Transmission mechanism and agricultural machine

Abstract

The utility model belongs to the technical field of operation machinery, and particularly relates to a transmission mechanism and an agricultural machine. The transmission gear is axially provided with a mounting hole in a penetrating manner, the transmission shaft can be inserted into the mounting hole, the transmission gear comprises a first connecting section and a second connecting section which are sequentially connected in the axial direction, and the first connecting section sleeves the transmission shaft and is in driving connection with the transmission shaft; the adjusting cover is inserted into the second connecting section, and the axial position of the adjusting cover in the second connecting section can be adjusted; the fastening assembly is sequentially connected with the adjusting cover and the transmission shaft in a penetrating mode and locks the transmission shaft and the adjusting cover, and when the fastening assembly is detached, the axial position of the adjusting cover relative to the second connecting section is adjusted, and the axial position of the transmission gear relative to the transmission shaft is adjusted so that the transmission shaft can abut against the adjusting cover. By the adoption of the transmission mechanism, the axial position of the transmission gear can be adjusted in a simpler mode, and the adjusting efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to a transmission mechanism and agricultural machinery. Background Technology

[0002] Agricultural machinery typically contains many gear transmission components. As precision transmission components, gears need to maintain a high degree of coplanarity during meshing and transmission; otherwise, problems such as poor contact, accelerated wear, high transmission noise, and low transmission efficiency will occur.

[0003] When adjusting the coplanarity of two meshing gears, the gears are usually removed from the drive shaft, and then shims of a specific thickness are added to adjust the coplanarity of the two gears. However, this adjustment method requires the use of washers with specific inner diameters and thicknesses.

[0004] Existing technologies include structures that adjust the axial position of gears through complex transmission mechanisms. However, these structures occupy a large space and are costly, and are typically used to adjust the position of large sprocket gears. They are not suitable for adjusting the coplanarity of two meshing small transmission gears. Utility Model Content

[0005] The purpose of this application is to provide a transmission mechanism and agricultural machinery that achieves adjustment of the axial position of the transmission gears with a simpler and more compact mechanism.

[0006] To achieve the above objectives, this application provides a transmission mechanism, which includes:

[0007] transmission shaft;

[0008] The transmission gear has a mounting hole through which the transmission shaft is inserted along the axial direction. The transmission gear includes a first connecting section and a second connecting section connected in sequence along the axial direction. The first connecting section is sleeved on the transmission shaft and drivenly connected to the transmission shaft.

[0009] An adjusting cover is inserted into the second connecting section, and the axial position of the adjusting cover in the second connecting section is adjustable.

[0010] The fastening assembly is sequentially connected to the adjusting cover and the drive shaft, and the drive shaft and the adjusting cover are locked together. When the fastening assembly is removed, the axial position of the adjusting cover relative to the second connecting section is adjusted, and the axial position of the drive gear relative to the drive shaft is adjusted so that the drive shaft and the adjusting cover abut together.

[0011] In some embodiments, the outer periphery of the adjusting cover is threaded to the inner wall of the second connecting section, the inner diameter of the second connecting section being larger than the outer diameter of the drive shaft.

[0012] In some embodiments, the drive shaft has a threaded hole at one end facing the adjustment cover, and the adjustment cover also has multiple through holes along the axial direction, through which the fastening assembly passes in sequence.

[0013] In some embodiments, multiple through holes are evenly spaced along the circumference of the adjustment cover and are arranged symmetrically about the center of the adjustment cover.

[0014] In some embodiments, the transmission mechanism further includes an adjustment assembly that can pass through any two through holes and is used to apply a rotational driving force to the adjustment cover to drive the adjustment cover to rotate relative to the thread of the second connecting section.

[0015] In some embodiments, the drive shaft has a threaded hole at one end facing the adjustment cover, and the adjustment cover also has multiple through holes along the axial direction. The multiple through holes include a central through hole and circumferential through holes symmetrically arranged along the central through hole. The fastening components pass through the central through hole and the threaded hole in sequence.

