Mobile platform for wheeled-tracked construction machine, and wheeled-tracked construction machine

Abstract

Provided in the present invention are a mobile platform for a wheeled-tracked construction machine, and a wheeled-tracked construction machine. The mobile platform comprises: an upper vehicle frame assembly; a rear axle frame rotationally connected to the rear end of the upper vehicle frame assembly and rotatable between a first position and a third position; a lower vehicle frame assembly; and a front axle frame rotatable between a second position and a fourth position, wherein the upper vehicle frame assembly can rotate at least 180° in a horizontal plane relative to the lower vehicle frame assembly, such that the rear axle frame in the third position can be located on the same side as the front axle frame, the bottommost ends of rear wheels connected to the rear axle frame in the first position and the bottommost ends of front wheels connected to the front axle frame in the second position are both lower than the bottom edge of a track, and the bottommost ends of the rear wheels connected to the rear axle frame in the third position and the bottommost ends of the front wheels connected to the front axle frame in the fourth position are both higher than the bottom edge of the track. By means of the mobile platform provided in the present invention, the problem of a working device interfering with and colliding with the front axle frame and the front wheels during operation can be solved.

Description

A mobile platform for a wheel-track engineering machine and a wheel-track engineering machine TECHNICAL FIELD

[0001] The present application relates to the field of wheel-track engineering machines, and in particular to a mobile platform for a wheel-track engineering machine and a wheel-track engineering machine. BACKGROUND

[0002] Engineering machines are an important part of the equipment industry. In general, the mechanical equipment necessary for comprehensive mechanized construction engineering required by earthwork construction engineering, pavement construction and maintenance, mobile hoisting and unloading operations, and various building engineering is called engineering machine. It is mainly used in the fields of national defense construction engineering, transportation construction, energy industry construction and production, mineral material industry construction and production, agricultural and water conservancy construction, industrial and civil building, urban construction, environmental protection, etc.

[0003] Among them, some common machines in reality, such as excavators, shovel loaders, loaders and bulldozers. In order to meet the needs, the walking device of some engineering machines will be equipped with driving wheels and tracks at the same time. Taking excavator as an example, excavator is divided into wheel excavator and track excavator, track excavator has slow walking speed, and long-distance transfer needs trailer. The wheel excavator has poor passability and cannot work in bad conditions, so a wheel-track excavator appears on the market.

[0004] In the process of realizing the present application, the inventor found that at least the following problems exist in the prior art:

[0005] In order to facilitate the description, still taking the excavator as an example, as shown in FIG. 1, a wheel-track excavator. The excavator 10 is generally composed of a working device 11, an upper vehicle body 12 and a lower vehicle body 13. Still taking the excavator shown in FIG. 1 as an example, in this application, the end of the upper vehicle body close to the working device is defined as the front end, and the end of the upper vehicle body away from the working device is defined as the rear end.

[0006] The front axle 14 and the rear axle 15 of the excavator 10 capable of realizing wheel-track double walking can be fixed on the lower vehicle frame assembly. When working, the working device, the front axle and the front wheel 16 are simultaneously in front of the vehicle, and are relatively close, which may cause interference and mechanical collision, thereby reducing the working range and flexibility.

[0007] Therefore, a mobile platform for a wheel-track engineering machine and a wheel-track engineering machine are needed to at least partially solve the above technical problems.

[0008] SUMMARY

[0009] The embodiment of the present application provides a moving platform for a wheel-track engineering machine and the wheel-track engineering machine, and can solve the problem of interference and collision between a working device and a front axle frame and front wheels when the wheel-track engineering machine is working.

