CN113103865A

CN113103865A - Engineering machinery driving system and paver

Info

Publication number: CN113103865A
Application number: CN202110388193.2A
Authority: CN
Inventors: 任茂发; 张勇; 刘镇
Original assignee: Hunan Sany Road Machinery Co Ltd
Current assignee: Hunan Sany Road Machinery Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-07-13

Abstract

The application relates to the technical field of engineering machinery, and provides an engineering machinery driving system and a paver. Wherein, engineering machine tool actuating system includes: a drive axle; the first driving wheel of the first driving wheel set is in transmission connection with the drive axle through a first transmission mechanism; the second driving wheel set is in rotary connection with the first driving wheel set through a connecting mechanism and can realize lifting through rotation relative to the first driving wheel set; the second driving wheel of the second driving wheel set is connected with the first transmission mechanism through a second transmission mechanism, and the second transmission mechanism can be in transmission connection or disconnection with the first transmission mechanism. According to the technical scheme, different driving modes can be adopted according to different construction scenes, the adaptability to different road surfaces can be improved, the anti-skid performance is enhanced, the influence on the turning performance of the paver can be prevented or reduced, the energy utilization efficiency can be improved, and the energy consumption is reduced.

Description

Engineering machinery driving system and paver

Technical Field

The application relates to the technical field of engineering machinery, in particular to an engineering machinery driving system and a paver.

Background

At present, in the field of engineering machinery, a paver is one of the common road construction machines, and is used for road paving operation. Some pavers adopt four-wheel rear drive systems, but have the problem of poor adaptability to uneven road surfaces, so that the wheel-through slipping phenomenon easily occurs to influence the normal running of the pavers, and the turning performance of the four-wheel rear drive systems is poor to influence the running flexibility. The prior art provides a swing frame type rear wheel driving structure for a paver, and two rows of driving wheels can swing around a driving axle through a swing frame so as to improve the adaptability to a road surface.

Disclosure of Invention

According to an embodiment of the present invention, it is intended to improve at least one of technical problems existing in the prior art or the related art.

To this end, it is an object according to an embodiment of the present invention to provide a work machine drive system.

It is another object of an embodiment according to the present invention to provide a paving machine.

In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided a work machine driving system including: a drive axle; the first driving wheel of the first driving wheel set is in transmission connection with the drive axle through a first transmission mechanism; the second driving wheel set is rotatably connected with the first driving wheel set through a connecting mechanism and can realize lifting through rotation relative to the first driving wheel set; the second driving wheel of the second driving wheel set is connected with the first transmission mechanism through a second transmission mechanism, and the second transmission mechanism can be in transmission connection or disconnection with the first transmission mechanism.

According to an embodiment of the first aspect of the present invention, the engineering machine driving system includes a driving axle, a first driving wheel set, a second driving wheel set, a connecting mechanism, a first transmission mechanism and a second transmission mechanism. The drive axle is used for outputting power; the first driving wheel set and the second driving wheel set are respectively arranged on the rear side and the front side of the drive axle to form a front row and a rear row of driving wheel sets, and each row of driving wheel set can comprise two driving wheels to form a four-wheel drive mode. The second driving wheel set and the first driving wheel set form a rotating connection through the connecting mechanism, so that the second driving wheel set can rotate by taking the first driving wheel set as a center, the lifting motion of the second driving wheel set is realized, the working state of the second driving wheel set is adjusted according to different construction scenes, and the first driving wheel set can be driven independently or the second driving wheel set and the second driving wheel set are driven simultaneously.

The first driving wheel set is provided with a first driving wheel and is in transmission connection with the output end of the driving axle through a first transmission mechanism so as to drive the first driving wheel to rotate. The second driving wheel set is provided with a second driving wheel and is connected with the first transmission mechanism through a second transmission mechanism; the second transmission mechanism can be in transmission connection with the first transmission mechanism so as to take power through the first transmission mechanism and drive the second driving wheel to rotate; the second transmission mechanism can also be disconnected with the first transmission mechanism in a transmission way, so that when the second driving wheel is in a non-working position (the second driving wheel is lifted and leaves the ground), the second driving wheel is not required to be conveyed with power, the energy utilization efficiency is improved, and the energy consumption is reduced.

Taking the application of the engineering machinery driving system in the scheme to the paver as an example, when the paver is in the paving operation process, the second driving wheel set and the first driving wheel set can work together, so that the adhesive force between the tire and the ground is increased, the integral driving force and the anti-skid performance are enhanced, and when the road with an uneven road surface is met, the contact state of the second driving wheel set and the road surface can be adjusted at any time to prevent skidding; when the paver is in a non-operation process or a transition process, the second driving wheel set can be lifted, the paver is driven to run only through the first driving wheel set, so that the running flexibility is improved, the turning performance is improved, the driving force does not need to be conveyed to the second driving wheel, the energy utilization efficiency is improved, and the energy consumption is reduced.

The engineering machinery driving system in the scheme can be used for various engineering machinery such as a paver and the like, different driving modes can be adopted according to different construction scenes, the adaptability to different road surfaces can be effectively improved, the slippage is prevented, the driving flexibility of the engineering machinery is higher, and the influence on the turning performance can be prevented; in addition, the adjustable second transmission mechanism is adopted, so that the energy utilization efficiency is improved, and the energy consumption is reduced.

In addition, the driving system of the construction machine in the above technical solution provided in the embodiment of the present invention may further have the following additional technical features:

in the above technical solution, the second driving wheel set further includes: and the lifting mechanism is connected with the connecting mechanism and is used for driving the connecting mechanism to rotate relative to the first driving wheel set so as to enable the second driving wheel to carry out lifting motion.

In this technical scheme, through setting up the hoist mechanism who is connected with coupling mechanism to drive coupling mechanism through hoist mechanism and rotate for first drive wheelset, and then drive the second drive wheel and carry out elevating movement on direction of height, thereby realize the adjustment to the drive mode. When the lifting mechanism is assembled on the engineering machinery, the lifting mechanism can be connected with a frame of the engineering machinery so as to realize the fixation of the lifting mechanism.

In the above technical solution, the first driving wheel set includes two first driving wheels, which are respectively and correspondingly disposed at two ends of the driving axle; the second driving wheel set comprises two second driving wheels which are respectively arranged at the front sides of the two first driving wheels, and the inner side of each second driving wheel is provided with a connecting mechanism; the lifting mechanism comprises two lifting oil cylinders which are respectively arranged corresponding to the connecting mechanisms on the two sides, one end of each lifting oil cylinder is rotatably connected with the connecting mechanism, and the other end of each lifting oil cylinder extends to the upper part of the connecting mechanism and is used for being connected with a frame of the engineering machinery.

