Underground coal car

Abstract

The invention relates to the technical field of coal cars, in particular to an underground coal car. The underground coal car comprises a front car frame, a rear car frame, a first driving assembly, a second driving assembly and a battery assembly, wherein the front car frame is provided with a cab; the rear frame is movably connected with the front frame; a container is arranged on the rear frame; the first driving assembly is located on the front frame and comprises a first driving wheel and a wheel edge driving assembly, and the wheel edge driving assembly is used for driving the first driving wheel to rotate; the second driving assembly is located on the rear frame and comprises a second driving wheel and a hydraulic auxiliary driving system, and the hydraulic auxiliary driving system is used for driving the second driving wheel to rotate; the battery assembly is installed on the front frame and used for providing power for the first driving assembly. The underground coal car provided by the invention can completely replace a shuttle car, and can freely pass underground under the condition of getting rid of the limitation of a cable, so that the operation efficiency of the underground coal car is improved, and the production efficiency of an underground room-pillar type coal mine is further greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal transportation vehicles, and in particular to an underground coal transportation vehicle. Background Art

[0002] The "room and pillar" coal mining method belongs to one of the "short wall" coal mining processes, which is characterized by criss-crossing roadways and reserved square coal pillars for supporting the roof.

[0003] The shuttle car that plays a role in coal transportation in the "room and pillar" coal mining method needs to run in a plug-in form. Therefore, the moving range of the shuttle car is limited by the cable length. Thus, the transportation efficiency of the shuttle car during underground coal transportation is low, and as a result, the existing shuttle cars cannot ensure the production efficiency of "room and pillar" coal mining. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] To this end, the present invention provides an underground coal transportation vehicle, which can completely replace the shuttle car and can move freely underground without being restricted by cables, thereby improving the production efficiency of "room and pillar" coal mines underground.

[0006] An underground coal transportation vehicle according to an embodiment of the present invention includes: A front frame provided with a cab; A rear frame movably connected to the front frame; a cargo box is provided on the rear frame; A first drive assembly located on the front frame, including a first drive wheel and a wheel-side drive assembly for driving the first drive wheel to rotate; A second drive assembly located on the rear frame, including a second drive wheel and a hydraulic auxiliary drive system for driving the second drive wheel to rotate; A battery assembly installed on the front frame for providing power to the first drive assembly.

[0007] Optionally, the battery assembly includes: A lithium battery pack including at least two explosion-proof lithium battery boxes and connectors for connecting at least two explosion-proof lithium battery boxes; A mounting support installed on the lithium battery pack for supporting the lithium battery pack.

[0008] Optionally, the battery assembly is installed on the front frame through a battery bracket; the battery bracket includes: A bottom plate for placing the lithium battery pack, and the mounting support is detachably fixed on the bottom plate; A retaining frame, and two retaining frames are respectively connected to the two opposite sides of the bottom plate in a one-to-one correspondence; The connecting plate is connected to the bottom plate at the bottom and is respectively connected to two retaining frames on both sides. The connecting plate is used to connect to the front end of the front frame.

[0009] Optionally, the wheel side drive assembly includes: The steering knuckle is movably connected to the front frame through an upper H-arm at the top and is movably connected to the front frame through a lower H-arm at the bottom; The wheel side reducer is installed on the side of the steering knuckle away from the front frame, and the wheel side reducer is connected to the first driving wheel; The parallel shaft reducer is installed on the side of the steering knuckle close to the front frame and is located between the upper H-arm and the lower H-arm; the parallel shaft reducer is connected to the wheel side reducer through a spline; The drive motor is drivingly connected to the parallel shaft reducer and is electrically connected to the battery assembly; the drive motor is used to drive the rotation of the rotating shaft of the parallel shaft reducer.

[0010] Optionally, it further includes a suspension system, and the suspension system is respectively connected to the front frame and the steering knuckle; the suspension system is used to transmit the force and torque acting between the steering knuckle and the front frame.