[0010] In a first aspect, the present application provides a moving platform for a wheel-track engineering machine, the moving platform comprising:

[0011] an upper vehicle body, wherein the upper vehicle body comprises an upper vehicle frame assembly, the upper vehicle frame assembly is located at the bottom of the upper vehicle body, and a front end of the upper vehicle frame assembly is configured to be connected to a working device;

[0012] a lower vehicle body, wherein the lower vehicle body comprises a lower vehicle frame assembly and tracks arranged on the left and right sides of the lower vehicle frame assembly, and a top of the lower vehicle frame assembly is rotationally connected to the upper vehicle frame assembly via a slewing bearing mechanism;

[0013] a rear axle frame connected to rear wheels, another end of the rear axle frame is rotationally connected to a rear end of the upper vehicle frame assembly, and the rear axle frame is rotatable relative to the upper vehicle body between a first position in a downward extending direction and a third position above the first position;

[0014] a front axle frame connected to front wheels, another end of the front axle frame is rotationally connected to a front end of the lower vehicle frame assembly, and the front axle frame is rotatable relative to the lower vehicle body between a second position in a downward extending direction and a fourth position above the second position;

[0015] wherein the upper vehicle frame assembly is configured to be rotatable by at least 180° in a horizontal plane relative to the lower vehicle frame assembly, so that the rear axle frame in the third position is located on the same side as the front axle frame;

[0016] wherein the lowest ends of the rear wheels connected to the rear axle frame in the first position and the front wheels connected to the front axle frame in the second position are both lower than the bottom edge of the tracks, so that the moving platform moves through the front wheels and the rear wheels; and the lowest ends of the rear wheels connected to the rear axle frame in the third position and the front wheels connected to the front axle frame in the fourth position are both higher than the bottom edge of the tracks, so that the moving platform moves through the tracks.

[0017] According to the mobile platform of the present application, when the rear bridge frame is in the first position and the front bridge frame is in the second position, at this time the front wheels and the rear wheels are respectively located on the two sides of the upper vehicle body or the lower vehicle body, the mobile platform can move through the front wheels and the rear wheels, before the wheel-track type engineering machinery works, first the rear bridge frame is turned upward to the third position, the front bridge frame is turned upward to the fourth position, then the upper frame assembly is rotated 180° relative to the lower frame assembly in the horizontal plane through the slewing support mechanism, so that the rear bridge frame and the front bridge frame are located on the same side, and relative to the working device, are respectively located on the two sides, so that when the wheel-track type engineering machinery works, the working device does not interfere with and collide with the front bridge frame and the front wheels, the working range is increased and the flexibility is improved.

[0018] Optionally, the mobile platform further comprises:

[0019] A first driving mechanism connected to the upper frame assembly, used to drive the rear bridge frame to rotate relative to the upper vehicle body between the first position and the third position;

[0020] A second driving mechanism connected to the lower frame assembly, used to drive the front bridge frame to rotate relative to the lower vehicle body between the second position and the fourth position.

[0021] Optionally, the first driving mechanism comprises:

[0022] A rear bridge lifting oil cylinder connected to the upper frame assembly, an output shaft of the rear bridge lifting oil cylinder is rotatably connected to a first rotating arm and a second rotating arm respectively, the other end of the first rotating arm and the second rotating arm is rotatably connected to the rear bridge frame respectively; wherein the connection position of the first rotating arm and the rear bridge frame is closer to the rotating connection between the rear bridge frame and the upper frame assembly than the connection position of the second rotating arm and the rear bridge frame.

[0023] The second driving mechanism comprises:

[0024] A front bridge lifting oil cylinder, one end of the front bridge lifting oil cylinder is rotatably connected to the lower frame assembly, the other end of the front bridge lifting oil cylinder is rotatably connected to the front bridge frame.

[0025] Optionally, the rear bridge frame comprises:

[0026] A driving motor used to be power connected with the main pump of the engineering machinery through a hydraulic hose, the driving motor is arranged on the box body of the gearbox;

[0027] A gearbox power connected with the driving motor, the gearbox is arranged on the half shaft connected with the rear wheels and is power connected to the half shaft.

[0028] According to this solution, compared to the existing rear axle frame of tracked engineering machinery, which uses a drive motor and gearbox installed together and a mechanical hard connection between the gearbox and the rear axle to transmit power, resulting in a small lifting range and affecting the performance, the rear axle frame of this invention integrates the gearbox, drive motor, and half-shaft together, allowing power transmission between them and the engine via hydraulic hoses. Speed ​​control can be achieved through hydraulic hoses, avoiding the mechanical hard connection method, greatly increasing the movement range of the rear axle frame, reducing complex mechanical structures, and making it compact and small in size.

