Chassis and Construction Machinery

Abstract

The present invention relates to the technical field of construction machinery, and provides a chassis and a construction machinery. The chassis includes a first vehicle frame, a second vehicle frame, a positioning member and a connecting member. The first vehicle frame is used for installing a first power unit capable of providing driving power, and the second vehicle frame is used for installing an upper mounting platform. The first vehicle frame and the second vehicle frame are connected end to end and overlap with each other. The first vehicle frame and the second vehicle frame are detachably connected by the connecting member. The connecting member is used to bear the load perpendicular to the overlapping surface of the first vehicle frame and the second vehicle frame. The positioning member is arranged between the first vehicle frame and the second vehicle frame and is used to bear the load parallel to the overlapping surface of the first vehicle frame and the second vehicle frame. When the chassis provided by the present invention is in road transportation, the first vehicle frame and the second vehicle frame can be disassembled to transport the first vehicle frame and the second vehicle frame separately, so as to reduce the size of the chassis and further reduce the difficulty of road transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly to a chassis and a construction machinery. Background Art

[0002] With the improvement of the lifting capacity of construction machinery such as cranes, it is necessary to increase the length and width dimensions of the chassis of the construction machinery to ensure the bearing capacity and stability of the chassis. With the increase of the chassis size, the difficulty of the construction machinery in transferring and transporting on the road will also increase, resulting in an increase in the transportation cost of the construction machinery. Summary of the Invention

[0003] The present invention provides a chassis and a construction machinery to solve the defect in the prior art that with the increase of the chassis size, the difficulty of the construction machinery in transferring and transporting on the road will also increase, resulting in an increase in the transportation cost of the construction machinery, and to achieve the effect of reducing the difficulty of the construction machinery in road transportation.

[0004] The present invention provides a chassis, including a first vehicle frame, a second vehicle frame, a positioning member and a connecting member. The first vehicle frame is used to install a first power unit capable of providing driving power. The second vehicle frame is used to install an upper mounting platform. The first vehicle frame and the second vehicle frame are connected end to end and overlap with each other. The first vehicle frame and the second vehicle frame are detachably connected by the connecting member. The connecting member is used to bear the load perpendicular to the overlapping surface of the first vehicle frame and the second vehicle frame. The positioning member is arranged between the first vehicle frame and the second vehicle frame and is used to bear the load parallel to the overlapping surface of the first vehicle frame and the second vehicle frame.

[0005] According to the chassis provided by the present invention, the positioning member includes a prism. One of the first vehicle frame and the second vehicle frame is provided with the prism, and the other is provided with a polygonal hole for the prism to be inserted into. By the cooperation of the prism and the polygonal hole, the movement parallel to the overlapping surface of the first vehicle frame and the second vehicle frame between the first vehicle frame and the second vehicle frame can be restricted.

[0006] According to the chassis provided by the present invention, the positioning member includes a positioning pin. One of the first vehicle frame and the second vehicle frame is provided with at least two positioning pins, and the other is provided with positioning holes corresponding to the positioning pins. By arranging at least two positioning pins on the overlapping surface of the first vehicle frame and the second vehicle frame, the movement parallel to the overlapping surface of the first vehicle frame and the second vehicle frame between the first vehicle frame and the second vehicle frame can also be restricted.

[0007] A chassis provided according to the present invention, one end of the second frame connected to the first frame is provided with a lapping plate, the lapping plate is lapped on the top of the first frame, the positioning member is arranged between the first frame and the lapping plate, and the connecting member connects the second frame and the lapping plate. By providing the lapping plate for transition, it is convenient to connect the first frame and the second frame.

[0008] A chassis provided according to the present invention, the connecting member includes a threaded connecting member, one of the first frame and the second frame is provided with a through hole for the threaded connecting member to pass through, and the other is provided with a threaded hole opposite to the through hole and threadedly engaged with the threaded connecting member. With such a setting, it is convenient to connect and disassemble the first frame and the second frame.

