CN114408041A

CN114408041A - Track vehicle

Info

Publication number: CN114408041A
Application number: CN202210059374.5A
Authority: CN
Inventors: 孟祥伟; 于世成; 施晓明
Original assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Current assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-29

Abstract

The invention discloses a tracked vehicle, relates to the field of machinery, and aims to improve the mobility, trafficability and operation efficiency of the tracked vehicle. The tracked vehicle comprises a frame and a travelling mechanism. The walking mechanism comprises a driving wheel, a guide wheel and a crawler; the driving wheel and the guide wheel are both arranged on the frame; the installation position of the driving wheel is higher than that of the guide wheel, and the crawler belt is wound on the outer sides of the driving wheel and the guide wheel. According to the technical scheme, the traveling mechanism of the tracked vehicle comprises the driving wheel, the guide wheel and the track, the driving wheel is arranged off the ground, and the part of the track meshed with the driving wheel is also off the ground, so that the ground impact load is prevented from being directly transmitted to the driving wheel, the service life of a transmission system connected with the driving wheel is prolonged, the tracked vehicle is provided with a high-driving self-adaptive terrain traveling system and can have higher traveling speed, and the maneuverability, the trafficability and the operation efficiency of the tracked vehicle are greatly improved.

Description

Track vehicle

Technical Field

The invention relates to the field of track machinery, in particular to a tracked vehicle.

Background

The bulldozer is a main machine type in the shoveling and transporting machinery products, is widely applied to the fields of mines, water conservancy projects, buildings, road building, coal mining, ports, agriculture and forestry, national defense projects and the like, can complete the operations of excavation, accumulation, backfilling, leveling, compaction and the like, and is ideal equipment for short-distance transportation.

According to the difference of the walking device, the bulldozer can be divided into two categories:

(1) crawler type bulldozer

The crawler dozer has large adhesive force, good trafficability and small ground pressure, and is suitable for soft and wet land operation. The crawler belt has strong climbing capability, can work under severe working conditions, such as gravel land, uneven land and the like, has better wear resistance and longer service life, is suitable for working in the zone with poorer conditions, but has low running speed.

(2) Tyre type bulldozer

The running speed is high, the transport distance is long, the operation cycle time is short, and the productivity is high. The mobility is strong, the transfer is convenient, and the road surface is not damaged. But the traction force is small, the trafficability is poor, and the device is suitable for frequent site change and good soil operation.

The inventor finds that at least the following problems exist in the prior art: (1) the traveling system of the existing crawler type bulldozer is rigidly connected with a frame, the traveling speed is low, the maneuverability is poor, a trailer is required for transportation during transition, and the guarantee requirement is high. (2) The wheel type bulldozer has poor road surface adaptability, and the operation rate is greatly reduced in rainy days or operation on muddy ground, so that the requirements of all-weather all-terrain operation cannot be met.

Disclosure of Invention

The invention provides a tracked vehicle, which is used for improving the maneuverability, the trafficability and the operation efficiency of the tracked vehicle.

An embodiment of the present invention provides a tracked vehicle, including:

a frame; and

the traveling mechanism comprises a driving wheel, a guide wheel and a crawler; the driving wheel and the guide wheel are both arranged on the frame; the installation position of the driving wheel is higher than that of the guide wheel, and the crawler belt is wound on the outer sides of the driving wheel and the guide wheel.

In some embodiments, the drive wheel is configured to have clearance from the ground, and the portion of the track that engages the drive wheel is also configured to have clearance from the ground during walking.

In some embodiments, the drive wheel is located on a side of the guide wheel proximate the rear of the frame.

In some embodiments, the walking mechanism further comprises:

and a weight-bearing wheel group installed between the driving wheel and the guide wheel, wherein portions of the track engaged with each of the weight-bearing wheel group and the guide wheel are configured to contact the ground during walking.

In some embodiments, the load wheel set comprises:

a first bogie wheel located on a side of the guide wheel facing the drive wheel;

the second loading wheel is positioned on one side, facing the driving wheel, of the first loading wheel; and

and the third loading wheel is positioned on one side of the second loading wheel, which faces the driving wheel.

In some embodiments, the tracked vehicle further comprises:

the suspension system comprises a first oil cylinder, a valve and an energy accumulator; the valve is arranged between the first oil cylinder and the energy accumulator so as to control the connection and disconnection of an oil path between the first oil cylinder and the energy accumulator;

the first oil cylinder is further installed between the travelling mechanism and the frame.

In some embodiments, when said bulldozer is in a driving mode, an oil path between said first cylinder and said accumulator is open;

when the bulldozer is in a bulldozer mode, the oil path between the first oil cylinder and the energy accumulator is disconnected.