[0011] Optionally, the hydraulic auxiliary drive system includes: The hydraulic motor is arranged on the rear frame and is used to drive the second driving wheel to rotate; The hydraulic oil pump is installed at the power take-off interface of the parallel shaft reducer and is used to provide power for the hydraulic motor.

[0012] Optionally, the cargo box includes: The box body is installed on the rear frame; The material pushing mechanism is arranged in the box body and is used to push the material in the box body out of the box body.

[0013] Optionally, the front frame and the rear frame are movably connected through a hinge frame, and the hinge frame includes: The connecting part is connected to the side surface of the front frame close to the rear frame, The frame body is connected to the side surface of the rear frame close to the front frame; the frame body is hinged to the connecting part; Two oil cylinders are symmetrically arranged with the longitudinal axis of the rear frame as the center line and are respectively located on both sides of the frame body; wherein, one end of each oil cylinder is connected to the rear frame, and the other end of each oil cylinder is connected to the connecting part; the rear frame can move left and right relative to the longitudinal axis of the front frame with the telescopic movement of the two oil cylinders.

[0014] Optionally, a slewing bearing part is provided at the position where the front frame is connected to the connecting part, and the slewing bearing part is used for the connecting part to be rotatably connected to the front frame with the axis of the slewing bearing part as the rotation center.

[0015] Optionally, the longitudinal center line of the cab is parallel to the longitudinal center line of the front frame; the seat in the cab faces the longitudinal center line of the front frame.

[0016] One of the above technical solutions has at least the following advantages or beneficial effects: For the underground coal transporter of the embodiment of the present invention, by arranging the battery assembly on the front frame, the in-wheel drive assembly located on the front frame can drive the first driving wheel to rotate under the power supply of the battery assembly, so that the underground coal transporter is freed from the limitation of cables, and thus the problems that the traveling route and driving distance of the underground coal transporter are limited are solved; at the same time, the second driving wheel is driven to rotate by the hydraulic auxiliary drive system to ensure that when the first driving assembly cannot drive the underground coal transporter to travel normally, the second driving wheel is driven to rotate by the hydraulic auxiliary drive system to ensure that the underground coal transporter can still travel normally during the operation without continuous power supply of cables; in short, the underground coal transporter provided by this application can completely replace the shuttle car, and can freely travel underground without being restricted by cables, improving the operation efficiency of the underground coal transporter, and thus greatly improving the production efficiency of the "room and pillar" coal mine underground. Description of the Drawings

[0017] Figure 1 The structural schematic diagram of the underground coal transporter according to an embodiment provided by the present invention is shown; Figure 2 Shown Figure 1 The top view of the underground coal transporter in Figure 3 The structural schematic diagram of the battery assembly according to an embodiment provided by the present invention is shown; Figure 4 Shown Figure 3 The installation schematic diagram of the battery assembly in Figure 5 The structural schematic diagram of the in-wheel drive assembly according to an embodiment provided by the present invention is shown; Figure 6 Shown Figure 5 The installation schematic diagram of the in-wheel drive assembly on the front frame in Figure 7 The structural schematic diagram of the cargo box according to an embodiment provided by the present invention is shown.

[0018]

Explanation of the Reference Numerals

[0019] For better explaining the present invention for easy understanding, the present invention will be described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0020] With the continuous development of the underground coal mining technology, at present, the mainstream "longwall" mining technology is basically adopted in domestic underground coal mines, while some foreign countries still retain the old European "shortwall" coal mining technology. Among them, the "room and pillar" coal mining method belongs to one of the "shortwall" coal mining technologies, and its characteristic is that the roadways crisscross and square coal pillars are reserved to support the roof. The disadvantage of the "room and pillar" coal mining method is the low coal output (less than 30%), and the advantage is that it can protect the natural environment to the greatest extent and avoid the collapse of the ground due to coal mining.

