CN220096490U - Chassis for field operation vehicle for high-stalk crops - Google Patents

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a chassis for a field operation vehicle for high-pole crops, which comprises a frame, a first crawler running mechanism and a second crawler running mechanism which is arranged at intervals relative to the first crawler running mechanism left and right; the left side of the frame and the right side of the frame are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame of the first crawler travelling mechanism and one side of a wheel frame of the second crawler travelling mechanism so as to form an avoidance space for high-pole crops to pass through under the frame; the frame is fixedly provided with a first rotary driving device and a second rotary driving device, the output end of the first rotary driving device is connected with the driving wheel of the first crawler traveling mechanism, and the output end of the second rotary driving device is connected with the driving wheel of the second crawler traveling mechanism through chain transmission, so that the wheel rail is narrow, the ground clearance of the frame is high, and the use requirement of the high-pole crop field operation vehicle is met.

Description

Chassis for field operation vehicle for high-stalk crops

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to a chassis for a field operation vehicle for high-pole crops.

Background

At present, the field passing performance of field management machinery on high-stalk close-planted crops such as pineapple, corn, tobacco and the like is generally poor, after the crops grow up, the agricultural machinery walks among the crops to easily damage the crops, and meanwhile, the forward resistance is increased, wherein the important reasons are that the ground clearance of a frame of an agricultural chassis is smaller and the wheel track is wider. The lower ground clearance of the frame can cause that the chassis can not pass through the top of the high-stalk crops, and is not suitable for field management operation in the middle and later stages of the high-stalk crops; the wider wheel track walks between the ridges and is easy to crush and collide with crops, so that loss is caused.

Therefore, there is a need for a chassis for a field work vehicle having a frame with a high ground clearance and a narrow wheel rail.

Disclosure of Invention

The utility model aims to provide a chassis for a high-pole crop field operation vehicle, which is narrower in wheel rail and higher in ground clearance of a frame.

The chassis for the field operation vehicle for the high-pole crops comprises a frame (1), a first crawler traveling mechanism and a second crawler traveling mechanism which is arranged opposite to the first crawler traveling mechanism in a left-right opposite and spaced manner; the left side of the frame and the right side of the frame are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame of the first crawler travelling mechanism and one side of a wheel frame of the second crawler travelling mechanism so as to form an avoidance space for high-pole crops to pass through below the frame;

the frame is fixedly provided with a first rotary driving device and a second rotary driving device, and the output end of the first rotary driving device is connected with the driving wheel of the first crawler traveling mechanism and the output end of the second rotary driving device is connected with the driving wheel of the second crawler traveling mechanism in a chain transmission manner.

As a preferable scheme, the driving wheel of the first crawler traveling mechanism is connected with a first sprocket in a rotation stopping way, the output end of the first rotary driving device is connected with a second sprocket which is correspondingly arranged with the first sprocket, the first sprocket is in transmission connection with the second sprocket through a first chain, and the first sprocket, the second sprocket and the first chain are arranged at intervals relative to the supporting part on the left side of the frame.

As a preferable scheme, a connecting plate is fixed at the position of the lower end of the frame, which is opposite to the left and right of the first sprocket, a spacing roller is rotatably connected to the middle part of the connecting plate, the spacing roller is arranged in the space between the first sprocket and the second sprocket, and the spacing roller is positioned in the annular space surrounded by the first chain;

the connecting plate is provided with a tensioning mechanism for tensioning the first chain, and the tensioning mechanism and the interval rollers are arranged at intervals.