In this solution, the first drive wheel set comprises two first drive wheels and correspondingly the second drive wheel set comprises two second drive wheels. The two first driving wheels and the two second driving wheels are respectively arranged corresponding to two ends of the drive axle so as to be in transmission connection with the drive axle; the first driving wheel and the second driving wheel which are on the same side are rotatably connected with the same connecting mechanism, so that the second driving wheel and the first driving wheel are rotatably connected. The lifting oil cylinders are correspondingly arranged on the connecting mechanisms on the two sides respectively, one end of each lifting oil cylinder is rotatably connected with the connecting mechanism, the other end of each lifting oil cylinder is rotatably connected with the rack above the connecting mechanism, and the connecting mechanisms are driven to rotate around the first driving wheels through the telescopic movement of the lifting oil cylinders so as to drive the second driving wheels to perform lifting movement in the height direction.

In the technical scheme, each connecting mechanism is provided with at least one first limiting hole which is used for being matched with a limiting structure on the rack so as to limit the rotation of the connecting mechanism through the relative movement between the limiting structure and the first limiting hole; the first limiting hole is arranged along the circumferential direction by taking a rotating shaft of the first driving wheel as a center.

In this technical scheme, through set up first spacing hole on coupling mechanism to when assembling in engineering machine tool, cooperate with the limit structure in the frame, spacing through the limit structure who stretches into in the first spacing hole to coupling mechanism's rotation, so that the lift stroke of second drive wheel is injectd in a suitable within range. The first limiting hole can be a waist-shaped hole, and the extending direction of the first limiting hole is matched with the rotating arc line of the connecting mechanism, namely the first limiting hole is arranged in the circumferential direction by taking the rotating shaft of the first driving wheel as the center; the number of the first limiting holes can be one or more, and when a plurality of first limiting holes are arranged, the plurality of first limiting holes are arranged at intervals along the circumferential direction.

In the above technical solution, the first transmission mechanism includes two first sprocket mechanisms, each first sprocket mechanism includes a first driving wheel, a first driven wheel, a first transmission chain and a first driving shaft, the first driving wheel is connected to the output end of the driving axle, and the first driven wheel is connected to the first driving wheel through the first driving shaft; the second transmission mechanism comprises two second chain wheel mechanisms, each second chain wheel mechanism comprises a second driving wheel, a second driven wheel, a second transmission chain, a second driving shaft and a clutch, the second driven wheel is connected to the second driving wheel through the second driving shaft, and the clutch is arranged between the second driving wheel and the first driving shaft and used for enabling the second driving wheel and the first driving shaft to be in transmission connection or disconnection transmission connection.

In this solution, the first transmission mechanism comprises two first sprocket mechanisms and the second transmission mechanism comprises two second sprocket mechanisms. Specifically, two first chain wheel mechanisms are respectively arranged corresponding to the two first driving wheels, and each first chain wheel mechanism comprises a first driving wheel, a first driven wheel, a first transmission chain and a first driving shaft; the first transmission chain is meshed with the first driving wheel and the first driven wheel to realize chain transmission; the first driving wheel is connected with the output end of the driving axle, and the first driven wheel is connected with the first driving wheel through the first driving axle. When the drive axle works, power is transmitted to the first drive wheel through the first drive wheel, the first transmission chain, the first driven wheel and the first drive shaft, so that the first drive wheel rotates, and the engineering machinery is driven to run.

Similarly, two second chain wheel mechanisms are respectively arranged corresponding to the two second driving wheels, and each second chain wheel mechanism comprises a second driving wheel, a second driven wheel, a second transmission chain, a second driving shaft and a clutch. The second transmission chain is meshed with the second driving wheel and the second driven wheel to realize chain transmission; the second driven wheel is connected with the second driving wheel through a second driving shaft, the second driving wheel is connected to the first driving shaft, a clutch is arranged between the second driving wheel and the first driving shaft, and the transmission relation between the second driving wheel and the first driving shaft can be adjusted through connection or separation. When the second driving wheel and the first driving wheel work together, the second driving wheel and the first driving shaft form transmission connection through the clutch, and then power is transmitted to the second driving wheel through the second driving wheel, the second transmission chain, the second driven wheel and the second driving shaft, so that the second driving wheel rotates. When the second driving wheel rises and leaves the ground under the action of the lifting oil cylinder, the clutch can be separated, so that the second driving wheel is disconnected from the transmission connection with the first driving shaft, and the power transmission to the second driving wheel is stopped.

In the above technical solution, the engineering machinery driving system further includes: and the controller is electrically connected with the lifting mechanism and the clutch and is used for controlling the lifting mechanism and the clutch to work so as to disconnect the transmission connection between the second driving wheel and the first driving shaft after the second driving wheel leaves the ground.

In the technical scheme, the controller electrically connected with the lifting mechanism and the clutch is arranged and used for controlling the lifting mechanism and the clutch, so that the lifting mechanism is controlled to drive the second driving wheel to ascend or descend according to different working scenes and construction requirements of the engineering machinery, the clutch is controlled to perform corresponding actions, the second transmission mechanism and the first transmission mechanism are in transmission connection when the second driving wheel is in a working state, and the second transmission mechanism and the first transmission mechanism are disconnected when the second driving wheel is in a non-working state, and energy consumption is reduced.

In the above technical solution, the engineering machinery driving system further includes: a detector, provided corresponding to the second drive wheel, for detecting whether the second drive wheel is in a slipping state; the controller is electrically connected with the detector to control the lifting mechanism to work according to the detection result of the detector.

In this technical scheme, can detect the detector that the second drive wheel is in the state of skidding through the setting, and the detector is connected with the controller electricity to make the controller can directly control hoist mechanism and adjust the second drive wheel when the second drive wheel takes place to skid, with the adhesive force on increase second drive wheel and ground, improve anti-skidding performance, reduce and cause the influence to engineering machine tool's normal work.

In the above technical solution, the first transmission mechanism further includes a first tensioner, which is engaged with the first transmission chain and used for adjusting the tension state of the first transmission chain; the second transmission mechanism further comprises a second tensioner which is matched with the second transmission chain and is used for adjusting the tensioning state of the second transmission chain.

In the technical scheme, the first tensioning device matched with the first transmission chain is arranged in the first transmission mechanism to adjust the tensioning state of the first transmission chain, so that the first transmission chain is kept in a proper tensioning state, and the first transmission chain is prevented from being too loose or too tight to influence normal transmission. Similarly, a second tensioner is arranged in the second transmission mechanism and is matched with the second transmission chain so as to adjust the tensioning state of the second transmission chain and keep the second transmission chain in a proper tensioning state. When the tensioner is assembled on the engineering machine, the first tensioner and the second tensioner can be respectively installed on corresponding positions on the frame so as to be fixed.

In the above aspect, the second tensioner comprises: the mounting seat is arranged corresponding to the first transmission chain and is provided with a second limiting hole; the tensioning wheel is matched with the first transmission chain, one side of the tensioning wheel is provided with a limiting sliding block, and the limiting sliding block extends into the second limiting hole; and one end of the tensioning oil cylinder is connected with the mounting seat, and the other end of the tensioning oil cylinder is connected with the tensioning wheel and used for driving the tensioning wheel to slide along the extending direction of the second limiting hole so as to adjust the tensioning state of the first transmission chain.