[0009] A chassis provided according to the present invention, the number of the threaded connecting members is multiple, the multiple threaded connecting members are arranged in sequence to form an annular structure, and the positioning member is arranged inside the annular structure. With such a setting, the connection strength between the first frame and the second frame is higher.

[0010] A chassis provided according to the present invention, the upper mounting platform includes a slewing bearing, and the installation position of the slewing bearing on the second frame is arranged at one end of the second frame close to the first frame.

[0011] The present invention also provides a working machine, including a first power unit, an upper mounting platform and the chassis as described above.

[0012] A working machine provided according to the present invention further includes a second power unit and a hydraulic motor, the second power unit is arranged on the upper mounting platform, the second power unit is connected to the hydraulic motor and can drive the hydraulic motor to rotate, the hydraulic motor is installed on the second frame and connected to the axle of the second frame, and the hydraulic motor is used to drive the axle on the axle of the second frame to rotate.

[0013] A working machine provided according to the present invention further includes an electro-hydraulic steering system, the electro-hydraulic steering system is arranged on the second frame, and the electro-hydraulic steering system is connected to the axle of the second frame and is used to drive the axle of the second frame to steer.

[0014] The chassis provided by the present invention has a first frame and a second frame connected end to end and overlapping each other, and the first frame is detachably connected to the second frame through a connecting member. The first frame is used to install a first power unit, and the second frame is used to install a superstructure platform. During operation, the first frame can be connected to the second frame, and then the operation can be carried out through the superstructure platform on the second frame. In this way, the size of the chassis can be increased, thereby increasing the support area of the chassis, and further improving the load-bearing capacity and stability of the chassis. During the process of transfer transportation, the first frame and the second frame can be disassembled. The first frame can be driven by the first power unit to travel, and the second frame can be transported by other transportation vehicles during transfer. In this way, the size of the chassis can be reduced, thereby reducing the difficulty of road transportation.

[0015] With such a setting, when the chassis provided by the present invention is in road transportation, the first frame and the second frame can be disassembled to transport the first frame and the second frame separately, thereby reducing the size of the chassis and further reducing the difficulty of road transportation.

[0016] Furthermore, the construction machinery provided by the present invention includes all the above advantages of the chassis since it includes the chassis provided by the present invention. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural view of the chassis provided in some embodiments of the present invention;

[0019] Figure 2 is provided in some embodiments of the present invention Figure 1 top view of the chassis shown;

[0020] Figure 3 is provided in some embodiments of the present invention Figure 2 A-A sectional view of the view shown;

[0021] Figure 4 is provided in some embodiments of the present invention Figure 3 local enlarged view of part Ⅰ in the view shown;

[0022] Figure 5 is a top view of the first frame provided in some embodiments of the present invention;

[0023] Figure 6It is a bottom view of the second vehicle frame provided in some embodiments of the present invention.

[0024] Reference numerals:

[0025] 1. First vehicle frame; 2. Second vehicle frame; 3. Prism; 4. Threaded connector; 5. Lapping plate; 6. Through hole; 7. Threaded hole; 8. Polygonal hole. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the prior art, with the improvement of the lifting capacity of working machines such as cranes, it is necessary to increase the length dimension and width dimension of the chassis of the working machine to ensure the bearing capacity and stability of the chassis. With the increase of the chassis size, the difficulty of the working machine for transfer transportation on the road will also increase, resulting in an increase in the transportation cost of the working machine. To solve the problem in the prior art that with the increase of the chassis size, the difficulty of the working machine for transfer transportation on the road will also increase, resulting in an increase in the transportation cost of the working machine, and to achieve the effect of reducing the difficulty of the working machine for road transportation, the present invention provides a chassis and a working machine.

[0028] The following will be combined with Figures 1 to 6 Describe the chassis provided in the embodiments of the present invention.

[0029] Specifically, the chassis includes a first vehicle frame 1, a second vehicle frame 2, a positioning member and a connecting member.

