An adjustable eccentric tension sprocket transmission mechanism

Abstract

This utility model discloses an adjustable eccentric tensioning sprocket transmission mechanism, relating to the field of agricultural machinery technology. It aims to solve the problems of insufficient power, inconvenient adjustment, and easy breakage in existing long chain transmission layouts. The mechanism includes a frame, a transmission assembly, and an adjustable eccentric tensioning mechanism. The adjustable eccentric tensioning mechanism includes a mounting plate fixed to the frame, an eccentric inner sleeve rotatably mounted on the mounting plate with its inner and outer circular axes eccentrically aligned, and a tensioning sprocket that can freely rotate around the eccentric inner sleeve. This utility model optimizes a single long chain into two independent chains and utilizes the rotating eccentric inner sleeve to synchronously adjust the tension of the two chains. The structure is compact, the adjustment is convenient, it ensures sufficient transmission power, improves working efficiency, and effectively reduces the risk of chain breakage and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to an adjustable eccentric tensioning sprocket transmission mechanism. Background Technology

[0002] In the field of agricultural machinery technology, chain drives are widely used due to their advantages such as reliable transmission and simple structure. However, in some specific transmission layouts, existing technical solutions still have obvious shortcomings. For example, in some cleaning mechanisms, the original transmission layout uses a single extra-long chain to connect the fruit and vegetable cage and the waste auger. The drawback of this design is that the chain span is too long, and after wear, it is prone to sagging and scraping against bearings and other components; moreover, when relying on a single nylon wheel for tensioning, its adjustment space and tension force are very limited; more importantly, the excessively long chain does not transmit enough torque when under load, which can easily lead to unclean cleaning results, and the chain itself is also prone to breakage due to poor stress distribution, increasing maintenance costs.

[0003] Therefore, this application provides an adjustable eccentric tension sprocket drive mechanism to meet the requirements. Utility Model Content

[0004] The purpose of this application is to provide an adjustable eccentric tension sprocket transmission mechanism, which aims to solve the problems of insufficient power, inconvenient adjustment, and easy breakage in the existing long chain transmission layout.

[0005] To achieve the above objectives, this application provides the following technical solution: an adjustable eccentric tensioning sprocket transmission mechanism, comprising a transmission component and a tensioning component, wherein both the transmission component and the tensioning component are mounted on a frame; The transmission assembly includes a fruit and vegetable cage sprocket, a waste auger sprocket, and a chain. The fruit and vegetable cage sprocket and the waste auger sprocket are connected to the tensioning assembly via the chain. The tensioning assembly includes a mounting plate, an eccentric inner sleeve, and a tensioning sprocket; The mounting plate is fixed to the frame; The eccentric inner sleeve is rotatably mounted on the mounting plate, and its inner hole axis is eccentric to its outer circumferential surface axis. The tension sprocket can rotate freely around the outer circumference of the eccentric inner sleeve. Through the cooperation between the above components, the problems of cumbersome adjustment and unstable transmission in the prior art are solved, making the structure more compact, the adjustment more convenient, and the transmission more reliable.

[0006] Preferably, the chain includes a first transmission chain and a second transmission chain; the tensioning sprocket of the tensioning assembly is an integrated double sprocket structure, which is connected to the fruit and vegetable cage sprocket through the first transmission chain and to the miscellaneous auger sprocket through the second transmission chain, so as to facilitate synchronous and balanced tension adjustment of the two circuits.

[0007] Preferably, the frame is further provided with a set of tensioning wheels for adjusting the chain, which further enhances the adjustment accuracy and long-term operational stability of the entire transmission system.

[0008] Preferably, the tensioning assembly further includes a set of locking devices for locking and limiting the eccentric inner sleeve at any adjustment angle, ensuring that the tensioned state after adjustment can be firmly positioned, and avoiding loosening and failure caused by vibration during equipment operation.

[0009] Preferably, the locking device includes a fastening bolt that passes through the inner hole of the eccentric inner sleeve and is threadedly connected to the mounting plate. The structure is simple, the locking is reliable, and it is easy to operate using conventional tools.

[0010] Preferably, the tensioning sprocket is mounted on the outer circumferential surface of the eccentric inner sleeve via a bearing, which effectively reduces rotational friction, improves transmission efficiency, and extends the service life of the component.