In some embodiments, the tracked vehicle further comprises:

and the cab is arranged at the top of the frame and is positioned at the front end of the frame.

In some embodiments, the middle of the cab is located directly above the guide wheels, and the front end of the cab is located on a side of the guide wheels away from the drive wheels.

In some embodiments, the tracked vehicle further comprises:

the suspension system comprises a first oil cylinder, a valve and an energy accumulator; the valve is arranged between the first oil cylinder and the energy accumulator so as to control the connection and disconnection of an oil path between the first oil cylinder and the energy accumulator; the first oil cylinder is also arranged between the travelling mechanism and the frame; and

the cab is arranged at the top of the frame and is positioned at the front end of the frame;

wherein, when the piston rod of the first cylinder of the suspension system is in a retracted state, the cab is configured to be tilted with respect to a horizontal plane to reduce a height at the cab of the bulldozer.

In some embodiments, the tracked vehicle further comprises:

a lifting system mounted between a bottom of the cab and the frame, the lifting system configured to lift the cab relative to the frame.

In some embodiments, the tracked vehicle further comprises:

the operating mechanism comprises a dozer blade and a second oil cylinder; the second cylinder is mounted to the frame and configured to drive the blade to rotate about the first axis such that the height of both sides of the blade in the width direction is adjustable.

In some embodiments, the work mechanism further comprises:

the third oil cylinder is arranged between the top of the dozer blade and the frame; and

the fourth oil cylinder is arranged between the bottom of the dozer blade and the frame;

wherein the third and fourth cylinders are configured to drive the blade to rotate about a second axis such that the angle of inclination of the top and bottom of the blade is adjustable.

In some embodiments, the work mechanism further comprises:

one end of the lifting oil cylinder is hinged with the frame;

the pushing beam is hinged with the other end of the lifting oil cylinder; one end of the second oil cylinder is hinged with the pushing beam, and the other end of the second oil cylinder is hinged with the dozer blade.

In some embodiments, the blade comprises:

the shovel blade is arranged on the pushing beam; and

the scarifier comprises at least two scarifiers; at least one ripper is hinged to the shovel blade, and at least one ripper is hinged to the pushing beam.

In some embodiments, the cab of the bulldozer has a viewing window located at the bottom of the cab so that the top end, the bottom end, and the widthwise edge of the blade are viewed from within the cab through the viewing window.

In some embodiments, the tracked vehicle further comprises:

the driving mechanism is in driving connection with a driving wheel of the travelling mechanism; and

a controller communicatively coupled to the drive mechanism to vary an output power of the drive mechanism.

In some embodiments, the bulldozer has a drive mode and a dozing mode; the output power of the drive mechanism when the bulldozer is in the drive mode is greater than the output power of the drive mechanism when the bulldozer is in the dozing mode.

In some embodiments, the tracked vehicle is a bulldozer, a tractor.

According to the crawler vehicle provided by the technical scheme, the traveling mechanism comprises the driving wheel, the guide wheel and the crawler, the driving wheel is arranged off the ground, the part of the crawler, which is meshed with the driving wheel, is also off the ground, the direct transmission of ground impact load to the driving wheel is avoided, the service life of a transmission system connected with the driving wheel is prolonged, the crawler has a high-driving self-adaptive terrain traveling system, and higher traveling speed can be achieved, so that the maneuverability, the trafficability and the operation efficiency of the crawler vehicle are greatly improved, and the crawler vehicle has the maneuverability which is not lower than that of a traditional tire type bulldozer, the road surface adaptability which is not lower than that of the traditional crawler type bulldozer and the operation efficiency. The bulldozer overcomes the defect of poor maneuverability of the traditional crawler bulldozer. Moreover, the tracked vehicle provided by the technical scheme has the advantages of good trafficability of the tracked chassis and small ground pressure, and is suitable for running and operating under severe working conditions of softness, humidity and the like.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic view of a traveling state of a bulldozer according to an embodiment of the present invention.

Fig. 2 is a schematic view of a dozer dozing state according to an embodiment of the present invention.

FIG. 3 is a schematic view of the suspension system of the bulldozer according to the embodiment of the present invention.

FIG. 4 is a schematic view showing a state where a first cylinder of a suspension system of a bulldozer is retracted according to an embodiment of the present invention.

Fig. 5 is a schematic view showing the cab of the bulldozer being lifted according to the embodiment of the present invention.

FIG. 6 is a schematic view showing a radiator of a bulldozer according to an embodiment of the present invention being raised.

Fig. 7 is a schematic structural view of a work mechanism of a bulldozer according to an embodiment of the present invention.

Fig. 8 is a schematic view of a dozer blade of the bulldozer according to the embodiment of the present invention in an inclined state driven by the second cylinder.

