A coal mine roadway track carrying device

Abstract

The coal mine tunnel track carrying device comprises a base assembly and a carrier assembly. The base assembly comprises a base body and a driving wheel connected with the base body, the driving wheel is used for cooperating with the track so that the base body is movable along the track, and the carrier assembly comprises a carrier body which is rotatably connected with the base body around a first axis, the top of the carrier body is provided with a limiting groove, and the first axis is parallel to the height direction of the base assembly. The base assembly and the carrier assembly form a carrying unit, the carrying unit is used for being arranged on two tracks arranged in parallel respectively, and the two limiting grooves are used for jointly carrying an object to be carried. The coal mine tunnel track carrying device has the advantages of convenient carrying and high efficiency.

Description

Technical Field

[0001] This invention belongs to the field of tunnel transportation technology, specifically, it relates to a coal mine tunnel track transport device. Background Technology

[0002] In related technologies, when transporting materials on maintenance tracks in coal mine roadways, manual handling is mostly used due to the limitations of the working environment. This is especially true for transporting long materials such as cement sleepers, in yards where winches cannot be used to transport materials. This results in low safety, high labor intensity, and low efficiency. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a coal mine roadway track transport device, which has the advantages of convenient transport and high efficiency.

[0005] The coal mine roadway track transport device of this invention includes: a base assembly and a carrier assembly.

[0006] The base assembly includes a base body and a drive wheel. The drive wheel is connected to the base body and is used to engage with a track so that the base body can move along the track. The vehicle assembly includes a vehicle body, which is rotatably connected to the base body about a first axis. The top of the vehicle body has a limiting groove, and the first axis is parallel to the height direction of the base assembly. The base assembly and the carrier assembly constitute a transport unit, which is set on two parallel tracks respectively, and the two limiting slots are used to jointly support the object to be transported.

[0007] The coal mine roadway track transport device of this invention has two transport units respectively set on two parallel tracks to jointly carry the object to be transported. Even if there is a gap error or local unevenness between the two tracks, the two carrier bodies can automatically coordinate the posture of the material through relative rotation, avoiding the material from twisting or jamming due to excessive constraint rigidity at both ends. This ensures the smoothness and reliability of the entire transport process in complex roadway environments, realizes mechanized movement, replaces manual transport, and reduces labor intensity.

[0008] In some embodiments, the drive wheel includes a first wheel and a second wheel, the track is an I-beam track, the first wheel engages with the top surface of the track, and there are two second wheels, each engaging with a side groove of the track.

[0009] In some embodiments, the base assembly further includes a connecting seat that connects the base body and the second wheel, and the connecting seat is detachably connected to at least one of the base body and the second wheel.

[0010] In some embodiments, the length of the first wheel is approximately equal to the width of the track.

[0011] In some embodiments, the thickness of the second wheel is less than the width of the side groove of the track.

[0012] In some embodiments, the vehicle body includes a connected base plate and side plates, the base plate being rotatably connected to the base body, the side plates being located on both sides of the base plate along the width direction of the base body, and the base plate and side plates defining a limiting groove.

[0013] In some embodiments, the carrier assembly further includes a pivot and a bearing, the base body has a positioning hole, the outer ring of the bearing is fitted into the positioning hole, the pivot is fixedly connected to the base plate, and the base plate can rotate relative to the base body via the bearing about the pivot.

[0014] In some embodiments, the height of the vehicle body is less than or equal to half the height of the base assembly.

[0015] In some embodiments, the vehicle assembly further includes a connecting rod, one end of which passes through the side plate and is connected to the base plate, the side plate being movable relative to the base plate along the extension direction of the connecting rod.

[0016] In some embodiments, the vehicle assembly further includes an elastic element fitted to the connecting rod and located between the side plate and the bottom plate, the connecting rod moving in a direction away from the bottom plate, and the side plate moving in a direction away from the bottom plate under the elastic force of the elastic element. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation of a coal mine roadway track transport device according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the use of the coal mine roadway track transport device according to an embodiment of the present invention.

[0019] Figure label: 100. Track; 200. Object; 300. Transport unit. 1. Base assembly; 11. Base body; 12. First wheel; 13. Second wheel; 14. Connecting bracket. 21. Vehicle body; 211. Floor plate; 212. Side plate; 213. Limiting groove. 22. Shaft, 23. Bearings 24. Connecting rod, 25. Elastic components. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figure 1 and Figure 2 As shown, the coal mine roadway track transport device of this embodiment includes: a base assembly 1 and a carrier assembly.