[0030] Among them, the first vehicle frame 1 is used to install a first power unit capable of providing driving power. For example, the first power unit includes an engine. The engine can be connected to the axle on the first vehicle frame 1 through a gearbox, that is, the engine is connected to the gearbox, and the gearbox is connected to the axle on the first vehicle frame 1, so as to drive the axle on the first vehicle frame 1 to rotate, and further provide driving power for the first vehicle frame 1. Of course, the gearbox can also be connected to the axle through a transfer case, and other output shafts of the transfer case can be connected to a hydraulic pump, so that the first power unit can not only provide driving power, but also provide power for the hydraulic pump installed on the first vehicle frame 1.

[0031] The second vehicle frame 2 is used for mounting the upper mounting platform. For example, the upper mounting platform includes a slewing bearing and a boom. The slewing bearing is mounted on the second vehicle frame 2, and the boom is mounted on the slewing bearing. The slewing bearing is used to drive the boom to slewing, and the boom can lift heavy objects.

[0032] As Figures 1 - 3 shown, the first vehicle frame 1 and the second vehicle frame 2 are connected end to end. For example, in the direction from the front to the rear of the chassis, the first vehicle frame 1 and the second vehicle frame 2 are arranged in sequence. Among them, the front part of the chassis refers to Figure 1 the left side in Figure 1 , and the rear part of the chassis refers to Figure 3 the right side in Figure 4 . The first vehicle frame 1 and the second vehicle frame 2 overlap each other. For example, Figure 3 as Figure 4 shown, the second vehicle frame 2 is placed on the first vehicle frame 1. The first vehicle frame 1 and the second vehicle frame 2 are detachably connected by a connecting member, and the connecting member is used to bear the load perpendicular to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2. The load perpendicular to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2 is the normal load. As Figure 1 shown, the normal load extends along the Figure 1 vertical direction in Figure 1 , so that the connecting member can prevent the first vehicle frame 1 and the second vehicle frame 2 from separating from each other in the vertical direction. A positioning member is arranged between the first vehicle frame 1 and the second vehicle frame 2 and is used to bear the load parallel to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2, so as to limit the relative rotation or relative translation between the first vehicle frame 1 and the second vehicle frame 2. The load parallel to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2 is the tangential load. As Figure 1 shown, the tangential load extends along the Figure 1 horizontal direction in

[0033] , so that the positioning member can prevent the first vehicle frame 1 and the second vehicle frame 2 from generating relative movement along the horizontal plane and ensure that the first vehicle frame 1 and the second vehicle frame 2 have an accurate relative installation position. Through the connecting member and the positioning member, the connection strength and connection stiffness between the first vehicle frame 1 and the second vehicle frame 2 can be ensured, so as to ensure the support performance and structural strength of the chassis.

[0033] In the chassis provided in the embodiments of the present invention, the first frame 1 and the second frame 2 are connected end to end and overlap with each other, and the first frame 1 is detachably connected to the second frame 2 through a connecting member. The first frame 1 is used to install the first power unit, and the second frame 2 is used to install the upper mounting platform. During the operation process, the first frame 1 can be connected to the second frame 2, and then the operation can be carried out through the upper mounting platform on the second frame 2. In this way, the size of the chassis can be increased, thereby increasing the support area of the chassis, and further improving the load-bearing capacity and stability of the chassis. During the process of transfer transportation, the first frame 1 and the second frame 2 can be disassembled. The first frame 1 can travel under the drive of the first power unit, and the second frame 2 can be transported by other transport vehicles during the transfer. In this way, the size of the chassis can be reduced, thereby reducing the difficulty of road transportation.

[0034] With such a setting, when the chassis provided in the embodiments of the present invention is subjected to road transportation, the first frame 1 and the second frame 2 can be disassembled to transport the first frame 1 and the second frame 2 separately, thereby reducing the size of the chassis, and further reducing the difficulty of road transportation.