[0029] Optionally, the rear axle in the third position is positioned above the front axle in the fourth position.

[0030] Optionally, the upper frame assembly is rotatable 360° in the horizontal plane relative to the lower frame assembly.

[0031] Optionally, the construction machinery may be an excavator, a scraper, a loader, or a bulldozer.

[0032] Optionally, when the construction machinery is an excavator, the working attachments of the working device are buckets, grab buckets, leveling buckets, rake teeth, breaker cones, twist drills, electromagnetic chucks, vibrators, bulldozer blades, impact shovels, container forks, winches, or draglines, to meet the needs of various construction projects.

[0033] Secondly, the present invention also provides a wheeled tracked engineering machine, including the mobile platform of the above-mentioned technical solution.

[0034] According to the present invention, the wheeled and tracked engineering machinery adopts the mobile platform of the present invention, which prevents interference and collision between the working device and the front axle and front wheels during operation, thereby increasing the working range and improving flexibility.

[0035] The beneficial effects that can be obtained by utilizing the technical solution according to the embodiments of the present invention are at least as follows:

[0036] 1. In the mobile platform of the present invention, when the rear axle is in the first position and the front axle is in the second position, the mobile platform can move by the front and rear wheels. Before the wheel-tracked engineering machinery operates, the rear axle rotates upward to the third position and the front axle rotates upward to the fourth position. The upper frame assembly and the lower frame assembly rotate 180° relative to each other in the horizontal plane through the slewing bearing mechanism, so that the rear axle and the front axle are located on the same side of the upper or lower body. In this way, the working device will not interfere with or collide with the front axle and the front wheels during operation, thereby increasing the working range and improving flexibility.

[0037] 2. The mobile platform of the present invention is specially designed with a rear axle that integrates the gearbox, drive motor and half shaft together and transmits power to the engine through hydraulic hoses, which greatly increases the range of movement of the rear axle, simplifies the complex mechanical structure and makes it compact and small in size.

[0038] 3. Since the rear axle and front axle are located on the same side during operation, and are located on the sides of the upper or lower body respectively relative to the working device, the rear axle and front axle, as well as the rear wheel and front axle wheel, can replace the counterweight, reducing manufacturing costs.

[0039] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and will also become apparent in part to those skilled in the art upon studying the description, or may be learned by practice of the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0040] Those skilled in the art will understand that the objectives and advantages achievable with this invention are not limited to those specifically described above, and that the above and other objectives achievable with this invention will become clearer from the following detailed description. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. The components in the drawings are not drawn to scale but are merely illustrative of the principles of the invention. For ease of illustration and description of certain parts of the invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the invention. In the drawings:

[0042] Figure 1 is a schematic diagram of an existing wheeled excavator;

[0043] Figure 2 is a schematic diagram of the connection between the rear axle frame and the engine and main pump in an existing excavator;

[0044] Figure 3 is a schematic diagram of a mobile platform according to an embodiment of the present invention. The schematic diagram also shows the related working device and the cab in the upper body. At this time, the mobile platform is in the state of front and rear wheel travel.

[0045] Figure 4 is another schematic diagram of a mobile platform according to an embodiment of the present invention. This diagram also shows the associated working device and the driver's cab in the upper body. In this case, the mobile platform is in tracked travel mode, and the working device and the front and rear wheels are respectively located on both sides of the upper body; and

[0046] Figure 5 is a schematic diagram of the connection between the rear axle and the engine, main pump and rear wheels in a mobile platform according to an embodiment of the present invention.

