Rear drive system of paver and paver

Abstract

The present application provides a rear drive system for a paver and a paver. The rear drive system for the paver includes: a drive axle; a first drive wheel group, which is arranged at the rear side of the drive axle and is connected to the drive axle through a first transmission mechanism; a second drive wheel group, which is arranged at the front side of the drive axle and is connected to the drive axle through a second transmission mechanism; a lifting mechanism, one end of which is connected to the second drive wheel group, and the other end is used to connect to the frame of the paver, and the lifting mechanism can drive the second drive wheel group to perform lifting and lowering movements. In the technical solution of the present application, different driving modes can be adopted according to different construction needs and road conditions, which can effectively improve the adaptability to different road surfaces and prevent slipping. At the same time, the paver has higher driving flexibility and can prevent the turning performance from being affected. In addition, the two rows of drive wheel groups respectively adopt independent transmission mechanisms to prevent mutual interference, so as to reduce the impact on construction efficiency and construction progress.

Description

Technical Field

[0001] The present application relates to the technical field of paving machines, and in particular to a rear drive system of a paving machine and a paving machine. Background Art

[0002] At present, pavers are one of the most common road construction machines used for road paving operations. The body of a paver is usually rear-wheel drive. In order to improve the anti-skid performance of the rear wheels and the adaptability to the road surface, some pavers use a four-wheel rear drive system, but there are problems such as poor turning performance and poor adaptability to uneven roads, which affects the flexibility of the paver. Figure 1 As shown, the prior art provides a swing-frame rear wheel drive structure 300 for a paver, and two rows of drive wheels can swing around the drive bridge through the swing frame 301 to improve the adaptability to the road surface. However, the rear drive structure in this scheme is relatively complex. When swinging, the front and rear rows of drive wheels move simultaneously, and the improvement effect on the adaptability to the road surface is limited. There is still a problem of poor flexibility, and the front and rear drive wheels on the same side are driven by a set of sprocket mechanisms. If one of the drive wheels or the transmission chain fails, the front and rear drive wheels cannot operate normally, affecting the normal construction operation of the paver. Summary of the invention

[0003] According to the embodiments of the present invention, it is intended to improve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, an object according to an embodiment of the present invention is to provide a rear drive system for a paving machine.

[0005] Another object of an embodiment of the present invention is to provide a paving machine.

[0006] In order to achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a rear drive system of a paver is provided, comprising: a drive axle; a first drive wheel group, arranged on the rear side of the drive axle and connected to the drive axle through a first transmission mechanism; a second drive wheel group, arranged on the front side of the drive axle and connected to the drive axle through a second transmission mechanism; a lifting mechanism, one end of which is connected to the second drive wheel group and the other end is used to connect to the frame of the paver, and the lifting mechanism can drive the second drive wheel group to perform lifting and lowering movements.

[0007] According to an embodiment of the first aspect of the present invention, a rear drive system of a paver includes a drive axle, a first drive wheel set, a second drive wheel set, a first transmission mechanism, a second transmission mechanism, and a lifting mechanism. The drive axle is used to output power; the first drive wheel set and the second drive wheel set are respectively arranged at the rear side and the front side of the drive axle to form two rows of drive wheel sets front and rear. Each row of drive wheel sets may include two drive wheels, and a four-wheel drive form can be formed. Among them, the first drive wheel set is driven by the first transmission mechanism between it and the drive axle, and the second drive wheel set is driven by the second transmission mechanism between it and the drive axle, so that the first drive wheel set and the second drive wheel set respectively have independent transmission mechanisms, and there is no mutual influence between the two rows of drive wheel sets.

[0008] The lifting mechanism is used to drive the second drive wheel set to move up and down. When assembled on the paver, one end of the lifting mechanism is connected to the second drive wheel set, and the other end is connected to the frame of the paver, so as to drive the second drive wheel set to rise or fall relative to the road surface through the action of the lifting mechanism, and the drive mode can be adjusted according to different construction requirements and different road surface conditions.

[0009] For example, when the paver is in the paving operation process, the second drive wheel set can be driven to descend, so that the second drive wheel set and the first drive wheel set work together to increase the driving force and enhance the anti-slip performance at the same time. When encountering uneven road conditions, the contact state between the second drive wheel set and the road surface can also be adjusted at any time through the lifting mechanism to prevent slipping; when the paver is in the non-operation process or the transfer process, the second drive wheel set can be driven to rise through the lifting mechanism, and the paver can be driven to travel only through the first drive wheel set to improve the driving flexibility and the turning performance.

[0010] In the rear drive system of the paver in this solution, different drive modes can be adopted according to different construction needs and road surface conditions, which can effectively improve the adaptability to different road surfaces, prevent slipping, and at the same time, the paver has higher driving flexibility and can prevent affecting the turning performance; in addition, the two rows of drive wheel sets respectively adopt independent transmission mechanisms. When any one of the drive wheel sets fails, the other drive wheel set can still drive the paver to travel normally, which can effectively reduce the impact on the construction efficiency and construction progress.

[0011] In addition, the rear drive system of the paver in the above technical solution provided in the embodiment of the present invention may further have the following additional technical features:

[0012] In the above technical solution, the first drive wheel set includes two first drive wheels, which are respectively arranged corresponding to the two ends of the drive axle; the second drive wheel set includes two second drive wheels, which are respectively arranged in front of the two first drive wheels; among them, under the drive of the lifting mechanism, the second drive wheel can move forward during the rising process and can move backward during the descending process.

[0013] In this technical solution, the first driving wheel set includes two first driving wheels. Correspondingly, the second driving wheel set includes two second driving wheels. The two first driving wheels and the two second driving wheels are respectively arranged corresponding to the two ends of the driving axle, so as to be in transmission connection with the driving axle; the second driving wheel is located on the front side of the first driving wheel, and the lifting mechanism can drive the second driving wheel to move forward simultaneously during the ascending process, that is, the second driving wheel can move forward and upward relative to the first driving wheel. On the one hand, it can be adapted to the connection mode of the second transmission mechanism, and on the other hand, it can prevent the second driving wheel from interfering with the first driving wheel during the lifting process.

[0014] In the above technical solution, the lifting mechanism includes: two sliding members, which are respectively arranged on the inner sides of the two second driving wheels and can be connected to the frame. Each sliding member is provided with a sliding groove and a sliding block in sliding fit, and the sliding block is rotatably connected to the corresponding second driving wheel; two lifting cylinders, which are respectively arranged corresponding to the two sliding members. One end of each lifting cylinder is connected to the sliding block on the same side to drive the sliding block and the second driving wheel to move.