[0035] In some embodiments provided by the present invention, the positioning member includes a multi-prism 3. One of the first frame 1 and the second frame 2 is provided with the multi-prism 3, and the other is provided with a polygonal hole 8 for the multi-prism 3 to be inserted into. For example, the multi-prism 3 and the polygonal hole 8 can adopt a clearance fit or an interference fit. For example Figures 4 - 6 As shown, an example in which the positioning member is provided on the first frame 1 and the polygonal hole 8 is provided on the second frame 2, and the positioning member is set as a quadrangular prism. Of course, the setting position of the positioning member and the number of edges of the positioning member can be set according to actual needs. With such a setting, through the cooperation of the multi-prism 3 and the polygonal hole 8, the movement between the first frame 1 and the second frame 2 parallel to the overlapping surface of the first frame 1 and the second frame 2 can be restricted.

[0036] Optionally, the multi-prism 3 can be welded to the first frame 1 or the second frame 2, or mounting holes can be provided on the first frame 1 or the second frame 2, and the multi-prism 3 is detachably installed in the mounting holes.

[0037] Of course, the positioning member is not limited to being set as the multi-prism 3. For example, in other embodiments provided by the present invention, the positioning member includes a positioning pin, and the positioning pin includes a round pin or a diamond pin. One of the first frame 1 and the second frame 2 is provided with at least two positioning pins, and the other is provided with positioning holes corresponding to the positioning pins. By providing at least two positioning pins on the overlapping surface of the first frame 1 and the second frame 2, the movement between the first frame 1 and the second frame 2 parallel to the overlapping surface of the first frame 1 and the second frame 2 can also be restricted.

[0038] Optionally, the positioning pin can be welded to the first vehicle frame 1 or the second vehicle frame 2. Alternatively, mounting holes can be provided on the first vehicle frame 1 or the second vehicle frame 2, and the positioning pin can be detachably mounted in the mounting holes.

[0039] In some embodiments provided by the present invention, one end of the second vehicle frame 2 connected to the first vehicle frame 1 is provided with a lapping plate 5. The lapping plate 5 laps on the top of the first vehicle frame 1, that is, the lapping plate 5 laps on the top of one end of the first vehicle frame 1 where it is connected to the second vehicle frame 2. The positioning member is arranged between the first vehicle frame 1 and the lapping plate 5, that is, the positioning member is used to bear the load parallel to the lapping surface between the first vehicle frame 1 and the lapping plate 5. The connecting member connects the second vehicle frame 2 and the lapping plate 5, that is, the lapping plate 5 is detachably connected to the second vehicle frame 2 through the connecting member. By providing the lapping plate 5 for transition, it is convenient to connect the first vehicle frame 1 and the second vehicle frame 2.

[0040] In some embodiments provided by the present invention, the connecting member includes a threaded connecting member 4. One of the first vehicle frame 1 and the second vehicle frame 2 is provided with a through hole 6 for the threaded connecting member 4 to pass through, and the other is provided with a threaded hole 7 opposite to the through hole 6 and threadedly engaged with the threaded connecting member 4. Such a setting facilitates the connection and disassembly of the first vehicle frame 1 and the second vehicle frame 2. For example, the threaded connecting member 4 can be a screw. As Figure 3 、 Figure 4 shown is an example where the threaded hole 7 is provided on the first vehicle frame 1 and the through hole 6 is provided on the lapping plate 5 of the second vehicle frame 2.

[0041] In some embodiments provided by the present invention, the number of the threaded connecting members 4 is multiple, and the multiple threaded connecting members 4 are arranged in sequence to form an annular structure, that is, the number of the threaded holes 7 is set to be multiple, and the multiple threaded holes 7 are arranged in sequence to form an annular structure. Similarly, the number of the through holes 6 is also multiple, and the multiple through holes 6 are arranged in sequence to form an annular structure. The positioning member is arranged inside the annular structure, that is, the positioning member is arranged in the annular space of the annular structure. Such a setting makes the connection strength between the first vehicle frame 1 and the second vehicle frame 2 higher.

