Amplitude modulation system and road roller with it

Abstract

This invention relates to the field of engineering machinery and equipment technology, specifically to an amplitude adjustment system and a road roller having the same. The amplitude adjustment system includes: an amplitude chamber disposed on a vibrating drum, the amplitude chamber being symmetrically arranged with respect to the excitation force center in the longitudinal direction of the vibrating drum; and a liquid conveying component having a first working state of conveying liquid to the amplitude chamber and a second working state of extracting liquid from the amplitude chamber, the liquid level in the amplitude chamber varying along the height direction of the vibrating drum. In this invention, the amplitude chamber is symmetrically arranged with respect to the excitation force center in the longitudinal direction of the vibrating drum, and the liquid level in the amplitude chamber varies along the height direction of the vibrating drum. The liquid in the amplitude chamber experiences only slight fluctuations, and the eccentricity of the liquid's center of gravity is very small or nonexistent, making the amplitudes at both ends of the vibrating drum almost identical or the same. Furthermore, since only liquid is used, and the liquid is not compressible, the amplitude is stable, and there is no need for gas-related components, simplifying the structure of the amplitude adjustment system.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery and equipment technology, specifically to an amplitude modulation system and a road roller having the same. Background Technology

[0002] A vibratory roller is a type of engineering machinery that uses its own weight and vibration to compact various materials. Its working principle involves the vibration effect of the excitation unit in the vibratory drum, which rearranges the particles in the material being compacted, thus achieving density. Currently, vibratory drums achieve stepless amplitude adjustment by changing the eccentricity of the amplitude adjustment device.

[0003] In the prior art, patent application CN201210042058.3 discloses a liquid continuously variable amplitude vibrator for a vibratory roller. This vibratory roller includes a hydraulic motor, a vibratory shaft, a light pipe, a rotary joint, and a heavy pipe. One end of the vibratory shaft is connected to the output end of the hydraulic motor. The light pipe and heavy pipe are mounted on the vibratory shaft. The light pipe and heavy pipe are arranged symmetrically at 180° and connected by a connecting pipe. Liquid is sealed inside the light pipe and heavy pipe. A rotary joint is installed at the right end of the vibratory shaft. The upper part of the rotary joint is connected to the air inlet of the light pipe via an air inlet pipe, and is also connected to the right side of the hydraulic lock via an upper air inlet pipe. The lower part of the rotary joint is connected to the air inlet of the heavy pipe via an air inlet pipe, and is also connected to the left side of the hydraulic lock via a lower air inlet pipe. The hydraulic lock is sequentially connected to a reversing valve and an air source. This vibrator, by controlling the gas pressure and flow rate, can control the amount of liquid entering the light and heavy pipes, and can steplessly adjust the amplitude of the vibrating wheel, achieving remote intelligent control of the vibratory roller. However, the above-mentioned vibrator has the following disadvantages:

[0004] 1. The left and right movement of the liquid in the light and heavy pipes causes the excitation force to be eccentric, which will result in inconsistent amplitude at both ends of the vibrating wheel;

[0005] 2. Because gas is compressible, when the vibrator rotates at high speed, the liquid will be thrown to one side, the piston position will not be fixed, and the amplitude will not be stable.

[0006] 3. The vibratory wheel has a complex structure, is inconvenient to disassemble and install, and is too costly to be practically applied. Summary of the Invention

[0007] The main objective of this invention is to provide an amplitude modulation system and a road roller having the same, so as to solve or improve at least one technical problem of the vibratory wheel in the prior art.

[0008] To achieve the above objectives, the present invention provides an amplitude modulation system, comprising: an amplitude-modulating cavity disposed on a vibrating wheel, the amplitude-modulating cavity being symmetrically arranged with respect to the excitation force center in the length direction of the vibrating wheel; and a liquid conveying component having a first working state of conveying liquid to the amplitude-modulating cavity and a second working state of extracting liquid from the amplitude-modulating cavity, wherein the liquid level in the amplitude-modulating cavity varies along the height direction of the vibrating wheel.

[0009] Optionally, the vibrating wheel includes: an outer wheel ring; an inner wheel ring disposed inside the outer wheel ring; and two first plates disposed at intervals inside the outer wheel ring, with the inner wheel ring fixed on at least one of the two first plates, the outer wheel ring, the inner wheel ring, and the two first plates forming an amplitude-changing cavity.

[0010] Optionally, the liquid conveying component includes a liquid storage unit and a conveying pump. The liquid storage unit has a liquid storage chamber for storing liquid. The liquid storage unit, the conveying pump, and the amplitude-changing chamber are connected by multiple conveying pipes to form a first flow path that conveys liquid from the liquid storage chamber to the amplitude-changing chamber and a second flow path that conveys liquid from the amplitude-changing chamber to the liquid storage chamber. When the first flow path is in a flowing state, the second flow path is in a closed state; when the first flow path is in a closed state, the second flow path is in a flowing state.

