Adjustable land compacting device
By designing an adjustable counterweight component and an outer cylinder sliding fit in the land compaction device, the applicability problem of land with different moisture levels is solved, and flexible adjustment of pressure and area is achieved, ensuring compaction effect and device stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA SAISHANGJIANGNAN AGRI TECH
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-12
AI Technical Summary
Existing land compaction devices cannot adjust pressure and compaction area according to soil moisture, thus limiting their applicability.
An adjustable land compaction device was designed. The pressure applied to the land is adjusted by changing the distance between the counterweight component and the rear roller component. The area of the compacted surface is changed by the sliding cooperation between the outer cylinder and the inner cylinder, so as to adapt to land with different moisture levels.
It can adjust the pressure and compaction area under different humidity conditions, prevent the device from sinking into the soil, ensure the compaction effect, and has a wide range of applications.
Smart Images
Figure CN224218825U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compaction equipment technology, specifically to an adjustable land compaction device. Background Technology
[0002] When cultivating seedlings, the land needs to be leveled and compacted first, and then a ground cover should be laid. Land compaction is generally done using a land compaction device. The pressure applied to the land varies depending on the soil moisture level. When the soil moisture is high, a lower compaction pressure is needed to prevent the device from sinking into the soil and to ensure its smooth operation. When the soil moisture is low, a higher compaction pressure is needed to ensure sufficient compaction and leveling of the land. Currently, the pressure applied to the land by existing land compaction devices is fixed. Different pressure-generating devices are required for different soil moisture levels, thus limiting the applicability of existing land compaction devices. Summary of the Invention
[0003] In view of this, it is necessary to provide an adjustable land compaction device that can adjust the pressure and compaction area according to the soil moisture.
[0004] An adjustable land compaction device includes a main frame, a rear roller assembly, and a counterweight assembly. The counterweight assembly is movably mounted on the main frame and can be driven to change the distance between itself and the rear roller assembly. The rear roller assembly includes an inner cylinder and an outer cylinder sleeved outside the inner cylinder. The two are coaxial and slidably fitted. The outer surface of the outer cylinder and the outer surface of the inner cylinder exposed outside the outer cylinder form a rear compaction surface. The outer cylinder slides relative to the inner cylinder to change the area of the rear compaction surface.
[0005] Preferably, the counterweight assembly includes a connector movably mounted on the rear frame and a counterweight block fixed to the connector, the connector being drivable to move on the rear frame.
[0006] Preferably, a first rack is formed on the rear frame extending from the rear pressure roller assembly in a direction away from the rear pressure roller assembly. The counterweight assembly also includes a first gear meshing with the first rack and a first drive unit connected to the first gear. The first gear is rotatably connected to the connector and can rotate under the drive of the first drive unit to drive the connector to move along the first rack.
[0007] Preferably, the rear frame includes a horizontal bar, and the first rack and counterweight assembly are both formed on the horizontal bar.
[0008] Preferably, the outer cylinder includes a first outer cylinder and a second outer cylinder respectively sleeved on both ends of the inner cylinder, the three are coaxial, and the first outer cylinder and the inner cylinder and the second outer cylinder and the inner cylinder are in sliding fit.
[0009] Preferably, the end of the second outer cylinder facing the second outer cylinder has an inclined annular first chamfer surface, and the end of the second outer cylinder facing the second outer cylinder has an inclined annular second chamfer surface.
[0010] Preferably, the rear pressure roller assembly further includes a connecting rod, a first sleeve and a second sleeve slidably sleeved on the connecting rod, a first connecting rod fixedly connected to the first sleeve, and a second connecting rod fixedly connected to the second sleeve. The connecting rod is connected to the rear frame, the first connecting rod is rotatably connected to the first outer cylinder, and the second connecting rod is rotatably connected to the second outer cylinder. The first sleeve and the second sleeve can be driven to move towards or away from each other along the extension direction of the connecting rod to change the area of the rear compacted surface.
[0011] Preferably, the rear pressure roller assembly further includes a second rack connected to the first sleeve, a third rack connected to the second sleeve, a second gear meshing with the second rack and the third rack, and a second drive unit driving the second gear. The second rack and the third rack are arranged opposite to each other, and can move towards or away from each other under the drive of the second gear.
[0012] Preferably, the rear pressure roller assembly further includes a fixed block connected to the connecting rod. A groove is formed inside the fixed block. The second gear is rotatably connected to the fixed block and located in the groove. The second rack and the third rack pass through the groove and are slidably connected to the fixed block. The sliding direction of the second rack relative to the fixed block is the same as the sliding direction of the first outer cylinder relative to the inner cylinder, and the second rack slides synchronously with the first outer cylinder. The sliding direction of the third rack relative to the fixed block is the same as the sliding direction of the second outer cylinder relative to the inner cylinder, and the third rack slides synchronously with the second outer cylinder.
[0013] Preferably, the adjustable land compaction device further includes a first cleaning component and a second cleaning component. The first cleaning component has a first cleaning side that adheres to the outer surface of the first outer cylinder to clean the soil adhering to the outer surface of the first outer cylinder, and the second cleaning component has a second cleaning side that adheres to the outer surface of the second outer cylinder to clean the soil adhering to the outer surface of the second outer cylinder.
