A hoisting machine and a method for adjusting the supporting force

Abstract

This application relates to the field of lifting equipment technology, specifically providing a hoisting machine and a support adjustment method. The hoisting machine includes a chassis, which comprises a frame, a first front axle, and a second front axle connected to the frame. The first and second front axles are independently mounted on the frame, or the first and second front axles form a modular front axle assembly connected to the frame. Increasing the load capacity generally requires increasing the frame and axle dimensions to meet load-bearing and stability requirements, but this easily leads to exceeding specifications and limitations. The hoisting machine provided in this application uses multi-axle support at the front end of the frame. By increasing the number of front axles, it significantly increases the machine's load-bearing capacity and load capacity without increasing the size or requirements of the axles and the frame itself, thus at least partially solving the problem of insufficient front axle load-bearing capacity in existing front-end hoisting cranes.

Description

Technical Field

[0001] This application relates to the field of lifting equipment technology, specifically to a hoisting machine and a support adjustment method. Background Technology

[0002] Cranes lift heavy objects using their booms. As the lifting capacity increases, the load-bearing capacity of the crane's front and rear axles needs to increase accordingly. For reach stackers (reach lifting cranes), the load-bearing capacity of the front axle and tires determines the upper limit of the lifting weight. When there are heavy load requirements, the front axle's load-bearing capacity is easily insufficient, and the ground pressure of the front axle tires is easily too high. Summary of the Invention

[0003] In view of this, this application aims to provide a hoisting machine with a multi-axle support at the front end of the frame. By increasing the number of front axles, the load-bearing capacity and load limit of the machine can be multiplied without increasing the size or requirements of the axles and the frame itself, so as to at least partially solve the problem of insufficient front axle load-bearing capacity in the prior art of front hoisting cranes.

[0004] This application provides a hoisting machine, including a chassis. The chassis includes a frame, a first front axle and a second front axle connected to the frame. The first front axle and the second front axle are independently mounted on the frame, or the first front axle and the second front axle form a modular front axle assembly, and the front axle assembly is connected to the frame.

[0005] In one possible implementation, the front axle assembly includes a connecting frame hinged to the vehicle frame to swing in the longitudinal direction of the vehicle frame, with both the first and second front axles connected to the connecting frame.

[0006] In one possible implementation, either the first front axle or the second front axle is flexibly connected to the frame via an elastic connector to float in the height direction, while the other is fixedly connected to the frame; or, either the first front axle or the second front axle is flexibly connected to the connecting frame of the front axle assembly via an elastic connector to float in the height direction, while the other is fixedly connected to the connecting frame.

[0007] In one possible implementation, the first or second front axle is flexibly connected to the vehicle frame via an elastic connector. The pressure device of the elastic connector can adjust the pressure and is connected to a control system to adjust the support force of the floating front axle.

[0008] In one possible implementation, the chassis is provided with: a counterweight, movably mounted on the frame; and a second power source, which drives the counterweight to move to adjust the position of the counterweight in the longitudinal direction of the chassis.

[0009] In one possible implementation, the control system includes:

[0010] The first detector detects the pitch angle of the boom;

[0011] The second detector detects the length of the boom;

[0012] The third detector detects the output pressure of the pitching force that drives the boom to pitch and rotate.

[0013] The controller is communicatively connected to each detector and is also connected to the pitch power and the first power for adjusting the telescopic length of the boom.

[0014] In one possible implementation, the control system further includes: a fourth detector for detecting the position of the counterweight on the chassis; and / or a fifth detector for detecting and supporting the floating front axle; wherein the controller is communicatively connected to the fourth detector and / or the fifth detector, and connected to the second power and the pressure device to adjust the supporting force of the floating front axle and the position of the counterweight.

[0015] In one possible implementation, a limiting structure is provided between the floating front axle and the floating connection object to prevent the floating front axle from misaligning in the length and width directions of the frame.

[0016] In one possible implementation, the limiting structure includes:

[0017] The first limiting member is arranged along the length of the vehicle frame, with one end fixedly connected to the floating front axle and the other end movably connected to the floating connection object, so as to float with the floating front axle and limit the floating front axle.

[0018] The second limiting member is arranged along the width direction of the vehicle frame. One end is hinged to the floating connection object, and the other end is hinged to the first limiting member or the floating front axle, so as to float with the floating front axle and limit the floating front axle.

[0019] In one possible implementation, either the first front axle or the second front axle is hinged to the connecting frame to swing in the width direction of the frame, while the other is fixed to the connecting frame.

[0020] This application also provides a support force adjustment method, applicable to the hoisting machinery described above, the method comprising the following:

[0021] Obtain the support force of the front axle and the support force of the rear axle, which are fixedly connected to the vehicle frame;

[0022] Detect whether the support force of the fixed front axle is greater than a first preset value. If it is greater than the first preset value, take a first adjustment measure to make the support force of the fixed front axle less than the first preset value.

[0023] The system detects whether the support force of the rear axle is within a preset range. If it exceeds the preset range, a second adjustment measure is taken to bring the support force of the rear axle within the preset range.

