Chain-free transmission mechanism of cutter group on rape harvester

Abstract

The utility model discloses a chain-free transmission mechanism of an upper cutter group of a rape harvester. The chain-free transmission mechanism comprises a rack, a vertical cutter group, a horizontal cutter group and a conversion block, the rack is a mounting frame of the rape harvester; a rotating rod of a horizontal rod-shaped structure is rotationally matched with the rack through a bearing seat, an eccentric wheel is fixed to one end of the rotating rod, an eccentric shaft is arranged on the eccentric wheel, a first connecting rod is matched with the eccentric shaft through a spherical hinge, and the other end of the first connecting rod is matched with a horizontal cutter set driving assembly through a spherical hinge. The horizontal cutter set driving assembly drives a horizontal moving cutter in the horizontal cutter set to reciprocate, the side, away from the first connecting rod, of the horizontal cutter set driving assembly drives the vertical cutter set driving assembly to reciprocate through a second connecting rod, and the vertical cutter set driving assembly drives a vertical moving cutter in the vertical cutter set to reciprocate. The device has the beneficial effects of small occupied space, low fault probability and low maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of rapeseed harvesters, and particularly relates to a chain-free transmission mechanism of a cutter group on a rapeseed harvester. Background Art

[0002] The patent document with publication number CN220326272U discloses a front-mounted windrower that is universal for tall and short crops. The horizontal cutting knife assembly and the straw-pulling assembly are both located at the front end of the frame. A material conveyor belt is provided on the rear side of the horizontal cutting knife assembly. A conveying auger and a material baffle are provided in sequence on the side of the material conveyor belt away from the horizontal cutting knife assembly. A vertical cutting knife assembly is provided at one end of the horizontal cutting knife assembly. The vertical cutting knife assembly is fixedly connected to the side of the frame away from the material conveyor belt outlet. For taller plants, the conveying auger and the material conveyor belt can be used to synchronously convey the top and stem of the plant, respectively, to ensure that the plants will not block the inside of the windrower. The vertical cutting knife assembly can cut the stems and vines of the plants on the side of the frame away from the material conveyor belt to prevent the stems and vines of the plants on both sides of the vertical cutting knife assembly from being entangled.

[0003] The above-mentioned reaper is usually used for rapeseed harvesting operations. It is provided with two sets of cutters, namely horizontal cutters and vertical cutters. When working, the power is output by the combine harvester, and the horizontal cutters and vertical cutters, as well as the transverse conveyor belt and the longitudinal conveyor belt, are driven through the transmission mechanism. When traveling in the field, under the action of the reel, the rapeseed stems to be cut are guided toward the main cutter, and the stems are supported when the cutter cuts, and the cut stems are pushed toward the header conveyor. Under the action of the vertical cutter, the cut rapeseed is separated from the uncut rapeseed, and under the action of the transverse conveyor belt and its conveying spring teeth, the cut rapeseed is conveyed to the longitudinal conveyor belt. Under the action of the longitudinal conveyor belt and its conveying spring teeth, the rapeseed is discharged smoothly and spread out in the field for drying, which is convenient for subsequent picking operations. At the same time, under the action of the vertical cutter, the branches of the harvesting area and the area to be cut are cut off to achieve the purpose of branching, which solves the problem of pod loss caused by the mutual involvement of rapeseed branches during the harvesting process.

[0004] However, the transmission between the horizontal cutting knife and the vertical cutting device in the above-mentioned comparative document relies on a large number of sprocket-chain mechanisms for transmission, which not only takes up a large space, but also the crop straw during harvesting can easily enter the sprocket-chain mechanism, causing "chain off" or "machine jamming" failure phenomena, affecting the harvesting progress. Utility Model Content