[0015] In this technical solution, the lifting mechanism includes two sliding members and two lifting cylinders. The sliding member is provided with a sliding groove and a sliding block, and the sliding block is in sliding fit with the sliding groove; one sliding member is arranged on the inner side of each second driving wheel, and the sliding member is connected to the frame of the paver. The second driving wheel is rotatably connected to the sliding block to realize the connection between the second driving wheel and the frame through the sliding member. Wherein, the second driving wheel can rotate relative to the sliding member, and at the same time, the second driving wheel can slide relative to the sliding groove along with the sliding block. Each lifting cylinder is arranged corresponding to one sliding member, and one end of the lifting cylinder is connected to the sliding block, and the other end extends forward and is connected to the frame of the paver to drive the sliding block to slide relative to the sliding groove through the telescopic movement of the lifting cylinder, thereby driving the second driving wheel to move up and down.

[0016] 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 and a first transmission chain. 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; the second transmission mechanism includes two second sprocket mechanisms. Each second sprocket mechanism includes a second driving wheel, a second driven wheel and a second transmission chain. The second driving wheel is connected to the output end of the driving axle, and the second driven wheel is connected to the second driving wheel.

[0017] In this technical solution, the first transmission mechanism includes two first sprocket mechanisms, and the second transmission mechanism includes two second sprocket mechanisms. Specifically, the two first sprocket mechanisms are respectively arranged corresponding to the two first drive wheels. Each first sprocket mechanism includes a first driving wheel, a first driven wheel, and a first transmission chain. The first transmission chain meshes with the first driving wheel and the first driven wheel to achieve chain drive. The first driving wheel is connected to the output end of the drive axle, and the first driven wheel is connected to the first drive wheel. When the drive axle works, power is transmitted to the first drive wheel through the first driving wheel, the first transmission chain, and the first driven wheel, causing the first drive wheel to rotate, and then driving the paver to travel.

[0018] Similarly, the two second sprocket mechanisms are respectively arranged corresponding to the two second drive wheels. Each second sprocket mechanism includes a second driving wheel, a second driven wheel, and a second transmission chain. The second transmission chain meshes with the second driving wheel and the second driven wheel to achieve chain drive. The second driving wheel is connected to the output end of the drive axle, and the second driven wheel is connected to the second drive wheel. When the drive axle works, power is transmitted to the second drive wheel through the second driving wheel, the second transmission chain, and the second driven wheel, causing the second drive wheel to rotate.

[0019] In the above technical solution, the first transmission mechanism further includes a first tensioner, and the first tensioner cooperates with the first transmission chain. The first drive wheel set further includes a telescopic mechanism. The telescopic mechanism includes two telescopic cylinders, which are respectively arranged inside the two first drive wheels. One end of each telescopic cylinder is connected to the first drive wheel on the same side, and the other end is used to be connected to the frame. Wherein, the telescopic cylinder is used to drive the first drive wheel to move back and forth, and adjust the tension state of the first transmission chain through the first tensioner.

[0020] In this technical solution, by setting the first tensioner and the telescopic mechanism, the tension state of the first transmission chain is adjusted to prevent the first transmission chain from loosening, which is beneficial to ensuring that the first sprocket mechanism can transmit power normally. Among them, the telescopic mechanism specifically includes two telescopic cylinders, which are respectively arranged corresponding to the inside of a first drive wheel. One end of the telescopic cylinder is connected to the first drive wheel, and the other end extends backward and is connected to the frame of the paver. Through the telescopic movement of the telescopic cylinder, the first drive wheel is driven to move in the front-back direction, so as to change the pressure of the first tensioner on the first transmission chain, adjust the tension state of the first transmission chain, and ensure that the first sprocket mechanism can drive normally.

[0021] In the above technical solution, the second transmission mechanism further includes a second tensioner. The second tensioner is provided with a movable tensioning wheel, and the tensioning wheel cooperates with the second transmission chain to adjust the tension state of the second transmission chain.

[0022] In this technical solution, a second tensioner is provided to cooperate with the second transmission chain. By using the movement of the tensioning wheel on the second tensioner relative to the second transmission chain, the magnitude of the tension force acting on the second transmission chain is adjusted to achieve the adjustment of the tension state of the second transmission chain, so that the second transmission chain can always maintain an appropriate tension state during the lifting process of the second driving wheel, thus avoiding affecting normal transmission.

[0023] In the above technical solution, the rear drive system of the paver further includes a controller, which is electrically connected to the lifting mechanism and the telescopic mechanism and is used to control the operation of the lifting mechanism and the telescopic mechanism.

[0024] In this technical solution, a controller is provided to be electrically connected to the lifting mechanism and the telescopic mechanism to control the lifting mechanism and the telescopic mechanism, and further control the telescopic movement of the lifting cylinder and the telescopic cylinder, so as to adjust the positions of the first driving wheel and the second driving wheel respectively.

[0025] In the above technical solution, the rear drive system of the paver further includes a tire pressure detection component, which includes a plurality of tire pressure sensors respectively arranged on the two second driving wheels and is used to detect the tire pressure of the second driving wheels. Among them, the controller is electrically connected to the tire pressure sensors. When the second driving wheel set and the first driving wheel set work simultaneously, the controller controls the lifting mechanism to work according to the tire pressure of the second driving wheels to drive the second driving wheels to rise or fall.

[0026] In this technical solution, a tire pressure detection component is provided to detect the tire pressure of the driving wheels. The tire pressure detection component specifically includes a plurality of tire pressure sensors. By respectively arranging tire pressure sensors on the two second driving wheels, the tire pressures of the two second driving wheels are respectively detected. The tire pressure sensors are electrically connected to the controller to transmit the detection results to the controller. When the second driving wheel set and the first driving wheel set work simultaneously, the controller determines the current tire pressure condition according to the detection results of the tire pressure sensors and can correspondingly control the lifting mechanism according to the tire pressure condition to drive the second driving wheels to rise and fall, so that the tire pressure of the second driving wheels meets the operation requirements and prevents slipping.

[0027] In the above technical solution, the controller determines the tire pressure of the second driving wheels according to the detection results of the tire pressure sensors. When the tire pressure is less than the first tire pressure threshold, the controller controls the lifting mechanism to drive the second driving wheels to descend. When the tire pressure is greater than the second tire pressure threshold, the controller controls the lifting mechanism to drive the second driving wheels to rise. 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 controller controls the lifting mechanism to maintain the current state.