[0011] Optionally, at least one of the two first plates is provided with a first vent hole, a first water-proof venting element is provided at the first vent hole, and a second vent hole is provided at the top of the liquid storage component; or, the top of the liquid storage component is provided with a second vent hole, and a second water-proof venting element is provided at the second vent hole.

[0012] Optionally, the delivery pump is provided with a plurality of delivery pipes, including a first delivery pipe, a second delivery pipe, a third delivery pipe, a fourth delivery pipe, a fifth delivery pipe, and a sixth delivery pipe. The first end of the first delivery pipe extends into the amplitude-changing chamber, and its second end is connected to the first end of the second delivery pipe. The second end of the second delivery pipe is connected to the inlet of the delivery pump. The first end of the third delivery pipe is connected to the second ends of the first and second delivery pipes, and its second end is connected to the outlet of the delivery pump. The first end of the fourth delivery pipe extends into the storage chamber, and its second end is connected to the first end of the fifth delivery pipe. The second end of the fifth delivery pipe is connected to the inlet of the delivery pump. The first end of the sixth delivery pipe is connected to the second ends of the fourth and fifth delivery pipes, and its second end is connected to the outlet of the delivery pump. A first switching valve is provided on the second delivery pipe, a second switching valve is provided on the third delivery pipe, a third switching valve is provided on the fifth delivery pipe, and a fourth switching valve is provided on the sixth delivery pipe. When the first and fourth switching valves are in the open state, the second and third switching valves are in the closed state. When the fourth switch valve is closed, the second and third switch valves are open. Alternatively, there are two delivery pumps, namely the first delivery pump and the second delivery pump. Multiple delivery pipes include the first delivery pipe, the second delivery pipe, the third delivery pipe, the fourth delivery pipe, the fifth delivery pipe, and the sixth delivery pipe. The first end of the first delivery pipe extends into the amplitude-changing chamber and the second end is connected to the first end of the second delivery pipe. The second end of the second delivery pipe is connected to the inlet of the first delivery pump. The first end of the third delivery pipe is connected to the second end of the first delivery pipe and the first end of the second delivery pipe, and the second end is connected to the outlet of the second delivery pump. The first end of the fourth delivery pipe extends into the storage chamber and the second end is connected to the first end of the fifth delivery pipe. The second end of the fifth delivery pipe is connected to the inlet of the second delivery pump. The first end of the sixth delivery pipe is connected to the second end of the fourth delivery pipe and the first end of the fifth delivery pipe, and the second end is connected to the outlet of the first delivery pump. One of the first and second delivery pumps is in a working state, and the other of the first and second delivery pumps is in a stopped state.

[0013] Optionally, the second end of the first conveying pipe, the first end of the second conveying pipe, and the first end of the third conveying pipe are connected by a first connector, and / or the second end of the fourth conveying pipe, the first end of the fifth conveying pipe, and the first end of the sixth conveying pipe are connected by a second connector.

[0014] Optionally, the vibrating wheel also includes a traveling support, which is fixed to the first plate. A conveying pipe includes a first pipe and a second pipe, which are connected by a first rotary joint. The first pipe is located in the amplitude-changing cavity, and the second pipe is fixed to the traveling support.

[0015] Optionally, the delivery pump is fixed to the frame, and a delivery pipe also includes a third pipe, which is connected to the second pipe via a second rotary joint.

[0016] Optionally, the vibrating wheel is connected to the frame, and at least one of the front crossbeam and the rear crossbeam of the frame forms a liquid reservoir, with the front crossbeam located on the front side of the vibrating wheel and the rear crossbeam located on the rear side of the vibrating wheel.

[0017] The present invention also provides a road roller, comprising: a frame, a vibrating wheel, and an amplitude adjustment system, wherein the vibrating wheel is mounted on the frame, and the amplitude adjustment system is the amplitude adjustment system described above.