[0014] The present invention adopts the above-mentioned technical solution, and its beneficial effects are as follows: When the soil moisture varies, the pressure applied to the soil by the rear compaction roller assembly can be changed by the counterweight assembly. The farther the counterweight assembly is from the rear compaction roller assembly, the smaller the pressure applied to the soil by the rear compaction roller assembly; conversely, the closer the counterweight assembly is to the rear compaction roller assembly, the greater the pressure applied to the soil by the rear compaction roller assembly. Therefore, when the soil moisture is high, the counterweight assembly moves away from the rear compaction roller assembly, reducing the pressure applied to the soil by the rear compaction assembly and preventing the rear compaction assembly from sinking into the soil. At the same time, the outer cylinder can slide relative to the inner cylinder, increasing the area of the rear compaction surface and reducing the pressure, thus achieving a balance of forces at the front and rear of the entire device and preventing excessive pressure at the front. When the soil moisture is low, the counterweight assembly moves closer to the rear compaction roller assembly, increasing the pressure applied to the soil by the rear compaction surface. At the same time, the outer cylinder can slide relative to the inner cylinder, reducing the area of the rear compaction surface, thereby increasing both the pressure and intensity applied to the soil by the rear compaction assembly, meeting the compaction requirements. This utility model's adjustable land compaction device can adapt to land with different moisture levels and has a wide range of applications. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the adjustable land compaction device of this utility model.
[0016] Figure 2 for Figure 1 A structural diagram from another perspective.
[0017] Figure 3 for Figure 1 A schematic diagram of the structure of the rear frame, counterweight assembly, rear pressure roller assembly, first cleaning assembly, second cleaning assembly and pedal of the adjustable soil compaction device.
[0018] Figure 4 for Figure 1 A schematic diagram of the rear frame and counterweight components of the adjustable soil compaction device.
[0019] Figure 5 for Figure 1 A schematic diagram of the counterweight assembly of the adjustable soil compaction device, excluding the first rack and the limiting plate.
[0020] Figure 6 for Figure 1 A schematic diagram of the structure of the rear roller assembly, the first cleaning assembly, the second cleaning assembly, and the pedal of the adjustable soil compaction device.
[0021] Figure 7 for Figure 6 A magnified view of part A in the image.
[0022] Figure 8 for Figure 6A schematic diagram of the structure after the inner cylinder, outer cylinder, support frame, and vibrator have been removed.
[0023] Figure 9 for Figure 8 A magnified view of part B in the image.
[0024] Figure 10 for Figure 6 A schematic diagram of the structure of the second rack, third rack, second gear, and second driver of the middle and rear pressure roller assembly.
[0025] Figure 11 for Figure 6 A schematic diagram of the inner and outer cylinders of the middle and rear pressure roller assembly.
[0026] Figure 12 for Figure 6 A schematic diagram of the inner cylinder, support frame, and vibrator of the middle and rear pressure roller assembly.
[0027] Figure 13 For the image Figure 1 A schematic diagram of the front roller assembly of the adjustable soil compaction device.
[0028] In the diagram: Main frame 10, front frame 11, rear frame 12, horizontal bar 121, diagonal bar 122, counterweight assembly 20, connector 21, counterweight block 22, first rack 23, first gear 24, first drive unit 25, limiting plate 26, rear pressure roller assembly 30, inner cylinder 31, outer cylinder 32, first outer cylinder 321, first chamfered surface 3211, second outer cylinder 322, second chamfered surface 3221, connecting rod 33, first sleeve 34, second sleeve 35, first connecting rod 36, second connecting rod 37, second rack 38, third rack 39, second gear 310, second drive unit 311, fixing block 312, support frame 313, vibrator 314, first cleaning assembly 40, first connecting plate 41. First adjusting hole 411, first elastic element 42, first scraper 43, first fixing plate 431, first flexible plate 432, first arc-shaped rod 44, first extension rod 45, second extension rod 46, first nut 47, second cleaning and scraping assembly 50, second connecting plate 51, second adjusting hole 511, second elastic element 52, second scraper 53, second fixing plate 531, second flexible plate 532, second arc-shaped rod 54, third extension rod 55, fourth extension rod 56, second nut 57, driver's seat 60, steering assembly 70, connecting arm 71, operating handle 72, pedal 80, driver 90, front pressure roller assembly 100, first pressure roller 101, second pressure roller 102, reinforcing plate 103. Detailed Implementation
[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Please refer to Figures 1 to 13 This utility model provides an adjustable land compaction device, including a main frame 10, a rear compaction roller assembly 30, and a counterweight assembly 20. The counterweight assembly 20 is movably mounted on the main frame 10 and can be driven to change the distance between it and the rear compaction roller assembly 30. The rear compaction roller assembly 30 includes an inner cylinder 31 and an outer cylinder 32 sleeved outside the inner cylinder 31. The two are coaxial and slidably fitted. The outer surface of the outer cylinder 32 and the outer surface of the inner cylinder 31 exposed outside the outer cylinder 32 form the rear compaction surface. The outer cylinder 32 slides relative to the inner cylinder 31 to change the area of the rear compaction surface.
[0031] For soils with varying moisture levels, moving the counterweight assembly 20 changes the distance between the counterweight assembly 20 and the rear pressure roller assembly 30, thereby altering the pressure exerted by the rear pressure roller assembly 30 on the soil. Specifically, the greater the distance between the counterweight assembly 20 and the rear pressure roller assembly 30, the smaller the pressure exerted by the rear pressure roller assembly 30 on the soil; conversely, the closer the distance between the counterweight assembly 20 and the rear pressure roller assembly 30, the greater the pressure exerted by the rear pressure roller assembly 30 on the soil. Therefore, when the soil moisture is high, the counterweight assembly 20 moves away from the rear compaction roller assembly 30, reducing the pressure applied to the soil by the rear compaction assembly and preventing it from sinking into the soil. Simultaneously, the outer cylinder 32 can slide relative to the inner cylinder 31, increasing the area of the rear compaction surface and achieving force balance between the front and rear of the entire device, preventing excessive pressure at the front. When the soil moisture is low, the counterweight assembly 20 moves closer to the rear compaction roller assembly 30, increasing the pressure applied to the soil by the rear compaction surface. Simultaneously, the outer cylinder 32 can slide relative to the inner cylinder 31, reducing the area of the rear compaction surface. This results in increased pressure and intensity applied to the soil by the rear compaction assembly, meeting the compaction requirements. The movement of the counterweight assembly 20, combined with the change in the rear compaction surface area of the rear compaction roller assembly 30, allows for different pressures and compaction areas for soils with varying moisture levels. In other words, the adjustable soil compaction device can adapt to soils with different moisture levels and has a wide range of applications.
