Construction machine, load calculation system for construction machine

Abstract

A construction machine having a load calculation function, the construction machine having a first mode and a second mode, the precision of the load calculation function in the first mode being different from the precision of the load calculation function in the second mode.

Description

Technical Field

[0001] This invention relates to a construction machine and a load calculation system for construction machinery. Background Technology

[0002] Previously, there was a type of construction machinery that, after adsorbing and lifting iron filings, etc., and loading them onto the cargo box of a dump truck, adjusted the cumulative weight of the loaded iron filings, etc., to a target weight (the maximum loading weight of the dump truck).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2020 / 022454 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the aforementioned prior art, when calculating the weight of the object being lifted, the posture or movement of the construction machinery needs to meet pre-set limitations, which may lead to a decrease in work efficiency.

[0008] The purpose of publicly available technology is to improve operational efficiency.

[0009] Methods for solving problems

[0010] The construction machinery involved in the embodiments of the present invention has a load calculation function. The construction machinery has a first mode and a second mode. The accuracy of the load calculation function in the first mode is different from the accuracy of the load calculation function in the second mode.

[0011] The load calculation system for construction machinery involved in the embodiments of the present invention has a first mode and a second mode. The accuracy of the load calculation function in the first mode is different from the accuracy of the load calculation function in the second mode.

[0012] Invention Effects

[0013] It can improve work efficiency. Attached Figure Description

[0014] Figure 1 This is a side view of the construction machinery involved in the embodiments of the present invention.

[0015] Figure 2 It means that it is carried on Figure 1 The diagram shows a structural example of the drive system of the construction machinery.

[0016] Figure 3 This is a diagram illustrating the structure of the main screen.

[0017] Figure 4 The first image is an example of a loading animation.

[0018] Figure 5 The second image is an example of a loading animation.

[0019] Figure 6 This is a diagram illustrating the effects of this embodiment. Detailed Implementation

[0020] Figure 1 This is a side view of the construction machinery 100 according to an embodiment of the present invention. An upper rotating body 3 is mounted on the lower traveling body 1 of the construction machinery 100 via a rotating mechanism 2. A boom 4 is mounted on the upper rotating body 3. A stick 5 is mounted at the front end of the boom 4, and a lifting magnet 6, serving as an end-connection accessory, is mounted at the front end of the stick 5.

[0021] The boom 4 and stick 5 constitute an example of an operating accessory. Furthermore, the boom 4 is driven by the boom cylinder 7, the stick 5 is driven by the stick cylinder 8, and the lifting magnet 6 is driven by the lifting magnet cylinder 9.

[0022] A boom angle sensor S1 is installed on the boom 4, a stick angle sensor S2 is installed on the stick 5, and a lifting magnet angle sensor S3 is installed on the lifting magnet 6. A controller 30, a display device 40, and a display device 50 (for reference) are installed on the upper slewing body 3. Figure 2 The camera device 80, the body tilt sensor S4, and the rotational angular velocity sensor S5 are also included. Alternatively, the camera device 80 can be replaced, or an object detection device can be installed on the upper rotating body 3 in addition to the camera device 80.

[0023] In the construction machinery 100 of this embodiment, the controller 30, based on the operation of a switch provided in the operating device 26 (described later), causes the lifting magnet 6 to be in an adsorption state capable of adsorbing objects (magnetic bodies). Furthermore, the controller 30, based on the operation of a switch provided in the operating device 26, causes the lifting magnet 6, which is in the adsorption state, to be in a non-adsorption state (released state). In this embodiment, by using the lifting magnet 6 to adsorb objects and releasing them onto the cargo compartment of a transport vehicle, objects such as iron filings are loaded onto the cargo compartment of the transport vehicle. The transport vehicle in this embodiment includes, for example, a dump truck or a trailer.

[0024] Here, the application scenario of the construction machinery 100 according to this embodiment will be described. In this embodiment, the construction machinery 100 loads objects onto the carriage of a transport vehicle in a loading and storage yard where objects are loaded.

[0025] For transport vehicles to move objects loaded onto their cargo compartments to their destination on roads or other public transportation routes, the weight of the loaded objects must not exceed the maximum load capacity of the transport vehicle. Furthermore, for efficient transport, it is preferable to load the cargo compartment of the transport vehicle up to its maximum load capacity.

[0026] In this situation, once the loading of the cargo into the truck is complete, the transport vehicle is moved to an area equipped with a weighbridge for weighing to measure the weight of the cargo.

[0027] Then, if the loaded weight exceeds the maximum load weight, the transport vehicle returns to the loading and storage area, and the loaded objects are unloaded using the construction machinery 100 before the weighing is repeated. Similarly, if the loaded weight is less than the maximum load weight, the transport vehicle returns to the loading and storage area, and the construction machinery 100 is used to further load the objects before the weighing is repeated.

[0028] Therefore, within the loading and storage yard, the closer the load weight of the objects loaded onto the transport vehicles is to the maximum load weight, the fewer times the transport vehicles need to travel between the loading and storage yard and the area equipped with a weighbridge, which is preferable.

[0029] Therefore, it is required that the loading weight of the construction machinery 100 in the loading and stacking yard for loading objects into the cargo compartment of the transport vehicle is close to the maximum loading weight.

[0030] In particular, when the transport vehicle is a large vehicle, the number of loading operations increases until the cargo compartment of the transport vehicle is full, thus requiring rapid loading operations.

[0031] Therefore, during the loading operation, the construction machinery 100 of this embodiment is equipped with a loading mode where weight calculation conditions are not set when calculating the weight of the lifted object, and an adjustment mode where weight calculation conditions are set when calculating the weight of the lifted object. Here, the accuracy of the load calculation function in the adjustment mode differs from the accuracy of the load calculation function in the loading mode. In other words, the weight calculation conditions in the adjustment mode are different from those in the loading mode.

[0032] Specifically, in loading mode, for example, the controller 30 only needs to calculate the weight of the object adsorbed on the lifting magnet 6 when the time is deemed appropriate, based on the pressure at the bottom of the boom or the posture of the construction machinery 100.

[0033] Furthermore, in the loading mode of this embodiment, no weight calculation conditions are set, but this is not a limitation. In the loading mode, weight calculation conditions can be set as long as they are more lenient than in the adjustment mode. The loading mode only needs to be a mode that can perform the loading operation faster than the adjustment mode.

[0034] Furthermore, in adjustment mode, for example, when the construction machinery 100 meets the weight calculation conditions related to speed or movement, the weight of the object adsorbed to the lifting magnet 6 is calculated based on factors such as the pressure at the bottom of the boom or the posture of the construction machinery 100. The weight calculation conditions related to speed or movement in this embodiment include, for example, any one of the following conditions or any combination thereof: the lifting magnet 6 passing through a region of a specific height; the angle of the lifting magnet 6 being within a range that can be considered horizontal; the boom lifting speed being within a specified range; no stick operation being performed; and the movement of the attachments having stopped.

