A flatbed truck for coal mines

Abstract

The present invention discloses a flatbed truck for coal mines, which relates to the technical field of coal mine transportation machinery, and solves the problem that the flatbed truck has a fixed force area for coal mine transportation goods, but the force area adjustment effect on the bottom of the flatbed truck is not high, which easily causes the flatbed truck to tilt and tilt forward. The limb exercise device includes a flatbed truck body, a connecting steel plate and connecting wheels; in the present invention, when the coal mine is transported by the flatbed truck for coal mines, in order to improve the adjustment of the center of gravity of the flatbed truck during the driving process when the flatbed truck transports coal of different weights, and the synchronization effect of the limit position during the transportation of goods, so as to improve the adjustment effect of the flatbed truck on the force area of ​​the coal mine, the connecting steel plate can be driven to perform horizontal centering movement along the inner wall of the adjustment groove according to the needs of the force area, so as to achieve convenient adjustment of the spacing between the two groups of connecting steel plates, thereby improving the stability of the flatbed truck in transporting goods of different weights.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine transportation machinery, in particular to a flatbed truck for coal mines. Background Art

[0002] Flatbed trucks are special narrow-gauge vehicles mainly used to transport heavy equipment such as hydraulic supports, coal mining machines or dismantled large equipment above and below the coal mine. Flatbed trucks are towed by locomotives or winches, and are connected by single-loop or triple-loop chains to enable them to run smoothly on the guide rails.

[0003] At the same time, flatbed trucks are often used in coal mine production, especially in coal mine track production. However, due to the need for the turning radius of coal mine tracks, it is necessary to improve the stability of the flatbed truck during transportation to prevent the flatbed truck from tipping over due to unstable center of gravity or fixed force area, thus affecting the transportation efficiency of coal mine items.

[0004] The existing Chinese patent application with publication number CN203651799U discloses an anti-slip device for a flatbed truck for coal mines. The vehicle body constitutes the overall structure of the utility model. The vehicle body is welded by I-beams, channel steels and steel plates. Wheels are installed at the bottom of the vehicle body. The upper traction plate is installed on the upper surface at both ends of the vehicle body, and the lower traction plate is installed on the lower surface at both ends of the vehicle body. The latch is installed at both ends of the vehicle body. An anti-slip bolt is provided at the bottom of the latch, and an anti-slip bolt passage is provided in the middle of the anti-slip ring. The anti-slip ring is installed at the bottom of the latch. The traction three-ring chain has two connecting ends, one end is connected to the rear of the vehicle body, and the other end is connected to the head of the next flatbed truck. The utility model is safe and reliable in operation and easy to maintain. The wheel seal is a labyrinth seal, which can effectively prevent the invasion of coal powder and sand.

[0005] The existing Chinese patent application with publication number CN217200391U discloses a novel flatbed truck for coal mines, including a chassis, which is a square frame welded from square steel pipes, and two pairs of wheel frames are symmetrically arranged at the front and rear of the bottom center of the chassis, each pair of wheel frames is provided with steel rail wheels, two pairs of sliding seats are arranged on the front and rear sides of the chassis, and the two sliding seats on the same side are arranged in a mirror-symmetrical manner, the lower end of the sliding seat is connected to a support arm for sliding left and right, and a balancing wheel is arranged on the outer side of the lower end of the support arm, the bottom of the balancing wheel is flush with the bottom of the steel rail wheel, through the four balancing wheels, the balancing wheels are arranged close to the rails at the front and rear positions of the flatbed truck, and are adaptively moved with the cooperation of the sliding seat and the support arm to ensure that the balancing wheels can fit the rails as the front and rear spacing changes when turning, maintain front and rear support for the bottom of the flatbed truck, avoid the front and rear ends of the flatbed truck from tilting or touching the bottom when moving, maintain stable movement of the flatbed truck, and reduce the occurrence of rollover accidents.