[0024] In one possible implementation, the following is also included:

[0025] The output pressure of the pitching power, the boom elevation angle and boom length of the lifting boom, and the supporting force of the floating front axle are obtained. Based on the output pressure, boom elevation angle and boom length, the bearing capacity of the rear axle and the total bearing capacity of the front axle are obtained.

[0026] The support force of the front axle fixed to the frame is obtained based on the total load-bearing capacity of the front axle and the support force of the floating front axle.

[0027] In one possible implementation, the first adjustment measure includes any one or any combination of increasing the boom elevation angle, decreasing the boom length, increasing the distance between the counterweight and the front axle, and increasing the support force of the floating front axle; the second adjustment measure includes any one or any combination of adjusting the boom elevation angle, adjusting the boom length, adjusting the distance between the counterweight and the front axle, and adjusting the support force of the floating front axle.

[0028] According to the hoisting machinery provided in this application, its chassis is equipped with a first front axle and a second front axle, forming a double front axle structure. The two front axles share the supporting force of the hoisting load. Thus, by increasing the number of front axles, the load-bearing capacity and load limit of the machinery can be multiplied without increasing the size or structural requirements of the axles and the chassis itself. Its load-bearing capacity is about twice that of a single front axle chassis of the same size, which can greatly increase the load limit when hoisting heavy objects. At the same time, it also ensures that the ground pressure of the front axle tires meets the requirements of the site and the tire load-bearing capacity. No additional hoisting supports are required, and the structure is simple. Attached Figure Description

[0029] Figure 1 The diagram shown is a schematic representation of the first angle of the hoisting machinery in some embodiments of this application;

[0030] Figure 2The diagram shown is a schematic representation of the second angle of the hoisting machinery in some embodiments of this application;

[0031] Figure 3 The diagram shown is a schematic representation of the third angle of the hoisting machinery in some embodiments of this application;

[0032] Figure 4 The diagram shown is a schematic representation of the fourth angle of the hoisting machinery in some embodiments of this application;

[0033] Figure 5 The diagram shown is a schematic representation of the first angle of the hoisting machinery in some other embodiments of this application;

[0034] Figure 6 The diagram shown is a schematic representation of the second angle of the hoisting machinery in some other embodiments of this application;

[0035] Figure 7 The diagram shown is a schematic representation of the third angle of the hoisting machinery in some other embodiments of this application;

[0036] Figure 8 The diagram shown is a schematic of a hoisting machine in another embodiment of this application;

[0037] Figure 9 The diagram shown is a schematic of the front axle and the connecting frame hinged in some embodiments of this application;

[0038] Figure 10 The diagram shown is a first angle schematic of the floating arrangement of the front axle and the connecting frame in other embodiments of this application;

[0039] Figure 11 The diagram shown is a second-angle schematic of the floating arrangement of the front axle and the connecting frame in other embodiments of this application;

[0040] Figure 12 The diagram shown is a third-angle schematic of the floating arrangement of the front axle and connecting frame in other embodiments of this application;

[0041] Figure 13 The diagram shown is a flowchart illustrating the method for adjusting the support force in some embodiments of this application.

[0042] Figures 1-12 middle:

[0043] 1. Chassis; 2. First front axle; 3. Second front axle; 4. Rear axle; 5. Boom; 6. Counterweight; 7. Flexible connector; 8. First limiting member; 9. Second limiting member; 10. Connecting frame; 11. First articulation shaft; 12. Buffer; 13. Second articulation shaft; 14. Power unit; 15. Hydraulic pump; 16. Engine. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Please refer to the attached document. Figure 1-13 This application provides a hoisting machine, including a chassis, a lifting boom mounted on the chassis, and a pitching power source for driving the lifting boom to pitch and rotate. The chassis includes a frame 1, a rear axle 4, a first front axle 2, and a second front axle 3. The first front axle 2 and the second front axle 3 are arranged along the length of the frame 1, and their axial directions are aligned with the width direction of the frame 1. In one configuration, the first front axle 2 and the second front axle 3 are respectively connected to the frame 1. The two front axles are independently configured and each provides support without directly affecting the others, ensuring stable support. In another configuration, the first front axle 2 and the second front axle 3 form a modular front axle assembly, which is connected to the frame 1. Thus, the two front axles form an integral module, integrally connected to the frame 1. This provides structural performance that allows for flexible overall swinging while providing stable support for the frame 1, and also facilitates overall disassembly and replacement.

[0046] It is evident that this lifting machinery significantly increases its load-bearing capacity and maximum load limit by increasing the number of front axles without increasing the size or structural requirements of the axles or chassis itself. For example, with dual front axles, the overall load-bearing capacity of the front axles is improved. Without significantly altering the chassis dimensions (only adjustments are needed based on the multi-axle wheelbase, without substantially increasing the chassis size due to load-bearing requirements), its load-bearing capacity is approximately twice that of a single-front-axle machine of the same size. This is especially beneficial when lifting loads from the front, greatly increasing the maximum load limit when lifting heavy objects. Simultaneously, it ensures that the ground pressure of the front axle tires meets site requirements and tire load-bearing capacity requirements, preventing tire ruptures under excessively heavy loads. Furthermore, it eliminates the need for additional lifting ground supports, as in existing technologies where ground supports are installed on the chassis. When lifting heavy objects, the ground supports extend to the ground to increase load-bearing capacity or replace tire grounding to prevent wheel bursts; when not lifting heavy objects, the ground supports retract, resulting in a simple structure. At the same time, the dual front axle support provides stability, facilitating movement with loads and enhancing the mobility of the lifting machinery.