[0016] In some embodiments, there are two circumferential through holes, and the two circumferential through holes are symmetrically distributed with respect to the central through hole.

[0017] In some embodiments, the end of the drive shaft has an external spline, and the first connecting section has an internal spline, with the internal spline fitted onto the external spline.

[0018] In some embodiments, the end of the drive shaft and the inner wall of the first connecting section are provided with flat keyways, and the drive shaft also includes a flat key, which is received in a closed space formed by two flat keyways.

[0019] A second aspect of this application provides an agricultural machine, including the aforementioned transmission mechanism.

[0020] The above-described technical solution includes a transmission mechanism comprising a transmission shaft, a transmission gear, an adjusting cover, and a fastening assembly. The transmission shaft transmits external torque. The transmission gear has an axially extending mounting hole for insertion into the transmission shaft. The transmission gear includes a first connecting section and a second connecting section connected sequentially along the axial direction. The first connecting section is fitted onto the transmission shaft and receives the torque output by the transmission shaft. The adjusting cover is inserted into the second connecting section, and its axial position within the second connecting section is adjustable. The fastening assembly connects the adjusting cover and the transmission shaft in series, ensuring that the adjusting cover and the end of the transmission shaft remain in contact. When the fastening assembly is removed, the axial position of the adjusting cover relative to the second connecting section is adjusted first, followed by the axial position of the transmission gear relative to the transmission shaft, so that the transmission shaft and the adjusting cover abut. Finally, the fastening assembly is re-locked to secure the transmission shaft and the adjusting cover, thus locking the transmission gear in its new position on the transmission shaft and achieving position adjustment of the transmission gear. Using this transmission mechanism, the axial position of the transmission gear on the transmission shaft is adjustable without removing the transmission gear, simplifying the adjustment steps and improving adjustment efficiency.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0023] Figure 1 This is a schematic diagram of the transmission mechanism provided according to the first embodiment of this application;

[0024] Figure 2 This is an exploded view of the transmission mechanism provided according to the first embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the transmission shaft structure provided according to the first embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the transmission gear provided according to the first embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the adjustment cover structure provided according to the first embodiment of this application;

[0028] Figure 6 This is a cross-sectional view of the transmission gear provided according to the first embodiment of this application in a first relative position;

[0029] Figure 7 This is a cross-sectional view of the transmission gear provided according to the first embodiment of this application in a second relative position;

[0030] Figure 8 This is a schematic diagram of the transmission shaft structure provided according to the second embodiment of this application;

[0031] Figure 9 This is a schematic diagram of the adjustment cover structure provided according to the second embodiment of this application.

[0032] Explanation of reference numerals in the attached figures

[0033] 100 Transmission Mechanism

[0034] 10 Drive shaft

[0035] 11 Threaded hole

[0036] 12 external splines

[0037] 20 Transmission Gears

[0038] 21 First connecting segment

[0039] 22 Second connecting section

[0040] 23 Internal splines

[0041] 30 Adjustment cover

[0042] 31 Through hole

[0043] 311 Center Through Hole

[0044] 312 Circumferential Through Hole

[0045] 40 Fastening components Detailed Implementation

[0046] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0047] The transmission mechanism 100 and agricultural machinery according to this application are described below with reference to the accompanying drawings.

[0048] like Figure 1 The diagram shown is a structural schematic of the transmission mechanism 100 provided according to the first embodiment of this application; as shown... Figure 2 As shown, this is an exploded view of the transmission mechanism 100 provided according to the first embodiment of this application; as Figure 3 The diagram shown is a schematic representation of the drive shaft 10 according to the first embodiment of this application; as shown Figure 4The diagram shown is a structural schematic of the transmission gear 20 provided according to the first embodiment of this application; as shown... Figure 5 The diagram shown is a schematic representation of the adjustment cover 30 structure according to the first embodiment of this application; as shown Figure 6 The image shown is a cross-sectional view of the transmission gear 20 provided according to the first embodiment of this application at a first relative position; as shown... Figure 7 The image shown is a cross-sectional view of the transmission gear 20 provided according to the first embodiment of this application at a second relative position. The transmission mechanism 100 provided in this embodiment includes:

[0049] Drive shaft 10;

[0050] The transmission gear 20 has a mounting hole through which the transmission shaft 10 is inserted along the axial direction. The transmission gear 20 includes a first connecting section 21 and a second connecting section 22 connected in axial sequence. The first connecting section 21 is sleeved on the transmission shaft 10 and is drivenly connected to the transmission shaft 10.