[0021] At present, the shuttle car is the mainstream coal transportation tool used in underground coal mines, and is used in supporting with continuous miner, crusher, belt conveyor, etc., playing the role of a transmission bridge for the materials between the continuous miner and the crusher. However, the existing shuttle cars generally operate in a plug-in form. Limited by the cable length, the transportation distance can only meet within 200m. The shuttle cars have the problem of being restricted in the walking route and driving distance. Therefore, the transportation efficiency of the shuttle cars is relatively low when transporting underground coal, so the existing shuttle cars cannot guarantee the production efficiency of the "room and pillar" coal mining.

[0022] The present invention aims to develop a pure electric underground coal transportation vehicle. The whole vehicle power energy is directly provided by an explosion-proof lithium battery, getting rid of the limitation of the cable. The walking route and driving distance of the vehicle are not restricted, which can greatly improve the production efficiency of the underground room and pillar coal mine. The present invention adopts a brand-new technical route and can completely replace the shuttle car.

[0023] In order to solve at least one of the technical problems existing in the prior art or related technology, the present invention provides an underground coal truck, which includes a front frame, a rear frame, a first drive assembly, a second drive assembly and a battery assembly. The front frame is provided with a cab; the rear frame is movably connected to the front frame; the rear frame is provided with a cargo box; the first drive assembly is located on the front frame, including a first drive wheel and a wheel-side drive assembly, and the wheel-side drive assembly is used to drive the first drive wheel to rotate; the second drive assembly is located on the rear frame, including a second drive wheel and a hydraulic auxiliary drive system, and the hydraulic auxiliary drive system is used to drive the second drive wheel to rotate; the battery assembly is installed on the front frame to provide power for the first drive assembly. By arranging a battery assembly on the front frame, the present invention can enable the wheel-side drive assembly located on the front frame to drive the first drive wheel to rotate under the power supply of the battery assembly, so that the underground coal truck is free from the restriction of cables, thereby solving the problem of limited walking route and driving distance of the underground coal truck; at the same time, the second drive wheel is driven to rotate by the hydraulic auxiliary drive system to ensure that when the first drive assembly cannot drive the underground coal truck to travel normally, the second drive wheel is driven to rotate by the hydraulic auxiliary drive system to ensure that the underground coal truck can travel normally during operation without continuous power supply from cables; in short, the underground coal truck provided by the present application can completely replace the shuttle car, can travel freely underground without the restriction of cables, improve the operating efficiency of the underground coal truck, and thus greatly improve the production efficiency of underground "room-and-pillar" coal mines.

[0024] The following describes some embodiments of underground coal transport vehicles according to the present invention with reference to the accompanying drawings.

[0025] See also Figures 1 to 7 The present invention provides an underground coal transport vehicle, comprising a front frame 1, a rear frame 2, a first drive assembly, a second drive assembly and a battery assembly 3, wherein the front frame 1 is provided with a cab 4; the rear frame 2 is movably connected to the front frame 1; a cargo box 5 is provided on the rear frame 2; the first drive assembly is located on the front frame 1, comprising a first drive wheel 6 and a wheel-side drive assembly 9, and the wheel-side drive assembly 9 is used to drive the first drive wheel 6 to rotate; the second drive assembly is located on the rear frame 2, comprising a second drive wheel 7 and a hydraulic auxiliary drive system, and the hydraulic auxiliary drive system is used to drive the second drive wheel 7 to rotate; the battery assembly 3 is installed on the front frame 1, and is used to provide power for the first drive assembly.

[0026] Among them, the underground coal truck is equipped with a hydraulic steering system to realize the vehicle steering function through the hydraulic steering system.

[0027] It should be noted that the driving model of the underground coal truck includes a normal mode and an escape mode, wherein the escape mode is the mode selected when the underground coal truck cannot drive in the normal mode.