[0047] One end of the boom 5 is hinged to the vehicle frame 1 for pitch rotation, and the other end is used for lifting loads. The pitching power is typically a hydraulic cylinder, with the cylinder body connected to the vehicle frame 1 and the telescopic rod hinged to the boom 5, driving the boom 5 to pitch rotation. Along the length of the vehicle frame 1, the connection point between the pitching power and the vehicle frame 1 can be located between the first front axle 2 and the second front axle 3, such as... Figure 1 As shown, it can also be located on one side of the first front axle 2 and the second front axle 3.

[0048] First, an example is given of a structure in which the first front axle 2 and the second front axle 3 are connected to the frame 1 respectively, and the two front axles are set independently.

[0049] When the first front axle 2 and the second front axle 3 are respectively connected to the frame 1, in some embodiments, the first front axle 2 and the second front axle 3 are respectively fixedly connected to the frame 1, for example, by fasteners. The connection is stable and the support is stable, which can enhance the stability of the lifting load.

[0050] In some embodiments, either the first front axle 2 or the second front axle 3 is flexibly connected to the frame 1 to float in the height direction, while the other is fixedly connected to the frame 1. This arrangement not only provides stable support for the frame 1 and stability for lifting loads, but also enhances shock absorption performance. Furthermore, by floating in the height direction, in some embodiments, for example, when the support force at the flexible connection can be adjusted, the support force of the floating front axle can be actively adjusted. This allows for proactive adjustment of the load-bearing capacity distribution of the first front axle 2 and the second front axle 3, ensuring that the load on the front axle fixedly connected to the frame 1 is within a tolerable range, as detailed in the embodiments described later.

[0051] The front axle, which is flexibly connected to the frame 1 via an elastic connector 7, allows for floating. In some embodiments, the elastic connector 7 has a pressure device, such as a shock absorber or damper, for example, a hydropneumatic suspension, a shock absorber cylinder, or an air suspension. This provides both shock absorption performance and, when the pressure device of the elastic connector 7 can adjust its own pressure, it can also actively adjust the support force of the front axle to subjectively distribute the support force among the axles.

[0052] like Figure 2 and Figure 3 As shown, in some embodiments, the first front axle 2 is flexibly connected to the frame 1 via an elastic connector 7, and the second front axle 3 is fixedly connected to the frame 1. In some other embodiments, such as Figures 5 to 7 As shown, the second front axle 3 is flexibly connected to the frame 1 via an elastic connector 7, while the first front axle 2 is fixedly connected to the frame 1. Of course, the first front axle 2 or the second front axle 3 can also be flexibly connected to the frame 1 via other elastic components such as ordinary springs.

[0053] To enhance the stability of the connection between the floating front axle and the frame 1, in some embodiments, a limiting structure is provided on the frame 1 to prevent the floating front axle from shifting in the length and width directions of the frame 1. This ensures that the floating front axle can float in the height direction while preventing it from shifting in the length and width directions, thus enhancing the stability of the front axle.

[0054] Specifically, in some embodiments, the limiting structure includes a first limiting member 8 and a second limiting member 9. The first limiting member 8 is arranged along the length direction of the vehicle frame, with one end fixedly connected to the floating front axle and the other end movably connected to the vehicle frame 1, so as to float with the floating front axle and prevent the floating front axle from undergoing large misalignment in the length direction of the vehicle frame 1. Figures 5-7 As shown, taking the flexible connection between the second front axle 3 and the frame 1 as an example, one end of the first limiting member 8 is fixedly connected to the second front axle 3, and the other end is movably connected to the frame 1. This movable connection can be a hinge, for example, through a hinged ball, or through a hinge shaft provided along the width or height direction of the frame 1, so that it can float in the height direction with the second front axle 3; or it can be a sliding connection, for example, a slider is hinged to the other end of the first limiting member 8, and the slider is slidably connected to the frame 1, so that the first limiting member 8 can float in the height direction with the second front axle 3. At the same time, due to the connection restriction of the first limiting member 8 in the length direction of the frame 1, the second front axle 3 is effectively prevented from moving in the length direction of the frame 1.

[0055] Meanwhile, the connection between the first limiting member 8 and the second front axle 3 can be achieved by having a connecting plate at the end of the first limiting member 8 that fits snugly against the bridge or a connecting pipe sleeved on the bridge, thereby enhancing the stability of the connection. Specifically, the first limiting member 8 can be a connecting plate or a connecting bracket.

