Safety structure of hook head car and hook head car for narrow gauge of coal mine inclined shaft

Abstract

This invention relates to the field of auxiliary transportation technology in coal mines, and particularly to a safety structure for a hook-head car and a hook-head car for narrow-gauge inclined shafts in coal mines. The structure includes a roller mounted on the hook-head car body, a safety rope wound around the roller, and a wedge-shaped assembly for clamping the safety rope. The wedge-shaped assembly comprises a wedge-shaped cylinder and several wedge-shaped elements whose shape matches the wedge-shaped cylinder when closed. The several wedge-shaped elements are disposed within the wedge-shaped cylinder and form a channel through which the safety rope extends. The smaller diameter end of the wedge-shaped assembly faces the rear end of the hook-head car. During transportation, if a sudden backward pulling force occurs, the wedge-shaped assembly can radially lock the safety rope, gradually eliminating the impact force caused by the vehicle's uncontrolled descent, effectively preventing more serious accidents due to connection failure. It features a high degree of automation and rapid safety response.

Description

Technical Field

[0001] This invention relates to the field of auxiliary transportation technology in coal mines, and in particular to a safety structure for a hook car and a hook car for narrow-gauge inclined shafts in coal mines. Background Technology

[0002] Narrow-gauge auxiliary transport in inclined shafts is a rail-based material and personnel transport system that uses a winch and wire rope to pull the train along a fixed track within an inclined shaft. The track is laid on the bottom or sides of the inclined shaft. Narrow gauge refers to rails with a gauge less than the national standard railway gauge of 1435mm; 600mm and 900mm gauges are commonly used in underground coal mines. Unlike primary transport methods such as belt conveyors for coal transport, auxiliary transport is primarily responsible for transporting all materials and personnel except coal. Typically, a large hoisting winch is installed at the shaft entrance or underground yard. The winch wire rope is lowered into the inclined shaft, passes through a series of guide wheels, and connects to the hook car at the front of the transport vehicle. The winch operator controls the lowering and raising of the winch, propelling the entire train along the track.

[0003] Although some newly built mines have gradually adopted continuous transportation technologies such as monorail cranes or trackless rubber-tired vehicles, narrow-gauge transportation still dominates in most coal mines due to its mature technology and strong adaptability. In the narrow-gauge transportation system of inclined shafts, the hoisting link of the auxiliary inclined shaft is particularly critical, and the hook car, as the key equipment connecting the hoisting winch and the transport vehicle group, directly affects the safety and efficiency of the entire transportation process.

[0004] Currently, ordinary flatbed trucks or mine cars are commonly used as temporary hook-up vehicles in coal mines. However, this simple method has revealed many technical defects and safety hazards in practical applications, mainly in the following aspects:

[0005] Long materials are easily damaged during transportation. Ordinary flatbed trucks or mining cars lack specialized structures. When transporting long materials (such as rails and pipes), the two ends of the material are placed directly on the front and rear vehicles. The weight of the material can easily compress the connecting pins and three-ring chains between the vehicles, causing the connecting pins to deform or the connection to fail, resulting in a runaway accident due to uncoupling.

[0006] Mismatched traction heights cause the connecting pin to slip out of the chain. Narrow-gauge transport systems utilize various vehicle types. For example, to improve stability and load capacity, flatbed cars often use high-flanged, enclosed wheel assemblies; while to reduce weight and increase cushioning, mine cars and material cars frequently use low-flanged, perforated mine car wheel assemblies. There is approximately a 50mm height difference between these two types of wheel assemblies. When a regular flatbed car or mine car acts as a hook car to pull different types of vehicles, the mismatched traction heights cause the connecting three-link chain to be in a diagonal tension state. This diagonal tension generates a horizontal component force, which can easily cause the connecting pin to slip out of the chain link, posing a serious safety hazard of disengagement.

[0007] There is a lack of dedicated safety rope attachment devices. As a critical safety measure, the hook-lift vehicle must be able to reliably attach the safety rope to provide secondary protection in the event of failure of the main connection device. However, ordinary flatbed trucks or mining cars are not designed with fixed attachment points for the safety rope in mind, making it impossible to install the safety rope in a standardized and reliable manner, thus leaving the transportation process without a crucial final safety barrier.

[0008] Auxiliary tools and connecting devices have nowhere to be stored. During transport, hook-lift vehicles need to carry spare connecting pins, three-ring chains, wrenches, and other tools and parts. Ordinary vehicles lack dedicated toolboxes, and tools and items are haphazardly placed on the vehicle body, making them extremely prone to falling and being lost under the undulating and vibrating conditions of the inclined shaft. This not only causes wear and tear on tools and equipment, but the items scattered in the tunnel also pose a safety hazard to the vehicle.

