Center of gravity adjustment device, counterweight device and operating machinery

Abstract

This invention relates to the field of engineering machinery technology, providing a center of gravity adjustment device, a counterweight device, and a working machine. The center of gravity adjustment device includes a fixed base, a rotating base, an eccentric counterweight, a first drive mechanism, and a second drive mechanism. The fixed base is connected to the vehicle body; the rotating base is rotatably connected to the fixed base, with its rotation axis being a first axis; the eccentric counterweight is rotatably connected to the rotating base, with its rotation axis being a second axis. Both the first and second axes are perpendicular to the vehicle body's bearing surface, and there is a gap between the second axis and the first axis. There is also a gap between the center of gravity of the eccentric counterweight and the second axis. The first drive mechanism drives the rotating base to rotate relative to the fixed base; the second drive mechanism drives the eccentric counterweight to rotate relative to the rotating base. This configuration, combined with the rotation of the rotating base and the eccentric counterweight, increases the adjustment range of the eccentric counterweight's center of gravity, solving the problem in existing technologies where the center of gravity of the counterweight can only be adjusted along the longitudinal direction of the vehicle body.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a center of gravity adjustment device, a counterweight device, and a working machine. Background Technology

[0002] With the diversified application and development of construction machinery, the structure of construction machinery is becoming more refined, user-friendly, and convenient to operate and maintain. For example, taking excavators as an example, currently, excavators are generally equipped with a counterweight at the rear. This counterweight can balance the torque generated when the bucket is digging, thereby preventing the excavator from tipping over. However, the mass and position of the counterweight are fixed, and the counterweight's ability to balance the excavator is limited.

[0003] While some existing excavators can adjust the position of the counterweight in the front-to-back direction, they cannot adjust the position of the counterweight diagonally upwards or left-to-right in directions such as left-to-front, right-to-front, left-to-rear, and right-to-rear. Therefore, they cannot balance the torque in these directions. Due to the complex driving and operating conditions of excavators, they inevitably need to travel or operate on sloping ground. For example, when the excavator is on sloping ground and the right side of the excavator is higher than the left side in the direction of the slope, the slope of the ground cannot be too steep. Otherwise, the excavator faces a high risk of tipping over, limiting its operating conditions.

[0004] Therefore, how to solve the problem that the center of gravity of the counterweight in the prior art can only be adjusted along the front and rear direction of the vehicle body has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a center of gravity adjustment device, a counterweight device, and a working machine to solve the defect in the prior art that the center of gravity of the counterweight can only be adjusted along the front and rear directions of the vehicle body.

[0006] This invention provides a center of gravity position adjustment device, comprising:

[0007] Mounting bracket, used for connection to the vehicle body;

[0008] A rotating seat is rotatably connected to the fixed seat, and the axis of rotation is a first axis, which is perpendicular to the bearing surface of the vehicle body;

[0009] An eccentric counterweight is rotatably connected to the rotating seat, with the rotation axis being a second axis. The second axis is perpendicular to the bearing surface of the vehicle body, and there is a gap between the second axis and the first axis. There is also a gap between the center of gravity of the eccentric counterweight and the second axis.

[0010] The first driving mechanism is configured to drive the rotating seat to rotate relative to the fixed seat;

[0011] The second drive mechanism is configured to drive the eccentric counterweight to rotate relative to the rotating base.

[0012] According to the present invention, a center of gravity position adjustment device is provided, wherein the interior of the rotating seat has a receiving space, the eccentric counterweight is disposed inside the rotating seat, and both ends of the eccentric counterweight along the second axis are rotatably connected to the rotating seat.

[0013] According to the present invention, the center of gravity position adjustment device has a fan-shaped cross-section of the eccentric counterweight, and the cross-section is perpendicular to the second axis.

[0014] According to a center of gravity adjustment device provided by the present invention, a caster wheel is provided on the side of the eccentric counterweight facing the rotating seat, and the caster wheel is in contact with the rotating seat.