[0018] The technical solution of this invention has the following advantages: Liquid is supplied to the amplitude-changing chamber via a liquid conveying component, or liquid is extracted from the amplitude-changing chamber. The mass of the liquid in the amplitude-changing chamber varies within a certain range, causing the amplitude of the vibrating wheel to continuously change within a certain range, thus achieving stepless amplitude variation of the vibrating wheel. The amplitude-changing chamber is symmetrically arranged with respect to the excitation force center in the length direction of the vibrating wheel. During the rotation of the vibrating wheel, the liquid level in the amplitude-changing chamber changes along the height direction of the vibrating wheel, resulting in only slight fluctuations in the liquid. The degree of eccentricity of the liquid's center of gravity is very small or nonexistent, making the amplitudes at both ends of the vibrating wheel almost identical or the same. Furthermore, since only liquid is used, and liquid is not compressible, the amplitude is more stable than that of exciters in the prior art. It also eliminates the need for gas-related components, simplifying the structure of the amplitude-regulating system, with minimal cost increase, enabling rapid industrialization. This invention solves or improves the technical problems in the prior art where the lateral movement of liquid in the light and heavy pipes causes eccentricity of the excitation force, resulting in inconsistent amplitudes at both ends of the vibrating wheel; the compressibility of gas makes it impossible to fix the piston position, leading to unstable amplitude; and the complex structure causes inconvenience in disassembly and assembly, and high costs. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A partial cross-sectional schematic diagram of a road roller provided in a first embodiment of the present invention is shown;

[0021] Figure 2 It shows Figure 1 A cross-sectional view of the road roller from another angle;

[0022] Figure 3 A partial cross-sectional schematic diagram of a road roller provided in a second embodiment of the present invention is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. Outer wheel rim; 20. First plate; 30. Conveying pump; 41. First conveying pipe; 411. First pipe; 412. Second pipe; 413. Third pipe; 42. Second conveying pipe; 43. Third conveying pipe; 44. Fourth conveying pipe; 45. Fifth conveying pipe; 46. Sixth conveying pipe; 47. Connecting pipe; 51. First switching valve; 52. Second switching valve; 53. Third switching valve; 54. Fourth switching valve; 61. First connector; 62. Second connector; 63. First rotary joint; 64. Second rotary joint; 71. Traveling support; 81. Front crossbeam; 82. Rear crossbeam; 83. Side plate; 90. Liquid; 100. Inner wheel rim; 110. Second plate; 120. First water-proof and breathable component. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] like Figure 1 and Figure 2As shown, the amplitude modulation system of this embodiment includes: an amplitude-changing cavity and a liquid conveying component. The amplitude-changing cavity is disposed on the vibrating wheel and is arranged symmetrically with respect to the excitation force center in the length direction of the vibrating wheel. The liquid conveying component has a first working state of conveying liquid to the amplitude-changing cavity and a second working state of extracting liquid from the amplitude-changing cavity. The liquid level in the amplitude-changing cavity changes along the height direction of the vibrating wheel.

[0031] The amplitude modulation system of this embodiment delivers liquid to or extracts liquid from the amplitude modulation chamber via a liquid conveying component. The mass of the liquid in the amplitude modulation chamber varies within a certain range, causing the amplitude of the vibrating wheel to continuously change within a certain range, thus achieving stepless amplitude modulation of the vibrating wheel. The amplitude modulation chamber is symmetrically arranged with respect to the excitation force center in the length direction of the vibrating wheel. During the rotation of the vibrating wheel, the liquid level in the amplitude modulation chamber changes along the height direction of the vibrating wheel, and the liquid in the amplitude modulation chamber only experiences slight fluctuations. The degree of eccentricity of the liquid's center of gravity is very small or non-existent, making the amplitudes at both ends of the vibrating wheel almost identical or the same. Furthermore, since only liquid is used, and liquid is not compressible, the amplitude is more stable than that of exciters in the prior art. It also eliminates the need for gas-related components, simplifying the structure of the amplitude modulation system, increasing costs only slightly, and enabling rapid industrialization. It can solve or improve the technical problems in the prior art, such as inconsistent amplitudes at both ends of the vibrating wheel caused by eccentricity of the excitation force due to the lateral movement of liquid in the light and heavy pipes, unstable amplitudes due to the inability to fix the piston position caused by the compressibility of gas, and inconvenient disassembly and assembly and high costs due to complex structures.

[0032] In this embodiment, the vibrating wheel includes an outer ring 10, an inner ring 100, and two first flanges 20. The inner ring 100 is disposed within the outer ring 10. The two first flanges 20 are spaced apart within the outer ring 10, and the inner ring 100 is fixed to one of the two first flanges 20. The outer ring 10, inner ring 100, and two first flanges 20 form an amplitude-changing cavity. The outer ring 10, inner ring 100, and two first flanges 20 form a sealed amplitude-changing cavity for a liquid. This eliminates the need for lightweight or heavy pipes, resulting in a simpler structure, minimal cost increase, and rapid industrialization. As an alternative implementation, two amplitude-changing cavities are spaced apart and symmetrically arranged with respect to the excitation force center along the length of the vibrating wheel. For example, four flanges can be provided, forming two pairs. One pair of flanges, the outer ring, and the inner ring form one amplitude-changing cavity, and the other pair of flanges, the outer ring, and the inner ring form another amplitude-changing cavity.

