat of the hydraulic cylinder; The hydraulic motor seat is welded to the front surface of the upper front cross beam, and the hydraulic motor is fixed to the upper end of the hydraulic motor seat; The two bottom longitudinal beams are respectively located at the outside of the bottom of the frame, and two through holes for fixing the inner wall of the side of the pressing plate are opened on the side of the front end of the bottom longitudinal beam; The gearbox assembly is fixed on the two bottom middle longitudinal beams, the front and rear end surfaces of the two bottom middle longitudinal beams are welded to the bottom front cross beam and the bottom rear cross beam respectively, and the middle parts of the sides of the two bottom middle longitudinal beams are also welded and fixed to the corresponding bottom side longitudinal beams through cross beams; The bottom surfaces of the two side belt seat bearing mounting seats are respectively welded to the upper surfaces of the bottom side longitudinal beam and the bottom front cross beam; The two ends of the bottom front longitudinal beam are respectively welded to the front surface of the bottom front cross beam, the reinforcement plate and the rear surface of the depth-limiting wheel mounting seat, and the upper surface and the lower surface of the bottom front longitudinal beam are respectively welded with a tensioning fixing seat and a tensioning base; The front fixing seat of the pressing plate is welded at the upper positions of the two side surfaces of the depth limiting wheel mounting seat, and the inner wall of the front end of the pressing plate is fixed on the front fixing seat of the pressing plate.

5. A front-mounted stem cutting device according to claim 4, characterized in that: The gear box assembly includes a shaft sleeve, an upper cover, a bottom bin, a grease nipple, a main shaft, a driving gear, a driven shaft, a sealing paper gasket and a driven gear; The bottom bin is fixed on two bottom middle longitudinal beams, and the sealing paper pad is arranged between the upper cover and the bottom bin; The top of the main shaft extends out of the upper cover and is connected to the output shaft of the hydraulic motor through a shaft sleeve. The bottom of the main shaft extends out of the bottom bin and is connected to the first main gear. The driving gear is fixed in the middle of the main shaft. The bottom of the driven shaft extends out of the bottom bin and is connected to the second main gear, and the driven gear is fixed on the upper part of the driven shaft; The driving gear meshes with the driven gear; The upper cover and the bottom bin are both provided with single-sided deep groove ball bearings with sealing rings, and the single-sided deep groove ball bearings with sealing rings are sleeved on the main shaft and the driven shaft respectively; The interior of the bottom bin is also provided with a rubber sealing ring sleeved on the driven shaft of the main shaft; The grease nipple is arranged on the top of the upper cover.

6. A front-mounted stem cutting device according to claim 1, characterized in that: The outer side of the chain saw is provided with cutting blades at equal intervals. To avoid collision between the cutting blades on the chain saws on both sides, the chain saws on both sides are installed in opposite ways.

7. The front-mounted stem cutting device according to claim 1, characterized in that: The upper end of the vertical shaft extends through the top bearing inside the drum and is connected to a driving pulley, and the driving pulley is connected to the inside of the inner end of the laying conveyor belt; The bottom of the outer end of the bent top seat is movably connected with a driven pulley, and the outer end of the laying conveyor belt extends through the notch on the side of the upper end of the rotating drum and is sleeved on the driven pulley; A guide pulley is movably connected to the bottom of the bending part of the bending top seat, and the guide pulley is located inside the laying conveyor belt to guide the laying conveyor belt; Guide side plates are provided on both sides of the lower end of the bending part of the bending top seat, and two sets of guide side plates are located on both sides of the laying conveyor belt; The outer surface of the laying conveyor belt is provided with toggle plates at equal intervals; A tension spring is also connected between the front parts of the two groups of bent top seats, and the inner sides of the two groups of outer tooth rings extend into the rectangular through grooves on the upper parts of the vertical plates and mesh with each other.

8. The front-mounted stem cutting device according to claim 4, characterized in that: The depth limiting wheel assembly comprises a universal wheel and a wheel seat fixed on the top of the universal wheel, the wheel seat extends into the depth limiting wheel mounting seat, and the fixing bolts on the depth limiting wheel mounting seat are screwed into corresponding screw holes on the wheel seat.

Images