[0015] According to the present invention, the center of gravity position adjustment device includes a swivel wheel, which is a ball wheel.

[0016] According to a center of gravity position adjustment device provided by the present invention, the first driving mechanism and / or the second driving mechanism include a belt drive assembly and a driving member, wherein the driving member is configured to drive the belt drive assembly to operate.

[0017] The center of gravity position adjustment device provided by the present invention further includes:

[0018] The detection mechanism is configured to detect the magnitude and direction of the load on the vehicle body;

[0019] The control system is electrically connected to the first drive mechanism, the second drive mechanism, and the detection mechanism. The control system is configured to acquire the magnitude and direction of the load and to control the operation of the first drive mechanism and the second drive mechanism.

[0020] According to a center-of-gravity adjustment device provided by the present invention, the vehicle body is rotatably mounted on a traveling device, the rotation axis of the vehicle body relative to the traveling device is a third axis, the third axis is perpendicular to the bearing surface of the vehicle body, and the first axis, the second axis, and the third axis are distributed at intervals. The detection mechanism includes:

[0021] A pressure sensor is configured to detect the pressure between the vehicle body and the walking device. The pressure sensor is disposed between the vehicle body and the walking device. Multiple pressure sensors are disposed at intervals around the third axis, and each pressure sensor is electrically connected to the control system.

[0022] The present invention also provides a counterweight device, including the above-described center of gravity position adjustment device.

[0023] The present invention also provides a working machine, including the above-mentioned center of gravity position adjustment device, or including the above-mentioned counterweight device.

[0024] The present invention provides a center of gravity adjustment device, comprising a fixed base, a rotating base, an eccentric counterweight, a first driving mechanism, and a second driving mechanism. The fixed base is connected to the vehicle body, and the rotating base is rotatably connected to the fixed base, with the rotation axis being a first axis perpendicular to the vehicle body's bearing surface. The first driving mechanism drives the rotating base to rotate relative to the fixed base. The eccentric counterweight is rotatably connected to the rotating base, with the rotation axis being a second axis perpendicular to the vehicle body's bearing surface. The second driving mechanism drives the eccentric counterweight to rotate relative to the rotating base. There is a gap between the center of gravity of the eccentric counterweight and the second axis. When the eccentric counterweight rotates relative to the rotating base around the second axis, the relative position of the center of gravity of the eccentric counterweight and the rotating base changes. The second axis is parallel to the first axis, and there is a gap between the second axis and the first axis. When the rotating base rotates relative to the fixed base, the entire eccentric counterweight and the second axis both rotate relative to the fixed base around the first axis, and the position of the eccentric counterweight relative to the rotation axis of the rotating base changes. With this configuration, combining the rotation of the eccentric counterweight relative to the rotating seat and the rotation of the rotating seat relative to the fixed seat, the center of gravity of the eccentric counterweight can not only change in the front-rear direction of the vehicle body, but also in the diagonal upward and left-right directions such as the left front, right front, left rear, and right rear of the vehicle body. This allows the center of gravity adjustment device to balance torque in both the front-rear direction and the diagonal upward and left-right directions such as the left front, right front, left rear, and right rear. This solves the problem in the prior art that the center of gravity of the counterweight can only be adjusted in the front-rear direction of the vehicle body, which is beneficial to improving the excavator's adaptability to working conditions.

[0025] Furthermore, the counterweight device provided by the present invention also possesses the various advantages described above because it has the center of gravity position adjustment device as described above.

[0026] Furthermore, the working machinery provided by the present invention also possesses the various advantages described above because it has the center of gravity adjustment device or counterweight device as described above. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the center of gravity position adjustment device provided by the present invention when it is installed on an excavator;

[0029] Figure 2 This is a schematic diagram of the structure of the center of gravity position adjustment device provided by the present invention;

[0030] Figure 3 This is a top view of the center of gravity position adjustment device provided by the present invention;

[0031] Figure 4 This is a schematic diagram showing the connection of the detection mechanism, control system, first drive mechanism, and second drive mechanism provided by the present invention.