Fig. 9 is a schematic view showing another inclined state of the blade of the bulldozer according to the embodiment of the present invention, the blade being driven by the second cylinder.

Fig. 10 is a schematic view showing an inclined state of the blade of the bulldozer according to the embodiment of the present invention, the blade being driven by the third cylinder and the fourth cylinder.

Fig. 11 is a schematic view showing another inclination state of the blade of the bulldozer according to the embodiment of the present invention, which is driven by the third cylinder and the fourth cylinder.

FIG. 12 is a schematic view showing the control logic for the drive mode and the dozing mode of the bulldozer according to the embodiment of the present invention.

Fig. 13 is a partially enlarged schematic view of the crawler belt of the blade of the bulldozer according to the embodiment of the present invention.

Reference numerals:

1. a frame; 2. a traveling mechanism; 3. a suspension system; 4. a cab; 5. a lifting system; 6. an operating mechanism; 7. a drive mechanism; 8. a winch; 9. a heat sink; 10. a lifting mechanism;

21. a drive wheel; 22. a guide wheel; 23. a crawler belt; 24. a load bearing wheel set;

241. a first bogie wheel; 242. a second bogie wheel; 243. a third bogie wheel;

31. a first cylinder; 32. a valve; 33. an accumulator;

41. an observation window;

61. a dozer blade; 62. a second cylinder; 63. a third oil cylinder; 64. a fourth cylinder; 65. a lift cylinder; 66. pushing the beam;

611. a scraper knife; 612. a ripper;

71. engine, 72, gearbox; 73. a drive axle.

Detailed Description

The technical solution provided by the present invention will be explained in more detail with reference to fig. 1 to 13.

The memory of the tracked vehicle provided by the embodiment of the invention can be a bulldozer in engineering machinery and a tracked tractor in agricultural machinery. Hereinafter, a bulldozer will be described as an example.

A bulldozer is one type of earth-moving machine. The bulldozer is a main machine type in the shoveling and transporting machinery products, is widely applied to the fields of mines, water conservancy projects, buildings, road building, coal mining, ports, agriculture and forestry, national defense projects and the like, can complete the operations of excavation, accumulation, backfilling, leveling, compaction and the like, and is ideal equipment for short-distance transportation. Shoveling and transporting soil generally refers to shoveling and transporting loose materials within a transport distance of 100 m. Used for pushing and shoveling foundation pits and cutting and constructing embankments. The filling refers to backfilling of foundation pits and refuse landfill. Filling soil into trenches, foundation trenches, sewers and the like. The flat ground means a flat construction site, a farmland and the like. The soil loosening is realized by means of a soil loosening device, so that hard soil and frozen soil can be broken, and the road surface needing to be repaired can be damaged. In the related technology, the transportation distance of a small-sized bulldozer is 30-100 m, the transportation distance of a large-sized bulldozer is not more than 150m, and the economic transportation distance of the bulldozer is 50-80 m. By adopting the technical scheme of the embodiment of the invention, the bulldozer can realize long-distance running, such as running of dozens of kilometers.

Referring to fig. 1 and 2, an embodiment of the present invention provides a bulldozer, which includes a frame 1 and a traveling mechanism 2. The traveling mechanism 2 includes a drive wheel 21, a guide wheel 22, and a crawler belt 23. The driving wheel 21 and the guide wheel 22 are both arranged on the frame 1; the driving wheel 21 is installed at a higher position than the guide wheel 22, and the crawler belt 23 is wound around the driving wheel 21 and the guide wheel 22.

The frame 1 is a load-bearing member of the bulldozer and is also a mounting member for the traveling mechanism 2. Referring to fig. 1 and 2, the running gear 2 includes a driving wheel 21, a guide wheel 22, and a crawler belt 23. From the shape of the crawler belt 23, the crawler belt 23 is roughly divided into two sections: the section of track 23 on the front side of the bulldozer, section S1, is always in contact with the ground, and this section of track 23 carries the weight of the entire bulldozer whether the bulldozer is in drive mode or dozing mode. The section of track 23 on the front side of the bulldozer, i.e., the section S2, is always out of contact with the ground, i.e., the section of track 23 is tilted up, and there is a gap with the ground, which gap allows the section of track 23 not to bear the weight of the bulldozer regardless of whether the bulldozer is in the drive mode or the dozing mode, but allows the kinetic energy to be transmitted, so that the kinetic energy of the drive wheel 21 is transmitted to the guide wheel 22 via the entire track 23. Above-mentioned technical scheme, the arrangement mode that the drive wheel 21 adopted the overhead, has avoided ground impact load direct transmission to drive wheel 21, has improved the life-span of the transmission system that couples together with drive wheel 21.

