CN209888972U

CN209888972U - Crawler chassis

Info

Publication number: CN209888972U
Application number: CN201920490443.1U
Authority: CN
Inventors: 王术平; 宋思明; 胡军辉
Original assignee: Hunan Longzhou Agricultural Machine Co Ltd
Current assignee: Hunan Longzhou Agricultural Machine Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-01-03
Anticipated expiration: 2029-04-11

Abstract

The utility model discloses a crawler chassis, which is provided with a chassis frame, a crawler belt is arranged on the chassis frame, a driving wheel, a tension pulley, a thrust wheel and a belt supporting wheel, the driving wheel is positioned in the front, the tension pulley is positioned at the rear, the thrust wheel is positioned at the lower part, the belt supporting wheel is positioned above the thrust wheel, the crawler belt forms an annular structure around the driving wheel, the tension pulley, the thrust wheel and the belt supporting wheel, a front guide wheel is arranged on the chassis frame, the front guide wheel is positioned at the front, the front guide wheel is positioned between the thrust wheel and the driving wheel in the front, the front guide wheel is arranged on the thrust wheel which is positioned higher than the front and is lower than; the height difference H2 between the driving wheel and the supporting wheel is larger than the height difference H3 between the front guide wheel and the supporting wheel. The utility model provides high walking trafficability characteristic and walking security and stability prevent that the track from damaging.

Description

Crawler chassis

Technical Field

The utility model relates to the field of agricultural machinery, in particular to crawler chassis.

Background

The crawler chassis is widely applied to field operation vehicles such as engineering machinery, tractors, agricultural machinery and the like. The walking condition is severe, and the crawler chassis is required to have good trafficability, safety and stability. The crawler belt is in contact with the ground, and the driving wheel is not in contact with the ground. When the driving wheel rotates, the caterpillar band is continuously rolled up from the rear by the driving wheel. The ground engaging portion of the track imparts a rearward force to the ground which in turn imparts a forward reaction force to the track, which reaction force is the driving force that propels the machine forward. When the driving force is sufficient to overcome the walking resistance, the bogie wheels roll forward on the upper surface of the track, thereby causing the machine to travel forward.

At present, a crawler chassis of agricultural machinery is composed of a crawler, a driving wheel, a tensioning wheel, a thrust wheel and a belt supporting wheel, the crawler generally adopts a rubber crawler, and the crawler chassis of the agricultural machinery travels in the field, so that the working environment is severe, and the crawler chassis often needs to cross over a high field ridge, so that the height difference between the driving wheel and the thrust wheel is large, the grounding angle of the crawler chassis is large, and the distance between the driving wheel and the thrust wheel is large. Track chassis is crossing very high field bank, and the effort that place ahead track hypotenuse middle part received the field bank can produce serious bending deformation, makes the cornerite increase of drive wheel and thrust wheel, and track tensile force increase causes the track fracture easily, influences track chassis's trafficability characteristic, security, stability.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a crawler chassis solves the easy fracture of track, influences the problem of crawler chassis's trafficability characteristic, security, stability.

On one hand, the utility model provides a crawler chassis, have chassis frame, install the track in chassis frame, the drive wheel, the take-up pulley, the thrust wheel, the carrier roller, the drive wheel is located the place ahead, the take-up pulley is located the rear, the thrust wheel is located the below, the carrier roller is located the thrust wheel top, the track surrounds the drive wheel, the take-up pulley, the thrust wheel, the carrier roller forms annular structure, install the place ahead leading wheel in chassis frame, the place ahead leading wheel is located the place ahead, the place ahead leading wheel is located between the thrust wheel and the drive wheel in place ahead, the place ahead leading wheel is installed and is located the thrust wheel that is higher than the place ahead, be lower than the drive wheel; the height difference H2 between the driving wheel and the supporting wheel is larger than the height difference H3 between the front guide wheel and the supporting wheel.

Further, the front guide wheel mounting position is located further forward than the front thrust wheel and further rearward than the drive wheel.

Furthermore, a certain distance H4 is reserved between the front guide wheel and the bevel edge of the track positioned in front.