[0006] However, the processing platform has the following defects when used:

[0007] 1. In the daily transportation use of the existing flatbed truck for coal mines, the installation position of the running wheels is relatively fixed, and the spacing between the running wheels is relatively fixed. The spacing between the running wheels is not adjustable. When the flatbed truck for coal mines transports objects of different weights, the force bearing area of ​​the flatbed truck for coal mines is fixed, which easily causes the flatbed truck for coal mines to tilt forward and backward, and then causes the flatbed truck for coal mines to tip over. At the same time, when the spacing of the running wheels is adjusted, the synchronous limiting effect of the objects above the flatbed truck is not high, and the inertia generated when the flatbed truck is driving easily causes the objects to shake and fall, thereby affecting the transportation efficiency of the flatbed truck for coal mines;

[0008] 2. In the daily transportation use of the existing flatbed trucks for coal mines, the installation of the traveling wheels is mostly limited by bolts and nuts. The convenience of the traveling wheels being installed by snapping on the bottom of the flatbed truck is not high, so that when the traveling wheels need to be disassembled and replaced, the bolts and nuts are easily adsorbed by the dust generated in the coal mine, which makes it more complicated for maintenance personnel to disassemble the traveling wheels when loosening and disassembling the bolts and nuts, thereby reducing the efficiency of disassembly and maintenance of the traveling wheels at the bottom of the flatbed truck, thereby reducing the efficiency of transporting coal mine items. Summary of the invention

[0009] The object of the present invention is to provide a flatbed truck for coal mines to solve the problems raised in the above-mentioned background technology.

[0010] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0011] The present invention provides a flatbed truck for coal mines, comprising a flatbed truck body, a connecting steel plate and connecting wheels, wherein the bottom of the flatbed truck body is slidably connected to the connecting steel plate, the outer wall of the connecting steel plate is detachably connected to the connecting wheels, and a leveling mechanism is provided at the bottom of the flatbed truck body;

[0012] The leveling mechanism comprises:

[0013] A sliding rod is slidably connected to the bottom of the flatbed vehicle body and is driven by a rotating assembly. An adjustment groove is provided at the connection between the bottom of the flatbed vehicle body and the connecting steel plate;

[0014] A lifting rod, wherein the bottom of the flatbed vehicle body is slidably connected to a connecting rod and driven by a lifting assembly, wherein the lifting rod is slidably connected to the side wall of the flatbed vehicle body, and a connecting groove is provided at the connecting portion between the side wall of the flatbed vehicle body and the lifting rod;

[0015] Wherein, the rotating assembly and the lifting assembly are arranged on the same horizontal plane, and the sliding directions between the connecting rod and the sliding rod are opposite;

[0016] The rotating assembly includes:

[0017] A bevel gear set, wherein a servo motor is fixedly connected to the bottom of the flatbed vehicle body, an output end of the servo motor is fixedly connected to a bevel gear set rotatably connected to the bottom of the flatbed vehicle body, and an outer wall of the bevel gear set is fixedly connected to a rotating shaft;

[0018] A first threaded rod, the end of the rotating shaft is fixedly connected to the first threaded rod threadedly connected to the outer wall of the sliding rod, a fixing groove is provided at the connection position between the bottom of the flatbed vehicle body and the sliding rod, and the outer wall of the sliding rod is rotatably connected to a rotating rod rotatably connected to the outer wall of the connecting steel plate;

[0019] A second threaded rod, the bottom of the flatbed vehicle body is rotatably connected to a second threaded rod threadedly connected to the outer wall of the connecting rod;

[0020] As a preferred solution of the present invention, the connecting rods and sliding rods are provided in two groups, and the positions of the two groups of connecting rods and sliding rods are symmetrical about the central axis of the flatbed vehicle body;

[0021] Among them, the connecting steel plate and the sliding rod are arranged in a one-to-one correspondence, the thickness of the connecting steel plate is 25 mm, the diameter of the connecting wheel is 230 mm, and the wheelbase of the connecting wheel is 1200 mm.