[0009] To partially address the issue of missing safety rope attachment devices, an improvement has emerged in existing technology: adding a safety rope roller to the mine car's bucket. However, this still has significant shortcomings. Mine cars typically have a load capacity of 1-3 tons. When a runaway occurs, the safety rope tightens instantly, and the enormous impact force acts directly on the car's weak connection points through the roller. This can easily lead to structural damage and tearing of the car, rendering the safety measures ineffective and unable to effectively brake and stop the runaway.

[0010] In summary, existing hook-lift vehicles suffer from systemic deficiencies in structural strength, integrated safety features, and adaptability to the unique working conditions of inclined shaft transportation. These deficiencies not only affect transportation efficiency but also pose significant safety hazards for underground auxiliary transportation. Therefore, there is an urgent need for a robust, functionally integrated hook-lift vehicle that can completely resolve these technical problems. Summary of the Invention

[0011] (a) Technical problems to be solved

[0012] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a safety structure for a hook car and a hook car for narrow rails in inclined shafts of coal mines, which solves the technical problems of existing hook cars, such as easy damage to connecting pins when transporting long materials, mismatch in traction height leading to the oblique pull pin of the three-ring chain, and lack of a dedicated safety rope mounting device.

[0013] (II) Technical Solution

[0014] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0015] A safety structure for a hook-head vehicle includes: a roller disposed on the body of the hook-head vehicle, a safety rope wound around the roller, and a wedge-shaped assembly for clamping the safety rope;

[0016] The wedge assembly includes a wedge-shaped cylinder and several wedge-shaped components whose shape matches the wedge-shaped cylinder when enclosed;

[0017] The plurality of wedge-shaped elements are disposed inside the wedge-shaped cylinder and enclose a channel through which the safety rope extends;

[0018] The smaller diameter end of the wedge-shaped assembly is positioned towards the rear end of the hook car.

[0019] The radial cross-section of the wedge-shaped tube is circular or square.

[0020] If the radial cross-section of the wedge-shaped cylinder is circular, the number of the wedge-shaped elements is at least two;

[0021] If the radial cross-section of the wedge-shaped cylinder is square, the number of wedge-shaped components is 2 or 4.

[0022] A hook car for narrow rails in inclined shafts of coal mines includes: a car body and the safety structure, wherein the roller is disposed in a mounting cavity inside the car body;

[0023] The wedge-shaped tube passes through the rear wall of the mounting cavity, and the safety rope extends out of the vehicle body through the channel formed by the wedge-shaped member.

[0024] The mounting cavity is provided with a connecting frame, and the connecting frame is provided with connecting shafts on opposite sides. The center of the connecting shaft is located on the center line of the hook car, and the roller is rotatably connected to the connecting shaft.

[0025] The rear side of the vehicle body is provided with multiple connecting plates along the vertical direction, and each connecting plate is provided with a coaxial pin hole, in which a connecting pin is inserted.

[0026] It also includes a three-ring chain bracket, wherein the rear side of the vehicle body is provided with a three-ring chain bracket pin hole between adjacent connecting plates, and the three-ring chain bracket is inserted and fixed in the three-ring chain bracket pin hole.

[0027] The rear top of the vehicle body is equipped with a bracket for supporting transported goods.

[0028] The support structure is triangular.

[0029] The front width of the vehicle body is greater than the rear width;

[0030] A first toolbox is located at the top front of the vehicle body, and a second toolbox and a third toolbox are located at intervals behind the first toolbox.

[0031] (III) Beneficial Effects

[0032] The beneficial effects of this invention are as follows: This invention provides a safety structure for a hook-and-rail auxiliary transport system in narrow-gauge inclined shafts of coal mines. By setting a wedge-shaped component, it can effectively prevent runaway accidents in situations such as misalignment, chain breakage, or connection failure. During transport, if a sudden backward pulling force occurs, the wedge-shaped component can radially lock the safety rope, gradually eliminating the impact force generated by the vehicle's uncontrolled slide, effectively preventing more serious accidents due to connection failure. It features a high degree of automation and rapid safety response.

[0033] This invention provides a hook car for narrow-gauge inclined shafts in coal mines, serving as the head of a transport train. By setting a detachable three-ring chain bracket between the connecting plates, the three-ring chain can be limited and fixed between the three-ring chain bracket and the connecting plates, changing the traction height of the three-ring chain and limiting its vertical displacement. This allows the hook car to pull mine cars, flatbed cars, material cars, etc., of different heights, finely distinguishing the traction height and eliminating the risk of the three-ring chain slipping.

[0034] The vehicle body is equipped with a bracket on the top to support transported goods. Long materials can lean against the inclined surface of the bracket to prevent them from pressing on the pin hole and to facilitate the installation of the connecting pin.