[0022] The base assembly 1 includes a base body 11 and a drive wheel. The drive wheel is connected to the base body 11 and is used to engage with a track 100 so that the base body 11 can move along the track 100. The carrier assembly includes a carrier body 21, which is rotatably connected to the base body 11 about a first axis. The top of the carrier body 21 has a limiting groove 213. The first axis is parallel to the height direction of the base assembly 1 (e.g., ...). Figure 1 (Up and down direction in the middle), the base assembly 1 and the carrier assembly constitute a transport unit 300. The transport unit 300 is used to be set on two parallel tracks 100 respectively, and the two limiting grooves 213 are used to jointly support the object 200 to be transported.

[0023] like Figure 1 and Figure 2 As shown, the drive wheel is mounted on the lower part of the base body 11 via a connecting structure such as an axle or bracket. The structural dimensions of the drive wheel match the specifications of the track 100 in the coal mine roadway, allowing the drive wheel to engage with the track 100. Due to the stable rolling friction between the drive wheel and the track 100, the base assembly 1 can carry materials and be pushed or pulled along the track 100, eliminating the need for manual carrying. This reduces the labor intensity of operators and provides a stable foundation for the subsequent carrier assembly to carry materials.

[0024] The carrier body 21 can rotate relative to the base body 11 around a vertical axis, which is equivalent to having a rotational degree of freedom in the horizontal plane. In coal mine roadways, the track 100 often has height differences and flatness errors. If the carrier and base are rigidly fixed, the material will experience torsional stress when encountering undulations in the track 100, leading to jamming or overturning. The rotating connection allows the carrier body 21 to automatically adjust its posture within a certain range, resulting in more even material stress and smoother operation. When the transport unit 300 travels through roadway branches or bends, the carrier rotates with the direction of the track 100, preventing interference between the material and the track 100 or the roadway wall, thus improving the device's maneuverability in narrow roadways.

[0025] The shape of the limiting groove 213 can be adapted to the cross-sectional shape of the material to be transported. For example, for materials with a rectangular cross-section such as cement sleepers, the limiting groove 213 can be an upward-opening U-shaped groove or a rectangular groove. After the material is placed in, its two side walls are restricted by the groove walls and its bottom is supported by the groove bottom.

[0026] Long, strip-shaped materials, lacking lateral restraint during transportation, are prone to rolling off due to vibration or bumps, posing a safety hazard of injuring personnel. The limiting groove 213 provides a stable holding space, ensuring the material remains in a fixed position during handling. Workers simply place the material into the limiting groove 213 to complete initial positioning, eliminating the need for additional binding or alignment with multiple positioning points, simplifying operation and reducing work time.

[0027] Therefore, in the coal mine roadway track transport device of this embodiment, two transport units 300 are respectively set on two parallel tracks 100 to jointly carry the object 200 to be transported. Even if there is a gap error or local unevenness between the two tracks 100, the two carrier bodies 21 can automatically coordinate the posture of the material through relative rotation, avoiding the material from twisting or getting stuck due to excessive constraint rigidity at both ends. This ensures the smoothness and reliability of the entire transport process in complex roadway environments, realizes mechanized walking, replaces manual transport, and reduces labor intensity.

[0028] In some embodiments, the drive wheel includes a first wheel 12 and a second wheel 13, the track 100 is an I-beam track 100, the first wheel 12 engages with the top surface of the track 100, and there are two second wheels 13, which engage with the side grooves of the track 100 respectively.

[0029] like Figure 1 and Figure 2As shown, the first wheel 12 is installed on the lower part of the base body 11, and its rolling surface contacts the top surface of the upper flange of the I-beam rail 100. The axis of the first wheel 12 is perpendicular to the extension direction of the rail 100, enabling the first wheel 12 to roll stably along the top surface of the rail 100. The first wheel 12 mainly bears the vertical load in the entire drive structure, that is, the weight of the base assembly 1 and the material it carries is transferred to the top surface of the rail 100 through the first wheel 12, thereby ensuring that the conveying unit 300 can move smoothly on the rail 100.

[0030] There are two second wheels 13, each engaging with the side grooves of the track 100. The cross-section of the I-beam track 100 is I-shaped, with inwardly recessed groove-shaped areas formed on both sides between its upper flange and web, i.e., the side grooves of the track 100. The two second wheels 13 are respectively installed on the left and right sides of the base body 11 and are embedded into the grooves on both sides of the I-beam track 100, engaging with the side wall surfaces of the grooves.

[0031] The axes of the two second wheels 13 are generally perpendicular to the extension direction of the track 100 and point horizontally towards the inside of the track 100, so that the second wheels 13 can rotate along the surface of the groove when moving. Since the two second wheels 13 are located in the grooves on both sides of the track 100, they simultaneously constrain the base assembly 1 from both left and right directions, limiting the lateral displacement of the base assembly 1 relative to the track 100.

