Crawler-type fork crane

Abstract

The invention relates to the technical field of special vehicle manufacturing, in particular to a crawler-type fork crane which comprises a vehicle body, and a crawler assembly is arranged on the lower portion of the vehicle body. The fork lifting device is mounted on one side of the vehicle body, and the fork lifting device is used for driving goods to do lifting motion; the hoisting device is rotationally mounted at the upper end of the vehicle body and is used for driving the cargoes to move in different directions and to ascend and descend in a larger amplitude; the supporting leg mechanism comprises a plurality of supporting legs, the supporting legs can stretch out and draw back in the vertical direction, the lower end faces of the supporting legs are connected with air bags, and each supporting leg is provided with an air pump for inflating and deflating the air bags. The fork crane has the advantages that the operation steps of the fork crane during operation are simplified, and then the efficiency of engineering operation is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of special vehicle manufacturing, and in particular to a crawler forklift. Background Art

[0002] The forklift is a modified internal combustion forklift by adding a lifting device and outrigger structure. It can not only carry goods, but also perform lifting operations, realizing the dual functions of loading and unloading and lifting. This equipment avoids the need for multiple devices to cooperate in traditional operations, thereby greatly improving operating efficiency.

[0003] The forklift mainly includes a body, a lifting device, a fork lifting device and an outrigger mechanism, etc. The lifting device is foldably installed on the upper end surface of the body, the fork lifting device is installed on the front side of the body, and the outrigger mechanism is installed on the body. When the forklift works on soft land, the soft land will deform and sink due to the pressure of the outriggers, thereby causing the body to be in a tilted state, greatly increasing the risk of the body rolling over. The solution to this problem in the prior art is to place a large-area pad under the supporting legs to increase the force-bearing area, reduce the ground pressure, and thus try to avoid the soft land from deforming and sinking due to the pressure of the outriggers.

[0004] However, in the above technology, when the forklift needs to operate on soft land, the forklift may need to be moved according to the actual working conditions. After the forklift moves, the staff needs to move the pad to the designated position again. As the position of the forklift changes continuously, the staff needs to continuously move the pad, which not only consumes a lot of manpower but also greatly reduces the efficiency of the engineering operation. Summary of the invention

[0005] The purpose of the present application is to provide a crawler forklift, which can avoid the repeated transportation of pads as much as possible, thereby simplifying the operating steps of the forklift during operation, and thus greatly improving the efficiency of engineering operations.

[0006] The crawler forklift provided in this application adopts the following technical solution: The vehicle body has a track assembly disposed at the lower part; A fork lifting device is installed on one side of the vehicle body, and is used to drive the cargo to perform lifting movement; A lifting device is rotatably mounted on the upper end of the vehicle body, and is used to drive the cargo to move in different directions and to perform a greater degree of lifting and lowering motion; The leg mechanism comprises a plurality of legs, all of which can be extended and retracted in a vertical direction, and the lower end surfaces of the plurality of legs are connected with air bags, and each leg is provided with an air pump for inflating and deflating the air bags.

[0007] Optionally, a receiving groove for accommodating an airbag is formed on the lower end surface of the support leg, and the air inlet on the airbag is fixedly connected to the groove wall of the receiving groove. The air pump is located in the receiving groove. When the air pump is inflated, the airbag extends out of the receiving groove due to expansion. When the air pump is deflating, the airbag is sucked into the receiving groove because the receiving groove is in a negative pressure state.

[0008] Optionally, when the airbag is in an expanded state, the shape of the airbag is flat.

[0009] Optionally, a detection component for detecting the air pressure in the airbag is arranged in the accommodating groove.

[0010] Optionally, the leg is also provided with an adjustment component for adjusting the telescopic length of the leg, and the adjustment component is electrically connected to the detection component.

[0011] Optionally, a monitoring component is provided at the center of gravity when the vehicle body is in a horizontal state, and the monitoring component can monitor the tilt direction and tilt angle of the vehicle body in real time, and the monitoring component is electrically connected to the adjustment component.

[0012] Optionally, the monitoring component includes a monitoring box, which is arranged at the center of gravity of the vehicle body. A monitoring groove is opened in the monitoring box. The number of groove walls along the vertical direction of the monitoring groove corresponds one to one to the number of legs, and pressure sensors are arranged on multiple groove walls. A monitoring ball is hung in the monitoring groove.

