Reel assembly for harvester and harvester

Abstract

The utility model relates to the field of agricultural machinery, and discloses a reel assembly for a harvester and the harvester, the reel assembly comprises a reel support arm, a movable support, a reel main shaft, a displacement driving device and a belt tensioning mechanism, the movable support and the reel support arm form sliding fit; the reel main shaft is rotatably arranged in the movable support; the displacement driving device is used for driving the reel main shaft to move along the length direction of the reel support arm; the belt tensioning mechanism can tension a transmission belt which is connected between a driving wheel of the harvester and the reel main shaft in a transmission mode in the moving process of the reel main shaft. According to the reel assembly and the harvester, the position of the reel can be automatically adjusted, the labor intensity of operators is reduced, and the harvesting operation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to a reel assembly for a harvester and a harvester. Background Technology

[0002] The reel is a harvester mechanism used to guide crop toward the cutter while supporting the crop stalks to ensure a clean cut. The reel is typically located in front of the header. When encountering lodged or partially lodged crops, the reel's position needs to be adjusted to ensure successful harvesting. Current adjustment methods primarily rely on manual adjustment of the reel's position, using pin holes or bolts to secure it. This requires stopping the machine and adjusting the drive belt tension, resulting in low harvesting efficiency, high labor intensity, and an inability to meet continuous adjustment needs. Utility Model Content

[0003] In view of at least one of the above-mentioned defects or deficiencies in the prior art, this application provides a reel assembly for a harvester and a harvester, which realizes automated adjustment of the position of the reel, reduces the labor intensity of the operator, and improves harvesting efficiency.

[0004] To achieve the above objectives, this application provides a reel assembly for a harvester, comprising:

[0005] Reel arm;

[0006] The movable support slides into contact with the reel arm.

[0007] The reel spindle is rotatably mounted in the movable support;

[0008] A displacement drive device is used to drive the main shaft of the reel to move along the length direction of the reel arm; and

[0009] A belt tensioning mechanism is used to tension the drive belt connecting the drive wheel of the harvester and the main shaft of the reel during the movement of the reel spindle.

[0010] In some embodiments, the belt tensioning mechanism includes:

[0011] Multiple tension pulleys are arranged at intervals along the belt's travel direction; and

[0012] The tensioning pulley displacement assembly is used to adjust the relative positions of the multiple tensioning pulleys so that the transmission belt switches between a tensioned state and a slack state.

[0013] In some embodiments, the tensioning wheel displacement assembly includes a tensioning swing arm, the middle of which is hinged to the reel arm and both ends are swing ends, and two tensioning wheels are respectively disposed at the two swing ends.

[0014] In some embodiments, the tensioning wheel displacement assembly further includes a transmission link, one end of which is hinged to either of the two swing ends, and the other end is hinged to the movable support.

[0015] In some embodiments, the transmission link is configured as a resilient telescopic rod preloaded between the swing end and the movable support.

[0016] In some embodiments, the elastic telescopic rod includes a rod body and a first sleeve, a second sleeve, and a spring sleeved outside the rod body. The first sleeve is movably disposed at one end of the rod body and is hinged to one of the swing end and the movable support. The second sleeve is spaced apart from the first sleeve and fixedly connected to the rod body. The spring is pre-tensioned between the first sleeve and the second sleeve.

[0017] In some embodiments, the outer peripheral wall of the rod body is formed with an external threaded segment extending along the length direction, and the second rod sleeve is formed as an internal threaded sleeve and forms a threaded connection with the external threaded segment.

[0018] In some embodiments, the displacement drive device is configured as a linear telescopic device, which includes a cylinder portion disposed on the reel arm and a movable rod movably inserted into the cylinder portion, the outer end of the movable rod being connected to the movable support.

[0019] In some embodiments, the linear telescopic device is a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

[0020] A second aspect of this application provides a harvester including the aforementioned reel assembly for a harvester.