In this technical scheme, the second tensioning ware includes mount pad, take-up pulley and tensioning cylinder. The mounting seat is fixedly connected with the rack and is arranged at a position corresponding to the first transmission chain; the both ends of tensioning hydro-cylinder are connected with mount pad and take-up pulley respectively, and the take-up pulley cooperatees with first driving chain to the position of take-up pulley is adjusted through the concertina movement of tensioning hydro-cylinder, and then changes the size of tensile force, realizes the adjustment to the tensioning state of first driving chain, need not to carry out manual adjustment, convenient and fast. The mounting seat is provided with a second limiting hole, one side of the tensioning wheel, which corresponds to the mounting seat, is provided with a limiting sliding block, and the limiting sliding block extends into the second limiting hole and can slide along the extending direction of the second limiting hole under the driving of the tensioning oil cylinder, so that the tensioning wheel is limited.

Furthermore, the engineering machinery driving system also comprises a tire pressure detection assembly, a pressure detection assembly and a pressure detection assembly, wherein the tire pressure detection assembly comprises a plurality of tire pressure sensors which are respectively arranged on the two second driving wheels and used for detecting the tire pressures of the second driving wheels; the controller is electrically connected with the tire pressure sensor, and when the second driving wheel and the first driving wheel work simultaneously, the controller controls the lifting mechanism to work according to the tire pressure of the second driving wheel so as to drive the second driving wheel to ascend or descend, so that the tire pressure of the second driving wheel meets the operation requirement and the occurrence of slipping is prevented.

The controller determines the current tire pressure condition according to the detection result of the tire pressure sensor, controls the lifting mechanism to drive the second driving wheel to descend when the tire pressure is smaller than the first tire pressure threshold value, controls the lifting mechanism to drive the second driving wheel to ascend when the tire pressure is larger than the second tire pressure threshold value, and controls the lifting mechanism to keep the current state when the tire pressure is larger than or equal to the first tire pressure threshold value and smaller than or equal to the second tire pressure threshold value. It can be understood that if the tire pressure of the second driving wheel is less than the first tire pressure threshold value, it indicates that the current tire pressure is insufficient, and the second driving wheel may slip in the operation process, at this time, the controller controls the lifting oil cylinder to extend out, and drives the second driving wheel to descend, so as to increase the pressure between the second driving wheel and the ground, and increase the tire pressure of the second driving wheel, so as to meet the operation requirement; if the tire pressure of the second driving wheel is greater than the second tire pressure threshold value, the tire pressure of the second driving wheel is over high, normal construction is not facilitated, and at the moment, the lifting mechanism is controlled to drive the second driving wheel to ascend so as to reduce the tire pressure of the second driving wheel; when the second driving wheel is between the first tire pressure threshold value and the second tire pressure threshold value, the tire pressure reaches the tire pressure range required by the operation, at the moment, the lifting mechanism is controlled to keep the current state without changing the height of the second driving wheel, so that the second driving wheel operates in the current tire pressure state. The first tire pressure threshold value is smaller than the second tire pressure threshold value, and the specific numerical value can be set according to the tire model of the second driving wheel and the specific construction requirement.

Furthermore, a tire pressure sensor is also arranged on the first driving wheel to detect the tire pressure of the first driving wheel, so that an operator can timely know the tire pressure state of the first driving wheel, and timely adjust the tire pressure of the first driving wheel when exceeding the normal tire pressure range.

An embodiment of a second aspect of the invention provides a paving machine comprising: the paver vehicle body is provided with a frame; in the engineering machine driving system according to any one of the embodiments of the first aspect, a drive axle of the engineering machine driving system is connected to the paver body, and the first drive wheel set of the engineering machine driving system is located on the rear side of the drive axle, and the second drive wheel set of the engineering machine driving system is located on the front side of the drive axle.

According to an embodiment of the second aspect of the invention, the paver comprises a paver body and a work machine drive system of any of the embodiments of the first aspect described above. The paver body is used as a main body of the paver, and the running of the paver body drives working devices (such as a screed plate, a hopper and the like) to move, so that paving operation is realized. A drive axle of the engineering machinery drive system is fixedly connected with the spreading machine body and extends along the transverse direction of the spreading machine body, and output ends are arranged at two ends of the drive axle. The first driving wheel set and the second driving wheel set of the engineering machinery driving system are arranged below the driving axle, and the second driving wheel set is positioned in front of the first driving wheel set.

The first driving wheel set is in transmission connection with the output end of the drive axle through a first transmission mechanism, and the second driving wheel set is connected with the first driving wheel set through a connecting mechanism and can rotate around the first driving wheel set to realize the lifting motion of the second driving wheel set so as to adjust the driving mode (such as the first driving wheel set is driven independently or the first driving wheel set and the second driving wheel set are driven simultaneously); the second driving wheel of the second driving wheel set is connected with the first transmission mechanism through a second transmission mechanism, and the second transmission mechanism can be in transmission connection or disconnection with the first transmission mechanism so as to be matched with the working state of the second driving wheel.

The paver in the scheme can adopt different driving modes according to different working scenes and construction requirements, can effectively improve the adaptability to different pavements, enhances the anti-skidding performance, prevents skidding, has higher driving flexibility and can prevent the influence on the turning performance; in addition, the transmission relation of the second driving wheel can be adjusted according to different working states of the second driving wheel, so that energy conservation and energy consumption reduction are facilitated.

In addition, the paver in the present embodiment also has all the beneficial effects of the engineering machine driving system in the embodiment of the first aspect, and details are not described here.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a schematic diagram of a portion of a work machine drive system according to one embodiment of the present disclosure;

FIG. 2 is a schematic diagram illustrating a partial configuration of a work machine drive system according to one embodiment of the present disclosure;

fig. 3 shows a schematic view of part of the structure of a paver according to one embodiment of the invention;

fig. 4 shows a top view of a portion of the structure of a paving machine in accordance with one embodiment of the invention;

fig. 5 shows a top view of a portion of the structure of a paving machine in accordance with one embodiment of the invention;

FIG. 6 shows a schematic view of a connection mechanism according to an embodiment of the invention;

FIG. 7 illustrates a top view of a coupling mechanism according to one embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a partial configuration of a work machine drive system according to one embodiment of the present disclosure;

FIG. 9 is a schematic diagram illustrating a partial configuration of a work machine drive system according to one embodiment of the present disclosure;

FIG. 10 is a schematic diagram illustrating a partial configuration of a work machine drive system according to one embodiment of the present disclosure;

FIG. 11 shows a schematic block diagram of the electrical connections of a controller according to one embodiment of the present invention;

FIG. 12 shows a schematic block diagram of electrical connections of a controller according to one embodiment of the present invention;

FIG. 13 shows a schematic block diagram of the electrical connections of a controller according to one embodiment of the present invention;

FIG. 14 shows a schematic of a second tensioner according to one embodiment of the present invention;

FIG. 15 shows a schematic of a second tensioner according to one embodiment of the present invention;

FIG. 16 shows a schematic of a second tensioner according to one embodiment of the present invention;