[0005] The utility model aims to provide a chain-free transmission mechanism for a cutting knife group on a rapeseed harvester to solve the technical problems in the above-mentioned background technology that crop straw easily enters the sprocket-chain mechanism during harvesting, causing "chain off" or "machine jamming" and occupying a large space.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A chain-free transmission mechanism for a cutting knife group on a rapeseed harvester, comprising a frame, a vertical knife group, a horizontal knife group and a conversion block; the frame is a mounting frame for the rapeseed harvester; the vertical knife group consists of a vertical fixed knife and a vertical movable knife that are slidably matched, and the vertical fixed knife is fixed on the frame; the horizontal knife group consists of a horizontal fixed knife and a horizontal movable knife that are slidably matched, and the horizontal fixed knife is fixed on the frame; a rotating rod with a horizontal rod-shaped structure is rotatably matched on the frame using a bearing seat, an eccentric wheel is fixed at one end of the rotating rod, an eccentric shaft is provided on the eccentric wheel, a first connecting rod is matched with the eccentric shaft through a ball joint, and the other end of the first connecting rod is matched with a horizontal knife group driving assembly through a ball joint, and the horizontal knife group driving assembly drives the horizontal movable knife in the horizontal knife group to reciprocate, and the side of the horizontal knife group driving assembly away from the first connecting rod drives the vertical knife group driving assembly to reciprocate through the second connecting rod, and the vertical knife group driving assembly drives the vertical movable knife in the vertical knife group to reciprocate.

[0008] Furthermore, the horizontal knife group driving assembly includes: a first rotating column, a first rotating block, a first ball joint head, a second ball joint head, a first rotating wheel, and a first hinge seat; the first rotating column is a cylindrical structure, and its two ends are rotatably matched on two groups of first hinge seats by an axle rod, and the first hinge seat is fixed on the frame, and a first rotating block with a plate-like structure is provided on the first rotating column, and the first rotating block can rotate along with the first rotating column, and a second ball joint head is provided on the side of the first rotating block close to the rotating rod, and the second ball joint head and the first connecting rod are matched through a ball joint, and the side of the first rotating block away from the second ball joint head is located directly above the horizontal knife group, and the first rotating block is rotatably matched with a first rotating wheel with a wheel structure through an axle rod on the side close to the horizontal knife group, and the first rotating wheel drives the horizontal movable knife to reciprocate through a soft connection, and the first rotating block is fixed with a first ball joint head on the back side of the first rotating wheel, and the first ball joint head is connected to the second connecting rod through a ball joint.

[0009] Furthermore, the vertical tool group drive assembly includes: a second rotating column, a second rotating block, a third ball joint head, a second rotating wheel, and a second hinge seat; the second rotating column is a cylindrical structure with a horizontal axis, and its two ends are rotatably engaged on the second hinge seat by an axle rod, and the second hinge seat is fixed on the frame, and a second rotating block with a plate-like structure is provided on the second rotating column, and the second rotating block can rotate along with the second rotating column, and a third ball joint head is provided on the side of the second rotating block close to the rotating rod, and the third ball joint head and the second connecting rod are engaged by a ball joint; the side of the second rotating block close to the vertical tool group is rotatably engaged with a second rotating wheel with a wheel structure through an axle rod, and the second rotating wheel drives the vertical movable knife to reciprocate through a soft connection.

[0010] Furthermore, in order to convert the reciprocating motion of the horizontal knife group drive assembly and the vertical knife group drive assembly into the cutting action of the vertical knife group and the horizontal knife group; the conversion block is a block structure, with two groups in total, which are respectively connected to the vertical knife group and the horizontal knife group, and one side of the conversion block is provided with a recessed position for accommodating the first rotating wheel and the second rotating wheel to be embedded; when the conversion block cooperates with the vertical knife group, the conversion block is fixed on the vertical moving knife, the recessed position of the conversion block is embedded on the second rotating wheel, and the second rotating wheel and the recessed position are not fixedly connected; when the conversion block cooperates with the horizontal knife group, the conversion block is fixed on the horizontal moving knife, the recessed position of the conversion block is embedded on the first rotating wheel, and the first rotating wheel and the recessed position are not fixedly connected.

[0011] Furthermore, in order to further improve the anti-jamming capability of the utility model, a driving pulley is coaxially fixed to the end of the rotating rod away from the eccentric wheel, and the driving pulley cooperates with the rotating main shaft belt of the rapeseed harvester.

