Harvester and track tensioning mechanism

Abstract

The utility model discloses a harvester and a track tensioning mechanism, and belongs to the field of harvesters. The floating section comprises an elastic part, sliding rods, a first push plate and a second push plate, the two ends of the elastic part abut against the first push plate and the second push plate correspondingly, the first push plate and the second push plate are connected through at least two sliding rods, the first push plate is slidably connected with the sliding rods, and the second push plate is fixedly connected with the sliding rods; wherein the first push plate is detachably connected to the supporting rod, the second push plate abuts against the wheel assembly, the floating section can move on the supporting rod to change the tensile force of the walking crawler belt, and when a user needs to disassemble and assemble the crawler belt tensioning mechanism, the first push plate can be disassembled from the supporting rod, so that the whole floating section can be separated from the tensioning sliding way; the wheel assembly is simple in structure, convenient to disassemble and assemble, capable of saving time and labor, easy to overhaul and maintain, more suitable for the working state of the harvester and better in adaptability to the severe working environment.

Description

Technical Field

[0001] The present application relates to the technical field of harvesters, and more specifically, to a harvester and a track tensioning mechanism. Background Art

[0002] The existing rice and wheat combine harvesters all use crawler tracks for their traveling mechanisms. The crawler tracks are basically tensioned in a rigid manner, that is, a tensioning screw is threadedly connected to a tensioning push plate, the tensioning screw is rotated to drive the tensioning push plate to move forward and backward, and the tensioning push plate pushes the tensioning wheel frame forward, the tensioning wheel is fixedly mounted on the tensioning wheel frame, and moves forward together with the tensioning wheel frame, thereby tensioning the crawler tracks.

[0003] At present, the track tensioning methods of combine harvesters are mainly two tensioning methods: using the tensioning screw to pull in the opposite direction or directly pushing the tensioning wheel frame to move in the positive direction. That is to say, one tensioning screw bears the role of tension and the other bears the role of pressure. However, no matter which tensioning method is used, it is rigid tensioning, that is, as long as the tensioning screw is adjusted and fixed, the tensioning wheel will be fixed, and the walking track is rigidly tensioned. When the combine harvester is working in the field, it must constantly adjust forward and backward. Due to the large number of ridges between paddy fields, the walking track often hits the ridges, especially when reversing; when colliding, the walking track will generate a large impact force; due to the rigid tensioning, this impact force will be directly transmitted from the tension wheel to the tensioning wheel frame and the tensioning screw, causing the tensioning wheel frame and the tensioning screw to deform, crack and fail.

[0004] For example, a Chinese patent document (Announcement No.: CN 206719345 U) provides a track tensioning device on a sugarcane harvester, including a plunger cylinder, a spring and a guide wheel bracket, one end of the plunger cylinder is provided with an oil filling port, a piston is installed inside the plunger cylinder, a travel cavity is welded on the plunger cylinder, a pressure plate is installed inside the travel cavity near one end of the plunger cylinder, one end of the spring is connected to the pressure plate, a spring pressure plate is installed inside the other end of the travel cavity, one side of the spring pressure plate is connected to the other end of the spring, the guide wheel bracket is installed at one end of the travel cavity near the spring pressure plate, the other end of the guide wheel bracket is installed with a guide wheel shaft, and a guide wheel is installed on the guide wheel shaft. It uses the method of matching a hydraulic cylinder with a spring to try to solve the above problems, but due to the harsh working environment of the harvester, the ground is uneven, the track tensioning device is close to the chassis of the harvester, and mud is easily introduced into the gap, and the hydraulic cylinder is often damaged, resulting in failure of work and difficulty in disassembly and assembly.

[0005] For the above problems, the related technologies do not provide effective solutions. Summary of the invention

[0006] In order to solve the problems that may exist in the related art, some embodiments of the present application provide a track tensioning mechanism for a harvester, including: a tensioning slide fixed to a frame; a wheel assembly movably connected to the tensioning slide, including a tensioning wheel, the tensioning wheel extending out of one end of the tensioning slide; a guide assembly fixed to the end of the tensioning slide away from the tensioning wheel; an adjustment assembly, including a support rod and a floating section, one end of the support rod is detachably connected to the guide assembly, and the other end is connected to the floating section; the floating section includes an elastic member, a sliding rod, a first push plate and a second push plate, the two ends of the elastic member respectively abut against the first push plate and the second push plate, the first push plate and the second push plate are connected by at least two of the sliding rods, the first push plate is slidably connected to the sliding rod, and the second push plate is fixedly connected to the sliding rod; wherein the first push plate is detachably connected to the support rod, the second push plate abuts against the wheel assembly, and the floating section can move on the support rod to change the tensioning force of the walking track.