[0032] The outer cylinder 32 is hollow inside and is used to accommodate the inner cylinder 31. The inner diameter of the outer cylinder 32 is larger than the outer diameter of the inner cylinder 31, and the difference between the two is small to prevent soil from entering the gap between the outer cylinder 32 and the inner cylinder 31.
[0033] Please refer to Figures 3 to 5Furthermore, the counterweight assembly 20 includes a connector 21 movably disposed on the rear frame 12 and a counterweight block 22 fixed on the connector 21, the connector 21 being drivable to move on the rear frame 12.
[0034] The connector 21 is used to fix the counterweight 22 and move the counterweight 22 on the rear frame 12. The counterweight 22 is detachably connected to the connector 21, allowing selection of a suitable weight of counterweight 22 according to actual needs, thereby changing the pressure applied to the ground by the rear pressure roller assembly 30. Figure 5 As shown, the counterweight 22 is connected to the connector 21 by two "U"-shaped rods. The ends of the "U"-shaped rods are threaded and inserted into the connector 21 and fixed to the connector 21 by nuts. Of course, the counterweight 22 can also be detachably connected to the connector 21 in other ways.
[0035] Please continue reading. Figures 3 to 5 Furthermore, a first rack 23 is formed on the rear frame 12 extending from the rear pressure roller assembly 30 in a direction away from the rear pressure roller assembly 30. The counterweight assembly 20 also includes a first gear 24 meshing with the first rack 23 and a first drive part 25 connected to the first gear 24. The first gear 24 is rotatably connected to the connector 21, and the first gear 24 can rotate under the drive of the first drive part 25 to drive the connector 21 to move along the first rack 23.
[0036] The rear frame 12 is fixed, and the first gear 24 rotates. Through the meshing relationship between the first gear 24 and the first rack 23, the connecting piece 21 can move along the extension direction of the first rack 23, thereby driving the counterweight 22 to move.
[0037] The first rack 23 consists of teeth formed on the rear frame 12, forming an integral structure with the rear frame 12. Alternatively, the first rack 23 can be separate from the rear frame 12 and fixed to it. Two limiting plates 26 are formed on the rear frame 12, located at both ends of the first rack 23. The limiting plates 26 limit the movement range of the first gear 24. When the first gear 24 rotates to contact the limiting plates 26, it cannot continue moving due to the obstruction of the limiting plates 26, thus preventing the first gear 24 from disengaging from the first rack 23. The first drive unit 25 can be as follows: Figure 5 The manual rotary wheel shown can also be a motor.
[0038] Please refer to Figure 3 and Figure 4 Furthermore, the rear frame 12 includes a horizontal bar 121, on which the first rack 23 and the counterweight assembly 20 are both formed.
[0039] The horizontal bar 121 is set horizontally, and the first rack 23 is formed on the horizontal upper surface of the horizontal bar 121, so that the first gear 24 can move on the horizontal surface and the movement is more stable.
[0040] In addition, the main frame 10 also includes a front frame 11, and the rear frame 12 also includes a diagonal bar 122 rotatably connected to the front frame 11. The diagonal bar 122 is integrated with the horizontal bar 121 and the two form an angle. The diagonal bar 122 is inclined downward from the horizontal bar 121 towards the front frame 11 to facilitate connection with the front frame 11. The axis of rotation between the diagonal bar 122 and the front frame 11 is in the vertical direction, so that the rear frame 12 can swing horizontally relative to the front frame 11, so that the rear frame 12 can be turned by the turning of the front frame 11.
[0041] Please refer to Figure 3 , Figure 6 and Figure 11 Furthermore, the outer cylinder 32 includes a first outer cylinder 321 and a second outer cylinder 322 respectively sleeved at both ends of the inner cylinder 31. The three are coaxial, and the first outer cylinder 321 and the inner cylinder 31, as well as the second outer cylinder 322 and the inner cylinder 31, are in sliding fit.
[0042] When the area of the rear compacted surface needs to be increased, the first outer cylinder 321 slides away from the second outer cylinder 322 relative to the inner cylinder 31, and the second outer cylinder 322 slides away from the first outer cylinder 321 relative to the inner cylinder 31. When the area of the rear compacted surface needs to be decreased, the first outer cylinder 321 slides closer to the second outer cylinder 322 relative to the inner cylinder 31, and the second outer cylinder 322 slides closer to the first outer cylinder 321 relative to the inner cylinder 31. The arrangement of the first outer cylinder 321 and the second outer cylinder 322 allows for a wider range of adjustment of the rear compacted surface area and avoids uneven force distribution on the rear pressure roller assembly 30 caused by a single outer cylinder 32. Furthermore, the first outer cylinder 321 and the second outer cylinder 322 move synchronously, and the distance between them and the centerline of the inner cylinder 31 is the same, ensuring the balance of the rear pressure roller assembly 30 during its movement.