[0011] Preferably, the eccentric inner sleeve is further provided with an inner hole retaining ring for axially limiting the bearing.

[0012] In summary, the technical effects and advantages of this utility model are as follows: In this invention, an integrated tensioning component is used as the intermediate lifting wheel system, which optimizes the original single extra-long chain into two independent transmission chains with more reasonable lengths. This new transmission layout ensures that the two chains still have sufficient power during long-term operation, thereby significantly improving the working effect of the cleaning mechanism. Furthermore, because the chain is subjected to more reasonable force, it is less prone to breakage, effectively reducing maintenance costs.

[0013] This invention provides a compact and convenient solution by setting a tensioning component. During operation, one chain can be easily tensioned by simply rotating the eccentric inner sleeve in the mechanism. With the adjustment of the tensioning wheel, the tensioning maintenance of the entire system can be easily completed. This integrated design completely solves the interference problem caused by chain sagging in the original solution and makes the adjustment process simpler and more efficient. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is an enlarged view of point A in this utility model; Figure 3 This is a front view of the tensioning component of this utility model; Figure 4 This is a schematic diagram of the CC cross-section of the tensioning component of this utility model; Figure 5 This is a schematic diagram of the DD cross-section of the tensioning component of this utility model; Figure 6 This is a perspective view of part of the tensioning component of this utility model; Figure 7 This is an enlarged structural diagram of the mounting plate of this utility model.

[0016] In the diagram: 1. Frame; 2. Fruit and vegetable cage sprocket; 3. Tensioner wheel; 4. Miscellaneous auger sprocket; 5. Chain; 6. Tensioning assembly; 51. First transmission chain; 52. Second transmission chain; 61. Mounting plate; 62. Threaded hole; 63. Eccentric inner sleeve; 64. Bearing; 65. Tensioner sprocket; 66. Fastening bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] refer to Figure 1-7 The adjustable eccentric tensioning sprocket transmission mechanism shown here, by mounting both the transmission component and the tensioning component 6 on the frame 1, and utilizing the core eccentric structure of the tensioning component 6, enables synchronous tension adjustment of two independent chain loops through a single operation. This scheme is structurally integrated, convenient to adjust, and effectively solves the problems of cumbersome adjustment and poor effect of traditional tensioning methods. The frame 1 serves as the installation foundation for the entire device.

[0019] In one embodiment of this invention, the transmission assembly includes a fruit and vegetable cage sprocket 2 for driving the fruit and vegetable cage, a waste auger sprocket 4 for driving the waste auger, and a chain 5 for transmitting power. The fruit and vegetable cage sprocket 2 and the waste auger sprocket 4 are connected to the tensioning assembly 6 via the chain 5, forming two independent transmission circuits.

[0020] As one embodiment of this invention, the internal structure of the tensioning assembly 6 is as follows: The assembly 6 includes a mounting plate 61 fixed to the frame 1 by welding or other means, the mounting plate 61 having a through hole for mounting an eccentric inner sleeve; an eccentric inner sleeve 63 rotatably mounted in the through hole, the axis of its inner hole being parallel to and not coincident with the axis of its outer circumferential surface; and a tensioning sprocket 65 that can freely rotate around the outer circumferential surface of the eccentric inner sleeve 63.

[0021] In one embodiment of this invention, the chain 5 is specifically divided into a first transmission chain 51 and a second transmission chain 52. The tensioning sprocket 65 of the tensioning assembly 6 is preferably an integrated double sprocket structure, with one side connected to the fruit and vegetable cage sprocket 2 via the first transmission chain 51, and the other side connected to the waste auger sprocket 4 via the second transmission chain 52.

[0022] As one implementation method in this embodiment, a tensioning wheel 3 is additionally provided on the frame 1 for more precise adjustment of the transmission system. The tensioning wheel 3 is preferably located above the first transmission chain 51, and can assist in adjusting the tension of the first transmission chain 51 by sliding vertically on the frame 1, forming a primary and secondary cooperation with the tensioning component 6, so that the transmission system can still maintain its optimal state after long-term operation.