[0051] An adjusting cover 30 is inserted into the second connecting section 22, and the axial position of the adjusting cover 30 in the second connecting section 22 is adjustable.

[0052] The fastening assembly 40 passes through the adjusting cover 30 and the drive shaft 10 in sequence and locks the drive shaft 10 and the adjusting cover 30. When the fastening assembly 40 is removed, the axial position of the adjusting cover 30 relative to the second connecting section 22 is adjusted, and the axial position of the drive gear 20 relative to the drive shaft 10 is adjusted so that the drive shaft 10 and the adjusting cover 30 abut.

[0053] When two gears transmit torque, they need to meet certain coplanarity requirements to ensure smoother torque transmission. However, when there are errors in the structural design, it is often necessary to adjust the axial position of the gears to ensure coplanarity. Current technology typically involves machining corresponding shims based on the error value to adjust the gear position. However, this structural approach requires disassembling the gears and calculating the machining error, making adjustments cumbersome and requiring additional machining steps.

[0054] The transmission mechanism 100 provided in this embodiment includes a transmission shaft 10, a transmission gear 20, an adjusting cover 30, and a fastening assembly 40. The transmission shaft 10 has a columnar structure with a smooth outer wall. One end of the transmission shaft 10 can be connected to an external power source to receive and transmit power. The first connecting section 21 of the transmission gear 20 is sleeved on the other end of the transmission shaft 10 and is drivenly connected to the transmission shaft 10. The transmission shaft 10 can transmit driving torque to the transmission gear 20, and the axial position of the transmission gear 20 on the transmission shaft 10 is adjustable. The second connecting section 22 of the transmission gear 20 is used to cooperate with the adjusting cover 30. The adjusting cover 30 is inserted into the second connecting section 22, and the axial position of the adjusting cover 30 in the second connecting section 22 is adjustable. When it is necessary to adjust the axial position of the transmission gear 20, the fastening assembly 40 is first removed, so that the adjusting cover 30 and the transmission shaft 10 are no longer locked, thereby changing the axial position of the adjusting cover 30 in the second connecting section 22. Subsequently, the axial position of the transmission gear 20 is adjusted. Since the adjusting cover 30 cooperates with the second connecting section 22 of the transmission gear 20, the movement of the transmission gear 20 will cause the adjusting cover 30 to move axially together. When the transmission gear 20 moves to the point where it abuts against the transmission shaft 10 and the adjusting cover 30, the fastening assembly 40 is reconnected to the adjusting cover 30 and the transmission shaft 10 and locked, thereby fixing the new position of the transmission gear 20 on the transmission shaft 10. The axial adjustment distance of the adjusting cover 30 is the same as the axial adjustment distance required for the transmission gear 20 to achieve coplanarity. In a specific embodiment, the fastening assembly 40 includes bolts and washers.

[0055] Specifically, such as Figure 6 and Figure 7 As shown, the position of the drive shaft 10 remains fixed, and the adjusting cover 30 and the drive shaft 10 remain in contact before and after adjustment. When the position of the adjusting cover 30 in the transmission gear 20 changes from... Figure 6 The position in the middle is adjusted to Figure 7 When the gear 20 is in the correct position, its axial position changes. Furthermore, after adjustment, the adjusting cover 30 and the drive shaft 10 are still locked by the fastening assembly 40, ensuring the gear 20 remains stable in the adjusted position.

[0056] By employing the aforementioned transmission mechanism 100, the axial position of the transmission gear 20 can be adjusted without removing it, simply by adjusting the axial position of the adjusting cover 30 in the second connecting section 22. This simplifies the adjustment process and improves efficiency. Furthermore, after the position adjustment is completed, the fastening assembly 40 can re-lock the adjusting cover 30 and the transmission shaft 10, enhancing the stability of the adjustment.