[0043] Please refer to Figure 11 Furthermore, the end of the first outer cylinder 321 facing the second outer cylinder 322 has an inclined annular first chamfered surface 3211, and the end of the second outer cylinder 322 facing the first outer cylinder 321 has an inclined annular second chamfered surface 3221.
[0044] Through the above-described configuration, the soil compacted by the inner cylinder 31 forms a trapezoidal shape rather than a rectangle. This prevents abrupt rectangular protrusions from appearing on the compacted soil, and the area of the trapezoidal protrusions is smaller than that of the rectangular protrusions, reducing the impact on the overall compaction of the soil. The thickness of the first outer cylinder 321 and the second outer cylinder 322 is relatively small, resulting in a lower height for the trapezoidal protrusions formed on the post-compacted surface. This height is designed to eliminate the need for cleaning the trapezoidal protrusions.
[0045] Please refer to Figure 3 , Figure 6 , Figure 8 and Figure 10 Furthermore, the rear pressure roller assembly 30 also includes a connecting rod 33, a first sleeve 34 and a second sleeve 35 slidably sleeved on the connecting rod 33, a first connecting rod 36 fixedly connected to the first sleeve 34, and a second connecting rod 37 fixedly connected to the second sleeve 35. The connecting rod 33 is connected to the rear frame 12, the first connecting rod 36 is rotatably connected to the first outer cylinder 321, and the second connecting rod 37 is rotatably connected to the second outer cylinder 322. The first sleeve 34 and the second sleeve 35 can be driven to move towards or away from each other along the extension direction of the connecting rod 33 to change the area of the rear compacted surface.
[0046] The connecting rod 33 is horizontally positioned below the rear frame 12. The first sleeve 34 and the second sleeve 35 are located at opposite ends of the connecting rod 33. The connecting rod 33 is fixed relative to the rear frame 12. The first sleeve 34 and the second sleeve 35 slide along the connecting rod 33, causing the first connecting rod 36 and the second connecting rod 37 to move, thereby causing the first outer cylinder 321 and the second outer cylinder 322 to move. Figure 8 As shown, the first connecting rod 36 is an "L"-shaped rod, with its vertical section fixedly connected to the first outer cylinder 321, and its horizontal section extending into the interior of the first outer cylinder 321, as shown. Figure 9 As shown, the support frame 313 inside the inner cylinder 31 is formed into a sleeve at the middle position. The horizontal section of the first connecting rod 36 passes through the sleeve and slides with it. When the first connecting rod 36 moves the first outer cylinder 321, the horizontal section of the first connecting rod 36 slides in the sleeve of the support frame 313. Similarly, the second connecting rod 37 is also an "L"-shaped rod. Its vertical section is fixedly connected to the second outer cylinder 322, and its horizontal section passes through the interior of the second outer cylinder 322 and into the sleeve of the support frame 313, and slides with it. When the second connecting rod 37 moves the second outer cylinder 322, the horizontal section of the second connecting rod 37 slides in the sleeve of the support frame 313, ensuring that the movement of the first outer cylinder 321 and the second outer cylinder 322 can be smoothly achieved by the first connecting rod 36 and the second connecting rod 37, which drive the first outer cylinder 321 and the second outer cylinder 322 to move relative to the inner cylinder 31. A pedal 80 is fixed to the vertical section of the first link 36 and the vertical section of the second link 37, respectively.
[0047] In addition, such as Figure 12 As shown, the inner cylinder 31 is hollow inside and is supported by a support frame 313. The support frame 313 includes a sleeve coaxial with the inner cylinder 31 and support rods radially arranged along the circumference of the sleeve to ensure that the inner cylinder 31 has sufficient supporting force.
[0048] Please refer to Figure 6 , Figure 8 and Figure 10Furthermore, the rear pressure roller assembly 30 also includes a second rack 38 connected to the first sleeve 34, a third rack 39 connected to the second sleeve 35, a second gear 310 meshing with the second rack 38 and the third rack 39, and a second drive unit 311 driving the second gear 310. The second rack 38 and the third rack 39 are arranged opposite to each other, and can move towards or away from each other under the drive of the second gear 310.
[0049] The teeth of the second rack 38 and the third rack 39 extend vertically, and the axis of the second gear 310 is vertical. When the second gear 310 rotates, the second rack 38 and the third rack 39 move synchronously towards or away from each other. With only one second gear 310, the two racks, the second rack 38 and the third rack 39, can be driven to move simultaneously. The drive structure is simpler and the drive method is more convenient.
[0050] The second drive unit 311 can be as follows: Figure 10 The manual rotary wheel shown can also be a motor.
[0051] Please refer to Figure 6 and Figure 8 Furthermore, the rear pressure roller assembly 30 also includes a fixing block 312 connected to the connecting rod 33. A sliding groove is formed inside the fixing block 312. The second gear 310 is rotatably connected to the fixing block 312 and located in the sliding groove. The second rack 38 and the third rack 39 pass through the sliding groove and are slidably connected to the fixing block 312. The sliding direction of the second rack 38 relative to the fixing block 312 is the same as the sliding direction of the first outer cylinder 321 relative to the inner cylinder 31, and the second rack 38 slides synchronously with the first outer cylinder 321. The sliding direction of the third rack 39 relative to the fixing block 312 is the same as the sliding direction of the second outer cylinder 322 relative to the inner cylinder 31, and the third rack 39 slides synchronously with the second outer cylinder 322.