[0042] In some embodiments provided by the present invention, the upper mounting platform includes a slewing bearing, and the mounting position of the slewing bearing on the second vehicle frame 2 is set at one end of the second vehicle frame 2 close to the first vehicle frame 1. For example, referring to Figures 2 - 4 shown, the distance from the center of the positioning member to the end of the first vehicle frame 1 away from the second vehicle frame 2 accounts for 45% - 55% of the total length after the first vehicle frame 1 and the second vehicle frame 2 are connected, and the distance from the rotation center of the slewing bearing to the end of the first vehicle frame 1 away from the second vehicle frame 2 accounts for 55% - 75% of the total length after the first vehicle frame 1 and the second vehicle frame 2 are connected.

[0043] As Figure 1 、 Figure 2As shown, in some embodiments provided by the present invention, the first vehicle frame 1 includes longitudinal beams and a first box beam, and the first box beam is used to connect with the second vehicle frame 2. The longitudinal beams are arranged in a pair, and both longitudinal beams in the pair are connected to one end of the first box beam away from the second vehicle frame 2, and there is a spacing between the pair of longitudinal beams. For example, the pair of longitudinal beams can be connected by cross beams, so as to improve the structural strength of the first vehicle frame 1. Since the slewing bearing is arranged at the connection position between the first vehicle frame 1 and the second vehicle frame 2, the force at the connection between the first vehicle frame 1 and the second vehicle frame 2 is relatively large. Setting the end of the first vehicle frame 1 connected to the second vehicle frame 2 as the first box beam can improve the structural strength and load-bearing capacity of the first vehicle frame 1, thereby improving the structural strength and load-bearing capacity of the chassis.

[0044] As Figure 1 , Figure 2 shown, in some embodiments provided by the present invention, the second vehicle frame 2 is arranged as a second box beam. Since the upper mounting platform is arranged on the second vehicle frame 2, the load borne by the second vehicle frame 2 is relatively large. Setting the second vehicle frame 2 as the first box beam can improve the structural strength and load-bearing capacity of the second vehicle frame 2, thereby improving the structural strength and load-bearing capacity of the chassis.

[0045] Of course, the features in each of the above embodiments can also be combined. For example, the chassis provided in some embodiments of the present invention includes a first vehicle frame 1, a second vehicle frame 2, a positioning member, and a connecting member. The first vehicle frame 1 is used to mount a first power unit capable of providing driving power, and the second vehicle frame 2 is used to mount a superstructure platform. The first vehicle frame 1 and the second vehicle frame 2 are connected end to end, and the first vehicle frame 1 and the second vehicle frame 2 overlap each other. The first vehicle frame 1 and the second vehicle frame 2 are detachably connected by a connecting member, and the connecting member is used to bear the load perpendicular to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2. The positioning member is arranged between the first vehicle frame 1 and the second vehicle frame 2 and is used to bear the load parallel to the overlapping surface of the first vehicle frame 1 and the second vehicle frame 2. The positioning member includes a prism 3. One of the first vehicle frame 1 and the second vehicle frame 2 is provided with the prism 3, and the other is provided with a polygonal hole 8 for the prism 3 to be inserted into. Alternatively, the positioning member includes a positioning pin. One of the first vehicle frame 1 and the second vehicle frame 2 is provided with at least two positioning pins, and the other is provided with positioning holes corresponding to the positioning pins. One end of the second vehicle frame 2 connected to the first vehicle frame 1 is provided with a lap plate 5. The lap plate 5 is placed on the top of the first vehicle frame 1. The positioning member is arranged between the first vehicle frame 1 and the lap plate 5, and the connecting member connects the second vehicle frame 2 and the lap plate 5. The connecting member includes a threaded connecting member 4. One of the first vehicle frame 1 and the second vehicle frame 2 is provided with a through hole 6 for the threaded connecting member 4 to pass through, and the other is provided with a threaded hole 7 opposite to the through hole 6 and threadedly engaged with the threaded connecting member 4. The number of the threaded connecting members 4 is multiple, and the multiple threaded connecting members 4 are arranged in sequence to form an annular structure. The positioning member is arranged inside the annular structure. The superstructure platform includes a slewing bearing, and the installation position of the slewing bearing on the second vehicle frame 2 is arranged at one end of the second vehicle frame 2 close to the first vehicle frame 1.