[0012] Furthermore, in order to increase the cutting capacity of the vertical knife group and the horizontal knife group, the outer sides of the vertical fixed knife, the vertical movable knife, the horizontal fixed knife, and the horizontal movable knife are all serrated knife groups, and both sides of the serrations are sharpened. The serrations form a shearing structure between the slidingly fitted vertical fixed knife and the vertical movable knife, and between the horizontal fixed knife and the horizontal movable knife.

[0013] Furthermore, in order to reduce the weight of the device and increase the transmission efficiency, the first connecting rod and the second connecting rod are both made of hollow metal rods.

[0014] Furthermore, in order to reduce the vibration generated when the rotating rod and the eccentric wheel rotate as a whole, the mass of the eccentric wheel on the side away from the eccentric shaft is greater than the mass of the eccentric wheel on the side close to the eccentric shaft.

[0015] Furthermore, in order to increase the durability and anti-extrusion capability of the first rotating wheel and the second rotating wheel, the first rotating wheel and the second rotating wheel are both metal bearings.

[0016] In summary, the utility model has the following beneficial effects:

[0017] ① Small space occupation: The transmission of this application mainly relies on the first connecting rod and the second connecting rod for power transmission. Compared with the sprocket-chain transmission mechanism, it occupies less space and has a lower equipment weight.

[0018] ② Low failure probability and low maintenance cost: The cutting actions of the vertical knife group and the horizontal knife group of the present application do not rely on the sprocket chain transmission, avoiding the risk of rapeseed straw entering the sprocket chain transmission parts and causing "machine jamming" and "chain derailment". At the same time, the probability of the ball joint connection entering the rapeseed straw is also low, resulting in a longer service life of this transmission structure, effectively extending the maintenance cycle, and further reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the transmission structure of the utility model;

[0021] Figure 3 yes Figure 2 A magnified view of the structure in the middle;

[0022] Figure 4 yes Figure 2 A magnified view of the structure at B in the middle;

[0023] Figure 5 This is a schematic diagram of the application of the utility model on a rapeseed harvester;

[0024] In the figure, 1, frame; 2, rotating rod; 3, eccentric wheel; 4, horizontal knife group drive assembly; 5, first connecting rod; 6, vertical knife group drive assembly; 7, second connecting rod; 8, vertical knife group; 9, horizontal knife group; 10, conversion block; 21, driving pulley; 31, eccentric shaft; 41, first rotating column; 42, first rotating block; 43, first ball joint; 44, second ball joint; 45, first rotating wheel; 46, first hinge seat; 61, second rotating column; 62, second rotating block; 63, third ball joint; 64, second rotating wheel; 65, second hinge seat; 81, vertical fixed knife; 82, vertical moving knife; 91, horizontal fixed knife; 92, horizontal moving knife; 101, concave position. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example:

[0027] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0028] A chain-free transmission mechanism for a cutting knife group on a rapeseed harvester, comprising a frame 1, a vertical knife group 8, a horizontal knife group 9, and a conversion block 10; the frame 1 is a mounting frame for the rapeseed harvester; the vertical knife group 8 is composed of a vertical fixed knife 81 and a vertical movable knife 82 that are slidably matched, and the vertical fixed knife 81 is fixed on the frame 1; the horizontal knife group 9 is composed of a horizontal fixed knife 91 and a horizontal movable knife 92 that are slidably matched, and the horizontal fixed knife 91 is fixed on the frame 1; a rotating rod 2 with a horizontal rod-shaped structure is rotatably matched with a bearing seat on the frame 1, and the rotating rod 2 is rotatably matched with a bearing seat. An eccentric wheel 3 is fixed at one end of the rod 2, and an eccentric shaft 31 is provided on the eccentric wheel 3. The eccentric shaft 31 is matched with a first connecting rod 5 through a ball joint. The other end of the first connecting rod 5 is matched with a horizontal knife group driving component 4 through a ball joint. The horizontal knife group driving component 4 drives the horizontal movable knife 92 in the horizontal knife group 9 to reciprocate. The side of the horizontal knife group driving component 4 away from the first connecting rod 5 drives the vertical knife group driving component 6 to reciprocate through the second connecting rod 7. The vertical knife group driving component 6 drives the vertical movable knife 82 in the vertical knife group 8 to reciprocate.