[0052] The fixing block 312 is fixed to the rear frame 12 to connect the rear pressure roller assembly 30 to the rear frame 12, increasing the stability of both. The fixing block 312 is a hollow cube with open sides on opposite sides in the extension direction of the connecting rod 33 and closed sides on the other side. The center of the second gear 310 is fixed to the bottom end of a vertical rod located below the rear frame 12. The vertical rod passes vertically through the rear frame 12 and is rotatably connected to it. The second drive unit 311 is fixed to the top of the vertical rod and located above the rear frame 12 for easy operation by the operator.
[0053] Please refer to Figure 3 , Figures 6 to 9Furthermore, the adjustable land compaction device also includes a first cleaning component 40 and a second cleaning component 50. The first cleaning component 40 has a first cleaning side that adheres to the outer surface of the first outer cylinder 321 to clean the soil adhering to the outer surface of the first outer cylinder 321. The second cleaning component 50 has a second cleaning side that adheres to the outer surface of the second outer cylinder 322 to clean the soil adhering to the outer surface of the second outer cylinder 322.
[0054] When the soil in the land has high viscosity, the soil will stick to the rear compaction surface of the rear roller assembly 30. Therefore, a first cleaning assembly 40 and a second cleaning assembly 50 are set up to clean the soil attached to the outer surface of the first outer cylinder 321 and the outer surface of the second outer cylinder 322 respectively, so as to ensure the smoothness of the rear compaction surface and thus ensure the best compaction effect.
[0055] The first cleaning and scraping assembly 40 includes a first connecting plate 41 connected to the first connecting rod 36, a first arc-shaped rod 44 connected to the first outer cylinder 321, a first scraper 43 connected to the first connecting plate 41 and the first arc-shaped rod 44, and a first elastic member 42 connected to the first connecting plate 41 and the first scraper 43. The arc of the first arc-shaped rod 44 is the same as the arc of the first outer cylinder 321, so as to connect the first scraper 43 to the first outer cylinder 321, while avoiding hindering the rotation of the first outer cylinder 321. An arc-shaped first adjustment hole 411 is formed on the first connecting plate 41. The first adjustment hole 411 is formed as follows: Figure 7 The diagram shows a concave arc shape from the upper left to the lower right. A tangent is formed to the contact line between the first scraper 43 and the first outer cylinder 321, creating a cross-section of the first outer cylinder 321. The first surface of the first scraper 43 forms an acute angle with this cross-section, and the second surface forms an obtuse angle. The second surface of the first scraper 43 is used to scrape the soil from the outer surface of the first outer cylinder 321, allowing the soil to slide down along it. Since a triangular area is formed between the first surface of the first scraper 43 and the outer surface of the first outer cylinder 321, the first surface of the first scraper 43 cannot be used for scraping to prevent soil accumulation within this area. As the first outer cylinder 321 moves, the first arc-shaped rod 44 drives the entire first scraping assembly 40 to move synchronously with the first outer cylinder 321, ensuring that the first scraping assembly 40 can always scrape the soil from the outer surface of the first outer cylinder 321, regardless of its position.
[0056] The first scraper 43 includes a first fixed plate 431 connected to the first connecting plate 41 and a first flexible plate 432 fixed to the first fixed plate 431 by bolts and nuts. The first flexible plate 432 can be made of silicone, so that the first scraper 43 forms a soft contact with the first outer cylinder 321, reducing wear on the first outer cylinder 321 and keeping the outer surface of the first outer cylinder 321 flat. This ensures that the rear compaction surface of the rear pressure roller assembly 30 is always flat, thus guaranteeing the best compaction effect. The first flexible plate 432 forms a first cleaning side that fits against the outer surface of the first outer cylinder 321 on the side opposite to the first fixed plate 431. The first fixed plate 431 has a first extension rod 45 that extends horizontally to the side facing the first connecting plate 41 and passes through the first adjustment hole 411. The first connecting plate 41 has a second extension rod 46 that extends parallel to the first extension rod 45 on the side opposite to the first scraper 43. The first elastic member 42 can be a spring. One end of the first elastic member 42 is attached to the first extension rod 45 that passes through the first adjustment hole 411, and the other end is attached to the second extension rod 46. The first elastic element 42, whether extended or shortened, can drive the first extension rod 45 to move along the first adjustment hole 411, so that one side of the first scraper 43 can always be in contact with the outer surface of the second outer cylinder 322. Furthermore, when one side of the first scraper 43 is worn and shortened, the first elastic element 42 can change the position of the first extension rod 45 relative to the first adjustment hole 411 through its own elastic force, so that the shortened first scraper 43 can still be in contact with the outer surface of the second outer cylinder 322. The first extension rod 45 is formed in the lower part of the first scraper 43, and a rotating shaft extends from the upper part of the first scraper 43, which is rotatably connected to the first connecting plate 41.
[0057] In some embodiments, the first extension rod 45 may be a threaded rod on which a first nut 47 may be screwed, thereby locking the first extension rod 45 onto the first connecting plate 41. Furthermore, the first nut 47 may lock the first extension rod 45 at different positions relative to the first adjusting hole 411, thereby changing the pressure applied by the first scraper 43 to the first outer cylinder 321.
