Harvester cutting device with anti-bounce function

Abstract

The utility model discloses a cutting device of harvester with anti -jump function belongs to agricultural machinery technical field. The device aims at solving the problem of high failure rate, low cutting efficiency and hidden danger of safety of traditional harvester caused by cutter jumping. Its technical scheme mainly includes: on the basis of the transmission system composed of cutter swing arm, connecting plate, movable cutter group connecting seat etc. adds bearing on the pin shaft of movable cutter group connecting seat, and sets up a movable cutter group limit welding with linear recess on its top, and the limit welding is installed on the cutter table frame through long round hole. The utility model tightens bearing through recess, forces the stable linear motion of cutter blade, avoids jumping collision, and the height of limit welding is adjustable, can compensate wear and tear, and keeps the limiting effect for a long time. Its beneficial effect lies in that it significantly reduces the failure rate and maintenance cost, improves the harvesting efficiency and operation safety, and the structure is reliable and practical.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment technology, and in particular to a harvester cutting device with anti-jump function. Background Technology

[0002] Currently, most grain harvester cutting devices utilize a cutter arm that drives a connecting plate via a pin, thereby inducing reciprocating motion of the moving blades. However, this traditional structure has inherent drawbacks: due to the lack of an effective radial limiting mechanism in its transmission chain, the moving blade assembly connecting seat and the moving blades are prone to vertical jumping rather than stable linear motion under the combined effects of the cutter arm's swing and the machine's overall vibration. This not only causes collisions and wear between the moving blades and the blade guard, resulting in a high failure rate and incomplete cutting efficiency, but also poses a potential safety hazard due to flying fragments from broken parts. Therefore, providing a cutting device that can effectively suppress jumping and ensure motion stability has become an urgent problem to be solved in this field. Utility Model Content

[0003] The purpose of this invention is to overcome the deficiencies in the prior art and provide a harvester cutting device with anti-jumping function.

[0004] To achieve the aforementioned utility model objective, the present utility model adopts the following technical solution: a harvester cutting device with anti-jump function, comprising a cutter arm, a connecting plate, a moving blade assembly connecting seat, a cutter fixing seat, and a blade protector. One end of the connecting plate is rotatably connected to the cutter arm via a first fixing pin, and the other end of the connecting plate is rotatably connected to the moving blade assembly connecting seat via a second fixing pin. The blade protector is connected to the cutter fixing seat via bolts. The cutter fixing seat is fixed on the header frame. The device is characterized by further including a moving blade assembly limiting weld and a bearing. The bearing is mounted on the second fixing pin. The moving blade assembly limiting weld is fixed to the header frame via bolts, and its bottom surface has a groove. The bearing is nested in the groove. The moving blade assembly limiting weld is connected to the header frame via an elongated hole in the vertical direction.

[0005] Furthermore, the limiting welding of the moving blade assembly forces the moving blade assembly connecting seat to make a stable linear reciprocating motion by clamping the bearing, thereby preventing radial runout during operation.

[0006] Furthermore, the groove is a straight groove, the shape of which is adapted to the outer ring of the bearing, thereby providing precise guidance and stable positioning for the reciprocating motion of the bearing.

[0007] Furthermore, the moving blade assembly limit welding is moved up and down by adjusting the position of the bolt in the elongated hole, thereby compensating for the wear of the working surface of the moving blade assembly limit welding, or adjusting the tightness of the bearing.

[0008] Furthermore, the moving blade assembly connector is used to install the moving blade, which maintains a constant gap with the blade guard, so that the moving blade and the blade guard can maintain a uniform and reliable cutting fit throughout the entire reciprocating motion.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. This utility model effectively limits the radial runout of the moving blade assembly connecting seat during operation by setting a grooved limit welding clamp to the bearing connected to the moving blade assembly connecting seat, forcing it to only perform stable linear reciprocating motion. This fundamental improvement ensures that the moving blade and the guard maintain a constant optimal fit clearance, completely avoiding abnormal collisions, wear, or even component breakage caused by unstable motion trajectory, thereby greatly reducing equipment failure rate and maintenance costs, and significantly improving the reliability and durability of the cutting device.

[0011] 2. In this device, the moving blade assembly is connected to the frame via upper and lower elongated holes, making its height adjustable. This design not only facilitates initial installation and debugging but also effectively compensates for wear on the working surfaces of the limiting weld, maintaining a persistent clamping force on the bearings and ensuring long-term anti-vibration performance. Stable linear motion results in uniform and powerful cutting force from the moving blades, significantly improving harvesting efficiency and cutting quality. Simultaneously, it fundamentally eliminates safety hazards caused by flying fragments, making its overall performance significantly superior to traditional structures. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] Figure 1 This is a schematic diagram of the moving blade in this utility model moving to the leftmost end.

[0014] Figure 2 This is a schematic diagram of the moving blade in this utility model moving to the rightmost end.