[0029] The horizontal knife group drive assembly 4 includes: a first rotating column 41, a first rotating block 42, a first ball joint head 43, a second ball joint head 44, a first rotating wheel 45, and a first hinge seat 46; the first rotating column 41 is a columnar structure, and its two ends are rotatably matched on two groups of first hinge seats 46 by using an axial rod, and the first hinge seat 46 is fixed on the frame 1. A first rotating block 42 with a plate-like structure is provided on the first rotating column 41, and the first rotating block 42 can rotate with the first rotating column 41. The side of the first rotating block 42 close to the rotating rod 2 is provided with a first rotating wheel. Two ball joint heads 44, the second ball joint head 44 and the first connecting rod 5 are matched through a ball joint, the side of the first rotating block 42 away from the second ball joint head 44 is located directly above the horizontal knife group 9, the first rotating block 42 is rotatably matched with a first rotating wheel 45 of a wheel structure through an axial rod on the side close to the horizontal knife group 9, the first rotating wheel 45 drives the horizontal movable knife 92 to reciprocate through a soft connection, the first rotating block 42 is fixed with a first ball joint head 43 on the back side of the first rotating wheel 45, and the first ball joint head 43 is connected to the second connecting rod 7 through a ball joint.

[0030] The vertical knife group drive assembly 6 includes: a second rotating column 61, a second rotating block 62, a third ball joint head 63, a second rotating wheel 64, and a second hinge seat 65; the second rotating column 61 is a cylindrical structure with a horizontal axis, and its two ends are rotatably engaged on the second hinge seat 65 by an axle rod, and the second hinge seat 65 is fixed on the frame 1. A second rotating block 62 with a plate-like structure is provided on the second rotating column 61, and the second rotating block 62 can rotate with the second rotating column 61. A third ball joint head 63 is provided on the side of the second rotating block 62 close to the rotating rod 2, and the third ball joint head 63 and the second connecting rod 7 are engaged by a ball joint; the second rotating block 62 is engaged with a second rotating wheel 64 with a wheel structure through an axle rod rotation on the side close to the vertical knife group 8, and the second rotating wheel 64 drives the vertical movable knife 82 to reciprocate through a soft connection.

[0031] The conversion block 10 is a block structure, with two groups in total, which are connected to the vertical knife group 8 and the horizontal knife group 9 respectively. One side of the conversion block 10 is provided with a recess 101 that can accommodate the first rotating wheel 45 and the second rotating wheel 64 to be embedded; when the conversion block 10 cooperates with the vertical knife group 8, the conversion block 10 is fixed on the vertical movable knife 82, the recess 101 of the conversion block 10 is embedded on the second rotating wheel 64, and the second rotating wheel 64 and the recess 101 are not fixedly connected; when the conversion block 10 cooperates with the horizontal knife group 9, the conversion block 10 is fixed on the horizontal movable knife 92, the recess 101 of the conversion block 10 is embedded on the first rotating wheel 45, and the first rotating wheel 45 and the recess 101 are not fixedly connected.

[0032] A driving pulley 21 is coaxially fixed to one end of the rotating rod 2 away from the eccentric wheel 3, and the driving pulley 21 cooperates with the rotating main shaft belt of the rapeseed harvester.

[0033] The outer sides of the vertical fixed knife 81, the vertical movable knife 82, the horizontal fixed knife 91, and the horizontal movable knife 92 are all serrated knife groups, and both sides of the serrations are sharpened. The serrations form a shearing structure between the slidingly fitted vertical fixed knife 81 and the vertical movable knife 82, and between the horizontal fixed knife 91 and the horizontal movable knife 92.

[0034] The first connecting rod 5 and the second connecting rod 7 are both made of hollow metal rods.

