Tensioning device of walking crawler belt and combine harvester thereof

Abstract

The invention discloses a tensioning device of a walking crawler belt and a combine harvester thereof, and relates to the technical field of crawler-type harvesters, and the tensioning device comprises a mounting bracket arranged at an interval with a crawler belt body, an adjusting mechanism mounted on the mounting bracket, and a plurality of auxiliary walking assemblies mounted on the mounting bracket at intervals; the adjusting mechanism comprises a driving part, an adjusting part and a tensioning wheel, the driving part is installed on the installation support, the adjusting part is connected with the driving part, the tensioning wheel is connected with the adjusting part, the tensioning wheel can abut against the crawler belt body, and the driving part can drive the adjusting part to move; the auxiliary walking assembly can abut against the crawler belt body. The combine harvester comprises a vehicle body and a plurality of guide wheel assemblies arranged on the corresponding mounting supports at intervals, and the guide wheel assemblies are located in the crawler belt body. Tensioning adjustment can be carried out without dismounting the crawler belt body, the time for dismounting the crawler belt body is saved, and the tensioning force adjusting process is convenient and reliable.

Description

Technical Field

[0001] The present application relates to the technical field of crawler harvesters, and in particular to a tensioning device for a walking crawler and a combine harvester thereof. Background Art

[0002] Harvester is a common agricultural equipment, which is widely used in harvesting grain. Crawler harvester is a harvester that walks on crawler tracks. In the prior art, when the crawler tracks are loose, they need to be removed from the harvester and manually adjusted. When farming is very busy, disassembly and maintenance will take up a lot of time and manpower, thus making the harvester inconvenient to use. Summary of the invention

[0003] In view of this, the present application provides a tensioning device for a walking track and a combine harvester thereof, so as to solve the technical problem in the prior art that when the track is loose, it needs to be disassembled from the harvester for manual adjustment, and when farming is very busy, disassembly and maintenance will take up a lot of time and manpower, thus causing inconvenience in using the harvester.

[0004] To achieve the above object, the present invention provides the following technical solutions: A tensioning device for a walking crawler belt, comprising: A mounting bracket spaced apart from the track body; An adjustment mechanism installed on the mounting bracket, the adjustment mechanism comprising a driving component, an adjusting component and a tensioning wheel, the driving component is installed on the mounting bracket, the adjusting component is connected to the driving component, the tensioning wheel is connected to the adjusting component, the tensioning wheel can be abutted against the track body, the driving component can drive the adjusting component to move, so that the tensioning wheel tensions the track body; A plurality of auxiliary walking components are installed at intervals on the mounting bracket, and the auxiliary walking components can be pressed against the track body, thereby assisting the adjustment mechanism to tighten the track body.

[0005] Furthermore, the driving component comprises: a first electric motor mounted on the mounting bracket; a transmission assembly connected to the first motor; A screw connected between the transmission assembly and the mounting bracket; A movable seat is threadedly connected to the screw rod.

[0006] Furthermore, the adjusting component comprises: A movable plate fixed to the movable seat, wherein the movable plate is slidably matched with the mounting bracket; A slide seat is installed with the tensioning wheel, and the slide seat is slidably arranged in the mounting bracket, and the moving plate is connected between the slide seat and the moving seat.

[0007] Furthermore, the transmission assembly includes a first driving bevel gear and a second driven bevel gear meshing with each other, the first driving bevel gear is connected to the output end of the first motor, and the second driven bevel gear is connected to the screw.

[0008] Furthermore, the tensioning wheel is mounted on a first shaft, and the first shaft is connected to the sliding seat through a bearing assembly.

[0009] Furthermore, the bearing assembly includes a first bearing and a second bearing, the first bearing and the second bearing are installed in the mounting hole of the slide seat at an interval, and the first bearing is installed on the first shaft section of the first shaft, and the second bearing is installed on the second shaft section of the first shaft, the upper end of the outer ring of the second bearing abuts against the first shoulder surface of the mounting hole, the upper end of the inner ring of the second bearing abuts against the blocking plate, the lower end of the inner ring of the second bearing abuts against the second shoulder surface of the first shaft, the upper end of the inner ring of the first bearing abuts against the third shoulder surface of the first shaft, the lower end of the outer ring of the first bearing abuts against the end cover, and the end cover is fixed on the slide seat.