[0056] The second limiting member 9 is arranged along the width direction of the frame 1, with one end hinged to the frame 1 and the other end hinged to the first limiting member 8 or the floating front axle. The axial direction of the hinge shafts at both ends is consistent with the length direction of the frame 1. Therefore, it does not restrict the floating front axle from floating in the height direction, and it can prevent the front axle from displacing relative to the frame 1 in the width direction of the frame 1. Figure 2 As shown, when the first front axle 2 and the frame 1 are floating, the second limiting member 9 can be positioned above the first limiting member 8, as follows: Figure 7 As shown, when the second front axle 3 is floating with the frame 1, the second limiting member 9 can be positioned below the first limiting member 8.

[0057] The second limiting member 9 can be rod-shaped or have other structural forms.

[0058] As illustrated in the above embodiments, the first front axle 2 and the second front axle 3 can be mounted on the vehicle frame 1 through two different structures. The above embodiments have described the technical content of the first front axle 2 and the second front axle 3 being independently mounted and connected to the vehicle frame 1 respectively. Below, the structure in which the first front axle 2 and the second front axle 3 form a modular front axle assembly and are connected to the vehicle frame 1 as a whole will be described in detail.

[0059] like Figure 8As shown, in some embodiments, the front axle assembly includes a connecting frame 10, on which both the first front axle 2 and the second front axle 3 are connected. The connecting frame 10 is connected to the vehicle frame 1.

[0060] In some embodiments, the connecting frame 10 is hinged to the vehicle frame 1 via a first hinge shaft 11. The axial direction of the first hinge shaft 11 is consistent with the axial direction of the two front axles and the width direction of the vehicle frame 1. Thus, the connecting frame 10, carrying the two front axles, can swing as a whole in the length direction and travel direction of the vehicle frame 1. When traveling on uneven roads, the front axle assembly can dynamically adjust its travel angle, better adapting to different terrains, improving the chassis's flexible travel capability, and enhancing its maneuverability when moving with a load. Furthermore, with the first front axle 2 and the second front axle 3 connected to the connecting frame 10, the front axle assembly swings as a whole, and the chassis and bottom surface are always in surface contact, ensuring smooth movement when automatically adapting to uneven roads.

[0061] Of course, in other embodiments, the connecting frame 10 and the vehicle frame 1 may be connected by a suspension or a fixed connection.

[0062] The first front axle 2 and the second front axle 3 are respectively connected to the connecting frame 10. In some embodiments, either the first front axle 2 or the second front axle 3 is flexibly connected to the connecting frame 10 via an elastic connector 7, allowing it to float in the height direction of the vehicle frame 1, while the other is fixedly connected to the connecting frame 10. This arrangement allows for the overall swinging of both front axles, while also enabling one front axle to float in the height direction, enhancing shock absorption performance and allowing for better adjustment of the load-bearing capacity of each axle.

[0063] As described in the above embodiments, in some embodiments, the elastic connector 7 has a pressure device, such as a shock absorber, a buffer, etc., for example, a hydro-pneumatic suspension, a shock-absorbing cylinder, an air suspension, etc. In this way, it can not only have shock absorption performance, but also actively adjust the support force of the front axle when the pressure device of the elastic connector 7 can adjust its own pressure, so as to subjectively distribute the support force of each axle.

[0064] Similarly, when two front axles are connected to the connecting frame 10, and one of the front axles is floating relative to the connecting frame 10, a limiting structure is also provided on the connecting frame 10 to prevent the floating front axle from being accidentally misaligned in the length and width directions of the frame 1, thereby enhancing the connection stability of the floating front axle.

[0065] As described in the above embodiments, the limiting structure includes a first limiting member 8 and a second limiting member 9. The first limiting member 8 is arranged along the length direction of the frame 1, with one end fixedly connected to the floating front axle and the other end movably connected to the connecting frame 10, so as to float with the floating front axle and prevent the floating front axle from undergoing large misalignment movement in the length direction of the frame 1. Figures 10-12 As shown, taking the flexible connection between the first front axle 2 and the frame 1 as an example, one end of the first limiting member 8 is fixedly connected to the first front axle 2, and the other end is movably connected to the connecting frame 10. This movable connection can be a hinge, for example, through a hinge ball, or through a hinge shaft provided along the width or height direction of the connecting frame 10, so that it can swing with the first front axle 2 in the height direction; it can also be a sliding connection.

[0066] The second limiting member 9 is arranged along the width direction of the frame 1. One end is hinged to the connecting frame 10, and the other end is hinged to the first limiting member 8 or the floating front axle. The axial direction of the hinge shafts at both ends is consistent with the length direction of the frame 1. Therefore, it does not restrict the floating front axle from floating in the height direction, and can prevent the front axle from displacing relative to the frame 1 in the width direction of the frame 1.

[0067] In summary, one embodiment of the dual front axles is a floating configuration, described below: The floating front axle is flexibly connected to a floating connection object (i.e., the vehicle frame or connecting frame) via an elastic connector 7, allowing it to float in the height direction. Simultaneously, a limiting structure is provided on the floating connection object to limit the movement of the floating front axle. The first limiting member 8 of this limiting structure is located along the length direction of the vehicle frame 1, and the second limiting member 9 is located along the width direction of the vehicle frame 1. One end of the first limiting member 8 is fixedly connected to the floating front axle, while the other end is movably connected to the floating connection object, allowing it to float with the floating front axle and limiting its length. One end of the second limiting member 9 is hinged to the floating connection object, and the other end is hinged to either the first limiting member or the floating front axle, allowing it to float with the floating front axle and limiting its width.