[0058] The second cleaning assembly 50 includes a second connecting plate 51 connected to the second connecting rod 37, a second arc-shaped rod 54 connected to the second outer cylinder 322, a second scraper 53 connected to the second connecting plate 51 and the second arc-shaped rod 54, and a second elastic member 52 connected to the second connecting plate 51 and the second scraper 53. The arc of the second arc-shaped rod 54 is the same as the arc of the second outer cylinder 322 to connect the second scraper 53 to the second outer cylinder 322 while avoiding hindering the rotation of the second outer cylinder 322. An arc-shaped second adjustment hole 511 is formed on the second connecting plate 51. The second adjustment hole 511 is formed as follows: Figure 9The concave arc shape extends from the upper right to the lower left in the indicated orientation. A tangent is formed to the contact line between the second scraper 53 and the second outer cylinder 322, creating a tangential surface of the second outer cylinder 322. The first surface of the second scraper 53 forms an acute angle with this tangential surface, and the second surface forms an obtuse angle. The second surface of the second scraper 53 is used to scrape the soil from the outer surface of the second outer cylinder 322, allowing the soil to slide off along it. Since a triangular area is formed between the first surface of the second scraper 53 and the outer surface of the second outer cylinder 322, the first surface of the second scraper 53 cannot be used for scraping to prevent soil accumulation within this triangular area. As the second outer cylinder 322 moves, the second arc-shaped rod 54 drives the entire second scraping assembly 50 to move synchronously with the second outer cylinder 322, ensuring that the second scraping assembly 50 can always scrape the soil from the outer surface of the second outer cylinder 322, regardless of its position.
[0059] The second scraper 53 includes a second fixed plate 531 connected to the second connecting plate 51 and a second flexible plate 532 fixed to the second fixed plate 531 by bolts and nuts. The second flexible plate 532 can be made of silicone, so that the second scraper 53 forms a soft contact with the second outer cylinder 322, reducing wear on the second outer cylinder 322 and keeping the outer surface of the second outer cylinder 322 flat. This ensures that the rear compaction surface of the rear pressure roller assembly 30 is always flat, thus guaranteeing the best compaction effect. The second flexible plate 532 forms a second cleaning side that adheres to the outer surface of the second outer cylinder 322 on the side opposite to the second fixed plate 531. A third extension rod 55 extends horizontally on the side of the second fixed plate 531 opposite to the second connecting plate 51 and passes through the second adjustment hole 511. A fourth extension rod 56 extends parallel to the third extension rod 55 on the side of the second connecting plate 51 opposite to the second scraper 53. The second elastic member 52 can be a spring. One end of the second elastic member 52 is attached to the third extension rod 55 passing through the second adjustment hole 511, and the other end is attached to the fourth extension rod 56. The extension or shortening of the second elastic element 52 can drive the third extension rod 55 to move along the second adjustment hole 511, so that one side of the second scraper 53 can always be in contact with the outer surface of the second outer cylinder 322. Furthermore, when one side of the second scraper 53 is worn and shortened, the second elastic element 52 can change the position of the third extension rod 55 relative to the second adjustment hole 511 through its own elastic force, so that the shortened second scraper 53 can still be in contact with the outer surface of the second outer cylinder 322. The third extension rod 55 is formed in the lower part of the second scraper 53, and a rotating shaft extends from the upper part of the second scraper 53, which is rotatably connected to the second connecting plate 51.
[0060] In some embodiments, the third extension rod 55 may be a threaded rod on which a second nut 57 may be screwed, thereby locking the third extension rod 55 onto the second connecting plate 51. Furthermore, the second nut 57 may lock the third extension rod 55 at different positions relative to the second adjusting hole 511, thereby changing the pressure applied by the second scraper 53 to the second outer cylinder 322.
[0061] Please refer to Figure 12 Furthermore, the rear pressure roller assembly 30 also includes a vibrator 314 disposed inside the inner cylinder 31, the vibrator 314 being fixed to the inner wall of the inner cylinder 31.
[0062] When vibrator 314 is activated, it causes the inner cylinder 31 to vibrate, simultaneously causing the first outer cylinder 321 and the second outer cylinder 322 to vibrate. This dislodges the soil adhering to the inner and outer cylinders 31 and 32, working in conjunction with the first and second cleaning components 40 and 50 to clean the soil from the first and second outer cylinders 321 and 322, achieving optimal cleaning results. It should be noted that the volume and material of the inner and outer cylinders 31 and 32 ensure sufficient mass to generate adequate pressure for compacting the ground, preventing ineffective compaction due to their hollow interior.
[0063] Please refer to Figure 1 , Figure 2 and Figure 13 The front pressure roller assembly 100 includes a first pressure roller 101 and a second pressure roller 102 arranged side by side, and a reinforcing plate 103 disposed on the outer surface of the first pressure roller 101 and the outer surface of the second pressure roller 102. The axes of the first pressure roller 101 and the second pressure roller 102 are on the same straight line. They are located on opposite sides of the main frame 10 and are rotatably connected to the main frame 10. The surfaces of the first pressure roller 101 and the second pressure roller 102 form the front compaction surface, which is used to cooperate with the rear pressure roller assembly 30 to compact the soil. The reinforcing plate 103 protrudes outside the outline of the first pressure roller 101 and the second pressure roller 102.
[0064] The reinforcement plates 103 increase the mass of the first pressure roller 101 and the second pressure roller 102. On the one hand, this allows the first pressure roller 101 and the second pressure roller 102 to exert greater pressure on the ground, resulting in better compaction; on the other hand, it makes travel and turning more stable. Multiple reinforcement plates 103 are arranged at circumferential intervals along the first pressure roller 101 and multiple reinforcing plates 103 are arranged at circumferential intervals along the second pressure roller 102.
[0065] Specifically, the reinforcing plate 103 has a rectangular plate structure. Multiple identical reinforcing plates 103 facilitate mass production. On the one hand, multiple reinforcing plates 103 can reduce the use of materials and save costs. On the other hand, multiple reinforcing plates 103 are respectively fixed on the first pressure roller 101 and the second pressure roller 102. The reinforcing plates 103 on the first pressure roller 101 are all fixedly connected to the first pressure roller 101, and the reinforcing plates 103 on the second pressure roller 102 are all fixedly connected to the second pressure roller 102. This can increase the stability of the reinforcing plates 103 and prevent the reinforcing plates 103 from falling off during the movement of the first pressure roller 101 and the second pressure roller 102.