[0032] Figure label:

[0033] 1. Fixed seat; 2. Vehicle body; 3. Rotating seat; 4. Eccentric counterweight; 5. Working device; 6. Second slewing bearing; 7. Casters; 8. Traveling device; 9. Pressure sensor; 10. First slewing bearing; 11. Bearing; 12. First belt drive assembly; 13. First drive component; 14. Second belt drive assembly; 15. Second drive component; 16. Microprocessor; 17. First controller; 18. Second controller; 19. Fixed counterweight. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "left front," "right front," "left rear," "right rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and 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 embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0037] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] The following combination Figures 1 to 4 The present invention describes a center of gravity position adjustment device.

[0040] like Figures 1 to 4 As shown, the center of gravity position adjustment device provided in this embodiment of the invention includes a fixed base 1, a rotating base 3, an eccentric counterweight 4, a first driving mechanism, and a second driving mechanism.

[0041] Specifically, the mounting base 1 is used to connect with the vehicle body 2. When the vehicle body 2 is the upper frame of the excavator, the mounting base 1 can be fixedly installed on the upper frame, and the mounting base 1 is located behind the cab.

[0042] The rotating seat 3 is rotatably connected to the fixed seat 1, and the axis of rotation is the first axis, which is perpendicular to the bearing surface of the vehicle body 2. The first drive mechanism is used to drive the rotating seat 3 to rotate relative to the fixed seat 1.

[0043] Specifically, the first slewing bearing 10 can be used to achieve the rotatable connection between the rotating seat 3 and the fixed seat 1. The inner ring of the first slewing bearing 10 is fixedly connected to the fixed seat 1, and the outer ring of the first slewing bearing 10 is fixedly connected to the rotating seat 3.

[0044] The eccentric counterweight 4 is rotatably connected to the rotating base 3, with the rotation axis being the second axis, which is perpendicular to the bearing surface of the vehicle body 2. The second drive mechanism is used to drive the eccentric counterweight 4 to rotate relative to the rotating base 3.

[0045] There is a gap between the center of gravity of the eccentric counterweight 4 and the second axis. When the eccentric counterweight 4 rotates around the second axis relative to the rotating seat 3, the relative position of the center of gravity of the eccentric counterweight 4 and the rotating seat 3 will change.

[0046] The second axis is parallel to the first axis, and there is a gap between the second axis and the first axis. When the rotating seat 3 rotates relative to the fixed seat 1, the eccentric counterweight 4 as a whole and the second axis will both rotate around the first axis relative to the fixed seat 1. The position of the eccentric counterweight 4 relative to the rotation axis of the rotating seat 3, that is, the second axis, relative to the fixed seat 1 changes.

[0047] With this configuration, combined with the rotation of the eccentric counterweight 4 relative to the rotating seat 3 and the rotation of the rotating seat 3 relative to the fixed seat 1, the center of gravity position of the eccentric counterweight 4 can not only change in the front-rear direction of the vehicle body 2, but also in the left front, right front, left rear, right rear and other diagonal upward and left-right directions. This allows the center of gravity position adjustment device to balance the torque in both the front-rear direction and the left front, right front, left rear, right rear and other diagonal upward and left-right directions, solving the problem that the center of gravity position of the counterweight in the prior art can only be adjusted in the front-rear direction of the vehicle body 2, which is beneficial to improving the excavator's adaptability to working conditions.

[0048] It should be noted that the aforementioned left-front direction refers to the direction between the front and left sides, and the aforementioned right-front direction refers to the direction between the front and right sides, but the angle between them and the front is not limited. Similarly, the aforementioned left-rear direction refers to the direction between the rear and left sides, and the aforementioned right-rear direction refers to the direction between the rear and right sides, but the angle between them and the rear is not limited.