[0047] Explanation of Reference Numerals: 10: excavator; 11: working device; 12: upper vehicle body; 13: lower vehicle body; 14: front axle; 15: rear axle; 16: front wheel; 100: moving platform; 110: upper vehicle frame assembly; 120: rear axle frame; 121: rear wheel; 130: lower vehicle frame assembly; 131: track; 140: slewing bearing mechanism; 150: front axle frame; 151: front wheel; 160: rear axle lifting cylinder; 161: first turning arm; 162: second turning arm; 163: front axle lifting cylinder; 171: hydraulic hose; 172: drive motor; 173: transmission; MA: upper vehicle body; MB: lower vehicle body; MC: working device; MD: work implement; ME: engine; MF: main pump; MG: half shaft; W1: first position; W2: second position; W3: third position; W4: fourth position; 200: excavator. DETAILED DESCRIPTION

[0048] The objects and advantages of the present application, as well as methods of accomplishing the same, will be apparent from the exemplary embodiments described hereinafter. It is also to be understood that the following description is only illustrative of the present application and is not in any sense limiting. Various modifications of the application will occur to the skilled person upon reading the description.

[0049] It is to be noted that the terms used herein are merely for describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has," when used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0050] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" itself does not imply the existence of a "second component," and the term "second component" itself does not imply the existence of a "first component."

[0051] It is to be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar terms used herein are for illustrative purposes only and are not limiting.

[0052] The application provides a mobile platform 100 for a wheel-track engineering machine. The mobile platform 100 can be applied in the field of engineering machines, in particular wheel-track engineering machines, to solve the problem of interference and collision between the working device and the front axle frame and front wheels during operation of the existing wheel-track engineering machine.

[0053] For the convenience of description, the wheel-track engineering machine will be described by taking an excavator as an example in the following embodiments, but this does not mean limitation, and the wheel-track engineering machine can also be a scraper, a loader or a bulldozer or other engineering machines that can adopt wheel-track dual movement.

[0054] A common excavator generally consists of a working device, an upper vehicle body and a lower vehicle body, and the specific structure includes a power device, a working device, a rotary support mechanism, a control mechanism, a transmission mechanism, a walking device and auxiliary facilities. According to its structure and purpose, it can be divided into many types such as track type, tire type, step and track type, full hydraulic type, half hydraulic type, full rotation type, non-full rotation type, general type, special type, articulated type and telescopic arm type.

[0055] The walking device, i.e. the chassis, includes a track frame and a walking system, and is mainly composed of a track frame, a walking motor plus a speed reducer and its pipeline, a driving wheel, a guide wheel, a chain wheel, a supporting wheel, a track, a tensioning and buffering device and the like. Its function is to support the weight of the excavator and convert the power transmitted by the driving wheel into traction force to realize the walking of the whole machine. The frame assembly (i.e. the track frame assembly) is generally a whole welded piece, which can adopt an X-shaped structure. The main advantage of the X-shaped structure is high load capacity. The frame assembly is welded from a left longitudinal beam (i.e. a left track frame), a main frame (i.e. a middle frame) and a right longitudinal beam (i.e. a right track frame).

[0056] In the preferred embodiment, as shown in FIG. 3 and FIG. 4, FIG. 3 is a schematic diagram of the mobile platform 100 according to an embodiment of the application, which also shows the relevant working device MC and the cab in the upper vehicle body MA, and at this time the mobile platform 100 is in the front and rear wheel 121 walking state; FIG. 4 is another schematic diagram of the mobile platform 100 according to an embodiment of the application, which also shows the relevant working device MC and the cab in the upper vehicle body MA, and at this time the mobile platform 100 is in the track 131 walking state and the working device MC is respectively on the two sides of the upper vehicle body MA. The mobile platform 100 includes an upper frame assembly 110, a rear axle frame 120, a lower frame assembly 130 and a front axle frame 150.

[0057] The upper frame assembly 110 is an important prior art structure in the upper body MA of the excavator, and is used to rotatably mount the rear axle frame 120. The rear axle frame 120 is used to rotatably connect the rear wheels 121. The lower frame assembly 130 is also an important prior art structure in the lower body MB of the excavator, and is used to mount the tracks 131 and the front axle frame 150. The front axle frame 150 is used to rotatably connect the front wheels 151.