[0021] Through the above technical solution, the reel assembly for a harvester of this application can directly drive the reel spindle along the length of the reel arm via a displacement drive device to adjust the reel's position relative to the header, thereby achieving automated reel adjustment. Compared with existing manual adjustment methods, this effectively reduces the operator's labor intensity, improves field harvesting efficiency, and meets the need for continuous adjustment. Furthermore, during reel adjustment, the belt tensioning mechanism maintains tension on the transmission belt connecting the harvester's drive wheel and the reel spindle, preventing belt tension from loosening due to a decrease in the distance between the reel spindle and the drive wheel, thus meeting the requirement for reel adjustment without stopping the machine.

[0022] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0023] 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:

[0024] Figure 1 This is a schematic diagram of a reel assembly for a harvester according to a specific embodiment of this application;

[0025] Figure 2 for Figure 1 A magnified view of a portion of the reel assembly.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Reel arm 2. Movable support

[0028] 3. Reel spindle; 4. Displacement drive device

[0029] 5 tensioning pulleys and 6 tensioning swing arms

[0030] 7. Connecting rod 8. Drive belt

[0031] 9. Drive wheel

[0032] 701 Club body 702 First club sleeve

[0033] 703 Second rod sleeve 704 Spring Detailed Implementation

[0034] 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.

[0035] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0036] like Figure 1 and Figure 2As shown, a first exemplary embodiment of this application provides a reel assembly for a harvester. The reel assembly mainly includes a reel arm 1, a movable support 2, a reel spindle 3, a displacement drive device 4, and a belt tensioning mechanism. The reel arm 1 is fixedly connected to the harvester's header. The movable support 2 slides against the reel arm 1. For example, the reel arm 1 may be equipped with a linear guide rail, and the movable support 2 may be equipped with a ball bearing slider that cooperates with the linear guide rail; this application does not limit this. The reel spindle 3 is rotatably mounted in the movable support 2, for example, it can be mounted in the movable support 2 via bearings. The displacement drive device 4 drives the reel spindle 3 to move along the length of the reel arm 1. For example, it can drive the movable support 2 to move along the reel arm 1, thereby moving the reel spindle 3. The belt tensioning mechanism can tension the transmission belt 8, which is connected between the drive wheel 9 and the main shaft 3 of the harvester, during the movement of the reel spindle 3.

[0037] Therefore, the reel assembly for a harvester in this exemplary embodiment can directly drive the reel spindle 3 along the length of the reel arm 1 via the displacement drive device 4 to adjust the reel's position relative to the header, thereby achieving automated reel adjustment. Compared with existing manual adjustment methods, this effectively reduces the operator's labor intensity, improves field harvesting efficiency, and meets the need for continuous adjustment. Furthermore, during reel adjustment, the belt tensioning mechanism maintains tension on the transmission belt 8 connected between the drive wheel 9 and the reel spindle 3, ensuring that the tension of the transmission belt 8 does not loosen due to a decrease in the distance between the reel spindle 3 and the drive wheel 9. This allows for continuous reel adjustment without affecting the normal rotation of the reel.

[0038] In one embodiment, the belt tensioning mechanism includes a plurality of tensioning pulleys 5 and a tensioning pulley displacement assembly. The plurality of tensioning pulleys 5 are arranged sequentially at intervals along the running direction of the drive belt 8, and the tensioning pulley displacement assembly is used to adjust the relative positional relationship of the plurality of tensioning pulleys 5, so that the drive belt 8 can switch between a tensioned state and a slack state.

