A vibrating hammer and construction machinery

Abstract

The present invention relates to the technical field of construction machinery, and particularly to a vibratory hammer and construction machinery. The vibratory hammer includes a first eccentric assembly, a second eccentric assembly, an adjustment assembly, and an actuator. The first eccentric assembly and the second eccentric assembly are in transmission connection; the adjustment assembly is in transmission connection with the first eccentric assembly or the second eccentric assembly; the actuator includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism is connected to the first eccentric assembly or the second eccentric assembly to provide driving force for the first eccentric assembly or the second eccentric assembly, and the second transmission mechanism is connected to the adjustment assembly to provide driving force for the adjustment assembly. The cooperation of the first transmission mechanism and the second transmission mechanism can effectively adjust the phase differences of the first eccentric assembly and the second eccentric assembly by the adjustment assembly under actual working conditions. The change of the phase differences of the first eccentric assembly and the second eccentric assembly can change the vibration frequency and amplitude of the vibratory hammer, improving the adaptability of the vibratory hammer.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a vibrating hammer and engineering machinery. Background Art

[0002] The vibration gearbox is a key component of the vibration pile hammer. When the vibration pile hammer is working, the motor drives an eccentric block assembly to rotate at high speed, and drives another eccentric block assembly to rotate at high speed through the gears on the eccentric block assembly. The two eccentric block assemblies are arranged symmetrically, so that the horizontal components of their respective centrifugal forces cancel each other out, and the vertical components are superimposed on each other to form an exciting force, thereby driving the gearbox, the clamping nozzle and the pile body to form high-frequency vibration, thereby causing the vibration liquefaction between the pile body and the soil, reducing the friction between the pile body and the soil, and improving the efficiency of pile driving and pulling.

[0003] When the vibratory hammer is started, the drive unit needs to provide a sufficiently large torque to overcome the gravity and eccentric torque of the entire eccentric block, which increases the starting burden and delays the starting speed of the vibratory pile hammer; secondly, as the speed gradually increases or decreases, resonance will be triggered at a certain moment, causing the vibratory pile hammer shell to produce violent vibration and noise, affecting the surrounding working environment and staff, and also reducing the overall safety performance of the vibratory pile hammer.

[0004] In addition, the exciting force is proportional to the eccentric mass moment and proportional to the square of the rotation speed; and the amplitude is related to the eccentric mass moment. At present, the eccentric mass moment of most vibrating pile hammers is a fixed value, so the amplitude cannot be adjusted during the working process. For different construction geological sections, different frequencies (i.e. exciting forces) and amplitudes are required, which cannot be effectively adjusted, affecting adaptability. At the same time, changing the frequency will affect the exciting force.

[0005] Therefore, there is an urgent need for a vibrating hammer and engineering machinery to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a vibratory hammer which can adjust the frequency and amplitude of the vibratory hammer according to the construction geological section, reduce the impact on the outside world when starting and stopping the vibration, and improve the adaptability of the vibratory hammer.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A vibratory hammer is provided, comprising:

[0009] A first eccentric assembly and a second eccentric assembly, wherein the first eccentric assembly and the second eccentric assembly are transmission-connected;

[0010] an adjusting assembly, drivingly connected to the first eccentric assembly or the second eccentric assembly, so as to adjust the phase difference between the first eccentric assembly and the second eccentric assembly;

[0011] The actuating element includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism is connected to the first eccentric assembly or the second eccentric assembly and is used to provide driving force for the first eccentric assembly or the second eccentric assembly. The second transmission mechanism is connected to the adjustment assembly and is used to provide driving force for the adjustment assembly.

[0012] As a preferred technical solution of the above vibratory hammer, the first eccentric assembly includes a first shaft, a first fixed eccentric unit, and a first adjustable eccentric unit; the first shaft sequentially passes through the first fixed eccentric unit and the first adjustable eccentric unit, and the first fixed eccentric unit and the first adjustable eccentric unit are arranged at intervals;

[0013] The second eccentric assembly includes a second shaft, a second fixed eccentric unit, and a second adjustable eccentric unit; the second shaft sequentially passes through the second fixed eccentric unit and the second adjustable eccentric unit, and the second fixed eccentric unit and the second adjustable eccentric unit are arranged at intervals. The first shaft and the second shaft are arranged in parallel. The first fixed eccentric unit and the second fixed eccentric unit are in transmission connection, and the first adjustable eccentric unit and the second adjustable eccentric unit are in transmission connection;

[0014] The adjustment assembly includes a third shaft and an adjustment unit arranged on the third shaft. The second transmission mechanism is connected to the third shaft, and the adjustment unit is in transmission connection with the first adjustable eccentric unit or the second adjustable eccentric unit.

[0015] As a preferred technical solution of the above vibratory hammer, the first fixed eccentric unit includes a first fixed gear and a first fixed eccentric block. The first fixed eccentric block is fixedly connected to the first fixed gear. The second fixed eccentric unit includes a second fixed gear and a second fixed eccentric block. The second fixed eccentric block is fixedly connected to the second fixed gear. The first fixed gear and the second fixed gear are meshed.

