Moving platform for wheel-tracked engineering machinery and wheel-tracked engineering machinery

Abstract

The invention provides a mobile platform for a wheel-tracked engineering machine and the wheel-tracked engineering machine. The mobile platform comprises an upper frame assembly, a lower frame assembly and an upper frame assembly, the rear axle frame is rotationally connected to the rear end of the upper frame assembly and can rotate between a first position and a third position; an upper frame assembly; the front axle frame can rotate between a second position and a fourth position; the upper frame assembly can rotate by at least 180 degrees in the horizontal plane relative to the lower frame assembly, so that the rear axle frame and the front axle frame can be located on the same side at the third position. The bottommost ends of the rear wheels connected with the rear axle frame at the first position and the front wheels connected with the front axle frame at the second position are lower than the bottom edge of the crawler belt; and the bottommost ends of the rear wheels connected with the rear axle frame at the third position and the front wheels connected with the front axle frame at the fourth position are higher than the bottom edge of the crawler belt. According to the mobile platform provided by the invention, the problem that the working device interferes with and collides with the front axle frame and the front wheels during operation can be solved.

Description

Technical Field

[0001] The present invention relates to the field of wheel-crawler engineering machinery, and in particular to a mobile platform for wheel-crawler engineering machinery and the wheel-crawler engineering machinery. Background Art

[0002] Engineering machinery is an important part of the equipment industry. Generally speaking, all mechanical equipment required for earthwork construction, road construction and maintenance, mobile lifting and loading and unloading operations, and comprehensive mechanized construction required for various construction projects are called engineering machinery. It is mainly used in national defense construction projects, transportation construction, energy industry construction and production, mining and other raw material industry construction and production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, environmental protection and other fields.

[0003] Among them, there are some common machines in reality, such as excavators, scrapers, loaders and bulldozers. In order to meet the needs, the walking devices of some construction machinery will be equipped with both drive wheels and crawler tracks. Taking excavators as an example, excavators are divided into wheeled excavators and crawler excavators. Crawler excavators have slow walking speeds and require trailers for long-distance transfers. Wheeled excavators have poor passability and cannot work in harsh sites, so a wheeled crawler excavator has appeared on the market.

[0004] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0005] For the sake of convenience, we still take the excavator as an example. Figure 1 The figure shows a wheel-crawler excavator. The excavator 10 generally consists of three parts: a working device 11, an upper vehicle body 12 and a lower vehicle body 13. Figure 1 Taking the position shown in the middle excavator as an example, in the present 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 existing wheeled crawler double-travel excavator 10 are fixed to the lower frame assembly. During operation, the working device, the front axle and the front wheels 16 are all in front of the vehicle at the same time and are relatively close to each other, which may cause interference and the risk of mechanical collision, reducing the operating range and flexibility.

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

[0008] The embodiments of the present invention provide a mobile platform for a wheel-crawler engineering machinery and a wheel-crawler engineering machinery, which can solve the problem of interference and collision between a working device and a front axle frame and a front wheel of the wheel-crawler engineering machinery during operation.

[0009] In a first aspect, the present invention provides a mobile platform for a wheel-type engineering machinery, the mobile platform comprising:

[0010] An upper vehicle body, wherein the upper vehicle body comprises an upper frame assembly, the upper frame assembly is located at the bottom of the upper vehicle body, and the front end of the upper frame assembly is used to connect to the working device;

[0011] A lower vehicle body, the lower vehicle body comprising a lower frame assembly and crawlers arranged on the left and right sides of the lower frame assembly, the top of the lower frame assembly being rotatably connected to the upper frame assembly via a slewing bearing mechanism;

[0012] A rear axle frame connected to the rear wheel, the other end of the rear axle frame being rotatably connected to the rear end of the upper frame assembly, the rear axle frame being rotatable relative to the upper body between a first position in a downward extending direction and a third position located above the first position;

[0013] A front axle frame connected to the front wheel, the other end of the front axle frame being rotatably connected to the front end of the lower frame assembly, the front axle frame being rotatable relative to the lower body between a second position in a downward extending direction and a fourth position located above the second position;

[0014] The upper frame assembly is configured to be rotatable at least 180° in a horizontal plane relative to the lower frame assembly, so that the rear axle frame can be located on the same side as the front axle frame when in the third position;

[0015] Among them, the bottom ends of the rear wheels connected to the rear axle frame when in the first position and the front wheels connected to the front axle frame when in the second position are both lower than the bottom edge of the track, so that the mobile platform moves through the front wheels and the rear wheels; the bottom ends of the rear wheels connected to the rear axle frame when in the third position and the front wheels connected to the front axle frame when in the fourth position are both higher than the bottom edge of the track, so that the mobile platform moves through the track.