[0028] In this technical solution, the controller compares the tire pressure of the second drive wheel with the tire pressure threshold according to the detection result of the tire pressure sensor. If the tire pressure of the second drive wheel is less than the first tire pressure threshold, it indicates that the current tire pressure is insufficient and the second drive wheel may slip during the operation. At this time, the controller controls the lifting cylinder to extend and drive the second drive wheel to descend to increase the pressure between the second drive wheel and the ground and increase the tire pressure of the second drive wheel to meet the operation requirements; if the tire pressure of the second drive wheel is greater than the second tire pressure threshold, it indicates that the tire pressure of the second drive wheel is too high, which is not conducive to normal construction. At this time, the lifting mechanism is controlled to drive the second drive wheel to rise to reduce the tire pressure of the second drive wheel; when the second drive wheel is between the first tire pressure threshold and the second tire pressure threshold, it indicates that the tire pressure reaches the tire pressure range required for the operation. At this time, there is no need to change the height of the second drive wheel. The lifting mechanism is controlled to maintain the current state so that the second drive wheel operates under the current tire pressure state. Among them, the first tire pressure threshold is less than the second tire pressure threshold, and the specific value can be set according to the tire model of the second drive wheel and the specific construction requirements.

[0029] Furthermore, a tire pressure sensor may be provided on the first drive wheel to detect the tire pressure of the first drive wheel, so that the operator can promptly know the tire pressure status of the first drive wheel and make timely adjustments when the tire pressure of the first drive wheel exceeds the normal tire pressure range.

[0030] In an embodiment of the second aspect of the present invention, a paver is provided, comprising: a paver body, the paver body being provided with a frame; a paver rear drive system of any one of the embodiments of the first aspect above, arranged at the rear of the paver body, the drive axle of the paver rear drive system being connected to the paver body, and the lifting mechanism of the paver rear drive system extending from one end of the second drive wheel group to the front side of the second drive wheel group and being connected to the frame.

[0031] According to an embodiment of the second aspect of the present invention, a paver includes a paver body and a paver rear drive system of any one of the embodiments of the first aspect. The paver body is the main body of the paver, and the paver body drives the working device (such as an ironing plate, a hopper, etc.) to move through the movement of the paver body, thereby realizing the paving operation. The paver rear drive system is located at the rear of the paver body, and specifically includes a drive axle, a first drive wheel set, a second drive wheel set, a first transmission mechanism, a second transmission mechanism and a lifting mechanism; the drive axle is fixedly connected to the paver body and extends in the lateral direction of the paver body, with both ends being output ends; the first drive wheel set and the second drive wheel set are arranged below the drive axle, and the second drive wheel set is located in front of the first drive wheel set, and the first drive wheel set and the second drive wheel set are respectively connected to the output end of the drive axle through the first transmission mechanism and the second transmission mechanism, so as to drive the first drive wheel set and the second drive wheel set to rotate through the drive axle, thereby driving the paver body to travel.

[0032] Among them, the lifting mechanism is located on the front side of the second driving wheel set, and the lifting mechanism is connected to the frame and the second driving wheel set. The second driving wheel set can be driven by the lifting mechanism to move up and down to adapt to different road conditions. At the same time, different driving methods can be adopted according to different construction requirements of the paver. For example, the second driving wheel set can be lifted so that the first driving wheel set drives the paver body to travel alone, or the second driving wheel set can be lowered and in contact with the ground so that the second driving wheel set and the first driving wheel set drive the paver body to travel together.

[0033] In the paver of this solution, different driving methods can be adopted according to different construction needs and road surface conditions, which can effectively improve the adaptability to different road surfaces, prevent slipping, and at the same time, the paver has higher driving flexibility and can prevent the impact on the turning performance. In addition, the two rows of driving wheel sets respectively adopt independent transmission mechanisms. When any one of the driving wheel sets fails, the other driving wheel set can still drive the paver to travel normally, which can effectively reduce the impact on the construction efficiency and progress.

[0034] In addition, the paver in this solution also has all the beneficial effects of the rear drive system of the paver in the embodiment of the first aspect above, which will not be elaborated here.

[0035] In the embodiments of the present invention, the additional aspects and advantages will become obvious in the following description part, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In the embodiments of the present invention, the above and / or additional aspects and advantages will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0037] Figure 1 Shows a schematic diagram of a swing-frame rear-wheel drive structure in the prior art;

[0038] Figure 2 Shows a schematic diagram of the rear drive system of a paver according to an embodiment of the present invention;

[0039] Figure 3 Shows a schematic diagram of a partial structure of a paver according to an embodiment of the present invention;

[0040] Figure 4 Shows a schematic diagram of the rear drive system of a paver according to an embodiment of the present invention;

[0041] Figure 5 Shows a schematic diagram of a partial structure of the rear drive system of a paver according to an embodiment of the present invention;

[0042] Figure 6 Shows a top view of a partial structure of a paver according to an embodiment of the present invention;

[0043] Figure 7 shows a schematic block diagram of the electrical connection relationship of a controller according to an embodiment of the present invention;

[0044] Figure 8 shows a flowchart of the lifting mechanism control logic according to an embodiment of the present invention.

[0045] Among them, Figures 1 to 7 the corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0046] 1 Rear drive system of the paver, 10 Drive axle, 11 First drive wheel set, 111 First drive wheel, 112 Telescopic mechanism, 1121 Telescopic oil cylinder, 12 First transmission mechanism, 121 First sprocket mechanism, 1211 First driving sprocket, 1212 First driven sprocket, 1213 First transmission chain, 122 First tensioner, 13 Second drive wheel set, 131 Second drive wheel, 14 Second transmission mechanism, 141 Second sprocket mechanism, 1411 Second driving sprocket, 1412 Second driven sprocket, 1413 Second transmission chain, 142 Second tensioner, 15 Lifting mechanism, 151 Lifting oil cylinder, 152 Sliding member, 1521 Slide block, 16 Controller, 17 Tire pressure detection assembly, 171 Tire pressure sensor, 2 Paver, 21 Paver body, 211 Frame, 300 Swing frame type rear wheel drive structure, 301 Swing frame. Detailed implementation manners

[0047] In order to more clearly understand the above objects, features and advantages in the embodiments according to the present invention, the embodiments according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0048] In the following description, many specific details are set forth in order to fully understand the embodiments according to the present invention. However, the embodiments according to the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0049] Next, refer to Figures 2 to 8 to describe the rear drive system of the paver and the paver according to some embodiments of the present invention.