[0016] As a preferred technical solution of the above vibratory hammer, the first adjustable eccentric unit includes a first bearing, a first adjustable gear, and a first adjustable eccentric block. The first adjustable gear and the first adjustable eccentric block are fixedly connected. The first bearing is sleeved on the first shaft. The first adjustable gear and the first adjustable eccentric block are both sleeved on the outer ring of the first bearing. The second adjustable eccentric unit includes a second bearing, a second adjustable gear, and a second adjustable eccentric block. The second adjustable gear and the second adjustable eccentric block are fixedly connected. The second bearing is sleeved on the second shaft. The second adjustable gear and the second adjustable eccentric block are both sleeved on the outer ring of the second bearing. The first adjustable gear and the second adjustable gear are meshed.

[0017] As a preferred technical solution of the above vibratory hammer, the first adjustable eccentric unit further includes a first pressing plate, the second adjustable eccentric unit includes a second pressing plate, the first pressing plate is sleeved on the first shaft and fixedly connected to the first adjustable eccentric block, and the second pressing plate is sleeved on the second shaft and fixedly connected to the second adjustable eccentric block.

[0018] As a preferred technical solution of the above vibratory hammer, the adjusting unit includes an adjusting gear, and the adjusting gear meshes with the first adjustable gear or the second adjustable gear.

[0019] As a preferred technical solution of the above vibratory hammer, the vibratory hammer further includes an angle sensor and a speed sensor, and the angle sensor and the speed sensor are both arranged on the first shaft and the third shaft or the second shaft and the third shaft.

[0020] As a preferred technical solution of the above vibratory hammer, it further includes a hydraulic pump, a main valve and two proportional speed control valve groups. The oil outlet of the hydraulic pump is connected to the oil inlet of the main valve, the oil outlet of the main valve is respectively connected to the oil inlets of the two proportional speed control valve groups. Among the two proportional speed control valve groups, one is connected to the first transmission mechanism, and the other is connected to the second transmission mechanism.

[0021] As a preferred technical solution of the above vibratory hammer, the proportional speed control valve group includes a reversing valve, a first signal oil circuit a, a second signal oil circuit b, a differential pressure feedback valve and an adjustable throttle valve. The main valve is communicated with the oil inlet of the differential pressure feedback valve, the oil outlet of the differential pressure feedback valve is communicated with the oil inlet of the adjustable throttle valve, the oil inlet of the reversing valve is communicated with the oil outlet of the adjustable throttle valve, the oil outlet of the reversing valve is connected to the fuel tank or cut off, both ends of the first signal oil circuit a are respectively connected to the first end of the differential pressure feedback valve and the oil inlet of the adjustable throttle valve, both ends of the second signal oil circuit b are respectively connected to the second end of the differential pressure feedback valve and the oil outlet of the adjustable throttle valve, and a spring is arranged at the second end.

[0022] The present invention also provides a construction machinery, including the above-mentioned vibratory hammer.

[0023] Advantages of the present invention:

[0024] The vibrating hammer of the present invention includes a first eccentric assembly, a second eccentric assembly, an adjustment assembly, and an actuating element. The first eccentric assembly and the second eccentric assembly are in transmission connection; the adjustment assembly is in transmission connection with the first eccentric assembly or the second eccentric assembly to adjust the phase difference between the first eccentric assembly and the second eccentric assembly; the actuating element includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism is connected to the first eccentric assembly or the second eccentric assembly and is used to provide driving force for the first eccentric assembly or the second eccentric assembly. The second transmission mechanism is connected to the adjustment assembly and is used to provide driving force for the adjustment assembly. In the present invention, the first transmission mechanism is connected to the first eccentric assembly or the second eccentric assembly to provide driving force for the first eccentric assembly or the second eccentric assembly, and the second transmission mechanism is connected to the adjustment assembly to provide driving force for the adjustment assembly. The cooperation of the first transmission mechanism and the second transmission mechanism can effectively adjust the phase difference between the first eccentric assembly and the second eccentric assembly under actual working conditions. The change in the phase difference between the first eccentric assembly and the second eccentric assembly can change the vibration frequency and amplitude of the vibrating hammer, thereby reducing the resonance impact on the outside world during the starting and stopping vibration processes, enabling the vibrating hammer to adapt to the requirements of different construction geological sections, and improving the adaptability of the vibrating hammer. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the vibrating hammer provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the positional relationship among the first eccentric assembly, the second eccentric assembly, and the adjustment assembly provided by an embodiment of the present invention;

[0027] Figure 3 is a rear view of the positional relationship among the first eccentric assembly, the second eccentric assembly, and the adjustment assembly provided by an embodiment of the present invention;

[0028] Figure 4 is Figure 3 a cross-sectional view taken along line A-A in

[0029] Figure 5 is a schematic structural diagram of the hydraulic system of the vibrating hammer provided by an embodiment of the present invention.