[0022] As a preferred solution of the present invention, two groups of first threaded rods are provided, and the rotation directions of the two groups of first threaded rods are opposite; two groups of rotating rods are provided, and the rotation directions of the two groups of rotating rods are opposite;

[0023] Wherein, the rotation center of the first threaded rod, the rotation center of the rotating shaft and the rotation center of the second threaded rod are all on the same horizontal plane.

[0024] As a preferred embodiment of the present invention, the lifting assembly includes:

[0025] A pulling rod, the outer wall of the connecting rod is rotatably connected to a pulling rod rotatably connected to the outer wall of the lifting rod, and the top of the lifting rod is fixedly connected to a limiting plate slidably connected to the side wall of the flatbed vehicle body.

[0026] As a preferred solution of the present invention, the outer wall profile of the limit plate is in a "U" shape, and the limit plates are symmetrically arranged on both sides of the flatbed vehicle body;

[0027] Wherein, the lifting rods and the limiting plates are arranged in a one-to-one correspondence.

[0028] As a preferred embodiment of the present invention, the engaging mechanism includes:

[0029] A plug rod, the outer wall of the connecting steel plate is slidably connected with the plug rod, and a slot is provided at the connection position between the outer wall of the connecting steel plate and the plug rod;

[0030] A connection box, one end of the plug rod is fixedly connected to a connection rod, the outer wall of the connection rod is slidably connected to a connection box fixedly connected to the outer wall of the connection steel plate, and the inner wall of the connection box is telescopically connected to a telescopic rod engaged with the outer wall of the connection rod;

[0031] A pull block, wherein the outer wall of the telescopic rod is fixedly connected to a telescopic rod slidably connected to the outer wall of the connection box, the outer wall of the telescopic rod is sleeved with a spring fixedly connected to the outer wall of the connection box, and one end of the spring is fixedly connected to a pull block fixedly connected to one end of the telescopic rod.

[0032] As a preferred solution of the present invention, the connection box is arranged on the movement track of the plug rod, the outer wall contour of the connection card rod is smaller than the inner wall contour of the slot, and the outer wall contour of the connection part of the connection card rod and the telescopic card rod is an inclined surface;

[0033] Wherein, a buffer extrusion block is arranged at a connection position between the outer wall of the connecting steel plate and the connecting wheel, and a connection groove is arranged at a connection position between the outer wall of the connecting box and the connecting clamp rod.

[0034] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0035] 1. When the flatbed truck for coal mines is used to transport coal mines, in order to improve the flatbed truck's adjustment of the center of gravity during the transportation of coal mines of different weights, and the synchronization effect of the limit position during cargo transportation, the flatbed truck can be used to improve the adjustment effect of the flatbed truck on the force-bearing area of ​​the coal mine. According to the needs of the force-bearing area, the servo motor can be turned on to drive the rotating shaft to rotate through the rotation of the bevel gear set. The rotation of the rotating shaft drives the sliding rod to slide along the inner wall of the fixed groove through the rotation of the first threaded rod. The sliding of the sliding rod drives the connecting steel plate to perform horizontal centering movement along the inner wall of the adjusting groove through the rotation of the rotating rod, so as to conveniently adjust the spacing between the two sets of connecting steel plates, thereby improving the stability of the flatbed truck in transporting cargo of different weights.

[0036] 2. When the flatbed truck for coal mines is used to assist in the transportation of coal mines, in order to improve the synchronous limiting effect when placing goods on the flatbed truck, while driving the first threaded rod to rotate, the second threaded rod will be driven to rotate in the opposite direction. The rotation of the second threaded rod drives the connecting rod to slide synchronously along the inner wall of the fixed groove. The sliding of the connecting rod will drive the lifting rod to perform lifting and lowering movements along the side wall of the flatbed truck body through the rotation of the pulling rod. At the same time, the lifting and lowering movement of the lifting rod will drive the limiting plate to perform synchronous lifting and lowering movements, which plays a role in effectively limiting the two sides of the flatbed truck for mines, preventing the flatbed truck from bumping and vibrating during transportation, causing the goods to fall under inertia, thereby achieving the effect of improving the stability of placing the goods on the flatbed truck;