[0013] Optionally, the monitoring ball abuts against a plurality of groove walls arranged in the vertical direction simultaneously.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the forklift needs to perform lifting operations on soft land, the airbag is first inflated by an air pump to expand and increase the volume of the airbag, and then the forklift is driven to the work site to extend the legs until the airbag on the legs touches the ground. When the work site needs to be changed, the legs are shortened to drive the airbag to rise into the air, and then the forklift moves. When the forklift moves to another work site, the legs are extended until the airbag touches the ground. Through the airbag and operation method in this embodiment, the staff does not need to perform repeated pad handling work, which greatly saves manpower and improves work efficiency. At the same time, the airbag has better elasticity than the pad. On the one hand, the elasticity of the airbag itself can buffer part of the pressure from the legs, thereby reducing the pressure of the airbag on the ground, thereby reducing the probability of the airbag sinking on soft land. On the other hand, the elasticity of the airbag itself enables it to better fit the uneven ground, thereby increasing the contact area between the airbag and the ground, further reducing the pressure of the airbag on the ground, thereby further reducing the probability of the airbag sinking on soft land. 2. The setting of the receiving groove facilitates the installation and accommodation of the airbag and the air pump. The initial state of the airbag is contracted in the receiving groove. When the airbag is needed, the air pump is inflated, the airbag expands, and is ejected from the receiving groove; when the airbag is no longer needed, the air pump is evacuated, the gas in the airbag is lost and contracts, and because the gas in the receiving groove is also evacuated, the receiving groove is in a negative pressure state, so that the contracted airbag is sucked into the receiving groove, realizing the automatic storage of the airbag; 3. The setting of the pressure sensor can detect in real time whether the airbag is in a damaged state, so that the staff can replace the damaged airbag in time; 4. The coordinated arrangement of the pressure sensor and the adjustment component can monitor the pressure in the airbags on each leg in real time. When the pressure in one of the airbags increases from the initial value to a certain value, and then remains unchanged for a certain period of time, and then suddenly the pressure in the airbag continues to increase, it means that the leg corresponding to the airbag is located on relatively soft ground. After the airbag touches the soft ground first, its internal pressure increases. However, since the ground is relatively soft, the airbag can continue to sink, so that the comprehensive external force it receives will not increase significantly, so its internal pressure will not increase. When the airbag does not continue to sink, the airbag will be subjected to the pressure of the leg, and its internal pressure will continue to increase. Therefore, when the control center detects that the internal pressure of the airbag on one of the legs changes in this way, it means that the airbag is sinking, and the height of the corresponding leg is lower than that of the other legs. The control center extends the leg through the adjustment component to try to ensure that the body corresponding to the leg is kept at the same height as the body corresponding to the other legs, thereby ensuring the balance and stability of the body and reducing the risk of the body rolling over. 5. The coordinated use of the detection component and the monitoring component, on the one hand, the dual protection system of the detection component and the monitoring component can enable the system to more accurately determine whether the vehicle body is tilted, greatly reducing the occurrence of detection or monitoring errors; on the other hand, the pressure data in the airbag detected by the detection component on one of the legs has been at the initial value, and when the monitoring component detects that the vehicle body is tilting toward the direction of the leg, it means that the airbag under the leg is in a suspended state, which means that the ground corresponding to the leg may have partially collapsed. At this time, the vehicle body is in a relatively dangerous area. The driver can drive away or put down heavy objects immediately according to the corresponding signal display to avoid risks safely. Therefore, on the whole, the simultaneous setting of the detection component and the monitoring component greatly improves the accuracy of the detected data and the driver's escape probability in unexpected situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the supporting legs in an embodiment of the present application; Figure 3 is a schematic diagram of the structure of the monitoring component in the embodiment of the present application; In the figure, 1. vehicle body; 2. fork lifting device; 3. lifting device; 4. outrigger mechanism; 41. outrigger; 411. receiving slot; 42. airbag; 43. air pump; 6. detection component; 7. adjustment component; 8. monitoring component; 81. monitoring box; 811. monitoring slot; 82. monitoring ball; 83. pressure sensor. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-3 , further details of this application are given.

[0017] A crawler forklift, referring to Figure 1 and Figure 2 , including a vehicle body 1, a fork lifting device 2, a lifting device 3 and an outrigger mechanism 4.