On both sides of the bulldozer in the width direction, a set of travel mechanisms 2 is provided. The two sets of running gears 2 are relatively independent, and are respectively independently installed and controlled. The following description will be given taking the traveling mechanism 2 on the side illustrated in fig. 2 and 2 as an example.

Above-mentioned technical scheme, make drive wheel 21 not actually bear the influence of road surface jolting, make the drive speed of drive wheel 21 very fast that can set up as required, make the bull-dozer adopt the running gear 2 of track 23 formula, but it is strong to have climbing ability simultaneously, can work under abominable operating condition, for example rubble ground, go under the environment such as uneven ground, the wearability is good, long service life's advantage, it is little to have ground connection specific pressure simultaneously, the speed of going is fast, the transport distance is long, the operation cycle time is short, the advantage that productivity ratio is high, suitable go and the operation under the abominable operating mode such as soft, moist, the mobility ability and the trafficability of bull-dozer have been improved greatly, make the mobility ability of bull-dozer obtain very big improvement and development.

Specifically, in some embodiments, the drive wheel 21 is configured to have clearance from the ground, and the portion of the track 23 that engages the drive wheel 21 is also configured to have clearance M from the ground during walking. The centre axis of the driving wheel 21 is approximately level with the highest point of the guiding wheel 22. The drive wheel 21 and the guide wheel 22 are relatively large in radius, and the radius of the drive wheel 21 is larger than or equal to the radius of the guide wheel 22. The portion of the track 23 that engages with the drive wheel 21 refers to the pitch at which the track 23 engages with the drive wheel 21. These tooth segments have a clearance M from the ground.

With continued reference to fig. 1 and 2, in some embodiments, the drive wheel 21 is located on a side of the guide wheel 22 that is closer to the rear of the frame 1. The drive wheel 21 is located at the rearmost end of the track 23 and the guide wheel 22 is located at the foremost end of the track 23.

With continued reference to fig. 1 and 2, in some embodiments, the travel mechanism 2 further includes a load-bearing wheel set 24, the load-bearing wheel set 24 being mounted between the drive wheel 21 and the guide wheel 22, and portions of the track 23 that engage each of the load-bearing wheel set 24 and the guide wheel 22 being configured to contact the ground during travel.

The load-bearing wheel set 24 and the guide wheel 22 play a role of bearing, and the radius of the load-bearing wheel set 24 is smaller than that of the driving wheel 21 and is also smaller than that of the guide wheel 22.

With continued reference to fig. 1 and 2, in some embodiments, the set of load wheels 24 includes a first load wheel 241, a second load wheel 242, and a third load wheel 243. The first loading wheel 241 is located on the side of the guide wheel 22 facing the drive wheel 21. The second loading wheel 242 is located on the side of the first loading wheel 241 facing the drive wheel 21. The third road wheel 243 is located on the side of the second road wheel 242 facing the drive wheel 21.

The first bogie wheel 241 and the second bogie wheel 242 have the same size. The first road wheel 241 and the second road wheel 242 are two, and the two first road wheels 241 can be mounted on the same support frame, so that the two first road wheels 241 are connected with the frame 1 through the support frame. The two second road wheels 242 may both be mounted on another support frame by which the two second road wheels 242 are connected to the frame 1. The third road wheel 243 has a radius dimension larger than the radius dimensions of the first road wheel 241 and the second road wheel 242, and the third road wheel 243 has a radius dimension smaller than the radius dimensions of the drive wheel 21 and the guide wheel 22.

In some embodiments, the bulldozer further comprises a suspension system 3, the suspension system 3 comprising a first cylinder 31, a valve 32 and an accumulator 33; the valve 32 is provided between the first cylinder 31 and the accumulator 33 to control the connection and disconnection of the oil path between the first cylinder 31 and the accumulator 33. Wherein, the first oil cylinder 31 is also arranged between the running mechanism 2 and the frame 1.

The suspension system 3 may comprise one or more. In some embodiments, the number of the suspension systems 3 is plural, and each of the first road wheels 241 is connected to the frame 1 through one suspension system 3. Each second road wheel 242 is connected to the frame 1 via a further suspension system 3. The guide wheels 22 are also connected to the frame 1 via a suspension system 3.

