Width adjustable road roller

Abstract

The application discloses a road surface compression roller with adjustable width, which comprises a compression roller frame for being installed on a vehicle body, a middle compression roller rotatably installed on the lower side of the compression roller frame through an installation ring and internally provided with a middle counterweight, expansion compression rollers internally hollow and symmetrically installed on the two end faces of the middle compression roller and capable of being spliced and lengthened in the axial direction, expansion rods symmetrically installed on the two end shafts of the middle compression roller and capable of being spliced and lengthened in the axial direction, expansion counterweights symmetrically arranged about the middle compression roller, hollowly sleeved on the expansion rods, matched in the expansion compression rollers and capable of being stacked and lengthened in the axial direction, limiting rings located below the two sides of the compression roller frame, a synchronous device installed on the compression roller frame and used for driving the two limiting rings to synchronously approach or move away from each other and having a position locking function, and movable rings rotatably arranged on the limiting rings and used for being installed on the outer rings of the two end expansion compression rollers in a clamping mode to limit the compression rollers. The compression roller can be flexibly adjusted in working width and realizes one-time rolling in the transverse direction.

Description

TECHNICAL FIELD

[0001] The present application relates to construction equipment, in particular to a road surface roller with adjustable width. BACKGROUND

[0002] The current road surface roller adopts a fixed width form, and the width is not adjustable, so there are some inconveniences in some application occasions. For example, when laying pipelines on the road, the trench needs to be excavated first, then the pipeline is placed in the trench, then the backfilling is carried out, then the backfilling soil is compacted, and finally the asphalt is paved and compacted. Since the road surface roller adopts a fixed width form, the width of the road surface roller cannot be adjusted according to the excavation width. When the width of the road surface roller is greater than the excavation width, the original road surface will support part of the area of the road surface roller, causing a gap between part of the area of the road surface roller and the asphalt, so that the asphalt cannot be acted on, affecting the compaction effect of the asphalt. When the width of the road surface roller is less than the excavation width, multiple rolling is required, which not only delays the construction period, but also causes the local area to be compacted multiple times and the local area to be compacted only once, resulting in uneven connection. SUMMARY

[0003] The purpose of the present application is to provide a road surface roller with adjustable width, which can flexibly adjust the working width and realize one-time rolling in the transverse width.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A road surface roller with adjustable width, comprising a roller frame, a middle roller, an extension roller, an extension rod, an extension counterweight, a limiting ring, a synchronous device and a movable ring; the roller frame can be installed at the end of the vehicle body through an external structure; the middle roller is rotatably installed at the lower side of the middle part of the roller frame through a mounting ring, and an internal middle counterweight is arranged inside; the extension roller is hollow inside, and is symmetrically installed on the end faces of the two ends of the middle roller in a clamping form, and can be connected and lengthened in the axial direction in a clamping form; the extension rod is symmetrically installed on the two end shafts of the middle roller in a threaded form, and can be connected and lengthened in the axial direction in a threaded form; the extension counterweight is symmetrical about the middle roller, is sleeved on the extension rod, is matched in the extension roller, and can be stacked and lengthened in the axial direction; the limiting ring is located below the two sides of the roller frame; the synchronous device is installed on the roller frame and is used to drive the two limiting rings to approach or move away synchronously, and has a position locking function; the movable ring is rotatably arranged on the limiting ring and is used to be clamped on the outer rings of the two extension rollers to realize limiting; the outer surfaces of the mounting ring, the middle roller and the extension roller are aligned; the middle roller, the middle counterweight, the extension roller, the extension counterweight and the movable ring can rotate synchronously; the centers of gravity of the middle counterweight and the extension counterweight are offset from the shafts and are distributed on the same straight line.

[0006] Preferably, the outer circle of the intermediate pressure roller is provided with a ring groove matched with the limiting ring, the outer rings at both ends are provided with plug-in grooves for clamping, and the shaft centers at both ends are provided with threaded grooves for screwing the extension rods.

[0007] Preferably, the extension pressure roller is divided into multiple sections along the circumferential direction.

[0008] Preferably, the inner wall of the extension pressure roller is provided with protrusions along the axial direction, and the outer circle of the extension counterweight is provided with grooves matched with the protrusions along the axial direction.

[0009] Preferably, the outer end of the extension rod extends into the limiting ring through the movable ring, the extension rod is provided with an outer nut and an inner nut matched with the extension rod in a threaded manner, the outer nut is pressed against the outer side of the movable ring, and the inner nut is pressed against the inner side of the movable ring through the extension counterweight.

[0010] Preferably, the synchronous device comprises a transverse sleeve rotatably arranged in the middle of the pressure roller frame, a driving mechanism for driving the transverse sleeve to rotate, transverse telescopic rods arranged on both sides of the pressure roller frame and capable of telescoping in the transverse direction, transverse screws screw-connected to both ends of the transverse sleeve and having opposite threads, and vertical pieces for fixing the free ends of the transverse telescopic rods and the transverse screws on the same side together, and the limiting ring is arranged on the vertical pieces.