[0057] In one embodiment, such as Figure 1-7As shown, the outer periphery of the adjusting cover 30 is threadedly connected to the inner wall of the second connecting section 22, and the inner diameter of the second connecting section 22 is larger than the outer diameter of the drive shaft 10. The outer periphery of the adjusting cover 30 has external threads (not shown in the figure), and the inner wall of the second connecting section 22 has internal threads (not shown in the figure). The external and internal threads cooperate to achieve a threaded connection. By rotating the adjusting cover 30, the axial position of the adjusting cover 30 in the inner wall of the second connecting section 22 can be changed. Since the adjusted cover 30 abuts against the end of the drive shaft 10 after being locked, when the adjusting cover 30 is in such a position... Figure 7 In the position shown, the end of the drive shaft 10 is inserted into the second connecting section 22, so that the axial position of the drive gear 20 can be adjusted to a greater extent. In the above structure, the threaded connection between the adjusting cover 30 and the second connecting section 22 not only provides a stable axial adjustment capability, but also ensures that the adjusted position can be firmly locked and is not easily displaced by vibration or external force.

[0058] In one embodiment, such as Figure 3 , 5 As shown in Figures 6 and 7, the drive shaft 10 has a threaded hole 11 at one end facing the adjusting cover 30. The adjusting cover 30 also has multiple through holes 31 along the axial direction. The fastening assembly 40 passes through one of the through holes 31 and the threaded hole 11 in sequence. The fastening assembly 40 can be a bolt. The bolt passes through one of the through holes 31 of the adjusting cover 30 and is inserted into the threaded hole 11 of the drive shaft 10, which can lock the adjusting cover 30 and the drive shaft 10. When it is necessary to unlock the adjusting cover 30 and the drive shaft 10, the bolt can be rotated to unscrew it from the threaded hole 11, thereby releasing the locking state of the adjusting cover 30 and the drive shaft 10. This locking method is simple, reliable, and easy to operate, and can ensure that the relative position between the adjusting cover 30 and the drive shaft 10 does not change during the adjustment process. In addition, providing multiple through holes 31 allows for more precise adjustment of the position of the adjusting cover 30.

[0059] In one embodiment, such as Figure 5 As shown, multiple through holes 31 are evenly spaced along the circumference of the adjusting cover 30 and symmetrically arranged around the center of the adjusting cover 30. The fastening assembly 40 requires sequentially passing through the through holes 31 and the threaded hole 11. The adjusting cover 30 is adjusted by rotation. The multiple through holes 31 symmetrically arranged around the center of the adjusting cover 30 ensure a fixed unit adjustment distance, facilitating fine-tuning. Specifically, as... Figure 5As shown, the adjusting cover 30 has four through holes 31 symmetrically arranged around its center. When adjusting the adjusting cover 30, each adjustment can be made by rotating it in multiples of 90 degrees to align the through holes 31 with the threaded holes 11. Using the aforementioned adjusting cover 30 allows for precise adjustment of its position, and due to the number and arrangement of the through holes 31, the adjustment process offers greater flexibility and convenience. When adjusting the axial position of the transmission gear 20, the required rotation angle of the adjusting cover 30 can be determined based on the desired adjustment distance. Then, by rotating the adjusting cover 30 to the corresponding position, the axial position of the transmission gear 20 can be adjusted. This adjustment method not only simplifies the adjustment steps but also improves the accuracy and efficiency of the adjustment.