[0033] In this embodiment, the liquid conveying component includes a liquid storage unit and a delivery pump 30. The liquid storage unit has a storage chamber for storing liquid, and the delivery pump 30 is connected to multiple delivery pipes. The liquid storage unit, the delivery pump 30, and the amplitude transformer are connected through the multiple delivery pipes to form a first flow path that delivers liquid from the storage chamber to the amplitude transformer and a second flow path that delivers liquid from the amplitude transformer to the storage chamber. When the first flow path is in a flowing state, the second flow path is in a closed state; when the first flow path is in a closed state, the second flow path is in a flowing state. By controlling the delivery pump 30, the first flow path, and the second flow path, the liquid in the amplitude transformer is extracted or drawn in, which is simple to control.

[0034] In this embodiment, the delivery pump 30 is provided with a plurality of delivery pipes including a first delivery pipe 41, a second delivery pipe 42, a third delivery pipe 43, a fourth delivery pipe 44, a fifth delivery pipe 45, and a sixth delivery pipe 46. The first end of the first delivery pipe 41 extends into the amplitude-changing chamber, and its second end is connected to the first end of the second delivery pipe 42. The second end of the second delivery pipe 42 is connected to the inlet of the delivery pump 30. The first end of the third delivery pipe 43 is connected to the second ends of the first delivery pipe 41 and the second delivery pipe 42, and its second end is connected to the outlet of the delivery pump 30. The first end of the fourth delivery pipe 44 extends into the storage chamber, and its second end is connected to the first end of the fifth delivery pipe 45. The fifth delivery pipe 45... The first end of the sixth delivery pipe 46 is connected to the inlet of the delivery pump 30. The first end of the sixth delivery pipe 46 is connected to the second end of the fourth delivery pipe 44 and the first end of the fifth delivery pipe 45, and the second end of the fifth delivery pipe 45 is connected to the outlet of the delivery pump 30. A first switching valve 51 is provided on the second delivery pipe 42, a second switching valve 52 is provided on the third delivery pipe 43, a third switching valve 53 is provided on the fifth delivery pipe 45, and a fourth switching valve 54 is provided on the sixth delivery pipe 46. When the first switching valve 51 and the fourth switching valve 54 are in the open state, the second switching valve 52 and the third switching valve 53 are in the closed state; when the first switching valve 51 and the fourth switching valve 54 are in the closed state, the second switching valve 52 and the third switching valve 53 are in the open state. The first delivery pipe 41, the second delivery pipe 42, the delivery pump 30, the sixth delivery pipe 46, and the fourth delivery pipe 44 form a second flow path, and the fourth delivery pipe 44, the fifth delivery pipe 45, the delivery pump 30, the third delivery pipe 43, and the first delivery pipe 41 form a first flow path. The above structure only requires one mounting hole for installing the first delivery pipe 41 on the amplitude-changing cavity and one mounting hole for installing the fourth delivery pipe 44 on the liquid storage component, reducing the number of processing steps and the number of parts and processes for sealing the mounting holes.

[0035] In this embodiment, one of the two first plates 20 is provided with a first vent hole, and a first water-proof venting element 120 is provided at the first vent hole. The top of the liquid storage component is provided with a second vent hole, and a second water-proof venting element is provided at the second vent hole. The placement of the first water-proof venting element 120 and the second water-proof venting element facilitates the flow of liquid during amplitude adjustment and avoids the formation of negative pressure obstruction in the liquid storage chamber and the amplitude adjustment chamber. As an alternative embodiment, the top of the liquid storage component is provided with a second vent hole, but no second water-proof venting element is provided at the second vent hole.

[0036] In this embodiment, both the first and second water-proof and breathable components 120 are water-proof and breathable valves. A water-proof and breathable valve is a component formed by combining a water-proof and breathable membrane with other materials such as plastic, metal, and silicone through injection molding, ultrasonic welding, or other methods. The water-proof and breathable valve facilitates connection with the first plate and the liquid storage component, improving installation efficiency. As an alternative implementation, both the first and second water-proof and breathable components are water-proof and breathable membranes.

[0037] In this embodiment, the first switching valve 51, the second switching valve 52, the third switching valve 53, and the fourth switching valve 54 are solenoid valves. The valves are opened or closed by energizing or de-energizing them. When the first switching valve 51 and the fourth switching valve 54 are energized, and the second switching valve 52 and the third switching valve 53 are de-energized, the delivery pump 30 is energized, allowing liquid in the amplitude-changing chamber to be pumped into the storage chamber. Conversely, when the first switching valve 51 and the fourth switching valve 54 are de-energized, and the second switching valve 52 and the third switching valve 53 are energized, liquid in the storage chamber is pumped into the amplitude-changing chamber, enabling continuous variation of the vibrating mass of the vibrating wheel within a certain range, thus continuously varying the amplitude of the vibrating wheel within a certain range, achieving stepless amplitude variation of the vibrating wheel. As an alternative implementation, the first switching valve 51, the second switching valve, the third switching valve 53, and the fourth switching valve 54 can also be opened or closed using electric, pneumatic, or other methods.