[0030] In the figure:

[0031] 1. First eccentric assembly; 11. First shaft; 111. Transition spline sleeve; 12. First fixed eccentric unit; 121. First fixed gear; 122. First fixed eccentric block; 13. First adjustable eccentric unit; 131. First bearing; 132. First adjustable gear; 133. First adjustable eccentric block; 134. First pressing plate; 14. First spacer sleeve; 15. Second spacer sleeve;

[0032] 2. Second eccentric assembly; 21. Second shaft; 22. Second fixed eccentric unit; 221. Second fixed gear; 222. Second fixed eccentric block; 23. Second adjustable eccentric unit; 231. Second bearing; 232. Second adjustable gear; 233. Second adjustable eccentric block; 234. Second pressure plate; 24. Third spacer sleeve; 25. Fourth spacer sleeve;

[0033] 3. Adjusting assembly; 31. Third shaft; 32. Adjusting unit;

[0034] 4. First motor;

[0035] 5. Second motor;

[0036] 6. Hydraulic pump;

[0037] 7. Main valve;

[0038] 8. Proportional speed control valve group; 81. Directional control valve; 82. Differential pressure feedback valve; 83. Adjustable throttle valve; 84. Relief valve;

[0039] 91. Locating pin; 92. Bolt; 93. Flat key;

[0040] 101. End bearing; 102. End cover; 103. Bearing housing;

[0041] 100. Vibration housing; 200. End plate. Detailed implementation manners

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that only parts related to the present invention rather than all structures are shown in the drawings for the convenience of description.

[0043] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0045] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] Currently, the eccentric mass moment of most vibratory pile hammers is a fixed value, so the amplitude cannot be adjusted during the working process. For different construction geological sections, when different frequencies and amplitudes are required, it cannot be effectively adjusted, affecting adaptability. At the same time, changing the frequency will affect the exciting force.

[0047] For this reason, this embodiment provides a construction machinery, which can be a pile driver. The pile driver includes a vibratory hammer, and can realize adjustable amplitude of the vibratory hammer during the pile driving process. As Figure 1 shown, the vibratory hammer includes a vibration box body 100, end plates 200, a first eccentric assembly 1, a second eccentric assembly 2, an adjustment assembly 3 and an actuator. Among them, the first eccentric assembly 1, the second eccentric assembly 2 and the adjustment assembly 3 are all arranged in the vibration box body 100. The end plates 200 are arranged on both sides of the vibration box body 100, and the ends of the first eccentric assembly 1, the second eccentric assembly 2 and the adjustment assembly 3 are fixed through the end plates 200. The actuator is arranged outside the vibration box body 100. The first eccentric assembly 1 and the second eccentric assembly 2 are in transmission connection; the adjustment assembly 3 is in transmission connection with the first eccentric assembly 1 or the second eccentric assembly 2 to adjust the phase difference between the first eccentric assembly 1 and the second eccentric assembly 2; the actuator includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism is connected to the first eccentric assembly 1 or the second eccentric assembly 2 and is used to provide driving force for the first eccentric assembly 1 or the second eccentric assembly 2. The second transmission mechanism is connected to the adjustment assembly 3 and is used to provide driving force for the adjustment assembly 3.

[0048] The first transmission mechanism is connected to the first eccentric assembly 1 or the second eccentric assembly 2 to provide driving force for the first eccentric assembly 1 or the second eccentric assembly 2. The second transmission mechanism is connected to the adjustment assembly 3 to provide driving force for the adjustment assembly 3. The first transmission mechanism and the second transmission mechanism cooperate to enable the adjustment assembly 3 to effectively adjust the phase differences of the first eccentric assembly 1 and the second eccentric assembly 2 under actual working conditions. The change in the phase differences of the first eccentric assembly 1 and the second eccentric assembly 2 can change the vibration frequency and amplitude of the vibratory hammer, thereby reducing the resonance impact on the outside world during the starting and stopping of vibration, enabling the vibratory hammer to adapt to the requirements of different construction geological sections, and improving the adaptability of the vibratory hammer.

[0049] Optionally, in this embodiment, as Figure 2 , Figure 3 and Figure 4 shown, the first eccentric assembly 1 includes a first shaft 11, a first fixed eccentric unit 12, and a first adjustable eccentric unit 13; the first shaft 11 sequentially passes through the first fixed eccentric unit 12 and the first adjustable eccentric unit 13, and the first fixed eccentric unit 12 and the first adjustable eccentric unit 13 are arranged at intervals. Specifically, in this embodiment, the first fixed eccentric unit 12 includes a first fixed gear 121 and a first fixed eccentric block 122, and the first fixed eccentric block 122 is fixedly connected to the first fixed gear 121. Exemplarily, the first fixed eccentric block 122 is connected to the first fixed gear 121 through a positioning pin 91, and the first fixed eccentric block 122 is fixedly connected to the first shaft 11 through a bolt 92, thereby realizing the fixed connection between the first fixed gear 121 and the first shaft 11. The first fixed gear 121 and the first fixed eccentric block 122 are key-connected to the first shaft 11 to prevent radial sliding of the first fixed gear 121 and the first fixed eccentric block 122 during the rotation of the first shaft 11. Optionally, the first fixed gear 121 and the first fixed eccentric block 122 are connected to the first shaft 11 through a flat key 93. Of course, it can also be that the first fixed gear 121 and the first fixed eccentric block 122 are connected through a spline or other fixing methods.

