Vertical header clamping conveying chain tensioning device and corn harvester

Abstract

The utility model discloses a vertical header clamping conveying chain tensioning device and a corn harvester, and relates to the technical field of agricultural machinery, the vertical header clamping conveying chain tensioning device comprises a tensioning seat and a tensioning support which are located at the two ends of a conveying chain, the tensioning seat is fixedly connected with a driving chain wheel of the conveying chain, and the tensioning support is fixedly connected with a driven chain wheel; a pull rod capable of axially moving is connected between the tensioning seat and the tensioning support, a tensioning pressure spring is sleeved outside the pull rod, one end of the tensioning pressure spring is fixedly connected with the tensioning seat, and the other end of the tensioning pressure spring acts on the tensioning support; the tensioning pressure spring is arranged between the tensioning seat and the tensioning support to be matched with the pull rod, and the tensioning support can be driven by elastic force of the tensioning pressure spring when the conveying chain is loosened, so that a driven chain wheel of the conveying chain is adjusted in a self-adaptive mode, the conveying chain is in a tensioning state, conveying failure is avoided, and the service life of the conveying chain is prolonged. And the stability of the header of the harvester in operation is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a vertical header clamping and conveying chain tensioning device and a corn harvester. Background Technology

[0002] Currently, most vertical header harvesting machinery in China, especially corn combine harvesters, uses fixed tension or tension springs for the clamping conveyor chain. This method has problems such as low space utilization and inconvenient tension adjustment. After a period of use, the chain is prone to insufficient tension space or spring breakage, resulting in the conveyor chain being unable to be tensioned and thus causing the conveying function to fail. Utility Model Content

[0003] In view of one or more shortcomings of the prior art, this utility model provides a vertical header clamping conveyor chain tensioning device and a corn harvester, which can keep the conveyor chain in a tensioned state and improve the stability of header operation; moreover, the chain tension can be adjusted by simply adjusting the position of the nut on the pull rod, which has a simple and compact structure and is more convenient to adjust.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A vertical cutting table clamping conveyor chain tensioning device includes tensioning seats and tensioning brackets located at both ends of the conveyor chain. The tensioning seats are fixedly connected to the driving sprocket of the conveyor chain, and the tensioning brackets are fixedly connected to the driven sprocket.

[0006] An axially movable tie rod is connected between the tensioning seat and the tensioning bracket. A tensioning spring is sleeved on the tie rod. One end of the tensioning spring is fixed to the tensioning seat, and the other end acts on the tensioning bracket.

[0007] As a further implementation, a stop block is fitted on the pull rod, one end of the tension spring is fixedly connected to the tensioning seat, and the other end abuts against the stop block, and the stop block is connected to the tensioning bracket through the pull rod.

[0008] As a further implementation, one end of the pull rod is welded to the tension bracket, and the other end is slidably connected to the inner hole of the tension seat.

[0009] As a further implementation, a limit nut is provided between the stop block and the tensioning bracket. The limit nut is fixedly installed on the pull rod to limit the range of movement of the stop block on the pull rod, thereby adjusting the chain tension.

[0010] As a further implementation, the pull rod is fitted with a sleeve, the tension spring is fitted outside the sleeve, and there is a gap between the inner ring of the sleeve and the pull rod; one end of the sleeve passes through the stop block and is fixedly connected to the stop block, and the other end passes through the inner hole of the tensioning seat.

[0011] As a further implementation, the sleeve abuts against the limiting nut.

[0012] As a further implementation, the tensioning seat is provided with a sliding outer tube, and the tensioning bracket is provided with a sliding inner tube. The sliding inner tube is coaxially arranged with the sliding outer tube and can slide relative to the sliding outer tube; it plays a guiding role in adjusting the distance between the tensioning seat and the tensioning bracket.

[0013] As a further implementation, the sliding outer tube is sleeved outside the sliding inner tube to serve as a guide; both the sliding outer tube and the sliding inner tube are made of square tubes.

[0014] As a further implementation, the sliding outer tube is disposed at the lower end of the tensioning seat and welded to the tensioning seat; the sliding inner tube is disposed at the lower part of the tensioning bracket and welded to the tensioning bracket.

[0015] A corn harvester includes a vertical header clamping and conveyor chain tensioning device as described in any of the preceding claims.

[0016] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model sets up a tension spring and a tie rod between the tension seat and the tension bracket. When the conveyor chain is loose, the elastic force of the tension spring can drive the tension bracket, thereby causing the passive sprocket of the conveyor chain to adjust adaptively, ensuring that the conveyor chain is in a tensioned state, avoiding conveying failure, and effectively improving the stability of the harvester's header during operation.