[0018] The forklift device 2 in this embodiment is installed at the front end of the vehicle body 1, the lifting device 3 is rotatably installed on the upper end surface of the vehicle body 1, and the lower end surface of the vehicle body 1 is provided with a crawler. The leg mechanism 4 in this embodiment includes a plurality of legs 41. In this embodiment, there are four legs 41. Of course, in other optional implementations, the specific number of legs 41 depends on the specific situation. The four legs 41 in this embodiment are respectively arranged at the four corners of the vehicle body 1, and each leg 41 can perform independent telescopic movement. The vehicle body 1 is provided with four adjustment components 7 for driving the legs 41 to perform telescopic movement. The four adjustment components 7 correspond to the four legs 41 one by one. The adjustment components 7 in this embodiment are arranged as hydraulic cylinders. The lower end surface of each leg 41 is connected to an air bag 42, and each leg 41 is provided with an independent air pump 43 for inflating and exhausting the air bag 42.

[0019] When the forklift needs to perform lifting operations on soft ground, all air pumps 43 are first started to inflate the corresponding air bags 42, all air bags 42 are expanded and increased in volume, and then the forklift is driven to the designated area, and the four legs 41 are extended by adjusting the assembly 7 until the air bags 42 at the lower ends of the legs 41 are in contact with the ground. The volume of the inflated air bags 42 becomes larger, and the contact area between the air bags 42 and the ground is larger than the contact area between the bottom of the legs 41 and the ground, thereby increasing the force-bearing area of ​​the legs 41 and reducing the ground pressure, thereby avoiding the deformation and sinking of the soft land due to the inability to withstand the pressure of the legs 41. Therefore, the air bags 42 in this embodiment are also arranged to be flat. When the air bags 42 are inflated, the lower end surface of the air bags 42 has a larger area, further increasing the air bags 42. The contact area between the airbag 42 and the ground; when it is necessary to change the working location, it is only necessary to retract the support leg 41 through the adjusting component 7 to drive the airbag 42 to move up into the air, and then drive the forklift to another designated location, and then extend the support leg 41 through the adjusting component 7 until the airbag 42 at the lower end of the support leg 41 abuts against the ground. During the whole process, the staff does not need to repeatedly carry the pad, which greatly saves manpower and improves work efficiency; and when there is no need to carry out lifting operations, the gas in the airbag 42 is evacuated through the air pump 43, and the airbag 42 will shrink. The volume of the shrunken airbag 42 is small, and the space occupied is not wrong, so it will not affect other operations of the forklift, and the airbag 42 does not need to be carried and stored manually, which further reduces the work intensity of the staff.

[0020] At the same time, the airbag 42 in this embodiment has better elasticity than the pad. Therefore, when the support leg 41 applies pressure to the airbag 42, the elasticity of the airbag 42 itself can buffer part of the pressure from the support leg 41, thereby reducing the pressure of the airbag 42 on the ground, and further reducing the probability of the airbag 42 sinking on soft ground. On the other hand, due to the elasticity of the airbag 42 itself, the airbag 42 can deform better than the pad, so that it can better fit the uneven ground, thereby increasing the contact area between the airbag 42 and the ground, further reducing the pressure of the airbag 42 on the ground, and further reducing the probability of the airbag 42 sinking on soft ground.

[0021] It should be noted that the load of the high-quality airbag 42 in the current technology can reach about 40 tons, while the current weight of small and medium-sized crawler forklifts is about 20 tons, and the maximum load of small and medium-sized crawler forklifts is also about 20 tons. In this embodiment, four high-quality airbags 42 are used, which are fully capable of providing auxiliary support for small and medium-sized crawler forklifts. Therefore, in actual applications, there is no need to worry about the airbag 42 being damaged due to being unable to withstand the pressure.