[0046] An operating machine is also provided in an embodiment of the present invention.

[0047] Specifically, the operating machine includes a first power unit, a superstructure platform, and the chassis as described above.

[0048] Among them, the first power unit includes an engine. The engine can be connected to the axle on the first vehicle frame 1 through a gearbox, that is, the engine is connected to the gearbox, and the gearbox is connected to the axle on the first vehicle frame 1 of the axle, so as to drive the axle on the first vehicle frame 1 to rotate, and further provide driving power for the first vehicle frame 1. Of course, the gearbox can also be connected to the axle through a transfer case, and other output shafts of the transfer case can be connected to a hydraulic pump, so that the first power unit can not only provide driving power, but also provide power for the hydraulic pump on the first vehicle frame 1.

[0049] The superstructure platform includes a slewing bearing and a lifting arm. The slewing bearing is installed on the second vehicle frame 2, and the lifting arm is installed on the slewing bearing. The slewing bearing is used to drive the lifting arm to rotate, and the lifting arm can lift heavy objects.

[0050] It should be noted that the work machine includes the chassis and thus all the advantages of the chassis, which will not be elaborated here.

[0051] It should also be noted that the work machine described in the present invention includes but is not limited to cranes, such as all-terrain cranes.

[0052] In some embodiments provided by the present invention, the work machine further includes a second power unit and a hydraulic motor. The second power unit is arranged on the upper mounting platform. The second power unit is connected to the hydraulic motor and can drive the hydraulic motor to rotate. The hydraulic motor is installed on the second vehicle frame 2 and is connected to the axle of the second vehicle frame 2. Specifically, it means that the hydraulic motor is connected to the axle on the axle of the second vehicle frame 2 and is used to drive the axle on the axle of the second vehicle frame 2 to rotate. With such an arrangement, the second vehicle frame 2 equipped with the upper mounting platform can also move under the action of the second power unit after being disassembled from the first vehicle frame 1.

[0053] Optionally, the second power unit can be an engine or an electric motor. The second power unit can drive a hydraulic pump on the upper mounting platform to rotate. The hydraulic pump is connected to the hydraulic motor through a pipeline. On the one hand, the hydraulic pump can provide hydraulic power during the operation, such as driving the boom to extend and lift. On the other hand, the hydraulic pump can provide power for the hydraulic motor on the second vehicle frame 2 so that the hydraulic motor can drive the second vehicle frame 2 to move.

[0054] Certainly, the second power unit can also include an engine, an electric motor and a power battery. Among them, the engine is connected to the motor shaft of the electric motor through a first clutch. The motor shaft of the electric motor is connected to the hydraulic pump through a second clutch. At the same time, the electric motor is also connected to the power battery. When both the first clutch and the second clutch are in the engaged state, the engine and the electric motor can output power simultaneously, so as to provide sufficient power for the hydraulic pump, which is suitable for heavy-duty occasions. When the first clutch is engaged and the second clutch is disengaged, the engine drives the electric motor to rotate, and the electric motor charges the power battery. In this way, in the standby state, the engine can be used to drive the electric motor to generate electricity, which can avoid the engine idling and consuming energy, so as to improve the energy efficiency level of the work machine. When the first clutch is disengaged and the second clutch is engaged, the engine stops, and the electric motor can be powered by the power battery to make the electric motor rotate. By driving the electric motor with the power battery to provide power, the emissions of the work machine can be effectively reduced. Optionally, the electric motor can be connected to the hydraulic pump through a speed reducer.