In other embodiments, the guide wheel 22 and the two first road wheels 241 are jointly connected to the frame 1 by means of a suspension system 3. The two second bogie wheels 242 and the third bogie wheel 243 are jointly connected to the frame 1 via a further suspension system 3. The guide wheels 22 and the load wheel groups 24 are required to bear the weight of the bulldozer and to receive the vibration of the impact from the bumpy ground, so that the suspension system 3 is adjusted to a state where the first oil cylinder 31 is communicated with the accumulator 33, so that the shock absorption effect can be well achieved, and the handling characteristics of the guide wheels 22 and the load wheel groups 24 are improved. On the other hand, by adjusting the suspension system 3 to the state that the first oil cylinder 31 is disconnected from the accumulator 33, the guide wheels 22 and the load wheel group 24 can be rigidly connected with the frame 1, so that the guide wheels 22 and the load wheel group 24 can meet the structural requirements and the stress requirements of the bulldozer soil pushing driving mode.

The driving wheel 21 is used for receiving power transmitted by a driving mechanism 7 described later, and the suspension system 3 is not provided between the driving wheel 21 and the frame 1. Therefore, the driving wheel 21 is not always in contact with the ground, and does not receive the impact transmitted from the ground.

Specifically, when the bulldozer is in the drive mode, the oil path between the first cylinder 31 and the accumulator 33 is open. When the bulldozer is in the dozing mode, the oil path between the first cylinder 31 and the accumulator 33 is cut off.

The valve 32 of the suspension system 3 may be a solenoid valve 32, such as a two-position two-way solenoid valve 32. When the two-position two-way solenoid valve 32 is at the upper position shown in fig. 3, the two-position two-way solenoid valve 32 is at the valve 32 position that is conducted, the first oil cylinder 31 is communicated with the energy accumulator 33, and the suspension system 3 can play a role in shock absorption. When the two-position two-way electromagnetic valve 32 is positioned at the lower position shown in fig. 3, the two-position two-way electromagnetic valve 32 is positioned at the disconnected valve 32, the first oil cylinder 31 is disconnected and not communicated with the energy accumulator 33, the suspension system 3 has no damping effect, all parts connected with the suspension system 3 are rigidly connected with the suspension system 3, and the suspension system 3 is also rigidly connected with the frame 1, so that the rigid connection of the guide wheels 22 and the load-bearing wheel group 24 with the frame 1 is realized, and the stability of the whole bulldozer during the bulldozer dozing operation is enhanced. According to the technical scheme, the adjustment of the characteristic effect of the suspension system 3 is reliably and simply realized by adjusting the valve 32 position of the electromagnetic valve 32, so that the suspension system 3 can be freely switched between the two effects of realizing the buffering effect and the rigid connection.

In some embodiments, the bulldozer further comprises a cab 4, and the cab 4 is mounted on top of the frame 1 and located at the front end of the frame 1. The cab 4 is forward, so that the driver obtains a good working view.

In some embodiments, the middle of the cab 4 is located directly above the guide wheels 22, and the front end of the cab 4 is located on the side of the guide wheels 22 away from the drive wheels 21. In fig. 1, the vertical plane L corresponding to the foremost end of the running gear 2 is illustrated, and it is seen that the front part of the cab 4 is located in front of the vertical plane L and projects beyond the running gear 2.

Referring to fig. 4, in some embodiments, the bulldozer further comprises a suspension system 3 and a cab 4. The suspension system 3 still employs the implementation described above. The suspension system 3 comprises a first cylinder 31, a valve 32 and an accumulator 33; the valve 32 is arranged between the first oil cylinder 31 and the accumulator 33 to control the connection and disconnection of the oil path between the first oil cylinder 31 and the accumulator 33; wherein, the first oil cylinder 31 is also arranged between the running mechanism 2 and the frame 1. The cab 4 is mounted on the top of the frame 1 and is located at the front end of the frame 1. Wherein the cab 4 is configured to be tilted with respect to the horizontal plane to reduce the height at the cab 4 of the bulldozer when the piston rod of the first cylinder 31 of the suspension system 3 is in the retracted state.

The suspension system 3 is located below the cab 4, and when the piston rod of the first cylinder 31 of the suspension system 3 is retracted to the shortest, the suspension system 3 is in the retracted state and the entire cab 4 assumes the tilted state shown in fig. 4. During transport, industry standards dictate the overall height of the vehicle, and the highest elevation of the bulldozer is where cab 4 is located. By adopting the mode of retracting the suspension system 3, the whole vehicle height of the cab 4 of the bulldozer can be reduced, so that the bulldozer meets the limit requirement of the industry standard on the vehicle height.

Above-mentioned technical scheme has overcome the poor shortcoming of traditional crawler dozer mobility, and working radius is big for tracked vehicle only needs the trailer transportation when long-distance transition, can go at a high speed by oneself under other occasions, so greatly reduced to tracked vehicle's guarantee requirement, feasible other traction vehicle that do not just can realize tracked vehicle and travel in the economy distance adversion. Meanwhile, the rubber track 23 enables the earth pressure ratio of the bulldozer to be low, enhances the road adaptability and meets the requirements of all-weather all-terrain operation.