[0038] In this embodiment, the second end of the first conveying pipe 41, the first end of the second conveying pipe 42, and the first end of the third conveying pipe 43 are connected by a first connector 61. The first connector 61 is a tee connector, which simplifies the connection and improves assembly efficiency. As an alternative implementation, the second end of the first conveying pipe 41, the first end of the second conveying pipe 42, and the first end of the third conveying pipe 43 can also be directly welded together.

[0039] In this embodiment, the second end of the fourth conveying pipe 44, the first end of the fifth conveying pipe 45, and the first end of the sixth conveying pipe 46 are connected by a second connector 62. The second connector 62 is a tee connector, which simplifies the connection and improves assembly efficiency. As an alternative implementation, the second end of the fourth conveying pipe 44, the first end of the fifth conveying pipe 45, and the first end of the sixth conveying pipe 46 can also be directly welded together.

[0040] In this embodiment, the outlets of the third delivery pipe 43, the sixth delivery pipe 46, and the delivery pump 30 are connected by a T-joint, which facilitates connection and improves installation efficiency. The inlet of the second delivery pipe 42, the fifth delivery pipe 45, and the delivery pump 30 is also connected by a T-joint, which facilitates connection and improves installation efficiency.

[0041] In this embodiment, the vibrating wheel also includes a traveling support 71, which is fixed on the first plate 20. The first conveying pipe 41 includes a first pipe 411 and a second pipe 412, which are connected by a first rotary joint 63. The first pipe 411 is located in the amplitude variation chamber, and the second pipe 412 is fixed on the traveling support 71. When there is liquid 90 in the amplitude variation chamber, the inlet of the first pipe 411 is located in the liquid in the amplitude variation chamber. When the vibrating wheel rotates, the first rotary joint 63 ensures that the inlet of the first pipe 411 is always at the bottom of the amplitude variation chamber.

[0042] In this embodiment, the first plate 20 is annular. The outer side of the traveling support 71 is fixed to the inner side of the first plate 20. The traveling support 71 has a stepped through hole. A fixing plate is fixed in the larger section of the stepped through hole of the traveling support 71. One end of the second pipe 412 and the first rotary joint 63 are fixed to the fixing plate, and the other end of the second pipe 412 passes through the smaller section of the stepped through hole. The fixing plate is fixed to the traveling support 71 with screws, which is simple to use. The second pipe 412 is welded to the fixing plate, making the fixation more secure and reliable. The first pipe 411 is made of metal, for example, steel, i.e., the first pipe 411 is a steel pipe. Metal pipes are heavy, and when the road roller travels, the inlet of the first pipe 411 is always at the bottom of the amplitude chamber of the vibrating wheel due to gravity. The second pipe 412 is also made of metal, for example, steel, i.e., the second pipe 412 is a steel pipe.

[0043] In this embodiment, the delivery pump 30 is fixed to the frame. The first delivery pipe 41 also includes a third pipe 413, which is connected to the second pipe 412 via a second rotary joint 64. The second rotary joint 64 ensures normal liquid delivery. The delivery pump 30, the first switching valve 51, the second switching valve, the third switching valve 53, and the fourth switching valve 54 are fixed to the side plate 83 of the frame. As an alternative embodiment, the delivery pump 30 is fixed to the outer wheel rim 10, or the delivery pump 30 is fixed to the front or rear crossbeam of the frame.

[0044] In this embodiment, the vibrating wheel is connected to the frame. The front crossbeam 81 and rear crossbeam 82 of the frame form a liquid reservoir. The front crossbeam 81 is located on the front side of the vibrating wheel, and the rear crossbeam 82 is located on the rear side of the vibrating wheel. This eliminates the need for a separate liquid reservoir, reducing the number of parts and lowering costs. Furthermore, since the liquid reservoir is not located on the vibrating wheel, the excitation force is not eccentric, ensuring consistent amplitude at both ends of the vibrating wheel. The bottom of the cavity of the front crossbeam 81 and the bottom of the cavity of the rear crossbeam 82 are connected by a connecting pipe 47. This connecting pipe 47 allows liquid in the cavity of the front crossbeam 81 to flow into the cavity of the rear crossbeam 82, and vice versa. This results in a simultaneous decrease or increase in the amount of liquid in both cavities, preventing frame tilting and extending the frame's service life. As an alternative implementation, the front crossbeam 81 forms a liquid reservoir, or the rear crossbeam 82 forms a liquid reservoir, or a liquid reservoir is provided separately, and the liquid reservoir can be fixed to the side plate of the frame, the front crossbeam, the rear crossbeam, or other fixed components.