[0037] 3. When the flatbed truck for coal mines is used to assist in the transportation of coal mines, in order to improve the convenience of disassembly, assembly and maintenance of the connecting wheels under long-term use, when the connecting wheels need to be installed, the insertion rod is inserted into the inner wall of the slot through the connection of the slot, and the connecting clamp rod is driven to be inserted into the connecting box. When the extrusion part of the connecting clamp rod and the telescopic clamp rod is an inclined surface, the telescopic rod and the spring are extruded until the connection part of the connecting clamp rod and the telescopic clamp rod is a plane, which plays a role in conveniently clamping and fixing the insertion rod, so that the connecting wheel can be conveniently clamped and installed on the surface of the connecting steel plate, which plays a role in reducing the cumbersomeness of installing the connecting wheel by bolts;

[0038] 4. When a flatbed truck for coal mines is used to assist in coal mine transportation, in order to improve the flatbed truck's ability to meet the height requirements of the tunnel site during transportation, the original MPC30-6 flatbed truck for coal mines with a wheel pair of φ300mm is modified into φ230mm, and the bearing is changed from 7315 to 32317. The crossbeams of the original front and rear fixed wheel pair bearing seats of the flatbed truck are replaced with steel plates of a combined structure, and the size of the bearing seats is remodeled, so that the overall dimensions of the modified flatbed truck are length * width * total height = 3200mm * 1400mm * 290mm, so that the height of the flatbed truck meets the safe transportation conditions of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0040] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the structure of the present invention as a whole when viewed from above;

[0043] Figure 3 It is a structural schematic diagram of the connection between the lifting rod and the limiting plate of the present invention;

[0044] Figure 4 It is a schematic structural diagram of the connection between the rotating rod and the connecting steel plate of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the position distribution of the first threaded rod and the second threaded rod of the present invention;

[0046] Figure 6 It is a structural schematic diagram of the connection between the insertion rod and the connecting steel plate of the present invention;

[0047] Figure 7 It is a schematic diagram of the structure of the present invention showing the distribution of the positions of the plug rods and the slots;

[0048] Figure 8 It is a structural schematic diagram of the connection between the connecting rod and the telescopic rod of the present invention;

[0049] In the figure:

[0050] 1. Flatbed body;

[0051] 2. Connect steel plates;

[0052] 3. Connect the wheels;

[0053] 4. Adjustment slot;

[0054] 5. Leveling mechanism;

[0055] 6. Sliding rod;

[0056] 7. Lifting rod;

[0057] 8. Rotating assembly; 801. servo motor; 802. bevel gear set; 803. rotating shaft; 804. first threaded rod; 805. fixing groove; 806. rotating rod; 807. second threaded rod;

[0058] 9. Lifting assembly; 901. Connecting rod; 902. Pulling rod; 903. Limiting plate;

[0059] 10. Clamping mechanism; 1001. Insertion rod; 1002. Connecting rod; 1003. Connecting box; 1004. Slot; 1005. Telescopic rod; 1006. Telescopic rod; 1007. Spring; 1008. Pull block. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0061] See also Figure 1-Figure 8 A flatbed truck for coal mines comprises a flatbed truck body 1, a connecting steel plate 2 and a connecting wheel 3. The bottom of the flatbed truck body 1 is slidably connected to the connecting steel plate 2, and the outer wall of the connecting steel plate 2 is detachably connected to the connecting wheel 3. A leveling mechanism 5 is provided at the bottom of the flatbed truck body 1; the leveling mechanism 5 comprises: a sliding rod 6, the bottom of the flatbed truck body 1 is slidably connected to the sliding rod 6, and is driven by a rotating assembly 8, and an adjusting groove 4 is provided at the connection position between the bottom of the flatbed truck body 1 and the connecting steel plate 2; a lifting rod 7, the bottom of the flatbed truck body 1 is slidably connected to a connecting rod 901, and is driven by a lifting assembly 9, the lifting rod 7 is slidably connected to the side wall of the flatbed truck body 1, and a connecting groove is provided at the connection position between the side wall of the flatbed truck body 1 and the lifting rod 7; wherein the rotating assembly 8 and the lifting assembly 9 are arranged on the same horizontal plane, and the connecting rod The sliding directions between 901 and the sliding rod 6 are opposite; the rotating component 8 includes: a bevel gear set 802, a servo motor 801 is fixedly connected to the bottom of the flatbed body 1, the output end of the servo motor 801 is fixedly connected to the bevel gear set 802 rotatably connected to the bottom of the flatbed body 1, and the outer wall of the bevel gear set 802 is fixedly connected to the rotating shaft 803; a first threaded rod 804, the end of the rotating shaft 803 is fixedly connected to the first threaded rod 804 threadedly connected to the outer wall of the sliding rod 6, a fixing groove 805 is provided at the connecting portion between the bottom of the flatbed body 1 and the sliding rod 6, and the outer wall of the sliding rod 6 is rotatably connected to a rotating rod 806 rotatably connected to the outer wall of the connecting steel plate 2; a second threaded rod 807, the bottom of the flatbed body 1 is rotatably connected to the second threaded rod 807 threadedly connected to the outer wall of the connecting rod 901.