Referring to fig. 5, in some embodiments, the bulldozer further comprises a lifting system 5, the lifting system 5 being mounted between the bottom of the cab 4 and the frame 1, the lifting system 5 being configured to lift the cab 4 relative to the frame 1. The lifting system 5 is specifically a hydraulic system, specifically including a hydraulic oil cylinder and the like. The lifting system 5 can turn the cab 4 by a certain angle alpha, specifically 40-50 degrees for example, so that the components between the cab 4 and the frame 1 can be exposed, the bottom of the cab 4 is exposed, the top of the frame 1 at the cab 4 is exposed, and the maintenance is more convenient.

Referring to fig. 6, in other embodiments, the bulldozer further comprises a radiator 9 and a lifting mechanism 10. Radiator 9 is arranged horizontally, and radiator 9 is located above engine 71 and directly behind cab 4. The lifting mechanism 10 is disposed between the frame 1 and the radiator 9, and the lifting mechanism 10 can be implemented by an electric driving mechanism, a hydraulic mechanism, or other manners. The lift mechanism 10 is used to turn the radiator by a set angle β, specifically, 20 ° -30 °, to expose components located below the radiator 9, thereby facilitating maintenance of the engine 71 and power system accessories.

Referring to fig. 7 to 9, in some embodiments, the bulldozer further comprises a working mechanism 6, and the working mechanism 6 comprises a blade 61 and a second cylinder 62. The dozer blade 61 is specifically, for example, a universal blade, and the universal blade is lifted, inclined, and swung to meet the requirement of multi-working-condition operation. The second cylinder 62 is mounted to the frame 1. The second cylinder 62 is configured to rotate the blade 61 about the first axis so that the height of both sides of the blade 61 in the width direction is adjustable.

Blade 61 includes blade 611 and ripper 612. The shovel blades 611 are mounted on the pushing beams 66, and the scarifier 612 comprises at least two blades; at least one ripper 612 is hinged to blade 611, and at least one ripper 612 is hinged to ejector beam 66. In the embodiment illustrated in fig. 5, there are one blade 611 and four rippers 612. Two of the scarifiers 612 are hinged to the blade 611, and the other two scarifiers 612 are hinged to the pushing beam 66. When the bulldozer pushes forwards, the scarifier 612 can rotate around the hinge shaft and does not play a role in scarifying soil; when the bulldozer backs a car, the rotation of the scarifier 612 is limited by mechanical limit at the hinged seat, so that the action of loosening hard soil is achieved; during transition, the ripper 612 is retracted, and the ripper 612 is fixed by using a chain.

Specifically, the working mechanism 6 further includes a jack beam 66 and a lift cylinder 65. The ejector beam 66 is located inside the track 23 in the width direction of the tracked vehicle. One end of the lifting oil cylinder 65 is hinged with the frame 1, and the other end is hinged with the pushing beam 66; one end of the second oil cylinder 62 is hinged with the pushing beam 66, and the other end is hinged with the dozer blade 61. That is, the blade 61 is connected to the frame 1 via the push beam 66, and the push beam 66 is hinged to the frame 1 via the lift cylinder 65. The second cylinder 62 is obliquely installed, and the end of the piston rod of the second cylinder 62 far away from the cylinder barrel is hinged with the blade 61, and the hinged point is called a first hinged point. The end of the cylinder barrel of the second cylinder 62, which is far away from the piston rod, is hinged to the pushing beam 66 of the frame 1, and this hinge point is called a second hinge point. The first hinge point is located lower than the second hinge point in the height direction of the bulldozer. The height of the two sides of the dozer blade 61 in the width direction is adjusted by the extension and contraction of the second oil cylinder 62, so that the operation requirement is met. The lift cylinder 65 is used to raise and lower the entire blade 61 so that the work blade is switched between the travel mode shown in fig. 1 and the dozing mode shown in fig. 2.

Fig. 8 and 9 illustrate two tilting states of the blade 61 by the second cylinder 62, and it can be seen that in fig. 8 and 9, the blade 61 is different in height on both sides in the width direction of the bulldozer, and the side a is high and the side B is low in fig. 8; in FIG. 9, the opposite is true, with side A low and side B high.

Referring to fig. 7, 10 and 11, in some embodiments, the work implement 6 further includes a third cylinder 63 and a fourth cylinder 64. A third cylinder 63 is mounted between the top of the blade 61 and the frame 1. The fourth cylinder 64 is mounted between the bottom of the blade 61 and the frame 1. Wherein the third and

fourth cylinders

63, 64 are configured to rotate the blade 61 about the second axis such that the angle of inclination of the top and bottom of the blade 61 is adjustable.