[0015] The attached figures are labeled as follows:

[0016] 1. Cutter arm; 2. Connecting plate; 3. Moving blade assembly limit welding; 4. Bearing; 5. First fixing pin; 6. Moving blade assembly connecting seat; 7. Cutter fixing seat; 8. Blade guard; 9. Second fixing pin. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0018] Example

[0019] like Figure 1 and Figure 2 As shown, this embodiment provides a harvester cutting device with anti-jump function, which mainly includes a cutter swing arm 1, a connecting plate 2, a moving blade assembly limit welding 3, a bearing 4, a first fixed pin 5, a moving blade assembly connecting seat 6, a cutter fixing seat 7, a blade protector 8, and a second fixed pin 9.

[0020] One end of the connecting plate 2 is hinged to the cutter arm 1 via a first fixed pin 5, allowing it to rotate relative to the cutter arm 1; the other end is hinged to the upper end of the moving blade assembly connecting seat 6 via a second fixed pin 9. The bearing 4 is preferably a deep groove ball bearing, its inner ring tightly fitted onto the second fixed pin 9, and can rotate synchronously with it. The lower end of the moving blade assembly connecting seat 6 is used to mount the moving blade (not shown in the figure) via bolts. The blade guard 8 is fixed to the cutter mounting seat 7 via bolts, and the moving blade reciprocates within the guide groove of the blade guard 8. The cutter mounting seat 7 is fastened to the header frame of the harvester (not shown in the figure) via bolts.

[0021] The core improvement of this utility model lies in the moving blade assembly limiting weld 3 and its installation method. This moving blade assembly limiting weld 3 is made of stamped or welded steel plate and is bolted to the cutter frame, located directly above the bearing 4. Crucially, a straight groove is machined on its bottom surface facing the bearing 4. The contour of this groove matches the curvature of the outer ring of the bearing 4, allowing the outer ring of the bearing 4 to fit precisely into this groove and roll within it. Furthermore, the bolts used to fix the moving blade assembly limiting weld 3 pass through elongated holes extending vertically, rather than ordinary round holes.

[0022] Working process and principle

[0023] During operation, the power source drives the cutter arm 1 to swing back and forth. The swinging force is transmitted to the connecting plate 2 through the first fixed pin 5, and the connecting plate 2 then drives the moving blade assembly connecting seat 6 and its moving blades together through the second fixed pin 9. During this process, the bearing 4 installed on the second fixed pin 9 also rolls back and forth in the straight groove of the moving blade assembly limiting weld 3.

[0024] The core function of the moving blade assembly limiting weld 3 is to press and constrain the bearing 4 from above through its groove structure. When the swing of the cutter arm 1 or the vibration of the whole machine attempts to cause the moving blade assembly connecting seat 6 to jump upward, the bearing 4 will move upward, but will be immediately pressed down by the top of the groove of the moving blade assembly limiting weld 3, thus converting the jumping tendency into a positive pressure on the groove wall, while the rolling of the bearing 4 greatly reduces frictional resistance. This design cleverly limits the potential radial runout to the micron level, forcing the moving blade assembly connecting seat 6 to only make stable linear reciprocating motion in the direction specified by the groove (i.e., the horizontal direction), thereby ensuring that the moving blade and the guard 8 always maintain a constant optimal cutting gap, completely avoiding collisions, wear, chipping, or even breakage caused by unstable movement trajectory.

[0025] Furthermore, the moving blade assembly limit welding 3 is installed through an elongated hole, making it highly adjustable. If the working surface of this limit welding is worn due to bearing rolling, resulting in a decrease in the clamping force on the bearing 4, simply loosen the bolts and adjust the entire moving blade assembly limit welding 3 downward by a small distance to restore the effective clamping and limiting function, greatly extending the effective service life of the device and reducing maintenance and replacement costs.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A harvester cutting device with anti-jump function, comprising a cutter arm (1), a connecting plate (2), a moving blade assembly connecting seat (6), a cutter fixing seat (7), and a blade protector (8), wherein one end of the connecting plate (2) is rotatably connected to the cutter arm (1) via a first fixing pin (5), and the other end of the connecting plate (2) is rotatably connected to the moving blade assembly connecting seat (6) via a second fixing pin (9), the blade protector (8) is connected to the cutter fixing seat (7) by bolts, and the cutter fixing seat (7) is fixed on the cutter frame, characterized in that, It also includes a moving blade assembly limiting weld (3) and a bearing (4). The bearing (4) is mounted on the second fixed pin (9). The moving blade assembly limiting weld (3) is fixed to the cutting table frame by bolts, and its bottom surface is provided with a groove. The bearing (4) is nested in the groove. The moving blade assembly limiting weld (3) is connected to the cutting table frame through an elongated hole in the vertical direction.

2. A harvester cutting device with anti-jump function according to claim 1, characterized in that: The moving blade assembly limiting welding (3) restricts the movement of the moving blade assembly connecting seat (6) by pressing the bearing (4).

3. A harvester cutting device with anti-jump function according to claim 1, characterized in that: The groove is a straight groove, and its shape is adapted to the outer ring of the bearing (4).

4. A harvester cutting device with anti-jump function according to claim 1, characterized in that: The moving knife assembly limit welding (3) is moved up and down by adjusting the position of the bolt in the elongated hole.

5. A harvester cutting device with anti-jump function according to any one of claims 1 to 4, characterized in that: The moving blade assembly connector (6) is used to install the moving blade, and the moving blade and the guard (8) maintain a constant gap.

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