[0011] Preferably, the driving mechanism comprises a motor arranged on the pressure roller frame, a rotating shaft rotatably arranged on the pressure roller frame and driven by the motor, and a chain transmission assembly connecting the rotating shaft and the transverse sleeve.

[0012] Preferably, the transverse sleeve is provided with a limiting flange rotatably mounted on the pressure roller frame and axially limited.

[0013] Preferably, the blind area compaction device for compacting the rolling blind area comprises a transverse intermediate pressure rod arranged in front of the intermediate pressure roller, a driving piece arranged on the pressure roller frame and used for driving the intermediate pressure rod to ascend and descend, extension pressure rods symmetrically arranged at both ends of the intermediate pressure rod in a clamping manner and capable of being spliced in length in a clamping manner, and vertical telescopic rods connected to both sides of the pressure roller frame and capable of telescoping in the vertical direction, and the lower ends of the vertical telescopic rods on both sides are clamped on the extension pressure rods at both ends to realize limiting.

[0014] Preferably, the intermediate pressure rod is provided with plug-in grooves at both ends for clamping, the extension pressure rod is provided with a plug and a plug-in groove at both ends for clamping, and the telescopic rod is provided with a plug for clamping at the lower end.

[0015] The application has the following beneficial effects:

[0016] The pressure roller is installed at the end of the vehicle body through the pressure roller frame, and when the vehicle body moves, the middle pressure roller, the middle counterweight, the extension pressure roller, the extension counterweight and the movable ring can be pushed to rotate synchronously, so that the compaction effect is realized; the number and width size of the extension pressure roller put into use can be selected according to the required compaction width, so that the overall width of the middle pressure roller and the extension pressure roller meets the requirement, and the working width of the pressure roller can be flexibly adjusted, and the one-time rolling in the transverse width can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is a cross-sectional view of the width-adjustable road surface pressure roller in the embodiments of the present application.

[0019] Figure 2 is a front view of the width-adjustable road surface pressure roller in the embodiments of the present application.

[0020] Figure 3 is a perspective view of the width-adjustable road surface pressure roller in the embodiments of the present application.

[0021] Figure 4 is a perspective view of the middle pressure roller and the extension pressure roller in the embodiments of the present application.

[0022] In the figure: 1-pressure roller frame; 2-middle pressure roller; 3-extension pressure roller; 4-extension rod; 5-extension counterweight; 6-limiting ring; 7-movable ring; 8-outer connecting structure; 9-middle counterweight; 10-ring groove; 11-insertion slot; 12-threaded groove; 13-plug; 14-protrusion; 15-mounting ring; 16-outer nut; 17-inner nut; 18-transverse sleeve; 19-transverse telescopic rod; 20-transverse screw rod; 21-vertical piece; 22-motor; 23-rotating shaft; 24-chain transmission assembly; 25-limiting flange; 26-middle pressure rod; 27-driving piece; 28-extension pressure rod; 29-vertical telescopic rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] The following detailed description of embodiments of the application in the drawings provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0028] The present embodiment discloses a width-adjustable road surface compression roller, as shown in Figures 1 to 4 , comprising a compression roller frame 1, a middle compression roller 2, an expansion compression roller 3, an expansion rod 4, an expansion weight 5, a limiting ring 6, a synchronous device and a movable ring 7. Among them: the compression roller frame 1 can be installed at the end of the vehicle body through the external structure 8, see Figures 1 to 3 ; the middle compression roller 2 is rotatably mounted in the middle lower side of the compression roller frame 1 through the mounting ring 15, and the inside is provided with a middle weight 9, see Figures 1 to 3 ; the expansion compression roller 3 is hollow inside, symmetrically installed on the two end faces of the middle compression roller 2 in a clamping form, and can be spliced and lengthened in an axial direction in a clamping form, see Figures 1 to 4 ; the expansion rod 4 is symmetrically installed on the two end shafts of the middle compression roller 2 in a threaded form, and can be spliced and lengthened in an axial direction in a threaded form, see Figure 1 and Figure 2 ; the expansion weight 5 is symmetrical about the middle compression roller 2, is sleeved on the expansion rod 4, is matched in the expansion compression roller 3, and can be stacked and lengthened in an axial direction, see Figure 1 ; the limiting ring 6 is located below the two sides of the compression roller frame 1, see Figures 1 to 3 ; the synchronous device is installed on the compression roller frame 1, used to drive the two limiting rings 6 to be close or far away synchronously, and has a position locking function, see Figures 1 to 3 ; the movable ring 7 is rotatably provided on the limiting ring 6, used to be installed on the outer ring of the two end expansion compression rollers 3 in a clamping form to realize limiting, see Figures 1 to 3And there are: the outer surface of the mounting ring 15, the intermediate pressure roller 2, the extension pressure roller 3 are aligned; the intermediate pressure roller 2, the intermediate weight 9, the extension pressure roller 3, the extension weight 5, the movable ring 7 can rotate synchronously; the center of gravity of the intermediate weight 9 and the extension weight 5 deviates from the axis and the center of gravity is distributed on the same straight line. When backfilling soil and paving asphalt in the trench, the pressure roller can be used for compaction work: the pressure roller frame 1 is installed at the end of the vehicle body, the number and width size of the extension pressure roller 3 put in are selected according to the width of the trench, so that the overall width of the intermediate pressure roller 2 and the extension pressure roller 3 is the same as the width of the trench; during installation, the extension pressure roller 3 and the extension rod 4 are spliced at both ends of the intermediate pressure roller 2 first, then the extension weight 5 is installed on the extension rod 4, then the two side limiting rings 6 are driven synchronously to approach by using the synchronous device to install the movable ring 7 on the two end extension pressure rollers 3; after installation, the vehicle body moves to push the intermediate pressure roller 2, the intermediate weight 9, the extension pressure roller 3, the extension weight 5 and the movable ring 7 to rotate synchronously, and the asphalt is compacted.