[0039] Understandably, the position of the drive pulley 9 is fixed relative to the reel spindle 3. The drive belt 8 travels between the drive pulley 9, multiple tension pulleys 5, and the reel spindle 3. The multiple tension pulleys 5 are all positioned between the drive pulley 9 and the reel spindle 3. Assuming the elasticity of the drive belt 8 is negligible, the amount of belt travel between the tension pulleys 5 determines the tension of the drive belt 8. When the distance between the reel spindle 3 and the drive pulley 9 remains constant, adjusting the relative positions of the tension pulleys 5 using the tension pulley displacement assembly can change the amount of belt travel between the tension pulleys 5, allowing the drive belt 8 to switch between a tensioned and slack state. Therefore, during the adjustment of the reel position, when the reel spindle 3 moves away from the drive pulley 9 (i.e., the distance between the reel spindle 3 and the drive pulley 9 increases), the relative positions of the tension pulleys 5 can be adjusted to reduce the amount of belt travel between the tension pulleys 5, thus maintaining the tension of the drive belt 8. Similarly, when the reel spindle 3 moves closer to the drive wheel 9, that is, when the distance between the reel spindle 3 and the drive wheel 9 decreases, the tension of the drive belt 8 remains unchanged by increasing the amount of belt travel between the multiple tensioning wheels 5.

[0040] This application does not limit the method of adjusting the positional relationship of the multiple tensioning pulleys 5, as long as it can increase or decrease the amount of belt travel of the transmission belt 8 between the multiple tensioning pulleys 5. For example, a translation mechanism can be set to drive the multiple tensioning pulleys 5 to translate relative to each other, or a rotation mechanism can be used to drive the multiple tensioning pulleys 5 to rotate around a rotation center for adjustment. Taking rotation adjustment as an example, refer to... Figure 1 There are two tensioning wheels 5, which are respectively pressed against the top and bottom surfaces of the transmission belt 8. The tensioning wheel displacement assembly includes a tensioning swing arm 6. The middle part of the tensioning swing arm 6 is hinged to the reel arm 1 and both ends are swing ends. The two tensioning wheels 5 are respectively set at the two swing ends. In other words, when the tensioning swing arm 6 rotates, the two tensioning wheels 5 can rotate around the middle part of the tensioning swing arm 6 to adjust their relative positions.

[0041] For details, please refer to Figure 2In the initial state, the two tensioning pulleys 5 are arranged vertically and horizontally along the direction of the drive belt 8. The upper tensioning pulley 5 is located closer to the drive pulley 9, and the lower tensioning pulley 5 is located closer to the reel shaft 3. The portion of the drive belt 8 passing over the two tensioning pulleys 5 forms an S-shape. In the initial state, the two tensioning pulleys 5 press against the drive belt 8, putting it in a taut state. When the tensioning arm 6 rotates clockwise, the upper tensioning pulley 5 moves towards the reel shaft 3, and the lower tensioning pulley 5 moves towards the drive pulley 9, allowing the drive belt 8 to transition from a taut to a slack state. Conversely, when the tensioning arm 6 rotates counterclockwise, the upper tensioning pulley 5 moves towards the drive pulley 9, and the lower tensioning pulley 5 moves towards the reel shaft 3, allowing the slack drive belt 8 to transition back to a taut state.

[0042] Therefore, the rotation of the tensioning arm 6 can be linked with the sliding of the reel main shaft 3 on the reel support arm 1. When the reel main shaft 3 moves away from the drive wheel 9, the tensioning arm 6 rotates clockwise. Conversely, when the reel main shaft 3 moves closer to the drive wheel 9, the tensioning arm 6 rotates counterclockwise. This ensures that the transmission belt 8 remains taut throughout the movement and adjustment of the reel main shaft 3, without affecting the normal operation of the reel.

[0043] In the above-mentioned linkage adjustment process, the tensioning arm 6 can be rotated by the movement of the reel spindle 3. Alternatively, a rotary drive device can be set to drive the tensioning arm 6 to rotate actively. The rotation direction and timing need to be determined according to the movement direction and timing of the reel spindle 3.