[0016] According to the mobile platform of the present invention, when the rear axle frame is in the first position and the front axle frame is in the second position, the front wheels and the rear wheels are respectively located on both sides of the upper vehicle body or the lower vehicle body, and the mobile platform can be moved by the front wheels and the rear wheels. Before the wheel-crawler engineering machinery operates, the rear axle frame is first rotated upward to the third position, and the front axle frame is rotated upward to the fourth position, and 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 axle frame and the front axle frame are located on the same side and are respectively located on both sides relative to the working device. In this way, when the wheel-crawler engineering machinery is operating, there will be no interference or collision between the working device and the front axle frame and the front wheel, thereby increasing the operating range and improving flexibility.

[0017] Optionally, the mobile platform further includes:

[0018] a first drive mechanism connected to the upper frame assembly, for driving the rear axle frame to rotate relative to the upper body between a first position and a third position;

[0019] A second drive mechanism connected to the lower frame assembly is used to drive the front axle frame to rotate relative to the lower body between the second position and the fourth position.

[0020] Optionally, the first driving mechanism includes:

[0021] A rear axle lifting cylinder connected to the upper frame assembly, wherein the output shaft of the rear axle lifting cylinder is rotatably connected to a first rotating arm and a second rotating arm respectively, and the other ends of the first rotating arm and the second rotating arm are rotatably connected to the rear axle frame respectively; wherein the connection position of the first rotating arm and the rear axle frame is closer to the rotation connection between the rear axle frame and the upper frame assembly than the connection position of the second rotating arm and the rear axle frame;

[0022] The second driving mechanism shown comprises:

[0023] A front axle lifting cylinder, one end of which is rotatably connected to the lower frame assembly, and the other end of which is rotatably connected to the front axle frame.

[0024] Optionally, the rear axle frame comprises:

[0025] A drive motor used for being connected to the main pump of the engineering machinery through a hydraulic hose, wherein the drive motor is arranged on a housing of the gearbox;

[0026] A gearbox is connected to the driving motor power, and the gearbox is arranged on a half shaft connected to the rear wheel and is power connected to the half shaft.

[0027] According to this solution, compared with the existing rear axle frame of wheel-crawler engineering machinery in which the drive motor and gearbox are installed together, and the power is transmitted between the gearbox and the rear axle through a mechanical hard connection of the drive shaft, the lifting range of the rear axle frame in the mechanical hard connection method is small, which affects the use effect. The rear axle frame of the present invention integrates the gearbox, drive motor and half-axle together, so that power is transmitted between it and the engine through a hydraulic hose, and speed control can be achieved through the hydraulic hose, avoiding the mechanical hard connection method, greatly increasing the moving range of the rear axle frame, reducing the complex mechanical structure, and making the size compact and small.

[0028] Optionally, the rear axle frame when in the third position is located above the front axle frame when in the fourth position.

[0029] Optionally, the upper frame assembly can rotate 360° in a horizontal plane relative to the lower frame assembly.

[0030] Optionally, the engineering machinery is an excavator, a scraper, a loader or a bulldozer.

[0031] Optionally, when the construction machinery is an excavator, the working accessories of the working device are a bucket, a grab, a leveling bucket, rake teeth, a crushing cone, a twist drill, an electromagnetic suction cup, a vibrator, a bulldozer, an impact shovel, a container fork, a capstan or a dragline to meet various construction needs.

[0032] In a second aspect, the present invention further provides a wheel-crawler engineering machinery, comprising a mobile platform of the above technical solution.

[0033] According to the wheel-crawler engineering machinery of the present invention, since it adopts the mobile platform of the present invention, there will be no interference or collision between the working device and the front axle frame and the front wheel during operation, thereby increasing the operating range and improving flexibility.