[0029] The pressure roller is installed at the end of the vehicle body through the pressure roller frame 1, and the vehicle body can push the intermediate pressure roller 2, the intermediate weight 9, the extension pressure roller 3, the extension weight 5 and the movable ring 7 to rotate synchronously when moving, so as to realize the compaction effect; the number and width size of the extension pressure roller 3 put in can be selected according to the required compaction width, so that the overall width of the intermediate pressure roller 2 and the extension pressure roller 3 meets the requirements, so that the working width of the pressure roller can be flexibly adjusted, and one-time rolling in the transverse width can be realized; the extension pressure roller 3 and the extension weight 5 are symmetrically arranged, which can ensure that the vehicle body is not off-loaded and ensure the uniformity of compaction; the extension pressure roller 3 and the extension weight 5 are arranged separately instead of being integrated, so that they can be assembled separately, avoiding the problem of excessive weight of single assembly which requires additional auxiliary instruments, and the extension pressure roller 3 is hollow, so the unit width weight is smaller, and the extension pressure roller 3 is arranged wider, the unit width weight of the extension weight 5 is larger, because the extension weight 5 is arranged narrower, and the two are arranged separately, which can speed up the installation rhythm; the extension rod 4 adopts a splicing mode, which can adapt to different width adjustments, is used for installing and restraining the extension weight 5, and avoids disorderly installation of the extension weight 5; generally, the pressure roller realizes pressure enhancement by using internal vibration members, the pressure roller realizes pressure enhancement by the center of gravity deviation of the intermediate weight 9 and the extension weight 5, which is more convenient to install and expand compared with the vibration members.

[0030] As shown in Figures 1 to 3 In the present embodiment, the external structure 8 is a flange, which is located at the upper part of the pressure roller frame 1, and the pressure roller frame 1 can be installed at the front end of the vehicle body through the flange.

[0031] As shown in Figure 1 and Figure 4As shown in the figure, in this embodiment, the outer circle of the intermediate pressure roller 2 is provided with a ring groove 10 cooperating with the limiting ring 6, the outer ring at both ends is provided with a plug-in groove 11 for clamping, and the shaft center at both ends is provided with a threaded groove 12 for screwing the extension rod 4. The end face of the extension pressure roller 3 at both ends is respectively provided with a plug 13 and a plug-in groove 11 for clamping, and the movable ring 7 is provided with a plug 13 for clamping. The clamping is convenient, and after clamping, it can rotate synchronously.

[0032] As shown in the figure, Figure 4 In this embodiment, when the whole extension pressure roller 3 is too large or too heavy to be installed, the extension pressure roller 3 can be divided into multiple segments along the ring direction, which is convenient for installation.

[0033] As shown in the figure, Figure 1 and Figure 4 In this embodiment, the inner wall of the extension pressure roller 3 is provided with a protrusion 14 along the axial length, and the outer circle of the extension counterweight 5 is provided with a groove for cooperating with the protrusion 14 along the axial length. The first setting can make the intermediate counterweight 9 rotate with the extension pressure roller 3, and the second setting can position the extension counterweight 5 so that its center of gravity is on a line.