[0049] The eccentric counterweight 4 is made of a material with a high density, such as steel. Under the premise that the mass requirement of the eccentric counterweight 4 is the same, it is beneficial to reduce the volume of the eccentric counterweight 4.

[0050] In some embodiments, the distance between the eccentric counterweight 4 and the second axis can be made smaller than the distance between the first axis and the second axis. In this case, the center of gravity of the eccentric counterweight 4 can be adjusted to any position within a certain annular area.

[0051] In other embodiments, the distance between the eccentric weight 4 and the second axis can be greater than or equal to the distance between the first axis and the second axis. In this case, the center of gravity of the eccentric weight 4 can be adjusted to any position within a certain circular area, such as... Figure 3 The circle referred to by A in the diagram.

[0052] In this embodiment of the invention, the rotating seat 3 has an internal accommodating space, and the eccentric counterweight 4 is disposed inside the rotating seat 3. Specifically, the rotating seat 3 can be configured as a box-type structure or a cylindrical structure, and the accommodating space has not only side walls, but also a top wall and a bottom wall.

[0053] By rotatably connecting both ends of the eccentric counterweight 4 along the second axis to the rotating seat 3, specifically, one end of the eccentric counterweight 4 can be rotatably connected to the top wall of the accommodating space, and the other end of the eccentric counterweight 4 can be rotatably connected to the bottom wall of the accommodating space, thereby improving the stability of the eccentric counterweight 4.

[0054] When the eccentric counterweight 4 is rotatably connected to the rotating seat 3, bearings 11 can be installed at both ends of the eccentric counterweight 4. The bearings 11 can support the rotation of the eccentric counterweight 4 and reduce the friction during the rotation of the eccentric counterweight 4.

[0055] At this point, the second drive mechanism can be set at the end of the rotating seat 3 away from the fixed seat 1.

[0056] In a further embodiment, to reduce the resistance when the eccentric counterweight 4 rotates relative to the rotating seat 3, a caster wheel 7 can be provided on the side of the eccentric counterweight 4 facing the rotating seat 3, and the caster wheel 7 contacts the rotating seat 3. When the eccentric counterweight 4 rotates relative to the rotating seat 3, the caster wheel 7 moves together with the eccentric counterweight 4, and the friction between the caster wheel 7 and the rotating seat 3 is rolling friction, which is relatively small.

[0057] The casters 7 can be installed only between the eccentric counterweight 4 and the top wall of the receiving space, or only between the eccentric counterweight 4 and the bottom wall of the receiving space, or both between the eccentric counterweight 4 and the top wall of the receiving space and between the eccentric counterweight 4 and the bottom wall of the receiving space.

[0058] It should be noted that the casters 7, which are set between the eccentric counterweight 4 and the bottom wall of the accommodating space, not only reduce the resistance when the eccentric counterweight 4 rotates, but also provide support for the eccentric counterweight 4, thereby improving the stability of the eccentric counterweight 4.

[0059] Specifically, two omnidirectional wheels 7 can be set, and the two omnidirectional wheels 7 are distributed at intervals around the second axis.

[0060] In a specific embodiment, a swivel wheel is selected as the aforementioned swivel wheel 7. Swivel wheels have the advantage of high load-bearing capacity, which helps extend the service life of the center-of-gravity adjustment device.

[0061] The first and second drive mechanisms may be configured as gear drives, chain drives, or belt drives, but are not limited to such configurations.

[0062] In this embodiment, both the first drive mechanism and the second drive mechanism are configured as rotating structures. The belt drive uses a flexible belt for power transmission, which is elastic, can reduce impact and vibration loads, and operate smoothly, thus reducing the impact on the vehicle body 2.

[0063] Specifically, the first drive mechanism includes a first belt drive assembly 12 and a first drive member 13, with the first belt drive assembly 12 disposed between the rotating seat 3 and the fixed seat 1.