[0034] By utilizing the technical solution according to the embodiment of the present invention, the beneficial effects that can be obtained are at least:

[0035] 1. The mobile platform of the present invention, when the rear axle frame is in the first position and the front axle frame is in the second position, the mobile platform can be moved by the front wheels and the rear wheels. Before the wheel-crawler engineering machinery operates, the rear axle frame rotates upward to the third position, and the front axle frame rotates upward to the fourth position. The upper frame assembly and the lower frame assembly are relatively rotated 180 degrees in the horizontal plane through the slewing support mechanism, so that the rear axle frame and the front axle frame are located on the same side of the upper vehicle body or the lower vehicle body. In this way, the working device will not interfere with or collide with the front axle frame and the front wheel during operation, thereby increasing the operating range and improving flexibility.

[0036] 2. The mobile platform of the present invention is specially designed to integrate the gearbox, drive motor and half shaft together, and transmit power to the rear axle frame through a hydraulic hose between the engine, which greatly increases the movement range of the rear axle frame, simplifies the complex mechanical structure, and is compact and small in size;

[0037] 3. Since the rear axle frame and the front axle frame are located on the same side during operation, and are located on both sides of the upper body or the lower body relative to the working device, the rear axle frame and the front axle frame, as well as the rear wheels and the front axle frame wheels can replace the counterweight to reduce manufacturing costs.

[0038] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0039] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0041] Figure 1 is a schematic diagram of an existing wheel-crawler excavator;

[0042] Figure 2 It is a schematic diagram of the connection between the rear axle frame, the engine and the main pump in an existing excavator;

[0043] Figure 3 is a schematic diagram of a mobile platform according to an embodiment of the present invention, the schematic diagram also shows related working devices and a cab in the upper vehicle body, and the mobile platform is in a front and rear wheel walking state at this time;

[0044] Figure 4 is another 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 vehicle body, at this time the mobile platform is in a crawler walking state and the working device and the front and rear wheels are respectively located on both sides of the upper vehicle body; and

[0045] Figure 5 The figure is a schematic diagram of the connection between the rear axle frame, the engine, the main pump and the rear wheels in a mobile platform according to an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 10: Excavator;

[0048] 11: working device;

[0049] 12: Upper body;

[0050] 13: Lower body;

[0051] 14: front axle;

[0052] 15: rear axle;

[0053] 16: front wheel;

[0054] 100: mobile platform;

[0055] 110: upper frame assembly;

[0056] 120: rear axle frame;

[0057] 121: rear wheel;

[0058] 130: lower frame assembly;

[0059] 131: Tracks;

[0060] 140: slewing bearing mechanism;

[0061] 150: front axle frame;

[0062] 151: front wheel;

[0063] 160: Rear axle lifting cylinder;

[0064] 161: first rotating arm;

[0065] 162: second rotating arm;

[0066] 163: front axle lifting cylinder;

[0067] 171: Hydraulic hose;

[0068] 172: driving motor;

[0069] 173: Gearbox;

[0070] MA: upper body;

[0071] MB: lower body;

[0072] MC: working device;

[0073] MD: operating tools;

[0074] ME: Engine;

[0075] MF: main pump;

[0076] MG: half shaft;

[0077] W1: first position;

[0078] W2: second position;

[0079] W3: third position;

[0080] W4: fourth position;

[0081] 200: Excavator. DETAILED DESCRIPTION

[0082] By referring to the exemplary embodiments, the objects and functions of the present invention and the methods for achieving these objects and functions will be explained. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The essence of the description is only to help those skilled in the relevant art to comprehensively understand the specific details of the present invention.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0084] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0085] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0086] The present invention provides a mobile platform 100 for wheel-crawler engineering machinery. The mobile platform 100 can be applied to the field of engineering machinery, especially wheel-crawler engineering machinery, to solve the problem of interference and collision between the working device and the front axle frame and the front wheel of the existing wheel-crawler engineering machinery during operation.

[0087] For ease of explanation, this embodiment will take an excavator as an example of a wheel-crawler engineering machinery in the following description, but this is not a limitation and may also be an engineering machinery that adopts a wheel-crawler dual movement mode, such as a scraper, a loader or a bulldozer.