[0066] The reinforcing plate 103 on the first pressure roller 101 extends axially less than the axial length of the first pressure roller 101. This reinforcing plate 103 is located on the side of the first pressure roller 101 facing the second pressure roller 102. Similarly, the reinforcing plate 103 on the second pressure roller 102 extends axially less than the axial length of the second pressure roller 102. This reinforcing plate 103 is also located on the side of the second pressure roller 102 facing the first pressure roller 101. The reinforcing plate 103 is located on the side directly opposite the first and second pressure rollers 101, i.e., on the inner side. This results in a greater mass on the inner side of the first and second pressure rollers 101 and 102, placing the center of gravity of the entire adjustable land compaction device in the middle. This prevents the front pressure roller assembly 100 from tipping over due to the greater mass on the outer side during turning, thus making the movement and turning of the front pressure roller assembly 100 more stable. Furthermore, when the operator is seated in the driver's seat 60, the first pressure roller 101 and the second pressure roller 102 can provide sufficient balancing force to prevent the front pressure roller assembly 100 from tilting up.
[0067] In addition, the minimum axial length of the inner cylinder 31 and outer cylinder 32 is greater than or equal to the distance between the first pressure roller 101 and the second pressure roller 102, the length of the reinforcing plate 103 on the first pressure roller 101 in the axial direction of the first pressure roller 101, and the length of the reinforcing plate 103 on the second pressure roller 102 in the axial direction of the second pressure roller 102, so as to repeat the travel path of the reinforcing plate 103 through the inner cylinder 31 and the outer cylinder 32. Since the reinforcing plate 103 on the first pressure roller 101 protrudes from the outer surface of the first pressure roller 101, and the reinforcing plate 103 on the second pressure roller 102 protrudes from the outer surface of the second pressure roller 102, the reinforcing plate 103 will press the land into a rectangular groove during the movement of the first pressure roller 101 and the second pressure roller 102, resulting in uneven land. Therefore, the minimum axial length of the inner cylinder 31 and the outer cylinder 32 is set to the above-mentioned length. After the reinforcing plate 103 passes over the land, the inner cylinder 31 and the outer cylinder 32 can press over the rectangular groove pressed by the reinforcing plate 103 on the land, eliminate the rectangular groove, and achieve land leveling.
[0068] Please refer to Figure 1 and Figure 2Furthermore, the self-cleaning land compaction device also includes a driver's seat 60, a steering component 70 connected to the front pressure roller assembly 100, and a pedal 80 connected to the main frame 10. The operating end of the steering component 70 is located in front of the driver's seat 60, so as to change the travel direction of the front pressure roller assembly 100 through the steering component 70. The steering component 70 is connected between the first pressure roller 101 and the second pressure roller 102. The pedal 80 has a foot pedal surface facing the driver's seat 60.
[0069] When leveling and compacting the ground, the operator sits in the driver's seat 60 and controls the direction of travel of the front pressure roller assembly 100 through the steering component 70. The front pressure roller assembly 100 drives the rear pressure roller assembly 30 along the direction of travel determined by the steering component 70. During the movement, the first pressure roller 101 and the second pressure roller 102 of the front pressure roller assembly 100, as well as the inner cylinder 31 and the outer cylinder 32 of the rear pressure roller assembly 30, compact the ground. The front pressure roller assembly 100 and the rear pressure roller assembly 30 move forward together with the operator sitting in the driver's seat 60 while compacting the ground. The operator, sitting in the driver's seat 60, operates the steering component 70 in a driving manner, making operation more convenient.
[0070] The front pressure roller assembly 100 is driven by a driver 90, which drives the first pressure roller 101 and the second pressure roller 102 to rotate. The driver 90 can be a combination of a motor and a transmission assembly. In some embodiments, the steering assembly 70 and the driver 90 can be the same as the steering and drive components of a tractor, respectively.
[0071] The pedal 80 is used by the operator sitting in the driver's seat 60. On the one hand, it facilitates the operator's application of force to the steering assembly 70, thereby enabling quick and agile steering of the front pressure wheel assembly 100. On the other hand, the pedal 80 can distribute the force applied to the driver's seat 60 by the operator, allowing the operator to sit more stably in the driver's seat 60. Two pedals 80 are provided, each corresponding to one of the operator's feet. Multiple anti-slip protrusions are provided on the foot surface of the pedal 80 to increase the friction between the pedal 80 and the operator's feet, allowing the operator to step more stably on the pedal 80.
[0072] The front compaction wheel assembly 100 is connected to the front frame 11 of the main frame 10, and the rear compaction wheel assembly 30 and the driver's seat 60 are connected to the rear frame 12 of the main frame 10. The steering assembly 70 includes a connecting arm 71 connected to the front frame 11 and an operating handle 72 connected to the connecting arm 71. The operating handle 72 forms the operating end of the steering assembly 70, and can be driven to change the travel direction of the front compaction wheel assembly 100 via the connecting arm 71. When the operator rotates the operating handle 72, the force is transmitted to the connecting arm 71, and then to the front compaction wheel assembly 100, causing the front compaction wheel assembly 100 to steer. The steering force of the front compaction wheel assembly 100 is transmitted to the front frame 11 of the main frame 10, and the front frame 11 moves with the front compaction wheel assembly 100, causing the rear frame 12 to move, and then the rear compaction wheel assembly 30 and the driver's seat 60 to move, thus changing the travel direction of the entire adjustable soil compaction device. The hinge between the front frame 11 and the rear frame 12 is used to reduce the offset generated during steering, thereby improving steering performance. The connecting arm 71 is connected to the front frame 11 between the first pressure roller 101 and the second pressure roller 102, and the connecting arm 71 can be directly connected to the front frame 11.