[0032] In some embodiments, the base assembly 1 further includes a connecting seat 14, which connects the base body 11 and the second wheel 13, and the connecting seat 14 is detachably connected to at least one of the base body 11 and the second wheel 13.

[0033] like Figure 1 and Figure 2 As shown, one end of the connecting seat 14 is connected to the base body 11, and the other end is connected to the second wheel 13, thereby indirectly mounting the second wheel 13 onto the base body 11, allowing the second wheel 13 to be stably embedded in the side groove of the I-beam rail 100. The connection between the connecting seat 14 and the base body 11 is detachable, or the connection between the connecting seat 14 and the second wheel 13 is detachable, or both are detachable. That is, at least one of the two connection relationships—between the connecting seat 14 and the base body 11, and between the connecting seat 14 and the second wheel 13—is detachable.

[0034] Alternatively, the detachable connection can be achieved using a variety of conventional structures, such as bolt connection, screw connection, pin connection or snap-fit ​​connection. These connection methods can ensure connection strength while allowing the connector 14, the second wheel 13 or the base body 11 to be easily separated from each other when needed.

[0035] In some embodiments, the length of the first wheel 12 is approximately equal to the width of the track 100.

[0036] like Figure 1 and Figure 2 As shown, the length of the first wheel 12 refers to its axial dimension, which is the width of the rolling surface of the first wheel 12 in contact with the top surface of the track 100. The width of the track 100 corresponds to the transverse width of the upper flange of the I-beam track 100. In other words, the rolling surface of the first wheel 12 almost completely covers the entire width of the top surface of the I-beam track 100 in the transverse direction.

[0037] Since the length of the first wheel 12 is approximately equal to the width of the track 100, the contact area between the first wheel 12 and the top surface of the track 100 is increased. Because the length of the first wheel 12 is approximately equal to the width of the track 100, the weight of the conveying unit 300 and the materials it carries can be transferred to the top surface of the track 100 through a larger wheel surface area, significantly reducing contact stress. Under long-term, heavy-load operation, the top surface of the track 100 is less prone to indentation or plastic deformation due to excessive local pressure, and the wear rate of the first wheel 12 itself will also decrease accordingly, thereby extending the service life of the track 100 and the drive wheel.

[0038] In some embodiments, the thickness of the second wheel 13 is less than the width of the side groove of the track 100.

[0039] It is understandable that the thickness of the second wheel 13 refers to its axial dimension, while the width of the groove refers to the net width of the groove-shaped space formed between the upper flange and the web of the I-beam rail 100 in the transverse direction. In other words, after the second wheel 13 is embedded in the groove on the side of the rail 100, a certain gap is maintained between the side of the wheel and the two side walls of the groove.

[0040] In other words, the I-beam rail 100 in the mine roadway inevitably experiences localized deformation during use, such as flange bending, web misalignment, or weld bulging. Simultaneously, coal dust and slag easily accumulate in the grooves of the rail 100. If the thickness of the second wheel 13 is equal to or slightly larger than the width of the groove, the wheel will become stuck in the groove if the rail 100 contracts locally or debris enters, preventing the transport unit 300 from moving normally and potentially damaging the drive wheel or the rail 100. However, if the thickness of the second wheel 13 is less than the width of the groove, the wheel has sufficient space within the groove. Even if the rail 100 has manufacturing tolerances or minor deformations during use, the wheel can pass smoothly, ensuring the continuity and reliability of movement.

[0041] In some embodiments, the vehicle body 21 includes a connected base plate 211 and a side plate 212. The base plate 211 is rotatably connected to the base body 11, and the side plate 212 is along the width direction of the base body 11 (e.g., ...). Figure 1 The left and right directions are located on both sides of the base plate 211, and the base plate 211 and the side plate 212 define the limiting groove 213.

[0042] like Figure 1 and Figure 2 As shown, the side plates 212 are located on both sides of the base plate 211, that is, on both sides along the width direction of the base body 11. The two side plates 212 are arranged opposite each other and extend upward. The connection between the side plates 212 and the base plate 211 can be achieved by welding, integral bending, riveting, or bolting. The inner surfaces of the two side plates 212 and the top surface of the base plate 211 together form an upward-opening groove structure, namely the limiting groove 213. In other words, the base plate 211 forms the bottom of the limiting groove 213, and the two side plates 212 form the opposite side walls of the limiting groove 213. The two ends of the limiting groove 213 along the length direction of the base (that is, the extension direction of the track 100) remain open to facilitate the insertion and removal of materials.