[0060] In one embodiment, the transmission mechanism 100 further includes an adjustment assembly (not shown in the figure), which can pass through any two through holes 31. The adjustment assembly is used to apply a rotational driving force to the adjustment cover 30 to drive the adjustment cover 30 to rotate threadedly relative to the second connecting section 22. Specifically, the adjustment assembly may include two rod-shaped members, one end of which can be inserted into the two through holes 31, and the other end of which can be provided with an operating part for easy gripping and application of a rotational driving force to the adjustment cover 30. When adjusting the position of the adjustment cover 30, the fastening assembly 40 is first removed, then one end of each of the two rod-shaped members is inserted into any two through holes 31, and a rotational driving force is applied to the other end of the rod-shaped members to drive the adjustment cover 30 to rotate relative to the second connecting section 22. When the adjustment cover 30 rotates to the target position, the rotational driving force applied to the rod-shaped members is stopped, and the rod-shaped members are pulled out of the through holes 31.

[0061] Subsequently, the position of the transmission gear 20 is adjusted so that it drives the adjusting cover 30 to abut against the transmission shaft 10. Finally, the fastening assembly 40 is inserted into the new through hole 31 and threaded hole 11 to lock the adjusting cover 30 and the transmission shaft 10. Using the aforementioned adjustment assembly makes it easier to adjust the position of the adjusting cover 30, reducing operational difficulty and improving adjustment efficiency.

[0062] In another embodiment, the adjustment component is a rod-shaped member, one end of which is inserted into any of the through holes 31, and a rotational driving force is applied to the other end of the rod-shaped member to rotate the adjustment cover 30. This structure is simpler, but inconvenient in operation, and is suitable for products that require a small rotational driving force.

[0063] In one embodiment, such as Figure 8 The diagram shown is a schematic representation of the transmission shaft 10 according to the second embodiment of this application; as shown Figure 9The diagram shows a schematic of the adjustment cover 30 according to the second embodiment of this application. A threaded hole 11 is provided at one end of the drive shaft 10 facing the adjustment cover 30. The adjustment cover 30 also has multiple through holes 31 along its axial direction. These through holes 31 include a central through hole 311 and circumferential through holes 312 symmetrically arranged along the central through hole 311. The fastening assembly 40 passes through the central through hole 311 and the threaded hole 11 in sequence. The central through hole 311 of the adjustment cover 30 is coaxially arranged with the threaded hole 11 of the drive shaft 10, allowing the fastening assembly 40 to pass smoothly and achieve locking. The circumferential through holes 312 are evenly spaced around the central through hole 311. This arrangement not only provides multiple locking position options but also increases the flexibility of adjustment. When it is necessary to adjust the axial position of the drive gear 20, the fastening assembly 40 can be removed first, and then the axial position of the adjustment cover 30 in the second connecting section 22 can be changed by rotating it. This structural design not only simplifies the adjustment process but also improves the accuracy and stability of the adjustment, making the adjustment more precise and essentially achieving stepless adjustment.

[0064] In one embodiment, such as Figure 9 As shown, there are two circumferential through holes 312, and the two circumferential through holes 312 are symmetrically distributed with the central through hole 311 as the center. This arrangement not only makes the adjusting cover 30 more balanced and stable during rotational adjustment, but also reduces the eccentric force generated by rotational adjustment, thereby improving the overall stability and durability of the transmission mechanism 100.

[0065] In one embodiment, such as Figure 3 and 4 As shown, the end of the drive shaft 10 has an external spline 12, and the first connecting section 21 has an internal spline 23, which is sleeved on the external spline 12. The external spline 12 and the internal spline 23 form a spline connection, which transmits rotational torque to the first connecting section 21 when the drive shaft 10 rotates, causing the first connecting section 21 to rotate under the action of the rotational torque. The spline has the advantages of compact structure, stable connection, and high transmission efficiency, ensuring the smoothness and reliability of torque transmission.

[0066] In another embodiment, keyways (not shown in the figure) are provided at the end of the drive shaft 10 and on the inner wall of the first connecting section 21. The transmission mechanism 100 also includes a key (not shown in the figure), which is housed in a closed space formed by two keyways. When the drive shaft 10 rotates, it transmits rotational torque to the key, which drives the transmission gear 20 to rotate, thereby maintaining a driving connection between the drive shaft 10 and the transmission gear 20. Using the above structure, a stable connection between the drive shaft 10 and the transmission gear 20 can also be achieved, and the structure is simple and easy to process and assemble.