[0050] Optionally, in this embodiment, the first adjustable eccentric unit 13 includes a first bearing 131, a first adjustable gear 132, and a first adjustable eccentric block 133. The first adjustable gear 132 and the first adjustable eccentric block 133 are fixedly connected, specifically by bolts 92. The first bearing 131 is sleeved on the first shaft 11, and both the first adjustable gear 132 and the first adjustable eccentric block 133 are sleeved on the outer ring of the first bearing 131. When the first transmission mechanism connected to the first shaft 11 or the second shaft 21 works, both the first shaft 11 and the second shaft 21 will rotate. Due to the first bearing 131, the first adjustable gear 132 and the first adjustable eccentric block 133 do not rotate with the first shaft 11. The first adjustable gear 132 and the first adjustable eccentric block 133 rotate with the second transmission mechanism to adjust the eccentric mass distance between the first eccentric assembly 1 and the second eccentric assembly 2. To limit the first bearing 131 and prevent it from moving axially along the first shaft 11, a first spacer 14 is provided between the first bearing 131 and the first fixed eccentric block 122 in this embodiment. The first spacer 14 is sleeved on the first shaft 11 and abuts against the first fixed eccentric block 122 and the first bearing 131 respectively.

[0051] End bearings 101 are provided at both ends of the first shaft 11. To prevent the first bearing 131 from driving the first fixed eccentric block 122 to slide towards the end bearing 101, a second spacer 15 is provided between the first bearing 131 and the end bearing 101 in this embodiment. The second spacer 15 abuts against the end bearing 101 and the first bearing 131 respectively.

[0052] Basically similar to the structure of the first eccentric assembly 1, refer to Figure 4 , in this embodiment, the second eccentric assembly 2 includes a second shaft 21, a second fixed eccentric unit 22, and a second adjustable eccentric unit 23; the second shaft 21 passes through the second fixed eccentric unit 22 and the second adjustable eccentric unit 23 in sequence, the second fixed eccentric unit 22 and the second adjustable eccentric unit 23 are arranged at intervals, the first shaft 11 and the second shaft 21 are arranged in parallel, the first fixed eccentric unit 12 and the second fixed eccentric unit 22 are in transmission connection, and the first fixed eccentric unit 12 and the second fixed eccentric unit 22 are arranged axially symmetrically. The first adjustable eccentric unit 13 and the second adjustable eccentric unit 23 are in transmission connection. Specifically, the second fixed eccentric unit 22 includes a second fixed gear 221 and a second fixed eccentric block 222. The second fixed eccentric block 222 is fixedly connected to the second fixed gear 221, and the first fixed gear 121 and the second fixed gear 221 are meshed. When either the first shaft 11 or the second shaft 21 rotates, the purpose of both of them rotating simultaneously can be achieved.

[0053] The second fixed eccentric unit 22 is axially symmetrically arranged with the first fixed eccentric unit 12, that is, they are arranged at 180°. The eccentric mass distance of the second fixed eccentric unit 22 is equal to that of the first fixed eccentric unit 12. The second adjustable eccentric unit 23 is axially symmetrically arranged with the first adjustable eccentric unit 13, that is, they are arranged at 180°. The eccentric mass distance of the second adjustable eccentric unit 23 is equal to that of the first adjustable eccentric unit 13. It can be understood that the eccentric mass distance of the second eccentric assembly 2 is equal to that of the first eccentric assembly 1.

[0054] Exemplarily, the second fixed eccentric block 222 is connected to the second fixed gear 221 through a positioning pin 91, and the second fixed eccentric block 222 is fixedly connected to the second shaft 21 through a bolt 92, so as to realize the fixed connection between the second fixed gear 221 and the second shaft 21. The second fixed gear 221 and the second fixed eccentric block 222 are key-connected to the second shaft 21 to prevent radial sliding of the second fixed gear 221 and the second fixed eccentric block 222 during the rotation of the second shaft 21. Optionally, the second fixed gear 221 and the second fixed eccentric block 222 are connected to the second shaft 21 through a flat key 93. Of course, it can also be that the second fixed gear 221 and the second fixed eccentric block 222 are connected by a spline or other fixing methods.

[0055] Optionally, the second adjustable eccentric unit 23 includes a second bearing 231, a second adjustable gear 232 and a second adjustable eccentric block 233. The second adjustable gear 232 and the second adjustable eccentric block 233 are fixedly connected. The second bearing 231 is sleeved on the second shaft 21. The second adjustable gear 232 and the second adjustable eccentric block 233 are both sleeved on the outer ring of the second bearing 231. The first adjustable gear 132 and the second adjustable gear 232 are meshed. When the first transmission mechanism connected to the first shaft 11 or the second shaft 21 works, the first shaft 11 and the second shaft 21 rotate. Due to the second bearing 231, the second adjustable gear 232 and the second adjustable eccentric block 233 do not rotate with the second shaft 21. The second adjustable gear 232 and the second adjustable eccentric block 233 rotate with the rotation of the third shaft 31. Thus, the phase difference between the first eccentric assembly 1 and the second eccentric assembly 2 can be adjusted as needed, and the phase difference can be 0. In order to limit the second bearing 231 and prevent the second bearing 231 from axially moving along the second shaft 21, in this embodiment, a third spacer 24 is provided between the second bearing 231 and the second fixed eccentric block 222. The third spacer 24 is sleeved on the second shaft 21, and the third spacer 24 abuts against the second fixed eccentric block 222 and the second bearing 231 respectively.