[0058] In particular, the upper frame assembly 110 is an important component structure in the bottom of the upper body MA of the excavator, and the cab and the engine compartment are generally arranged on the upper frame assembly 110, which are prior art devices in the excavator and will not be described in detail here. The front end of the upper frame assembly 110 is rotatably connected to the working device MC. Generally, the working device MC of the excavator includes a boom, a stick, and a work implement MD. Among them, the work implement MD commonly has a bucket, a grab, a slope flattening bucket, a rake tooth, a crushing cone, a auger, an electromagnetic suction disc, a vibrator, a bulldozer plate, an impact shovel, a container fork, a hinge disc, or a dragline, which are not limited here to meet the needs of various construction.

[0059] The rear axle frame 120 connected to the rear wheels 121 is also an important component structure in the excavator, which can adopt prior art devices. The other end of the rear axle frame 120 is rotatably connected to the rear end of the upper frame assembly 110. The rear axle frame 120 is rotatable relative to the upper body MA between a first position W1 in the downward extension direction and a third position W3 above the first position W1.

[0060] The lower body MB includes the lower frame assembly 130 and the tracks 131 arranged on the left and right sides of the lower frame assembly 130. The tracks 131 are generally bidirectional tracks 131. The top of the lower frame assembly 130 is rotatably connected to the upper frame assembly 110 via the swing bearing mechanism 140. Among them, the swing bearing mechanism 140 is also an important component structure in the excavator, which can adopt prior art devices.

[0061] The upper frame assembly 110 is rotatable relative to the lower frame assembly 130 by at least 180° in the horizontal plane via the rotary bearing mechanism 140, so that the rear axle assembly 120 and the front axle assembly 150 (to be described below) can be simultaneously on the same side of the upper body MA or the lower body MB. Preferably, the upper frame assembly 110 and the lower frame assembly 130 are rotatable relative to each other by 360° in the horizontal plane. There are various ways to achieve the relative rotation between the upper frame assembly 110 and the lower frame assembly 130 by at least 180° in the horizontal plane. Generally, the common design is that the lower frame assembly 130 does not rotate, and the upper frame assembly 110 is rotatable relative to the lower frame assembly 130 by at least 180°. Logically, the upper frame assembly 110 does not rotate, and the lower frame assembly 130 is rotatable relative to the upper frame assembly 110 by at least 180°. Alternatively, both the upper frame assembly 110 and the lower frame assembly 130 are rotatable, and are rotatable relative to each other by at least 180°, which can reduce the time spent on rotation.

[0062] The front axle assembly 150 connected to the front wheels 151 is also an important component structure in the excavator, which can adopt a prior art device to drive the front wheels 151 to rotate by transmitting power from the power transmission device. The other end of the front axle assembly 150 is rotatably connected to the front end of the lower frame assembly 130. The front axle assembly 150 is rotatable relative to the lower body MB between a second position W2 extending downward and a fourth position W4 above the second position W2.

[0063] Among them, the lowest end of the rear wheels 121 connected to the rear axle assembly 120 in the first position W1 and the front wheels 151 connected to the front axle assembly 150 in the second position W2 are lower than the bottom edge of the track 131, so that the mobile platform 100 moves by the front wheels 151 and the rear wheels 121. The lowest end of the rear wheels 121 connected to the rear axle assembly 120 in the third position W3 and the front wheels 151 connected to the front axle assembly 150 in the fourth position W4 are higher than the bottom edge of the track 131, so that the mobile platform 100 moves by the track 131.

[0064] When the rear axle bracket 120 is at the first position W1 and the front axle bracket 150 is at the second position W2, the mobile platform 100 can move through the front wheels 151 and the rear wheels 121, and the wheels-tracked engineering machinery works first, the rear axle bracket 120 is rotated upward to the third position W3, the front axle bracket 150 is rotated upward to the fourth position W4, and then the upper frame assembly 110 and the lower frame assembly 130 are relatively rotated 180° in the horizontal plane through the slewing bearing mechanism 140, so that the rear axle bracket 120 and the front axle bracket 150 are located on the same side of the upper vehicle body MA or the lower vehicle body MB, and the working device MC is located on the two sides of the upper vehicle body MA or the lower vehicle body MB, respectively, so that the working device MC does not interfere with and collide with the front axle bracket 150 and the front wheels 151 when the wheels-tracked engineering machinery works, the working range is increased and the flexibility is improved.