[0050] Embodiment 1

[0051] In this embodiment, a rear drive system 1 of a paver is provided, as shown in Figure 2 and Figure 3As shown in the figure, the rear drive system 1 of the paver includes a drive axle 10, a first drive wheel set 11, a second drive wheel set 13, a first transmission mechanism 12, a second transmission mechanism 14, and a lifting mechanism 15.

[0052] The drive axle 10 is provided on the paver body 21 and can output power outward under the drive of the drive device of the paver body 21; the first drive wheel set 11 is provided at the rear side of the drive axle 10, and the second drive wheel set 13 is provided at the front side of the drive axle 10 to form two rows of drive wheel sets front and back. The first drive wheel set 11 and the second drive wheel set 13 respectively have independent transmission mechanisms, that is, the first drive wheel set 11 is connected to the drive axle 10 through the first transmission mechanism 12 in a transmission connection, and the second drive wheel set 13 is connected to the drive axle 10 through the second transmission mechanism 14 in a transmission connection to prevent mutual influence between the two rows of drive wheel sets. Among them, each row of drive wheel sets can include two drive wheels, and a four-wheel drive form can be formed.

[0053] The lifting mechanism 15 is used to drive the second drive wheel set 13 to perform lifting movement. One end of the lifting mechanism 15 is connected to the second drive wheel set 13, and the other end is connected to the frame 211 of the paver body 21; when the lifting mechanism 15 works, it can drive the second drive wheel set 13 to rise or fall relative to the road surface, so as to adjust the drive mode of the paver body 21 according to different construction requirements and different road surface conditions, and can make the paver body 21 form a single-row drive wheel drive or a double-row drive wheel drive.

[0054] For example, when the paver 2 is in the paving operation process, the requirement for the adhesion between the drive wheels and the ground is relatively high. At this time, the second drive wheel set 13 can be driven to descend through the lifting mechanism 15, so that the second drive wheel set 13 and the first drive wheel set 11 work together to increase the driving force of the paver body 21 and enhance the anti-slip performance at the same time; when encountering a road condition with uneven road surface, the contact state between the second drive wheel set 13 and the road surface can also be adjusted at any time through the lifting mechanism 15 to prevent slipping. When the paver 2 is in the non-operation process or the transfer process, usually the requirement for the driving force of the paver body 21 is different. At this time, the second drive wheel set 13 can be driven to rise through the lifting mechanism 15, and only the first drive wheel set 11 is used to drive the paver body 21 to travel, which can effectively improve the driving flexibility and improve the turning performance of the paver body 21.

[0055] The rear drive system 1 of the paver in this embodiment can adopt different driving modes according to different construction needs of the paver 2 and different road conditions, which can effectively improve the adaptability to different road surfaces, effectively prevent slipping, and improve the driving flexibility and turning performance of the paver 2. In addition, the two rows of driving wheel sets respectively adopt independent transmission mechanisms. When any driving wheel set fails, the other driving wheel set can still drive the paver 2 to travel normally, which can effectively reduce the impact on construction efficiency and construction progress.

[0056] Embodiment 2

[0057] This embodiment provides a rear drive system 1 for a paver, which is further improved on the basis of the first embodiment.

[0058] like Figures 2 to 4 As shown, the first driving wheel set 11 includes two first driving wheels 111 , and the second driving wheel set 13 includes two second driving wheels 131 .

[0059] Specifically, the two first drive wheels 111 and the two second drive wheels 131 are respectively arranged corresponding to the two ends of the drive bridge 10, so as to be connected to the output end of the drive bridge 10 through transmission; the second drive wheel 131 is located at the front side of the first drive wheel 111, and the lifting mechanism 15 can drive the second drive wheel 131 to move forward at the same time during the rising process, that is, the second drive wheel 131 can move toward the front and upper part of the first drive wheel 111 under the drive of the lifting mechanism 15 to adapt to the connection method of the second transmission mechanism 14, so that the second drive wheel 131 always maintains the same distance with the drive bridge 10 during the lifting process, and at the same time, it can also prevent the second drive wheel 131 from interfering with the first drive wheel 111 during the lifting process.

[0060] Embodiment 3

[0061] This embodiment provides a rear drive system 1 for a paver, which is further improved on the basis of the second embodiment.

[0062] like Figures 2 to 5 As shown, the lifting mechanism 15 includes two sliding members 152 and two lifting cylinders 151. A sliding member 152 is provided on the inner side of each second driving wheel 131, and the sliding member 152 is provided with a slide groove and a slider 1521, and the slider 1521 is slidably matched with the slide groove and can slide along the slide groove; the sliding member 152 is connected to the frame 211 of the paving machine body 21 for fixing, and the second driving wheel 131 is rotatably connected with the slider 1521 and can rotate relative to the sliding member 152, and at the same time, the second driving wheel 131 can also slide relative to the slide groove along with the slider 1521.

[0063] A lifting oil cylinder 151 is provided on the front side of each sliding member 152. One end of the lifting oil cylinder 151 is connected to the slider 1521, and the other end extends forward and is connected to the frame 211 of the paver body 21. When the lifting oil cylinder 151 contracts, it drives the slider 1521 to slide relative to the chute, thereby driving the second driving wheel 131 to move forward and upward, realizing the lifting of the second driving wheel 131. Conversely, when the lifting oil cylinder 151 extends, the slider 1521 drives the second driving wheel 131 to move in the reverse direction, realizing the lowering of the second driving wheel 131.

[0064] Embodiment 4

[0065] In this embodiment, a rear drive system 1 of a paver is provided, which is further improved on the basis of Embodiment 3.

[0066] As Figures 2 to 5 shown, the first transmission mechanism 12 includes two first sprocket mechanisms 121, and the second transmission mechanism 14 includes two second sprocket mechanisms 141.

[0067] Specifically, the two first sprocket mechanisms 121 are respectively arranged corresponding to the two first driving wheels 111. The first sprocket mechanism 121 specifically includes a first driving wheel 1211, a first driven wheel 1212, and a first transmission chain 1213. The first transmission chain 1213 meshes with the first driving wheel 1211 and the first driven wheel 1212. The first driving wheel 1211 is connected to the output end of the drive axle 10, and the first driven wheel 1212 is connected to the first driving wheel 111 to realize chain transmission between the drive axle 10 and the first driving wheel 111. When the drive axle 10 works, the drive axle 10 transmits power to the first driving wheel 111 through the first driving wheel 1211, the first transmission chain 1213, and the first driven wheel 1212, causing the first driving wheel 111 to rotate, and then driving the paver body 21 to travel.