[0010] Furthermore, the blocking plate is fixedly connected to the second shaft segment, the fourth shoulder surface of the end cover is abutted against the lower end of the outer ring of the first bearing, and a sealing ring is provided between the end cover and the first shaft.

[0011] Furthermore, the auxiliary walking assembly includes a first support frame and walking wheels, the first support frame is connected to the mounting bracket, the walking wheels are mounted on the first support frame, and the walking wheels can be supported on the crawler body.

[0012] Furthermore, a cover plate for hiding the adjusting component is arranged on the mounting bracket, the first motor is mounted on the cover plate, a protective net cover is arranged outside the first motor, and the protective net cover is mounted on the cover plate.

[0013] The present application also provides a combine harvester, comprising a pair of the aforementioned walking track tensioning devices, and further comprising: A vehicle body, a pair of crawler bodies are relatively arranged below the vehicle body; A plurality of guide wheel assemblies are arranged at intervals on the corresponding mounting brackets, and the plurality of guide wheel assemblies are located in the corresponding track bodies.

[0014] It can be seen from the above technical solution that the advantages of the present invention are: 1. In the present application, the tensioning device is arranged on the crawler body and the mounting bracket, and is driven by an electric motor. The tensioning force can be adjusted without disassembling the crawler body, which saves time and makes it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0016] Figure 1 This is a schematic diagram of the tensioning device structure of the present application.

[0017] Figure 2 for Figure 1 A partial enlarged view of point A.

[0018] Figure 3 for Figure 1 sectional view of .

[0019] Figure 4 It is a top sectional view of the adjustment mechanism of the present application.

[0020] Figure 5 This is a schematic diagram of the structure of the mounting bracket of the present application.

[0021] Figure 6 for Figure 5 A partial enlarged view of point B.

[0022] Figure 7 This is a schematic diagram of the structure of the combine harvester of the present application.

[0023] Figure 8 for Figure 7 Schematic diagram of the structure in which the tensioning device is connected to the crawler body.

[0024] Fig. 9 for Figure 4 A partial cross-sectional view of the connection between the first shaft and the slide.

[0025] Fig.10 for Fig. 9 A partial enlarged view of .

[0026] Fig.11 for Fig. 9 Another enlarged partial view.

[0027] Fig.12 for Figure 4 A schematic structural diagram of a second embodiment of the first shaft and the slide seat.

[0028] Fig.13 for Fig.12 sectional view of .

[0029] Fig.14 for Fig.13 A magnified view of some of the structures.

[0030] Fig.15 for Fig.14 A partial enlarged view of point C.

[0031] Fig.16 for Fig.13 An enlarged view of another part of the .

[0032] Fig.17 for Fig.13 An enlarged view of the third part of .

[0033] Fig.18 This is a schematic diagram of the locking process of the locking device of the present application.