Preferably, the tensioning mechanism comprises a first pressing plate, a second pressing plate and a tension spring; the upper part of the connecting plate is fixedly connected to the frame, and the first pressing plate and the second pressing plate are oppositely arranged on the front side and the rear side of the first chain by taking a connecting line of the centers of the first chain wheel and the second chain wheel as the center;

the first clamp plate orientation one side of first chain with the second clamp plate orientation one side of first chain all is equipped with the arcwall face, the first end of first clamp plate with the first end of second clamp plate all rotates to be connected on the connecting plate, extension spring's both ends are connected respectively the second end of first clamp plate with the second end of second clamp plate, so that the second end of first clamp plate with the second end of second clamp plate is close to each other, makes the arcwall face of first clamp plate with the arcwall face of second clamp plate all pushes up respectively the front side and the rear side of first chain.

As a preferable scheme, the frame is fixed with a first sub-blade at the front of the first crawler running mechanism and the front of the second crawler running mechanism, each first sub-blade is provided with a first accommodating groove with an opening facing backwards, and the front of the first crawler running mechanism and the front of the second crawler running mechanism are respectively positioned in the corresponding first accommodating grooves.

As a preferable scheme, the rear of the wheel frame of the first crawler traveling mechanism and the rear of the wheel frame of the second crawler traveling mechanism are both connected with second sub-blades, the second sub-blades are provided with second accommodating grooves with forward openings, and the rear of the first crawler traveling mechanism and the rear of the second crawler traveling mechanism are respectively positioned in the corresponding second accommodating grooves.

As the preferred scheme, chassis for high-pole crop field operation car includes the control box, the upper portion of frame is equipped with and is used for the detachable connection the first fixed position of control box, the front end of frame is equipped with and is used for the detachable connection the second fixed position of control box.

Preferably, the first rotary driving device and the second rotary driving device are hydraulic motors, the liquid inlet ends of the hydraulic motors are connected with hydraulic pumps, the hydraulic pumps are fixed on the frame, and the frame is also fixed with a gasoline engine in transmission connection with an input shaft of the hydraulic pumps.

Preferably, the supporting part comprises at least two upright posts which are arranged at intervals in the front-back direction, and each upright post is arranged at intervals in the front-back direction;

the chassis for the field operation vehicle for the high-pole crops comprises hydraulic oil tanks, wherein a rectangular installation space is formed by surrounding the two front and rear adjacent upright posts, the first crawler travelling mechanism and the frame, the width of each hydraulic oil tank is smaller than or equal to that of a crawler of the first crawler travelling mechanism, and the hydraulic oil tanks are arranged in the rectangular installation space.

Preferably, the chassis for the high-pole crop field operation vehicle comprises a radiator for radiating hydraulic oil, and the radiator is fixed on the frame.

Compared with the prior art, the utility model has the beneficial effects that:

the chassis for the field operation vehicle for the high-pole crops comprises a frame, a first crawler travelling mechanism and a second crawler travelling mechanism which is arranged opposite to the first crawler travelling mechanism at a left-right opposite interval; the left side of the frame and the right side of the frame are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame of the first crawler travelling mechanism and one side of a wheel frame of the second crawler travelling mechanism so as to form an avoidance space for high-pole crops to pass through under the frame; the travelling mechanism of the chassis is arranged in a crawler type, and the contact area between the crawler type travelling mechanism and the ground is large, so that the width of the crawler can be narrower relative to the wheel type structure; the frame is fixedly provided with a first rotary driving device and a second rotary driving device, the output end of the first rotary driving device is connected with the driving wheel of the first crawler traveling mechanism, and the output end of the second rotary driving device is connected with the driving wheel of the second crawler traveling mechanism in a chain transmission manner, so that the transmission distance applicable to the chain transmission manner is longer, and the ground clearance of the frame is higher due to the fact that the supporting part is higher, therefore, the wheel rail of the chassis for the high-pole crop field operation vehicle can be narrower, and the frame can have higher ground clearance, and meets the use requirement of the high-pole crop field operation vehicle.