[0028] When the underground coal truck is traveling in the normal mode, the hydraulic assisted drive system does not drive the second drive wheel 7 to rotate; when the underground coal truck is traveling in the escape mode, the hydraulic assisted drive system drives the second drive wheel 7 to rotate; specifically, when the underground coal truck is traveling in the normal mode, only the first drive wheel 6 is driven to rotate by the wheel-side drive assembly 9, thereby realizing the two-wheel drive driving of the underground coal truck; when the underground coal truck is traveling in the escape mode, the first drive wheel 6 is driven to rotate by the wheel-side drive assembly 9, and the hydraulic assisted drive system drives the second drive wheel 7 to rotate, thereby realizing the four-wheel drive driving of the underground coal truck.

[0029] In this embodiment, by arranging a battery assembly 3 on the front frame 1, the wheel-side drive assembly 9 located on the front frame 1 can drive the first drive wheel 6 to rotate under the power supply of the battery assembly 3, so that the underground coal truck can get rid of the restriction of the cable, thereby solving the problem of the limited walking route and driving distance of the underground coal truck; at the same time, the second drive wheel 7 is driven to rotate by the hydraulic auxiliary drive system to ensure that when the first drive assembly cannot drive the underground coal truck to travel normally, the second drive wheel 7 is driven to rotate by the hydraulic auxiliary drive system to ensure that the underground coal truck can travel normally during operation without continuous power supply from the cable; in short, the underground coal truck provided by the present application can completely replace the shuttle car, can get rid of the restriction of the cable, can travel freely underground, improve the operating efficiency of the underground coal truck, and thus greatly improve the production efficiency of the underground "room and pillar" coal mine.

[0030] In some possible implementations, see Figure 3 The battery assembly 3 includes a lithium battery pack and a mounting bracket 303. The lithium battery pack includes at least two explosion-proof lithium battery boxes 301 and a connector 302 for connecting at least two explosion-proof lithium battery boxes 301. The mounting bracket 303 is installed on the lithium battery pack to support the lithium battery pack.

[0031] Here, there may be six explosion-proof lithium battery boxes 301 .

[0032] Among them, a high-voltage electrical box 304 is installed on one side of the lithium battery pack; the high-voltage electrical box 304 is provided with a first plug interface and a second plug interface, the first plug interface can be connected to the first drive wheel 6 through a wiring harness, and the second plug interface is used to connect to the charging device.

[0033] In this embodiment, by selecting the lithium battery pack as at least two explosion-proof lithium battery boxes 301, the lithium battery pack can be prevented from exploding, thereby improving the safety of the underground coal truck during operation; at the same time, by installing a support 303 on the lithium battery pack to support the lithium battery pack, the bottom of the lithium battery pack is prevented from contacting with the components used to install the lithium battery pack, thereby improving the safety of the lithium battery pack.

[0034] For further information, seeFigure 4 , the battery assembly 3 is installed on the front frame 1 through the battery bracket 8; the battery bracket 8 includes a bottom plate 801, a retaining frame 802 and a connecting plate 803. The bottom plate 801 is used to place the lithium battery pack, and the mounting seat 303 is detachably fixed on the bottom plate 801; the two retaining frames 802 are respectively connected to the two opposite sides of the bottom plate 801 in a one-to-one correspondence; the bottom of the connecting plate 803 is connected to the bottom plate 801, and the two sides of the connecting plate 803 are respectively connected to the two retaining frames 802 correspondingly. The connecting plate 803 is used to connect to the front end of the front frame 1.

[0035] Here, the mounting seat 303 is detachably fixed on the bottom plate 801 by bolts; the two retaining frames 802 are respectively located on both sides of the longitudinal center line of the underground coal hauling vehicle.

[0036] It should be noted that the battery assembly 3 is provided with a lifting ring 305. When placing the battery assembly 3 on the battery bracket 8, first connect the lifting device and the lifting ring 305, and then lift the battery assembly 3 into the battery bracket 8 through the lifting device to complete the placement of the battery assembly 3 in the battery bracket 8.