[0068] The two second sprocket mechanisms 141 are respectively arranged corresponding to the two second driving wheels 131. Similarly, the second sprocket mechanism 141 includes a second driving wheel 1411, a second driven wheel 1412, and a second transmission chain 1413. The second transmission chain 1413 meshes with the second driving wheel 1411 and the second driven wheel 1412. The second driving wheel 1411 is connected to the output end of the drive axle 10, and the second driven wheel 1412 is connected to the second driving wheel 131 to realize chain transmission between the drive axle 10 and the second driving wheel 131. When the drive axle 10 works, power is transmitted to the second driving wheel 131 through the second driving wheel 1411, the second transmission chain 1413, and the second driven wheel 1412, causing the second driving wheel 131 to rotate. When the second driving wheel 131 contacts the ground, the drive axle 10 can drive the first driving wheel 111 and the second driving wheel 131 to rotate respectively, and drive the paver body 21 to travel in a four-wheel drive mode.

[0069] Further, the second transmission mechanism 14 further includes a second tensioner 142. The second tensioner 142 is provided with a movable tensioning wheel, which cooperates with the second transmission chain 1413. By using the movement of the tensioning wheel relative to the second transmission chain 1413, the magnitude of the tension force acting on the second transmission chain 1413 is adjusted, so as to adjust the tension state of the second transmission chain 1413, so that during the lifting process of the second driving wheel 131, the second transmission chain 1413 can always maintain an appropriate tension state to avoid affecting normal transmission.

[0070] Embodiment Five

[0071] In this embodiment, a rear drive system 1 of a paver is provided, which is further improved on the basis of Embodiment Four.

[0072] As Figures 2 to 5 shown, the first transmission mechanism 12 is further provided with a first tensioner 122 that cooperates with the first transmission chain 1213. The first driving wheel set 11 is further provided with a telescopic mechanism 112 for adjusting the first driving wheel 111, so as to adjust the tension state of the first transmission chain 1213 by using the telescopic mechanism 112 and the first tensioner 122 to prevent the first transmission chain 1213 from loosening. The first tensioner 122 is connected to the position on the frame 211 corresponding to the first transmission chain 1213 and cooperates with the first transmission chain 1213. The telescopic mechanism 112 specifically includes two telescopic cylinders 1121, which are respectively arranged corresponding to the inner sides of one first driving wheel 111; one end of the telescopic cylinder 1121 is connected to the first driving wheel 111, and the other end extends backward and is connected to the frame 211 of the paver body 21. Through the telescopic movement of the telescopic cylinder 1121, the first driving wheel 111 is driven to move in the front-rear direction, so as to change the pressure magnitude of the first tensioner 122 acting on the first transmission chain 1213 and adjust the tension state of the first transmission chain 1213 to ensure the normal transmission of the first sprocket mechanism 121.

[0073] Embodiment Six

[0074] In this embodiment, a rear drive system 1 of a paver is provided, which is further improved on the basis of Embodiment Two.

[0075] As Figure 2 、 Figure 5 and Figure 6 shown, the rear drive system 1 of the paver further includes a controller 16. The controller 16 is electrically connected to the lifting mechanism 15 and the telescopic mechanism 112, and can control the lifting mechanism 15 and the telescopic mechanism 112 respectively. Furthermore, by controlling the operation of the lifting cylinder 151, the second driving wheel 131 is driven to perform a lifting movement, and by controlling the operation of the telescopic cylinder 1121, the first driving wheel 111 is driven to perform a front-rear movement, so as to realize the position adjustment of the first driving wheel 111 and the second driving wheel 131.

[0076] Furthermore, the rear drive system 1 of the paver further includes a tire pressure detection component 17. Specifically, the tire pressure detection component 17 includes a plurality of tire pressure sensors 171. A tire pressure sensor 171 is provided on each second drive wheel 131 to detect the tire pressure of each second drive wheel 131 respectively. The tire pressure sensor 171 is electrically connected to the controller 16 to transmit the detection result to the controller 16. When the second drive wheel group and the first drive wheel group work simultaneously, the controller 16 determines the current tire pressure condition according to the detection result of the tire pressure sensor 171, and correspondingly controls the lifting mechanism 15 to drive the second drive wheel 131 to move up and down, so that the tire pressure of the second drive wheel 131 meets the operation requirements to prevent slipping.

[0077] Specifically, as Figure 8 shown, the controller 16 compares the tire pressure of the second drive wheel 131 with the first tire pressure threshold and the second tire pressure threshold according to the detection result of the tire pressure sensor 171 to judge whether the tire pressure of the second drive wheel 131 meets the operation requirements. Among them, the first tire pressure threshold is less than the second tire pressure threshold. If the tire pressure of the second drive wheel 131 is less than the first tire pressure threshold, it indicates that the current tire pressure is insufficient, and the second drive wheel 131 may slip during the operation. At this time, the controller 16 controls the lifting oil cylinder 151 to extend to drive the second drive wheel 131 to descend, so as to increase the pressure between the second drive wheel 131 and the ground and increase the tire pressure of the second drive wheel 131 to meet the operation requirements. If the tire pressure of the second drive wheel 131 is greater than the second tire pressure threshold, it means that the tire pressure of the second drive wheel 131 is too high, which is not conducive to normal construction. At this time, the control lifting mechanism 15 drives the second drive wheel 131 to rise to reduce the tire pressure of the second drive wheel 131. If the tire pressure of the second drive wheel 131 is greater than or equal to the first tire pressure threshold and less than or equal to the second tire pressure threshold, it means that the tire pressure reaches the tire pressure range required for operation. At this time, there is no need to change the height of the second drive wheel 131, and the control lifting mechanism 15 is kept in the current state to maintain the pressure of the second drive wheel 131, so that the second drive wheel 131 rotates under the current tire pressure state.

[0078] Even further, a tire pressure sensor 171 can also be provided on the first drive wheel 111 to detect the tire pressure of the first drive wheel 111, so that the operator can timely know the tire pressure state of the first drive wheel 111 and make timely adjustments when the tire pressure of the first drive wheel 111 exceeds the normal tire pressure range.

[0079] The following provides a specific embodiment of the rear drive system 1 of the above paver:

[0080] In this embodiment, a rear drive system 1 of a paver is provided, which includes a drive axle 10, a first drive wheel set 11, a second drive wheel set 13, a first transmission mechanism 12, a second transmission mechanism 14, a lifting mechanism 15, a controller 16, and a tire pressure detection component 17.