Drawings

FIG. 1 is a schematic view of the chassis for a field operation vehicle for high-pole crops, according to the present utility model, when a console box is provided at the upper end of a frame;

FIG. 2 is a schematic view of the chassis for the field operation vehicle for high-pole crops of the present utility model when the control box is disposed at the front end of the frame;

FIG. 3 is a schematic diagram of an arrangement position of a heat sink;

FIG. 4 is a schematic view of a transmission between a first sprocket and a second sprocket;

FIG. 5 is a schematic structural view of a first crawler travel mechanism;

in the figure, 1, a frame; 21. a first crawler travel mechanism; 211. a wheel carrier; 212. a driving wheel; 213. a track; 214. a floating thrust wheel; 215. fixing a thrust wheel; 216. a tensioning wheel; 22. a second crawler travel mechanism; 23. a column; 31. a first rotary driving device; 32. a hydraulic oil tank; 41. a first sprocket; 42. a second sprocket; 43. a first chain; 44. spacing rollers; 51. a connecting plate; 52. a first platen; 53. a second pressing plate; 54. a tension spring; 61. a first louver; 62. a second louver; 7. a control box; 8. a gasoline engine; 91. an electric control box; 92. a seat; 93. a heat sink.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model.

As shown in fig. 1 to 5, a preferred embodiment of a chassis for a field operation vehicle for high-pole crops according to the present utility model includes a frame 1, a first crawler travel mechanism 21, and a second crawler travel mechanism 22 arranged in a laterally opposed and spaced relation to the first crawler travel mechanism 21; the left side of the frame 1 and the right side of the frame 1 are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame 211 of the first crawler traveling mechanism 21 and one side of a wheel frame of the second crawler traveling mechanism 22 so as to form an avoidance space for high-pole crops to pass through under the frame 1; the travelling mechanism of the chassis is arranged in a crawler type, and the contact area between the crawler type travelling mechanism and the ground is large, so that the width of the crawler can be narrower relative to the wheel type structure; the frame 1 is fixed with a first rotary driving device 31 and a second rotary driving device, and the output end of the first rotary driving device 31 is connected with the driving wheel 212 of the first crawler belt running mechanism 21, and the output end of the second rotary driving device is connected with the driving wheel of the second crawler belt running mechanism 22 in a chain transmission way. The transmission distance that chain drive's mode can be suitable for is longer, therefore can make frame 1's clearance that leaves the ground higher with the higher of supporting part setting, so, the wheel track of the chassis for the high-pole crop field operation car of this embodiment can set up narrower and the frame can have higher clearance that leaves the ground, has satisfied the operation requirement of high-pole crop field operation car. Specifically, the frame plane is formed at the upper end of the frame, and a plurality of functional component connecting seats and functional component connecting holes are formed at the upper part of the frame, so that the field management operation functional components are convenient to be externally connected, and the universality is good. The first crawler traveling mechanism 21, the supporting part, the frame and the second crawler traveling mechanism 22 enclose into a door-shaped structure, the first crawler traveling mechanism 21 and the second crawler traveling mechanism 22 are both narrow crawler traveling mechanisms, the whole structure of the chassis for the high-stalk crop field operation vehicle of the embodiment is compact, the whole power transmission and the structure mode effectively control the transverse width of the whole power driving transmission device, and the whole width of the traveling part between the rows and ridges of the chassis is narrow, thereby enhancing the field trafficability of the chassis to the high-stalk close-planted crops.

The driving wheel 212 of the first crawler belt running mechanism 21 is connected with a first sprocket 41 in a rotation stopping manner, the output end of the first rotation driving device 31 is connected with a second sprocket 42 which is correspondingly arranged with the first sprocket 41 in a rotation stopping manner, the first sprocket 41 is in transmission connection with the second sprocket 42 through a first chain 43, and the first sprocket 41, the second sprocket 42 and the first chain 43 are arranged at intervals relative to the front and the rear of a supporting part positioned on the left side of the frame 1. The connection between the second rotary drive and the second crawler travel mechanism 22 is similar to the connection between the first crawler travel mechanism 21 and the first rotary drive 31; the chain transmission structure is arranged in front of the supporting part, so that the influence of the chain transmission structure on the width of the chassis is avoided, and the whole chassis is compact in structure.