FIG. 17 illustrates a flow diagram of lift mechanism control logic according to one embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the names of the components in fig. 1 to 16 is as follows:

the construction machine comprises an engineering machine driving system, a 10 driving axle, a 11 first driving wheel set, a 111 first driving wheel, a 12 first transmission mechanism, a 121 first chain wheel mechanism, a 1211 first driving wheel, a 1212 first driven wheel, a 1213 first transmission chain, a 1214 first driving shaft, a 122 first tensioner, a 13 second driving wheel set, a 131 second driving wheel, a 132 lifting mechanism, a 1321 lifting oil cylinder, a 14 second transmission mechanism, a 141 second chain wheel mechanism, a 1411 second driving wheel, a 1412 second driven wheel, a 1413 second transmission chain, a 1414 second driving shaft, a 1415 clutch, a 142 second tensioner, an 1421 mounting seat, a 1422 tensioning oil cylinder, a 1423 tensioning wheel, a 1424 second limiting hole, a 1425 limiting sliding block, a 15 connecting mechanism, a 151 first limiting hole, a 152 first shaft hole, 153 second shaft hole, a 16 controller, a 17 detector, an 18 tire pressure sensor, a 2 paver, a 21 paver body and a 211 frame.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention, however, embodiments of the invention may be practiced otherwise than as specifically described herein, and the scope of the application is not limited by the specific embodiments disclosed below.

Work machine drive systems and paving machines according to some embodiments of the present disclosure are described below with reference to fig. 1-17.

It should be noted that the engineering machine driving system of the present invention may be used in various engineering machines such as a paver, and the engineering machine driving system of some embodiments of the present invention is described in the following first to eighth embodiments using a paver as an application scenario.

Example one

In the present embodiment, a driving system 1 of a construction machine is provided, and as shown in fig. 1, fig. 2 and fig. 3, the driving system 1 of the construction machine includes a driving axle 10, a first driving wheel set 11, a second driving wheel set 13, a connecting mechanism 15, a first transmission mechanism 12 and a second transmission mechanism 14.

The drive axle 10 is arranged on the paver body 21 and can output power outwards under the action of a drive device of the paver body 21; the first driving wheel set 11 is arranged at the rear side of the driving axle 10, and the second driving wheel set 13 is arranged at the front side of the driving axle 10 to form a front row of driving wheel sets and a rear row of driving wheel sets; the first driving wheel set 11 is provided with two first driving wheels 111 and the second driving wheel set 13 is provided with two second driving wheels 131 to form a four-wheel drive form.

The second driving wheel set 13 and the first driving wheel set 11 form a rotating connection through the connecting mechanism 15, and the second driving wheel set 13 can rotate by taking the rotating shaft of the first driving wheel set 11 as the center under the driving of the connecting mechanism 15, so that the lifting motion of the second driving wheel set 13 is realized. According to different construction scenes of the paver 2, the first driving wheel set 11 can be driven independently, and the second driving wheel set 13 can be driven simultaneously.

The first driving wheel 111 is in transmission connection with the output end of the drive axle 10 through a first transmission mechanism 12, and the second driving wheel 131 is in transmission connection with the first transmission mechanism 12 through a second transmission mechanism 14. The second transmission mechanism 14 can be in transmission connection with the first transmission mechanism 12 to take power through the first transmission mechanism 12 and drive the second driving wheel 131 to rotate, and the second transmission mechanism 14 can also be in transmission connection with the first transmission mechanism 12, so that when the second driving wheel 131 is in a non-working position (a state that the second driving wheel 131 is lifted up and leaves the ground), only the first transmission mechanism 12 works, and the second transmission mechanism 14 does not need to transmit power to the second driving wheel 131, so that energy consumption is reduced.

For example, when the paver 2 is in the paving operation process, the requirement on the adhesion between the driving wheel and the ground is high, and at this time, the second driving wheel 131 and the first driving wheel 111 can work together, so that the adhesion between the tire and the ground is increased, and the overall driving force and the anti-skid performance are enhanced; when the road surface is uneven, the contact state of the second driving wheel 131 and the road surface can be adjusted at any time through the lifting motion of the second driving wheel 131, so as to prevent slipping. When the paver 2 is in a non-operation process or a transition process, the paver 2 has no high requirement on the driving force, and at the moment, the second driving wheel 131 can be lifted to drive the paver 2 to run only through the first driving wheel 111, so that the running flexibility is improved, the turning performance is improved, the driving force does not need to be transmitted to the second driving wheel 131, and the second transmission mechanism 14 and the first transmission mechanism 12 can be disconnected in transmission.

The engineering machinery driving system 1 in the embodiment can adopt different driving modes according to different construction scenes, can effectively improve the adaptability to different road surfaces and prevent skidding, and meanwhile, the paver 2 has higher driving flexibility and can prevent or reduce the influence on the turning performance; in addition, the adjustable second transmission mechanism 14 is adopted, so that the energy utilization efficiency is improved, and the energy consumption is reduced.

Example two

The embodiment provides a driving system 1 of a construction machine, which is further improved on the basis of the first embodiment.

As shown in fig. 1 to fig. 3, the second driving wheel set 13 further includes a lifting mechanism 132, the lifting mechanism 132 is disposed corresponding to the connecting mechanism 15 and connected to the connecting mechanism 15, so that the lifting mechanism 132 drives the connecting mechanism 15 to rotate relative to the first driving wheel set 11, and further drives the second driving wheel 131 to perform lifting movement in the height direction, thereby adjusting the driving manner.

Wherein the lifting mechanism 132 may be coupled to the frame 211 of the paver body 21 to effect securement of the lifting mechanism 132 when assembled to the paver body 21.

EXAMPLE III

The embodiment provides a driving system 1 of the engineering machinery, and is further improved on the basis of the second embodiment.

As shown in fig. 1, 4 and 5, two first driving wheels 111 and two second driving wheels 131 are respectively disposed corresponding to two ends of the driving axle 10 so as to be in transmission connection with the driving axle 10; each second driving wheel 131 is provided with a connecting mechanism 15 on the inner side, and the first driving wheel 111 and the second driving wheel 131 which are positioned on the same side are rotatably connected with the same connecting mechanism 15, so that the second driving wheel 131 and the first driving wheel 111 form a rotating connection.

The lifting mechanism 132 includes two lifting cylinders 1321, which are respectively disposed corresponding to the connecting mechanisms 15 on both sides. One end of the lift cylinder 1321 is rotatably connected to the connecting mechanism 15, and the other end is rotatably connected to the frame 211 above the connecting mechanism 15. Through the telescopic motion of lift cylinder 1321, can make coupling mechanism 15 rotate around first drive wheel 111, when lift cylinder 1321 contracts, coupling mechanism 15 upwards rotates, drives second drive wheel 131 and rises, and when lift cylinder 1321 stretches out, coupling mechanism 15 rotates downwards, drives second drive wheel 131 and descends to realize that second drive wheel 131 carries out the elevating movement in the direction of height.

Example four

The embodiment provides a driving system 1 of the engineering machinery, and is further improved on the basis of the third embodiment.