[0018] 2. This utility model is designed with a tension nut that works in conjunction with the pull rod and sleeve. The tension nut can limit the position of the stop block and the tension spring. By adjusting the position of the tension nut on the pull rod, the tension of the chain can be adjusted, which is convenient. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0020] Figure 1 This is a three-dimensional assembly diagram of an embodiment of the present utility model;

[0021] Figure 2This is an exploded perspective view of an embodiment of the present utility model;

[0022] Figure 3 This is a side view of an embodiment of the present utility model.

[0023] In the diagram: 1. Tensioning seat; 2. Tensioning bracket; 3. Tie rod; 4. Sleeve; 5. Tensioning spring; 6. Stop block; 7. Sliding outer tube; 8. Sliding inner tube; 9. Limit nut; 10. Conveyor chain; 11. Drive sprocket; 12. Driven sprocket. Detailed Implementation

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0026] Example 1

[0027] In one typical embodiment of this application, a vertical cutting table clamping conveyor chain tensioning device is provided, such as... Figures 1-3 As shown, it includes a tensioning seat 1 and a tensioning bracket 2 located at both ends of the conveyor chain. The tensioning seat 1 is fixedly connected to the driving sprocket 11 of the conveyor chain 10, and the tensioning bracket 2 is fixedly connected to the driven sprocket 12.

[0028] A pull rod 3 that can move axially is connected between the tensioning seat 1 and the tensioning bracket 2. A tensioning spring 5 is sleeved on the pull rod 3. One end of the tensioning spring 5 is fixed to the tensioning seat 1, and the other end acts on the tensioning bracket 2.

[0029] Specifically, such as Figure 1As shown, the tensioning device in this embodiment is applied to the clamping conveyor chain on the vertical cutting platform of a harvester for crops such as corn. The rear end of the conveyor chain is connected to the drive sprocket, and the front end is connected to the driven sprocket. In this embodiment, the drive sprocket 11 is fixedly installed in the tensioning seat 1, and the driven sprocket 12 is fixedly connected to the tensioning bracket 2. By connecting and adjusting the tensioning seat 1 and the tensioning bracket 2, the distance between the drive sprocket 11 and the driven sprocket 12 can be finely adjusted to achieve tensioning of the conveyor chain.

[0030] Specifically, in combination Figure 1 , Figure 2 As shown, the tensioning seat 1 and the tensioning bracket 2 are coaxially provided with inner holes. A pull rod 3 is provided between the tensioning seat 1 and the tensioning bracket 2. The pull rod 3 is a threaded rod that passes through the inner holes at both ends. One end of the pull rod 3 is welded and fixed to the tensioning bracket 2, and the other end passes through the inner hole of the tensioning seat 1, allowing it to move relative to the tensioning seat 1. This, in turn, drives the tensioning bracket 2 and the driven sprocket 12 to move relative to the tensioning seat 1. In this embodiment, a guide sleeve is provided at the end of the pull rod 3 that mates with the inner hole of the tensioning seat to limit the radial movement of the pull rod.

[0031] To achieve tensioning of the conveyor chain and ensure stable tension, in this embodiment, as follows: Figure 2 As shown, a tensioning spring 5 is provided on the tensioning seat 1 and the tensioning bracket 2. The tensioning spring 5 is sleeved on the outside of the pull rod 3, with one end fixedly connected to the tensioning seat 1 and the other end acting on the tensioning bracket 2.

[0032] Specifically, in combination Figure 2 , Figure 3 As shown, to prevent friction between the tension spring 5 and the pull rod 3 from damaging the threads on the pull rod 3, a sleeve 4 is provided between the pull rod 3 and the tension spring 5. The sleeve 4 is located on the outer circumference of the pull rod 3, and the tension spring 5 is sleeved on the outer circumference of the sleeve 4. There is a certain gap between the tension spring 5 and the sleeve 4, allowing the tension spring 5 to be freely compressed along the axial direction of the sleeve 4. In this embodiment, there is also a gap between the sleeve 4 and the pull rod 3, allowing the sleeve 4 to move together with the tension spring 5 along the direction of the pull rod 3, thereby preventing friction between the pull rod 3 and the tension spring 5 from damaging the threads on the pull rod 3 and ensuring the integrity of the sleeve and the tension spring 5.

