Single cylinder double acting hydraulic tensioner

Abstract

The utility model discloses a single cylinder double -action hydraulic tensioner, include: oil cylinder, oil cylinder is connected with hydraulic pump, main support, main support is fixedly connected with the piston rod of oil cylinder, vice support, vice support is hinged with main support through pull rod setting, first tensioning wheel, first tensioning wheel is installed on main support, second tensioning wheel, second tensioning wheel is installed on vice support, oil cylinder is set to single cylinder double -action structure, and main support and vice support linkage are driven through piston rod telescopic synchronous. The utility model solves traditional double tensioning oil cylinder complex structure, high in cost, and occupies the problem such as big space, has simple structure, low in cost, occupies small, power transmission efficient and stable etc. advantage, is applicable to the power transmission system of ensiling machinery and other agricultural machinery.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology. Specifically, this utility model relates to a single-cylinder double-acting hydraulic tensioning device. Background Technology

[0002] In modern agricultural production, silage serves as an important foundation for ensuring the stable development of animal husbandry. Its efficient preparation is of great significance for improving breeding efficiency and ensuring feed supply. As the core equipment for silage preparation, silage machinery needs to transmit power accurately and stably to key parts such as the baling and harvesting sections during operation to ensure the smooth operation of a series of operations such as baling and harvesting.

[0003] Traditional silage machinery power transmission systems often employ a dual-tensioning cylinder design. However, this dual-cylinder tensioning system has several drawbacks. On the one hand, its complex structure, containing numerous components, significantly increases initial equipment manufacturing and procurement costs. Furthermore, subsequent maintenance tasks, such as calibrating the synchronization of the two cylinders and troubleshooting the hydraulic circuits, are difficult and costly. On the other hand, the addition of a cylinder to the dual-cylinder tensioning device necessitates more complex hydraulic circuits and control components to achieve coordinated operation between the two cylinders, leading to increased structural complexity, larger space requirements, and more stringent requirements for the overall layout and design of the equipment. Utility Model Content

[0004] This invention provides a single-cylinder double-acting hydraulic tensioning device, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a single-cylinder double-acting hydraulic tensioning device, comprising: a hydraulic cylinder connected to a hydraulic pump; a main support fixedly connected to the piston rod of the hydraulic cylinder; a secondary support hinged to the main support via a tie rod; a first tensioning wheel mounted on the main support; and a second tensioning wheel mounted on the secondary support; wherein the hydraulic cylinder is configured as a single-cylinder double-acting structure, and the piston rod synchronously drives the main support and the secondary support to move together.

[0006] Preferably, it further includes a drive wheel, a pulley a connected to the drive wheel via a drive belt a, and a pulley b connected to the drive wheel via a drive belt b. The first tension wheel is disposed in contact with the drive belt a, and the second tension wheel is disposed in contact with the drive belt b.

[0007] Preferably, the tie rod is configured as a rigid connecting rod, with its two ends hinged to the main support and the secondary support respectively, for transmitting the linear displacement of the main support to the secondary support proportionally.

[0008] Preferably, the displacement ratio between the main support and the secondary support is set to 1:1.

[0009] The beneficial effects of adopting the above technical solutions are:

[0010] I. This device adopts a single-cylinder design, which is simpler in structure and reduces the number of components compared to the traditional double-tensioning cylinder design. This not only reduces the initial equipment manufacturing and procurement costs, but also allows for more efficient maintenance in the later stages, as only the operating status of a single cylinder needs to be monitored. This reduces maintenance items and difficulty, thereby significantly lowering maintenance costs.

[0011] Second, the tensioning function is achieved by using a single hydraulic cylinder in conjunction with related components, which occupies less space. This is more conducive to the overall layout and design of silage machinery with strict limitations on equipment size, and improves the space utilization rate of the equipment.

[0012] Third, through the linkage design of the bracket and the tie rod, the two tensioning wheels can move synchronously to form a dual-point synergistic tensioning effect. This design ensures that the transmission belt maintains a uniform and stable tension from pulley a to pulley b and along the entire power transmission path, effectively avoiding slippage, significantly improving the efficiency and stability of power transmission, and ensuring the smooth operation of silage machinery. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure provided by this utility model;

[0014] in:

[0015] 1. First tensioning pulley; 2. Second tensioning pulley; 3. Pulley a; 4. Pulley b; 5. Hydraulic cylinder; 6. Main support; 7. Tie rod; 8. Secondary support; 9. Transmission wheel. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0017] Specifically, such as Figure 1 As shown, a single-cylinder double-acting hydraulic tensioning device includes: a hydraulic cylinder 5 connected to a hydraulic pump; a main support 6 fixedly connected to the piston rod of the hydraulic cylinder 5; a secondary support 8 hinged to the main support 6 via a pull rod 7; a first tensioning wheel 1 mounted on the main support 6; and a second tensioning wheel 2 mounted on the secondary support 8. The hydraulic cylinder 5 is configured as a single-cylinder double-acting structure, synchronously driving the main support 6 and the secondary support 8 through the extension and retraction of the piston rod.

[0018] It should be noted that when the silage machinery starts up, the high-pressure oil output by the hydraulic pump enters the oil cylinder 5, pushes the piston to extend, and transmits the linear motion of the piston to the support 6, causing the support 6 to start moving. At the same time as the support 6 moves, the support 8 moves together through the pull rod 7, thereby ensuring that the tension wheel 1 and the tension wheel 2 move synchronously.