[0023] As one embodiment of this work, in order to reliably fix the tensioned state after adjustment, the tensioning assembly 6 is also provided with a locking device. Specifically, the locking device is a fastening bolt 66, which passes through the inner hole of the eccentric inner sleeve 63 and is threaded into the mounting plate 61. By tightening the fastening bolt 66, its axial force can be used to press the end face of the eccentric inner sleeve 63 against the mounting plate 61, thereby securing it firmly at any adjustment angle through friction.

[0024] In one embodiment of this work, to ensure smooth rotation, the tension sprocket 65 is mounted on the outer circumferential surface of the eccentric inner sleeve 63 via a bearing 64. Similarly, other rotating components, such as the tension wheel 3, are also connected to the frame via bearings to reduce friction and improve transmission efficiency.

[0025] As a further optimization in this embodiment, to ensure that the bearing 64 will not axially move or dislodge from the eccentric inner sleeve 63 after installation, the eccentric inner sleeve 63 is also provided with an inner hole retaining ring for axially limiting the bearing 64. This inner hole retaining ring is installed in a groove on the inner wall of the eccentric inner sleeve 63. Its structure is simple and reliable, and it can effectively fix the bearing with minimal space occupation, further improving the assembly stability and long-term operational reliability of the entire tensioning assembly 6.

[0026] The working principle of this practical system is as follows: First, use a tool to loosen the fastening bolt 66, releasing its clamping force on the eccentric inner sleeve 63, allowing the eccentric inner sleeve 63 to rotate freely within the mounting plate 61. Second, use a tool such as calipers or a wrench to grip the end of the eccentric inner sleeve 63 and rotate it. Due to the eccentric setting of its inner hole axis and outer circumferential surface axis, its rotation will cause radial displacement of its outer circumferential surface, thereby driving the tension sprocket 65 fitted on it to move as a whole. This movement will simultaneously tighten the first transmission chain 51 and the second transmission chain 52. When the tension of the two chains is adjusted to be appropriate, stop rotating the eccentric inner sleeve 63 and retighten the fastening bolt 66 to lock the entire mechanism in the optimal tension state. The entire process is simple to operate, precise to adjust, convenient and quick.

[0027] The electromechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments; they are common knowledge.

[0028] Components not described in detail in this article are existing technologies.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An adjustable eccentric tension sprocket drive mechanism characterized by: It includes a transmission assembly and a tensioning assembly (6), both of which are mounted on a frame (1); The transmission assembly includes a fruit and vegetable cage sprocket (2), a waste auger sprocket (4), and a chain (5). The fruit and vegetable cage sprocket (2) and the waste auger sprocket (4) are connected to the tensioning assembly (6) via the chain (5). The tensioning assembly (6) includes a mounting plate (61), an eccentric inner sleeve (63), and a tensioning sprocket (65). The mounting plate (61) is fixed on the frame (1); The eccentric inner sleeve (63) is rotatably mounted on the mounting plate (61), and its inner hole axis is eccentric to its outer circumferential surface axis; The tension sprocket (65) can rotate freely around the outer circumference of the eccentric inner sleeve (63).

2. A variable eccentric sprocket drive mechanism according to claim 1 wherein: The chain (5) includes a first transmission chain (51) and a second transmission chain (52); the tensioning sprocket (65) of the tensioning assembly (6) is an integrated double sprocket structure, which is connected to the fruit and vegetable cage sprocket (2) through the first transmission chain (51) and to the waste auger sprocket (4) through the second transmission chain (52).

3. A variable eccentric sprocket drive mechanism according to claim 2, wherein: The frame (1) is also provided with a set of tensioning wheels (3) for adjusting the chain (5).

4. A variable eccentric sprocket drive mechanism as claimed in claim 1, wherein: The tensioning assembly (6) also includes a set of locking devices for locking and limiting the eccentric inner sleeve (63) at any adjustable angle.

5. An adjustable off-center sprocket tensioner mechanism according to claim 4, wherein: The locking device includes a fastening bolt (66) that passes through the inner hole of the eccentric inner sleeve (63) and is threadedly connected to the mounting plate (61).

6. A variable eccentric sprocket drive mechanism as claimed in claim 1, wherein: The tension sprocket (65) is mounted on the outer circumferential surface of the eccentric inner sleeve (63) via a bearing (64).

7. An adjustable off-center sprocket tensioner mechanism as set forth in claim 6, wherein: The eccentric inner sleeve (63) is also provided with an inner hole retaining ring for axially limiting the bearing (64).

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