[0056] End bearings 101 are provided at both ends of the second shaft 21. In order to prevent the second bearing 231 from moving axially (sliding towards the end bearing 101), a fourth spacer 25 is provided between the second bearing 231 and the end bearing 101 in this embodiment. The fourth spacer 25 abuts against the end bearing 101 and the first bearing 131 respectively to prevent the second bearing 231 from moving axially along the second shaft 21.

[0057] Optionally, in this embodiment, the adjustment assembly 3 includes a third shaft 31 and an adjustment unit 32 provided on the third shaft 31. The second transmission mechanism is connected to the third shaft 31, and the adjustment unit 32 is in transmission connection with the first adjustable eccentric unit 13 or the second adjustable eccentric unit 23. Among them, the first shaft 11, the second shaft 21, and the third shaft 31 are arranged in parallel to ensure that the components can be in transmission connection. The adjustment unit 32 includes an adjustment gear. The third shaft 31 passes through the adjustment gear, and the adjustment gear is key-connected to the third shaft 31. The adjustment gear meshes with the first adjustable gear 132 or the second adjustable gear 232. That is, the adjustment unit 32 can drive the first adjustable gear 132 or the second adjustable gear 232 to rotate, so as to achieve different rotational speeds of the gears on the same shaft, thereby changing the phase difference between the first eccentric assembly 1 and the second eccentric assembly 2, and serving the purpose of adjusting the frequency and the eccentric mass distance.

[0058] During the starting and stopping vibration processes, the first adjustable eccentric block 133 and the first fixed eccentric block 122 on the first shaft 11 are at 180°, that is, the eccentric parts of the first adjustable eccentric block 133 and the first fixed eccentric block 122 are located on both sides of the first shaft 11. The second adjustable eccentric block 233 and the second fixed eccentric block 222 on the second shaft 21 are at 180°, that is, the eccentric parts of the second adjustable eccentric block 233 and the second fixed eccentric block 222 are located on both sides of the second shaft 21. During the starting and stopping vibration processes, the eccentric mass distances of the first fixed eccentric unit and the first adjustable eccentric unit are equal. Correspondingly, the eccentric mass distances of the second fixed eccentric unit and the second adjustable eccentric unit are equal. During the hammering operation, the first drive mechanism and the second drive mechanism need to control the first shaft 11 and the third shaft 31 to rotate at different speeds, so that the first adjustable eccentric block 133 and the first fixed eccentric block 122 are at 0°, and the second adjustable eccentric block 233 and the second fixed eccentric block 222 are at 0°. That is, the rotation of the first shaft 11 and the third shaft 31 is controlled by the first drive mechanism and the second drive mechanism to adjust the phase difference of the first eccentric assembly 1 and the phase difference of the second eccentric assembly 2.

[0059] Optionally, in this embodiment, the first adjustable eccentric unit 13 further includes a first pressing plate 134, and the second adjustable eccentric unit 23 includes a second pressing plate 234. The first pressing plate 134 is sleeved on the first shaft 11 and fixedly connected to the first adjustable eccentric block 133. Exemplarily, the first pressing plate 134 and the first adjustable eccentric block 133 are fixedly connected by bolts 92. The first pressing plate 134 is used to press the first adjustable eccentric block 133 to move towards the end bearing 101 (i.e., axial movement). The second pressing plate 234 is sleeved on the second shaft 21 and fixedly connected to the second adjustable eccentric block 233. Exemplarily, the second pressing plate 234 and the second adjustable eccentric block 233 are fixedly connected by bolts 92. The second pressing plate 234 is used to press the second adjustable eccentric block 233 to move towards the end bearing 101 (i.e., axial movement).

[0060] Since end bearings 101 are provided at both ends of the first shaft 11, the second shaft 21, and the third shaft 31, bearing seats 103 and end covers 102 are respectively provided at both ends of the first shaft 11, the second shaft 21, and the third shaft 31. Among them, the end bearings 101 are arranged in the space formed by the bearing seats 103, and the end covers 102 are located outside the bearing seats 103. The end covers 102 play a good protective role for the end bearings 101. It should be noted that a connection hole through which the first driving mechanism can extend is provided on one of the end covers 102 of the first shaft 11 or the second shaft 21. The first driving mechanism is connected to the first shaft 11 or the second shaft 21 to drive the first shaft 11 or the second shaft 21 to rotate. In this embodiment, a connection hole is provided on one of the end covers 102 corresponding to the first shaft 11. Correspondingly, a receiving hole for receiving the transition spline sleeve 111 is provided at the end of the first shaft 11. The transition spline sleeve 111 is in interference fit, and the output end of the first driving mechanism extends into the transition spline sleeve 111 and is key-connected to the first shaft 11.