[0037] In this embodiment, by detachably fixing the mounting seat 303 on the battery assembly 3 to the bottom plate 801, the battery assembly 3 can be stably fixed on the bottom plate 801; at the same time, by respectively connecting the two retaining frames 802 to the two opposite sides of the bottom plate 801 in a one-to-one correspondence, the battery assembly 3 is further fixed on the battery bracket 8. At the same time, it can also prevent the two sides of the battery assembly 3 placed in the battery bracket 8 from being contacted by other objects and being damaged, improving the safety of the battery assembly 3 installed on the underground coal hauling vehicle; in addition, by connecting the connecting plate 803 of the battery bracket 8 to the front end of the front frame 1, the battery assembly 3 can be installed at the frontmost position of the underground coal hauling vehicle, which not only facilitates the installation of the battery assembly 3 on the underground coal hauling vehicle, but also can realize the reasonable layout of the installation position of the battery assembly 3 on the underground coal hauling vehicle.

[0038] In some possible embodiments, refer to Figure 5 and Figure 6, the wheel-side drive assembly 9 includes a steering knuckle 901, a wheel-side reducer 902, a parallel-axis reducer 903, and a drive motor 904. The top of the steering knuckle 901 is movably connected to the front frame 1 through an upper H-arm 10, and the bottom of the steering knuckle 901 is movably connected to the front frame 1 through a lower H-arm 11; the wheel-side reducer 902 is installed on the side of the steering knuckle 901 away from the front frame 1, and the wheel-side reducer 902 is connected to the first drive wheel 6; the parallel-axis reducer 903 is installed on the side of the steering knuckle 901 close to the front frame 1 and is located between the upper H-arm 10 and the lower H-arm 11; the parallel-axis reducer 903 is connected to the wheel-side reducer 902 through a spline; the drive motor 904 is drivingly connected to the parallel-axis reducer 903 and is electrically connected to the battery assembly 3; the drive motor 904 is used to drive the rotation of the rotating shaft of the parallel-axis reducer 903.

[0039] It should be noted that after the two wheel-side drive assemblies 9 are installed on the underground coal transport vehicle, the two upper H-arms 10 are symmetrically arranged with respect to the longitudinal center line of the underground coal transport vehicle, and the two lower H-arms 11 are also symmetrically arranged with respect to the longitudinal center line of the underground coal transport vehicle.

[0040] In this embodiment, by movably connecting the top of the steering knuckle 901 to the front frame 1 through the upper H-arm 10 and the bottom of the steering knuckle 901 to the front frame 1 through the lower H-arm 11, and installing the parallel-axis reducer 903 between the upper H-arm 10 and the lower H-arm 11, it is possible to achieve the up-and-down swing of the wheel-side reducer 902, the parallel-axis reducer 903, and the drive motor 904 installed on the steering knuckle 901 relative to the front frame 1, so as to achieve the purpose of shock absorption and noise reduction of the front frame 1 and the wheel-side drive system. At the same time, the double-H-arm connection structure formed by the upper H-arm 10 and the lower H-arm 11 can also meet the strength requirements under working conditions such as vertical impact, extreme braking, extreme steering, and steering braking downhill.

[0041] Furthermore, the underground coal transport vehicle further includes a suspension system 12, and the suspension system 12 is respectively connected to the front frame 1 and the steering knuckle 901; the suspension system 12 is used to transmit the force and torque acting between the steering knuckle 901 and the front frame 1.

[0042] It should be noted that the suspension system 12 includes two suspension cylinders 1201 and an accumulator 1202. The first ends of the two suspension cylinders 1201 are both movably connected to the front frame 1, and the second ends of the two suspension cylinders 1201 are both movably connected to the steering knuckle 901; the accumulator 1202 is connected to both suspension cylinders 1201, and the accumulator 1202 is used to keep the internal pressures of the two suspension cylinders 1201 the same.