In this embodiment, as shown in fig. 4, a connecting plate 51 is fixed at a position of the lower end of the frame 1 opposite to the left and right of the first sprocket 41, a spacing roller 44 is rotatably connected to the middle part of the connecting plate 51, the spacing roller is arranged in a space between the first sprocket 41 and the second sprocket 42, and the spacing roller is located in an annular space surrounded by the first chain 43; the connecting plate 51 is provided with a tensioning mechanism for tensioning the first chain 43, and the tensioning mechanism is arranged at intervals from the interval roller 44. The setting of straining device is convenient for adjust and convenient to detach or installation first chain 43 to first chain 43's tensioning degree, and the setting of interval gyro wheel 44 can avoid longer first chain 43 when the tensioning, and the tight limit of first chain takes place to interfere with the loose edge.

Specifically, the tensioning mechanism includes a first platen 52, a second platen 53, and an extension spring 54; the upper part of the connecting plate 51 is fixedly connected to the frame 1, and the first pressing plate 52 and the second pressing plate 53 are oppositely arranged on the front side and the rear side of the first chain 43 by taking the connecting line of the centers of the first chain wheel 41 and the second chain wheel 42 as the center; the side of the first pressing plate 52 facing the first chain 43 and the side of the second pressing plate 53 facing the first chain 43 are respectively provided with an arc surface, the first end of the first pressing plate 52 and the first end of the second pressing plate 53 are respectively connected to the connecting plate 51 in a rotating manner, and two ends of the tension spring 54 are respectively connected with the second end of the first pressing plate 52 and the second end of the second pressing plate 53, so that the second end of the first pressing plate 52 and the second end of the second pressing plate 53 are close to each other, and the arc surfaces of the first pressing plate 52 and the arc surface of the second pressing plate 53 respectively push against the front side and the rear side of the first chain 43. When the first chain 43 rotates forward or reversely, the first pressing plate 52 and the second pressing plate 53 always have a loose edge pressed on the first chain 43, so that the forward and reverse rotation automatic tensioning of the first chain 43 is realized, and the distance between the second end of the first pressing plate 52 and the second end of the second pressing plate 53 is automatically adjusted through the tension spring 54, so that the loose edge lengthening of the first chain 43 caused by abrasion is automatically compensated. And the first pressing plate 52 and the second pressing plate 53 can synchronously rotate, so that the phenomenon of loose edges and jumping teeth is avoided, meanwhile, the damping impact of the first pressing plate 52 and the second pressing plate 53 in rotation is small, and the stability of chain transmission is ensured.

In this embodiment, the frame 1 is fixed with the first sub-blades 61 at the front of the first crawler 21 and the front of the second crawler 22, and each first sub-blade 61 is provided with a first accommodation groove with a rearward opening, and the front of the first crawler 21 and the front of the second crawler 22 are respectively located in the corresponding first accommodation groove. The second separating plate 62 is connected to the rear of the wheel frame 211 of the first crawler traveling mechanism 21 and the rear of the wheel frame of the second crawler traveling mechanism 22, and the second separating plate 62 is provided with a second accommodation groove with a forward opening, and the rear of the first crawler traveling mechanism 21 and the rear of the second crawler traveling mechanism 22 are respectively located in the corresponding second accommodation grooves. When the high-stalk close-planted crops advance or retreat between the rows, the first and second blades 61 and 62 can separate the blades for sealing, so that the blades are prevented from being rolled by the crawler belt, and the field trafficability of the whole high-ground-clearance narrow crawler belt chassis is good. Specifically, a fixing rod horizontally arranged along the left-right direction is disposed at the rear of the wheel frame 211 of the first crawler belt running mechanism 21, and the front two sides of the accommodating groove of the second bifurcation plate 62 are respectively fixed at the left end and the right end of the fixing rod, and in other embodiments of the present utility model, the second bifurcation plate 62 may be fixed at the lower part of the frame.