[0043] In some embodiments, the vehicle assembly further includes a pivot 22 and a bearing 23. The base body 11 has a positioning hole, and the outer ring of the bearing 23 is fitted into the positioning hole. The pivot 22 is fixedly connected to the base plate 211, and the base plate 211 can rotate relative to the base body 11 around the pivot 22 via the bearing 23.

[0044] like Figure 1 and Figure 2 As shown, a positioning hole is provided on the base body 11, with the axis of the positioning hole extending vertically and its position corresponding to the setting position of the rotating shaft 22 on the base plate 211. The bearing 23 is installed in the positioning hole, and the outer ring of the bearing 23 is fitted with the inner wall of the positioning hole by interference fit or transition fit, so that the bearing 23 and the base body 11 form a fixed connection. The inner ring of the bearing 23 remains in a free state and is used to pass through the rotating shaft 22.

[0045] The rotating shaft 22 is vertically oriented, and its lower end or corresponding part is fixedly connected to the base plate 211. The connection method can be welding, key connection, bolt fastening, or integral molding, so that there is no relative movement between the rotating shaft 22 and the base plate 211. The upper part of the rotating shaft 22 passes through the inner ring of the bearing 23 and forms a fit with the inner ring of the bearing 23. Since the inner and outer rings of the bearing 23 can rotate relative to each other through rolling elements, when the rotating shaft 22 is subjected to force by the base plate 211, the rotating shaft 22 can rotate relative to the outer ring of the bearing 23 around its own axis. Since the outer ring of the bearing 23 is fixed in the positioning hole of the base body 11, the base plate 211 can rotate relative to the base body 11 around the rotating shaft 22.

[0046] In some embodiments, the height of the vehicle body 21 is less than or equal to half the height of the base assembly 1.

[0047] like Figure 1 and Figure 2 As shown, the height of the carrier body 21 refers to the vertical dimension of the carrier body 21 from bottom to top. Lowering the center of gravity of the entire handling device improves its anti-tipping stability. In other words, when material is placed in the limiting groove 213, its center of gravity position depends on the height of the carrier body 21. When the height of the carrier body 21 is limited to less than half the height of the base assembly 1, the material bearing surface is lowered, and the center of gravity of the entire machine is lowered accordingly.

[0048] For applications where two handling units 300 work together on parallel tracks 100 to handle long materials, a low center of gravity means that the device is more resistant to tipping over when traveling on curves, when the tracks 100 are uneven, when starting or braking, or when subjected to lateral impacts. Especially when the materials are long and heavy, a low center of gravity can effectively prevent tipping accidents caused by inertia, thus structurally ensuring the safety of handling operations.

[0049] In some embodiments, the vehicle assembly further includes a connecting rod 24, one end of which passes through a side plate 212 and is connected to a base plate 211, the side plate 212 being movable relative to the base plate 211 along the extending direction of the connecting rod 24.

[0050] like Figure 1 and Figure 2 As shown, one end of the connecting rod 24 is connected to the base plate 211. The connection method can be welding, threaded connection, riveting, or integral molding, forming a fixed connection between the connecting rod 24 and the base plate 211. The other end of the connecting rod 24 passes through a through hole in the side plate 212. The through hole in the side plate 212 and the connecting rod 24 have a clearance fit or a sliding fit, allowing the side plate 212 to slide freely on the connecting rod 24.

[0051] Optionally, multiple connecting rods 24 can be provided. For example, two connecting rods 24 can be arranged at intervals along the length of the base plate 211, and multiple through holes can be opened on the side plate 212 accordingly. The multiple connecting rods 24 together constrain the side plate 212, so that the side plate 212 always remains parallel to its original installation posture during sliding, and will not flip or deflect. At the same time, it also improves the connection rigidity between the side plate 212 and the base plate 211.

[0052] In other words, coal mine roadways require the handling of various materials, including cement sleepers, wooden sleepers, and rail components, which vary significantly in cross-sectional width. In a structure where the side plate 212 is fixed, the width of the limiting groove 213 is fixed, limiting its application to only a single material specification. However, the two side plates 212 can move closer together or further apart along the connecting rod 24, thus changing the lateral width of the limiting groove 213. This allows the same handling device to accommodate materials of various widths without requiring replacement of the carrier due to changes in material specifications, significantly improving the device's versatility and ease of use.

[0053] In some embodiments, the vehicle assembly further includes an elastic element 25, which is fitted onto a connecting rod 24 and located between a side plate 212 and a bottom plate 211. The connecting rod 24 moves in a direction away from the bottom plate 211, and the side plate 212 moves in a direction away from the bottom plate 211 under the elastic force of the elastic element 25.

