Balanced cutter vibration device

Abstract

The utility model discloses a balanced cutter vibration device, which comprises a power wheel, the rotating shaft is connected with the power wheel so as to drive the rotating shaft to rotate; the swing shaft is connected with the rotating shaft through a swing ring device, so that the swing shaft swings back and forth; the cutting knife is installed at the end, away from the rotating shaft, of the swing shaft through a connecting arm, and the swing shaft swings back and forth to drive the cutting knife to conduct cutting work; the balance weight piece is installed on the swing shaft, and the product of the mass of the cutting knife and the vertical distance from the cutting knife to the axis of the swing shaft is equal to the product of the mass of the balance weight piece and the vertical distance from the gravity center of the balance weight piece to the axis of the swing shaft. Through the installation of the counterweight part, the mass of the counterweight part multiplied by the vertical distance from the gravity center of the counterweight part to the axis of the swing shaft is equal to the unbalance amount of the cutting knife, so that the vibration of the cutting knife is balanced, the stability of the machine is improved, and the strength of a connecting part is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesters, and more particularly to a balanced cutter vibration device. Background Art

[0002] The current market power of the cutter is driven by a swing ring box. The input of the swing ring box is 360-degree rotational motion, and the output is a swing rod motion at a certain angle. The other is a crank rocker mechanism. The swing rod is used as the driving motion of the cutter, which is bound to cause reciprocating eccentric motion and vibration.

[0003] The main source of vibration of the cutting table of existing harvesters is the vibration of the cutting blade. Due to its high speed and large mass, the vibration of the cutting table causes fatigue fracture of the cutting table itself and its connecting parts, seriously affecting the stability of the machine. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a balanced cutting knife vibration device.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: A balanced cutting blade vibration device, comprising:

[0006] Power wheels;

[0007] A rotating shaft connected to the power wheel to drive the rotating shaft to rotate;

[0008] A swing shaft is connected to the rotating shaft via a swing ring device so that the swing shaft swings back and forth;

[0009] A cutting knife is mounted on the end of the swing shaft away from the rotating shaft through a connecting arm, and the swing shaft swings back and forth to drive the cutting knife to perform cutting work;

[0010] The counterweight is installed on the swing shaft, and the mass of the cutter multiplied by the vertical distance from the cutter to the axis of the swing shaft is equal to the mass of the counterweight multiplied by the vertical distance from the center of gravity of the counterweight to the axis of the swing shaft.

[0011] Preferably, the connecting arm is vertically perpendicular to the swing axis and faces downward, and the cutting knife is horizontally perpendicular to the connecting arm; the counterweight is vertically perpendicular to the swing axis and faces upward.

[0012] Preferably, the counterweight comprises a plurality of counterweight plates stacked laterally, and the plurality of counterweight plates are detachably fixed together by fasteners.

[0013] Preferably, a plurality of through holes are provided on the plurality of counterweight plates, and the fasteners are bolts inserted into the through holes and matched with nuts to lock the plurality of counterweight plates.

[0014] Preferably, the counterweight plate is a circular plate.

[0015] Preferably, several of the counterweight plates have a base plate detachably connected to the swing shaft.

[0016] Preferably, the counterweight is mounted on an end of the swing shaft close to the cutter.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By installing the counterweight, the mass of the counterweight multiplied by the vertical distance from the center of gravity of the counterweight to the axis of the swing shaft is equal to the imbalance of the cutter, thereby balancing the vibration of the cutter, thereby improving the stability of the machine and reducing the strength of the connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the utility model;

[0020] Figure 2 It is a side view of the utility model;

[0021] Figure 3 It is a three-dimensional diagram of the present utility model.

[0022] Description of the numbers in the figure:

[0023] 1. Power wheel; 2. Rotating shaft; 3. Swinging shaft; 4. Counterweight; 5. Connecting arm; 6. Cutting knife; 41. Base plate; 42. Counterweight plate; 43. Through hole; 44. Bolt; 45. Nut. DETAILED DESCRIPTION

[0024] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] refer to Figure 1-3 A balanced cutting knife vibration device comprises: a power wheel 1; a rotating shaft 2, connected to the power wheel 1 and thereby driving the rotating shaft 2 to rotate; a swinging shaft 3, connected to the rotating shaft 2 through a swinging ring device and thereby causing the swinging shaft 3 to swing back and forth; a cutting knife 6, mounted on the end of the swinging shaft 3 away from the rotating shaft 2 through a connecting arm 5, the swinging shaft 3 swings back and forth to drive the cutting knife 6 to perform cutting work; a counterweight 4, mounted on the swinging shaft 3, and the mass of the cutting knife 6 multiplied by the vertical distance from the cutting knife 6 to the axis center line of the swinging shaft 3 is equal to the mass of the counterweight 4 multiplied by the vertical distance from the center of gravity of the counterweight 4 to the axis center line of the swinging shaft 3.