[0061] Since the third shaft 31 is connected to the second driving mechanism, a connection hole through which the second driving mechanism can extend is provided on the end cover 102 corresponding to one end of the third shaft 31. A receiving hole for receiving the transition spline sleeve 111 is also provided at the end of the third shaft 31 and the end of the first shaft 11, so as to facilitate the interference fit connection between the second driving mechanism and the third shaft 31. The output end of the second driving mechanism extends into the transition spline sleeve 111 and is key-connected to the third shaft 31.

[0062] The first driving mechanism and the second driving mechanism are used to drive the rotation of the shaft. Therefore, the first driving mechanism and the second driving mechanism are motors or motors, and the selection of the first driving mechanism and the second driving mechanism is specifically based on the actual working conditions. For construction machinery, the first driving mechanism and the second driving mechanism are mostly selected as motors.

[0063] This vibratory hammer is used on a pile driver, and the pile driver belongs to construction machinery. Therefore, in this embodiment, as Figure 5As shown, the first driving mechanism is the first motor 4, and the second driving mechanism is the second motor 5. Both the first motor 4 and the second motor 5 are powered by hydraulic oil provided by the hydraulic pump 6. Therefore, in this embodiment, the vibratory hammer further includes a hydraulic pump 6, a main valve 7, and two proportional speed control valve groups 8. The proportional speed control valve groups 8 control the flow rate of the pressure oil to change the rotational speeds of the first motor 4 and the second motor 5, so as to achieve the purpose of adjusting the frequency and the eccentric mass distance. Among them, the oil outlet of the hydraulic pump 6 is connected to the oil inlet of the main valve 7, the oil outlet of the main valve 7 is respectively connected to the oil inlets of the two proportional speed control valve groups 8. Among the two proportional speed control valve groups 8, one is connected to the first transmission mechanism (i.e., the first motor 4), and the other is connected to the second transmission mechanism (i.e., the second motor 5).

[0064] The first motor 4 rotates under the action of the pressure oil, thereby driving the first shaft 11 and the first fixed eccentric unit 12 provided on the first shaft 11 to rotate. Since the first fixed gear 121 in the first fixed eccentric unit 12 meshes with the second fixed gear 221 in the second fixed eccentric unit 22, the second shaft 21 of the second eccentric assembly 2 is further driven to rotate through gear transmission.

[0065] The proportional speed control valve group 8 includes a reversing valve 81, a differential pressure feedback valve 82 and an adjustable throttle valve 83. The oil outlet of the main valve 7 is communicated with the oil inlet of the differential pressure feedback valve 82, the oil outlet of the differential pressure feedback valve 82 is communicated with the oil inlet of the adjustable throttle valve 83, the oil inlet of the reversing valve 81 is connected to the oil outlet of the adjustable throttle valve 83, and the oil outlet of the reversing valve 81 is connected to or closed by the fuel tank. The proportional speed control valve group 8 further includes a first signal oil circuit a and a second signal oil circuit b. One end of the first signal oil circuit a is connected to the first end of the differential pressure feedback valve 82, and the other end of the first signal oil circuit a is connected to the oil inlet of the adjustable throttle valve 83. The second signal oil circuit b is connected to the second end of the differential pressure feedback valve 82, and a spring is further provided at the second end of the differential pressure feedback valve 82. The first signal oil circuit a and the second signal oil circuit b connected to both ends of the differential pressure feedback valve 82 are respectively located at the front and rear ends of the adjustable throttle valve 83. Therefore, the differential pressure feedback valve 82 makes the differential pressure before and after the adjustable throttle valve 83 a fixed value. Therefore, only by changing the opening area of the adjustable throttle valve 83 can the flow rate be changed to adjust the speed of the motor. The reversing valve 81 controls whether the load feedback pressure of the motor is fed back to the differential pressure feedback valve 82. When the reversing valve 81 is in the upper position, the motor is in a non-operating state at this time, and the motor load feedback pressure communicates with the fuel tank; when the reversing valve 81 is in the lower position, the load feedback pressure is cut off from the fuel tank passage, and the pressure oil flows through the second signal oil circuit b to the second end of the differential pressure feedback valve 82, feeding the oil pressure signal back to one end of the differential pressure feedback valve 82. The differential pressure feedback valve 82 controls the movement of the valve core according to the differential pressure at both ends to control the speeds of the first motor 4 and the second motor 5. Therefore, the speeds of the first motor 4 and the second motor 5 can be the same or different. In addition, since the main valve 7 mainly controls the actions of other actuating components, the oil pressure of the pressure oil passing through the main valve 7 is relatively high, and the differential pressure feedback valve 82 can further reduce the pressure of the pressure oil provided by the main valve 7 so that the pressure oil can be normally supplied to the motor.

[0066] The proportional speed control valve group 8 includes a relief valve 84, and the relief valve 84 is connected to the second signal oil circuit b. The relief valve 84 limits the load feedback pressure for driving the motor to avoid overlimit.