[0088] Common excavators are generally composed of three major parts: working device, upper body and lower body. The specific structure includes power device, working device, slewing bearing mechanism, operating mechanism, transmission mechanism, walking device and auxiliary facilities. According to their structure and use, they can be divided into crawler type, tire type, walking type, full hydraulic, semi-hydraulic, full rotary, non-full rotary, general type, special type, articulated type and telescopic arm type.

[0089] Among them, the traveling device is the chassis, including the crawler frame and the traveling system, which is mainly composed of the crawler frame, the traveling motor plus the reducer and its pipeline, the driving wheel, the guide wheel, the sprocket wheel, the supporting roller, the crawler, the tensioning buffer device, etc. Its function is to support the weight of the excavator and convert the power transmitted by the driving wheel into traction to realize the travel of the whole machine. The frame assembly (i.e. the crawler frame assembly) is generally an integral welded part and can adopt an X-shaped structure. Its main advantage is that it has a high load-bearing capacity. The frame assembly is welded from three parts: the left longitudinal beam (i.e. the left crawler frame), the main frame (i.e. the middle frame), and the right longitudinal beam (i.e. the right crawler frame).

[0090] In a preferred embodiment, Figure 3 and Figure 4 As shown, Figure 3 is a schematic diagram of a mobile platform 100 according to an embodiment of the present invention, the schematic diagram also shows the related working device MC and the cab in the upper vehicle body MA, at this time, the mobile platform 100 is in the state of walking with the front and rear wheels 121; Figure 4 1 is another schematic diagram of a mobile platform 100 according to an embodiment of the present invention, which also shows the related working device MC and the cab in the upper vehicle body MA, at which time the mobile platform 100 is in a crawler 131 walking state and the working device MC and the front and rear wheels 121 are respectively located on both 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.

[0091] The upper frame assembly 110 is an important prior art structure in the upper body MA of the excavator, and is used to rotatably install the rear axle frame 120. The rear axle frame 120 is used to rotatably connect the rear wheel 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 install the crawler 131 and the front axle frame 150. The front axle frame 150 is used to rotatably connect the front wheel 151.

[0092] Specifically, the upper frame assembly 110 is an important component structure at the bottom of the upper body MA of the excavator. The upper frame assembly 110 is generally provided with a cab and an engine compartment, which is a prior art device in the excavator and will not be described in detail herein. The front end of the upper frame assembly 110 is used to be rotatably connected to the working device MC. Generally speaking, the working device MC of the excavator includes a boom, a dipper arm and working accessories MD. Among them, the working accessories MD commonly include buckets, grabs, leveling buckets, rake teeth, crushing cones, twist drills, electromagnetic suction cups, vibrators, bulldozers, impact shovels, container forks, capstans or draglines, which are not limited here to meet the needs of various constructions.

[0093] The rear axle frame 120 connected to the rear wheel 121 is also an important component structure of the excavator, and it can adopt the existing technical device. 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 extending direction and a third position W3 located above the first position W1.

[0094] The lower vehicle body MB includes a lower frame assembly 130 and crawlers 131 arranged on the left and right sides of the lower frame assembly 130. The crawlers 131 are generally bidirectional crawlers 131. The top of the lower frame assembly 130 is rotatably connected to the upper frame assembly 110 via a slewing bearing mechanism 140. The slewing bearing mechanism 140 is also an important component structure of the excavator, and it can adopt an existing technical device.

[0095] The upper frame assembly 110 can rotate at least 180° relative to the lower frame assembly 130 in the horizontal plane through the slewing support mechanism 140, so that the rear axle frame 120 and the front axle frame 150 (to be described below) can be simultaneously mounted on the same side of the vehicle body MA or the lower body MB. Preferably, the upper frame assembly 110 and the lower frame assembly 130 can rotate 360° relative to each other in the horizontal plane. There are many ways to realize that the upper frame assembly 110 and the lower frame assembly 130 can rotate at least 180° relative to each other in the horizontal plane. Generally speaking, the common design is that the lower frame assembly 130 does not rotate, and the upper frame assembly 110 can rotate at least 180° relative to the lower frame assembly 130. Logically speaking, the upper frame assembly 110 can also not rotate, and the lower frame assembly 130 can rotate at least 180° relative to the upper frame assembly 110. Alternatively, both the upper frame assembly 110 and the lower frame assembly 130 can rotate, and the two can rotate at least 180 degrees relative to each other, which can reduce the time spent on the rotation.