[0035] In loading mode, no weight calculation conditions are set when calculating the weight of an object, thus allowing for rapid calculation of the object's weight and loading it onto the transport vehicle. In adjustment mode, the object's weight is calculated with weight calculation conditions set, enabling higher accuracy than in loading mode. Here, "relaxed" weight calculation conditions include, for example, fewer weight calculation conditions, relaxed weight calculation conditions, or no weight calculation conditions, or any combination thereof. Relaxed weight calculation conditions could include, for example, expanding the range of boom lifting speeds used as weight calculation conditions, or expanding the range of angles where the lifting magnet 6 can be considered horizontal. Furthermore, in this embodiment, if an action is indicated that the weight calculation conditions are not met when weight calculation conditions are set, an error screen can be displayed on the display device 40. Also, in this embodiment, if an action is indicated that the weight calculation conditions are not met when weight calculation conditions are set, the movement of the attachments can be restricted to meet the weight calculation conditions.

[0036] In this embodiment, by combining these two modes, an effective loading action can be performed.

[0037] Specifically, the construction machinery 100 loads objects onto the transport vehicle in loading mode until the weight of the objects loaded onto the transport vehicle approaches the maximum load weight of the transport vehicle. When the weight of the objects loaded onto the transport vehicle approaches the maximum load weight, the loading mode is switched to adjustment mode for loading.

[0038] In this embodiment, by using two modes, loading can be performed quickly while maintaining the accuracy of the weight calculation of the object loaded onto the transport vehicle, thereby improving work efficiency.

[0039] Furthermore, the loading action in this embodiment is represented by the following actions: using the lifting magnet 6 to attract an object, calculating the weight of the attracted object, and then releasing the attracted object onto the cargo compartment of the transport vehicle. Moreover, the loading count in this embodiment is the number of times the object is attracted and released using the lifting magnet 6. That is, the loading count is the number of times the loading action is performed.

[0040] Furthermore, in the following description, the function of calculating the weight of the object adsorbed to the lifting magnet 6 during the loading operation is sometimes referred to as the load calculation function. Also, in the following description, the adjustment mode is sometimes referred to as the first operation mode (first mode), and the loading mode is sometimes referred to as the second operation mode (second mode). That is, it can be said that the construction machinery 100 of this embodiment has a load calculation function, and the accuracy of the load calculation function in the first operation mode is higher than the accuracy of the load calculation function in the second operation mode.

[0041] In the construction machinery 100 of this embodiment, the boom angle sensor S1 is configured to detect the boom angle, which is the rotation angle of the boom 4 relative to the upper rotating body 3. The boom angle sensor S1 can be, for example, a rotation angle sensor that detects the rotation angle of the boom 4 around the boom foot pin, a cylinder stroke sensor that detects the stroke amount (boom stroke amount) of the boom cylinder 7, or a tilt (acceleration) sensor that detects the tilt angle of the boom 4. It can also be a combination of an acceleration sensor and a gyroscope sensor. The same applies to the stick angle sensor S2, which detects the stick angle (rotation angle of the stick 5 relative to the boom 4), and the lifting magnet angle sensor S3, which detects the rotation angle of the lifting magnet 6 relative to the stick 5.

[0042] The fuselage tilt sensor S4 is configured to detect the tilt (fuselage tilt angle) of the upper rotating body 3. In this embodiment, the fuselage tilt sensor S4 is an acceleration sensor that detects the tilt angle of the upper rotating body 3 relative to the horizontal plane about its front-rear axis and left-right axis. The front-rear axis and left-right axis of the upper rotating body 3 are, for example, orthogonal to each other and pass through a mechanical center point, which is a point on the rotation axis of the construction machinery 100.

[0043] The rotational angular velocity sensor S5 is configured to detect the rotational angular velocity of the upper rotating body 3. In this embodiment, the rotational angular velocity sensor S5 is a gyroscope sensor. The rotational angular velocity sensor S5 can also be a rotary transformer or a rotary encoder, etc.

[0044] The camera device 80 is configured to film the area surrounding the construction machinery 100. The camera device 80 may be, for example, a monocular camera, a stereo camera, a distance imaging camera, an infrared camera, or a LiDAR, etc. Figure 1 In this example, the camera device 80 includes a rear camera 80B mounted on the rear end of the upper surface of the upper rotating body 3, a left camera 80L mounted on the left end of the upper surface of the upper rotating body 3, and a right camera 80R mounted on the right end of the upper surface of the upper rotating body 3. Figure 1 (Not shown in the image).

[0045] The object detection device is configured to detect objects present around the construction machinery 100. The object detection device includes a rear sensor monitoring the space behind the construction machinery 100, a left sensor monitoring the space to the left of the construction machinery 100, and a right sensor monitoring the space to the right of the construction machinery 100. The object detection device may also include a front sensor monitoring the space in front of the construction machinery 100. The rear sensor, left sensor, and right sensor are, for example, LiDAR, millimeter-wave radar, or stereo camera.

[0046] When using the output of the camera device 80 to detect objects, the controller 30 detects objects using known image recognition techniques, for example, after performing various image processing operations on the images captured by the camera device 80. Alternatively, the camera device 80 may include a front-facing camera that captures the space in front of the construction machinery 100. Furthermore, in this embodiment, a perimeter monitoring device is provided to monitor the area surrounding the excavator 100, and the perimeter monitoring device includes the camera device 80 and an object detection device.

[0047] Pressure sensors S6a and S6b, and a boom cylinder stroke sensor S7 can be installed on the boom cylinder 7. Pressure sensors S6c and S6d, and a boom cylinder stroke sensor S8 can be installed on the stick cylinder 8. Pressure sensors S6e and S6f, and a lifting magnet cylinder stroke sensor S9 can be installed on the lifting magnet cylinder 9.

[0048] Pressure sensor S6a detects the pressure in the rod-side oil chamber of boom cylinder 7, and pressure sensor S6b detects the pressure in the bottom-side oil chamber of boom cylinder 7 (hereinafter referred to as "boom bottom pressure"). Pressure sensor S6c detects the pressure in the rod-side oil chamber of stick cylinder 8, and pressure sensor S6d detects the pressure in the bottom-side oil chamber of stick cylinder 8. Pressure sensor S6e detects the pressure in the rod-side oil chamber of lifting magnet cylinder 9, and pressure sensor S6f detects the pressure in the bottom-side oil chamber of lifting magnet cylinder 9.