[0035] By designing a body that is wider at the front and narrower at the rear, it is easier to haul and transport long materials while having more space to arrange other functional components. The narrow rear structure is beneficial for operation in narrow rails and limited spaces, improving the space utilization efficiency and versatility of the vehicle body. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of the hook-head vehicle of the present invention (including safety rope, wedge assembly and toolbox).

[0037] Figure 2 This is a schematic diagram of the hook-head vehicle of the present invention (excluding the safety rope, wedge assembly, and toolbox).

[0038] Figure 3 This is a schematic diagram of the hook-head vehicle of the present invention (excluding the toolbox);

[0039] Figure 4 This is a rear view of the hook-lift vehicle of the present invention;

[0040] Figure 5 This is a side view of the hook-head vehicle of the present invention;

[0041] Figure 6 This is a front view of the wedge-shaped component of the present invention (when the safety rope is not under force).

[0042] Figure 7 This is a top view of the wedge-shaped component of the present invention;

[0043] Figure 8This is a schematic diagram of the wedge-shaped member and wedge-shaped cylinder of the present invention when the safety rope is not under force;

[0044] Figure 9 This is a front view of the wedge-shaped component of the present invention (when the safety rope is under stress).

[0045] Figure 10 This is a schematic diagram of the wedge-shaped member and wedge-shaped cylinder of the present invention when the safety rope is under force;

[0046] Figure 11 This is a top view of the three-ring chain bracket of the present invention;

[0047] Figure 12 This is a schematic diagram of the connection structure between the hook-head car and the flatbed car of the present invention;

[0048] Figure 13 This is a schematic diagram of the connection structure between the hook car and the mine car of the present invention.

[0049] [Explanation of Labels in the Attached Image]

[0050] 1: Vehicle body;

[0051] 11: Installation cavity;

[0052] 12: Three-ring chain bracket pin hole;

[0053] 13: Connecting plate; 131: Pin hole; 132: Connecting pin;

[0054] 21: Roller; 211: Pin hole;

[0055] 22 safety rope;

[0056] 23: Wedge-shaped component;

[0057] 24: Wedge-shaped tube;

[0058] 25: Connecting bracket;

[0059] 26: Connecting shaft;

[0060] 31: Three-ring chain bracket;

[0061] 32: Three-ring chain;

[0062] 4: Bracket;

[0063] 51: The First Toolbox;

[0064] 52: Second Toolbox;

[0065] 53: The Third Toolbox. Detailed Implementation

[0066] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0067] Example 1:

[0068] See appendix Figure 6-10 As shown, a safety structure for a hook-lift vehicle includes: a roller 21 disposed on the body 1 of the hook-lift vehicle; a safety rope 22 wound around the roller 21; and a wedge assembly for clamping the safety rope 22. The wedge assembly includes a wedge cylinder 24 and several wedge-shaped elements 23 whose shape matches the wedge cylinder 24 when closed. The several wedge-shaped elements 23 are disposed within the wedge cylinder 24 and are arranged to form a channel through which the safety rope 22 extends; the small-diameter end of the wedge assembly faces the rear end of the hook-lift vehicle.

[0069] By incorporating a safety structure, runaway accidents can be effectively prevented in situations such as chain breakage, disconnection, or connection failure. During transport, if a sudden backward pull occurs, the wedge-shaped assembly can radially engage the safety rope, gradually eliminating the impact force generated by the vehicle's uncontrolled slide. This effectively prevents more serious accidents caused by connection failure, demonstrating a high degree of automation and rapid safety response.

[0070] The inner diameter of the wedge-shaped tube 24 gradually decreases from front to back. Optionally, the radial cross-section of the wedge-shaped tube 24 is circular or square. If the radial cross-section of the wedge-shaped tube 24 is circular, the number of wedge-shaped elements 23 is at least two. If the radial cross-section of the wedge-shaped tube 24 is square, the number of wedge-shaped elements 23 is two or four.

[0071] Example 2:

[0072] See appendix Figure 1-13As shown, this invention provides a hook car for narrow-gauge inclined shafts in coal mines, serving as the head of a transport train. It includes a body 1 and a safety structure. A roller 21 is installed in an mounting cavity 11 inside the body 1. A wedge-shaped cylinder 24 passes through the rear end of the body 1. A safety rope 22 extends out of the body 1 through a channel formed by wedge-shaped components 23. The safety rope 22 is used to connect a flatbed car, material car, or mine car behind the hook car. By incorporating a safety structure into the hook car, runaway accidents can be effectively prevented in cases of misalignment, chain breakage, or connection failure. During transport, if a sudden backward pull occurs, the wedge-shaped component can radially lock the safety rope, gradually eliminating the impact force generated by the vehicle's uncontrolled descent, effectively preventing more serious accidents due to connection failure. It features a high degree of automation and rapid safety response. By embedding the safety rope component within the body, the problems of traditional, completely externally mounted safety rope components being susceptible to impact damage and snagging on obstacles are solved, significantly improving the equipment's passability and durability in narrow and complex underground environments. By using rollers to retract and extend the safety rope, the operation becomes more convenient and efficient when connecting trains of different lengths.