As shown in fig. 5, 6 and 7, the connection mechanism 15 is provided with a first limiting hole 151 to cooperate with a limiting structure on the frame 211 when assembled to the paver body 21. Specifically, the first limiting holes 151 are kidney-shaped holes, and the number of the first limiting holes is two; the connecting mechanism 15 is further provided with a first shaft hole 152 and a second shaft hole 153 which are respectively used for connecting the first driving wheel 111 and the second driving wheel 131; the extending direction of each waist-shaped hole is matched with the rotating arc line of the connecting mechanism 15, and the two waist-shaped holes are arranged at intervals in the circumferential direction by taking the first shaft hole 152 as the center.

The frame 211 is provided with a limiting structure corresponding to the first limiting hole 151 and extends into the first limiting hole 151. When the connecting mechanism 15 is driven by the lift cylinder 1321 to rotate, the position of the first limiting hole 151 changes relative to the limiting structure, and when the limiting structure abuts against the end wall surface of the first limiting hole 151, the connecting mechanism 15 is limited, so that the lifting stroke of the connecting mechanism 15 is limited in a proper range.

It should be noted that the first limiting hole 151 may have other shapes, and the number may be one or other numbers greater than two.

EXAMPLE five

As shown in fig. 5, 8 and 9, the first transmission mechanism 12 includes two first sprocket mechanisms 121, and the second transmission mechanism 14 includes two second sprocket mechanisms 141.

Specifically, two first sprocket mechanisms 121 are respectively provided corresponding to the two first driving wheels 111, each first sprocket mechanism 121 including a first driving pulley 1211, a first driven pulley 1212, a first transmission chain 1213, and a first driving shaft 1214; the first transmission chain 1213 is engaged with a first driving wheel 1211 and a first driven wheel 1212, the first driving wheel 1211 is connected with the output end of the driving axle 10, and the first driven wheel 1212 is connected with the first driving wheel 111 through a first driving shaft 1214, so as to realize the transmission connection between the driving axle 10 and the first driving wheel 111. When the driving axle 10 operates, the driving axle 10 transmits power to the first driving wheel 111 through the first driving wheel 1211, the first transmission chain 1213, the first driven wheel 1212 and the first driving shaft 1214, so that the first driving wheel 111 rotates, and the paver body 21 is driven to travel.

As shown in fig. 9 and 10, two second sprocket mechanisms 141 are provided corresponding to the two second driving wheels 131, respectively, and each second sprocket mechanism 141 includes a second driving wheel 1411, a second driven wheel 1412, a second transmission chain 1413, a second driving shaft 1414, and a clutch 1415. The second transmission chain 1413 is meshed with a second driving wheel 1411 and a second driven wheel 1412, the second driven wheel 1412 is connected with the second driving wheel 131 through a second driving shaft 1414, and the second driving wheel 1411 is connected to the first driving shaft 1214; a clutch 1415 is provided between the second drive pulley 1411 and the first drive shaft 1214, and the clutch 1415 adjusts the transmission relationship between the second drive pulley 1411 and the first drive shaft 1214 through a connecting or disconnecting operation.

When the second driving wheel 131 and the first driving wheel 111 work together, the clutch 1415 enables the second driving wheel 1411 and the first driving shaft 1214 to form transmission connection, and further enables the second driving wheel 131 to rotate through the second driving wheel 1411, the second transmission chain 1413, the second driven wheel 1412 and the second driving shaft 1414 to transmit power to the second driving wheel 131. When the second driving wheel 131 rises and leaves the ground by the lift cylinder 1321, the second driving wheel 1411 can be disconnected from the first driving shaft 1214 by the disconnection operation of the clutch 1415, thereby stopping the power transmission to the second driving wheel 131.

EXAMPLE six

As shown in fig. 9 to 11, the work machine driving system 1 is further provided with a controller 16, and the controller 16 is electrically connected to the lifting mechanism 132 and the clutch 1415 for controlling the lifting mechanism 132 and the clutch 1415. The controller 16 can control the lifting mechanism 132 to drive the second driving wheel 131 to ascend or descend and control the clutch 1415 to perform corresponding actions according to different working scenes and construction requirements of the paver 2, so that the second transmission mechanism 14 is in transmission connection with the first transmission mechanism 12 when the second driving wheel 131 is in a working state, and the second transmission mechanism 14 is disconnected from the first transmission mechanism 12 when the second driving wheel 131 is in a non-working state, so as to reduce energy consumption.

Further, as shown in fig. 12, the engineering machine driving system 1 is further provided with a detector 17, and the detector 17 is electrically connected with the controller 16; the detector 17 can detect whether the second drive wheels 131 are in a slipping state, and can send the detection result to the controller 16. The controller 16 can directly control the lifting mechanism 132 to adjust the second driving wheel 131 when the second driving wheel 131 slips according to the detection result of the detector 17, so that the second driving wheel 131 descends, the adhesion between the second driving wheel 131 and the ground is increased, the anti-slip performance is improved, and the influence of the slip on the normal operation of the paver 2 is reduced.

EXAMPLE seven

The embodiment provides a driving system 1 of the engineering machinery, and further improvement is made on the basis of the sixth embodiment.

As shown in fig. 8 and 13, the engineering machine driving system 1 further includes a tire pressure detecting assembly including a plurality of tire pressure sensors 18 respectively provided on the two second driving wheels 131 for detecting the tire pressure of the second driving wheels 131; wherein, the controller 16 is electrically connected to the tire pressure sensor 18, when the second driving wheel 131 and the first driving wheel 111 work simultaneously, the controller 16 controls the lifting mechanism 132 to work according to the tire pressure of the second driving wheel to drive the second driving wheel 131 to ascend or descend, so that the tire pressure of the second driving wheel 131 meets the operation requirement to prevent the occurrence of a slip.

As shown in fig. 17, the controller 16 determines the current tire pressure condition according to the detection result of the tire pressure sensor 18, controls the lift cylinder 1321 to drive the second driving wheel to descend when the tire pressure is less than the first tire pressure threshold, controls the lift cylinder 1321 to drive the second driving wheel to ascend when the tire pressure is greater than the second tire pressure threshold, and controls the lift cylinder 1321 to maintain the current state when the tire pressure is greater than or equal to the first tire pressure threshold and less than or equal to the second tire pressure threshold. The first tire pressure threshold is smaller than the second tire pressure threshold, and the specific value can be set according to the tire model of the second driving wheel 131 and the specific construction requirement.

Further, as shown in fig. 8, an air pressure sensor 18 is also disposed on the first driving wheel 111 to detect the air pressure of the first driving wheel 111, so that an operator can know the air pressure state of the first driving wheel 111 in time to adjust the air pressure of the first driving wheel 111 in time when the air pressure exceeds the normal air pressure range.