[0062] The above working principle: when coal is transported by a coal mine flatbed truck, in order to improve the flatbed truck's ability to adjust the center of gravity during the transportation of coal of different weights, and the synchronization effect of the limit during cargo transportation, so as to improve the flatbed truck's adjustment effect on the force-bearing area of ​​the coal mine, the servo motor 801 can be turned on according to the needs of the force-bearing area, and the rotation of the bevel gear set 802 drives the rotating shaft 803 to rotate. The rotation of the rotating shaft 803 drives the sliding rod 6 to slide along the inner wall of the fixed groove 805 through the rotation of the first threaded rod 804. The sliding of the sliding rod 6 drives the connecting steel plate 2 to perform horizontal centering movement along the inner wall of the adjusting groove 4 through the rotation of the rotating rod 806, so as to achieve convenient adjustment of the distance between the two groups of connecting steel plates 2, thereby improving the stability of the flatbed truck in transporting cargo of different weights.

[0063] Specific reference Figure 5 There are two groups of connecting rods 901 and sliding rods 6, and the position distribution of the two groups of connecting rods 901 and sliding rods 6 is symmetrical about the central axis of the flatbed vehicle body 1; wherein, the connecting steel plate 2 and the sliding rod 6 are arranged in a one-to-one correspondence, the thickness of the connecting steel plate 2 is 25mm, the diameter of the connecting wheel 3 is 230mm, and the wheelbase of the connecting wheel 3 is 1200mm.

[0064] A flatbed truck for coal mines of the present invention is advantageous in that it facilitates the adjustment of the horizontal spacing of the connecting steel plates 2 and the synchronization of the lifting and lowering protection of the limit plate 903 by setting two sets of connecting rods 901 and sliding rods 6 whose position distribution is symmetrical about the central axis of the flatbed truck body 1.

[0065] In this embodiment, two groups of first threaded rods 804 are provided, and the rotation directions of the two groups of first threaded rods 804 are opposite. Two groups of rotating rods 806 are provided, and the rotation directions of the two groups of rotating rods 806 are opposite. Among them, the rotation center of the first threaded rod 804 and the rotation center of the rotating shaft 803 are all on the same horizontal plane with the rotation center of the second threaded rod 807. The first threaded rod 804 forms a rotating structure with the flatbed body 1 through the bevel gear set 802 and the rotating shaft 803, which is beneficial to the rotation of the bevel gear set 802. Through the connection of the rotating shaft 803, the first threaded rod 804 is driven to rotate along the bottom of the flatbed body 1, thereby driving the sliding rod 6 to conveniently extend and slide.

[0066] At the same time, in this embodiment, the rotation directions of the first threaded rod 804 and the second threaded rod 807 are opposite, which is beneficial to drive the sliding rod 6 and the pulling rod 902 to move effectively through the setting of the first threaded rod 804 and the second threaded rod 807 with opposite rotation directions.