[0068] The flexible connector 7 that enables the front axle to float includes a pressure device, such as a buffer cylinder or pneumatic cylinder. In some embodiments, the pressure of the pressure device of the flexible connector 7 is a fixed value and cannot be adjusted. In some embodiments, the pressure device of the flexible connector 7 can adjust the output pressure. This pressure device is connected to the control system of the lifting machinery to actively adjust the support force of the front axle, which is flexibly connected to the frame 1 and floats. In this way, the support force of the front axle can be actively adjusted to adapt to different lifting conditions and to more effectively prevent excessive pressure from causing problems such as difficulty in smooth movement or affecting lifting.

[0069] The boom 5 of the hoisting machinery is telescopic. For example, the boom 5 includes a fixed section and a movable section that is movable relative to the fixed section. The hoisting machinery also includes a first power source, which drives the movable section of the boom 5 to extend and retract to adjust the overall length of the boom 5.

[0070] The overall length of boom 5 can be adjusted by the first power adjustment, and the pitch angle of boom 5 can be adjusted by the pitch power adjustment, so that the load pressure distribution on the front axle and the rear axle 4 can be adjusted.

[0071] The lifting machinery is also equipped with a counterweight 6 and a second power source. The counterweight 6 is movably mounted on the chassis, and the second power source can drive the counterweight 6 to move, thereby adjusting its position along the length of the frame 1. By changing the position of the counterweight 6, the load distribution between the front and rear axles 4 can be adjusted, enhancing the overall stability of the machinery during lifting and transferring loads. For example, when the load on the rear axle 4 is too large, the counterweight 6 is moved closer to the front axle to reduce the pressure on the rear axle 4. If the load on the front axle is too large or its stability is insufficient, the counterweight 6 is moved closer to the rear axle 4 to increase the pressure on the rear axle 4 and decrease the pressure on the front axle.

[0072] In some embodiments, the control system of the hoisting machinery includes a detector assembly for detecting data to calculate the support force of each bridge, thereby monitoring in real time whether the pressure (equivalent to the support force) on each bridge exceeds a preset range and making timely adjustments to ensure the safe operation of the equipment.

[0073] Specifically, the control system includes a controller, a first detector, a second detector, and a third detector. The first detector detects the pitch angle of the boom 5, the second detector detects the length of the boom 5, and the third detector detects the output power of the pitching force that drives the boom to pitch. When the pitching force is a hydraulic cylinder, the controller can detect the pressure value at the output port of the hydraulic cylinder. The controller is communicatively connected to the first, second, and third detectors, receives data from each detector, and obtains the pitch angle, length, and pressure of the pitching force of the boom 5. Then, based on pre-stored distance data between components, such as the distance from the connection point of the boom 5 to the frame 1 along the length of the frame 1 to each axle, the distance between the cylinder of the pitching force and each axle, and the distance between the connection point of the telescopic rod and the boom 5 and the two ends of the boom 5, the controller can calculate the total pressure on the front axle and the pressure on the rear axle 4.

[0074] The controller is electrically connected to both the first power and the pitch power. When the total pressure borne by the front axle, i.e. the total load-bearing capacity of the first front axle 2 and the second front axle 3, or the load-bearing capacity of the rear axle 4, exceeds the preset value, the length of the boom 5 and the pitch angle are adjusted by adjusting the output pressure or speed of the first power and the pitch power, thereby adjusting the load-bearing capacity of the front and rear axles 4.

[0075] In some embodiments, the control system further includes a fourth detector for detecting the position of the counterweight 6 on the chassis. The controller is communicatively connected to the fourth detector and connected to a second power source to adjust the position of the counterweight 6 on the frame 1. When the total load-bearing capacity of the dual front axles or the load-bearing capacity of the rear axle 4 needs adjustment, the control system adjusts the position of the counterweight 6 on the chassis according to a preset program or manually.

[0076] For example, the control system presets the maximum safe value of the total load capacity of the two front axles and the safe value of the load capacity of the rear axle 4. Through the detection of the detector and the calculation of the processor, when the total load capacity of the two front axles or the load capacity of the rear axle 4 exceeds the preset value, the controller automatically starts the second power in time and adjusts the load distribution of the front and rear axles 4 in time by adjusting the position of the counterweight 6, thereby improving the safety and stability of the equipment.

[0077] In a further embodiment, the control system further includes a fifth detector for detecting the support force of the floating front axle. For example, as described in the previous embodiment, if the front axle is connected to the frame 1 via a resilient connector 7, and the resilient connector 7 includes a pressure-adjustable pressure device (e.g., a hydraulic cylinder), the fifth detector can detect the pressure of the pressure device to obtain the support force of the floating front axle. The controller is communicatively connected to the fourth detector and connected to the pressure device to adjust the support force of the floating front axle.