[0049] The upper rotating body 3 is equipped with a driver's cab 10, which serves as the driver's cabin, and is also equipped with a power source such as an engine 11.

[0050] Figure 2 This is a diagram illustrating a structural example of the drive system mounted on construction machinery 100. Figure 2 In the diagram, mechanical power transmission lines are represented by double lines, working oil lines by thick solid lines, pilot lines by dashed lines, electrical control lines by single-dot dashed lines, and electric drive lines by thick dotted lines.

[0051] The drive system of the construction machinery 100 mainly consists of an engine 11, a main pump 14, a hydraulic pump 14G, a pilot pump 15, a control valve unit 17, an operating device 26, a controller 30, and an engine control device 74.

[0052] Engine 11 is the power source for construction machinery 100, for example, a diesel engine that operates at a specified speed. The output shaft of engine 11 is connected to the input shafts of alternator 11a, main pump 14, hydraulic pump 14G, and pilot pump 15, respectively.

[0053] The main pump 14 supplies working oil to the control valve unit 17 via the working oil line 16. In this embodiment, the main pump 14 is a swashplate type variable capacity hydraulic pump.

[0054] The regulator 14a is configured to control the discharge volume of the main pump 14. In this embodiment, the regulator 14a controls the discharge volume of the main pump 14 by adjusting the swashplate deflection angle of the main pump 14 according to a control signal from the controller 30, etc.

[0055] The pilot pump 15 is configured to supply working oil to various hydraulic control devices, including the operating device 26, via the pilot line 25. In this embodiment, the pilot pump 15 is a fixed-capacity hydraulic pump. However, the pilot pump 15 may be omitted. In this case, the function performed by the pilot pump 15 can be performed by the main pump 14. That is, in addition to supplying working oil to the control valve unit 17, the main pump 14 may also have the function of supplying working oil to the operating device 26 and the like after reducing the pressure of the working oil through a throttle or the like.

[0056] The control valve unit 17 is a hydraulic control device for controlling the hydraulic system in the construction machinery 100. The control valve unit 17 selectively supplies working oil discharged from the main pump 14 to one or more of the following: boom cylinder 7, stick cylinder 8, lifting magnet cylinder 9, left-side travel hydraulic motor 1L, right-side travel hydraulic motor 1R, and slewing hydraulic motor 2A. Furthermore, in the following description, the boom cylinder 7, stick cylinder 8, lifting magnet cylinder 9, left-side travel hydraulic motor 1L, right-side travel hydraulic motor 1R, and slewing hydraulic motor 2A are collectively referred to as "hydraulic actuators".

[0057] Operating device 26 is a device used by the operator to operate the hydraulic actuator. In this embodiment, operating device 26 generates pilot pressure by supplying working oil from pilot pump 15 to the pilot port of the corresponding flow control valve located in control valve unit 17. Specifically, operating device 26 includes a left operating lever for swing operation and boom operation, a right operating lever for boom operation and lifting magnet operation, travel pedals, and travel levers (not shown). The pilot pressure varies depending on the operation of operating device 26 (e.g., operation direction and operation amount).

[0058] The operating pressure sensor 29 is configured to detect the pilot pressure generated by the operating device 26. In this embodiment, the operating pressure sensor 29 detects the pilot pressure generated by the operating device 26 and outputs its detection value to the controller 30. The controller 30 determines the various operating actions of the operating device 26 based on the output of the operating pressure sensor 29.

[0059] The controller 30 is a control device that performs various operations. In this embodiment, the controller 30 is a microcomputer equipped with a CPU, volatile memory, and non-volatile memory. For example, the controller 30 reads programs corresponding to various functions from the non-volatile memory and loads them into the volatile memory for the CPU to execute processing corresponding to these programs.

[0060] The hydraulic pump 14G is configured to supply working oil to the hydraulic motor 60 via the working oil line 16a. In this embodiment, the hydraulic pump 14G is a fixed-capacity hydraulic pump that supplies working oil to the hydraulic motor 60 through the switching valve 61.

[0061] The switching valve 61 is configured to switch the flow of working oil discharged by the hydraulic pump 14G. In this embodiment, the switching valve 61 is a solenoid valve that switches its position according to a control command from the controller 30. The switching valve 61 has a first valve position that connects the hydraulic pump 14G to the hydraulic motor 60 and a second valve position that disconnects the connection between the hydraulic pump 14G and the hydraulic motor 60.

[0062] If the operation mode switch 62 switches the operation mode of the construction machinery 100 to the lifting magnet mode, the controller 30 outputs a control signal to the switching valve 61, switching the switching valve 61 to the first valve position. Furthermore, if the operation mode switch 62 switches the operation mode of the construction machinery 100 to a mode other than the lifting magnet mode, the controller 30 outputs a control signal to the switching valve 61, switching the switching valve 61 to the second valve position. Figure 2 The diagram shows the state of switching valve 61 in the second valve position.

[0063] The mode switching switch 62 is used to switch the operating mode of the construction machinery 100. In this embodiment, it is a rocker switch located in the cab 10. The operator operates the mode switching switch 62 to switch between excavator mode and crane magnet mode in a two-way selection. Excavator mode is the operating mode in which the construction machinery 100 operates as an excavator, for example, when a bucket is installed at the front end of the boom 5 in place of the crane magnet 6. Crane magnet mode is the operating mode in which the construction machinery 100 operates as a construction machine with a crane magnet, when a crane magnet 6 is installed at the front end of the boom 5. In addition, the controller 30 can also automatically switch the operating mode of the construction machinery 100 based on the output of various sensors.

[0064] When the lifting magnet mode is selected, the switching valve 61 is set to the first valve position, allowing the working oil discharged by the hydraulic pump 14G to flow into the hydraulic motor 60. On the other hand, when an operating mode other than the lifting magnet mode is selected, the switching valve 61 is set to the second valve position, preventing the working oil discharged by the hydraulic pump 14G from flowing into the hydraulic motor 60, and instead allowing it to flow out to the working oil tank.

[0065] The rotating shaft of the hydraulic motor 60 is mechanically connected to the rotating shaft of the generator 63. The generator 63 is configured to generate electricity for energizing the lifting magnet 6. In this embodiment, the generator 63 is an AC generator that operates according to control commands from the power control device 64.

[0066] The power control device 64 is configured to control the supply / cutoff of power for energizing the lifting magnet 6. In this embodiment, the power control device 64 controls the start / stop of AC power generation by the generator 63 based on a power generation start command / power generation stop command from the controller 30. The power control device 64 is configured to convert the AC power generated by the generator 63 into DC power and supply it to the lifting magnet 6. The power control device 64 is capable of controlling the magnitude of the voltage applied to the lifting magnet 6 and the magnitude of the current flowing through the lifting magnet 6.