[0022] In this embodiment, the lower ends of the four legs 41 are each provided with a receiving groove 411 for receiving the airbag 42. The airbag 42 is fixedly connected to the groove wall of the receiving groove 411, and the air inlet of the airbag 42 is connected to the receiving groove 411. The air pump 43 is located in the receiving groove 411. The airbag 42 is initially located in the receiving groove 411. When the forklift needs to perform forklift operations on soft ground, the air pump 43 is started to inflate the airbag 42. The gas output by the air pump 43 enters the airbag 42 through the receiving groove 411, and then the airbag 42 is expanded. , and is ejected from the containing groove 411. As the air pump 43 continues to output, the airbag 42 continues to grow until the airbag 42 is fully expanded, thereby facilitating subsequent support work; when the lifting operation is not required, the air pump 43 is started to evacuate the airbag 42, and the gas in the airbag 42 will first enter the containing groove 411, and then be extracted by the air pump 43. After the gas in the airbag 42 is evacuated, the airbag 42 will shrink, and because the gas in the airbag 42 first enters the containing groove 411 and then flows away by the air pump 43, the gas When the airbag 42 is contracted, it will contract in the direction close to the receiving groove 411. When the gas in the receiving groove 411 is exhausted, the airbag 42 will be pressed into the receiving groove 411 under the action of the external atmospheric pressure. Therefore, during the use of the airbag 42, the airbag 42 can be automatically expanded and automatically stored, and the staff does not need to perform additional storage work, thereby further reducing the staff's work intensity; at the same time, the setting of the receiving groove 411 allows the airbag 42 to be stored inside the leg 41. On the one hand, the receiving groove 411 can On the other hand, when the forklift is operating on land of normal hardness, there is no need to worry about the outrigger 41 sinking due to the small contact area between the outrigger 41 and the ground. Therefore, the airbag 42 will not be located between the airbag 42 and the ground. Therefore, the airbag 42 will not affect the supporting work of the outrigger 41. At the same time, it also avoids the airbag 42 in the uninflated state from being damaged due to excessive squeezing and friction with the ground and the outrigger 41.

[0023] Secondly, refer to Figure 2 and Figure 3 In this embodiment, a detection component 6 for detecting the internal pressure of the airbag 42 is arranged in the receiving groove 411.

[0024] The detection component 6 in this embodiment is configured as an air pressure sensor. When the air pump 43 inputs a certain amount of gas into the airbag 42, a certain air pressure will exist in the airbag 42. If the air pressure sensor detects that the air pressure in the airbag 42 continues to drop until the air pressure in the airbag 42 drops to the same as the atmospheric pressure, it means that the airbag 42 is damaged at this time. The air pressure sensor will transmit this signal to the control center, and the control center will issue a corresponding alarm so that the staff can repair or replace the damaged airbag 42 in time.

[0025] At the same time, the detection component 6 in this embodiment can also be used in conjunction with the adjustment component 7. The adjustment component 7 in this embodiment is configured as a hydraulic cylinder, and the leg 41 is the output end of the hydraulic cylinder. When the forklift is performing a lifting operation on a soft ground, the air pumps 43 on the four legs 41 will be started at the same time to inflate the corresponding air bags 42. When the air pressure sensor detects that the pressure in the air bag 42 reaches a certain value, the air pump 43 stops inflating, and then the control center starts the hydraulic cylinders on the four legs 41 at the same time, and the output end of the hydraulic rod extends until the air bag 42 at the bottom of the leg 41 abuts against the ground. At this time, since the air bag 42 abuts against the ground , the ground will exert pressure on the airbag 42, so that the airbag 42 will be squeezed. After being squeezed, the volume of the airbag 42 will decrease, so that the pressure in the airbag 42 will increase. Because the airbag 42 on one of the legs 41 is in contact with soft ground, the soft ground cannot withstand the pressure of the airbag 42 and gradually sinks. At this time, the airbag 42 is under pressure from the ground and the legs 41, but the airbag 42 can continue to move downward, indicating that the comprehensive external force it is subjected to is still downward. At the same time, because one of the legs 41 continues to move downward, it means that the body 1 of the forklift is tilted to a certain extent at this time, and the tilt direction is directly opposite to the sunken leg 41, and When the airbag 42 moves downward after contacting the ground, the volume of the airbag 42 may remain unchanged or slightly decrease, because the pressure detected by the air pressure sensor in the airbag 42 does not change or slightly increases. When the leg 41 no longer moves downward, the vehicle body 1 tilts, and the center of gravity of the vehicle body 1 moves in the direction close to the tilt of the vehicle body 1. Therefore, the leg 41 corresponding to the direction will be subject to more pressure from the vehicle body 1, and the airbag 42 corresponding to the leg 41 will also be subject to more pressure. Therefore, if the pressure in the airbag 42 detected by the air pressure sensor increases from a normal value at the beginning, then the airbag 42 When the pressure value in 42 is in a constant state or a slightly changing state, and finally rises suddenly, it means that the ground corresponding to the airbag 42 and the support leg 41 sinks, and then the control center will control the hydraulic cylinder corresponding to the support leg 41 to extend. After the support leg 41 is extended, on the one hand, it can drive the airbag 42 to continue to move downward, and then the airbag 42 will compact the soft land to a certain extent, so as to avoid the support leg 41 and the airbag 42 from continuing to move downward, and then avoid the vehicle body 1 from continuing to tilt, thereby greatly reducing the probability of the vehicle body 1 rolling over as a whole, and greatly improving safety.