[0054] like Figure 1 and Figure 2 As shown, the elastic element 25 is fitted around the outer periphery of the connecting rod 24 and is disposed between the side plate 212 and the base plate 211. One end of the elastic element 25 abuts against the side of the base plate 211 facing the side plate 212, and the other end abuts against the inner side of the side plate 212 facing the base plate 211. Optionally, the elastic element 25 can be a compression spring, disc spring, or elastic sleeve, etc., which has axial elastic force; that is, the elastic element 25 only needs to be able to generate an elastic force along the axial direction of the connecting rod 24 between the side plate 212 and the base plate 211.

[0055] In the assembled state, the elastic element 25 is located within the clamping space formed between the base plate 211 and the side plate 212, with its axial direction aligned with the extension direction of the connecting rod 24. Because the elastic element 25 has the ability to expand and contract axially, when the side plate 212 changes position relative to the base plate 211 along the connecting rod 24, the elastic element 25 will be further compressed or released and extended. Specifically, when the side plate 212 moves towards the base plate 211 under external force, the elastic element 25 is compressed, increasing its elastic force; when the external force disappears, the elastic element 25 releases its elastic force, pushing the side plate 212 along the connecting rod 24 away from the base plate 211 until it returns to its predetermined initial position or abuts against the anti-disengagement ring at the end of the connecting rod 24.

[0056] Therefore, after material is unloaded or the side plate 212 is pushed by an external force, the elastic element 25 can automatically push the side plate 212 along the connecting rod 24 in a direction away from the bottom plate 211, so that the limiting groove 213 returns to its open initial state, without the need for manual adjustment of the side plate 212 position. When the material causes lateral impact to the side plate 212 due to the bumps or inertial swaying of the track 100 during the handling process, the side plate 212 will transfer the impact force to the elastic element 25. The impact energy is absorbed by the compression deformation of the elastic element 25, thereby avoiding rigid collision between the side plate 212 and the material. This elastic buffer not only protects the material surface from bump damage, but also reduces the impact load between the side plate 212, the connecting rod 24 and the bottom plate 211, which helps to extend the service life of the carrier components.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coal mine roadway track transport device, characterized in that, include: A base assembly includes a base body and a drive wheel connected to the base body. The drive wheel engages with a track so that the base body can move along the track. A vehicle assembly includes a vehicle body rotatably connected to a base body about a first axis. The top of the vehicle body has a limiting groove. The first axis is parallel to the height direction of the base assembly. The base assembly and the carrier assembly constitute a transport unit, which is set on two parallel tracks respectively, and the two limiting slots are used to jointly support the object to be transported.

2. The coal mine roadway track conveying device according to claim 1, characterized in that, The drive wheel includes a first wheel and a second wheel. The track is an I-beam track. The first wheel mates with the top surface of the track. There are two second wheels, and each of the two second wheels mates with the side groove of the track.

3. The coal mine roadway track conveying device according to claim 2, characterized in that, The base assembly further includes a connecting seat that connects the base body and the second wheel, and the connecting seat is detachably connected to at least one of the base body and the second wheel.

4. The coal mine roadway track conveying device according to claim 2, characterized in that, The length of the first wheel is approximately equal to the width of the track.

5. The coal mine roadway track conveying device according to claim 2, characterized in that, The thickness of the second wheel is less than the width of the side groove of the track.

6. The coal mine roadway track conveying device according to claim 1, characterized in that, The vehicle body includes a connected base plate and side plates. The base plate is rotatably connected to the base body. The side plates are located on both sides of the base plate along the width direction of the base body. The base plate and side plates define a limiting groove.

7. The coal mine roadway track conveying device according to claim 6, characterized in that, The vehicle assembly also includes a rotating shaft and a bearing. The base body has a positioning hole, and the outer ring of the bearing is fitted into the positioning hole. The rotating shaft is fixedly connected to the base plate, and the base plate can rotate relative to the base body via the bearing around the rotating shaft.

8. The coal mine roadway track conveying device according to claim 6, characterized in that, The height of the vehicle body is less than or equal to half the height of the base assembly.

9. The coal mine roadway track conveying device according to claim 6, characterized in that, The vehicle assembly also includes a connecting rod, one end of which passes through the side plate and is connected to the base plate, and the side plate is movable relative to the base plate along the extension direction of the connecting rod.

10. The coal mine roadway track transport device according to claim 9, characterized in that, The vehicle assembly also includes an elastic element fitted onto the connecting rod and located between the side plate and the bottom plate. The connecting rod moves in a direction away from the bottom plate, and the side plate moves in a direction away from the bottom plate under the elastic force of the elastic element.

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