[0007] Furthermore, the slide rod is provided with an anti-slip component at one end close to the first push plate. The anti-slip component is arranged on the outer side of the first push plate and protrudes from the slide rod, and is used to prevent the first push plate from slipping off the slide rod when moving on the slide rod.

[0008] Furthermore, the support rod includes a connected fixed section and a connecting section, the fixed section is connected to the guide assembly, and the connecting section is connected to the first push plate.

[0009] Furthermore, the connecting section has an external thread, the first push plate has an internal thread hole, and the connecting section is threadedly connected to the first push plate; a limiting piece is provided on the outer side of the first push plate for preventing the first push plate from rotating.

[0010] Furthermore, the fixed section includes a force-bearing portion; the force-bearing portion is truncated cone-shaped and protrudes from the rod body of the fixed section, and at least its side wall is embedded with the guide component; the guide component is formed with a recess that cooperates with the force-bearing portion.

[0011] Furthermore, the support rod further includes a guide section connected to the connecting section, and the second push plate has a guide hole for accommodating the guide section so that the guide section can move in the guide hole.

[0012] Furthermore, the wheel assembly includes a wheel frame tube, the wheel frame tube includes a first end and a second end, the first end is used to install the tensioning wheel, and the second end is abutted against the second push plate; the second end has an opening for accommodating the guide section.

[0013] Furthermore, the tensioning slideway comprises a square tube, and the square tube at least partially covers the wheel frame tube.

[0014] Furthermore, it comprises two sliding rods, the first push plate and the second push plate are rectangular and arranged opposite to each other, and the two sliding rods are arranged at the diagonals of the first push plate and the second push plate.

[0015] Furthermore, the elastic member is divided into an inner spring and an outer spring, and the outer spring is sleeved on the outer circumference of the inner spring.

[0016] Furthermore, a clamping piece is respectively provided on one side opposite to the second push plate, and the clamping piece includes an inner clamping platform and an outer clamping platform which are concentric and both circular; the inner clamping platform is higher than the outer clamping platform and has a smaller diameter than the outer clamping platform; the outer clamping platform is smaller than the inner diameter of the outer spring and is located on the inner side of the outer spring, and is used to clamp the outer spring; the inner clamping platform is smaller than the inner diameter of the inner spring and is located on the inner side of the inner spring.

[0017] To achieve the above objectives, the present application also provides a harvester, including a walking track and a track tensioning mechanism as described in any one of the above schemes.

[0018] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0019] When the user needs to disassemble the track tensioning mechanism, the first push plate can be removed from the support rod, so that the floating section can be separated from the tensioning slideway as a whole, so that the supporting force acting on the wheel assembly is released. The structure is simple, the disassembly and assembly are convenient, time-saving and labor-saving, easy to repair and maintain, more suitable for the working state of the harvester, and better adaptable to the harsh working environment. At the same time, when the harvester is traveling in the field ridge and the walking track is impacted and vibrated, the tensioning wheel transmits the impact force to the spring, and uses the energy storage characteristics of the spring to absorb the impact potential energy in time, protect the guide assembly, the adjustment assembly and related connectors, etc., absorb the vibration of the harvester as much as possible, and thus reduce the mechanical damage of the track tensioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of a partial structure of a harvester according to an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the structure of a track tensioning mechanism according to an embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the guide seat structure according to an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of the floating section structure according to an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of a track tensioning mechanism according to an embodiment of the present application;

[0026] Figure 6 This is a schematic diagram of the structure of a second push plate according to an embodiment of the present application;

[0027] Figure 7 for Figure 6 A schematic structural diagram of the second push plate from another perspective shown;

[0028] Figure 8 This is a schematic diagram of a support rod structure according to an embodiment of the present application;

[0029] Fig. 9 This is a schematic diagram of the structure of an anti-loosening plate according to an embodiment of the present application;

[0030] Fig.10 It is a partial structural schematic diagram of a wheel assembly according to an embodiment of the present application;

[0031] Fig.11 for Fig. 9 Another perspective diagram of the wheel assembly part structure shown;

[0032] Description of labels:

[0033] 100. Tensioning slideway;

[0034] 200, wheel assembly; 210, tension wheel; 220, wheel frame tube; 230, first end; 240, second end; 250, mounting seat;