Further, the inclined edge of the crawler belt positioned in front abuts against the front guide wheel under the action of external force.

Further, the height difference H2 between the driving wheel and the thrust wheel is greater than the height difference H1 between the tension wheel and the thrust wheel.

Further, the height difference H3 between the front guide wheel and the thrust wheel is greater than the height difference H1 between the tension wheel and the thrust wheel.

Furthermore, the inclination angle between the connecting line between the driving wheel and the front thrust wheel and the ground is a ground contact angle R2, the inclination angle between the connecting line between the tensioning wheel and the rear thrust wheel and the ground is a ground departure angle R1, and the ground contact angle R2 is larger than the ground departure angle R1.

Furthermore, the chassis frame is provided with four bottom guide wheels, and the four supporting wheels are positioned among the four supporting wheels; a certain distance is reserved between the bottom guide wheel and the lower edge of the crawler, and the lower edge of the crawler abuts against the bottom guide wheel under the action of external force.

Further, two guide rails are installed on the chassis frame, and the two guide rails are embedded into the guide rail grooves on the lower edge of the crawler to prevent the crawler from slipping during movement.

Further, the supporting wheel supports the upper edge of the crawler.

The utility model provides a pair of crawler chassis, the utility model discloses install the place ahead leading wheel in the chassis frame, the place ahead leading wheel is located the place ahead, and the place ahead leading wheel is located between the thrust wheel in the place ahead and the drive wheel. The utility model discloses a track chassis is crossing very high field bank, and when place ahead track hypotenuse middle part received the effort of field bank, track hypotenuse middle part can support and lean on the leading wheel in the place ahead, prevents track bending deformation, makes the cornerite of drive wheel and thrust wheel remain unchanged, prevents the increase of track tensile force, avoids the track fracture, improves track chassis's trafficability characteristic, security, stability.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of a crawler chassis of the present invention;

fig. 2 is a schematic view of the front guide wheel of fig. 1.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the present invention preferably provides a crawler belt chassis, which has a chassis frame 1, and a crawler belt 2 is mounted on the chassis frame 1, wherein the crawler belt 2 includes a crawler belt 20, 1 driving wheel 24, 1 tensioning wheel 26, 4 thrust wheels 22, 1 carrier wheel 25, 1 front guide wheel 23, 1 middle guide wheel 27, and 2 guide rails 21. The crawler 20 is a rubber crawler, the driving wheel 24 is positioned at the forefront, the tensioning wheel 26 is positioned at the rearmost, the 4 thrust wheels 22, the 2 guide rails 21 and the middle guide wheel 27 are positioned below, and the carrier roller 25 is positioned above the thrust wheels 22. The supporting roller 25 supports the upper edge of the crawler 20, the 4 supporting rollers 22 and the 2 guide rails 21 are pressed on the lower edge of the crawler 20, and the two guide rails 21 are embedded in the guide rail grooves on the lower edge of the crawler 20 to prevent the crawler 20 from slipping when moving. The crawler 20 forms a ring structure around 1 driving wheel 24, 1 tensioning wheel 26, 4 thrust wheels 22, 1 idler wheel 25, 1 front guide wheel 23, 1 middle guide wheel 27, 2 guide rails 21. The track 20 is in contact with the ground and the drive wheel 24 is not in contact with the ground. As the drive wheel 24 rotates, the track 20 is continuously rolled up from behind by the drive wheel 24. The ground engaging portion of track 20 imparts a rearward force on the ground, which in turn imparts a forward reaction force on track 20, which is the driving force that propels the machine forward.

As shown in fig. 1, the front guide wheel 23 is located at the front, the front guide wheel 23 is located between the front bogie wheel 22 and the drive wheel 24, and the front guide wheel 23 is mounted with the bogie wheel 22 located higher than the front and lower than the drive wheel 24, that is, the height difference H2 between the drive wheel 24 and the bogie wheel 22 is greater than the height difference H3 between the front guide wheel 23 and the bogie wheel 22. The front guide wheel 23 is attached at a position forward of the front bogie wheel 22 and rearward of the drive wheel 24, that is, a front-rear position difference exists between the front guide wheel 23, the front bogie wheel 22, and the drive wheel 24. A predetermined distance H4 is reserved between the front idler wheel 23 and the forward inclined track side 200, and when the forward inclined track side 200 overcomes the distance H4 with an external force, the inclined track side 200 abuts against the front idler wheel 23. As shown in fig. 2, the front guide wheel 23 is composed of left and right side rollers.