For convenient operation, in this embodiment, chassis for high-pole crop field operation car includes control box 7, and the upper portion of frame 1 is equipped with the first fixed position that is used for the detachable connection control box 7, and the front end of frame 1 is equipped with the second fixed position that is used for the detachable connection control box 7. The control box 7 can be selectively arranged on the frame 1 or in front of the frame 1 according to the operation requirement, so that the flexible control on the machine or under the machine is realized. Specifically, when the control box 7 is connected to the first fixed position through a bolt, the control on the machine is realized, and the control requirements of safe, high-speed and efficient machine spraying and fertilizing are met. When the control box 7 is connected to the second fixed position in front of the frame 1 through bolts, the following type control under the machine is realized, and the following type picking and transporting operation machine lower control requirement is met. The flexible override mode can adapt to various operation demands, can realize flexible control in complicated topography of south hilly mountain region, little field piece, and operating efficiency is high.

In this embodiment, the first rotary driving device 31 and the second rotary driving device are hydraulic motors, the liquid inlet ends of the hydraulic motors are connected with hydraulic pumps, the hydraulic pumps are fixed on the frame 1, and the frame 1 is also fixed with a gasoline engine 8 in transmission connection with the input shaft of the hydraulic pump. Specifically, the gasoline engine is connected with the hydraulic pump in a belt transmission mode, an oil outlet of the hydraulic pump is connected with two hydraulic motors, and the two hydraulic motors are respectively used as a first rotary driving device and a second rotary driving device. In this embodiment, the oil outlet end of the hydraulic pump is further connected with a reserved interface for connecting with working devices such as spraying and fertilizing, and the like, and the single gasoline engine 8 can drive a plurality of hydraulic motors to act, so as to drive the working devices and drive the first crawler running mechanism 21 and the second crawler running mechanism 22.

In this embodiment, the supporting portion includes at least two columns 23 arranged at intervals in the front-rear direction, and each column 23 is arranged at intervals in the front-rear direction; the chassis for the high-pole crop field operation vehicle comprises a hydraulic oil tank 32, a rectangular installation space is enclosed between two upright posts 23, a first crawler traveling mechanism 21 and a frame 1, which are adjacent in front and back, the width of the hydraulic oil tank 32 is smaller than or equal to the width of a crawler 213 of the first crawler traveling mechanism 21, and the hydraulic oil tank 32 is arranged in the rectangular installation space. In this embodiment, the hydraulic driving system includes an electric cabinet 91, a solenoid valve assembly and a flow control servo motor, one end of the solenoid valve assembly is connected with the hydraulic pump, and the other end of the solenoid valve assembly is connected with an external operation functional component. The flow control servo motor is connected with the hydraulic pump. The man-machine interaction information is sent to the electric cabinet 91 through the control box 7, the electric cabinet 91 controls the external operation functional component through the electromagnetic valve component, and meanwhile, the hydraulic driving system is controlled to drive the chassis to walk and steer through the flow control servo motor.

The electric cabinet 91 is provided in another rectangular installation space, thereby making the mechanism of the chassis for the high-pole crop field operation vehicle of the present embodiment more compact.

In this embodiment, the chassis for the field operation vehicle for high-pole crops includes a radiator 93 for radiating hydraulic oil, the radiator 93 is fixed on the frame 1, and the frame 1 is further provided with a seat 92.