[0067] When the vibratory hammer vibrates, the flow rate of the pressure oil leading to the first motor 4 and the second motor 5 is controlled by the proportional speed control valve group 8, that is, the rotational speeds of the first motor 4 and the second motor 5 are changed, and then the vibration frequency of the vibratory hammer is changed. Optionally, in this embodiment, the vibratory hammer further includes a controller, an angle sensor, and a rotational speed sensor. Angle sensors and speed sensors are arranged on both the first shaft 11 and the second shaft 21, and a speed sensor is arranged on the third shaft 31. The controller is electrically connected to the angle sensor, the rotational speed sensor, the main valve 7, and the hydraulic pump 6. The speed sensors respectively detect the rotational speeds of the first motor 4 and the second motor 5, and then the proportional speed control valve group 8 is controlled through the controller, so that the rotational speeds of the first shaft 11 and the second shaft 21 rotate synchronously with the first adjustable eccentric unit 13 and the second adjustable eccentric unit 23, and the vibration frequency can be changed by changing the rotational speeds of the first motor 4 and the second motor 5. In the natural state, due to the action of gravity, the first fixed eccentric block 122 and the second fixed eccentric block 222 will be at the bottom end in the non-working state, rather than being at 180°. And during the starting and stopping of vibration, resonance of surrounding buildings can be avoided only when the eccentric mass moment is 0. Therefore, the angle sensor is used to detect the rotation angles of the first shaft 11 and the second shaft 21, and is respectively used to judge whether the first adjustable eccentric block 133 and the first fixed eccentric block 122 on the first shaft 11 are in a state of 180°, and whether the second adjustable eccentric block 233 and the second fixed eccentric block 222 on the second shaft 21 are in a state of 180°; if not, the rotational speeds of the first motor 4 and the second motor 5 are controlled to make the first adjustable eccentric block 133 and the first fixed eccentric block 122 at 180° and control the second adjustable eccentric block 233 and the second fixed eccentric block 222 to be set at 180°, to prevent large errors in the amplitude and vibration frequency during the working process, and then the first motor 4 and the second motor 5 are accelerated to work.

[0068] When the hammer head vibrates, the flow rate of the pressure oil leading to the first motor 4 and the second motor 5 is controlled by the proportional speed control valve group 8, that is, the rotational speeds of the first motor 4 and the second motor 5 are changed, and then the vibration frequency of the vibratory hammer is changed; the speed sensors respectively detect the rotational speeds of the first motor 4 and the second motor 5, and then the proportional speed control valve group 8 is controlled through the controller, so that the rotational speeds of the first shaft 11 and the second shaft 21 rotate at the same speed as the second adjustable eccentric unit 23 and the first adjustable eccentric unit 13 rotate, and changing the rotational speed changes the frequency.

[0069] By changing the rotational speeds of the first motor 4 and the second motor 5, the phase differences between the first fixed eccentric unit 12, the second fixed eccentric unit 22 and the first adjustable eccentric unit 13, the second adjustable eccentric unit 23 can be changed, thereby changing the eccentric mass moments of the first eccentric assembly 1 and the second eccentric assembly 2. Since the eccentric mass moments of the first fixed eccentric unit 12 and the first adjustable eccentric unit 13 can be adjusted to be equal, and the eccentric mass moments of the second fixed eccentric unit 22 and the second adjustable eccentric unit 23 can be adjusted to be equal, stepless adjustment of the eccentric mass moments of the first eccentric assembly 1 and the eccentric mass moment of the second eccentric assembly from 0 to the maximum preset value can be achieved. The eccentric mass moment herein refers to the product of the eccentricity and the mass.

[0070] Controlling the rotational speeds of the first motor 4 and the second motor 5 can adjust the phase differences of the eccentric mass moments of the first eccentric assembly 1 and the second eccentric assembly 2. It can be achieved that the eccentric mass moments of the first eccentric assembly 1 and the second eccentric assembly 2 are 0 during the starting and stopping of the vibratory hammer. When the frequency reaches a certain value, by changing the rotational speeds of the first motor 4 and the second motor 5, the change of the eccentric mass moment is realized, and resonance-free starting and stopping are achieved, thus effectively avoiding the resonance of surrounding buildings. At the same time, stepless adjustment of the frequency and eccentric mass moment of the vibratory hammer can be realized according to different geological conditions to meet the adaptability of the working conditions.