[0019] In detail, the hydraulic cylinder 5, as the power source, is connected to the hydraulic pump and adopts a single-cylinder double-acting structure. Through the pressure oil supplied by the hydraulic pump, the piston rod of the hydraulic cylinder 5 can achieve telescopic movement, thus providing power support for the entire device. The main support 6 directly receives the power from the piston rod of the hydraulic cylinder and produces corresponding displacement as the piston rod telescopically extends and retracts. When the main support 6 moves, the auxiliary support 8 can be linked with the main support 6 under the action of the tie rod 7 to jointly complete the position adjustment of the tension wheel.

[0020] It also includes a drive wheel 9, a pulley a3 connected to the drive wheel 9 via a drive belt a, and a pulley b4 connected to the drive wheel 9 via a drive belt b. The first tension wheel 1 is disposed in contact with the drive belt a, and the second tension wheel 2 is disposed in contact with the drive belt b.

[0021] It should be noted that tensioning wheel 1 precisely applies tension to the transmission belt area a of pulley a3, and its wheel surface is in close contact with the transmission belt. As the bracket 6 moves, the pressure on the transmission belt in this area gradually increases, so that the transmission belt maintains an appropriate tension near pulley 3. Tensioning wheel 2 is responsible for tensioning the transmission belt area near pulley b4. Driven by the tie rod 7 and the bracket 8, it applies pressure to the transmission belt area near pulley 4.

[0022] The synchronized action of the two tensioning pulleys creates a dual-point synergistic tensioning effect, ensuring that the transmission belt maintains a uniform and stable tension along the entire power transmission path, from pulley a3 to pulley b4 and all intermediate parts. This state allows sufficient friction between the transmission belt and the pulleys to prevent slippage, efficiently transmitting power from the engine and other power sources to the two target pulleys, thus improving the overall working efficiency and stability of the machine.

[0023] The tie rod 7 is configured as a rigid connecting rod, with its two ends hinged to the main support 6 and the secondary support 8 respectively, and is used to proportionally transfer the linear displacement of the main support 6 to the secondary support 8.

[0024] The displacement ratio between the main support 6 and the auxiliary support 8 is set to 1:1.

[0025] It should be noted that the 1:1 displacement ratio between the main support 6 and the auxiliary support 8 ensures uniform distribution of tension force; the hinged design of the tie rod 7 eliminates motion interference.

[0026] The specific working method is described below using specific embodiments: Example 1

[0027] When the silage machinery is operating normally, the hydraulic pump starts working, outputting high-pressure oil to cylinder 5. The high-pressure oil pushes the piston inside cylinder 5 to extend, and the linear motion of the piston is transmitted to the main support 6 through the piston rod, causing the main support 6 to begin moving away from the cylinder. Since the main support 6 and the auxiliary support 8 are hinged by a rigid tie rod 7, and the displacement ratio of the main support 6 and the auxiliary support 8 is 1:1, the movement of the main support 6 drives the auxiliary support 8 to move synchronously through the tie rod 7. The first tensioning pulley 1 installed on the main support 6 gradually increases the tension on the transmission belt a as the main support 6 moves. The pressure maintains the appropriate tension of the transmission belt a near pulley a3. Similarly, the second tensioning pulley 2, mounted on the auxiliary support 8, applies pressure to the area of ​​the transmission belt b near pulley b4 under the drive of the auxiliary support 8, maintaining the transmission belt b in a suitable tension state. The synchronous action of the two tensioning pulleys ensures uniform tension of the transmission belt throughout the entire power transmission path. The power transmitted from the power source to pulleys a3 and b4 via the transmission pulley 9 can be transmitted stably, avoiding transmission belt slippage and ensuring the stability and efficiency of silage machinery operation. Example 2

[0028] During silage machinery operation, if the transmission belt a or transmission belt b becomes loose due to prolonged operation or other reasons, the hydraulic pump will output high-pressure oil to the cylinder 5 again based on the preset pressure or sensor feedback information, causing the piston rod of the cylinder 5 to extend further. Under the action of the piston rod and the pull rod 7, the main support 6 and the auxiliary support 8 continue to move away from the cylinder. The first tensioning wheel 1 and the second tensioning wheel 2 apply greater tension to the transmission belt a and transmission belt b respectively, readjusting the tension of the transmission belt to ensure the stability of power transmission. When the transmission belt returns to the appropriate tension, the hydraulic pump stops supplying oil, and the cylinder 5 maintains the current piston rod position to maintain the tension of the transmission belt.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A single-cylinder double-acting hydraulic tensioning device, characterized in that, include: Oil cylinder (5), which is connected to a hydraulic pump; The main support (6) is fixedly connected to the piston rod of the oil cylinder (5); Sub-support (8), which is hinged to the main support (6) via a tie rod (7); The first tensioning wheel (1) is mounted on the main support (6); The second tensioning wheel (2) is mounted on the auxiliary bracket (8); The oil cylinder (5) is configured as a single-cylinder double-acting structure, and the main support (6) and the auxiliary support (8) are driven to move in linkage through the extension and retraction of the piston rod.

2. The single-cylinder double-acting hydraulic tensioning device according to claim 1, characterized in that: It also includes a drive wheel (9), a pulley a (3) that is connected to the drive wheel (9) via a drive belt a, and a pulley b (4) that is connected to the drive wheel (9) via a drive belt b. The first tension wheel (1) is arranged to abut against the drive belt a, and the second tension wheel (2) is arranged to abut against the drive belt b.

3. The single-cylinder double-acting hydraulic tensioning device according to claim 1, characterized in that: The tie rod (7) is configured as a rigid connecting rod, with its two ends hinged to the main support (6) and the secondary support (8) respectively, and is used to proportionally transfer the linear displacement of the main support (6) to the secondary support (8).

4. The single-cylinder double-acting hydraulic tensioning device according to claim 3, characterized in that: The displacement ratio of the main support (6) to the secondary support (8) is set to 1:1.

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