When the track chassis is crossing very high field, place ahead track hypotenuse 200 middle part receives the effort of field, when track hypotenuse 200 middle part warp and eliminate interval H4, track hypotenuse 200 middle part can lean on in the place ahead leading wheel 23, prevent that track 20 from continuing bending deformation, make the cornerite of drive wheel 24 and thrust wheel 22 keep unchangeable, prevent track 20 tensile force increase, avoid track 20 fracture, improve track chassis's trafficability characteristic, security, stability.

As shown in fig. 1, the height difference H2 between the driving wheel 24 and the bogie wheel 22 is greater than the height difference H1 between the tension wheel 26 and the bogie wheel 22. The height difference H3 between the front guide pulley 23 and the pinch roller 22 is greater than the height difference H1 between the tension pulley 26 and the pinch roller 22. The inclination angle between the connecting line between the driving wheel 24 and the front thrust wheel 22 and the ground is a ground contact angle R2, the inclination angle between the connecting line between the tensioning wheel 26 and the rear thrust wheel 22 and the ground is a ground departure angle R1, and the ground contact angle R2 is larger than the ground departure angle R1. This structural design has improved track chassis trafficability characteristic, security, stability.

As shown in fig. 1, the bottom guide wheel 27 is located between the four track rollers 22; a certain distance is reserved between the bottom guide wheel 27 and the lower edge of the crawler 20, and the lower edge of the crawler 20 abuts against the bottom guide wheel 27 under the action of external force on the crawler 20.

The techniques not described above are common general knowledge of the skilled person. The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A caterpillar chassis is provided with a chassis frame, wherein a caterpillar track, a driving wheel, a tension wheel, a thrust wheel and a belt supporting wheel are arranged on the chassis frame, the driving wheel is positioned in front, the tension wheel is positioned in rear, the thrust wheel is positioned below, the belt supporting wheel is positioned above the thrust wheel, and the caterpillar track forms an annular structure around the driving wheel, the tension wheel, the thrust wheel and the belt supporting wheel; the height difference H2 between the driving wheel and the supporting wheel is larger than the height difference H3 between the front guide wheel and the supporting wheel.

2. The track chassis of claim 1, wherein the forward idler wheel mount is forward of the forward track roller and rearward of the drive wheel.

3. The track chassis of claim 1, wherein a distance H4 is reserved between the front idler and the hypotenuse of the track.

4. The track chassis of claim 3, wherein the forward track angled edge abuts the forward idler wheel under external forces.

5. The track chassis according to any of claims 1 to 4, wherein the height difference H2 between the drive wheel and the track roller is greater than the height difference H1 between the idler and the track roller.

6. The track chassis of claim 5, wherein a height difference H3 between the front idler and the track roller is greater than a height difference H1 between the idler and the track roller.

7. The track chassis of claim 5, wherein a line connecting the drive wheel and the forward track roller is inclined at a ground contact angle R2, a line connecting the tension wheel and the rearward track roller is inclined at a ground contact angle R1, and the ground contact angle R2 is greater than the ground contact angle R1.

8. The track chassis of claim 5, wherein there are four bottom guide wheels mounted on the chassis frame, the bottom guide wheels being located between the four track wheels; a certain distance is reserved between the bottom guide wheel and the lower edge of the crawler, and the lower edge of the crawler abuts against the bottom guide wheel under the action of external force.

9. A track chassis according to claim 5, wherein two guide rails are mounted on the chassis frame, the two guide rails being embedded in guide rail grooves on the lower side of the track to prevent the track from slipping during movement.

10. The track chassis of claim 5, wherein the carrier roller holds the track upper edge.