[0034] As shown in the figure, Figure 1 and Figure 3 In this embodiment, the outer end of the extension rod 4 extends into the limiting ring 6 through the movable ring 7, and the extension rod 4 is provided with an outer nut 16 and an inner nut 17 which are threadedly matched. The outer nut 16 presses the outer side of the movable ring 7, and the inner nut 17 presses the inner side of the movable ring 7 through the extension counterweight 5. This setting can axially limit the extension counterweight 5. After the extension pressure roller 3 and the extension rod 4 are installed, the position of the inner nut 17 is adjusted first, then the extension counterweight 5 is put on the extension rod 4 in sequence, then the movable ring 7 is installed on the extension pressure roller 3 at both ends by driving the two limiting rings 6 to move close to each other through the synchronous device, and the inner side of the movable ring 7 is abutted against the extension counterweight 5, and then the outer nut 16 is installed, so that the outer nut 16 is pressed against the outer side of the movable ring 7, further strengthening the limiting effect.

[0035] As shown in the figure, Figures 1 to 3 In this embodiment, the synchronous device includes a transverse sleeve 18 rotatably arranged in the middle of the pressure roller frame 1, a driving mechanism for driving the transverse sleeve 18 to rotate, transverse telescopic rods 19 arranged on both sides of the pressure roller frame 1 and capable of following the transverse telescopic rods 19, transverse screws 20 threadedly matched at both ends of the transverse sleeve 18 and having opposite threads, and vertical pieces 21 fixing the free ends of the transverse telescopic rods 19 and the transverse screws 20 on the same side together. The limiting ring 6 is arranged on the vertical piece 21. Since the free ends of the transverse telescopic rods 19 and the transverse screws 20 are fixed, the transverse telescopic rods 19 have a transverse guiding effect on the transverse screws 20. Therefore, when the driving mechanism drives the transverse sleeve 18 to rotate, the transverse sleeve 18 will drive the transverse screws 20 on both sides to extend or retract synchronously, thereby driving the limiting rings 6 on both sides to move close to or away from each other synchronously.

[0036] AsFigure 1 As shown, in this embodiment, the driving mechanism includes a motor 22 arranged on the pressure roller frame 1, a rotating shaft 23 rotatably arranged on the pressure roller frame 1 and driven by the motor 22, and a chain transmission assembly 24 connecting the rotating shaft 23 and the transverse sleeve 18. The torque output by the motor 22 is transmitted to the transverse sleeve 18 through the rotating shaft 23 and the chain transmission assembly 24, and a reducer can also be added to increase the torque.

[0037] like Figure 1 As shown, in this embodiment, a limiting flange 25 is provided on the transverse sleeve 18. The limiting flange 25 is rotatably mounted on the pressure roller frame 1 and is axially limited to prevent the transverse sleeve 18 from moving laterally.

[0038] like Figures 1 to 3 As shown, this embodiment also includes a blind spot compaction device for compacting rolling blind spots. The blind spot compaction device includes an intermediate pressure rod 26 located transversely in front of the intermediate pressure roller 2, a drive member 27 (which can be an electric push rod or a hydraulic push rod) mounted on the pressure roller frame 1 and used to drive the intermediate pressure rod 26 up and down, extension pressure rods 28 symmetrically mounted at both ends of the intermediate pressure rod 26 in a snap-fit ​​manner and capable of being spliced ​​and extended in a snap-fit ​​manner, and vertical telescopic rods 29 connected to both sides of the pressure roller frame 1 and capable of vertical expansion and contraction with the movement. The lower ends of the vertical telescopic rods 29 on both sides snap onto the extension pressure rods 28 at both ends to achieve position limiting. The vertical telescopic rods 29 can be mounted on the vertical member 21. At the end of the pressure roller's operation, it may encounter curbs or other obstacles, thus forming a rolling blind spot. The device can use the drive member 27 to drive the intermediate pressure rod 26 and the extension pressure rod 28 to compact the rolling blind spot in front of the intermediate pressure roller 2. The extension pressure rod 28 is used to expand to form a suitable working width to prevent the asphalt from warping and damaging it later.

[0039] like Figure 2 and Figure 3 As shown, in this embodiment, both ends of the middle pressure rod 26 are provided with slots 11 for engagement, both ends of the extension pressure rod 28 are respectively provided with plugs 13 and slots 11 for engagement, and the lower end of the telescopic rod is provided with a plug 13 for engagement, which is convenient for engagement.

[0040] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A width-adjustable road surface roller, characterized in that The utility model relates to a kind of blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

2. The width adjustable road roller as claimed in claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

3. The width adjustable road roller as claimed in claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

4. The width adjustable road roller as claimed in claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

5. The width adjustable road roller as claimed in claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

6. The width adjustable road roller of claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

7. The width adjustable road roller of claim 1, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece.

8. The width adjustable road roller as claimed in claim 7, wherein: The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telescopic rod and drive piece. The utility model discloses a blind area compaction device for compaction rolling blind area, which comprises intermediate pressure rod, extension pressure rod, vertical telesc

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