Above-mentioned technical scheme, through nimble adjustment dozer blade 61's gesture, satisfied bulldoze, clear away the barrier, multiple operation demands such as level and smooth.

Fig. 10 shows the third cylinder 63 in an extended state, the fourth cylinder 64 in a retracted state, and the blade 61 in a state in which the top is extended and the bottom is retracted. FIG. 11 shows the state where the third cylinder 63 is retracted, the fourth cylinder 64 is extended, and the blade 61 is retracted at the top and extended at the bottom

Referring to fig. 6 and 7, in some embodiments, cab 4 of the bulldozer has observation window 41, and observation window 41 is located at the bottom of cab 4 so that the top end and bottom end of blade 61, and the widthwise edge of blade 61 are viewed from inside cab 4 through observation window 41. According to the technical scheme, the situation of material piling in front of the dozer blade 61 can be observed in real time without auxiliary camera equipment, the problem that the working view of drivers of the traditional crawler 23 type and tire type bulldozers is poor is effectively solved, and the working view of the drivers is greatly expanded.

Referring to fig. 12, in some embodiments, the bulldozer further comprises a drive mechanism 7 and a controller. The driving mechanism 7 is in driving connection with a driving wheel 21 of the travelling mechanism 2; the controller is in communication with the drive mechanism 7 to vary the output power of the drive mechanism 7.

The drive mechanism 7 includes an engine 71, a transmission case 72, and a transaxle 73. The engine 71 is drivingly connected to the gearbox 72 for transmitting power to the gearbox 72. The gearbox 72 is drivingly connected to the transaxle 73 to transmit power to the transaxle 73.

With continued reference to FIG. 12, in some embodiments, the bulldozer has a drive mode and a doze mode. The output power of the drive mechanism 7 when the bulldozer is in the drive mode is greater than the output power of the drive mechanism 7 when the bulldozer is in the dozing mode. The transaxle 73 is drivingly connected to each traveling mechanism 2 to transmit power to each traveling mechanism 2.

The main functions of the bulldozer are a high-speed driving mode and a dozing mode. The power system has two power modes of high power and low power, and when the vehicle runs at high speed, the engine is in the high power mode; during the bulldozing operation, the engine is in a low-power mode. The bulldozer specifically adopts a six-in two-out gearbox, and when the bulldozer runs at a high speed: the gears are freely and automatically switched from the gear 1 to the highest gear. When in bulldozing operation, the 1-3 forward gears can be manually selected according to the requirements of working conditions. Moreover, the bulldozer has a high-speed reverse gear function, so that the operation cycle time is shortened, and the bulldozer improves the bulldozer efficiency.

As described above, the bulldozer according to the embodiment of the present invention is a crawler bulldozer, the crawler tracks 23 may be rubber tracks 23 in a herringbone pattern, as shown in fig. 13, and the tracks 23 having such a pattern have a strong gripping ability, so that the bulldozer can exert sufficient traction force; meanwhile, the ground pressure is reduced, and the road surface adaptability of the bulldozer is enhanced.

In other embodiments, the tracked vehicle further comprises a winch 8. The winch 8 is arranged in the middle of the rear part of the bulldozer, and the winch 8 is used for dragging logs, laying pipes, saving self, rescuing the users and the like. The drum of the winch 8 is rotatable in forward and reverse directions for winding and unwinding the rope.

In other embodiments the tracked vehicle further comprises a towing hook 9, the towing hook 9 also being arranged centrally at the rear of the bulldozer, directly below the winch 8, the towing hook 9 being used for towing a trailer or a vehicle that is out of power.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tracked vehicle, comprising:

a frame (1); and

a traveling mechanism (2) including a drive wheel (21), a guide wheel (22), and a crawler (23); the driving wheel (21) and the guide wheel (22) are both mounted on the frame (1); the installation position of the driving wheel (21) is higher than that of the guide wheel (22), and the crawler belt (23) is wound on the outer sides of the driving wheel (21) and the guide wheel (22).

2. The tracked vehicle of claim 1, wherein the drive wheel (21) is configured to have clearance from the ground, and the portion of the track (23) that engages the drive wheel (21) is also configured to have clearance from the ground during walking.

3. Tracked vehicle according to claim 1, characterized in that the drive wheel (21) is located on the side of the guide wheel (22) close to the rear of the frame (1).

4. The tracked vehicle of claim 1, wherein the running gear (2) further comprises:

a weight-bearing wheel group (24) installed between the driving wheel (21) and the guide wheel (22), and portions of the track (23) engaged with each of the weight-bearing wheel group (24) and the guide wheel (22) are configured to contact the ground during walking.