Example eight

As shown in fig. 8 to 10, the first transmission mechanism 12 is further provided with a first tensioner 122 cooperating with the first transmission chain 1213, and the second transmission mechanism 14 is further provided with a second tensioner 142 cooperating with the second transmission chain 1413, so as to adjust the tensioning states of the first transmission chain 1213 and the second transmission chain 1413, respectively, so that the first transmission chain 1213 and the second transmission chain 1413 are kept in proper tensioning states, and the transmission chains are prevented from being too loose or too tight to affect normal transmission. The first tensioner 122 and the second tensioner 142 may be mounted to the frame 211 at corresponding locations for securing when assembled to the paver body 21.

Further, as shown in fig. 14, 15 and 16, the second tensioner 142 is a hydraulic tensioner, and includes a mounting seat 1421, a tension pulley 1423 and a tension cylinder 1422. The mounting seat 1421 is fixedly connected with the frame 211 and is arranged at a position corresponding to the first transmission chain 1213; two ends of the tensioning oil cylinder 1422 are respectively connected with the mounting seat 1421 and the tensioning wheel 1423, the tensioning wheel 1423 is matched with the first transmission chain 1213, so that the position of the tensioning wheel 1423 is adjusted through the telescopic movement of the tensioning oil cylinder 1422, the magnitude of the tensioning force is further changed, the tensioning state of the first transmission chain 1213 is adjusted, manual adjustment is not needed, and convenience and rapidness are achieved.

The mounting seat 1421 is provided with a second limiting hole 1424, one side of the tensioning wheel 1423 corresponding to the mounting seat 1421 is provided with a limiting slider 1425, and the limiting slider 1425 extends into the second limiting hole 1424 and can slide along the extending direction of the second limiting hole 1424 under the driving of the tensioning cylinder 1422, so as to limit the tensioning wheel 1423.

Further, the first tensioner 122 may be a mechanical tensioner as shown in fig. 8, but may also be a hydraulic tensioner.

A specific embodiment of the above-described work machine drive system 1 is provided below:

the embodiment provides an engineering machinery driving system 1, which comprises a driving axle 10, a first driving wheel set 11, a second driving wheel set 13, a connecting mechanism 15, a first transmission mechanism 12, a second transmission mechanism 14, a controller 16, a detector 17 and a tire pressure detecting component.

As shown in fig. 1, 2 and 3, the drive axle 10 is disposed on the paver body 21 and is capable of outputting power outwards under the action of a driving device of the paver body 21; the first driving wheel set 11 is arranged at the rear side of the driving axle 10, and the second driving wheel set 13 is arranged at the front side of the driving axle 10 to form a front row of driving wheel sets and a rear row of driving wheel sets; the first driving wheel set 11 is provided with two first driving wheels 111 and the second driving wheel set 13 is provided with two second driving wheels 131 to form a four-wheel drive form.

The second driving wheel set 13 and the first driving wheel set 11 form a rotating connection through the connecting mechanism 15, and the second driving wheel set 13 can rotate by taking the rotating shaft of the first driving wheel set 11 as the center under the driving of the connecting mechanism 15, so that the lifting motion of the second driving wheel set 13 is realized.

The first driving wheel 111 is in transmission connection with the output end of the drive axle 10 through a first transmission mechanism 12, and the second driving wheel 131 is in transmission connection with the first transmission mechanism 12 through a second transmission mechanism 14. The second transmission mechanism 14 can be in transmission connection with the first transmission mechanism 12 to take power through the first transmission mechanism 12 and drive the second driving wheel 131 to rotate, and the second transmission mechanism 14 can also be in transmission disconnection with the first transmission mechanism 12.

As shown in fig. 1 to fig. 3, the second driving wheel set 13 further includes a lifting mechanism 132, and the lifting mechanism 132 is connected to the connecting mechanism 15, and is configured to drive the connecting mechanism 15 to rotate relative to the first driving wheel set 11, so as to drive the second driving wheel 131 to perform lifting movement in the height direction, thereby implementing adjustment of the driving manner.

Specifically, as shown in fig. 1, 4 and 5, two first driving wheels 111 and two second driving wheels 131 are respectively disposed corresponding to two ends of the driving axle 10 so as to be in transmission connection with the driving axle 10; each second driving wheel 131 is provided with a connecting mechanism 15 on the inner side, and the first driving wheel 111 and the second driving wheel 131 which are positioned on the same side are rotatably connected with the same connecting mechanism 15, so that the second driving wheel 131 and the first driving wheel 111 form a rotating connection.

The lifting mechanism 132 includes two lifting cylinders 1321, which are respectively disposed corresponding to the connecting mechanisms 15 on both sides. One end of the lift cylinder 1321 is rotatably connected to the connecting mechanism 15, and the other end is rotatably connected to the frame 211 above the connecting mechanism 15. Through the telescopic motion of lift cylinder 1321, can make coupling mechanism 15 rotate around first drive wheel 111, when lift cylinder 1321 contracts, coupling mechanism 15 upwards rotates, drives second drive wheel 131 and rises, and when lift cylinder 1321 stretches out, coupling mechanism 15 rotates downwards, drives second drive wheel 131 and descends.

As shown in fig. 5, 6 and 7, the connecting mechanism 15 is provided with first limiting holes 151, and the first limiting holes 151 are waist-shaped holes, and the number of the first limiting holes 151 is two; the connecting mechanism 15 is further provided with a first shaft hole 152 and a second shaft hole 153 which are respectively used for connecting the first driving wheel 111 and the second driving wheel 131; the extending direction of each waist-shaped hole is matched with the rotating arc line of the connecting mechanism 15, and the two waist-shaped holes are arranged at intervals in the circumferential direction by taking the first shaft hole 152 as the center.

As shown in fig. 9 to 12, the controller 16 is electrically connected with the lifting mechanism 132, the clutch 1415, and the detector 17; the detector 17 can detect whether the second drive wheels 131 are slipping, and the controller 16 can control the lift mechanism 132 and the clutch 1415 based on the detection result of the detector 17. According to different working scenes and different construction requirements of the paver 2, the controller 16 controls the lifting mechanism 132 to drive the second driving wheel 131 to ascend or descend, and controls the clutch 1415 to perform corresponding actions.

When the second driving wheel 131 is in the working state, the controller 16 controls the clutch 1415 to perform a connection operation, so that the second driving wheel 1411 is in transmission connection with the first driving shaft 1214, and further, power is transmitted to the second driving wheel 131 through the second driving wheel 1411, the second transmission chain 1413, the second driven wheel 1412 and the second driving shaft 1414, so that the second driving wheel 131 rotates. When the second driving wheel 131 slips, the controller 16 controls the lifting mechanism 132 to adjust the second driving wheel 131, so that the second driving wheel 131 descends, the adhesion between the second driving wheel 131 and the ground is increased, the anti-slip performance is improved, and the influence of the slip on the normal operation of the paver 2 is reduced. When the second driving wheel 131 is in the non-operating state, the controller 16 controls the lifting mechanism 132 to drive the second driving wheel 131 to ascend, and controls the clutch 1415 to perform the disengaging operation, so that the second transmission mechanism 14 is disconnected from the first transmission mechanism 12, and the power transmission to the second driving wheel 131 is stopped, thereby reducing the energy consumption.