[0035] 300, guide assembly; 310, notch; 320, guide seat plate; 330, first plate; 340, second plate; 350, guide sleeve;

[0036] 400, adjustment component;

[0037] 410, support rod; 411, fixed section; 412, force-bearing part; 413, connecting section; 414, guide section; 415, anti-loosening plate;

[0038] 420, floating section; 421, elastic member; 421a, inner spring; 421b, outer spring; 422, sliding rod; 422a, anti-slip member; 423, first push plate; 424, second push plate; 425, guide hole; 426, clamping member; 426a, inner clamping platform; 426b, outer clamping platform. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0041] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0042] As implementation mode 1 of this embodiment, a harvester is provided, which includes a frame, a track tensioning mechanism, a driving wheel assembly, a track roller assembly, a walking track, and a load-bearing wheel assembly. The track tensioning mechanism, the track roller assembly, the load-bearing wheel assembly, and the driving wheel assembly cooperate with the walking track, and the driving wheel transmits the driving torque of the hydraulic motor to the walking track through a gear box, and the driving wheel rotates in the walking track, thereby driving the walking track to move.

[0043] like Figure 1 As shown, the track tensioning mechanism includes a tensioning slideway 100, a wheel assembly 200, a guide assembly 300 and an adjustment assembly 400. The tensioning slideway 100 is fixed to the frame, and the wheel assembly 200, the guide assembly 300 and the adjustment assembly 400 are all installed in the tensioning slideway 100 on the chassis frame and can move along the tensioning slideway 100. The tensioning slideway 100 is used to support the wheel assembly 200, the guide assembly 300 and the adjustment assembly 400.

[0044] Specifically, the tensioning slide 100 can be a part of the frame and integrated with the frame, or can be separated from the frame, and the tensioning slide 100 is welded to the frame.

[0045] Combination Figure 1 , Figure 2 The wheel assembly 200 is movably connected to the tensioning slideway 100, and the wheel assembly 200 includes a tensioning wheel 210, which extends out of one end of the tensioning slideway 100 to support the walking track. The user can remove the wheel assembly 200 from the tensioning slideway 100, change the relative position of the wheel assembly 200 and the tensioning slideway 100, and thus change the extension length of the tensioning wheel 210 relative to the tensioning slideway 100, so as to change the tensioning force on the walking track.

[0046] Combination Figure 1 , Figure 2 The guide assembly 300 is fixed to the end of the tensioning slideway 100 away from the tensioning wheel 210, and plays a guiding and axial limiting role for the adjustment assembly 400. Specifically, the guide assembly 300 and the bottom surface of the tensioning slideway 100 are at least partially perpendicular to each other, and cooperate with each other to firmly abut and support the wheel assembly 200, so that the wheel assembly 200 provides a stable tensioning force to the walking track.

[0047] More specifically, Figure 3 As shown, the guide assembly 300 includes an L-shaped guide seat plate 320 , and the guide seat plate 320 includes a first plate 330 that is tightly attached to the bottom surface of the tensioning slide 100 and a second plate 340 that is perpendicular to the tensioning slide 100 .

[0048] Combination Figure 2 and Figure 4 The adjustment assembly 400 includes a support rod 410 and a floating section 420. One end of the support rod 410 is detachably connected to the guide assembly 300, and the other end is connected to the floating section 420. The floating section 420 includes an elastic member 421, a slide bar 422, a first push plate 423 and a second push plate 424. The two ends of the elastic member 421 abut against the first push plate 423 and the second push plate 424 respectively. The first push plate 423 and the second push plate 424 are connected by at least two slide bars 422. The first push plate 423 is slidably connected to the slide bar 422, and the second push plate 424 is fixedly connected to the slide bar 422.

[0049] Among them, Figure 5As shown, the first push plate 423 is detachably connected to the support rod 410, the second push plate 424 abuts against the wheel assembly 200, and the floating section 420 can move on the support rod 410 to change the tension of the walking track. Specifically, in the first push plate 423, the sliding rod 422 and the support rod 410 are staggered to prevent interference between the two during movement. The first push plate 423 can change the relative position between the first push plate 423 and the support rod 410, thereby changing the relative position between the floating section 420 and the support rod 410, and adjusting the tension of the walking track.

