Adjustable piston roller mechanism for large square bale balers

Abstract

An adjustable piston roller mechanism for a large square baler includes a bushing rotatably mounted on a piston. An eccentric hole is formed along the length of the bushing, and a wheel axle passes through the eccentric hole. A roller is mounted at one end of the wheel axle. A sector-shaped disk is provided on the side wall of the piston. The bushing, wheel axle, and sector-shaped disk can rotate synchronously around the axis of the bushing. An arc-shaped groove is formed on the sector-shaped disk, with the axis of the groove being the axis of the bushing. A limit screw is screwed onto the side wall of the piston, with the screw head passing through the arc-shaped groove. When the limit screw is screwed inward toward the piston, the head of the limit screw can press against the side wall of the sector-shaped disk, thereby locking the sector-shaped disk and wheel axle together through friction, preventing the rollers from shifting in height during operation. When leveling is required, all limit screws on the piston need to be loosened, and the height of all rollers on the piston can be adjusted by rotating each wheel axle, allowing for convenient adjustment of the piston roller height.

Description

Technical Field

[0001] This utility model relates to the field of piston devices for large square balers, and more particularly to an adjustable piston roller mechanism for a large square baler. Background Technology

[0002] Balers, as an important component of agricultural machinery, are receiving increasing attention from users. Currently, the technology for small square balers and large round balers in the domestic baler industry is quite mature, leading to fierce market competition. With users' increasing demands for operational efficiency and bale quality, large square balers will become the mainstream product in the market.

[0003] The piston, a key moving component of the large square baler, is involved in the compression of the bales. In addition to the power provided by the gearbox, the piston's compression movement also requires the support of the rollers on the piston. Therefore, the piston rollers are vulnerable parts of the large square baler. During production, the leveling of multiple piston rollers is very important. If the adjustment is not proper, it will cause one roller to wear out severely during operation, seriously affecting the service life of the piston roller. However, the existing piston roller height adjustment is relatively difficult and the leveling efficiency is low. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable piston roller mechanism for a large square baler, which allows for convenient adjustment of the piston roller height.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an adjustable piston roller mechanism for a large square baler, including a bushing rotatably mounted on a piston, an eccentric hole opened along the length direction on the bushing, a wheel axle passing through the eccentric hole, a roller installed at one end of the wheel axle, a sector-shaped disk provided on the side wall of the piston, the sector-shaped disk being connected to the outer wall of the bushing, the bushing, the wheel axle and the sector-shaped disk being able to rotate synchronously around the axis of the bushing to facilitate changing the height of the roller; an arc-shaped groove is opened on the sector-shaped disk, the axis of the arc-shaped groove being the axis of the bushing, a limiting screw is screwed on the side wall of the piston, the screw rod of the limiting screw passing through the arc-shaped groove, when the limiting screw is screwed toward the inside of the piston, the head of the limiting screw can squeeze the side wall of the sector-shaped disk to restrict the rotation of the sector-shaped disk.

[0006] Preferably, the bushing and the axle are provided with positioning screws in the radial direction.

[0007] Based on the above technical solution, the beneficial effects of this utility model are: This invention fixes the axle to the piston via an eccentric bushing. When the bushing rotates, the axle's axis does not coincide with the bushing's axis, causing the axle's height to change. This indirectly adjusts the roller's height, achieving roller leveling. Furthermore, by tightening or loosening the limiting screws within the arc-shaped groove, friction locks the sector disc and axle together, preventing height shift of the rollers during operation. For leveling, simply loosen all the limiting screws on the piston, and rotate each axle to adjust the height of all rollers on the piston. After leveling all rollers, tightening the limiting screws fixes the roller positions, ensuring consistent height across all piston rollers. This results in more even force distribution across multiple rollers, reducing damage caused by uneven rollers leading to severe wear on a single roller, and allowing for convenient adjustment of the piston roller height. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a piston; Figure 2 for Figure 1 A magnified view on the right; Figure 3 This is a sectional view (AA) of the roller mechanism.

[0009] The markings in the diagram are: 1. Piston, 2. Sector-shaped disk, 3. Arc groove, 4. Limit screw, 5. Bushing, 6. Axle, 7. Roller, 8. Positioning screw. Detailed Implementation

[0010] Referring to the attached diagram, the specific implementation method is as follows: like Figure 1-3 As shown, an adjustable piston roller mechanism for a large square baler includes a bushing 5 rotatably mounted on a piston 1. An eccentric hole is formed along the length of the bushing 5, and a wheel axle 6 passes through the eccentric hole. Two positioning screws 8 are radially inserted into the bushing 5 and the wheel axle 6. A roller 7 is mounted at one end of the wheel axle 6. A sector-shaped disk 2 is provided on the side wall of the piston 1, and the sector-shaped disk 2 is connected to the outer wall of the bushing 5. The bushing 5, wheel axle 6, and sector-shaped disk 2 can rotate synchronously around the axis of the bushing 5. When the bushing 5 rotates, since the axis of the wheel axle 6 does not coincide with the axis of the bushing 5, the height of the wheel axle 6 will inevitably change, thus indirectly adjusting the height of the roller 7 and achieving leveling of the roller 7.

[0011] like Figure 1-3As shown, an arc-shaped groove 3 is provided on the sector disk 2. The axis of the arc-shaped groove 3 is the axis of the bushing 5. A limit screw 4 is screwed on the side wall of the piston 1. The screw part of the limit screw 4 passes through the arc-shaped groove 3. When the limit screw 4 is screwed into the piston 1, the head of the limit screw 4 can press against the side wall of the sector disk 2. The friction force can lock the sector disk 2 and the wheel axle 6 together, restricting the rotation of the sector disk 2 and preventing the roller 7 from being displaced during operation.

[0012] When leveling is required, simply loosen all the limit screws 4 on the piston 1, and then rotate each axle 6 to adjust the height of all the rollers 7 on the piston 1. After leveling all the rollers 6, tighten the limit screws 4 to fix the position of the rollers 6, ensuring that the height of each roller is consistent, making the force on multiple rollers more even, and reducing the damage caused by uneven rollers causing severe wear on one roller.

Claims

1. An adjustable piston roller mechanism for a large square baler characterized by: The device includes a bushing (5) rotatably mounted on a piston (1). An eccentric hole is provided on the bushing (5) along its length. A wheel axle (6) passes through the eccentric hole. A roller (7) is installed at one end of the wheel axle (6). A sector disk (2) is provided on the side wall of the piston (1). The sector disk (2) is connected to the outer wall of the bushing (5). The bushing (5), wheel axle (6), and sector disk (2) can rotate synchronously around the axis of the bushing (5) to change the height of the roller (7). An arc groove (3) is provided on the sector disk (2). The axis of the arc groove (3) is the axis of the bushing (5). A limit screw (4) is screwed on the side wall of the piston (1). The screw part of the limit screw (4) passes through the arc groove (3). When the limit screw (4) is screwed into the inside of the piston (1), the head of the limit screw (4) can squeeze the side wall of the sector disk (2) to limit the rotation of the sector disk (2).

2. The adjustable piston (1) roller (7) mechanism of a large square baler according to claim 1, characterized in that: Locating screws (8) are provided radially on the bushing (5) and the axle (6).

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