[0044] It should be noted that the rotation adjustment of the tensioning swing arm 6 mentioned above is only for... Figure 1 and Figure 2 The illustrated embodiment will be used for explanation. In actual operation, the rotation direction of the tensioning arm 6 needs to be determined according to the pressing position of the tensioning pulley 5 against the transmission belt 8, for example, by changing... Figure 2 The two tensioning pulleys 5 are positioned such that the upper tensioning pulley 5 presses against the top surface of the transmission belt 8, and the lower tensioning pulley 5 presses against the bottom surface of the transmission belt 8. In this way, when the tensioning swing arm 6 rotates clockwise, the transmission belt 8 can be adjusted to a tensioned state, and conversely, when the tensioning swing arm 6 rotates counterclockwise, the transmission belt 8 can be adjusted to a slack state.

[0045] To achieve better driven adjustment of the tensioning swing arm 6, a transmission link 7 can be installed between the tensioning swing arm 6 and the reel spindle 3. On the one hand, the transmission link 7 can drive the tensioning swing arm 6 to rotate. On the other hand, the transmission link 7 can support the tensioning swing arm 6, so that the tensioning swing arm 6 can be fixed in a certain position after adjustment. At the same time, it ensures that the two tensioning wheels 5 at both ends of the tensioning swing arm 6 can press the transmission belt 8, and prevents the tension of the transmission belt 8 from pushing the tensioning swing arm 6 to rotate in the direction of loosening the transmission belt 8, thus maintaining the tension of the transmission belt 8 at all times.

[0046] Specifically, refer to Figure 2 One end of the transmission link 7 is hinged to either of the two swing ends of the tensioning swing arm 6, and the other end is hinged to the movable support 2. Thus, when the displacement drive device 4 drives the movable support 2 to move along the reel arm 1 to drive the reel main shaft 3 to move, the transmission link 7 can follow the movable support 2 to move, thereby driving the tensioning swing arm 6 to swing.

[0047] In one embodiment, the transmission link 7 is formed as an elastic telescopic rod pre-tensioned between the swing end of the tensioning swing arm 6 and the movable support 2. Under the elastic force of the telescopic rod, the tensioning swing arm 6 can maintain a tendency to rotate in the direction of tensioning the transmission belt 8, so that the transmission belt 8 remains taut. In addition, the transmission link 7 has the ability to elastically extend and retract, which can buffer the impact force generated by the displacement drive device 4 when driving the movable support 2 to move on the transmission link 7 to a certain extent, effectively extending the service life of the transmission link 7.

[0048] Specifically, refer to Figure 2 The elastic telescopic rod includes a rod body 701 and a first sleeve 702, a second sleeve 703, and a spring 704, all sleeved around the rod body 701. The first sleeve 702 is movably mounted at one end of the rod body 701 and is hinged to either the swing end or the movable support 2. The second sleeve 703 is spaced apart from the first sleeve 702 and fixedly connected to the rod body 701. The spring 704 is pre-tensioned between the first sleeve 702 and the second sleeve 703. The rod body 701 possesses a certain rigidity, ensuring the stability of the support for the tensioning swing arm 6. Furthermore, the rod body 701 acts as a guide, effectively guiding the movement of the first sleeve 702 and the extension / retraction adjustment of the spring 704. Overall, this elastic telescopic rod has a simple structure, low production cost, and is easy to maintain. Under the elastic force of the spring 704, it effectively pushes the tensioning swing arm 6 to maintain a tendency to rotate in the direction of the tensioning transmission belt 8, thus keeping the transmission belt 8 taut.

[0049] To allow for adjustment of the pre-compression of spring 704, the outer peripheral wall of rod 701 can be formed with an externally threaded section extending along its length. The second sleeve 703 is formed as an internally threaded sleeve and is threadedly connected to the externally threaded section. Therefore, by turning the second sleeve 703, the distance between the second sleeve 703 and the first sleeve 702 can be adjusted, thereby adjusting the compression of spring 704 to meet the tension requirements of the transmission belt 8 under different working conditions and improve versatility. Furthermore, the second sleeve 703 can be used with a lock nut. After adjusting the compression of spring 704, the lock nut can be used to limit and tighten the second sleeve 703, improving the stability of spring adjustment and buffering.