[0050] When the track tensioning mechanism receives other forces (for example, the instantaneous impact force generated by the walking track when the harvester starts, stops, suddenly accelerates, or the track collides with the ridge of the field), the tensioning wheel 210 reacts the force to the floating section 420. At this time, the first push plate 423 can move axially along the sliding rod 422, and the distance between the first push plate 423 and the second push plate 424 is shortened. The elastic member 421 absorbs potential energy, thereby alleviating the impact on other components such as the support rod 410.

[0051] As an alternative, Figure 6 As shown, the floating section 420 includes two slide bars 422, the first push plate 423 and the second push plate 424 are rectangular and arranged opposite to each other, and the two slide bars 422 are arranged at the diagonal positions of the first push plate 423 and the second push plate 424, which can effectively connect the first push plate 423 and the second push plate 424, and reserve enough space for the support rod 410 while generating a certain limit effect on it, which has a certain stability and saves costs. Specifically, the first push plate 423 and the second push plate 424 are correspondingly provided with holes for installing the slide bars 422. As other optional solutions, the slide bars 422 include 3, 4, 5 or 6, etc., which evenly surround the elastic member 421, and can effectively prevent the elastic member from moving.

[0052] As an alternative, Figure 4 As shown, the elastic member 421 is a helical cylindrical compression spring, which is clamped between the first push plate 423 and the second push plate 424, and its potential energy is more stable. The slide bar 422 is at least partially a cylindrical polished rod with a smooth surface to minimize the friction force on the surface of the slide bar 422. Preferably, the elastic member 421 is divided into an inner spring 421a and an outer spring 421b, and the outer spring 421b is sleeved on the outer periphery of the inner spring 421a to increase the durability of the spring, double safety protection, and prevent the problem of tension failure caused by the breakage of one of the springs.

[0053] Further, such as Figure 7As shown, the first push plate 423 and the second push plate 424 are respectively provided with a clamping member 426 on the opposite side thereof, which is used to limit the radial movement of the spring. If the spring and the push plate are connected by welding, the spring is prone to fatigue fracture, and if mud or damage occurs inside the spring, it is inconvenient for the user to repair or clean it. The clamping member 426 includes an inner clamping platform 426a and an outer clamping platform 426b which are concentric and both circular. The outer clamping platform 426b is smaller than the inner diameter of the outer spring 421b, and the inner clamping platform 426a is smaller than the inner diameter of the inner spring 421a; the inner clamping platform 426a is higher than the outer clamping platform 426b and has a smaller diameter than the outer clamping platform 426b. The outer clamping platform 426b is located inside the outer spring 421b and is used to clamp the outer spring 421b. The inner spring 421a is located inside the inner spring 421a and is used for the inner clamping platform 426a.

[0054] In this way, when the user needs to disassemble the track tensioning mechanism, the first push plate 423 can be removed from the support rod 410, so that the floating section 420 can be separated from the tensioning slideway 100 as a whole, so that the supporting force acting on the wheel assembly 200 is released. The structure is simple, the disassembly and assembly are convenient, time-saving and labor-saving, easy for users to inspect and maintain, more suitable for the working state of the harvester, and better adaptable to the harsh working environment. At the same time, when the harvester is traveling in the field ridge and the walking track is subjected to impact and vibration, the tensioning wheel 210 transmits the impact force to the spring, and uses the energy storage characteristics of the spring to absorb the impact potential energy in time, protect the guide assembly 300, the adjustment assembly 400 and related connecting parts, etc., absorb the vibration of the harvester as much as possible, and thus reduce the mechanical damage of the track tensioning mechanism.

[0055] As the second implementation mode of this embodiment, combined with the first implementation mode, wherein, Figure 8 As shown, the support rod 410 includes a connected fixed section 411 and a connecting section 413, the fixed section 411 is connected to the guide assembly 300, and the connecting section 413 is connected to the first push plate 423. Specifically, the connecting section 413 has an external thread, the first push plate 423 has an internal thread hole, and the connecting section 413 is threadedly connected to the first push plate 423.

[0056] Preferably, in order to facilitate the user to adjust the tension of the walking track, a limiting member is provided on the outer side of the first push plate 423 to prevent the first push plate 423 from rotating. When the user rotates the support rod 410 in a certain direction, the first push plate 423 slides on the slide bar 422 and moves away from the end of the guide assembly 300, so that the elastic member 421 is displaced or compressed, and the elastic member 421 pushes the second push plate 424, and the second push plate 424 pushes the wheel assembly 200 to increase the tension provided by the tensioning wheel 210; when the user rotates the support rod 410 in another direction, the first push plate 423 moves toward the end of the guide assembly 300, and since the tensioning wheel 210 is partially relieved of force, it can push the second push plate 424 and the elastic member 421 back to their original positions, thereby reducing the tension provided by the tensioning wheel 210.