[0067] A flatbed truck for coal mines of the present invention, when used to assist in coal mine transportation, in order to improve the synchronous limiting effect when placing goods on the flatbed truck, while driving the first threaded rod 804 to rotate, it will drive the second threaded rod 807 to rotate in the opposite direction. The rotation of the second threaded rod 807 drives the connecting rod 901 to slide synchronously along the inner wall of the fixed groove 805. The sliding of the connecting rod 901 will drive the lifting rod 7 to perform lifting and lowering movements along the side wall of the flatbed truck body 1 through the rotation of the pulling rod 902. At the same time, the lifting and lowering movement of the lifting rod 7 will drive the limiting plate 903 to perform synchronous lifting and lowering movements, which plays a role in effectively limiting the two sides of the flatbed truck for mining, preventing the flatbed truck from bumping and vibrating during transportation, which may cause the goods to fall due to inertia, thereby achieving the effect of improving the stability of placing the goods on the flatbed truck.

[0068] Specific reference Figure 5 The lifting assembly 9 includes: a pulling rod 902, an outer wall of the connecting rod 901 is rotatably connected to the pulling rod 902 rotatably connected to the outer wall of the lifting rod 7, and the top of the lifting rod 7 is fixedly connected to a limiting plate 903 slidably connected to the side wall of the flatbed vehicle body 1.

[0069] In this embodiment, the outer wall profile of the limit plate 903 is in a "U" shape, and the limit plate 903 is symmetrically arranged on both sides of the flatbed body 1; wherein, the lifting rod 7 and the limit plate 903 are arranged in a one-to-one correspondence, and the limit plate 903 forms a lifting structure with the flatbed body 1 through the pulling rod 902 and the lifting rod 7, which is beneficial to the rotation of the pulling rod 902. Through the connection of the lifting rod 7, the limit plate 903 is driven to perform a lifting movement along the side wall of the flatbed body 1, preventing the flatbed from being bumped and vibrated during transportation, causing the goods to fall due to inertia, thereby achieving the effect of improving the stability of the goods placed on the flatbed.

[0070] A flatbed truck for coal mines of the present invention, when used to assist in coal mine transportation, in order to improve the synchronous limiting effect when placing goods on the flatbed truck, while driving the first threaded rod 804 to rotate, it will drive the second threaded rod 807 to rotate in the opposite direction. The rotation of the second threaded rod 807 drives the connecting rod 901 to slide synchronously along the inner wall of the fixed groove 805. The sliding of the connecting rod 901 will drive the lifting rod 7 to perform lifting and lowering movements along the side wall of the flatbed truck body 1 through the rotation of the pulling rod 902. At the same time, the lifting and lowering movement of the lifting rod 7 will drive the limiting plate 903 to perform synchronous lifting and lowering movements, which plays a role in effectively limiting the two sides of the flatbed truck for mining, preventing the flatbed truck from bumping and vibrating during transportation, which may cause the goods to fall due to inertia, thereby achieving the effect of improving the stability of placing the goods on the flatbed truck.

[0071] Specific reference Figure 8The locking mechanism 10 includes: an insertion rod 1001, the outer wall of the connecting steel plate 2 is slidably connected with the insertion rod 1001, and a slot 1004 is provided at the connection position between the outer wall of the connecting steel plate 2 and the insertion rod 1001; a connecting box 1003, one end of the insertion rod 1001 is fixedly connected with a connecting clamping rod 1002, the outer wall of the connecting clamping rod 1002 is slidably connected with a connecting box 1003 fixedly connected to the outer wall of the connecting steel plate 2, and the inner wall of the connecting box 1003 is telescopically connected with a telescopic clamping rod 1005 that is clamped and connected to the outer wall of the connecting clamping rod 1002; a pulling block 1008, the outer wall of the telescopic clamping rod 1005 is fixedly connected with a telescopic rod 1006 that is slidably connected to the outer wall of the connecting box 1003, the outer wall of the telescopic rod 1006 is sleeved with a spring 1007 that is fixedly connected to the outer wall of the connecting box 1003, and one end of the spring 1007 is fixedly connected with a pulling block 1008 that is fixedly connected to one end of the telescopic rod 1006.