[0067] If the lifting magnet switch 65 is turned on, the controller 30 outputs an adsorption command to the power control device 64. Upon receiving the adsorption command, the power control device 64 converts the AC power generated by the generator 63 into DC power and supplies it to the lifting magnet 6, thus energizing the lifting magnet 6. After energization, the lifting magnet 6 is in an adsorption state capable of attracting objects (magnetic bodies).

[0068] Furthermore, if the lifting magnet switch 65 is closed, the controller 30 outputs a release command to the power control device 64. Upon receiving the release command, the power control device 64 stops generating electricity from the generator 63, causing the lifting magnet 6, which is in an attracted state, to become unattracted (released). The release state of the lifting magnet 6 indicates that the power supply to the lifting magnet 6 has been stopped, causing the electromagnetic force generated by the lifting magnet 6 to disappear.

[0069] The lifting magnet switch 65 is a switch for switching the attraction / release of the lifting magnet 6. In this embodiment, the lifting magnet switch 65 includes a weak excitation button 65A and a strong excitation button 65B, which are push-button switches provided on the top of the left operating lever 26L, and a release button 65C, which is a push-button switch provided on the top of the right operating lever 26R.

[0070] The weak excitation button 65A is an example of an input device used to apply a predetermined first voltage to the lifting magnet 6, thereby putting the lifting magnet 6 into an attractive state (weak attractive state). The predetermined first voltage is, for example, the voltage set by the magnetic adjustment dial 66.

[0071] The strong excitation button 65B is an example of an input device used to apply a predetermined second voltage to the lifting magnet 6, thereby placing the lifting magnet 6 in an attracted state (strong attracted state). The predetermined second voltage is a voltage higher than the predetermined first voltage. The predetermined second voltage is, for example, the maximum allowable voltage.

[0072] The release button 65C is an example of an input device used to release the lifting magnet 6.

[0073] The magnetic adjustment turntable 66 is a turntable used to adjust the magnetic force (attraction force) of the lifting magnet 6. In this embodiment, the magnetic adjustment turntable 66 is provided inside the cab 10 and is configured to switch the magnetic force (attraction force) of the lifting magnet 6 when the weak excitation button 65A is pressed between four stages. Specifically, the magnetic adjustment turntable 66 is configured to switch the magnetic force (attraction force) of the lifting magnet 6 between four stages, from level 1 to level 4. Figure 2 The image shows that the magnetic adjustment dial 66 was used to select the third level of the state.

[0074] The lifting magnet 6 is controlled, for example, to generate a magnetic force (attraction force) at a level set by the magnetic force adjustment dial 66. The magnetic force adjustment dial 66 outputs data indicating the level of magnetic force (attraction force) to the controller 30.

[0075] According to this structure, the operator can simultaneously operate the left control lever 26L with the left hand and the right control lever 26R with the right hand to move the working attachments, while using their fingers to perform the attraction and release of the lifting magnet 6 onto the object (magnetic body). Typically, the operator attracts the iron filings to the lifting magnet 6 by pressing the weak excitation button 65A while the object (e.g., iron filings) is in contact with the lifting magnet 6. Then, the operator increases the magnetic force (attraction force) of the lifting magnet 6 by pressing the strong excitation button 65B after slowly raising the boom 4 to lift the lifting magnet 6 with the iron filings attracted. This is to prevent the iron filings from falling off the lifting magnet 6 when handling iron filings through attachment operations (including at least one of boom operation, stick operation, and bucket operation) or slewing operations.

[0076] Furthermore, the operator can classify objects by adjusting the magnetic force (attraction force) of the lifting magnet 6 using the magnetic adjustment turntable 66. For example, by using a relatively weak level of magnetic force (attraction force), the operator can selectively lift and move relatively light objects from the scrap heap, thus classifying relatively light and relatively heavy objects. This is because by using a relatively weak level of magnetic force (attraction force), the operator can prevent the lifting of relatively heavy objects.

[0077] The construction machinery 100 can also be configured to automatically switch its operating mode to a restricted mode based on the presence or magnitude of the magnetic force (attraction force) of the lifting magnet 6. Specifically, the construction machinery 100 can also be configured to automatically switch its operating mode to a speed-limiting mode when the weak excitation button 65A or the strong excitation button 65B is pressed. The speed-limiting mode, for example, is a lifting magnet mode that limits either the slewing speed or the drive speed of the attachments, or both.

[0078] Furthermore, the construction machinery 100 can automatically transition the state of the lifting magnet 6 to a strong adsorption state after a predetermined operation is performed following the pressing of the weak excitation button 65A, or when it is in a predetermined state. This strong adsorption state is the state when the strong excitation button 65B is pressed. The predetermined operation is, for example, a slewing operation. The predetermined state is, for example, the attachment being in a predetermined posture, specifically, the boom angle being at a predetermined angle. In this case, for example, after lifting the lifting magnet 6, which is in a weak adsorption state due to the pressing of the weak excitation button 65A, according to the boom lifting operation, and then performing a slewing operation, the construction machinery 100 can automatically transition the state of the lifting magnet 6 to the strong adsorption state even without pressing the strong excitation button 65B.

[0079] The display device 40 is a device for displaying various information. In this embodiment, the display device 40 is fixed to a pillar (not shown) at the front right side of the driver's cab 10, where the driver's seat is located. Furthermore, as... Figure 2 As shown, the display device 40 provides information to the operator by displaying information related to the construction machinery 100 on the image display unit 41. Furthermore, the display device 40 includes an operation unit 42 as an input device. The operator can use the operation unit 42 to input various commands to the controller 30.

[0080] The operation unit 42 is a panel including various switches. In this embodiment, the operation unit 42 includes a lighting switch 42a, a wiper switch 42b, and a window washer switch 42c, which are hardware buttons. The lighting switch 42a is used to switch the external lighting installed in the cab 10 on / off. The wiper switch 42b is used to switch the wipers on / off. The window washer switch 42c is used to spray window washer fluid.

[0081] The display device 40 is configured to operate by receiving power from the storage battery 70. The storage battery 70 is configured to be charged by power generated by the alternator 11a. Power from the storage battery 70 is also supplied to electrical components 72, other than the controller 30 and the display device 40. The starting device 11b of the engine 11 is configured to start the engine 11 by being driven by power from the storage battery 70.

[0082] Display device 50 (second display device) is a display device provided separately from display device 40 (first display device), and displays a loading operation screen when the construction machinery 100 is performing the operation of loading objects such as iron filings onto the carriage of the transport vehicle.