[0081] As Figure 2 and Figure 3 shown, the drive axle 10 is arranged on the paver body 21 and can output power outward under the drive of the drive device of the paver body 21; the first drive wheel set 11 is arranged at the rear side of the drive axle 10, and the second drive wheel set 13 is arranged at the front side of the drive axle 10 to form two rows of drive wheel sets, front and rear. As Figure 4 shown, the first drive wheel set 11 includes two first drive wheels 111, and the second drive wheel set 13 includes two second drive wheels 131. The two first drive wheels 111 and the two second drive wheels 131 are respectively arranged corresponding to the two ends of the drive axle 10 to facilitate the transmission connection with the output end of the drive axle 10.

[0082] As Figures 2 to 5 shown, the lifting mechanism 15 includes two sliding members 152 and two lifting cylinders 151. One sliding member 152 is arranged inside each second drive wheel 131. The sliding member 152 is provided with a chute and a slider 1521, and the slider 1521 is in sliding fit with the chute and can slide along the chute; the sliding member 152 is connected to the frame 211 of the paver body 21 for fixation, and the second drive wheel 131 is rotatably connected to the slider 1521 and can rotate relative to the sliding member 152. At the same time, the second drive wheel 131 can also slide relative to the chute along with the slider 1521.

[0083] One lifting cylinder 151 is arranged at the front side of each sliding member 152. One end of the lifting cylinder 151 is connected to the slider 1521, and the other end extends forward and is connected to the frame 211 of the paver body 21; when the lifting cylinder 151 contracts, it drives the slider 1521 to slide relative to the chute, thereby driving the second drive wheel 131 to move forward and upward to realize the lifting of the second drive wheel 131. On the contrary, when the lifting cylinder 151 extends, the slider 1521 drives the second drive wheel 131 to move in the reverse direction to realize the lowering of the second drive wheel 131.

[0084] As Figures 2 to 5 shown, the first transmission mechanism 12 includes two first sprocket mechanisms 121 and two first tensioners 122, and the second transmission mechanism 14 includes two second sprocket mechanisms 141 and two second tensioners 142.

[0085] The first sprocket mechanism 121 specifically includes a first driving wheel 1211, a first driven wheel 1212 and a first drive chain 1213. The first drive chain 1213 meshes with the first driving wheel 1211 and the first driven wheel 1212. The first driving wheel 1211 is connected to the output end of the drive axle 10, and the first driven wheel 1212 is connected to the first driving wheel 111 to achieve chain drive between the drive axle 10 and the first driving wheel 111. Similarly, the second sprocket mechanism 141 includes a second driving wheel 1411, a second driven wheel 1412 and a second drive chain 1413. The second drive chain 1413 meshes with the second driving wheel 1411 and the second driven wheel 1412. The second driving wheel 1411 is connected to the output end of the drive axle 10, and the second driven wheel 1412 is connected to the second driving wheel 131 to achieve chain drive between the drive axle 10 and the second driving wheel 131. When the drive axle 10 is working, power is transmitted to the second driving wheel 131 through the second sprocket mechanism 141, and power is transmitted to the first driving wheel 111 through the first sprocket mechanism 121 to prevent mutual influence between the front and rear rows of drive wheel sets.

[0086] As Figure 5 and Figure 6 shown, the first tensioner 122 is connected to the position on the frame 211 corresponding to the first drive chain 1213, and each first drive chain 1213 cooperates with a first tensioner 122. Each telescopic oil cylinder 1121 is correspondingly arranged inside a first driving wheel 111. One end of the telescopic oil cylinder 1121 is connected to the first driving wheel 111, and the other end extends backward and is connected to the frame 211 of the paver body 21. Through the telescopic movement of the telescopic oil cylinder 1121, the first driving wheel 111 is driven to move in the front and rear directions to change the pressure of the first tensioner 122 acting on the first drive chain 1213 and adjust the tension state of the first drive chain 1213 to ensure the normal transmission of the first sprocket mechanism 121.

[0087] The second tensioner 142 is correspondingly arranged with the second drive chain 1413. The second tensioner 142 is provided with a movable tensioning wheel and cooperates with the second drive chain 1413. By using the movement of the tensioning wheel relative to the second drive chain 1413, the magnitude of the tension force acting on the second drive chain 1413 is adjusted to achieve the adjustment of the tension state of the second drive chain 1413.

[0088] As Figure 6 and Figure 7As shown, the controller 16 is electrically connected to the lifting mechanism 15 and the telescopic mechanism 112, and can control the lifting cylinder 151 and the telescopic cylinder 1121 respectively. Further, by controlling the operation of the lifting cylinder 151, the second drive wheel 131 is driven to move up and down, and by controlling the operation of the telescopic cylinder 1121, the first drive wheel 111 is driven to move back and forth, so as to realize the position adjustment of the first drive wheel 111 and the second drive wheel 131.

[0089] When the paver 2 is in the paving operation process, the requirement for the adhesion between the drive wheels and the ground is relatively high. At this time, the second drive wheel 131 can be driven to descend by the lifting cylinder 151, so that the second drive wheel 131 and the first drive wheel 111 work together to increase the driving force of the paver body 21 and enhance the anti-slip performance at the same time; when encountering uneven road conditions, the contact state between the second drive wheel 131 and the road surface can also be adjusted at any time by the lifting cylinder 151 to prevent slipping. When the paver 2 is in the non-operation process or the transfer process, usually the requirements for the driving force of the paver body 21 are different. At this time, the second drive wheel set 13 can be driven to rise by the lifting cylinder 151, and the paver body 21 can be driven to travel only by the first drive wheel 111, which can effectively improve the driving flexibility and improve the turning performance of the paver body 21.

[0090] As Figures 5 to 7 shown, the tire pressure detection component 17 specifically includes a plurality of tire pressure sensors 171. A tire pressure sensor 171 is provided on each second drive wheel 131 to detect the tire pressure of each second drive wheel 131 respectively. The tire pressure sensor 171 is electrically connected to the controller 16 to transmit the detection result to the controller 16; when the second drive wheel set 13 and the first drive wheel set 11 work simultaneously, the controller 16 determines the current tire pressure condition according to the detection result of the tire pressure sensor 171, and controls the lifting mechanism 15 accordingly to drive the second drive wheel 131 to move up and down, so that the tire pressure of the second drive wheel 131 meets the operation requirements to prevent slipping.