[0065] It should be noted that the embodiments of the present application do not limit the specific types of the rear axle bracket 120 and the front axle bracket 150, for example, the rear axle bracket 120 and the front axle bracket 150 can both not be drive axles, can both be drive axles, or one of them can be a drive axle. For example, when the rear axle bracket 120 is a drive axle and the front axle bracket 150 is not a drive axle, the rear wheels 121 are drive wheels and the front wheels 151 are passive wheels.

[0066] In order to realize the rotation of the rear axle bracket 120 and the front axle bracket 150, the mobile platform 100 can further include a first driving mechanism and a second driving mechanism.

[0067] The first driving mechanism is connected to the upper frame assembly 110 and is used to drive the rear axle bracket 120 to rotate relative to the upper vehicle body MA between the first position W1 and the third position W3. The second driving mechanism is connected to the lower frame assembly 130 and is used to drive the front axle bracket 150 to rotate relative to the lower vehicle body MB between the second position W2 and the fourth position W4. The specific type of the first driving mechanism and the second driving mechanism can not be limited.

[0068] In order to provide a simple and practical first driving mechanism and second driving mechanism, the first driving mechanism can include a rear axle lifting cylinder 160. The second driving mechanism can include a front axle lifting cylinder 163.

[0069] Referring to Fig. 3, the rear axle lifting cylinder 160 is connected to the upper frame assembly 110. The output shaft of the rear axle lifting cylinder 160 is rotatably connected to the first rotating arm 161 and the second rotating arm 162, respectively. The other end of the first rotating arm 161 and the second rotating arm 162 is rotatably connected to the rear axle frame 120, respectively. The connection position of the first rotating arm 161 to the rear axle frame 120 is closer to the rotating connection between the rear axle frame 120 and the upper frame assembly 110 than the connection position of the second rotating arm 162 to the rear axle frame 120. Generally, the length of the first rotating arm 161 is shorter than the length of the second rotating arm 162.

[0070] Referring to Fig. 4, one end of the front axle lifting cylinder 163 is rotatably connected to the lower frame assembly 130. The other end of the front axle lifting cylinder 163 is rotatably connected to the front axle frame 150.

[0071] With continued reference to Fig. 3, the front axle lifting cylinder 163 is in the extended state, so that the front axle frame 150 extends in the downward direction and is in the second position W2. The rear axle lifting cylinder 160 is in the extended state, so that the rear axle frame 120 also extends in the downward direction and is in the first position W1. At this time, the lowest end of the front wheel 151 and the rear wheel 121 are both lower than the bottom edge of the track 131, and the front wheel 151 and the rear wheel 121 are located on the two sides of the upper vehicle body MA or the lower vehicle body MB, respectively, and the mobile platform 100 can move through the front wheel 151 and the rear wheel 121.

[0072] Then, with continued reference to Fig. 4, the rear axle frame 120 is rotated upward and away from the ground and rotated to the third position W3 by retracting the rear axle lifting cylinder 160, and the front axle frame 150 is also rotated upward and away from the ground and rotated to the fourth position W4 by retracting the front axle lifting cylinder 163, and then the upper frame assembly 110 is relatively rotated 180° with respect to the lower frame assembly 130 through the swing bearing mechanism 140 of the excavator itself, so that the rear axle frame 120 and the front axle frame 150 are on the same side of the upper vehicle body MA or the lower vehicle body MB, and the rear wheel 121 and the front wheel 151 are also on the same side of the upper vehicle body MA or the lower vehicle body MB. At this time, the working device MC and the front axle frame 150, the front wheel 151 are on the opposite sides, and the working device MC will not interfere with the front axle frame 150 and the front wheel 151 during work, increasing the working range and improving the flexibility.