[0057] Due to the small thread pitch, the user can adjust the tensioning force of the track tensioning mechanism on the walking track through a nearly stepless adjustment, reducing the safety hazards caused by over-tensioning and under-tensioning of the walking track.

[0058] Further, see Figure 5 The slide bar 422 is provided with an anti-slipping piece 422a at one end close to the first push plate 423. The anti-slipping piece 422a is provided on the outer side of the first push plate 423 and protrudes from the slide bar 422, and is used to prevent the first push plate 423 from slipping out of the slide bar 422 when it moves on the slide bar 422, so as to ensure the movement stability of the component. Specifically, the anti-slipping piece 422a is a flange nut, which blocks the first push plate 423. The flange nut is connected to the slide bar 422 by threads and fixed by a cylindrical elastic pin. In order to facilitate disassembly and assembly, the slide bar 422 is connected to the second push plate 424 by threads, that is, the hole for the first push plate 423 to cooperate with the slide bar 422 is a smooth light hole, and the hole for the second push plate 424 to cooperate with the slide bar 422 is a threaded hole.

[0059] Further, combined with Figure 3 and Figure 8 The fixed section 411 of the support rod 410 includes a force-bearing portion 412, which is truncated cone-shaped and protrudes from the rod body of the fixed section 411, and at least the side wall thereof is engaged with the guide assembly 300, and the guide assembly 300 is formed with a recess 310 that cooperates with the force-bearing portion 412. The side wall of the force-bearing portion 412 is the main force-bearing surface of the support rod 410, which increases the force-bearing area of ​​the guide assembly 300 and the support rod 410, and has low pressure and high wear resistance. If there is no force-bearing portion 412, the connection part between the support rod 410 and the guide assembly 300 will bear a large force, thereby causing the connection to fail, resulting in a high maintenance cost for the walking track. Specifically, the truncated cone-shaped structure of the force-bearing portion 412 is more suitable for the adjustment method of the tensioning force of the walking track in this embodiment than other table-shaped structures with edges, and will not interfere with the rotation of the support rod 410.

[0060] Specifically, combined Figure 8 and Fig. 9 The guide assembly 300 further includes a guide sleeve 350, which is fixed in the second plate 340 of the guide seat plate 320. The guide sleeve 350 can be used as a part of the second plate 340. The guide sleeve 350 forms a notch 310, and the support rod 410 passes through the guide sleeve, and its force-bearing portion 412 resists the notch 310 of the guide sleeve 350. The part of the support rod 410 passing through the guide sleeve is a hexagonal rod, and the hexagonal rod is equipped with a loose-proof plate 415 with a hexagonal hole and is clamped by a B-type pin. The second plate 340 is sandwiched between the force-bearing portion 412 and the loose-proof plate 415.

[0061] Further, combined with Figure 6 and Figure 8 The support rod 410 also includes a guide section 414 connected to the connecting section 413. The second push plate 424 has a guide hole 425 for accommodating the guide section 414 so that the guide section 414 can move in the guide hole 425. The floating section 420 is integrally mounted on the support rod 410 to further prevent deviation during the force transmission process of the elastic member 421.

[0062] Among them, Fig.10 As shown, the wheel assembly 200 includes a wheel frame tube 220, a tensioning wheel 210 and a mounting seat 250. The wheel frame tube 220 includes a first end 230 and a second end 240. The first end 230 is used to install the tensioning wheel 210, and the second end 240 is abutted against the second push plate 424; the second end 240 has an opening for accommodating the guide section 414.

[0063] Further, the tensioning slide 100 includes a square tube, which at least partially covers the wheel frame tube 220 to limit the movement of the wheel assembly 200, wherein the square tube can be used as a limiting member to limit the rotational movement of the first push plate 423.

[0064] Specifically, if Fig.11 As shown, the wheel frame tube 220 and the mounting seat 250 are welded into one body. The mounting seat is made of a plate, and reinforcing ribs are welded inside and outside to further increase the strength. The cross section of the mounting seat 250 is U-shaped, and the tensioning wheel 210 is placed in the U-shaped opening.

[0065] Specifically, the tensioning wheel 210 is installed on the mounting seat 250 by means of components such as the tensioning wheel shaft and bearings, and moves along with the wheel frame tube 220 to tension and support the walking track.