[0091] Specifically, as Figure 8As shown, the controller 16 compares the tire pressure of the second driving wheel 131 with the first tire pressure threshold and the second tire pressure threshold according to the detection result of the tire pressure sensor 171 to determine whether the tire pressure of the second driving wheel 131 meets the operation requirements. Among them, the first tire pressure threshold is less than the second tire pressure threshold. If the tire pressure of the second driving wheel 131 is less than the first tire pressure threshold, it indicates that the current tire pressure is insufficient, and the second driving wheel 131 may slip during the operation. At this time, the controller 16 controls the lifting oil cylinder 151 to extend to drive the second driving wheel 131 to descend, so as to increase the pressure between the second driving wheel 131 and the ground and increase the tire pressure of the second driving wheel 131 to meet the operation requirements; if the tire pressure of the second driving wheel 131 is greater than the second tire pressure threshold, it means that the tire pressure of the second driving wheel 131 is too high, which is not conducive to normal construction. At this time, the lifting mechanism 15 is controlled to drive the second driving wheel 131 to rise to reduce the tire pressure of the second driving wheel 131; if the tire pressure of the second driving wheel 131 is greater than or equal to the first tire pressure threshold and less than or equal to the second tire pressure threshold, it means that the tire pressure reaches the tire pressure range required for operation. At this time, there is no need to change the height of the second driving wheel 131, and the lifting mechanism 15 is controlled to maintain the current state to maintain the pressure of the second driving wheel 131, so that the second driving wheel 131 operates under the current tire pressure state.

[0092] Furthermore, a tire pressure sensor 171 can also be set on the first driving wheel 111 to detect the tire pressure of the first driving wheel 111, so that the operator can timely know the tire pressure state of the first driving wheel 111 and make timely adjustments when the tire pressure of the first driving wheel 111 exceeds the normal tire pressure range.

[0093] The rear drive system 1 of the paver in this embodiment can respectively adjust the positions of the first driving wheel group 11 and the second driving wheel group 13, so as to adopt different driving methods according to different construction needs of the paver 2 and different road surface conditions, which can effectively improve the adaptability to different road surfaces, effectively prevent the occurrence of slipping phenomena, and the driving flexibility and turning performance of the paver 2 are higher. In addition, the two rows of driving wheel groups respectively adopt independent transmission mechanisms. When any one of the driving wheel groups fails, the other driving wheel group can still drive the paver 2 to run normally, which can effectively reduce the impact on the construction efficiency and construction progress.

[0094] Embodiment Seven

[0095] In this embodiment, a paver 2 is provided, as Figure 2 、 Figure 3 and Figure 6 shown, the paver 2 includes a paver body 21 and the rear drive system 1 of the paver in any of the above embodiments.

[0096] The paver body 21 is the main body of the paver 2, and can be provided with working devices, such as a screed plate, a hopper, etc. The working devices travel with the paver body 21 to perform paving operations. The paver rear drive system 1 is located at the rear of the paver body 21, and specifically includes a drive axle 10, a first drive wheel set 11, a second drive wheel set 13, a first transmission mechanism 12, a second transmission mechanism 14, and a lifting mechanism 15. The driving axle 10 is fixedly connected to the paving machine body 21 and extends in the lateral direction of the paving machine body 21, with both ends being output ends; the first driving wheel set 11 and the second driving wheel set 13 are arranged below the driving axle 10, and the first driving wheel set 11 is located at the rear side of the driving axle 10, and the second driving wheel set 13 is located at the front side of the driving axle 10, and the first driving wheel set 11 and the second driving wheel set 13 are respectively connected to the output end of the driving axle 10 through the first transmission mechanism 12 and the second transmission mechanism 14, so as to drive the first driving wheel set 11 and the second driving wheel set 13 to rotate through the driving axle 10, thereby driving the paving machine body 21 to move.

[0097] The lifting mechanism 15 is located at the front side of the second driving wheel group 13, and one end of the lifting mechanism 15 is connected to the frame 211 of the paver body 21, and the other end is connected to the second driving wheel group 13. The second driving wheel group 13 can be driven by the lifting mechanism 15 to perform lifting movements to adapt to different road conditions. At the same time, different driving methods can be adopted according to different construction requirements of the paver 2.

[0098] Furthermore, if Figure 4 As shown, the first driving wheel set 11 includes two first driving wheels 111, and the second driving wheel set 13 includes two second driving wheels 131. When the second driving wheel 131 rises, the first driving wheel 111 drives the paving machine body 21 to travel, which is suitable for the paving machine 2 in a non-operating state or in a transfer process; when the second driving wheel 131 drops and contacts the ground, the second driving wheel 131 and the first driving wheel 111 drive the paving machine body 21 to travel together, forming a four-wheel drive form with stronger driving force, which is suitable for paving operation.

[0099] The paver 2 in this embodiment can adopt different driving modes according to different construction needs and road conditions, which can effectively improve the adaptability to different road surfaces and prevent slipping. At the same time, the paver 2 has higher driving flexibility and can prevent the turning performance from being affected. In addition, the two rows of driving wheel groups respectively adopt independent transmission mechanisms. When any driving wheel group fails, the other driving wheel group can still drive the paver 2 to run normally, which can effectively reduce the impact on construction efficiency and construction progress.

[0100] In addition, the paver 2 in this embodiment also has all the beneficial effects of the paver rear drive system 1 in any of the above embodiments, which will not be repeated here.

[0101] A specific embodiment of the present application is provided as follows:

[0102] The front wheels in the rear drive system of the paver are designed to be liftable, and the rear wheels are designed to be adjustable; enabling the four rear wheels to touch the ground simultaneously, increasing the tire driving force; the front wheels in the rear drive are connected to the fuselage through lifting cylinders, and the front wheels and the fuselage achieve up-and-down swinging through fixed chutes. The rear wheels can achieve front-and-rear sliding through telescopic cylinders.

[0103] When slipping occurs during operation, the lifting cylinder acts to press the tire, increasing the adhesion of the tire to the ground and changing the driving force of the tire. A tire pressure sensor is installed inside the tire, and by transmitting tire pressure monitoring parameters, the pressure of the lifting cylinder is adaptively adjusted.

[0104] Specifically, the first drive wheel set, the lifting cylinder, and the chute are fixed on the fuselage, and the second drive wheel set is connected to the lifting cylinder. Power is transmitted to the second drive wheel set and the first drive wheel set through the axle and the chain. The lifting cylinder drives the second drive wheel set to slide up and down in the chute. At the same time, the chain is brought into a suitable tension state by adjusting the tensioning device.

[0105] The tire pressure sensor feeds back the tire pressure parameters, and through processing by the control program, the pressure of the lifting cylinder can be adaptively adjusted. The telescopic cylinder can adjust the front-and-rear displacement of the rear wheels, and the tension state of the front-and-rear displacement of the rear wheels can be adjusted.