[0073] When the rear axle frame 120 adopts a drive axle capable of driving the rear wheel to rotate, referring to Fig. 2, which is a schematic diagram of the connection between the rear axle frame and the engine and the main pump in the existing excavator. The rear axle frame of the existing excavator generally adopts a transmission power mode in which the drive motor and the gearbox are installed together, and the gearbox and the rear axle are mechanically hard connected through a transmission shaft. Due to the mechanical hard connection mode, the lifting range of the rear axle frame is small, which affects the use effect.

[0074] In order to solve the above problems, with reference to FIG. 5, the rear axle frame 120 of the embodiment of the present application can be configured as follows: the driving motor 172 is power connected to the main pump MF of the excavator through the hydraulic hose 171. The main pump MF is power connected to the engine ME of the excavator. The driving motor 172 is arranged on the case of the gearbox 173. The gearbox 173 is power connected to the driving motor 172. The gearbox 173 is arranged on and power connected to the half shaft MG connected to the rear wheel 121. The half shaft MG is a prior art device. The gearbox 173 transmits the power from the driving motor 172 to the half shaft MG after torque and speed conversion, and drives the rear wheel 121 to rotate through the half shaft MG.

[0075] Since the rear axle frame 120 of the embodiment of the present application integrates the gearbox 173, the driving motor 172 and the half shaft MG, and transmits power between the engine ME and the rear axle frame 120 through the hydraulic hose 171, the speed control can be achieved through the hydraulic hose 171, avoiding the mechanical hard connection mode, greatly increasing the moving range of the rear axle frame 120, reducing the complex mechanical structure, and making the volume compact and small.

[0076] When the rear axle frame 120 is rotated upward to the third position W3 and the front axle frame 150 is rotated upward to the fourth position W4, preferentially, the rear axle frame 120 in the third position W3 is above the front axle frame 150 in the fourth position W4. Further, the rear axle frame 120 in the third position W3 is at least partially movable above the upper carriage assembly 110.

[0077] In summary, according to the mobile platform 100 of the present application, when the rear axle frame 120 and the front axle frame 150 are in the first position W1 and the second position W2 respectively, the mobile platform 100 can move through the front wheel 151 and the rear wheel 121. During operation, the rear axle frame 120 and the front axle frame 150 have been rotated upward to the third position W3 and the fourth position W4 respectively, and the rear axle frame 120 and the front axle frame 150 are located on the same side of the upper carriage MA or the lower carriage MB through the slewing bearing mechanism 140. In this way, during operation, the working device MC does not interfere with or collide with the front axle frame 150 and the front wheel 151, increasing the operation range and improving the flexibility. At the same time, since the rear axle frame 120 and the front axle frame 150 are located on the same side during operation, and are located on the two sides of the upper carriage MA or the lower carriage MB with respect to the working device MC, the rear axle frame 120 and the front axle frame 150, and the rear wheel 121 and the front wheel 151 can also act as counterweights, reducing the manufacturing cost. In addition, the mobile platform 100 of the present application is particularly designed to integrate the gearbox 173, the driving motor 172 and the half shaft MG, and transmit power between the engine ME and the rear axle frame 120 through the hydraulic hose 171, greatly increasing the moving range of the rear axle frame 120, simplifying the complex mechanical structure, and making the volume compact and small.

[0078] With reference to Fig. 4, in a second aspect, the present application also provides a wheel-track excavator 200 comprising the mobile platform 100 of the above-mentioned embodiment.

[0079] Since the excavator according to the embodiment of the present application comprises the mobile platform 100 of the above-mentioned embodiment, it comprises all the features and effects of the mobile platform 100, which will not be repeated here.