[0026] It is understood that the power wheel 1 is a component connected to the rotary driver for power transmission, such as a pulley or a gear, but not limited thereto. The swing ring device is a component that converts the rotation of the rotating shaft 2 into the back and forth swing of the swing shaft 3. This is a prior art and will not be described in detail here. The counterweight 4 is a component used to balance vibrations. Here, the unbalance of the cutter 6 is equal to the mass of the cutter 6 multiplied by the vertical distance from the cutter 6 to the axis of the swing shaft 3. The horizontal component speed of the counterweight 4 is equal to the speed of the cutter 6, but opposite in direction. During design, the mass of the counterweight 4 multiplied by the vertical distance from the center of gravity of the counterweight 4 to the axis of the swing shaft 3 is equal to the unbalance of the cutter 6 to balance the vibration of the cutter 6.

[0027] With this configuration, the speed of the cutter blade 6 on the harvester's header follows a sinusoidal curve over time. This type of motion is the root cause of vibration, accounting for 70% of all cutter blade failures. The installation of a counterweight 4 balances the vibration of the cutter blade 6. Comparing data before and after the counterweight, the amplitude of the same point is reduced by 60% for left-right acceleration, 30% for up-and-down amplitude, and 20% for front-to-back amplitude.

[0028] In some embodiments, the connecting arm 5 is vertically perpendicular to the swing axis 3 and faces downward, the cutting blade 6 is horizontally perpendicular to the connecting arm 5, and the counterweight 4 is vertically perpendicular to the swing axis 3 and faces upward. In this way, the cutting blade 6 and the counterweight 4 are respectively located above and below the swing axis 3, which is conducive to balancing vibration.

[0029] In some embodiments, the counterweight 4 includes a plurality of counterweight plates 42 stacked laterally, and the plurality of counterweight plates 42 are detachably fixed together by fasteners. The fasteners may be clamps or screws, etc., but are not limited thereto. Multiple counterweight plates 42 can adjust the mass of the overall counterweight 4, and then adjust the balance amount according to actual conditions to improve applicability. Furthermore, a plurality of the counterweight plates 42 have a base plate 41 detachably connected to the swing shaft 3. The base plate 41 is a fixed component for mounting the counterweight 4 on the swing shaft 3. For example, it can be welded to the swing shaft 3, or it can be installed by means of a ring sleeve and a bolt 44, etc., but is not limited thereto.

[0030] Exemplarily, several counterweight plates 42 are each provided with a plurality of through-holes 43. The fasteners, such as bolts 44 inserted into the through-holes 43 and fitted with nuts 45, secure the counterweight plates 42. Furthermore, the counterweight plates 42 are circular. As will be appreciated, circular plates have a standard shape, a stable center of gravity, and facilitate stacking and installation. The through-holes 43 can also be arranged in a circular pattern based on the shape of the counterweight plates 42. Locking the counterweight plates 42 with bolts 44 and nuts 45 not only provides a stable structure but also facilitates easy adjustment and disassembly of the weight of the counterweight 4.

[0031] In some embodiments, the counterweight 4 is mounted on an end of the swing shaft 3 close to the cutter 6. In this way, the counterweight 4 is close to the cutter 6 and can effectively balance the vibration.

[0032] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solution and its improved concepts shall be covered by the scope of protection of the present invention.

Claims

1. A balanced cutter vibration device, characterized in that: include: Power wheel (1); A rotating shaft (2) is connected to the power wheel (1) to drive the rotating shaft (2) to rotate; A swing shaft (3) is connected to the rotating shaft (2) via a swing ring device so that the swing shaft (3) swings back and forth; A cutting knife (6) is mounted on an end of the swing shaft (3) away from the rotating shaft (2) through a connecting arm (5), and the swing shaft (3) swings back and forth to drive the cutting knife (6) to perform cutting work; The counterweight (4) is mounted on the swing shaft (3), and the mass of the cutter (6) multiplied by the vertical distance from the cutter (6) to the axis center of the swing shaft (3) is equal to the mass of the counterweight (4) multiplied by the vertical distance from the center of gravity of the counterweight (4) to the axis center of the swing shaft (3).

2. A balanced cutter vibration device according to claim 1, characterized in that: The connecting arm (5) is vertically perpendicular to the swing axis (3) and faces downward, and the cutting knife (6) is horizontally perpendicular to the connecting arm (5); the counterweight (4) is vertically perpendicular to the swing axis (3) and faces upward.

3. A balanced cutter (6) vibration device according to claim 1, characterized in that: The counterweight (4) comprises a plurality of counterweight plates (42) stacked transversely, and the plurality of counterweight plates (42) are detachably fixed together using fasteners.

4. A balanced cutter vibration device according to claim 3, characterized in that: A plurality of through holes (43) are provided on the plurality of counterweight plates (42), and the fasteners are bolts (44) inserted into the through holes (43) and matched with nuts (45) to lock the plurality of counterweight plates (42).

5. A balanced cutter vibration device according to claim 3, characterized in that: The counterweight plate (42) is a circular plate.

6. A balanced cutter vibration device according to claim 3, characterized in that: A plurality of the counterweight plates (42) comprises a base plate (41) detachably connected to the swing shaft (3).

7. A balanced cutter vibration device according to claim 1, characterized in that: The counterweight (4) is mounted on one end of the swing shaft (3) close to the cutting knife (6).

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