[0067] In one embodiment, a method for adjusting a transmission mechanism 100 is provided. The method includes: removing the fastening assembly 40; adjusting the axial position of the adjusting cover 30 relative to the second connecting section 22; adjusting the position of the transmission gear 20 relative to the transmission shaft 10 so that the transmission shaft 10 abuts against the adjusting cover 30; and locking the adjusting cover 30 and the transmission shaft 10 using the fastening assembly 40. During the adjustment process, it is essential to ensure that the transmission mechanism 100 is in a non-operating state to avoid damage or safety hazards during adjustment. When removing the fastening assembly 40, appropriate tools should be used to avoid damage to the fastening assembly 40 or other parts of the transmission mechanism 100. After removing the fastening assembly 40, the axial position of the adjusting cover 30 in the second connecting section 22 is adjusted by rotating it. This step can be performed using the adjusting assembly. Subsequently, the position of the transmission gear 20 relative to the transmission shaft 10 is adjusted so that the adjusting cover 30 abuts against the transmission shaft 10 to ensure the reliability of the transmission mechanism 100 in subsequent operation. Finally, the adjusting cover 30 and the drive shaft 10 are locked by the fastening assembly 40 to prevent loosening or falling off during the operation of the transmission mechanism 100.

[0068] In one embodiment, the outer periphery of the adjusting cover 30 has external threads, and the second connecting section 22 has internal threads. The step of adjusting the position of the adjusting cover 30 relative to the second connecting section 22 includes: obtaining the adjustment distance and adjustment direction of the transmission gear 20; determining the rotation angle of the adjusting cover 30 based on the adjustment distance; determining the rotation direction of the adjusting cover 30 based on the adjustment direction; and rotating the adjusting cover 30 according to the rotation angle and rotation direction. The adjustment distance and adjustment direction of the transmission gear 20 can be determined based on the coplanarity deviation value between the two gears. The pitch parameter of the external thread of the adjusting cover 30 can be obtained in advance. After determining the adjustment distance and adjustment direction, the corresponding rotation angle and rotation direction can be calculated to rotate the adjusting cover 30. Using the above adjustment method, the position of the transmission gear 20 can be precisely controlled, thereby ensuring the stability and reliability of the transmission mechanism 100 during operation. In addition, since the adjusting cover 30 and the second connecting section 22 are connected by threads, this connection method is not only simple in structure but also has good self-locking performance, which can effectively prevent loosening or falling off during the operation of the transmission mechanism 100.

[0069] In one embodiment, the adjusting cover 30 also has a plurality of through holes 31 along the axial direction. The through holes 31 are evenly spaced along the circumference of the adjusting cover 30, and the included angle between any two adjacent through holes 31 is the unit rotation angle. The step of determining the rotation angle of the adjusting cover 30 based on the adjustment distance includes: determining the theoretical rotation angle of the adjusting cover 30 based on the adjustment distance; determining the multiple relationship between the theoretical rotation angle and the unit rotation angle; and determining the actual rotation angle of the adjusting cover 30 based on the multiple relationship and the unit rotation angle. For example, if there are four through holes 31, and the angle formed between each adjacent through hole 31 and the center of the adjusting cover 30 is 90 degrees, then when the theoretical rotation angle is determined to be 180 degrees, rotating two unit rotation angles is sufficient to adjust the adjusting cover 30. When the theoretical rotation angle is determined to be 100 degrees, the multiple relationship between the theoretical rotation angle and the unit rotation angle is greater than one integer multiple and less than two integer multiples, so the actual rotation angle can be determined to be 90 degrees. The position of the adjusting cover 30 is then adjusted based on the actual rotation angle. Using the above adjustment method makes the adjustment process more flexible and facilitates adjustments according to actual needs. Furthermore, since the number of through holes 31 on the adjusting cover 30 is limited, the adjusted position has a certain degree of dispersion. However, in practical applications, this dispersion is usually acceptable, as the thread pitch typically corresponds to a small distance value and will not significantly affect the performance of the transmission mechanism 100. If higher adjustment precision is desired, more through holes 31 can be added, or the pitch parameters of the internal and external threads can be adjusted to achieve a similar effect to stepless adjustment. In addition, the engagement of the through holes 31 on the adjusting cover 30 and the threaded holes 11 on the transmission shaft 10 allows for the fixation of the adjusting cover 30's position, ensuring the stability of the transmission mechanism 100 during operation.