As shown in fig. 5, the first crawler travel mechanism 21 of the present embodiment includes; the crawler belt comprises a wheel frame 211, a driving wheel 212, a crawler belt 213, floating thrust wheels 214, fixed thrust wheels 215 and tensioning wheels 216, wherein a plurality of groups of fixed thrust wheels 215 are arranged, the fixed thrust wheels 215 are arranged below the wheel frame 211, a plurality of groups of floating thrust wheels 214 are arranged, and the floating thrust wheels 214 are hinged below the crawler belt wheel frame 211 in a herringbone structure. The drive wheel 212 is in driving connection with the first chain 43. The tension pulley 216 is disposed behind the wheel frame 211. The crawler belt 213 is sleeved outside the crawler belt wheel train, and in this embodiment, the width of the crawler belt 213 is not greater than 13cm. The width of the entire train is no greater than the width of the tracks 213. The stand 23 comprises a sleeve fixedly connected to the lower end of the frame 1 and a mandrel fixedly connected to the outer side of the wheel frame 211, the sleeve is detachably connected with the mandrel, and the mandrel is connected with the stand from one side of the wheel frame 211, so that the width of the whole first crawler travelling mechanism 21 is effectively controlled.

In summary, the chassis for the field operation vehicle for the high-pole crops comprises a frame 1, a first crawler traveling mechanism 21 and a second crawler traveling mechanism 22 which is oppositely arranged at intervals on the left and right sides of the first crawler traveling mechanism 21; the left side of the frame 1 and the right side of the frame 1 are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame 211 of the first crawler traveling mechanism 21 and one side of a wheel frame of the second crawler traveling mechanism 22 so as to form an avoidance space for high-pole crops to pass through under the frame 1; the travelling mechanism of the chassis is arranged in a crawler type, and the contact area between the crawler type travelling mechanism and the ground is large, so that the width of the crawler can be narrower relative to the wheel type structure; the frame 1 is fixed with a first rotary driving device 31 and a second rotary driving device, and the output end of the first rotary driving device 31 is connected with the driving wheel 212 of the first crawler belt running mechanism 21, and the output end of the second rotary driving device is connected with the driving wheel of the second crawler belt running mechanism 22 in a chain transmission way. The transmission distance that chain drive's mode can be suitable for is longer, therefore can make frame 1's clearance that leaves the ground higher with the higher of supporting part setting, so, the wheel track of the chassis for the high-pole crop field operation car of this embodiment can set up narrower and the frame can have higher clearance that leaves the ground, has satisfied the operation requirement of high-pole crop field operation car.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. The chassis for the field operation vehicle for the high-pole crops is characterized by comprising a frame (1), a first crawler traveling mechanism (21) and a second crawler traveling mechanism (22) which is oppositely arranged at intervals on the left side and the right side of the first crawler traveling mechanism (21); the left side of the frame (1) and the right side of the frame (1) are respectively provided with a supporting part extending vertically downwards, and the lower ends of the supporting parts are respectively and fixedly connected with one side of a wheel frame (211) of the first crawler traveling mechanism (21) and one side of a wheel frame of the second crawler traveling mechanism (22) so as to form an avoidance space for high-pole crops to pass through under the frame (1);

the frame (1) is fixedly provided with a first rotary driving device (31) and a second rotary driving device, and the output end of the first rotary driving device (31) is connected with the driving wheel (212) of the first crawler traveling mechanism (21) and the output end of the second rotary driving device is connected with the driving wheel of the second crawler traveling mechanism (22) in a chain transmission manner.

2. The chassis for the high-stalk crop field operation vehicle according to claim 1, wherein a driving wheel (212) of the first crawler traveling mechanism (21) is connected with a first sprocket (41) in a rotation stopping manner, an output end of the first rotation driving device (31) is connected with a second sprocket (42) which is correspondingly arranged with the first sprocket (41), the first sprocket (41) and the second sprocket (42) are in transmission connection through a first chain (43), and the first sprocket (41), the second sprocket (42) and the first chain (43) are arranged at intervals relative to the front and the back of the supporting part which is positioned at the left side of the frame (1).