[0078] Specifically, the controller can obtain the support force of the floating front axle based on the detection data of the fifth detector, and then obtain the total support force of the front axle according to the method described in the above embodiment. Thus, the support forces of the first front axle 2 and the second front axle 3 can be clearly defined. Since the pressure device can adjust the output pressure, it can actively adjust the support force of the floating front axle. Thus, the control system can allocate and regulate the support force of the first front axle 2 and the second front axle 3 according to the detection situation, thereby ensuring that the stress on the front axle fixedly connected to the frame 1 is within the preset safety range, and the support force of the floating front axle is adjusted accordingly to prevent the load-bearing capacity from being too large and affecting normal lifting and transportation.

[0079] Each of the aforementioned detectors is specifically configured according to the type of object to be detected. For example, the first detector could be an encoder mounted on the rotating shaft of boom 5, which detects the elevation angle of boom 5 by detecting the rotation angle of the shaft; the second detector could be a length measuring sensor or a laser scanner to obtain the length of boom 5; the third and fifth detectors could both be pressure sensors; and the fourth detector could be a displacement detector or a position detector. Each of the aforementioned power sources could be a hydraulic cylinder, a motor, or a pneumatic cylinder. For example, the pitching power source could be a hydraulic cylinder, and the first and second power sources could be hydraulic cylinders, motors, or pneumatic cylinders.

[0080] In addition to the embodiments described above, this application also provides some embodiments with different structural configurations. For example, in some embodiments, the first front axle 2 and the second front axle 3 are respectively fixedly connected to the connecting frame 10. Specifically, the bridges of the first front axle 2 and the second front axle 3 are both fixedly connected to the connecting frame 10, for example, by welding or by fastening with connecting blocks and fasteners.

[0081] In some embodiments, either the first front axle 2 or the second front axle 3 is hinged to the connecting frame 10 to swing in the width direction of the frame 1, while the other is fixed to the connecting frame 10. With this configuration, the connection between the two front axles and the connecting frame 10 is a three-point connection, which can better ensure the planarity of the three connection points and improve the force balance of the two front axles. At the same time, it can enhance the shock absorption performance of the front axle assembly, better adapt to uneven terrain, and improve the stability when moving under heavy loads.

[0082] For example, in one embodiment, such as Figure 8 and Figure 9 As shown, the first front axle 2 is hinged to the connecting frame 10 via the second hinge shaft 13. Specifically, a support is provided on the bridge of the first front axle 2, and the support is hinged to the connecting frame 10 via the second hinge shaft 13. The axial direction of the second hinge shaft 13 is perpendicular to the axial direction of the first hinge shaft 11, and the axial direction of the second hinge shaft 13 is consistent with the length direction of the frame 1. The second front axle 3 is fixedly connected to the connecting frame 10. In this way, not only can the shock absorption performance be enhanced, but the connection between the two front axles and the connecting frame 10 is a three-point connection, which can better ensure the planarity of the three connection points and improve the force balance of the two front axles.

[0083] Of course, in one embodiment, the first front axle 2 may be fixedly connected to the connecting frame 10, and the second front axle 3 may be hinged to the connecting frame 10.

[0084] The front axle, which is hinged to the frame 1, has a buffer 12 provided between itself and the frame 1 on at least one side of its hinge point in the height direction of the chassis. For example... Figure 8 and Figure 9As shown, this configuration enhances shock absorption performance, preventing the front axle from colliding with the frame 1 during swaying and reducing excessive swaying, thus improving stability. In a preferred embodiment, the front axle hinged to the frame 1 has buffers 12 on both sides of the hinge point. For example, when the first front axle 2 is hinged to the connecting frame 10, and the second front axle 3 is fixed to the connecting frame 10, buffers 12 are provided on the bridge sections of the first front axle 2 located on both sides of the second hinge shaft 13. The buffers 12 are positioned along the chassis height direction, between the bridge and the connecting frame 10. In other words, axially, the middle of the bridge section of the first front axle 2 is hinged to the connecting frame 10 via the second hinge shaft 13, and both ends are flexibly connected to the connecting frame 10 via the buffers 12. The buffers 12 can be any one of rubber buffers, hydraulic buffers, and spring buffers, such as hydraulic springs or pneumatic springs.

[0085] When the connecting frame 10 is hinged to the vehicle frame 1, it is inconvenient for the front axle to be rigidly connected to the engine 16 to establish drive transmission. Therefore, this application also provides an embodiment in which a power unit 14 is provided. This power unit 14 is located at the front axle, flexibly connected to the engine 16, and drively connected to the drive shaft of the first front axle 2 and / or the second front axle 3 to provide driving force to the front axle. The two front axles form a drive axle, while the rear axle 4 is a steering axle. With this configuration, both the stability and flexibility of the chassis are guaranteed.

[0086] The power unit 14 may be provided in one form, which is connected to the drive shaft of the first front axle 2 or to the drive shaft of the second front axle 3.

[0087] Alternatively, the power unit 14 may be provided in two parts, one of which is connected to the drive shaft of the first front axle 2 and the other is connected to the drive shaft of the second front axle 3.