[0033] In this embodiment, a stop block 6 is also fitted onto the pull rod 3, such as... Figure 2 As shown, the stop block 6 is fixedly installed at the end of the sleeve 4 away from the tensioning seat 1, and the sleeve 4 passes through the hole in the stop block 6. One end of the tensioning spring 5 is fixedly connected to the tensioning seat 1, and the other end abuts against the stop block 6. In this embodiment, the pull rod 3 is a threaded rod, and a limit nut 9 is also installed on the pull rod 3. The limit nut 9 serves to limit the position of the sleeve 4 and the tensioning spring 5. Figures 1-3As shown, the limiting nut 9 is located between the sleeve 4 and the tensioning bracket 2. Its position on the pull rod 3 is adjustable, and it is fixed by threaded engagement with the pull rod. The limiting nut 9 restricts the movement range of the stop block 6 on the pull rod 3, thereby adjusting the chain tension. When the tensioning spring 5 is tensioned, under the action of compression force, it drives the sleeve 4 to move axially through the stop block 6 until it abuts against the limiting nut 9. This, in turn, drives the tensioning bracket 2 to move axially through the limiting nut 9 and the pull rod 3, thus ensuring the tension of the conveyor chain 10. Furthermore, adjusting the position of the limiting nut 9 on the pull rod 3 controls the tension of the conveyor chain 10, making adjustment convenient and reliable.

[0034] To improve chain tensioning stability, a guide mechanism is installed between tensioning seat 1 and tensioning bracket 2. Figure 1 , Figure 2 As shown, a sliding outer tube 7 is fixedly installed on the tensioning seat 1, and a sliding inner tube 8 is fixedly installed on the tensioning bracket 2. The sliding outer tube 7 and the sliding inner tube 8 are coaxially connected and the free end of the sliding outer tube 7 is sleeved on the outside of the sliding inner tube 8. The sliding inner tube 8 can slide relative to the sliding outer tube 7, and plays a guiding role in the change of position between the tensioning seat and the tensioning bracket when the tensioning spring is in action.

[0035] Among them, such as Figure 2 As shown, the sliding outer tube 7 is located at the lower end of the tensioning seat 1 and is welded and fixed to the tensioning seat 1; the sliding inner tube 8 is located at the lower part of the tensioning bracket 2 and is welded and fixed to the tensioning bracket 2.

[0036] In this embodiment, both the sliding outer tube 7 and the sliding inner tube 8 are made of square tubes.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it. Those skilled in the art should understand that this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical cutting table clamping and conveyor chain tensioning device, characterized in that, It includes tension seats and tension brackets located at both ends of the conveyor chain. The tension seats are fixedly connected to the driving sprocket of the conveyor chain, and the tension brackets are fixedly connected to the driven sprocket. An axially movable pull rod connects the tensioning seat and the tensioning bracket. A tension spring is sleeved on the pull rod. One end of the tension spring is fixedly connected to the tensioning seat, and the other end acts on the tensioning bracket. A stop block is sleeved on the pull rod. One end of the tension spring is fixedly connected to the tensioning seat, and the other end abuts against the stop block. The stop block is connected to the tensioning seat through the pull rod. One end of the pull rod is welded to the tensioning bracket, and the other end is slidably connected to the inner hole of the tensioning seat.

2. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 1, characterized in that, A limit nut is provided between the stop block and the tensioning bracket, and the limit nut is fixedly installed on the tie rod.

3. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 2, characterized in that, The pull rod is fitted with a sleeve, and the tensioning spring is fitted outside the sleeve. There is a gap between the inner ring of the sleeve and the pull rod. One end of the sleeve passes through the stop block and is fixedly connected to the stop block, and the other end passes through the inner hole of the tensioning seat.

4. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 3, characterized in that, The sleeve abuts against the limiting nut.

5. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 1, characterized in that, The tensioning seat is provided with a sliding outer tube, and the tensioning bracket is provided with a sliding inner tube. The sliding inner tube is coaxially arranged with the sliding outer tube and can slide relative to the sliding outer tube.

6. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 5, characterized in that, The sliding outer tube is sleeved outside the sliding inner tube; both the sliding outer tube and the sliding inner tube are made of square tubes.

7. The vertical cutting table clamping and conveyor chain tensioning device as described in claim 5, characterized in that, The sliding outer tube is located at the lower end of the tensioning seat and is welded and fixed to the tensioning seat; the sliding inner tube is located at the lower part of the tensioning bracket and is welded and fixed to the tensioning bracket.

8. A corn harvester, characterized in that, Includes a vertical cutting table clamping conveyor chain tensioning device as described in any one of claims 1-7.

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