[0034] Description of reference numerals: 1-mounting bracket; 11-limiting slide groove; 12-mounting groove; 13-first screw hole; 14-through hole; 15-shaft hole; 16-guide groove; 17-mounting seat; 2-track body; 21-anti-slip strip; 3-driving sprocket; 31-second shaft; 4-auxiliary walking assembly; 41-first support frame; 42-walking wheel; 5-guide wheel assembly; 51-second support frame; 52-guide wheel; 6-tensioning wheel; 61-first shaft; 611 - second shoulder surface; 612 - first shaft section; 613 - second shaft section; 614 - third shoulder surface; 62 - slide seat; 621 - mounting hole; 6211 - first shoulder surface; 622 - base plate; 63 - end cover; 631 - fourth shoulder surface; 632 - sealing ring; 64 - first bearing; 65 - second bearing; 66 - blocking plate; 7 - cover plate; 71 - first screw; 72 - second screw hole; 8 - adjustment mechanism; 81 - first motor; 82 - first active bevel gear ;83-second driven bevel gear;84-screw;85-moving seat;86-moving plate;9-protective net cover;91-second screw;100-body;800-connecting frame;900-locking device;910-driving mechanism;911-oil cylinder;912-first connecting rod;913-second connecting rod;914-turntable;915-cam;9151-convex portion;920-box;921-box cover;922-guide plate;9221-first guide To the hole; 923-window; 930-pressing mechanism; 931-fixing plate; 932-driving block; 9321-inclined surface; 933-guide column; 940-swing locking mechanism; 941-first swing arm; 9411-first rotating wheel; 9412-second rotating wheel; 942-first compression spring; 943-second compression spring; 944-second swing arm; 9441-third rotating wheel; 9442-holding arm; 950-pressing plate; 951-second guide hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the implementation modes and the accompanying drawings. Here, the illustrative implementation modes and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

[0036] refer to Figures 1 to 6 as well as Figures 9 to 18 ,like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present embodiment provides a tensioning device for a walking track, comprising: a mounting bracket 1, an adjusting mechanism 8 and a plurality of auxiliary walking components 4, wherein the mounting bracket 1 is spaced apart from the track body 2; the adjusting mechanism 8 is mounted on the mounting bracket 1, and the adjusting mechanism 8 comprises a driving component, an adjusting component and a tensioning wheel 6, wherein the driving component is mounted on the mounting bracket 1, the adjusting component is connected to the driving component, and the adjusting component is arranged in a mounting groove 12 of the mounting bracket 1, and the tensioning wheel 6 is connected to the adjusting component, the tensioning wheel 6 can be supported on the track body 2, and the driving component can drive the adjusting component to move, thereby causing the tensioning wheel 6 to tension the track body 2; a plurality of auxiliary walking components 4 are spaced apart from each other on the mounting bracket 1, and the auxiliary walking components 4 can be pressed against the track body 2, thereby assisting the adjusting mechanism 8 in tensioning the track body 2.

[0037] In the embodiment of the present application, a plurality of annularly distributed anti-skid strips 21 are provided on both the inner and outer sides of the track body 1. The outer anti-skid strips 21 can increase the gripping ability of the track body 1, so that the track body 1 can move smoothly without slipping; the inner anti-skid strips 21 are engaged with the teeth on the tensioning wheel 6 to assist the track body 1 in moving.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown, the driving components include: a first motor 81, a transmission assembly, a screw 84 and a moving seat 85. The first motor 81 is installed on the mounting bracket 1. The first motor 81 is provided with a protective net cover 9. The protective net cover 9 is installed on the bracket 1. The protective net cover 9 can protect the first motor 81; the transmission assembly is connected to the first motor 81; the screw 84 is connected between the transmission assembly and the inner wall of the mounting groove 12; and the moving seat 85 is threadedly connected to the screw 84.

[0039] In the embodiment of the present application, the adjusting component includes: a movable plate 86 and a slide seat 62, the movable plate 86 is fixedly connected between the movable seat 85 and the slide seat 62, the slide seat 62 is slidably set in the limiting slide groove 11 of the mounting bracket 1, the limiting slide groove 11 and the mounting groove 12 are connected through the through hole 14, the movable plate 86 can slide in the through hole 14, and the two ends of the movable plate 86 extend into the limiting slide groove 11 and the mounting groove 12 respectively; a first shaft 61 is arranged in the tensioning wheel 6, and the first shaft 61 is connected to the slide seat 62 through a bearing assembly.

[0040] In the embodiment of the present application, the transmission assembly includes a first active bevel gear 82 and a second driven bevel gear 83 meshing with each other. The first active bevel gear 82 is connected to the output end of the first motor 81 , and the second driven bevel gear 83 is connected to the screw 84 .