[0088] When a power unit 14 is provided, and provides power to a front axle that is swinging relative to the connecting frame 10 or floating relative to the connecting frame 10, or when two power units are provided, one of which provides power to a front axle that is swinging relative to the connecting frame 10 or floating relative to the connecting frame 10, then the power unit 14 is fixed relative to the front axle, for example, it is fixedly connected to the bridge of the front axle.

[0089] Specifically, when both the first front axle 2 and the second front axle 3 are mounted on the connecting frame 10, and the connecting frame 10 is hinged to the vehicle frame 1, if the power unit 14 provides power to the front axle hinged to the connecting frame 10, then the power unit 14 is relatively fixed to the front axle, that is, it swings with the front axle. For example, it can be fixed to the bridge of the front axle through the connecting seat, thereby establishing a rigid transmission connection with the front axle and maintaining the stability of power transmission. If the power unit 14 provides power to the front axle fixed to the connecting frame 10, then the power unit 14 can be fixed to the connecting frame 10.

[0090] When the first front axle 2 and the second front axle 3 are respectively connected to the frame 1, and one of the front axles is flexibly connected to the connecting frame 10 and is floating in the height direction, if the power unit 14 provides power to the floating front axle, the power unit 14 is fixed relative to the front axle, for example, by connecting the front axle to the bridge via a connecting seat.

[0091] The power unit 14 can be an electric motor or a hydraulic motor. In some embodiments, the power unit 14 is a hydraulic motor, with a hydraulic pump 15 and an engine 16 fixedly connected to the chassis frame 1. The hydraulic pump 15 is connected to the hydraulic motor and supplies oil to it. With this configuration, the chassis is driven by a hydraulic system, and the hydraulic motor is fixed to the front axle, linked to the swing-mounted or floating front axle. This does not affect driving stability and allows for better adaptation to uneven terrain.

[0092] In another aspect, this application also provides a method for adjusting the supporting force of the hoisting machinery described in the above embodiments, the method comprising the following steps:

[0093] Obtain the support force of the fixed front axle and the support force of the rear axle 4, which are fixedly connected to the frame 1;

[0094] Detect whether the support force of the fixed front axle is greater than a first preset value. If it is greater than the first preset value, take a first adjustment measure to make the support force of the fixed front axle less than the first preset value.

[0095] Check whether the support force of the rear axle 4 is within the preset range. If it exceeds the preset range, take a second adjustment measure to bring the support force of the rear axle 4 within the preset range.

[0096] Specifically, the first adjustment measures include any one or any combination of increasing the boom 5 elevation angle, decreasing the boom 5 length, increasing the distance between the counterweight 6 and the front axle, and increasing the support force of the floating front axle.

[0097] The second adjustment measures include any one or any combination of adjusting the boom 5 elevation angle, adjusting the boom 5 length, adjusting the distance between the counterweight 6 and the front axle, and adjusting the supporting force of the floating front axle.

[0098] like Figure 13 In the flowchart shown, in a preferred embodiment, step S01 can be executed first to compare the support force of the front axle fixed to the frame 1. When the support force of the front axle is greater than the first preset value N2max, the support force, i.e. the load-bearing capacity, of the front axle is reduced by the first measure. When the support force of the front axle is less than the first preset value, the next step S02 is executed.

[0099] S02, check if the support force of the rear axle 4 is greater than the second preset value. The second preset value is the minimum load-bearing capacity N3min of the rear axle 4. If it is less than the second preset value, increase the boom 5 elevation angle and / or decrease the boom 5 length, and / or increase the distance between the counterweight 6 and the front axle, and / or increase the support force of the floating front axle to increase the support force of the rear axle 4 so that it is greater than the second preset value. When the support force of the rear axle 4 is greater than the second preset value, proceed to the next step S03.

[0100] S03, check if the support force of the rear axle 4 is less than the third preset value. The third preset value is the maximum pressure N3max that the rear axle 4 can withstand. If the support force is greater than the third preset value, decrease the boom 5 elevation angle and / or increase the boom 5 length, and / or decrease the distance between the counterweight 6 and the front axle, and / or decrease the support force of the floating front axle to reduce the support force of the rear axle 4 so that it is less than the third preset value. When the support force of the rear axle 4 is less than the third preset value, return to the first step S01.

[0101] Of course, in some embodiments, the above steps S01, S02, and S03 can be executed simultaneously or in parallel, without any order.

[0102] When the support force of each bridge meets the preset conditions, step S04 can be executed. The operator can actively adjust the boom 5 elevation angle, boom 5 length, counterweight 6 position and the support force of the floating front bridge according to the working conditions to actively distribute the load-bearing capacity of each bridge.

[0103] In some embodiments, for each comparison of values, a prompt message can be issued when the judgment result is negative. For example, when the support force of the front axle fixedly connected to the frame 1 is greater than a first preset value N2max, a first prompt message is issued; when the support force of the rear axle 4 is less than a second preset value N3min, a second prompt message is issued; and when the support force of the rear axle 4 is greater than a third preset value N3max, a third prompt message is issued. The first, second, and third prompt messages can be different, for example, different colored lights or different warning sounds, to facilitate signal differentiation.