[0083] Similar to display device 40, display device 50 is fixed inside the cab 10 and is powered by electricity supplied from battery 70. Furthermore, display device 50 has an image display unit 51. In this embodiment, the image display unit 51 is, for example, a touch panel, capable of both image display and operation input reception. The display device 50 of this embodiment displays a loading action screen including information related to the loading action performed by the construction machinery 100. Details of the loading action screen will be described later.

[0084] The engine control unit 74 is configured to control the engine 11. In this embodiment, the engine control unit 74 collects various data representing the state of the engine 11 and sends the collected data to the controller 30. The engine control unit 74 is configured separately from the controller 30, but it can also be configured as an integral part. For example, the engine control unit 74 can be integrated into the controller 30.

[0085] The engine speed adjustment dial 75 is a dial used to adjust the engine speed. In this embodiment, the engine speed adjustment dial 75 is installed inside the cab 10 and is configured to switch the engine speed between four modes. Specifically, the engine speed adjustment dial 75 is configured to switch the engine speed between four modes: SP mode, H mode, A mode, and idle mode. Figure 2 The image shows the state where the engine speed adjustment dial 75 has selected the H mode.

[0086] SP mode is the engine speed mode selected when prioritizing workload, utilizing the highest engine speed. H mode is the engine speed mode selected when balancing workload and fuel efficiency, utilizing the second highest engine speed. A mode is the engine speed mode selected when prioritizing fuel efficiency while ensuring low-noise operation of the construction machinery, utilizing the third highest engine speed. Idle mode is the engine speed mode selected when the engine is operating at idle, utilizing the lowest engine speed (idle speed).

[0087] The engine 11 is controlled to maintain an engine speed corresponding to the speed mode set by the engine speed adjustment dial 75. The engine speed adjustment dial 75 outputs data indicating the set state of the engine speed to the controller 30.

[0088] Next, refer to Figure 3 An example of the structure of the main screen 41V displayed on the display device 40 will be described. Figure 3 The main screen 41V is displayed on the image display unit 41, for example, when the operation mode is the lifting magnet mode.

[0089] The main screen 41V includes a date and time display area 41a, a driving mode display area 41b, an accessory display area 41c, a fuel consumption rate display area 41d, an engine control status display area 41e, an engine running time display area 41f, a coolant temperature display area 41g, a fuel balance display area 41h, a speed mode display area 41i, a urea / water balance display area 41j, an oil temperature display area 41k, and a camera image display area 41x.

[0090] The walking mode display area 41b, accessory display area 41c, engine control status display area 41e, and speed mode display area 41i are areas for displaying setting status information, which is related to the setting status of the construction machinery 100. The fuel consumption rate display area 41d, engine running time display area 41f, coolant temperature display area 41g, fuel balance display area 41h, urea water balance display area 41j, and working oil temperature display area 41k are areas for displaying operating status information, which is related to the operating status of the construction machinery 100.

[0091] Specifically, the date and time display area 41a displays the current date and time. The walking mode display area 41b displays the current walking mode. The accessory display area 41c displays an image indicating the currently installed termination accessory. Figure 3 The image shown is of a state displaying a lifting magnet 6.

[0092] The fuel consumption rate display area 41d is the area that displays the fuel consumption rate information calculated by the controller 30. The fuel consumption rate display area 41d includes an average fuel consumption rate display area 41d1 that displays the lifetime average fuel consumption rate or the interval average fuel consumption rate, and an instantaneous fuel consumption rate display area 41d2 that displays the instantaneous fuel consumption rate.

[0093] The engine control status display area 41e displays the control status of the engine 11. The engine running time display area 41f displays the cumulative running time of the engine 11. The coolant temperature display area 41g displays the current temperature of the engine coolant. The fuel level display area 41h displays the remaining fuel level in the fuel tank. The engine speed mode display area 41i displays the current engine speed mode set using the engine speed adjustment dial 75. The urea water level display area 41j displays the remaining urea water level in the urea water tank. The working oil temperature display area 41k displays the temperature of the working oil in the working oil reservoir.

[0094] The camera image display area 41x is the area for displaying the image captured by the camera device 80. Figure 3 In the example, the camera image display area 41x displays the rear camera image captured by the rear camera 80B. The rear camera image is a rear view showing the space behind the construction machinery 100, including the image 3a of the counterweight.

[0095] Furthermore, the controller 30 can be configured to accumulate the current weight after recognizing, based on the image captured by the camera device 80, that the iron filings lifted by the lifting magnet 6 have been loaded onto the cargo compartment of the transport vehicle. This is to prevent iron filings that have moved to locations outside the cargo compartment of the transport vehicle from being counted as iron filings loaded onto the transport vehicle.

[0096] The controller 30 can determine whether the iron filings lifted by the lifting magnet 6 have been loaded onto the cargo compartment of the transport vehicle based on the posture of the work attachment. Specifically, the controller 30 can determine that the iron filings have been loaded onto the cargo compartment of the transport vehicle, for example, when the height of the lifting magnet 6 exceeds a predetermined value (e.g., the height of the cargo compartment of the transport vehicle) and the release button 65C is pressed.

[0097] The controller 30 can be configured to output an alarm when it determines that the current weight exceeds a predetermined value. The predetermined value is, for example, a value based on the rated lifting weight. The alarm can be a visual alarm, an audible alarm, or a tactile alarm. Through this configuration, the controller 30 can notify the operator that the current weight exceeds the predetermined value or that there is a risk.

[0098] When lifting relatively small scrap iron objects such as iron filings, the volume of scrap iron attracted to the lifting magnet 6 is limited, so the construction machinery 100 will not cause the current weight to be excessive. However, when lifting relatively large objects such as iron plates or iron blocks, the construction machinery 100 may sometimes lift excessively heavy objects, causing its stability SV to fall below a specified value (e.g., 1.0). Furthermore, the stability SV of the construction machinery 100 is represented by SV = (W2 × L2) / (W1 × L1). W1 is the weight of the working attachment (including the weight of the lifted object), and L1 is the horizontal distance from the overturning fulcrum to the center of gravity of the working attachment. W2 is the weight of the construction machinery 100 body (excluding the weight of the working attachment), and L2 is the horizontal distance from the overturning fulcrum to the center of gravity of the body.

[0099] If an excessively heavy object is lifted, the controller 30 can sound a buzzer and display an image indicating that the current weight exceeds a predetermined value on the display device 40. Therefore, the controller 30 can prevent the lifting of an excessively heavy object from continuing without the operator's notice. As a result, the controller 30 can improve the safety of operations performed by the construction machinery 100.

[0100] Next, refer to Figure 4 and Figure 5 The loading operation screen displayed on the image display unit 51 of the display device 50 will be described. Figure 4 The first image is an example of a loading animation.

[0101] Figure 4 The loading action screen displayed on the image display unit 51 includes display areas 52, 53, and 54. Furthermore, the loading action screen displayed on the image display unit 51 includes operation buttons 55a to 55h.