[0106] During transfer or non-operation, the lifting cylinder keeps the second drive wheel set in a lifted state, and the driving force during driving is driven by the first drive wheel set to drive the vehicle, greatly improving the driving flexibility of the vehicle.

[0107] The technical solutions of some embodiments according to the present invention have been described in detail above in conjunction with the drawings. It is possible to adjust the positions of the first drive wheel set and the second drive wheel set respectively, so as to adopt different driving methods according to different construction requirements of the paver and different road surface conditions, which can effectively improve the adaptability to different road surfaces, effectively prevent slipping, and the driving flexibility and turning performance of the paver are higher. In addition, the two rows of drive wheel sets respectively adopt independent transmission mechanisms. When any one of the drive wheel sets fails, the other drive wheel set can still drive the paver to run normally, which can effectively reduce the impact on construction efficiency and construction progress.

[0108] In an embodiment according to the present invention, the terms "first", "second", "third" are only for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plural" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "coupled", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0109] In the description of the embodiments according to the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments according to the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the technical solutions of the present application.

[0110] In the description of this specification, the descriptions of the terms "an embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example according to the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only a preferred embodiment according to the present invention and is not used to limit the technical solutions of the present application. For those skilled in the art, the technical solutions of the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the technical solutions of the present application shall be included in the protection scope of the present application.

Claims

1. A rear drive system (1) of a paver, characterized in that, Comprising: A drive axle (10); A first drive wheel set (11), disposed at the rear side of the drive axle (10) and drivingly connected to the drive axle (10) through a first transmission mechanism (12); A second drive wheel set (13), disposed at the front side of the drive axle (10) and drivingly connected to the drive axle (10) through a second transmission mechanism (14); A lifting mechanism (15), one end of which is connected to the second drive wheel set (13), and the other end is used for connecting to the frame (211) of the paver (2), and the lifting mechanism (15) can drive the second drive wheel set (13) to perform a lifting motion; The first drive wheel set (11) includes two first drive wheels (111), which are respectively disposed corresponding to the two ends of the drive axle (10); The second drive wheel set (13) includes two second drive wheels (131), which are respectively disposed at the front sides of the two first drive wheels (111); Wherein, driven by the lifting mechanism (15), the second drive wheel (131) can move forward during the rising process and can move backward during the descending process; Two sliding members (152), which are respectively disposed inside the two second drive wheels (131) and can be connected to the frame (211). Each sliding member (152) is provided with a sliding groove and a slider (1521) in sliding fit, and the slider (1521) is rotationally connected to the corresponding second drive wheel (131); Two lifting cylinders (151), which are respectively disposed corresponding to the two sliding members (152). One end of each lifting cylinder (151) is connected to the slider (1521) on the same side to drive the slider (1521) and the second drive wheel (131) to move; The first drive wheel set (11) and the second drive wheel set (13) respectively have independent transmission mechanisms; When the lifting mechanism (15) works, it can drive the second drive wheel set (13) to rise or fall relative to the road surface, so as to adjust the driving mode of the paver body (21) according to different construction requirements and different road surface conditions, so that the paver body (21) forms a single-row drive wheel drive or a double-row drive wheel drive; A tire pressure detection assembly (17), including a plurality of tire pressure sensors (171), which are respectively disposed on the two second drive wheels (131) for detecting the tire pressure of the second drive wheels (131); A controller (16), the controller (16) determines the tire pressure of the second drive wheel (131) according to the detection result of the tire pressure sensor (171). When the tire pressure is less than the first tire pressure threshold, it controls the lifting mechanism (15) to drive the second drive wheel (131) to descend. When the tire pressure is greater than the second tire pressure threshold, it controls the lifting mechanism (15) to drive the second drive wheel (131) to rise. 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, it controls the lifting mechanism (15) to maintain the current state.

2. The paver rear drive system (1) according to claim 1, wherein, The first transmission mechanism (12) includes two first sprocket mechanisms (121). Each first sprocket mechanism (121) includes a first driving wheel (1211), a first driven wheel (1212), and a first transmission chain (1213). 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). The second transmission mechanism (14) includes two second sprocket mechanisms (141). Each second sprocket mechanism (141) includes a second driving wheel (1411), a second driven wheel (1412), and a second transmission chain (1413). The second driving wheel (1411) is connected to the output end of the driving axle (10), and the second driven wheel (1412) is connected to the second driving wheel (131).

3. The rear drive system (1) of a paver according to claim 2, wherein the first transmission mechanism (12) further includes a first tensioner (122), and the first tensioner (122) cooperates with the first transmission chain (1213); the first driving wheel set (11) further includes a telescopic mechanism (112). The telescopic mechanism (112) includes two telescopic oil cylinders (1121), which are respectively arranged inside the two first driving wheels (111). One end of each telescopic oil cylinder (1121) is connected to the first driving wheel (111) on the same side, and the other end is used to be connected to the frame (211); wherein, the telescopic oil cylinder (1121) is used to drive the first driving wheel (111) to move forward and backward, and adjust the tension state of the first transmission chain (1213) through the first tensioner (122).

4. The rear drive system (1) of a paver according to claim 2, wherein the second transmission mechanism (14) further includes a second tensioner (142). The second tensioner (142) is provided with a movable tensioning wheel, and the tensioning wheel cooperates with the second transmission chain (1413) to adjust the tension state of the second transmission chain (1413).

5. The paver rear drive system (1) according to claim 3, characterized in that, It further includes: a controller (16), electrically connected to the lifting mechanism (15) and the telescopic mechanism (112), and used to control the lifting mechanism (15) and the telescopic mechanism (112) to work.

6. The paver rear drive system (1) according to claim 5, characterized in that, It further includes: the controller (16) is electrically connected to the tire pressure sensor (171). When the second driving wheel set (13) and the first driving wheel set (11) work simultaneously, the controller (16) controls the lifting mechanism (15) to work according to the tire pressure of the second driving wheel (131) to drive the second driving wheel (131) to rise or fall.

7. A paver (2), characterized in that, It includes: a paver body (21), and the paver body (21) is provided with a frame (211); The rear drive system (1) of a paver as described in any one of claims 1 to 6 is provided at the rear of the paver body (21). The drive axle (10) of the rear drive system (1) of the paver is connected to the paver body (21), and one end of the lifting mechanism (15) of the rear drive system (1) of the paver, which is away from the second drive wheel set (13), extends towards the front side of the second drive wheel set (13) and is connected to the frame (211).

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