[0072] In this embodiment, the connecting box 1003 is arranged on the movement trajectory of the insertion rod 1001, the outer wall contour of the connecting rod 1002 is smaller than the inner wall contour of the slot 1004, and the outer wall contour of the connecting part of the connecting rod 1002 and the telescopic rod 1005 is an inclined surface; wherein, the outer wall of the connecting steel plate 2 and the connecting wheel 3 are provided with a buffer extrusion block, and the outer wall of the connecting box 1003 and the connecting part of the connecting rod 1002 are provided with a connecting groove, and the insertion rod 1001 forms a clamping structure with the connecting box 1003 through the connecting rod 1002 and the telescopic rod 1005, which is conducive to the clamping connection between the connecting rod 1002 and the telescopic rod 1005, driving the insertion rod 1001 and the connecting box 1003 to be clamped and fixed, so that the connecting wheel 3 can be conveniently clamped and installed on the surface of the connecting steel plate 2, thereby reducing the cumbersomeness of installing the connecting wheel 3 by bolts.

[0073] A flatbed truck for coal mines of the present invention, when used to assist in coal mine transportation, in order to improve the convenience of disassembly, assembly and maintenance of the connecting wheel 3 during long-term use, when the connecting wheel 3 needs to be installed, the insertion rod 1001 is inserted into the inner wall of the slot 1004 through the connection of the slot 1004, and the connecting clamping rod 1002 is driven to be inserted into the connecting box 1003, and when the extrusion part of the connecting clamping rod 1002 and the telescopic clamping rod 1005 is an inclined surface, the telescopic rod 1006 and the spring 1007 are squeezed until the connection part of the connecting clamping rod 1002 and the telescopic clamping rod 1005 is a plane, which plays a role in conveniently engaging and fixing the insertion rod 1001, so that the connecting wheel 3 can be conveniently engaged and installed on the surface of the connecting steel plate 2, thereby reducing the cumbersomeness of installing the connecting wheel 3 by bolts.

[0074] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flatbed truck for coal mines, comprising a flatbed truck body (1), a connecting steel plate (2) and connecting wheels (3), characterized in that: The bottom of the flatbed vehicle body (1) is slidably connected to a connecting steel plate (2), the outer wall of the connecting steel plate (2) is detachably connected to a connecting wheel (3), and the bottom of the flatbed vehicle body (1) is provided with a leveling mechanism (5); The leveling mechanism (5) comprises: A sliding rod (6), the bottom of the flatbed vehicle body (1) is slidably connected to the sliding rod (6), and is driven by a rotating assembly (8), and an adjustment groove (4) is provided at the connection portion between the bottom of the flatbed vehicle body (1) and the connecting steel plate (2); A lifting rod (7), the bottom of the flatbed vehicle body (1) is slidably connected to a connecting rod (901) and driven by a lifting assembly (9), the lifting rod (7) is slidably connected to the side wall of the flatbed vehicle body (1), and a connecting groove is provided at the connection portion between the side wall of the flatbed vehicle body (1) and the lifting rod (7); The rotating assembly (8) and the lifting assembly (9) are arranged on the same horizontal plane, and the sliding directions between the connecting rod (901) and the sliding rod (6) are opposite; The rotating assembly (8) comprises: A bevel gear set (802), wherein the bottom of the flatbed vehicle body (1) is fixedly connected to a servo motor (801), an output end of the servo motor (801) is fixedly connected to a bevel gear set (802) rotatably connected to the bottom of the flatbed vehicle body (1), and an outer wall of the bevel gear set (802) is fixedly connected to a rotating shaft (803); A first threaded rod (804), the end of the rotating shaft (803) is fixedly connected to the first threaded rod (804) threadedly connected to the outer wall of the sliding rod (6), a fixing groove (805) is provided at the connection portion between the bottom of the flatbed vehicle body (1) and the sliding rod (6), and the outer wall of the sliding rod (6) is rotatably connected to a rotating rod (806) rotatably connected to the outer wall of the connecting steel plate (2); A second threaded rod (807), the bottom of the flatbed vehicle body (1) is rotatably connected to a second threaded rod (807) threadedly connected to the outer wall of the connecting rod (901).