As shown in fig. 8 and 13, the tire air pressure detecting assembly includes a plurality of tire air pressure sensors 18 respectively provided on the two second driving wheels 131 for detecting the tire air pressure of the second driving wheels 131; wherein, the controller 16 is electrically connected to the tire pressure sensor 18, when the second driving wheel 131 and the first driving wheel 111 work simultaneously, the controller 16 controls the lifting mechanism 132 to work according to the tire pressure of the second driving wheel to drive the second driving wheel 131 to ascend or descend, so that the tire pressure of the second driving wheel 131 meets the operation requirement to prevent the occurrence of a slip.

Further, a tire pressure sensor 18 is also disposed on the first driving wheel 111 to detect the tire pressure of the first driving wheel 111, so that an operator can know the tire pressure state of the first driving wheel 111 in time to adjust the tire pressure of the first driving wheel 111 in time when the tire pressure exceeds a normal tire pressure range.

As shown in fig. 8 to 10, the first transmission mechanism 12 is further provided with a first tensioner 122 cooperating with the first transmission chain 1213, and the second transmission mechanism 14 is further provided with a second tensioner 142 cooperating with the second transmission chain 1413, so as to adjust the tensioning states of the first transmission chain 1213 and the second transmission chain 1413, respectively, so that the first transmission chain 1213 and the second transmission chain 1413 are kept in proper tensioning states, and the transmission chains are prevented from being too loose or too tight to affect normal transmission. The first tensioner 122 and the second tensioner 142 may be mounted to the frame 211 at corresponding locations for securing when assembled to the paver body 21. Wherein the first tensioner 122 is a mechanical tensioner and the second tensioner 142 is a hydraulic tensioner.

Specifically, as shown in fig. 14, 15, and 16, the second tensioner 142 includes a mount 1421, a tension pulley 1423, and a tension cylinder 1422. The mounting seat 1421 is fixedly connected with the frame 211 and is arranged at a position corresponding to the first transmission chain 1213; two ends of the tensioning oil cylinder 1422 are respectively connected with the mounting seat 1421 and the tensioning wheel 1423, the tensioning wheel 1423 is matched with the first transmission chain 1213, so that the position of the tensioning wheel 1423 is adjusted through the telescopic movement of the tensioning oil cylinder 1422, the magnitude of the tensioning force is further changed, the tensioning state of the first transmission chain 1213 is adjusted, manual adjustment is not needed, and convenience and rapidness are achieved. The mounting seat 1421 is provided with a second limiting hole 1424, one side of the tensioning wheel 1423 corresponding to the mounting seat 1421 is provided with a limiting slider 1425, and the limiting slider 1425 extends into the second limiting hole 1424 and can slide along the extending direction of the second limiting hole 1424 under the driving of the tensioning cylinder 1422, so as to limit the tensioning wheel 1423.

When the paver 2 is in the paving operation process, the requirement on the adhesion force between the driving wheels and the ground is high, and at the moment, the second driving wheels 131 and the first driving wheels 111 can work together, so that the adhesion force between the tires and the ground is increased, and the overall driving force and the anti-skid performance are enhanced; when the road surface is uneven, the contact state of the second driving wheel 131 and the road surface can be adjusted at any time through the lifting motion of the second driving wheel 131, so as to prevent slipping. When the paver 2 is in a non-operation process or a transition process, the paver 2 has no high requirement on the driving force, and at the moment, the second driving wheel 131 can be lifted to drive the paver 2 to run only through the first driving wheel 111, so that the running flexibility is improved, the turning performance is improved, the driving force does not need to be transmitted to the second driving wheel 131, and the second transmission mechanism 14 and the first transmission mechanism 12 can be disconnected in transmission.

Example nine

In the present embodiment, a paver 2 is provided, as shown in fig. 1 to 5, the paver 2 includes a paver body 21 and the engineering machine driving system 1 in any one of the above embodiments.

The paver body 21 serves as a main body of the paver 2 and may be provided with working devices, such as a screed, a hopper, etc.; the working device travels with the paver body 21 to perform paving work. The drive axle 10 of the engineering machinery drive system 1 is fixedly connected with the paver body 21 and extends along the transverse direction of the paver body 21, and two ends of the drive axle are output ends. The first driving wheel set 11 and the second driving wheel set 13 of the engineering machinery driving system 1 are arranged below the driving axle 10, and the second driving wheel set 13 is positioned in front of the first driving wheel set 11.

The first driving wheel set 11 is in transmission connection with the output end of the drive axle 10 through a first transmission mechanism 12; the second driving wheel set 13 is connected with the first driving wheel set 11 through a connecting mechanism 15 and can rotate around the first driving wheel set 11 to realize the lifting motion of the second driving wheel set 13 so as to adjust the driving mode and realize the independent driving of the first driving wheel set 11 or the simultaneous driving of the first driving wheel set 11 and the second driving wheel set 13; the second driving wheel 131 of the second driving wheel set 13 is connected to the first transmission mechanism 12 through the second transmission mechanism 14, wherein the second transmission mechanism 14 can be in transmission connection or disconnection from the first transmission mechanism 12 to adapt to the working state of the second driving wheel 131, so as to stop power transmission to the second driving wheel 131 when the second driving wheel 131 is in a non-working state.

The paver 2 in the embodiment can adopt different driving modes according to different working scenes and construction requirements, can effectively improve the adaptability to different road surfaces, enhances the anti-skidding performance, prevents skidding, has higher driving flexibility and can prevent or reduce the influence on the turning performance, and the anti-skidding performance is enhanced; in addition, the transmission relationship of the second driving wheel 131 can be adjusted according to the different working states of the second driving wheel 131, which is beneficial to saving energy and reducing energy consumption.

In addition, the paver 2 in this embodiment also has all the beneficial effects of the engineering machine driving system 1 in any of the above embodiments, and details are not described here.

One specific embodiment of the present application is provided below:

a floating type engineering machinery driving system comprises an axle, a driving chain a, a chain wheel b, a rear wheel system a, a driving shaft system a, a tensioning device a, a linkage device, a driving chain b, a tensioning device b, a lifting oil cylinder, a chain wheel c, a rear wheel system b, a driving shaft system b and the like.

A power transmission route: the chain wheels on the axle are connected with the chain wheel a through a driving chain a, and a certain transmission ratio exists between the two chain wheels. At this time, the driving shaft system a is driven to rotate, the rear wheel system a is driven to rotate, at this time, the chain wheel b synchronously rotates due to the coaxial relation, and the chain wheel b is connected with the chain wheel c by using the transmission chain b. Through chain transmission, the chain wheel c is driven to rotate around the driving shaft system b, and the rear wheel system b synchronously rotates due to the coaxial relation.

When the rear wheel system b is designed to be connected with the rear wheel system a bracket, a linkage device is specially designed. When the rear wheel system b goes up and down, the linkage device rotates around the pivot. And the linking device is provided with a waist-shaped hole, so that the rear wheel system b rotates around an arc line in the lifting process, and the lifting is convenient.