[0096] The front axle frame 150 connected to the front wheel 151 is also an important component structure of the excavator. It can adopt the existing technical device to drive the front wheel 151 to rotate by transmitting the power of the power device. The other end of the front axle frame 150 is rotatably connected to the front end of the lower frame assembly 130. The front axle frame 150 is rotatable relative to the lower body MB between a second position W2 in the downward extending direction and a fourth position W4 located above the second position W2.

[0097] The bottom ends of the rear wheel 121 connected to the rear axle frame 120 in the first position W1 and the front wheel 151 connected to the front axle frame 150 in the second position W2 are both lower than the bottom edge of the crawler track 131, so that the mobile platform 100 moves through the front wheel 151 and the rear wheel 121. The bottom ends of the rear wheel 121 connected to the rear axle frame 120 in the third position W3 and the front wheel 151 connected to the front axle frame 150 in the fourth position W4 are both higher than the bottom edge of the crawler track 131, so that the mobile platform 100 moves through the crawler track 131.

[0098] According to the mobile platform 100 of the present invention, when the rear axle frame 120 is in the first position W1 and the front axle frame 150 is in the second position W2, the front wheels 151 and the rear wheels 121 are respectively located on both sides of the upper body MA or the lower body MB, and the mobile platform 100 can be moved by the front wheels 151 and the rear wheels 121. Before the wheel-crawler engineering machinery operates, the rear axle frame 120 is first rotated upward to the third position W3, and the front axle frame 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 support mechanism 140, so that the rear axle frame 120 and the front axle frame 150 are located on the same side of the upper body MA or the lower body MB, and are respectively located on both sides of the upper body MA or the lower body MB with the working device MC. In this way, when the wheel-crawler engineering machinery is operating, the working device MC and the front axle frame 150 and the front wheels 151 will not interfere with or collide with each other, thereby increasing the operating range and improving flexibility.

[0099] It should be noted that the embodiment of the present invention does not limit the specific types of the rear axle frame 120 and the front axle frame 150. For example, the rear axle frame 120 and the front axle frame 150 may not be drive axles, may both be drive axles, or may one of them be a drive axle. For example, when the rear axle frame 120 is a drive axle and the front axle frame 150 is not a drive axle, the rear wheel 121 is a drive wheel and the front wheel 151 is a passive wheel.

[0100] In order to realize the respective rotations of the rear bridge frame 120 and the front bridge frame 150 , the mobile platform 100 may further include a first driving mechanism and a second driving mechanism.

[0101] The first driving mechanism is connected to the upper frame assembly 110, and is used to drive the rear axle frame 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 frame 150 to rotate relative to the lower vehicle body MB between the second position W2 and the fourth position W4. The specific types of the first driving mechanism and the second driving mechanism may not be limited.

[0102] In order to provide a simple and practical first driving mechanism and second driving mechanism, the first driving mechanism may include a rear axle lifting cylinder 160 , and the second driving mechanism may include a front axle lifting cylinder 163 .

[0103] refer to Figure 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 ends of the first rotating arm 161 and the second rotating arm 162 are rotatably connected to the rear axle frame 120 respectively. Among them, the connection position of the first rotating arm 161 and the rear axle frame 120 is closer to the rotation connection between the rear axle frame 120 and the upper frame assembly 110 than the connection position of the second rotating arm 162 and the rear axle frame 120. Generally speaking, the length of the first rotating arm 161 is shorter than that of the second rotating arm 162.

[0104] refer to Figure 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 .

[0105] Continue to refer Figure 3 , the front axle lifting cylinder 163 is in an extended state, so that the front axle frame 150 extends downward and is in the second position W2. The rear axle lifting cylinder 160 is in an extended state, so that the rear axle frame 120 also extends downward and is in the first position W1. At this time, the bottom ends of the front wheels 151 and the rear wheels 121 are both lower than the bottom edge of the track 131, and the front wheels 151 and the rear wheels 121 are respectively located on both sides of the upper vehicle body MA or the lower vehicle body MB, and the mobile platform 100 can move through the front wheels 151 and the rear wheels 121.