[0055] In some embodiments provided by the present invention, the work machine further includes an electro-hydraulic steering system. The electro-hydraulic steering system is disposed on the second frame 2, and the electro-hydraulic steering system is connected to the axle of the second frame 2 for driving the axle of the second frame 2 to steer. With such an arrangement, after the second frame 2 is separated from the first frame 1, the electro-hydraulic steering system can be used to control the steering of the second frame 2, and in cooperation with the second power unit and the hydraulic motor, the second frame 2 can be made to travel and turn, thereby improving the flexibility of the second frame 2. It should be noted that the electro-hydraulic steering system is a product in the prior art, and the present application does not modify its structure and principle, so no further description will be given here.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chassis, characterized in that, It includes a first vehicle frame (1), a second vehicle frame (2), a positioning member and a connecting member. The first vehicle frame (1) is used to install a first power unit capable of providing driving power. The second vehicle frame (2) is used to install a superstructure platform. The first vehicle frame (1) and the second vehicle frame (2) are connected end to end and overlap with each other. The first vehicle frame (1) and the second vehicle frame (2) are detachably connected by the connecting member. The connecting member is used to bear the load perpendicular to the overlapping surface of the first vehicle frame (1) and the second vehicle frame (2). The positioning member is arranged between the first vehicle frame (1) and the second vehicle frame (2) and is used to bear the load parallel to the overlapping surface of the first vehicle frame (1) and the second vehicle frame (2). The positioning member includes a prism (3). One of the first vehicle frame (1) and the second vehicle frame (2) is provided with the prism (3), and the other is provided with a polygonal hole (8) for the prism (3) to be inserted into. One end of the second vehicle frame (2) connected to the first vehicle frame (1) is provided with a lap plate (5). The lap plate (5) is placed on the top of the first vehicle frame (1). The positioning member is arranged between the first vehicle frame (1) and the lap plate (5). The connecting member connects the second vehicle frame (2) and the lap plate (5). The connecting member includes a threaded connecting member (4). One of the first vehicle frame (1) and the second vehicle frame (2) is provided with a through hole (6) for the threaded connecting member (4) to pass through, and the other is provided with a threaded hole (7) opposite to the through hole (6) and threadedly matched with the threaded connecting member (4).

2. The chassis according to claim 1, characterized in that, The positioning member can be replaced by a positioning pin. At least two of the positioning pins are provided on one of the first vehicle frame (1) and the second vehicle frame (2), and the other is provided with positioning holes corresponding to the positioning pins.

3. The chassis according to any one of claims 1-2, characterized in that, The number of the threaded connecting members (4) is multiple. The multiple threaded connecting members (4) are arranged in sequence to form an annular structure, and the positioning member is arranged inside the annular structure.

4. The chassis according to any one of claims 1-2, characterized in that The superstructure platform includes a slewing bearing. The installation position of the slewing bearing on the second vehicle frame (2) is set at one end of the second vehicle frame (2) close to the first vehicle frame (1).

5. A work machine, characterized in that, It includes a first power unit, a superstructure platform and a chassis according to any one of claims 1-4.

6. The work machine according to claim 5, characterized in that, It further includes a second power unit and a hydraulic motor. The second power unit is arranged on the superstructure platform. The second power unit is connected to the hydraulic motor and can drive the hydraulic motor to rotate. The hydraulic motor is installed on the second vehicle frame (2) and is connected to the axle of the second vehicle frame (2). The hydraulic motor is used to drive the axle on the axle of the second vehicle frame (2) to rotate.

7. The work machine according to claim 5, characterized in that, It further includes an electro-hydraulic steering system. The electro-hydraulic steering system is arranged on the second vehicle frame (2), and the electro-hydraulic steering system is connected to the axle of the second vehicle frame (2) and is used to drive the axle of the second vehicle frame (2) to steer.

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