[0070] In one embodiment, an agricultural machine is provided, including the aforementioned transmission mechanism 100. The transmission mechanism 100 can be installed in the drive system of the agricultural machine to transmit driving torque and drive various actuators of the agricultural machine to work, such as a traveling mechanism and a cleaning mechanism. Because the transmission mechanism 100 has advantages such as simple structure, convenient adjustment, and good stability, it can improve the working efficiency and reliability of the agricultural machine.

[0071] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A transmission mechanism, characterized in that, include: Drive shaft (10); The transmission gear (20) has a mounting hole through which the transmission shaft (10) is inserted along the axial direction. The transmission gear (20) includes a first connecting section (21) and a second connecting section (22) connected axially in sequence. The first connecting section (21) is sleeved on the transmission shaft (10) and drivenly connected to the transmission shaft (10). An adjusting cover (30) is inserted into the second connecting section (22), and the axial position of the adjusting cover (30) in the second connecting section (22) is adjustable; The fastening assembly (40) sequentially connects the adjusting cover (30) and the drive shaft (10) and locks the drive shaft (10) and the adjusting cover (30). When the fastening assembly (40) is removed, the axial position of the adjusting cover (30) relative to the second connecting section (22) and the axial position of the drive gear (20) relative to the drive shaft (10) are adjusted so that the drive shaft (10) and the adjusting cover (30) abut against each other.

2. The transmission mechanism according to claim 1, characterized in that, The outer periphery of the adjusting cover (30) is threadedly connected to the inner wall of the second connecting section (22), and the inner diameter of the second connecting section (22) is larger than the outer diameter of the drive shaft (10).

3. The transmission mechanism according to claim 1, characterized in that, The drive shaft (10) has a threaded hole (11) at one end facing the adjustment cover (30), and the adjustment cover (30) also has a plurality of through holes (31) along the axial direction. The fastening assembly (40) passes through one of the through holes (31) and the threaded hole (11) in sequence.

4. The transmission mechanism according to claim 3, characterized in that, Multiple through holes (31) are evenly spaced along the circumference of the adjustment cover (30) and are arranged symmetrically around the center of the adjustment cover (30).

5. The transmission mechanism according to claim 3, characterized in that, The transmission mechanism (100) further includes: An adjustment assembly, which can pass through any two of the through holes (31), is used to apply a rotational driving force to the adjustment cover (30) to drive the adjustment cover (30) to rotate threadedly relative to the second connecting segment (22).

6. The transmission mechanism according to claim 1, characterized in that, The drive shaft (10) has a threaded hole (11) at one end facing the adjustment cover (30). The adjustment cover (30) also has a plurality of through holes (31) along the axial direction. The plurality of through holes (31) include a central through hole (311) and circumferential through holes (312) symmetrically arranged along the central through hole (311). The fastening assembly (40) passes through the central through hole (311) and the threaded hole (11) in sequence.

7. The transmission mechanism according to claim 6, characterized in that, The number of the circumferential through holes (312) is two, and the two circumferential through holes (312) are symmetrically distributed with the central through hole (311) as the center.

8. The transmission mechanism (100) according to any one of claims 1 to 7, characterized in that, The end of the drive shaft (10) has an external spline (12), and the first connecting section (21) has an internal spline (23), which is sleeved on the external spline (12).

9. The transmission mechanism according to any one of claims 1 to 7, characterized in that, Both the end of the drive shaft (10) and the inner wall of the first connecting section (21) are provided with flat keyways. The drive shaft (10) also includes: A flat key, which is housed in a closed space formed by two flat keyways.

10. An agricultural machine, characterized in that, The transmission mechanism (100) includes any one of claims 1 to 6.

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