[0106] Then, continue to refer to Figure 4 , the rear axle lifting cylinder 160 is retracted to rotate the rear axle frame 120 up off the ground and to the third position W3, and the front axle lifting cylinder 163 is retracted to rotate the front axle frame 150 up off the ground and to the fourth position W4, and then the upper frame assembly 110 is rotated 180° relative to the lower frame assembly 130 through the excavator's own slewing support mechanism 140, so that the rear axle frame 120 and the front axle frame 150 are on the same side of the upper body MA or the lower body MB, and the rear wheel 121 and the front wheel 151 are also on the same side of the upper body MA or the lower body MB. At this time, the working device MC and the front axle frame 150 and the front wheel 151 are on opposite sides, and the working device MC will not interfere with the front axle frame 150 and the front wheel 151 during operation, which increases the operating range and improves flexibility.

[0107] When the rear axle frame 120 adopts a driving axle capable of driving the rear wheels to rotate, Figure 2 , Figure 2The figure is a schematic diagram of the connection between the rear axle frame, the engine and the main pump in the existing excavator. The existing rear axle frame for excavators generally adopts a transmission method in which the drive motor and the gearbox are installed together, and the gearbox and the rear axle are mechanically connected through a transmission shaft. Since the lifting range of the rear axle frame using the mechanical hard connection method is small, the use effect is affected.

[0108] To solve the above problems, refer to Figure 5 The rear axle frame 120 of the embodiment of the present invention can be constructed as follows: the drive motor 172 is connected to the main pump MF of the excavator through the hydraulic hose 171. The main pump MF is connected to the engine ME of the excavator. The drive motor 172 is arranged on the housing of the gearbox 173. The gearbox 173 is connected to the drive motor 172 by power. The gearbox 173 is arranged on the half-shaft MG connected to the rear wheel 121 and is connected to the half-shaft MG by power. Among them, the half-shaft MG is a prior art device. The gearbox 173 converts the power transmitted by the drive motor 172 into torque and speed and then transmits it to the half-shaft MG, and drives the rear wheel 121 to rotate through the half-shaft MG.

[0109] Since the rear axle frame 120 of the embodiment of the present invention integrates the gearbox 173, the drive motor 172 and the half-axle MG together, power is transmitted between it and the engine ME through the hydraulic hose 171, and speed control can be achieved through the hydraulic hose 171, avoiding mechanical hard connection, greatly increasing the movement range of the rear axle frame 120, reducing complex mechanical structures, and making the size compact and small.

[0110] When the rear axle frame 120 rotates upward to the third position W3 and the front axle frame 150 rotates upward to the fourth position W4, preferably, the rear axle frame 120 at the third position W3 is located above the front axle frame 150 at the fourth position W4. Further, the rear axle frame 120 at the third position W3 can at least partially move above the upper frame assembly 110.

[0111] In summary, according to the mobile platform 100 of the present invention, when the rear axle frame 120 and the front axle frame 150 are respectively in the first position W1 and the second position W2, the mobile platform 100 can be moved by 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 vehicle body MA or the lower vehicle body MB through the slewing support mechanism 140, so that the working device MC and the front axle frame 150 and the front wheel 151 will not interfere with or collide during operation, thereby increasing the operating range and improving 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 respectively located on both sides of the upper vehicle body MA or the lower vehicle body MB relative to the working device MC, the rear axle frame 120 and the front axle frame 150, as well as the rear wheel 121 and the front axle frame 150 can act as counterweights at this time, reducing manufacturing costs. In addition, the mobile platform 100 of the present invention is specially designed to integrate the gearbox 173, the drive motor 172 and the half-axle MG together, and the rear axle frame 120 transmits power to the engine ME through the hydraulic hose 171, which greatly increases the movement range of the rear axle frame 120, simplifies the complex mechanical structure, and is compact and small.

[0112] refer to Figure 4 In a second aspect, the present invention further provides a wheel-crawler excavator 200, comprising the mobile platform 100 of the above embodiment.

[0113] Since the excavator according to the embodiment of the present invention includes the mobile platform 100 of the above embodiment, all the features and effects of the mobile platform 100 are included, which will not be described in detail herein.