[0035] The mass of the eccentric wheel 3 at a side away from the eccentric shaft 31 is greater than the mass of the eccentric wheel 3 at a side close to the eccentric shaft 31 .

[0036] The first rotating wheel 45 and the second rotating wheel 64 are both metal bearings.

[0037] When in use, the driving pulley 21 is used to connect the rotating main shaft of the rapeseed harvester. When the rapeseed harvester is working, its rotating main shaft rotates, and the rotating main shaft drives the driving pulley 21 and the rotating rod 2 to rotate through the belt. The rotating rod 2 drives the eccentric wheel 3 connected to it to rotate. Because the first connecting rod 5 and the eccentric shaft 31 on the eccentric wheel 3 are matched through a ball joint, the first connecting rod 5 will be driven by the rotating eccentric wheel 3 to reciprocate.

[0038] The other end of the reciprocating first connecting rod 5 is matched with the first rotating block 42 through a ball joint, so the first connecting rod 5 will drive the first rotating block 42 to perform reciprocating deflection motion around the first rotating column 41, and then the first rotating wheel 45 under the first rotating block 42 will also reciprocate and deflect with the first rotating block 42, thereby driving the embedded conversion block 10 to reciprocate. Because the conversion block 10 is connected to the horizontal movable knife 92, the horizontal movable knife 92 will be driven by the conversion block 10 to reciprocate and complete the reciprocating cutting motion between the horizontal fixed knife 91.

[0039] The first rotating block 42 that reciprocates drives the second connecting rod 7 on it that is fitted with a ball joint to follow the movement, and the second connecting rod 7 drives the second rotating block 62 to reciprocate around the second rotating column 61, and then the second rotating wheel 64 on the second rotating block 62 follows the reciprocating deflection of the second rotating block 62, and the reciprocating deflection of the second rotating block 62 drives the embedded conversion block 10 to reciprocate, and because the conversion block 10 is connected to the vertical movable knife 82, the vertical movable knife 82 will be driven by the conversion block 10 to reciprocate and complete the reciprocating cutting movement between the vertical fixed knife 81.

[0040] In combination with the above principles, the cutting actions of the vertical knife group 8 and the horizontal knife group 9 of the present application do not rely on the sprocket chain transmission, thereby avoiding the risk of rapeseed straw entering the sprocket chain transmission parts and causing "machine jamming". At the same time, the probability of the ball joint connection entering the rapeseed straw is also low, resulting in a longer service life of this transmission structure, effectively extending the maintenance cycle, and further reducing the maintenance cost.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A chain-free transmission mechanism for a cutter group on a rapeseed harvester, comprising: A frame (1), a vertical knife group (8), a horizontal knife group (9), and a conversion block (10); characterized in that: the frame (1) is a mounting frame of a rapeseed harvester; the vertical knife group (8) is composed of a vertical fixed knife (81) and a vertical movable knife (82) that are slidably matched, and the vertical fixed knife (81) is fixed on the frame (1); the horizontal knife group (9) is composed of a horizontal fixed knife (91) and a horizontal movable knife (92) that are slidably matched, and the horizontal fixed knife (91) is fixed on the frame (1); A rotating rod (2) with a horizontal rod-shaped structure is rotatably matched with a bearing seat on the frame (1); an eccentric wheel (3) is fixed at one end of the rotating rod (2); an eccentric shaft (31) is provided on the eccentric wheel (3); a first connecting rod (5) is matched with the eccentric shaft (31) through a ball joint; the other end of the first connecting rod (5) is matched with a horizontal knife group driving component (4) through a ball joint; the horizontal knife group driving component (4) drives the horizontal movable knife (92) in the horizontal knife group (9) to make reciprocating motion; the side of the horizontal knife group driving component (4) away from the first connecting rod (5) drives the vertical knife group driving component (6) to make reciprocating motion through a second connecting rod (7); and the vertical knife group driving component (6) drives the vertical movable knife (82) in the vertical knife group (8) to make reciprocating motion.

2. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 1, characterized in that: The horizontal knife group drive assembly (4) comprises: a first rotating column (41), a first rotating block (42), a first ball joint (43), a second ball joint (44), a first rotating wheel (45), and a first hinge seat (46); the first rotating column (41) is a columnar structure, and its two ends are rotatably matched on two groups of first hinge seats (46) by using an axial rod, and the first hinge seat (46) is fixed on the frame (1); a first rotating block (42) with a plate-like structure is provided on the first rotating column (41), and the first rotating block (42) can rotate with the first rotating column (41); a side of the first rotating block (42) close to the rotating rod (2) is provided with A second ball joint head (44) is engaged with the first connecting rod (5) through a ball joint, the first rotating block (42) is located directly above the horizontal knife group (9) on the side away from the second ball joint head (44), and the first rotating block (42) is rotatably engaged with a first rotating wheel (45) of a wheel structure on the side close to the horizontal knife group (9) through an axial rod, and the first rotating wheel (45) drives the horizontal movable knife (92) to reciprocate through a soft connection, and the first rotating block (42) is fixed with a first ball joint head (43) on the back side of the first rotating wheel (45), and the first ball joint head (43) is connected to the second connecting rod (7) through a ball joint.

3. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 2, characterized in that: The vertical knife group drive assembly (6) comprises: a second rotating column (61), a second rotating block (62), a third ball joint (63), a second rotating wheel (64), and a second hinge seat (65); the second rotating column (61) is a columnar structure with a horizontal axis, and its two ends are rotatably engaged with the second hinge seat (65) by a shaft rod, and the second hinge seat (65) is fixed on the frame (1); a second rotating block (62) with a plate-like structure is provided on the second rotating column (61), and the second rotating block (62) can rotate with the second rotating column (61); a third ball joint (63) is provided on the side of the second rotating block (62) close to the rotating rod (2), and the third ball joint (63) and the second connecting rod (7) are engaged by a ball joint; a second rotating wheel (64) with a wheel structure is rotatably engaged with the side of the second rotating block (62) close to the vertical knife group (8) by a shaft rod, and the second rotating wheel (64) drives the vertical movable knife (82) to reciprocate through a soft connection.

4. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 3, characterized in that: The conversion block (10) is a block structure, and is provided with two groups, which are respectively connected to the vertical knife group (8) and the horizontal knife group (9); one side of the conversion block (10) is provided with a recess (101) capable of accommodating the first rotating wheel (45) and the second rotating wheel (64) to be embedded; when the conversion block (10) and the vertical knife group (8) are matched, the conversion block (10) is fixed on the vertical movable knife (82), the recess (101) of the conversion block (10) is externally embedded on the second rotating wheel (64), and the second rotating wheel (64) and the recess (101) are not fixedly connected; when the conversion block (10) and the horizontal knife group (9) are matched, the conversion block (10) is fixed on the horizontal movable knife (92), the recess (101) of the conversion block (10) is externally embedded on the first rotating wheel (45), and the first rotating wheel (45) and the recess (101) are not fixedly connected.

5. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 1, characterized in that: A driving pulley (21) is coaxially fixed to one end of the rotating rod (2) away from the eccentric wheel (3), and the driving pulley (21) cooperates with the rotating main shaft belt of the rape harvester.

6. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 1, characterized in that: The outer sides of the vertical fixed knife (81), the vertical movable knife (82), the horizontal fixed knife (91) and the horizontal movable knife (92) are all knife groups with sawtooth distribution, and both sides of the sawtooth are sharpened. The sawtooth forms a shearing structure between the vertical fixed knife (81) and the vertical movable knife (82) that are slidably matched, and between the horizontal fixed knife (91) and the horizontal movable knife (92).

7. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 1, characterized in that: The first connecting rod (5) and the second connecting rod (7) are both made of hollow metal rods.

8. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 1, characterized in that: The mass of the side of the eccentric wheel (3) away from the eccentric shaft (31) is greater than the mass of the side of the eccentric wheel (3) close to the eccentric shaft (31).

9. The chain-free transmission mechanism of the upper cutter group of a rapeseed harvester according to claim 4, characterized in that: The first rotating wheel (45) and the second rotating wheel (64) are both metal bearings.

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