[0041] like Fig. 9 , Fig.10 and Fig.11 As shown, the bearing assembly includes a first bearing 64 and a second bearing 65. The first bearing 64 and the second bearing 65 are installed in the mounting hole 621 of the slide seat 62 at an interval, and the first bearing 64 is installed on the first shaft segment 612 of the first shaft 61, and the second bearing 65 is installed on the second shaft segment 613 of the first shaft 61. The upper end of the outer ring of the second bearing 65 abuts against the first shoulder surface 6211 of the mounting hole 621, the upper end of the inner ring of the second bearing 65 abuts against the blocking plate 66, the lower end of the inner ring of the second bearing 65 abuts against the second shoulder surface 611 of the first shaft 61, the upper end of the inner ring of the first bearing 64 abuts against the third shoulder surface 614 of the first shaft 61, and the lower end of the outer ring of the first bearing 64 abuts against the end cover 63, and the end cover 63 is fixed on the slide seat 62.

[0042] like Fig. 9 , Fig.10 and Fig.11 As shown, the blocking plate 66 is fixedly connected to the second shaft section 613, the fourth shoulder surface 631 of the end cover 63 abuts against the lower end of the outer ring of the first bearing 64, and a sealing ring 632 is provided between the end cover 63 and the first shaft 61 to improve the sealing of the connection.

[0043] like Fig.12 and Fig.13 As shown, in order to lock the position of the slide 62, a locking device 900 is further provided on the mounting bracket 1. The locking device 900 is supported on the slide 62 to ensure that the slide 62 is securely fixed after the position is adjusted.

[0044] like Fig.13 and Fig.14As shown, the locking device 900 includes a driving mechanism 910, a box body 920, a pressing mechanism 930, a pair of swing locking mechanisms 940 and a pressing plate 950. The box body 920 is installed on the mounting bracket 1, and the driving mechanism 910 is installed between the mounting seat 17 set on the mounting bracket 1 and the box body 920; the mounting seat 17 and the box body 920 are spaced apart, and the driving mechanism 910 extends into the box body 920; a guide plate 922 is provided in the box body 920, and the pressing mechanism 930 slides with the guide plate 922; a pair of swing locking mechanisms 940 are symmetrically arranged in the box body 920, and abut against the two ends of the pressing mechanism 930; the pressing plate 950 is slidably arranged in the guide groove 16 of the mounting bracket 1, and the driving mechanism 910 can drive the pressing mechanism 930 to move downward, so that the pair of swing locking mechanisms 940 swing and squeeze the pressing plate 950, so that the pressing plate 950 abuts against the slide 62 to fix the slide 62.

[0045] Preferably, a detachable box cover 921 is installed on the box body 920 to facilitate installation or maintenance of parts inside the box body 920 .

[0046] like Fig.14 and Fig.15 As shown, the driving mechanism 910 includes: a cylinder 911, a first connecting rod 912, a second connecting rod 913, a turntable 914 and a cam 915. The rear end of the cylinder 911 is hinged on the mounting seat 17; the first connecting rod 912 is connected to the output end of the cylinder 911; the second connecting rod 913 is hinged on the first connecting rod 912; the turntable 914 and the cam 915 are coaxially pivoted in the box body 920, and the turntable 914 and the cam 915 are coaxially fixed together, the turntable 914 is installed on the end of the second connecting rod 913 away from the first connecting rod 912, and a window 923 is opened on the side of the box body 920 close to the mounting seat 17, the first connecting rod 912 extends into the box body 920 through the window 923, and the cam 915 can be supported on the fixed plate 931 of the pressing mechanism 930.

[0047] like Fig.15 , Fig.16 and Fig.17 As shown, the pressing mechanism 930 includes: a fixed plate 931, a pair of driving blocks 932 and a pair of guide pillars 933, the pair of driving blocks 932 are symmetrically connected at both ends of the fixed plate 931; the pair of driving blocks 932 can slide in the first guide hole 9221 opened in the middle of the guide plate 922; a pair of guide pillars 933 are connected to the lower end of the fixed plate 931 at intervals, and the pair of guide pillars 933 are slidably matched with a pair of second guide holes 951 opened on the pressing plate 950.