[0064] The first belt drive assembly 12 includes a first driving pulley, a first driven pulley, and a first drive belt. The first driving pulley is rotatably connected to the fixed base 1, the first driven pulley is rotatably connected to the fixed base 1 and fixedly connected to the rotating base 3, and the first drive belt is tensioned on the first driving pulley and the first driven pulley.

[0065] The first driving component 13 is disposed on the fixed base 1 and is drivenly connected to the first drive pulley. Specifically, a motor can be selected as the first driving component 13, and the motor housing is fixed on the fixed base 1 so that the output shaft of the motor is drivenly connected to the first drive pulley.

[0066] The motor is controlled to rotate, and the rotating seat 3 can be driven to rotate relative to the fixed seat 1 through the first belt drive assembly 12.

[0067] Accordingly, the second drive mechanism includes a second belt drive assembly 14 and a second drive member 15, with the second belt drive assembly 14 disposed between the rotating seat 3 and the eccentric counterweight 4.

[0068] The second belt drive assembly 14 includes a second driving pulley, a second driven pulley, and a second drive belt. The second driving pulley is rotatably connected to the rotating seat 3, the second driven pulley is rotatably connected to the rotating seat 3, and the second driven pulley is fixedly connected to the eccentric counterweight 4. The second drive belt is tensioned on the second driving pulley and the second driven pulley.

[0069] The second driving component 15 is disposed on the rotating base 3 and is connected to the second driving pulley via a transmission. Specifically, a motor can be selected as the second driving component 15, and the motor housing is fixed on the rotating base 3 so that the output shaft of the motor is connected to the second driving pulley via a transmission.

[0070] The motor is controlled to rotate, and the eccentric counterweight 4 can be driven to rotate relative to the rotating seat 3 through the second belt drive assembly 14.

[0071] The first belt drive assembly 12 and the second belt drive assembly 14 can be configured as synchronous belt drive assemblies. Synchronous belt drive assemblies have the advantages of high transmission efficiency and accurate transmission ratio, which can prevent the drive belt from slipping and help improve the adjustment accuracy of the center of gravity position of the eccentric counterweight 4.

[0072] In this embodiment of the invention, the cross-sectional shape of the eccentric counterweight 4 is set to a sector shape, and the cross-section is perpendicular to the second axis. That is, the eccentric counterweight 4 can be set as a sector-shaped column.

[0073] In this embodiment of the invention, the center of gravity position adjustment device further includes a detection mechanism and a control system, and the first driving mechanism, the second driving mechanism and the detection mechanism are all electrically connected to the control system.

[0074] The detection mechanism is used to detect the magnitude and direction of the load on the vehicle body 2. The control system can obtain the magnitude and direction of the load, and determine the target position of the center of gravity of the eccentric counterweight 4 based on the obtained magnitude and direction of the load, and control the operation of the first drive mechanism and the second drive mechanism as needed.

[0075] With this setup, the load state of the vehicle body 2 can be obtained by the detection mechanism, and the rotation of the eccentric counterweight 4 can be controlled according to the load state of the vehicle body 2. This can automatically balance the torque on the excavator vehicle body 2, improve the stability of the excavator, and reduce the possibility of the excavator overturning.

[0076] In this embodiment, the detection mechanism includes a pressure sensor 9, which is disposed between the vehicle body 2 and the walking device 8. The pressure sensor 9 is used to detect the pressure between the vehicle body 2 and the walking device 8.

[0077] For construction machinery such as excavators, cranes and rotary drilling rigs, the vehicle body 2 is rotatably mounted on the crawler device or other traveling device 8. The axis of rotation of the vehicle body 2 relative to the traveling device 8 is the third axis, which is perpendicular to the bearing surface of the vehicle body 2. The first axis, the second axis and the third axis are distributed at intervals.

[0078] Specifically, the vehicle body 2 is connected to the traveling device 8 via the second slewing bearing 6. Alternatively, the pressure sensor 9 can be placed between the inner and outer rings of the second slewing bearing 6, so that the pressure sensor 9 can detect the load along the direction perpendicular to the bearing surface of the vehicle body 2.