[0045] In this embodiment, the third pipe 413, the second conveying pipe 42, the third conveying pipe 43, the fourth conveying pipe 44, the fifth conveying pipe 45, the sixth conveying pipe 46, and the connecting pipe 47 are all flexible hoses for easy connection.

[0046] In this embodiment, both the front and rear crossbeams are box-shaped structures, which facilitates the formation of liquid storage chambers, and the structure is simple, reducing costs.

[0047] In this embodiment, the vibrating wheel further includes a second plate 110, which is fixed to the outer wheel rim 10 and located between the two first plates 20. One end of the inner wheel rim 100 is connected to one of the first plates 20 and the other end is connected to the second plate 110. The second plate 110 has a connecting port. One first plate 20, the second plate 110, the outer wheel rim 10, and the inner wheel rim 100 form a first cavity, and the other first plate 20, the second plate 110, and the outer wheel rim 10 form a second cavity. The first cavity and the second cavity form an amplitude-changing cavity, and the first cavity and the second cavity are connected through the connecting port. As an alternative embodiment, the second plate 110 is not provided, and both ends of the inner wheel rim 100 are fixed to the two first plates 20 respectively.

[0048] As an alternative implementation, the plurality of delivery pipes include a first delivery pipe, a second delivery pipe, a third delivery pipe, and a fourth delivery pipe. The first end of the first delivery pipe extends into the amplitude-changing chamber and the second end is connected to the inlet of the delivery pump 30. The first end of the second delivery pipe extends into the storage chamber and the second end is connected to the outlet of the delivery pump 30. The first end of the third delivery pipe extends into the storage chamber and the second end is connected to the inlet of the delivery pump 30. The first end of the fourth delivery pipe extends into the amplitude-changing chamber and the second end is connected to the outlet of the delivery pump 30. A first switching valve is provided on the first delivery pipe, a second switching valve is provided on the second delivery pipe, a third switching valve is provided on the third delivery pipe, and a fourth switching valve is provided on the fourth delivery pipe. When the first and second switching valves are open, the third and fourth switching valves are closed; when the first and second switching valves are closed, the third and fourth switching valves are open.

[0049] Example 2

[0050] Figure 3 The structure of a second embodiment of the road roller of the present invention is shown. The difference between the road roller of the second embodiment and the one of the first embodiment is the number of delivery pumps 30. In the second embodiment, there are two delivery pumps 30, namely a first delivery pump and a second delivery pump. Multiple delivery pipes include a first delivery pipe 41, a second delivery pipe 42, a third delivery pipe 43, a fourth delivery pipe 44, a fifth delivery pipe 45, and a sixth delivery pipe 46. The first end of the first delivery pipe 41 extends into the luffing chamber, and the second end is connected to the first end of the second delivery pipe 42. The second end of the second delivery pipe 42 is connected to the inlet of the first delivery pump. The first end of the third delivery pipe 43... The first end of the fourth delivery pipe 44 is connected to the second end of the first delivery pipe 41 and the first end of the second delivery pipe 42, and the second end of the second delivery pipe 44 is connected to the outlet of the second delivery pump. The first end of the fourth delivery pipe 44 extends into the storage chamber and the second end of the fifth delivery pipe 45 is connected to the first end of the fifth delivery pipe 45. The second end of the fifth delivery pipe 45 is connected to the inlet of the second delivery pump. The first end of the sixth delivery pipe 46 is connected to the second end of the fourth delivery pipe 44 and the first end of the fifth delivery pipe 45, and the second end of the sixth delivery pipe 46 is connected to the outlet of the first delivery pump. One of the first delivery pump and the second delivery pump is in a working state, and the other of the first delivery pump and the second delivery pump is in a stopped state.

[0051] The first delivery pipe 41, the second delivery pipe 42, the first delivery pump, the sixth delivery pipe 46, and the fourth delivery pipe 44 form the second flow path, while the fourth delivery pipe 44, the fifth delivery pipe 45, the second delivery pump, the third delivery pipe 43, and the first delivery pipe 41 form the first flow path. When the first delivery pump is working and the second delivery pump is not working, the second flow path is in a flowing state, and the first flow path is in a closed state. The first delivery pump delivers the liquid in the amplitude-changing chamber to the storage chamber. When the first delivery pump is not working and the second delivery pump is working, the first flow path is in a flowing state, and the second flow path is in a closed state. The second delivery pump delivers the liquid in the storage chamber to the amplitude-changing chamber. The liquid delivery component uses two delivery pumps. One delivery pump draws the liquid from the amplitude-changing chamber to the storage chamber, and the other delivery pump draws the liquid from the storage chamber to the amplitude-changing chamber. By controlling the energization or de-energization of the two delivery pumps, the liquid in the amplitude-changing chamber can be drawn out or drawn in, thereby changing the vibrating mass to achieve stepless amplitude regulation.