[0048] Preferably, the lower end of the driving block 932 has an inclined surface 9321 , and the inclined surface 9321 can abut against the first rotating wheel 9411 of the swing locking mechanism 940 .

[0049] like Fig.16 As shown, the swing locking mechanism 940 includes: a first swing arm 941, a second swing arm 944, a first compression spring 942 and a second compression spring 943. The first swing arm 941 and the second swing arm 944 are relatively pivoted in the box body 920; one end of the first swing arm 941 abuts against the inclined surface 9321, and the other end abuts against the second swing arm 944, and the other end of the second swing arm 944 abuts against the pressure plate 950. The first compression spring 942 is connected between the guide plate 922 and the first swing arm 941; the second compression spring 943 is connected between the guide plate 922 and the second swing arm 944.

[0050] Preferably, a first rotating wheel 9411 is installed at one end of the first swing arm 941, and a second rotating wheel 9412 is installed at the other end. The first rotating wheel 9411 is abutted against the inclined surface 9321, and the second rotating wheel 9412 is abutted against the abutting arm 9442 of the second swing arm 944. The second compression spring 943 is connected between the guide plate 922 and the abutting arm 9442.

[0051] Preferably, a third rotating wheel 9441 is installed on one end of the second swing arm 944 away from the supporting arm 9442 , and the third rotating wheel 9441 is supported on the pressing plate 950 .

[0052] like Fig.17 As shown, a base plate 622 is disposed on the slide seat 62 , and the pressing plate 950 can be supported on the base plate 622 to fix the slide seat 62 .

[0053] In the present application examples, reference Fig.14 , Fig.15 , Fig.16 , Fig.17 and Fig.18 In the initial state, the convex portion 9151 of the cam 915 is located at the upper left position of the fixed plate 931. When locked, the oil cylinder 911 is started, and the piston rod of the oil cylinder 911 drives the first connecting rod 912 to make the second connecting rod 913 rotate counterclockwise, so the turntable 914 and the cam 915 also rotate counterclockwise, and the convex portion 9151 of the cam 915 squeezes the fixed plate 931 to move downward, and the fixed plate 931 drives a pair of driving blocks 932 and a pair of guide pillars 933 to move downward, and the inclined surface 9321 squeezes the first rotating wheel 9411, so that the second rotating wheel 9411 is rotated counterclockwise. A swing arm 941 rotates clockwise (the first compression spring 942 is compressed), so the second rotating wheel 9412 swings upward, pressing the supporting arm 9442, causing the second swing arm 944 to rotate counterclockwise (the second compression spring 943 is compressed). At the same time, the third rotating wheel 9441 swings downward to squeeze the pressure plate 950 to move downward. After the pressure plate 950 moves downward, it squeezes the base plate 622. When the high point of the protrusion 9151 rotates to the position directly above the fixed plate 931, the base plate 622 firmly fixes the slide seat 62 in the limiting slide groove 11.

[0054] When it is necessary to adjust the tension of the track body 2 through the adjustment mechanism 8, the cylinder 911 is started to retract, the piston rod drives the first connecting rod 912 to make the second connecting rod 913 rotate clockwise, and the protrusion 9151 of the cam 915 rotates a certain angle. Under the reset action of the first compression spring 942 and the second compression spring 943, the fixed plate 931, a pair of driving blocks 932, the first swing arm 941 and the second swing arm 944 are all reset, and the lock on the slide 62 is released, and then the tension of the track body 2 can be adjusted.

[0055] After the tension of the crawler body 2 is adjusted by the adjustment mechanism 8, the slide 62 is then locked by the locking device 900. The locking device 900 can keep the state of the slide 62 fixed, thereby keeping the tension of the crawler body 2 stable.