[0073] In practical use, the device operates the first drive unit 25 according to the soil moisture, driving the counterweight assembly 20 to move closer to or further away from the rear pressure roller assembly 30. At the same time, it operates the second drive unit 311, so that the first outer cylinder 321 and the second outer cylinder 322 move to the appropriate position relative to the inner cylinder 31, ensuring that the pressure applied to the soil by the rear pressure roller assembly 30 is appropriate.
[0074] The operator sits in the driver's seat 60, with their feet on the pedals 80 and their hands on the steering assembly 70's operating handle 72. They activate the drive unit 90, which rotates the first and second pressure rollers 101 and 102 of the front pressure roller assembly 100, causing it to move forward. Simultaneously, the rear pressure roller assembly 30 and the operator in the driver's seat 60 move forward together. During this movement, the first and second pressure rollers 101 and 102 of the front pressure roller assembly 100, as well as the inner and outer cylinders 31 and 32 of the rear pressure roller assembly 30, compact and level the ground. When a change of direction is needed, the operator rotates the operating handle 72, which, through the connecting arm 71, causes the front pressure roller assembly 100 to change direction, thereby causing the rear pressure roller assembly 30 to steer via the main frame 10.
[0075] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. An adjustable land compaction device, characterized in that: It includes a main frame, a rear pressure roller assembly, and a counterweight assembly. The counterweight assembly is movably mounted on the main frame and can be driven to change the distance between it and the rear pressure roller assembly. The rear pressure roller assembly includes an inner cylinder and an outer cylinder sleeved outside the inner cylinder. The two are coaxial and slidably fitted. The outer surface of the outer cylinder and the outer surface of the inner cylinder exposed outside the outer cylinder form a rear compaction surface. The outer cylinder slides relative to the inner cylinder to change the area of the rear compaction surface.
2. The adjustable land compaction device as described in claim 1, characterized in that: The counterweight assembly includes a connector movably mounted on the rear frame and a counterweight block fixed to the connector, the connector being drivable to move on the rear frame.
3. The adjustable land compaction device as described in claim 2, characterized in that: The rear frame has a first rack extending from the rear pressure roller assembly away from the rear pressure roller assembly. The counterweight assembly also includes a first gear meshing with the first rack and a first drive unit connected to the first gear. The first gear is rotatably connected to the connector and can rotate under the drive of the first drive unit to drive the connector to move along the first rack.
4. The adjustable land compaction device as described in claim 3, characterized in that: The rear frame includes a horizontal bar, on which a first rack and a counterweight assembly are formed.
5. The adjustable land compaction device as described in claim 1, characterized in that: The outer cylinder includes a first outer cylinder and a second outer cylinder respectively sleeved at both ends of the inner cylinder. The three are coaxial, and the first outer cylinder and the inner cylinder, as well as the second outer cylinder and the inner cylinder, are in sliding fit.
6. The adjustable land compaction device as described in claim 5, characterized in that: The end of the first outer cylinder facing the second outer cylinder has an inclined annular first chamfer surface, and the end of the second outer cylinder facing the first outer cylinder has an inclined annular second chamfer surface.
7. The adjustable land compaction device as described in claim 5, characterized in that: The rear pressure roller assembly also includes a connecting rod, a first sleeve and a second sleeve slidably sleeved on the connecting rod, a first connecting rod fixedly connected to the first sleeve, and a second connecting rod fixedly connected to the second sleeve. The connecting rod is connected to the rear frame, the first connecting rod is rotatably connected to the first outer cylinder, and the second connecting rod is rotatably connected to the second outer cylinder. The first sleeve and the second sleeve can be driven to move towards or away from each other along the extension direction of the connecting rod to change the area of the rear compacted surface.
8. The adjustable land compaction device as described in claim 7, characterized in that: The rear pressure roller assembly also includes a second rack connected to the first sleeve, a third rack connected to the second sleeve, a second gear meshing with the second rack and the third rack, and a second drive unit driving the second gear. The second rack and the third rack are arranged opposite to each other, and can move towards or away from each other under the drive of the second gear.
9. The adjustable land compaction device as described in claim 8, characterized in that: The rear pressure roller assembly also includes a fixed block connected to the connecting rod. A groove is formed inside the fixed block. The second gear is rotatably connected to the fixed block and located in the groove. The second rack and the third rack pass through the groove and are slidably connected to the fixed block. The sliding direction of the second rack relative to the fixed block is the same as the sliding direction of the first outer cylinder relative to the inner cylinder, and the second rack slides synchronously with the first outer cylinder. The sliding direction of the third rack relative to the fixed block is the same as the sliding direction of the second outer cylinder relative to the inner cylinder, and the third rack slides synchronously with the second outer cylinder.
10. The adjustable land compaction device as described in any one of claims 5 to 9, characterized in that: The adjustable land compaction device further includes a first cleaning component and a second cleaning component. The first cleaning component has a first cleaning side that adheres to the outer surface of the first outer cylinder to clean the soil adhering to the outer surface of the first outer cylinder. The second cleaning component has a second cleaning side that adheres to the outer surface of the second outer cylinder to clean the soil adhering to the outer surface of the second outer cylinder.