[0066] The track tensioning mechanism of the present application enables the track to maintain an appropriate degree of tightness. When the track is too loose, the elastic member 421 is reset; when the track is too tight, the elastic member 421 is compressed. At the same time, when the walking track is subjected to impact and vibration, the impact force will be transmitted to the elastic member 421 through the tensioning wheel 210. The elastic member 421 absorbs the impact energy in time by utilizing the energy storage characteristic of the elastic member 421, thereby reducing the impact on the track tensioning mechanism and other components, extending their service life, and enhancing driving comfort. At the same time, the floating section 420 forms an integral body, which can realize quick disassembly and assembly, simple structure, easy maintenance, and stable operation.

[0067] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A track tensioning mechanism for a harvester, It is characterized in that include: Tensioning slideway, fixed to the frame; A wheel assembly is movably connected to the tensioning slideway, and comprises a tensioning wheel, wherein the tensioning wheel extends out of one end of the tensioning slideway; A guide assembly, fixed to an end of the tensioning slideway away from the tensioning wheel; The adjustment assembly comprises a support rod and a floating section, wherein one end of the support rod is detachably connected to the guide assembly, and the other end is connected to the floating section; the floating section comprises an elastic member, a sliding rod, a first push plate and a second push plate, the two ends of the elastic member respectively abut against the first push plate and the second push plate, the first push plate and the second push plate are connected through at least two of the sliding rods, the first push plate is slidably connected to the sliding rod, and the second push plate is fixedly connected to the sliding rod; The first push plate is detachably connected to the support rod, the second push plate abuts against the wheel assembly, and the floating section can move on the support rod to change the tension of the walking track.

2. The track tensioning mechanism according to claim 1, Features: The slide bar is provided with an anti-slipping piece at one end close to the first push plate. The anti-slipping piece is arranged on the outer side of the first push plate and protrudes from the slide bar, and is used to prevent the first push plate from slipping off the slide bar when the first push plate moves on the slide bar.

3. The track tensioning mechanism according to claim 1, Features: The support rod includes a fixed section and a connecting section which are connected to each other. The fixed section is connected to the guide assembly, and the connecting section is connected to the first push plate.

4. The track tensioning mechanism according to claim 3, Features: The connecting section has an external thread, the first push plate has an internal thread hole, and the connecting section is threadedly connected to the first push plate; a limiting piece is provided on the outer side of the first push plate for preventing the first push plate from rotating.

5. The track tensioning mechanism according to claim 3, Features: The fixed section includes a force-bearing portion; the force-bearing portion is a truncated cone-shaped rod body protruding from the fixed section, and at least the side wall thereof is engaged with the guide component; the guide component is formed with a recess that matches the force-bearing portion.

6. The track tensioning mechanism according to any one of claims 3 to 5, Features: The support rod further includes a guide section connected to the connecting section, and the second push plate has a guide hole for accommodating the guide section so that the guide section can move in the guide hole.

7. The track tensioning mechanism according to claim 6, Features: The wheel assembly comprises a wheel frame tube, the wheel frame tube comprises a first end and a second end, the first end is used for mounting a tensioning wheel, and the second end abuts against a second push plate; The second end has an opening for receiving the guide segment.

8. The track tensioning mechanism according to claim 7, Features: The tensioning slide includes a square tube that at least partially covers the wheel carrier tube.

9. The track tensioning mechanism according to claim 1, Features: It comprises two sliding rods, the first push plate and the second push plate are rectangular and arranged opposite to each other, and the two sliding rods are arranged at the diagonal positions of the first push plate and the second push plate.

10. The track tensioning mechanism according to claim 1, Features: The elastic member is divided into an inner spring and an outer spring, and the outer spring is sleeved on the outer periphery of the inner spring.

11. The track tensioning mechanism according to claim 10, Features: A clamping piece is respectively provided on one side opposite to the second push plate, and the clamping piece includes an inner clamping platform and an outer clamping platform which are concentric and both circular; the inner clamping platform is higher than the outer clamping platform and has a smaller diameter than the outer clamping platform; the outer clamping platform is smaller than the inner diameter of the outer spring and is located on the inner side of the outer spring, and is used to clamp the outer spring; the inner clamping platform is smaller than the inner diameter of the inner spring and is located on the inner side of the inner spring.

12. A harvester, Features: It comprises a walking track and a track tensioning mechanism as described in any one of claims 1 to 11.

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