[0050] In one embodiment, the displacement driving device 4 can be configured as a linear telescopic device, which includes a cylinder portion disposed on the reel arm 1 and a movable rod movably inserted into the cylinder portion, the outer end of the movable rod being connected to a movable support 2. By driving the movable rod to extend or retract through the cylinder portion, the movable support 2 can be moved along the length direction of the reel arm 1. The movable rod has a certain rigidity, which can improve the stability of the movement of the movable support 2. Specifically, the linear telescopic device can be one or more of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, and this application does not limit this to any particular type.

[0051] The second embodiment of this application provides a harvester including the aforementioned reel assembly for harvesting. Clearly, the harvester of this exemplary embodiment possesses all the technical effects brought about by the aforementioned reel assembly, and therefore will not be described in detail here.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 reel assembly for a harvester, characterized by, include: Reel arm (1); The movable support (2) forms a sliding fit with the reel arm (1); The reel spindle (3) is rotatably mounted in the movable support (2); The displacement drive device (4) is used to drive the main shaft (3) of the reel to move along the length direction of the reel arm (1); and A belt tensioning mechanism is used to tension the transmission belt (8) that is connected between the drive wheel (9) of the harvester and the main shaft (3) of the reel during the movement of the reel spindle (3).

2. A reel assembly for a harvester as claimed in claim 1, characterised in that, The belt tensioning mechanism includes: Multiple tension pulleys (5) are arranged sequentially at intervals along the running direction of the transmission belt (8); and The tensioning wheel displacement assembly is used to adjust the relative positions of the multiple tensioning wheels (5) so that the transmission belt (8) switches between a tensioned state and a slack state.

3. A reel assembly for a harvesting machine according to claim 2, characterised in that, The tensioning wheel displacement assembly includes a tensioning swing arm (6), the middle part of which is hinged to the reel arm (1) and both ends are swing ends, and the two tensioning wheels (5) are respectively arranged at the two swing ends.

4. A reel assembly for a harvesting machine according to claim 3, characterised in that, The tensioning wheel displacement assembly also includes a transmission link (7), one end of which is hinged to either of the two swing ends, and the other end is hinged to the movable support (2).

5. A reel assembly according to claim 4, wherein, The transmission link (7) is formed as an elastic telescopic rod that is pre-tightly arranged between the swing end and the movable support (2).

6. A reel assembly for a harvester as claimed in claim 5, characterised in that, The elastic telescopic rod includes a rod body (701) and a first sleeve (702), a second sleeve (703), and a spring (704) sleeved outside the rod body (701). The first sleeve (702) is movably disposed at one end of the rod body (701) and is hinged to one of the swing end and the movable support (2). The second sleeve (703) is spaced apart from the first sleeve (702) and fixedly connected to the rod body (701). The spring (704) is pre-tensioned between the first sleeve (702) and the second sleeve (703).

7. A reel assembly for a harvester as claimed in claim 6, characterised in that, The outer peripheral wall of the rod (701) is formed with an external threaded section extending along the length direction, and the second rod sleeve (703) is formed as an internal threaded sleeve and forms a threaded connection with the external threaded section.

8. A reel assembly for a harvesting machine according to any one of claims 1 to 7, characterised in that, The displacement drive device (4) is formed as a linear telescopic device, which includes a cylinder portion disposed on the reel arm (1) and a movable rod movably inserted into the cylinder portion, the outer end of the movable rod being connected to the movable support (2).

9. A reel assembly for a harvester as claimed in claim 8, characterised in that, The linear telescopic device is a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

10. A harvester characterized by The harvester includes a reel assembly for a harvester according to any one of claims 1 to 9.

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