5. The tracked vehicle of claim 4, wherein the set of load wheels (24) comprises:

a first bogie wheel (241) located on a side of the guide wheel (22) facing the drive wheel (21);

a second bogie wheel (242) on a side of the first bogie wheel (241) facing the drive wheel (21); and

a third bogie wheel (243) on a side of the second bogie wheel (242) facing the drive wheel (21).

6. The tracked vehicle defined in claim 1, further comprising:

a suspension system (3) comprising a first cylinder (31), a valve (32) and an accumulator (33); the valve (32) is arranged between the first oil cylinder (31) and the energy accumulator (33) to control the connection and disconnection of an oil path between the first oil cylinder (31) and the energy accumulator (33);

the first oil cylinder (31) is further installed between the travelling mechanism (2) and the frame (1).

7. Crawler vehicle according to claim 6, characterized in that when the bulldozer is in drive mode, the oil circuit between the first cylinder (31) and the accumulator (33) is open;

when the bulldozer is in a dozing mode, the oil path between the first oil cylinder (31) and the accumulator (33) is cut off.

8. The tracked vehicle defined in claim 1, further comprising:

and the cab (4) is arranged at the top of the frame (1) and is positioned at the front end of the frame (1).

9. A tracked vehicle according to claim 8, characterized in that the middle of the cab (4) is located directly above the guide wheels (22), and the front end of the cab (4) is located on the side of the guide wheels (22) remote from the drive wheels (21).

10. The tracked vehicle defined in claim 1, further comprising:

a suspension system (3) comprising a first cylinder (31), a valve (32) and an accumulator (33); the valve (32) is arranged between the first oil cylinder (31) and the energy accumulator (33) to control the connection and disconnection of an oil path between the first oil cylinder (31) and the energy accumulator (33); the first oil cylinder (31) is also arranged between the travelling mechanism (2) and the frame (1); and

the cab (4) is mounted at the top of the frame (1) and is positioned at the front end of the frame (1);

wherein, when the piston rod of the first cylinder (31) of the suspension system (3) is in a retracted state, the cab (4) is configured to be tilted with respect to the horizontal plane to reduce the height at the cab (4) of the bulldozer.

11. The tracked vehicle defined in claim 1, further comprising:

a lifting system (5) mounted between a bottom of the cab (4) and the frame (1), the lifting system (5) being configured to lift the cab (4) relative to the frame (1).

12. The tracked vehicle defined in claim 1, further comprising:

a working mechanism (6) including a blade (61) and a second cylinder (62); the second cylinder (62) is mounted to the frame (1), and the second cylinder (62) is configured to drive the blade (61) to rotate about the first axis, so that the heights of both sides of the blade (61) in the width direction are adjustable.

13. The tracked vehicle of claim 12, wherein the work machine (6) further comprises:

a third oil cylinder (63) mounted between the top of the dozer blade (61) and the frame (1); and

the fourth oil cylinder (64) is arranged between the bottom of the dozer blade (61) and the frame (1);

wherein the third cylinder (63) and the fourth cylinder (64) are configured to rotate the blade (61) about a second axis such that the angle of inclination of the top and bottom of the blade (61) is adjustable.

14. The tracked vehicle of claim 12, wherein the work machine (6) further comprises:

one end of the lifting oil cylinder (65) is hinged with the frame (1); and

the pushing beam (66) is hinged with the other end of the lifting oil cylinder (65); one end of the second oil cylinder (62) is hinged with the pushing beam (66), and the other end of the second oil cylinder is hinged with the dozer blade (61).

15. The tracked vehicle of claim 14, wherein the blade (61) comprises:

a blade (611) attached to the ejector beam (66); and

a ripper (612) including at least two; wherein at least one of the rippers (612) is hinged to the blade (611), and at least one of the rippers (612) is hinged to the ejection beam (66).

16. The crawler vehicle according to claim 12, wherein the cab (4) of the bulldozer has an observation window (41), and the observation window (41) is located at the bottom of the cab (4) so that the top end, the bottom end, and the widthwise edge of the blade (61) are observed from inside the cab (4) through the observation window (41).

17. The tracked vehicle defined in claim 1, further comprising:

the driving mechanism (7) is in driving connection with a driving wheel (21) of the travelling mechanism (2); and

a controller in communicative connection with the drive mechanism (7) to vary the output power of the drive mechanism (7).

18. The tracked vehicle defined in claim 17, wherein the bulldozer has a drive mode and a doze mode; the output power of the driving mechanism (7) when the bulldozer is in the driving mode is greater than the output power of the driving mechanism (7) when the bulldozer is in the dozing mode.

19. The tracked vehicle defined in claim 17, wherein the tracked vehicle is a bulldozer, a tractor.