[0102] Display area 52 includes display bar 52a, operation buttons 52b, and display bar 52c. Display bar 52a displays icon images indicating the types of end-connection accessories installed on construction machinery 100. Figure 4 In the example, display panel 52a shows an icon representing the lifting magnet 6. Furthermore, the end-connection accessory installed on the construction machinery 100 is not limited to the lifting magnet 6; for example, it could be a bucket or a grappling hook.

[0103] Operation button 52b is used to prevent the calculated weight from being added to the cumulative weight of the object loaded onto the transport vehicle when releasing the object attracted to the lifting magnet 6. This operation button 52b is used, for example, when attracting an object not loaded onto the transport vehicle to the lifting magnet 6.

[0104] Display bar 52c is the area for displaying the weight of the object currently being lifted by the lifting magnet 6 (hereinafter referred to as "current weight"). Figure 4 The image shows the current weight as 720kg.

[0105] The controller 30 calculates the current weight, for example, based on the posture of the working attachment, the pressure at the bottom of the boom, and the specifications (weight and center of gravity position, etc.) of the pre-registered working attachment. Specifically, the controller 30 calculates the current weight based on the outputs of information acquisition devices such as the boom angle sensor S1, the stick angle sensor S2, the lifting magnet angle sensor S3, and the pressure sensor S6b.

[0106] Display area 53 includes display bars 53a, 53b, 53c, 53d, and 53e. Display bar 53a displays the difference between the weight of the object loaded onto the transport vehicle and the maximum load capacity. In other words, display bar 53a displays the difference between the weight of the object loaded onto the transport vehicle by the construction machinery 100 and the maximum load capacity of the transport vehicle.

[0107] Display bar 53b is an area for displaying the cumulative weight of the object lifted by the lifting magnet 6 within a specified period (hereinafter referred to as "cumulative weight"). Figure 4 The figure shows a cumulative weight of 22,380 kg. The weight of the object lifted by the lifting magnet 6 is accumulated, for example, each time the release button 65C is pressed.

[0108] The specified period is, for example, the period that begins when the operation button 55f (reset button) described later is pressed. For example, when the operator of the construction machinery 100 is performing an operation to load metal scrap onto the cargo bed of a transport vehicle, the operation button 55f is pressed each time the transport vehicle is switched between loading objects to reset the accumulated weight. This is to make it easy to track the total weight of the metal scrap loaded onto each transport vehicle.

[0109] According to this structure, the construction machinery 100 can suppress or prevent the loading of iron filings exceeding the maximum load capacity of the transport vehicle onto the transport vehicle's cargo compartment. Furthermore, the construction machinery 100 can suppress or prevent the weight of the iron filings loaded onto the transport vehicle's cargo compartment from being less than the transport vehicle's maximum load capacity.

[0110] If a weighbridge indicates that the load of scrap metal exceeds the maximum load capacity, the driver of the transport vehicle must return to the loading and storage area to unload a portion of the scrap metal from the truck bed. Alternatively, if a weighbridge indicates that the weight of the scrap metal on the truck bed is less than the maximum load capacity of the transport vehicle, the driver must return to the loading and storage area to add more scrap metal. Construction machinery 100 prevents repeated adjustments to the load weight. For example, construction machinery 100 can complete the load weight adjustment in one operation.

[0111] The specified period can be, for example, from the start time of the day's work to the end time of the day's work. This is to make it easy for operators or managers to identify the total weight of iron filings handled throughout the day's work.

[0112] Display bar 53c shows the maximum load capacity of the transport vehicle. Display bar 53d shows the vehicle identification information (license plate number) and the name of the driver of the transport vehicle.

[0113] Furthermore, the maximum load capacity and license plate number of the transport vehicle can be pre-registered when the transport vehicle is selected by operating the operation button 55b (described later). The driver of the transport vehicle can also be registered by operating the operation button 55a (described later). The name of the operator of the construction machinery 100 can also be displayed in the display panel 53d.

[0114] Display bar 53e shows a bar graph representing the ratio of the weight of the loaded object (load weight) to the maximum load weight of the transport vehicle. Figure 4 In the example, in the bar chart displayed in display bar 53e, if the loaded weight reaches a certain percentage, the display color of the bar chart will change.

[0115] For example, when the loaded weight is less than 80% of the maximum load weight, the corresponding area of ​​the bar chart can be displayed in green; when the loaded weight is more than 80% of the maximum load weight, the corresponding area of ​​the bar chart can be displayed in yellow. Furthermore, when the loaded weight exceeds the maximum load weight, the area of ​​the bar chart corresponding to the excess can be displayed in red. Additionally, notifications can be given using sound or light when the loaded weight exceeds the maximum load weight.

[0116] exist Figure 4 In the example, in the bar chart displayed in display bar 53e, area 53e1 can be displayed in green, and area 53e2 can be displayed in yellow. Furthermore, in Figure 4In the example, if the loaded weight exceeds the maximum loaded weight, area 53e3 can be displayed in red.

[0117] In this embodiment, by displaying the ratio of the loaded weight to the maximum loaded weight of the transport vehicle using different display colors, the operator of the construction machinery 100 can visually grasp the available space in the vehicle compartment.

[0118] Display area 54 includes a display bar 54a and operation buttons 54b. Display bar 54a displays the history of loading actions. Figure 4 Display panel 54a shows, for example, that in the 25th loading action, a 760kg object was loaded onto the transport vehicle, and in the 26th loading action, an 1100kg object was loaded onto the transport vehicle. Furthermore, in Figure 4 As shown in display panel 54a, a 70kg object was loaded onto the transport vehicle during the 27th loading action.

[0119] In other words, as shown in display panel 54a, for example, it can be seen that in the 25th loading action, a 760kg object was attracted and lifted by the lifting magnet 6 and then released, and in the 28th loading action, a 1050kg object was attracted and lifted by the lifting magnet 6 and then released. Furthermore, in Figure 4 As can be seen from display bar 54a, during the 28th loading action, the 1050kg object was attracted and lifted by the lifting magnet 6 before being released.

[0120] Operation button 54b is used to delete the history of the selected loading action in the history displayed in the display bar 54a.

[0121] For example, if the 27th loading action is selected in display bar 54a and operation button 54b is selected, the weight of the object loaded onto the transport vehicle in the 27th loading action and the 70 kg added to the loading weight will be subtracted from the cumulative weight displayed in display bar 53b.

[0122] During the loading process of an object onto a transport vehicle, in order to remove an object outside the object being loaded, the object may sometimes be attracted and lifted, and then released to a distant location.