[0026] Furthermore, since there is a critical value for the load that the airbag 42 can withstand, the hydraulic cylinder cannot extend indefinitely, and the air pressure sensor can always detect the pressure in the airbag 42. The greater the load borne by the airbag 42, the greater the air pressure in the airbag 42. Therefore, in the process of the hydraulic cylinder driving the support leg 41 to extend, the air pressure in the airbag 42 will also be greater. Therefore, a preset value can be set in the control center. The preset value is less than the critical value of the load of the airbag 42. When the air pressure in the airbag 42 reaches this preset value, the hydraulic cylinder will no longer extend. When the extension of the hydraulic cylinder stops, the support leg 41 is in a state that will not crush the airbag 42, and at the same time can bear the maximum weight of the forklift. The entire system has a high degree of automation and does not require excessive monitoring by staff, which greatly improves the practicality of the present application.

[0027] In addition, a monitoring component 8 is further provided on the vehicle body 1 in the present embodiment. The monitoring component 8 in the present embodiment includes a monitoring box 81. The monitoring box 81 is provided at the center of gravity when the vehicle body 1 is in a horizontal state. A monitoring slot 811 is provided inside the monitoring box 81. The monitoring slot 811 in the present embodiment is provided in a rectangular parallelepiped shape, and the monitoring slot 811 is arranged in a vertical direction. The four slot walls arranged in the vertical direction in the monitoring slot 811 correspond to the four legs 41 one by one, and the four slot walls arranged in the vertical direction in the monitoring slot 811 are arranged in the direction of the corresponding legs 41, respectively. A monitoring ball 82 is provided in the monitoring slot 811. The monitoring ball 82 is suspended on the slot wall at the upper end of the monitoring slot 811 by a rope. The monitoring ball 82 is in contact with the four slot walls arranged along the vertical direction in the monitoring slot 811 at the same time. Pressure sensors 83 are provided on the four slot walls arranged along the vertical direction in the monitoring slot 811. When the vehicle body 1 is in a horizontal state, the rope on the monitoring ball 82 is in a vertical state, and there is no force interaction between the monitoring ball 82 and the four slot walls arranged along the vertical direction in the monitoring slot 811. The four pressure sensors 83 are all electrically connected to the control center.

[0028] When the vehicle body 1 is in a tilted state, the center of gravity of the vehicle body 1 will change, so the monitoring ball 82 will tend to move in the direction close to the new center of gravity. However, since the monitoring ball 82 abuts against the groove walls of the four monitoring grooves 811 arranged in the vertical direction, and when the vehicle body 1 is in a tilted state, the groove walls of the four monitoring grooves 811 arranged in the vertical direction will also change from a vertical state to a tilted state, and the monitoring ball 82 will generate a squeezing force on the groove wall with the lowest terrain among the four groove walls, and the pressure sensor 83 on the groove wall can measure the corresponding data, and then the pressure sensor 83 transmits the data to the control center, and the control center can understand the vehicle body 1 according to which groove wall uploads the data. In which direction the vehicle body 1 is tilted, the control center then starts the hydraulic cylinder on the leg 41 corresponding to the groove wall to extend and retract. Although its role is similar to that of the detection component 6, in actual use, these two methods can be used to simultaneously determine in which direction the vehicle body 1 is tilted. If the data displayed by the pressure sensor 83 and the air pressure sensor both show that the vehicle body is tilted in the same direction, the judgment result generated has higher accuracy, thereby avoiding as much as possible the control center's wrong judgment due to data errors, failing to start the hydraulic cylinder on the corresponding leg 41 in time, or starting the hydraulic cylinder on the wrong leg 41, which in turn causes the vehicle body 1 to roll over.