3. Chassis for a field operation vehicle for high-pole crops according to claim 2, characterized in that a connecting plate (51) is fixed at the position of the lower end of the frame (1) opposite to the left and right of the first sprocket (41), a spacing roller (44) is rotatably connected to the middle part of the connecting plate (51), the spacing roller is arranged in the space between the first sprocket (41) and the second sprocket (42), and the spacing roller is positioned in the annular space enclosed by the first chain (43);

the connecting plate (51) is provided with a tensioning mechanism for tensioning the first chain (43), and the tensioning mechanism and the interval roller are arranged at intervals.

4. A chassis for a high crop field operation vehicle according to claim 3, characterized in that the tensioning mechanism comprises a first pressure plate (52), a second pressure plate (53) and a tension spring (54); the upper part of the connecting plate (51) is fixedly connected to the frame (1), and the first pressing plate (52) and the second pressing plate (53) are oppositely arranged on the front side and the rear side of the first chain (43) by taking a connecting line of the centers of the first chain wheel (41) and the second chain wheel (42) as the center;

the first pressing plate (52) faces one side of the first chain (43) and one side of the second pressing plate (53) faces the first chain (43) and is provided with an arc-shaped surface, the first end of the first pressing plate (52) and the first end of the second pressing plate (53) are rotationally connected to the connecting plate (51), two ends of the tension spring (54) are respectively connected with the second end of the first pressing plate (52) and the second end of the second pressing plate (53), so that the second end of the first pressing plate (52) and the second end of the second pressing plate (53) are close to each other, and the arc-shaped surface of the first pressing plate (52) and the arc-shaped surface of the second pressing plate (53) respectively push against the front side and the rear side of the first chain (43).

5. Chassis for a field operation vehicle for high-stalk crops according to claim 1, characterized in that the frame (1) is fixed with a first louver (61) at a position in front of the first crawler running mechanism (21) and in front of the second crawler running mechanism (22), each first louver (61) is provided with a first accommodation groove with an opening facing backward, and the front of the first crawler running mechanism (21) and the front of the second crawler running mechanism (22) are respectively located in the corresponding first accommodation groove.

6. Chassis for a field operation vehicle for high-stalk crops according to claim 1, characterized in that the positions behind the wheel frame (211) of the first crawler running mechanism (21) and behind the wheel frame of the second crawler running mechanism (22) are both connected with a second louver (62), the second louver (62) is provided with a second accommodation groove with a forward opening, and the rear part of the first crawler running mechanism (21) and the rear part of the second crawler running mechanism (22) are respectively located in the corresponding second accommodation groove.

7. Chassis for a field operation vehicle for high-pole crops according to claim 1, characterized in that it comprises a control box (7), the upper part of the frame (1) is provided with a first fixing position for detachably connecting the control box (7), and the front end of the frame (1) is provided with a second fixing position for detachably connecting the control box (7).

8. The chassis for a field operation vehicle for high-pole crops according to claim 1, wherein the first rotation driving device (31) and the second rotation driving device are hydraulic motors, the liquid inlet ends of the hydraulic motors are connected with hydraulic pumps, the hydraulic pumps are fixed on the frame (1), and a gasoline engine (8) in transmission connection with an input shaft of the hydraulic pump is also fixed on the frame (1).

9. The chassis for a field operation vehicle for high-stalk crops according to claim 8, wherein the supporting portion comprises at least two upright posts (23) arranged in a front-rear interval, each of the upright posts (23) being arranged in a front-rear interval;

the chassis for the field operation vehicle for the high-pole crops comprises a hydraulic oil tank (32), wherein two upright posts (23) which are adjacent front and back, a first crawler traveling mechanism (21) and a frame (1) enclose a rectangular installation space, the width of the hydraulic oil tank (32) is smaller than or equal to that of a crawler (213) of the first crawler traveling mechanism (21), and the hydraulic oil tank (32) is arranged in the rectangular installation space.

10. Chassis for a field operation vehicle for high-pole crops according to claim 8, characterized in that it comprises a radiator (93) for radiating hydraulic oil, said radiator (93) being fixed to the frame (1).