[0052] The present invention also provides a road roller, such as Figure 1 and Figure 2 As shown, it includes: a frame, a vibrating wheel, and an amplitude adjustment system. The vibrating wheel is mounted on the frame, and the amplitude adjustment system is the amplitude adjustment system described above.

[0053] In this embodiment, the road roller also includes a vibrator, which includes a vibration motor, a vibration shaft, two amplitude adjustment mechanisms, a vibration bearing, and a coupling. The vibration motor is connected to the vibration shaft through the coupling. The vibration bearing is sleeved on the vibration shaft and connected to the amplitude plate. The two amplitude adjustment mechanisms are spaced apart on the vibration shaft. The vibration shaft is located inside the inner wheel rim 100.

[0054] In this embodiment, the amplitude modulation system also includes two amplitude modulation mechanisms, which are mounted on the vibration shaft and located within the inner rim 100. The amplitude modulation mechanisms can adopt the structure of the prior art, and will not be described in detail here.

[0055] In this embodiment, the vehicle frame includes a front frame and a rear frame, which are hinged together and can rotate relative to each other.

[0056] In this embodiment, the front frame includes two side plates 83, a front crossbeam 81, and a rear crossbeam 82. The two side plates 83 are arranged opposite to each other, and the vibrating wheel is rotatably connected to the two side plates 83. The front crossbeam 81 and the rear crossbeam 82 are both connected to the two side plates 83. The front crossbeam 81 is located in front of the vibrating wheel, and the rear crossbeam 82 is located behind the vibrating wheel.

[0057] Amplitude formula: A=∑me / M, where A is the theoretical amplitude in m; m is the exciter mass in kg; e is the exciter eccentricity in m; me is the static eccentricity of the exciter; and M is the participating mass in kg.

[0058] The aforementioned vibrating wheel uses liquid for counterweight, and a delivery pump is used to extract or pump the liquid out of the vibrating wheel, thereby changing the vibrating mass to achieve stepless amplitude adjustment.

[0059] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0060] By keeping the original amplitude adjustment mechanism structure of the vibrating wheel unchanged, the amplitude is changed by altering the weight of the liquid inside the vibrating wheel. This effectively solves the problems of inconsistent amplitudes at both ends of the vibrating wheel, unstable amplitude, and complex amplitude adjustment device structure. The structure is simple, and the cost increase is minimal, enabling rapid industrialization.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An amplitude modulation system characterized by, The application relates to a vibrating wheel, comprising: a variable-amplitude cavity arranged on the vibrating wheel, the variable-amplitude cavity being arranged symmetrically with respect to a vibration excitation center of the vibrating wheel in a length direction of the vibrating wheel; a liquid conveying component having a first working state of conveying liquid to the variable-amplitude cavity and a second working state of pumping liquid in the variable-amplitude cavity, a liquid level of the liquid in the variable-amplitude cavity varying in a height direction of the vibrating wheel; the liquid conveying component comprises a liquid storage member and a conveying pump (30), the liquid storage member having a liquid storage cavity for storing liquid, the liquid storage member, the conveying pump (30) and the variable-amplitude cavity being connected through a plurality of conveying pipes and forming a first flow path for conveying liquid in the liquid storage cavity to the variable-amplitude cavity and a second flow path for conveying liquid in the variable-amplitude cavity to the liquid storage cavity; the vibrating wheel comprises: an outer rim (10); an inner rim (100) arranged in the outer rim (10); two first amplitude plates (20) arranged in the outer rim (10) at intervals, the inner rim (100) being fixed to at least one of the two first amplitude plates (20), the outer rim (10), the inner rim (100) and the two first amplitude plates (20) forming the variable-amplitude cavity; the vibrating wheel further comprises a second amplitude plate (110) fixed to the outer rim (10) and located between the two first amplitude plates (20), one end of the inner rim (100) being connected to one of the first amplitude plates (20) and the other end being connected to the second amplitude plate (110), the second amplitude plate (110) being provided with a communication port, one of the first amplitude plates (20), the second amplitude plate (110), the outer rim (10) and the inner rim (100) forming a first cavity, the other of the first amplitude plates (20), the second amplitude plate (110) and the outer rim (10) forming a second cavity, the first cavity and the second cavity forming the variable-amplitude cavity, and the first cavity and the second cavity being communicated through the communication port; the vibrating wheel further comprises a walking support (71) fixed to the first amplitude plate (20), one of the conveying pipes comprises a first pipe (411) and a second pipe (412), the first pipe (411) and the second pipe (412) being connected through a first rotary joint (63), the first pipe (411) being located in the second cavity, and the second pipe (412) being fixed to the walking support (71).