[0071] In addition, the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vibrating hammer, characterized in that, it comprises: a first eccentric assembly (1) and a second eccentric assembly (2), the first eccentric assembly (1) and the second eccentric assembly (2) being in transmission connection; an adjustment assembly (3), in transmission connection with the first eccentric assembly (1) or the second eccentric assembly (2) to adjust the phase difference between the first eccentric assembly (1) and the second eccentric assembly (2); an actuating element, including a first transmission mechanism and a second transmission mechanism, the first transmission mechanism being connected to the first eccentric assembly (1) or the second eccentric assembly (2) for providing a driving force for the first eccentric assembly (1) or the second eccentric assembly (2), and the second transmission mechanism being connected to the adjustment assembly (3) for providing a driving force for the adjustment assembly (3); the first eccentric assembly (1) includes a first shaft (11), a first fixed eccentric unit (12) and a first adjustable eccentric unit (13); the first shaft (11) sequentially passes through the first fixed eccentric unit (12) and the first adjustable eccentric unit (13), and the first fixed eccentric unit (12) and the first adjustable eccentric unit (13) are spaced apart; the second eccentric assembly (2) includes a second shaft (21), a second fixed eccentric unit (22) and a second adjustable eccentric unit (23); the second shaft (21) sequentially passes through the second fixed eccentric unit (22) and the second adjustable eccentric unit (23), and the second fixed eccentric unit (22) and the second adjustable eccentric unit (23) are spaced apart, the first shaft (11) and the second shaft (21) are arranged in parallel, the first fixed eccentric unit (12) and the second fixed eccentric unit (22) are in transmission connection, and the first adjustable eccentric unit (13) and the second adjustable eccentric unit (23) are in transmission connection; the adjustment assembly (3) includes a third shaft (31) and an adjustment unit (32) provided on the third shaft (31), the second transmission mechanism is connected to the third shaft (31), and the adjustment unit (32) is in transmission connection with the first adjustable eccentric unit (13) or the second adjustable eccentric unit (23); by controlling the first shaft (11) and the third shaft (31) to rotate at different speeds through the first transmission mechanism and the second transmission mechanism, the phase difference of the first eccentric assembly (1) and the phase difference of the second eccentric assembly (2) can be adjusted.

2. The vibrating hammer according to claim 1, characterized in that, the first fixed eccentric unit (12) includes a first fixed gear (121) and a first fixed eccentric block (122), the first fixed eccentric block (122) is fixedly connected to the first fixed gear (121), the second fixed eccentric unit (22) includes a second fixed gear (221) and a second fixed eccentric block (222), the second fixed eccentric block (222) is fixedly connected to the second fixed gear (221), and the first fixed gear (121) and the second fixed gear (221) are meshed.

3. The vibrating hammer according to claim 2, characterized in that, the first adjustable eccentric unit (13) includes a first bearing (131), a first adjustable gear (132) and a first adjustable eccentric block (133), the first adjustable gear (132) and the first adjustable eccentric block (133) are fixedly connected, the first bearing (131) is sleeved on the first shaft (11), the first adjustable gear (132) and the first adjustable eccentric block (133) are both sleeved on the outer ring of the first bearing (131), the second adjustable eccentric unit (23) includes a second bearing (231), a second adjustable gear (232) and a second adjustable eccentric block (233), the second adjustable gear (232) and the second adjustable eccentric block (233) are fixedly connected, the second bearing (231) is sleeved on the second shaft (21), the second adjustable gear (232) and the second adjustable eccentric block (233) are both sleeved on the outer ring of the second bearing (231), and the first adjustable gear (132) meshes with the second adjustable gear (232).

4. The vibrating hammer according to claim 3, characterized in that, the first adjustable eccentric unit (13) further includes a first pressing plate (134), the second adjustable eccentric unit (23) includes a second pressing plate (234), the first pressing plate (134) is sleeved on the first shaft (11) and fixedly connected to the first adjustable eccentric block (133), and the second pressing plate (234) is sleeved on the second shaft (21) and fixedly connected to the second adjustable eccentric block (233).

5. The vibrating hammer according to claim 3, characterized in that, the adjusting unit (32) includes an adjusting gear, and the adjusting gear meshes with the first adjustable gear (132) or the second adjustable gear (232).

6. The vibrating hammer according to claim 3, characterized in that, the vibrating hammer further includes an angle sensor and a speed sensor, and the angle sensor and the speed sensor are both provided on the first shaft (11) and the third shaft (31) or the second shaft (21) and the third shaft (31).

7. The vibrating hammer according to claim 1, characterized in that, it further includes a hydraulic pump (6), a main valve (7) and two proportional speed control valve groups (8), the oil outlet of the hydraulic pump (6) is connected to the oil inlet of the main valve (7), the oil outlet of the main valve (7) is respectively connected to the oil inlets of the two proportional speed control valve groups (8), and in the two proportional speed control valve groups (8), one is connected to the first transmission mechanism and the other is connected to the second transmission mechanism.

8. The vibrating hammer according to claim 7, characterized in that, The proportional speed control valve group (8) includes a reversing valve (81), a first signal oil path a, a second signal oil path b, a differential pressure feedback valve (82), and an adjustable throttle valve (83). The main valve (7) is communicated with the oil inlet of the differential pressure feedback valve (82). The oil outlet of the differential pressure feedback valve (82) is communicated with the oil inlet of the adjustable throttle valve (83). The oil inlet of the reversing valve (81) is communicated with the oil outlet of the adjustable throttle valve (83). The oil outlet of the reversing valve (81) is connected to or cut off from the fuel tank. The two ends of the first signal oil path a are respectively connected to the first end of the differential pressure feedback valve (82) and the oil inlet of the adjustable throttle valve (83). The two ends of the second signal oil path b are respectively connected to the second end of the differential pressure feedback valve (82) and the oil outlet of the adjustable throttle valve (83). A spring is arranged at the second end.

9. A construction machine, comprising the vibratory hammer according to any one of claims 1-8.

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