The back wheel system b all can appear the not hard up of chain in the lift process, need take up the chain this moment, because of back wheel system a is fixed, so adopt mechanical adjustment formula overspeed device tensioner a here. The rear wheel system b needs to float and for convenience a hydraulic one-key tensioner b is designed.

The engineering machinery driving system is driven by a lifting oil cylinder arranged on the linkage device. When the rear wheel system b is far away from the ground, so that the steering is convenient and energy-saving, the lifting oil cylinder is only required to move upwards to drive the linkage device to rotate upwards around the fulcrum; when the rear wheel system b is required to contact the ground, the adhesive force is increased, and the slipping problem is solved, the lifting oil cylinder is only required to move downwards, and the linkage device is driven to rotate downwards around the fulcrum. The operation is convenient.

For energy-conservation, when the paver normally works or when the paver is in the process of transition, the lifting oil cylinder is used to rotate around the support through the linkage device, so that the rear wheel system b is lifted, the rear wheel system b is far away from the working surface, and the clutch is separated through the control of the electric control system, so that only the chain wheel c of the rear wheel system rotates on the shaft at the moment, and other components are in a relatively static state.

The technical scheme of some embodiments of the invention is described in detail in the above with reference to the attached drawings, different driving modes can be adopted according to different construction scenes, the adaptability to different road surfaces can be effectively improved, the skid is prevented, and meanwhile, the running flexibility of the paver is higher, and the influence on the turning performance can be prevented; in addition, the adjustable second transmission mechanism is adopted, so that the energy utilization efficiency is improved, and the energy consumption is reduced.

In embodiments of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical aspects of the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the technical solution of the present invention, and it is obvious to those skilled in the art that various modifications and changes can be made to the technical solution of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the technical scheme of the application shall be included in the protection scope of the application.

Claims

1. A work machine drive system (1), comprising:

a drive axle (10);

the first driving wheel set (11), a first driving wheel (111) of the first driving wheel set (11) is in transmission connection with the drive axle (10) through a first transmission mechanism (12);

the second driving wheel set (13) is in rotary connection with the first driving wheel set (11) through a connecting mechanism (15), and can be lifted through rotation relative to the first driving wheel set (11);

the second driving wheel (131) of the second driving wheel set (13) is connected with the first transmission mechanism (12) through a second transmission mechanism (14), and the second transmission mechanism (14) can be in transmission connection or disconnection with the first transmission mechanism (12).

2. The work machine drive system (1) of claim 1, wherein the second drive wheel set (13) further comprises:

and the lifting mechanism (132) is connected with the connecting mechanism (15) and is used for driving the connecting mechanism (15) to rotate relative to the first driving wheel set (11) so as to enable the second driving wheel (131) to carry out lifting motion.

3. Work machine drive system (1) according to claim 2,

the first driving wheel set (11) comprises two first driving wheels (111) which are correspondingly arranged at two ends of the driving axle (10) respectively;

the second driving wheel set (13) comprises two second driving wheels (131) which are respectively arranged at the front sides of the two first driving wheels (111), and the inner side of each second driving wheel (131) is provided with one connecting mechanism (15);

the lifting mechanism (132) comprises two lifting oil cylinders (1321) which are arranged correspondingly to the connecting mechanism (15) on two sides respectively, one end of each lifting oil cylinder (1321) is rotatably connected with the connecting mechanism (15), and the other end of each lifting oil cylinder extends to the upper portion of the connecting mechanism (15) and is used for connecting a frame of the engineering machinery.

4. Work machine drive system (1) according to claim 3,

each connecting mechanism (15) is provided with at least one first limiting hole (151) which is used for being matched with a limiting structure on the rack so as to limit the rotation of the connecting mechanism (15) through the relative movement between the limiting structure and the first limiting hole (151);

the first limiting hole (151) is arranged along the circumferential direction by taking a rotating shaft of the first driving wheel (111) as a center.

5. Work machine drive system (1) according to claim 3,

the first transmission mechanism (12) comprises two first chain wheel mechanisms (121), each first chain wheel mechanism (121) comprises a first driving wheel (1211), a first driven wheel (1212), a first transmission chain (1213) and a first driving shaft (1214), the first driving wheel (1211) is connected to the output end of the driving axle (10), and the first driven wheel (1212) is connected to the first driving wheel (111) through the first driving shaft (1214);

the second transmission mechanism (14) comprises two second chain wheel mechanisms (141), each second chain wheel mechanism (141) comprises a second driving wheel (1411), a second driven wheel (1412), a second transmission chain (1413), a second driving shaft (1414) and a clutch (1415), the second driven wheel (1412) is connected to the second driving wheel (131) through the second driving shaft (1414), and the clutch (1415) is arranged between the second driving wheel (1411) and the first driving shaft (1214) and used for enabling the second driving wheel (1411) and the first driving shaft (1214) to be in transmission connection or disconnection.

6. The work machine drive system (1) of claim 5, further comprising:

a controller (16) electrically connected to the lifting mechanism (132) and the clutch (1415) for controlling the lifting mechanism (132) and the clutch (1415) to work to disconnect the transmission connection between the second driving wheel (1411) and the first driving shaft (1214) after the second driving wheel (131) leaves the ground.

7. The work machine drive system (1) of claim 6, further comprising:

a detector (17) provided in correspondence with the second drive wheel (131) for detecting whether the second drive wheel (131) is in a slipping state;

wherein the controller (16) is electrically connected with the detector (17) to control the lifting mechanism (132) to work according to the detection result of the detector (17).

8. Work machine drive system (1) according to claim 4,

the first transmission mechanism (12) further comprises a first tensioner (122) cooperating with the first transmission chain (1213) for adjusting the tension of the first transmission chain (1213);

the second transmission mechanism (14) further comprises a second tensioner (142) which is matched with the second transmission chain (1413) and is used for adjusting the tension state of the second transmission chain (1413).

9. The work machine drive system (1) of claim 8, wherein the second tensioner (142) comprises:

the mounting seat (1421) is arranged corresponding to the first transmission chain (1213), and a second limiting hole (1424) is formed in the mounting seat (1421);

the tensioning wheel (1423) is matched with the first transmission chain (1213), a limiting sliding block (1425) is arranged on one side of the tensioning wheel (1423), and the limiting sliding block (1425) extends into the second limiting hole (1424);

and one end of the tensioning oil cylinder (1422) is connected with the mounting seat (1421), and the other end of the tensioning oil cylinder is connected with the tensioning wheel (1423) and used for driving the tensioning wheel (1423) to slide along the extending direction of the second limiting hole (1424) so as to adjust the tensioning state of the first transmission chain (1213).

10. A paver (2), characterized in that it comprises:

the paver vehicle body (21), the paver vehicle body (21) is provided with a frame;

the work machine drive system (1) of any of claims 1 to 9, the drive axle (10) of the work machine drive system (1) being connected to the paver body (21), and the first drive wheel set (11) of the work machine drive system (1) being located at the rear side of the drive axle (10) and the second drive wheel set (13) being located at the front side of the drive axle (10).