[0043] In this embodiment, by connecting the suspension system 12 to the front frame 1 and the steering knuckle 901 respectively, so that the suspension system 12 transmits the force and torque between the steering knuckle 901 and the front frame 1, the direct impact on the underground coal truck caused by road unevenness can be alleviated. When the underground coal truck steers, is fully loaded or under heavy load, the setting of the buffering force provided by the suspension system 12 can reduce the wear of the tires, improve the service life of the tires, and facilitate the long-term stable operation of the coal truck.

[0044] Furthermore, the hydraulic auxiliary drive system includes a hydraulic motor and a hydraulic oil pump 13. The hydraulic motor is arranged on the rear frame 2 and is used to drive the second drive wheel 7 to rotate; the hydraulic oil pump 13 is installed at the power take-off interface of the parallel shaft reducer 903, and the hydraulic oil pump 13 is used to provide power for the hydraulic motor.

[0045] Here, by installing the hydraulic oil pump 13 for providing power to the hydraulic motor at the power take-off interface of the parallel shaft reducer 903, the space between the upper H-arm 10 and the lower H-arm 11 can be fully utilized to reasonably arrange the installation position of the hydraulic oil pump 13 on the underground coal truck.

[0046] In some possible embodiments, refer to Figure 7 , the cargo box 5 includes a box body 501 and a pushing mechanism. The box body 501 is installed on the rear frame 2; the pushing mechanism is arranged inside the box body 501, and the pushing mechanism is used to push the materials inside the box body 501 out of the box body 501.

[0047] Among them, a flip-up tailgate 502 is provided at the tail of the cargo box 5; the pushing mechanism includes a pushing plate 503 and a pushing oil cylinder assembly 504. The pushing oil cylinder assembly 504 is used to drive the pushing plate 503 to reciprocate along the length direction of the box body 501; here, before loading the materials into the cargo box 5, the pushing plate 503 is driven by the pushing oil cylinder assembly 504 to move to the side close to the side of the box body 501 away from the tailgate 502; when the materials need to be unloaded from the box body 501, the pushing plate 503 is driven by the pushing oil cylinder assembly 504 to move to the side of the box body 501 close to the tailgate 502, so that the materials inside the box body 501 are pushed out of the box body 501.

[0048] Here, the side of the box body 501 away from the tailgate 502 can be hinged to the rear frame 2, and the box body 501 is also connected to a lifting oil cylinder. The lifting oil cylinder is used to control the height of the side of the box body 501 close to the tailgate 502 to control the flipping of the box body 501 on the rear frame 2.

[0049] In this embodiment, by arranging a pushing mechanism inside the box body 501, it is convenient to push the materials inside the box body 501 out of the box body 501, so as to improve the unloading efficiency of the materials.

[0050] In some possible embodiments, the front frame 1 and the rear frame 2 are movably connected by a hinge frame 14. The hinge frame 14 includes a connecting portion 1401, a frame body 1402, and two oil cylinders 1403. The connecting portion 1401 is connected to a side surface of the front frame 1 close to the rear frame 2. The frame body 1402 is connected to a side surface of the rear frame 2 close to the front frame 1. The frame body 1402 is hinged to the connecting portion 1401. The two oil cylinders 1403 are symmetrically arranged with the longitudinal axis of the rear frame 2 as the center line and are respectively located on both sides of the frame body 1402. Wherein, one end of each oil cylinder 1403 is connected to the rear frame 2, and the other end of each oil cylinder 1403 is connected to the connecting portion 1401. The rear frame 2 can move left and right relative to the longitudinal axis of the front frame 1 along with the telescopic movement of the two oil cylinders 1403.

[0051] Here, the frame body 1402 can be an isosceles triangle frame body. The base of the isosceles triangle frame body is connected to the rear frame 2, and the top angle portion of the isosceles triangle frame body is movably connected to the connecting portion 1401.