[0123] In this embodiment, in the history of loading actions displayed on display bar 54a, the weight of the objects lifted in the 27th and 29th loading actions is significantly less than that in other loading actions. In this case, the loading action is for removing objects other than the target object. Therefore, the operator of the construction machinery 100 can subtract the weight of the objects lifted in the 27th and 29th loading actions from the accumulated weight by selecting the history of the 27th and 29th loading actions and selecting operation button 54b.

[0124] Operation button 55a is used to navigate to the registration screen for registering the operator of the construction machinery 100. The registration screen for the operator of the construction machinery 100 may be, for example, a screen for entering the name of the operator of the construction machinery 100, or a screen displaying a list of pre-registered operator names.

[0125] Operation button 55b is used to switch the loading action screen displayed on the image display unit 51 to a registration screen to register the license plate numbers of the transport vehicles displayed on the display bar 53d. The registration screen for the license plate numbers of the transport vehicles may be, for example, a screen for inputting the license plate numbers of the transport vehicles, or a screen for displaying a list of pre-registered license plate numbers of transport vehicles.

[0126] Operation button 55c is used to enable the construction machinery 100 to perform loading operations. If an object is lifted by the lifting magnet 6 after operation button 55c is pressed, the controller 30 of this embodiment adds the weight of the lifted object to the loading weight displayed in the display bar 53b.

[0127] Operation button 55d is used to perform an unloading action on the construction machinery 100. If the lifting magnet 6 lifts an object after operating operation button 55d, the controller 30 of this embodiment subtracts the weight of the lifted object from the load weight displayed in the display bar 53b.

[0128] Operation button 55e is used to temporarily stop the addition of the weight of the object being lifted by the lifting magnet 6 to the cumulative weight displayed in the display bar 53b. In this embodiment, if operation button 55e is activated, the controller 30 will not add the weight of the object to the cumulative weight even if the lifting magnet 6 lifts the object.

[0129] In addition, in this embodiment, if the operation button 55e is selected again, the controller 30 can release the operation that temporarily stops the addition of weight to the cumulative weight.

[0130] Operation button 55f is used when the loading action for the transport vehicle is completed. If operation button 55f is activated, the accumulated weight displayed in display panel 53b will be reset. Operation button 55f can also be a hardware button located on the operation unit 42, left operating lever 26L, or right operating lever 26R, etc.

[0131] Furthermore, the controller 30 can be configured to automatically identify the alternation of transport vehicles and automatically reset the accumulated weight. In this case, the controller 30 can identify the alternation of transport vehicles using images captured by the camera device 80, or it can identify the alternation of transport vehicles using a communication device.

[0132] Furthermore, when the operation button 55f is operated, the controller 30 can consider the loading action for the transport vehicle determined by the license plate number displayed in the display bar 52d as completed, and transfer the loading action screen to the transport vehicle selection screen. Then, when a transport vehicle is selected, the controller 30 can display a new transport vehicle loading action screen for the selected transport vehicle whose license plate number is displayed in the display bar 53d.

[0133] Operation button 55g is used to transfer the loading action screen displayed on the image display unit 51 to a setting screen for performing various settings related to the loading action. When operation button 55g is operated, the controller 30 transfers the loading action screen to the setting screen.

[0134] Specifically, for example, in this embodiment, the operator of the construction machinery 100 receives a notification of the cumulative weight as a measurement result from the person in charge of the weighbridge when the transport vehicle moves from the loading and storage yard to an area equipped with a weighbridge for weighing.

[0135] In this embodiment, if the cumulative weight notified at this time is inconsistent with the cumulative weight displayed in display bar 53b, the operator of the construction machinery 100 can rewrite the cumulative weight displayed in display bar 53b on the setting screen as the cumulative weight (actual load) as measured by the truck scale.

[0136] In this embodiment, the load weight calculated in the construction machinery 100 can be rewritten as the actual measured cumulative weight, so that when the transport vehicle returns to the loading and storage yard after being weighed on a truck scale, loading or unloading can be performed based on the actual cumulative weight.

[0137] Operation button 55h is used to switch between loading mode and adjustment mode during the loading operation. In this embodiment, the loading operation is performed in loading mode when operation button 55h is not selected. Furthermore, in this embodiment, operating operation button 55h switches from loading mode to adjustment mode.

[0138] Furthermore, in this embodiment, the loading mode and adjustment mode are switched using the operation button 55h displayed on the loading action screen, but this is not a limitation. Switching between the loading mode and adjustment mode can also be performed, for example, by operating a switch provided on the operation device 26.

[0139] Display bar 56 shows the current time.

[0140] In this way, the loading action mode and adjustment mode can be switched on the loading action screen of this embodiment.

[0141] Figure 5The second image is an example of a loading animation. Figure 5 The loading action screen shown is, for example, an example of a loading action screen when a transport vehicle finishes weighing on the truck scale and returns to the loading and storage yard for unloading.

[0142] It is known that operation button 55d was selected, thus the action of construction machinery 100 is unloading. Furthermore, in Figure 5 In the example, we can see that operation button 55h was selected, thus performing the loading action in adjustment mode.

[0143] Furthermore, it can be seen that the current weight displayed in display bar 52c is "-520kg", and the current weight is subtracted from the cumulative weight.

[0144] Furthermore, in Figure 5 In the display panel 53b, the cumulative weight exceeds the maximum load weight displayed in the display panel 53c. Therefore, the display panel 53a displays the weight that needs to be unloaded to bring the cumulative weight closer to the maximum load weight, which is -2930 kg.

[0145] Thus, in this embodiment, for example, loading can be performed in loading mode before weighing on the truck scale, and adjustment can be performed in adjustment mode after weighing on the truck scale, so that the cumulative weight is close to the maximum loading weight.

[0146] As described above, in this embodiment, by setting an adjustment mode with weight calculation conditions and a loading mode with more lenient weight calculation conditions in the loading operation and combining them, objects can be quickly loaded onto the transport vehicle.

[0147] In addition, Figure 4 and Figure 5 The description focuses on the image display unit 51 of the display device 50 displaying the loading operation screen, but it is not limited to this. For example, if there is only one display device installed on the construction machinery 100, the loading operation screen can also be displayed on that display device together with the loading operation screen. Figure 3 The rear view of the construction machinery 100 or an overhead view of the construction machinery 100 shown.

[0148] The following is for reference. Figure 6 The effects of this implementation method will be explained. Figure 6 This is a diagram illustrating the effects of this embodiment.

[0149] Figure 6 The results of loading time, adjustment time and operation time are shown in Comparative Examples 1 and 2 when the target load is set to 23t and the case applicable to this embodiment.