[0079] Multiple pressure sensors 9 are provided, distributed at intervals around the third axis, that is, the pressure sensors 9 are distributed circumferentially along the second slewing bearing 6. Each pressure sensor 9 is electrically connected to the control system. The multiple pressure sensors 9 measure the load at each location, and then the multiple loads are combined to determine the total load borne by the vehicle body 2. Increasing the number of pressure sensors 9 helps to improve the accuracy of the determined total load.

[0080] In this embodiment, four pressure sensors 9 are provided, evenly distributed at intervals along the circumference of the second slewing bearing 6. The four pressure sensors 9 are designated as a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor. The line connecting the first and third pressure sensors runs along the longitudinal direction of the vehicle body 2, with the first pressure sensor located in front of the third pressure sensor. The line connecting the second and fourth pressure sensors runs along the lateral direction of the vehicle body 2, with the second pressure sensor located to the left of the fourth pressure sensor. The aforementioned first, second, third, and fourth pressure sensors work together to accurately collect the load state and changes of the vehicle body 2.

[0081] Based on the pressure detected by the first and third pressure sensors, the magnitude and direction of the load on the vehicle body 2 in the front-rear direction can be determined; based on the pressure detected by the second and fourth pressure sensors, the magnitude and direction of the load on the vehicle body 2 in the left-right direction can be determined; then, by combining the loads on the vehicle body 2 in the front-rear direction and the loads on the vehicle body 2 in the left-right direction, the magnitude and direction of the overall load on the vehicle body 2 can be determined.

[0082] Based on the magnitude and direction of the total load on the vehicle body 2, the torque generated by the total load on the vehicle body 2 can be determined. By adjusting the position of the center of gravity of the eccentric counterweight 4, the eccentric counterweight 4 can generate a torque that is appropriate in magnitude and opposite in direction.

[0083] The control system includes a microprocessor 16, a first controller 17, and a second controller 18. The pressure sensor 9 is electrically connected to the microprocessor 16. The microprocessor 16 can acquire the detection results from the pressure sensor 9 and perform the aforementioned analysis and calculations based on the detection results. Both the first controller 17 and the second controller 18 are electrically connected to the microprocessor 16. The first controller 17 is electrically connected to the first drive mechanism, and the second controller 18 is electrically connected to the second drive mechanism. Based on the analysis and calculation results from the microprocessor 16, the first controller 17 and the second controller 18 respectively control the operation of the first drive mechanism and the second drive mechanism.

[0084] In addition, the embodiments of the present invention can also alleviate the impact load on the vehicle body 2. For example, when the excavator is in driving or working condition, the vehicle body 2 will be subjected to impact load due to bumps, bucket digging, or the working device 5 such as the bucket pushing or pulling objects laterally. The direction of the impact load on the vehicle body 2 can be determined according to the detection results of each pressure sensor 9. By controlling the eccentric counterweight 4 and / or the rotating seat 3 to rotate in the opposite direction, the impact load can be alleviated and the fatigue life of the parts on the vehicle body 2 can be extended.

[0085] On the other hand, embodiments of the present invention also provide a counterweight device, including the center of gravity position adjustment device provided in any of the above embodiments. The center of gravity position adjustment device provided in the above embodiments has a large adjustment range and can adjust the center of gravity position in the left and right directions as well as diagonally upwards in the left-right, left-front, right-front, left-rear, and right-rear directions. Therefore, the counterweight device in this embodiment also has the advantage of a large adjustment range of the center of gravity position and can also adjust the center of gravity position in the left and right directions as well as diagonally upwards in the left-right, left-front, right-front, left-rear, and right-rear directions. The derivation process of the beneficial effects of the counterweight device in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the above-described center of gravity position adjustment device, so it will not be repeated here.