[0052] It should be noted that the cylinder barrel of the oil cylinder 1403 is movably connected to the rear frame 2, and the telescopic rod of the oil cylinder 1403 is movably connected to the connecting portion 1401. And the distance between the connection point between the telescopic rod of the oil cylinder 1403 and the connecting portion 1401 and the front frame 1 is less than the distance between the connection point between the frame body 1402 and the connecting portion 1401 and the front frame 1.

[0053] Among them, when controlling the rear frame 2 to move left relative to the longitudinal axis of the front frame 1 along with the telescopic movement of the two oil cylinders 1403, it is possible to control the telescopic rod of the oil cylinder 1403 on the left side of the frame body 1402 to shorten in length and control the telescopic rod of the oil cylinder 1403 on the right side of the frame body 1402 to increase in length, so as to control the rear frame 2 to move left relative to the longitudinal axis of the front frame 1. When controlling the rear frame 2 to move right relative to the longitudinal axis of the front frame 1 along with the telescopic movement of the two oil cylinders 1403, it is possible to control the telescopic rod of the oil cylinder 1403 on the right side of the frame body 1402 to shorten in length and control the telescopic rod of the oil cylinder 1403 on the left side of the frame body 1402 to increase in length, so as to control the rear frame 2 to move right relative to the longitudinal axis of the front frame 1.

[0054] In this embodiment, by selecting the structure of the articulated frame 14 as the connecting part 1401 and the frame body 1402 that can be movably connected to each other, connecting the connecting part 1401 to the front frame 1, and connecting the frame body 1402 to the rear frame 2, the front frame 1 and the rear frame 2 can be movably connected through the cooperation of the connecting part 1401 and the frame body 1402; then, by symmetrically arranging two hydraulic cylinders 1403 with the longitudinal axis of the rear frame 2 as the center line and connecting them to the rear frame 2 and the connecting part 1401 respectively, the left and right movement of the rear frame 2 relative to the longitudinal axis of the front frame 1 can be controlled by these two hydraulic cylinders 1403 to achieve the control of the moving position of the rear frame 2.

[0055] Further, a slewing support part 15 is provided at the position where the front frame 1 is connected to the connecting part 1401. The slewing support part 15 is used for the connecting part 1401 to be rotatably connected to the front frame 1 with the axis of the slewing support part 15 as the rotation center.

[0056] It should be noted that the slewing support part 15 is provided on the front frame 1, and the connecting part 1401 is connected to the slewing support part 15 so that the entire articulated frame 14 can rotate with the axis of the slewing support part 15 as the rotation center.

[0057] In this embodiment, by providing the slewing support part 15 at the position where the front frame 1 is connected to the connecting part 1401, the entire articulated frame 14 provided with the connecting part 1401 can rotate with the axis of the slewing support part 15 as the rotation center, so that the rear frame 2 connected to the articulated frame 14 can deflect relative to the front frame 1 with the axis of the slewing support part 15 as the rotation center, realizing the flexible connection between the front frame 1 and the rear frame 2, and further enabling the entire underground coal transport vehicle to drive smoothly on different road surfaces.

[0058] In some possible embodiments, the length direction of the driver's platform in the cab 4 is parallel to the longitudinal center line of the front frame 1; the orientation of the seat in the cab 4 is facing the longitudinal center line of the front frame 1.

[0059] In this embodiment, by selecting the length direction of the driver's platform in the cab 4 to be parallel to the longitudinal center line of the front frame 1, and selecting the orientation of the seat in the cab 4 to be facing the longitudinal center line of the front frame 1, the driver can face the longitudinal center line of the front frame 1 when driving the underground coal transport vehicle, so as to facilitate the driver to observe the running conditions of the front frame 1 and the rear frame 2 when driving the underground coal transport vehicle.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly defined and limited, when the first feature is "on" or "under" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "embodiment", "exemplary embodiment", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An underground coal transport vehicle, characterized in that: include: The front frame is provided with a cab; A rear frame is movably connected to the front frame; a cargo box is provided on the rear frame; A first driving assembly, located on the front frame, comprises a first driving wheel and a wheel side driving assembly, wherein the wheel side driving assembly is used to drive the first driving wheel to rotate; A second driving assembly, located on the rear frame, comprises a second driving wheel and a hydraulic auxiliary driving system, wherein the hydraulic auxiliary driving system is used to drive the second driving wheel to rotate; A battery assembly is mounted on the front frame and is used to provide power for the first driving assembly.