2. A flatbed truck for coal mines according to claim 1, characterized in that: The connecting rods (901) and the sliding rods (6) are provided in two groups, and the positions of the two groups of connecting rods (901) and the sliding rods (6) are distributed symmetrically with respect to the central axis of the flatbed vehicle body (1); The connecting steel plate (2) and the sliding rod (6) are arranged in a one-to-one correspondence, the thickness of the connecting steel plate (2) is 25 mm, the diameter of the connecting wheel (3) is 230 mm, and the wheelbase of the connecting wheel (3) is 1200 mm.

3. A flatbed truck for coal mines according to claim 1, characterized in that: The first threaded rods (804) are provided in two groups, and the rotation directions of the two groups of the first threaded rods (804) are opposite; the rotating rods (806) are provided in two groups, and the rotation directions of the two groups of the rotating rods (806) are opposite; The rotation center of the first threaded rod (804), the rotation center of the rotating shaft (803) and the rotation center of the second threaded rod (807) are all on the same horizontal plane.

4. A flatbed truck for coal mines according to claim 1, characterized in that: The first threaded rod (804) and the second threaded rod (807) rotate in opposite directions.

5. A flatbed truck for coal mines according to claim 1, characterized in that: The lifting assembly (9) comprises: A pulling rod (902), the outer wall of the connecting rod (901) is rotatably connected to a pulling rod (902) rotatably connected to the outer wall of the lifting rod (7), and the top of the lifting rod (7) is fixedly connected to a limiting plate (903) slidably connected to the side wall of the flatbed vehicle body (1).

6. A flatbed truck for coal mines according to claim 5, characterized in that: The outer wall profile of the limiting plate (903) is in a "U" shape, and the limiting plate (903) is symmetrically arranged on both sides of the flatbed vehicle body (1); Wherein, the lifting rod (7) and the limiting plate (903) are arranged in a one-to-one correspondence.

7. A flatbed truck for coal mines according to claim 2, characterized in that: The engaging mechanism (10) comprises: An insertion rod (1001), the outer wall of the connecting steel plate (2) is slidably connected with the insertion rod (1001), and a slot (1004) is provided at the connection portion between the outer wall of the connecting steel plate (2) and the insertion rod (1001); A connection box (1003), one end of the insertion rod (1001) is fixedly connected to a connection clamp rod (1002), the outer wall of the connection clamp rod (1002) is slidably connected to a connection box (1003) fixedly connected to the outer wall of the connection steel plate (2), and the inner wall of the connection box (1003) is telescopically connected to a telescopic clamp rod (1005) that is snap-connected to the outer wall of the connection clamp rod (1002); A pull block (1008), the outer wall of the telescopic rod (1005) is fixedly connected to a telescopic rod (1006) slidably connected to the outer wall of the connection box (1003), the outer wall of the telescopic rod (1006) is sleeved with a spring (1007) fixedly connected to the outer wall of the connection box (1003), and one end of the spring (1007) is fixedly connected to a pull block (1008) fixedly connected to one end of the telescopic rod (1006).

8. A flatbed truck for coal mines according to claim 7, characterized in that: The connection box (1003) is arranged on the movement track of the insertion rod (1001), the outer wall profile of the connection card rod (1002) is smaller than the inner wall profile of the slot (1004), and the outer wall profile of the connection portion between the connection card rod (1002) and the telescopic card rod (1005) is an inclined surface; A buffer extrusion block is provided at the connection position between the outer wall of the connecting steel plate (2) and the connecting wheel (3), and a connecting groove is provided at the connection position between the outer wall of the connecting box (1003) and the connecting clamping rod (1002).

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