[0086] In this embodiment, the counterweight device further includes a fixed counterweight 19, on which an installation space is formed, and the center of gravity position adjustment device is disposed within the installation space. Specifically, the first axis of the center of gravity position adjustment device, the center of gravity of the fixed counterweight 19, and the central axis of the second slewing bearing 6 can be located in the same plane.

[0087] In another aspect, embodiments of the present invention also provide a working machine, including the center of gravity position adjustment device or counterweight device provided in any of the above embodiments. It possesses all the advantages of the aforementioned center of gravity position adjustment device or counterweight device, which will not be repeated here. The derivation process of the beneficial effects of the working machine in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the aforementioned center of gravity position adjustment device or counterweight device, and therefore will not be repeated here.

[0088] In the embodiments of the present invention, the type of operating machinery is not limited. For example, the operating machinery can be an excavator, a crane, a rotary drilling rig, etc. In other words, as long as the operating machinery can use the center of gravity adjustment device in the embodiments of the present invention, it is acceptable.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A center of gravity position adjustment device, characterized in that, include: Mounting bracket, used for connection to the vehicle body; A rotating seat is rotatably connected to the fixed seat, and the axis of rotation is a first axis, which is perpendicular to the bearing surface of the vehicle body; An eccentric counterweight is rotatably connected to the rotating seat, with the rotation axis being a second axis. The second axis is perpendicular to the bearing surface of the vehicle body, and there is a gap between the second axis and the first axis. There is also a gap between the center of gravity of the eccentric counterweight and the second axis. The first driving mechanism is configured to drive the rotating seat to rotate relative to the fixed seat; The second drive mechanism is configured to drive the eccentric counterweight to rotate relative to the rotating base.

2. The center of gravity position adjustment device according to claim 1, characterized in that, The rotating base has an internal accommodating space, and the eccentric counterweight is disposed inside the rotating base. Both ends of the eccentric counterweight along the second axis are rotatably connected to the rotating base.

3. The center of gravity position adjustment device according to any one of claims 1-2, characterized in that, The cross-sectional shape of the eccentric counterweight is fan-shaped, and the cross-section is perpendicular to the second axis.

4. The center of gravity position adjustment device according to any one of claims 1-2, characterized in that, The eccentric counterweight is provided with a caster wheel on the side facing the rotating base, and the caster wheel is in contact with the rotating base.

5. The center of gravity position adjustment device according to claim 4, characterized in that, The omnidirectional wheel is a omnidirectional ball wheel.

6. The center of gravity position adjustment device according to claim 1, characterized in that, The first drive mechanism and / or the second drive mechanism include a belt drive assembly and a drive member, wherein the drive member is configured to drive the belt drive assembly to operate.

7. The center of gravity position adjustment device according to claim 1, characterized in that, Also includes: The detection mechanism is configured to detect the magnitude and direction of the load on the vehicle body; The control system is electrically connected to the first drive mechanism, the second drive mechanism, and the detection mechanism. The control system is configured to acquire the magnitude and direction of the load and to control the operation of the first drive mechanism and the second drive mechanism.

8. The center of gravity position adjustment device according to claim 7, characterized in that, The vehicle body is rotatably mounted on the traveling device. The rotation axis of the vehicle body relative to the traveling device is a third axis, which is perpendicular to the bearing surface of the vehicle body. The first axis, the second axis, and the third axis are distributed at intervals. The detection mechanism includes: A pressure sensor is configured to detect the pressure between the vehicle body and the walking device. The pressure sensor is disposed between the vehicle body and the walking device. Multiple pressure sensors are disposed at intervals around the third axis, and each pressure sensor is electrically connected to the control system.

9. A counterweight device, characterized in that, Includes the center of gravity position adjustment device as described in any one of claims 1 to 8.

10. A type of operating machinery, characterized in that, It includes the center of gravity position adjustment device as described in any one of claims 1 to 8, or the counterweight device as described in claim 9.

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