[0104] In some embodiments, the adjustment method further includes the following:

[0105] S00, obtain the output pressure of the pitching power, the elevation angle of the boom 5, the length of the boom 5, and the supporting force of the floating front axle, and obtain the bearing capacity of the rear axle 4 and the total bearing capacity of the front axle based on the output pressure of the pitching power, the elevation angle of the boom 5 and the length of the boom 5.

[0106] The support force of the front axle fixed to the frame 1 is obtained based on the total load-bearing capacity of the front axle and the support force of the floating front axle.

[0107] In this way, through the cooperation of the detector and the controller, the above data can be automatically acquired and the force can be automatically monitored. When the preset conditions are not met, the control system automatically adjusts the output of the corresponding power. By changing the boom 5 elevation angle, boom 5 length, counterweight 6 position and the support force of the floating front axle, the support force distribution of each front axle and rear axle 4 can be adjusted, thereby improving the monitoring force and load adjustment capability of the equipment operation and improving the operational safety and stability of the equipment.

[0108] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0109] The components and devices described in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the accompanying drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the words “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0110] It should also be noted that in the apparatus and method of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0111] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0112] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0113] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hoisting machine characterized in that, The chassis includes a frame, a first front axle and a second front axle connected to the frame, the first front axle and the second front axle being independently mounted on the frame, or the first front axle and the second front axle forming a modular front axle assembly, the front axle assembly being connected to the frame; Either the first front axle or the second front axle is flexibly connected to the frame or the connecting frame of the front axle assembly via an elastic connector to float in the height direction, while the other is fixedly connected to the frame or the connecting frame. Along the length of the vehicle frame, the connection point between the pitch force and the vehicle frame is located between the first front axle and the second front axle; The resilient connector has a pressure device capable of adjusting the output pressure, which is connected to the control system to adjust the support force of the floating front axle. The chassis is provided with a counterweight that is movable on the frame and a second power that drives the counterweight to move, so as to adjust the position of the counterweight in the longitudinal direction of the chassis; The control system includes: The first detector detects the pitch angle of the boom; The second detector detects the length of the boom; The third detector detects the output pressure of the pitching force that drives the boom to pitch and rotate. The fourth detector detects the position of the counterweight on the chassis; The fifth detector detects the support force of the floating front axle; The controller is communicatively connected to each detector and is also connected to the pitch power and the first power for adjusting the telescopic length of the boom. The controller is communicatively connected to the fourth and fifth detectors, and is also connected to the second power source and the pressure device to adjust the support force of the floating front axle and the position of the counterweight.

2. The hoisting machine of claim 1, wherein The connecting frame of the front axle assembly is hinged to the vehicle frame to swing in the length direction of the vehicle frame, and both the first front axle and the second front axle are connected to the connecting frame.

3. The overhead hoist system of claim 1, wherein, A limit structure is provided between the floating front axle and the floating connection object to prevent the floating front axle from misaligning in the length and width directions of the frame.

4. The hoisting machinery as described in claim 3, characterized in that, The limiting structure includes: The first limiting member is arranged along the length of the vehicle frame, with one end fixedly connected to the floating front axle and the other end movably connected to the floating connection object, so as to float with the floating front axle and limit the floating front axle. The second limiting member is arranged along the width direction of the vehicle frame. One end is hinged to the floating connection object, and the other end is hinged to the first limiting member or the floating front axle, so as to float with the floating front axle and limit the floating front axle.

5. The hoisting machinery as described in claim 1, characterized in that, Either the first front axle or the second front axle is hinged to the connecting frame to swing in the width direction of the vehicle frame, while the other is fixed to the connecting frame.

6. A method for adjusting support force, characterized in that, Applicable to the hoisting machinery as described in any one of claims 1-5, the method comprises the following: Obtain the support force of the front axle and the support force of the rear axle, which are fixedly connected to the vehicle frame; Detect whether the support force of the fixedly connected front axle is greater than a first preset value. If it is greater than the first preset value, take a first adjustment measure to make the support force of the fixedly connected front axle less than the first preset value. The system detects whether the support force of the rear axle is within a preset range. If it exceeds the preset range, a second adjustment measure is taken to bring the support force of the rear axle within the preset range.

7. The support force adjustment method as described in claim 6, characterized in that, Also includes the following: The output pressure of the pitching force, the boom elevation angle and boom length of the crane boom, and the supporting force of the floating front axle are obtained. Based on the output pressure, boom elevation angle and boom length, the bearing capacity of the rear axle and the total bearing capacity of the front axle are obtained. The support force of the front axle fixed to the frame is obtained based on the total load-bearing capacity of the front axle and the support force of the floating front axle.

8. The support force adjustment method as described in claim 6, characterized in that, The first adjustment measures include any one or any combination of increasing the boom elevation angle, decreasing the boom length, increasing the distance between the counterweight and the front axle, and increasing the support force of the floating front axle. The second adjustment measure includes any one or any combination of adjusting the boom elevation angle, adjusting the boom length, adjusting the distance between the counterweight and the front axle, and adjusting the support force of the floating front axle.

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