[0056] like Figure 1 As shown, the auxiliary walking assembly 4 includes a first support frame 41 and a walking wheel 42. The first support frame 41 is connected to the mounting bracket 1, and the walking wheel 42 is mounted on the first support frame 41. The walking wheel 42 is abutted against the inner side of the track body 2. The walking wheel 42 abuts against the track body 2, so that the walking wheel 42 can have a pressing effect on the track body 1. When combined with the adjustment mechanism 8, it has an auxiliary tensioning effect.

[0057] like Figure 2 , Figure 3 and Figure 4 As shown, a cover plate 7 for hiding the adjusting component is provided on the mounting bracket 1, and a protective net cover 9 is mounted on the cover plate 7 by a plurality of second screws 91. The first motor 81 is accommodated in the protective net cover 9.

[0058] like Figure 5 and Figure 6 As shown, an axial hole 15 is opened at the right end of the mounting bracket 1, and a plurality of first screw holes 13 are opened at the left end of the mounting bracket 1. The plurality of first screw holes 13 are distributed on the periphery of the mounting groove 12. The cover plate 7 is installed on the mounting bracket 1 by means of a first screw 71, and a plurality of second screw holes 72 are opened on the cover plate 7.

[0059] refer to Figures 7 and 8 ,like Figure 7 and Figure 8 As shown, this embodiment also provides a combine harvester, including a pair of tensioning devices for walking tracks (hereinafter referred to as tensioning devices), a vehicle body 100 and a plurality of guide wheel assemblies 5, a pair of track bodies 2 are relatively arranged below the vehicle body 100, a connecting frame 800 is arranged below the vehicle body 100, and a mounting bracket 1 is connected to the connecting frame 800; a plurality of guide wheel assemblies 5 are arranged at intervals on corresponding mounting brackets 1 and extend into the track body 2, and the guide wheel assemblies 5 can provide guidance for the walking of the track body 2.

[0060] Preferably, a drive sprocket 3 is provided in the track body 2, and the drive sprocket 3 is connected to the mounting bracket 1 through a second shaft 31. The tensioning wheel 6 is provided in the track body 2 at the other end opposite to the corresponding drive sprocket 3, and the tensioning wheel 6 cooperates with the drive sprocket 3 to enable the track body 2 to move.

[0061] In the embodiment of the present application, the guide wheel assembly 5 includes a second support frame 51 and a guide wheel 52. The second support frame 51 is installed on the corresponding mounting bracket 1, and the guide wheel 52 is installed on the second support frame 51. The guide wheel 52 is supported on the inner side of the crawler body 2 and can provide support and guidance.

[0062] In the embodiment of the present application, the first active bevel gear 82 can drive the second driven bevel gear 83 to rotate by starting the first motor 81, and the second driven bevel gear 83 is connected to the screw 84, so the screw 84 rotates to make the moving seat 85 drive the moving plate 86 and the slide 62 to move left and right in the horizontal direction, so the tension wheel 6 moves left and right under the drive of the slide 62. When the tension wheel 6 moves to the left, the tension wheel 6 is close to the track body 2 and away from the drive sprocket 3, so the tensioning force increases; conversely, when the tension wheel 6 moves to the right, the tension wheel 6 is away from the track body 2 and close to the drive sprocket 3, so the tensioning force decreases. Therefore, by working the adjustment mechanism 8, in cooperation with the drive sprocket 3, the tension on the track body 2 can be adjusted, so that the track body 2 can work stably.

[0063] In summary, the present application can achieve the effect of tension adjustment without disassembling the track body 2, which not only saves the time for installing and disassembling the track body 2, but also makes the tension adjustment process convenient and reliable, thereby making the harvester easy to use.

[0064] 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 embodiments of 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 tensioning device for a walking track, characterized in that: include: A mounting bracket (1) spaced apart from the crawler body (2); an adjusting mechanism (8) mounted on the mounting bracket (1), the adjusting mechanism (8) comprising a driving component, an adjusting component and a tensioning wheel (6), the driving component being mounted on the mounting bracket (1), the adjusting component being connected to the driving component, the tensioning wheel (6) being connected to the adjusting component, the tensioning wheel (6) being capable of abutting against the track body (2), the driving component being capable of driving the adjusting component to move, thereby causing the tensioning wheel (6) to tension the track body (2); A plurality of auxiliary walking assemblies (4), wherein the plurality of auxiliary walking assemblies (4) are installed at intervals on the mounting bracket (1), and the auxiliary walking assemblies (4) can be pressed against the crawler body (2), thereby assisting the adjustment mechanism (8) in tensioning the crawler body (2).