2. The amplitude modulation system of claim 1, wherein when the first flow path is in a flow-through state, the second flow path is in a cut-off state; and when the first flow path is in a cut-off state, the second flow path is in a flow-through state.

3. The amplitude modulation system of claim 2, wherein at least one of the two first amplitude plates (20) is provided with a first air-permeable hole, the first air-permeable hole being provided with a first water-proof air-permeable member (120), a top of the liquid storage member is provided with a second air-permeable hole, or a top of the liquid storage member is provided with a second air-permeable hole, and the second air-permeable hole is provided with a second water-proof air-permeable member.

4. The amplitude modulation system of claim 2, wherein The conveying pump (30) is provided with one, multiple conveying pipes including a first conveying pipe (41), a second conveying pipe (42), a third conveying pipe (43), a fourth conveying pipe (44), a fifth conveying pipe (45) and a sixth conveying pipe (46), the first end of the first conveying pipe (41) extends into the amplitude cavity and the second end is connected with the first end of the second conveying pipe (42), the second end of the second conveying pipe (42) is connected with the liquid inlet of the conveying pump (30), the first end of the third conveying pipe (43) is connected with the second end of the first conveying pipe (41) and the first end of the second conveying pipe (42) and the second end is connected with the liquid outlet of the conveying pump (30), the first end of the fourth conveying pipe (44) extends into the liquid storage cavity and the second end is connected with the first end of the fifth conveying pipe (45), the second end of the fifth conveying pipe (45) is connected with the liquid inlet of the conveying pump (30), the first end of the sixth conveying pipe (46) is connected with the second end of the fourth conveying pipe (44) and the first end of the fifth conveying pipe (45) and the second end is connected with the liquid outlet of the conveying pump (30), the first switch valve (51) is arranged on the second conveying pipe (42), the second switch valve (52) is arranged on the third conveying pipe (43), the third switch valve (53) is arranged on the fifth conveying pipe (45), the fourth switch valve (54) is arranged on the sixth conveying pipe (46), when the first switch valve (51) and the fourth switch valve (54) are in the open state, the second switch valve (52) and the third switch valve (53) are in the closed state.The first switch valve (51) and the fourth switch valve (54) are in a closed state, and the second switch valve (52) and the third switch valve (53) are in an open state, or the conveying pump (30) is provided with two first conveying pumps and second conveying pumps, and a plurality of conveying pipes include a first conveying pipe (41), a second conveying pipe (42), a third conveying pipe (43), a fourth conveying pipe (44), a fifth conveying pipe (45), and a sixth conveying pipe (46), the first end of the first conveying pipe (41) extends into the amplitude cavity, and the second end is connected with the first end of the second conveying pipe (42), the second end of the second conveying pipe (42) is connected with the liquid inlet of the first conveying pump, the first end of the third conveying pipe (43) is connected with the second end of the first conveying pipe (41) and the first end of the second conveying pipe (42), and the second end is connected with the liquid outlet of the second conveying pump, the first end of the fourth conveying pipe (44) extends into the liquid storage cavity, and the second end is connected with the first end of the fifth conveying pipe (45), the second end of the fifth conveying pipe (45) is connected with the liquid inlet of the second conveying pump, the first end of the sixth conveying pipe (46) is connected with the second end of the fourth conveying pipe (44) and the first end of the fifth conveying pipe (45), and the second end is connected with the liquid outlet of the first conveying pump, one of the first conveying pump and the second conveying pump is in a working state, and the other of the first conveying pump and the second conveying pump is in a stopped state.

5. The amplitude modulation system of claim 4, wherein, The second end of the first delivery pipe (41), the first end of the second delivery pipe (42) and the first end of the third delivery pipe (43) are connected by a first joint (61), and / or the second end of the fourth delivery pipe (44), the first end of the fifth delivery pipe (45) and the first end of the sixth delivery pipe (46) are connected by a second joint (62).

6. The amplitude modulation system of claim 5, wherein, The delivery pump (30) is fixed on the vehicle frame, and one of the delivery pipes further comprises a third pipe (413) connected to the second pipe (412) through a second rotary joint (64).

7. The amplitude modulation system of claim 2, wherein The vibrating wheel is connected to the vehicle frame, at least one of a front cross beam (81) and a rear cross beam (82) of the vehicle frame forms the liquid storage member, the front cross beam (81) is located at the front side of the vibrating wheel, and the rear cross beam (82) is located at the rear side of the vibrating wheel.

8. A road roller characterized by comprising: The application further provides a vehicle comprising: a vehicle frame, a vibrating wheel arranged on the vehicle frame, and an amplitude modulation system according to any one of claims 1 to 7.

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