2. The underground coal transport vehicle according to claim 1, characterized in that: The battery assembly comprises: A lithium battery pack, comprising at least two explosion-proof lithium battery boxes, and a connector for connecting at least two of the explosion-proof lithium battery boxes; The mounting bracket is mounted on the lithium battery pack and is used to support the lithium battery pack.

3. The underground coal transport vehicle according to claim 2, characterized in that: The battery assembly is mounted on the front frame via a battery bracket; the battery bracket comprises: A bottom plate, used for placing the lithium battery pack, and the mounting bracket is detachably fixed to the bottom plate; A retaining frame, wherein two retaining frames are respectively connected to two opposite sides of the bottom plate in a one-to-one correspondence; A connecting plate, the bottom of which is connected to the bottom plate, and the two sides of which are respectively connected to the two blocking frames, wherein the connecting plate is used to be connected to the front end of the front frame.

4. The underground coal transport vehicle according to claim 1, characterized in that: The wheel side drive assembly comprises: Steering knuckle, the top of which is movably connected to the front frame through an upper H arm, and the bottom of which is movably connected to the front frame through a lower H arm; A wheel-side reducer is installed on a side of the steering knuckle away from the front frame, and the wheel-side reducer is connected to the first driving wheel; A parallel shaft reducer is installed on a side of the steering knuckle close to the front frame and is located between the upper H arm and the lower H arm; the parallel shaft reducer is connected to the wheel side reducer via a spline; A drive motor is connected to the parallel shaft reducer in driving connection and is electrically connected to the battery assembly; the drive motor is used to drive the rotating shaft of the parallel shaft reducer to rotate.

5. The underground coal transport vehicle according to claim 4, characterized in that: It also includes a suspension system, which is connected to the front frame and the steering knuckle respectively; the suspension system is used to transmit the force and torque acting between the steering knuckle and the front frame.

6. The underground coal transport vehicle according to claim 4, characterized in that: The hydraulic auxiliary drive system comprises: A hydraulic motor, disposed on the rear frame, for driving the second driving wheel to rotate; A hydraulic oil pump is installed at the power take-off interface of the parallel shaft reducer and is used to provide power for the hydraulic motor.

7. The underground coal transport vehicle according to claim 1, characterized in that: The cargo box comprises: A box body, mounted on the rear frame; The material pushing mechanism is arranged in the box body and is used for pushing the material in the box body out of the box body.

8. The underground coal transport vehicle according to claim 1, characterized in that: The front frame and the rear frame are movably connected via an articulated frame, and the articulated frame comprises: A connecting portion connected to a side surface of the front frame close to the rear frame; A frame body connected to a side surface of the rear frame close to the front frame; the frame body is hinged to the connecting portion; Two oil cylinders are symmetrically arranged with the longitudinal axis of the rear frame as the center line, and are respectively located on both sides of the frame; wherein one end of each of the oil cylinders is connected to the rear frame, and the other end of each of the oil cylinders is connected to the connecting portion; the rear frame can move left and right relative to the longitudinal axis of the front frame as the two oil cylinders extend and retract.

9. The underground coal transport vehicle according to claim 8, characterized in that: A swivel support portion is provided at a position where the front frame is connected to the connecting portion, and the swivel support portion is used for the connecting portion to be rotatably connected to the front frame with the axis of the swivel support portion as the rotation center.

10. The underground coal transport vehicle according to any one of claims 1 to 9, characterized in that: The length direction of the driving platform in the driving cab is parallel to the longitudinal center line of the front frame; the orientation of the seats in the driving cab is facing the longitudinal center line of the front frame.

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