2. The tensioning device for the walking track according to claim 1, characterized in that: The driving component comprises: A first electric motor (81) mounted on the mounting bracket (1); a transmission assembly connected to the first motor (81); A screw rod (84) connected between the transmission assembly and the mounting bracket (1); A movable seat (85) threadedly connected to the screw rod (84).

3. The tensioning device for the walking track according to claim 2, characterized in that: The adjusting component comprises: a movable plate (86) fixed to the movable seat (85), wherein the movable plate (86) is slidably matched with the mounting bracket (1); A slide seat (62) is mounted on the tension wheel (6), and the slide seat (62) is slidably arranged in the mounting bracket (1), and the movable plate (86) is connected between the slide seat (62) and the movable seat (85).

4. The tensioning device for the walking track according to claim 2, characterized in that: The transmission assembly comprises a first driving bevel gear (82) and a second driven bevel gear (83) meshing with each other, the first driving bevel gear (82) being connected to the output end of the first motor (81), and the second driven bevel gear (83) being connected to the screw rod (84).

5. The tensioning device for the walking track according to claim 3, characterized in that: The tension wheel (6) is mounted on a first shaft (61), and the first shaft (61) is connected to the slide seat (62) via a bearing assembly.

6. The tensioning device for the walking track according to claim 5, characterized in that: The bearing assembly comprises a first bearing (64) and a second bearing (65), wherein the first bearing (64) and the second bearing (65) are installed in a mounting hole (621) of the slide seat (62) at an interval, and the first bearing (64) is installed on a first shaft section (612) of the first shaft (61), and the second bearing (65) is installed on a second shaft section (613) of the first shaft (61), and an upper end of an outer ring of the second bearing (65) abuts against the mounting hole (621). 1), the upper end of the inner ring of the second bearing (65) abuts against the blocking plate (66), the lower end of the inner ring of the second bearing (65) abuts against the second shoulder surface (611) of the first shaft (61), the upper end of the inner ring of the first bearing (64) abuts against the third shoulder surface (614) of the first shaft (61), the lower end of the outer ring of the first bearing (64) abuts against the end cover (63), and the end cover (63) is fixed on the slide seat (62).

7. The tensioning device for the walking track according to claim 6, characterized in that: The blocking plate (66) is fixedly connected to the second shaft section (613), the fourth shoulder surface (631) of the end cover (63) abuts against the lower end of the outer ring of the first bearing (64), and a sealing ring (632) is provided between the end cover (63) and the first shaft (61).

8. The tensioning device for the walking track according to claim 1, characterized in that: The auxiliary walking assembly (4) comprises a first support frame (41) and a walking wheel (42); the first support frame (41) is connected to the mounting bracket (1); the walking wheel (42) is mounted on the first support frame (41); and the walking wheel (42) is capable of abutting against the crawler body (2).

9. The tensioning device for the walking track according to claim 2, characterized in that: The mounting bracket (1) is provided with a cover plate (7) for hiding the adjusting component, the first motor (81) is mounted on the cover plate (7), a protective net cover (9) is provided outside the first motor (81), and the protective net cover (9) is mounted on the cover plate (7).

10. A combine harvester, comprising a pair of tensioning devices for walking tracks according to any one of claims 1 to 9, characterized in that: Also includes: A vehicle body (100), a pair of crawler bodies (2) arranged relatively below the vehicle body (100); A plurality of guide wheel assemblies (5) are arranged at intervals on the corresponding mounting brackets (1), and the plurality of guide wheel assemblies (5) are located in the corresponding crawler body (2).

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