[0029] At the same time, the detection component 6 in this embodiment can detect in which direction the vehicle body 1 is tilted, and the monitoring component 8 can also monitor which component the vehicle body 1 is tilted towards. When the monitoring component 8 detects that the vehicle body 1 is tilting in one direction, and the air pressure in the airbag 42 on the leg 41 corresponding to that direction in the detection component 6 has not changed and has remained at the initial value, it means that the leg 41 corresponding to the tilting direction may be in a suspended state, that is, the ground directly below the leg 41 may have partially collapsed, and therefore the local area is not suitable for lifting operations. Upon receiving the signal, the control center rotates the lifting device 3 to adjust the center of gravity of the vehicle body 1, and then drives away from the area as soon as possible, thereby further ensuring the safety of the staff.

[0030] Furthermore, the pressure sensor 83 in this embodiment can also determine the tilt angle of the vehicle body 1 according to the value measured by the pressure sensor 83. The main calculation principle is to use trigonometric functions for calculation. Since the pressure on the pressure sensor 83 comes from the monitoring ball 82, the pressure exerted by the monitoring ball 82 on it is a component of its own gravity. Therefore, the trigonometric function can be used to calculate how much the rope hanging the monitoring ball 82 is tilted, that is, how much the groove wall of the monitoring groove 811 is tilted, thereby obtaining how much the vehicle body 1 is tilted. In actual applications, there is a critical value for the angle at which the vehicle body 1 can tilt. , exceeding this critical value, the vehicle body 1 is very likely to roll over. Therefore, a preset value can be set in the control center, and this preset value should be smaller than the critical value. When the tilt angle of the vehicle body 1 reaches this preset value, the control center will sound an alarm, and then the staff will immediately stop the lifting operation, and can adjust the center of gravity of the vehicle body 1 to the direction opposite to the tilt direction by rotating the lifting device 3, and then immediately start the forklift and drive the forklift away from the location. The monitoring component 8 can generally avoid the risk of the vehicle body 1 rolling over, thereby further greatly improving the safety of the forklift.

[0031] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A crawler forklift, characterized in that: include: A vehicle body (1) having a track assembly disposed at the lower part; A fork lifting device (2) is installed on one side of the vehicle body (1), and the fork lifting device (2) is used to drive the cargo to perform lifting movement; A lifting device (3) is rotatably mounted on the upper end of the vehicle body (1), and the lifting device (3) is used to drive the cargo to move in different directions and to perform a greater lifting movement; The leg mechanism (4) comprises a plurality of legs (41), the plurality of legs (41) are capable of being extended and retracted in a vertical direction, the lower end surfaces of the plurality of legs (41) are connected to air bags (42), and each leg (41) is provided with an air pump (43) for inflating and deflating the air bags (42).

2. A crawler forklift according to claim 1, characterized in that: The lower end surface of the support leg (41) is provided with a receiving groove (411) for receiving the airbag (42); the air inlet on the airbag (42) is fixedly connected to the groove wall of the receiving groove (411); the air pump (43) is located in the receiving groove (411); when the air pump (43) is inflated, the airbag (42) extends out of the receiving groove (411) due to expansion; when the air pump (43) is deflating, the airbag (42) is sucked into the receiving groove (411) because the receiving groove (411) is in a negative pressure state.

3. The crawler forklift according to claim 1, characterized in that: When the airbag (42) is in an expanded state, the shape of the airbag (42) is flat.

4. A crawler forklift according to claim 2, characterized in that: A detection component (6) for detecting the air pressure in the airbag (42) is arranged in the containing groove (411).

5. The crawler forklift according to claim 4, characterized in that: The supporting leg (41) is also provided with an adjusting component (7) for adjusting the telescopic length of the supporting leg (41), and the adjusting component (7) is electrically connected to the detecting component (6).

6. The crawler forklift according to claim 5, characterized in that: A monitoring component (8) is arranged at the center of gravity of the vehicle body (1) when the vehicle body (1) is in a horizontal state. The monitoring component (8) is capable of monitoring the tilt direction and tilt angle of the vehicle body (1) in real time. The monitoring component (8) is electrically connected to the adjustment component (7).

7. The crawler forklift according to claim 6, characterized in that: The monitoring assembly (8) comprises a monitoring box (81), the monitoring box (81) being arranged at the center of gravity of the vehicle body (1), the monitoring box (81) being provided with a monitoring slot (811), the number of slot walls of the monitoring slot (811) along the vertical direction corresponding to the number of the legs (41), and pressure sensors (83) being arranged on the plurality of slot walls, and a monitoring ball (82) being suspended in the monitoring slot (811).

8. The crawler forklift according to claim 7, characterized in that: The monitoring ball (82) simultaneously abuts against a plurality of groove walls arranged in the vertical direction.

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