[0114] Other embodiments of the present invention will be readily apparent to those skilled in the art from the description and practice of the invention disclosed herein. The description and embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are to be limited by the claims.

Claims

1. A mobile platform for wheel-crawler engineering machinery, It is characterized in that The mobile platform comprises: An upper vehicle body, wherein the upper vehicle body comprises an upper frame assembly, the upper frame assembly is located at the bottom of the upper vehicle body, and the front end of the upper frame assembly is used to connect to the working device; A lower vehicle body, the lower vehicle body comprising a lower frame assembly and crawlers arranged on the left and right sides of the lower frame assembly, the top of the lower frame assembly being rotatably connected to the upper frame assembly via a slewing bearing mechanism; A rear axle frame connected to the rear wheel, the other end of the rear axle frame being rotatably connected to the rear end of the upper frame assembly, the rear axle frame being rotatable relative to the upper body between a first position in a downward extending direction and a third position located above the first position; A front axle frame connected to the front wheel, the other end of the front axle frame being rotatably connected to the front end of the lower frame assembly, the front axle frame being rotatable relative to the lower body between a second position in a downward extending direction and a fourth position located above the second position; The upper frame assembly is configured to be rotatable at least 180° in a horizontal plane relative to the lower frame assembly, so that the rear axle frame can be located on the same side as the front axle frame when in the third position; Among them, the bottom ends of the rear wheels connected to the rear axle frame when in the first position and the front wheels connected to the front axle frame when in the second position are both lower than the bottom edge of the track, so that the mobile platform moves through the front wheels and the rear wheels; the bottom ends of the rear wheels connected to the rear axle frame when in the third position and the front wheels connected to the front axle frame when in the fourth position are both higher than the bottom edge of the track, so that the mobile platform moves through the track.

2. The mobile platform according to claim 1, It is characterized in that Also includes: a first drive mechanism connected to the upper frame assembly, for driving the rear axle frame to rotate relative to the upper body between a first position and a third position; A second drive mechanism connected to the lower frame assembly is used to drive the front axle frame to rotate relative to the lower body between the second position and the fourth position.

3. The mobile platform according to claim 2, It is characterized in that The first driving mechanism shown comprises: A rear axle lifting cylinder connected to the upper frame assembly, wherein the output shaft of the rear axle lifting cylinder is rotatably connected to a first rotating arm and a second rotating arm respectively, and the other ends of the first rotating arm and the second rotating arm are rotatably connected to the rear axle frame respectively; wherein the connection position of the first rotating arm and the rear axle frame is closer to the rotation connection between the rear axle frame and the upper frame assembly than the connection position of the second rotating arm and the rear axle frame; The second driving mechanism shown comprises: A front axle lifting cylinder, one end of which is rotatably connected to the lower frame assembly, and the other end of which is rotatably connected to the front axle frame.

4. The mobile platform according to claim 1, It is characterized in that The rear axle frame comprises: A drive motor used for being connected to the main pump of the engineering machinery through a hydraulic hose, wherein the drive motor is arranged on a housing of the gearbox; A gearbox is connected to the driving motor power, and the gearbox is arranged on a half shaft connected to the rear wheel and is power connected to the half shaft.

5. The mobile platform according to claim 1, It is characterized in that The rear axle frame when in the third position is located above the front axle frame when in the fourth position.

6. The mobile platform according to claim 1, It is characterized in that The upper frame assembly can rotate 360 ​​degrees in a horizontal plane relative to the lower frame assembly.

7. The mobile platform according to claim 1, It is characterized in that The engineering machinery is an excavator, a scraper, a loader or a bulldozer.

8. The mobile platform according to claim 1, It is characterized in that When the engineering machinery is an excavator, the working accessories of the working device are a bucket, a grab bucket, a leveling bucket, rake teeth, a crushing cone, a twist drill, an electromagnetic suction cup, a vibrator, a bulldozer, an impact shovel, a container fork, a capstan or a drag shovel to meet various construction needs.

9. A wheel-crawler engineering machine, It is characterized in that Comprising a mobile platform as claimed in any one of claims 1 to 8.

10. The construction machine according to claim 9, It is characterized in that The front end of the upper frame assembly is rotatably connected to the working attachment of the working device through a large arm and a small arm that are hinged to each other.

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