[0080] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

Claims

1. A mobile platform for a track loader, comprising: The mobile platform comprises: an upper vehicle body, wherein the upper vehicle body comprises an upper vehicle frame assembly, the upper vehicle frame assembly is located at the bottom of the upper vehicle body, and the front end of the upper vehicle frame assembly is used for being connected to a working device; a lower vehicle body, the lower vehicle body comprises a lower vehicle frame assembly and tracks arranged on the left and right sides of the lower vehicle frame assembly, and the top of the lower vehicle frame assembly is rotationally connected to the upper vehicle frame assembly through a rotary support mechanism; a rear axle frame connected to rear wheels, the other end of the rear axle frame is rotationally connected to the rear end of the upper vehicle frame assembly, and the rear axle frame is rotatable relative to the upper vehicle body between a first position in a downward extending direction and a third position above the first position; a front axle frame connected to front wheels, the other end of the front axle frame is rotationally connected to the front end of the lower vehicle frame assembly, and the front axle frame is rotatable relative to the lower vehicle body between a second position in a downward extending direction and a fourth position above the second position; wherein the upper vehicle frame assembly is configured to be rotatable at least 180° in a horizontal plane relative to the lower vehicle frame assembly, so that the rear axle frame in the third position can be located on the same side as the front axle frame. wherein the lowest end of the rear wheels connected to the rear axle frame in the first position and the front wheels connected to the front axle frame in the second position are both lower than the bottom edge of the tracks, so that the mobile platform moves through the front wheels and the rear wheels; and the lowest end of the rear wheels connected to the rear axle frame in the third position and the front wheels connected to the front axle frame in the fourth position are both higher than the bottom edge of the tracks, so that the mobile platform moves through the tracks.

2. The mobile platform of claim 1, wherein, Further comprising: a first driving mechanism connected to the upper vehicle frame assembly, used for driving the rear axle frame to rotate relative to the upper vehicle body between the first position and the third position; a second driving mechanism connected to the lower vehicle frame assembly, used for driving the front axle frame to rotate relative to the lower vehicle body between the second position and the fourth position.

3. The mobile platform of claim 2, wherein, The first driving mechanism comprises: a rear axle lifting oil cylinder connected to the upper vehicle frame assembly, the output shaft of the rear axle lifting oil cylinder is rotationally connected to a first rotary arm and a second rotary arm respectively, the other end of the first rotary arm and the second rotary arm is rotationally connected to the rear axle frame respectively; wherein the connection position of the first rotary arm and the rear axle frame is closer to the rotary connection between the rear axle frame and the upper vehicle frame assembly than the connection position of the second rotary arm and the rear axle frame. The second driving mechanism comprises: a front axle lifting oil cylinder, one end of the front axle lifting oil cylinder is rotationally connected to the lower vehicle frame assembly, and the other end of the front axle lifting oil cylinder is rotationally connected to the front axle frame.

4. The mobile platform of claim 1, wherein, The rear axle frame comprises: a driving motor used for being power connected to a main pump of the engineering machinery through a hydraulic hose, the driving motor is arranged on the box body of a gearbox; a gearbox power connected to the driving motor, the gearbox is arranged on a half shaft connected to the rear wheels and is power connected to the half shaft.

5. The mobile platform of claim 1, wherein, The rear axle frame in the third position is located above the front axle frame in the fourth position.

6. The mobile platform of claim 1, wherein, The upper vehicle frame assembly is rotatable 360° in a horizontal plane relative to the lower vehicle frame assembly.

7. The mobile platform of claim 1, wherein, The engineering machine is an excavator, a shovel, a loader or a bulldozer.

8. The mobile platform of claim 1, wherein, When the engineering machine is an excavator, the working device's working implement is a bucket, a grab, a leveler, a rake, a breaking cone, a twist drill, an electromagnetic chuck, a vibrator, a bulldozer plate, a percussion shovel, a container fork, a hinge plate or a dragline, to meet the needs of various constructions.

9. A track and wheel construction machine characterized by comprising: A mobile platform as claimed in one of claims 1 to 8.

10. A working machine according to claim 9, characterized by The front end of the upper frame assembly is rotatably connected to the working device's working implement through the large arm and the small arm which are hingedly connected to each other.

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