[0150] Comparative Example 1 shows a case where, when loading an object from construction machinery 100 onto a transport vehicle, the weight of the object lifted by the lifting magnet 6 is not calculated, and loading is performed by visual inspection by the operator of construction machinery 100 and then weighed on a truck scale. Comparative Example 2 shows a case where, when loading an object onto a transport vehicle, the weight of the object lifted by the lifting magnet 6 is calculated in adjustment mode and then weighed on a truck scale.

[0151] Depend on Figure 6 As can be seen from the example, in Comparative Example 1, the loading time from the start of loading the object onto the transport vehicle until the object on the transport vehicle reaches its maximum load weight is 24.6 minutes. Furthermore, in Comparative Example 1, the adjustment time required to bring the cumulative weight of the transport vehicle close to the maximum load weight after weighing on the truck scale is 9.2 minutes. Therefore, the operation time of Comparative Example 1 is 33.8 minutes, which is the sum of 24.6 minutes and 9.2 minutes.

[0152] In Comparative Example 3, the loading time was 24.8 minutes and the adjustment time was 1.2 minutes, so the operation time of Comparative Example 2 was 26.0 minutes.

[0153] In contrast, when this embodiment is applied, the loading time is 20.3 minutes, the adjustment time is 3.5 minutes, and the operation time is 23.8 minutes.

[0154] Thus, it can be seen that in this embodiment, the operation time is shortened, thereby improving the operation efficiency.

[0155] Therefore, in this embodiment, for example, even if the transport vehicle is a large vehicle weighing 20 tons or more, resulting in more loading times until the cargo compartment is full than a standard transport vehicle, the loading operation can be carried out quickly.

[0156] The embodiments described above have been illustrated with reference to specific examples. However, the present invention is not limited to these specific examples. Any design modifications made appropriately to these specific examples by those skilled in the art, provided they possess the features of the present invention, are also included within the scope of the present invention. The elements, their configurations, conditions, and shapes in the above-described specific examples are not limited to the examples and can be appropriately modified. The elements in the above-described specific examples can also be appropriately combined as long as they do not create technical contradictions.

[0157] For example, in the above embodiment, the loading mode can be automatically switched to the adjustment mode by recognizing the change from before to after weighing on a truck scale. Furthermore, the determination of whether the current operation is before or after weighing on a truck scale can also be based on the output of the spatial recognition device 70. Moreover, the determination of whether the current operation is before or after weighing on a truck scale can also be based on information related to truck scale regulations received by the excavator 100. This information related to truck scale regulations may include, for example, notifications regarding the return of transport vehicles to the loading and storage area after weighing on a truck scale.

[0158] Furthermore, for example, in the above embodiment, when loading is being performed onto the cargo compartment of a transport vehicle, the loading mode can be automatically switched from loading mode to loading mode when the load weight approaches the maximum load weight.

[0159] Furthermore, this international application claims priority based on Japanese Patent Application 2021-061460, filed on March 31, 2021, and incorporates all contents of Japanese Patent Application 2021-061460 into this international application.

[0160] Symbol Explanation

[0161] 1-Lower traveling body, 2A-Slewing mechanism, 3-Upper slewing body, 4-Boom, 5-Stick, 6-Lifting magnet, 7-Boom cylinder, 8-Stick cylinder, 9-Lifting magnet cylinder, 10-Cock's cab, 11-Engine, 26-Operating device, 30-Controller, 40, 50-Display device.

Claims

1. A construction machine having a load calculation function, wherein, The construction machinery has a controller for implementing both the first mode and the second mode. The accuracy of the load calculation function in the first mode is different from the accuracy of the load calculation function in the second mode. The specific operational conditions required by the first mode include the lifting magnet of the construction machinery passing through an area of ​​a certain height. The weight calculation conditions in the second mode are more lenient than those in the first mode by relaxing the conditions related at least to the area of ​​the certain height. The controller is configured to calculate the cumulative weight of objects loaded onto the transport vehicle. The controller is configured to operate in the second mode before the cumulative weight approaches the maximum load weight of the transport vehicle, and to switch to the first mode by operator operation when the cumulative weight approaches the maximum load weight.

2. The construction machinery according to claim 1, wherein, The weight calculation conditions set for the construction machinery in the second mode are different from those set for the construction machinery in the first mode.

3. The construction machinery according to claim 1 or 2, wherein, The construction machinery has a display device. The display device displays a screen related to the load calculation function. The actual load value is input by operating the screen.

4. The construction machinery according to claim 3, wherein, The actual load value is obtained by measuring the transport vehicle after the object is loaded using the construction machinery.

5. The construction machinery according to claim 3 or 4, wherein, The first mode and the second mode are switched by operating the screen or by operating a switch located in the cockpit.

6. The construction machinery according to any one of claims 3 to 5, wherein, The load calculation function is used to calculate the weight of the lifted object during the loading action of loading the object, which is being lifted by the end attachment of the construction machinery, onto the transport vehicle. The loading action has the first mode and the second mode.

7. The construction machinery according to claim 6, wherein, The identification information of the transport vehicle, the driver of the transport vehicle, and the operation of the construction machinery operator are processed and registered by operating the screen.

8. The construction machinery according to claim 1, wherein, The construction machinery is equipped with a perimeter monitoring device. The detection results from the surrounding monitoring device are used to determine whether the object lifted by the construction machinery has been loaded onto the cargo compartment of the transport vehicle.

9. The construction machinery according to claim 1, wherein, The construction machinery has a display device that displays the weight of the object loaded by the construction machinery.

10. The construction machinery according to claim 9, wherein, The display device simultaneously displays the weight of the object loaded by the construction machinery and its set status information or operating status information.

11. The construction machinery according to claim 9, wherein, The display device includes a first display device and a second display device. The first display device displays setting status information or operating status information, and the second display device displays the weight of the object loaded by the construction machinery.

12. The construction machinery according to claim 9, wherein, The display device simultaneously displays the weight of the object loaded by the construction machinery and the captured image.

13. The construction machinery according to claim 9, wherein, The display device includes a first display device and a second display device. The first display device displays the captured image, and the second display device displays the weight of the object loaded using the construction machinery.

14. A load calculation system for construction machinery, wherein, The load calculation system for the construction machinery has a controller that enables both the first and second modes. The accuracy of the load calculation function in the first mode is different from the accuracy of the load calculation function in the second mode. The specific operational conditions required by the first mode include the lifting magnet of the construction machinery passing through an area of ​​a certain height. The weight calculation conditions in the second mode are more lenient than those in the first mode by relaxing the conditions related at least to the area of ​​the certain height. The controller is configured to calculate the cumulative weight of objects loaded onto the transport vehicle. The controller is configured to operate in the second mode before the cumulative weight approaches the maximum load weight of the transport vehicle, and to switch to the first mode by operator operation when the cumulative weight approaches the maximum load weight.

Images