[0073] The vehicle body 1 has an internal mounting cavity 11, which, in this embodiment, is located approximately in the middle of the vehicle body 1. A roller 21 is rotatably connected to the mounting cavity 11. A wedge-shaped cylinder 24 extends from the mounting cavity 11 to the rear end of the vehicle body 1 in a front-to-back direction. A safety rope 22 passes through a wedge-shaped element 23 within the wedge-shaped cylinder 24 and extends to the outside of the vehicle body 1. In this embodiment, the wedge-shaped cylinder 24 is conical, with its inner diameter gradually decreasing from front to rear.

[0074] Depending on the length of the vehicle body 1 and the rear wall thickness, the wedge-shaped cylinder 24 may optionally include a wedge-shaped section and a cylindrical section. A wedge-shaped element 23 is disposed within the wedge-shaped section, and the cylindrical section is used for the passage of the safety rope 22. The safety rope 22 emerges from the mounting cavity 38, passes sequentially through the channel formed by the wedge-shaped element 23 within the wedge-shaped section and the cylindrical section, and then extends from the rear end of the vehicle body 1, with its exit path protected. The wedge-shaped section provides the structural basis for the automatic clamping function, while the cylindrical section provides guidance and a passage for the safety rope 22 to exit the vehicle body 1, adapting to different vehicle body lengths.

[0075] Multiple wedge-shaped elements 23 are slidably connected within the wedge-shaped section of the wedge-shaped cylinder 24, their shapes fitting perfectly to the wedge-shaped section of the wedge-shaped cylinder 24 after being enclosed. See Appendix. Figure 1 and attached Figure 3As shown, when the safety rope 22 moves backward, it drives the wedge 23 to slide along the conical inner wall of the wedge cylinder 24, radially clamping the safety rope 22. Through the sliding engagement between the wedge 23 and the wedge cylinder 24, a self-locking mechanism that tightens as it is pulled is achieved. If a sudden backward pull occurs during transportation, such as a broken pin, chain break, or other connection failure, this mechanism automatically activates without manual intervention. The wedge 23 locks the safety rope 22, gradually eliminating the impact force caused by the vehicle's uncontrolled descent, effectively preventing more serious accidents due to connection failure. It features a high degree of automation and rapid safety response. Since the hook-lift car is used for narrow-gauge auxiliary transportation in coal mine inclined shafts, it moves in a unidirectional manner during train operation; therefore, the wedge 23 does not require a reverse anti-derailment device.

[0076] Among them, the wedge-shaped cylinder 24 is set on the center height line of the hook car and slightly to the left of the center line of the hook car, that is, the rope outlet position of the safety rope drum 21, and runs through the car body.

[0077] During processing, the wedge 23 is first formed into a cone or frustum shape as a whole, and then divided along the center line of the cross to form the wedge 23. The wedge 23 encloses and forms a channel for passing through and fixing the safety rope 22.

[0078] When in use, one end of the wire rope used as the safety rope 22 is fixed to the drum 21 and wound around ≥3 times. The other end is passed through the wedge tube 24. After leaving the length of the trailer of the traction train as specified in the regulations at the outlet, a heart-shaped loop is made with the wire rope clamp according to the relevant regulations and connected to the tail car (the tail of the last car) of this train. Then, the safety rope 22 is fixed in the wedge tube 24 with the wedge 23.

[0079] When a chain breaks, other connection failures or other issues occur during operation, the force of the vehicle sliding down a slope puts stress on the safety rope 22. After the safety rope 22 is stressed, the wedge assembly, under the action of the wedge cylinder 24, forms a gripping force on the safety rope 22 with the wedge member 23. The force of the vehicle sliding down the slope and the gripping force of the wedge member 23 on the safety rope 22 are directly proportional. As the gripping force of the wedge member 23 on the safety rope 22 gradually increases, the strong impact force generated by the vehicle sliding down uncontrollably can be effectively prevented from directly bearing the strong impact force generated by the vehicle sliding down uncontrollably without any buffering, thus reducing the occurrence of the safety rope 22 breaking and runaway accidents.

[0080] The mounting cavity 11 is located below the top end plate of the vehicle body 1. A connecting frame 25 is installed within the mounting cavity 11, and connecting shafts 26 are located on opposite sides of the connecting frame 25. The connecting shafts 26 are located in the middle of the vehicle body 1, and the roller 21 is rotatably connected to the connecting shafts 26. The center point of the connecting shaft 26 is on the centerline of the hook car, and the center height line of the roller 21 coincides with the center height line of the hook car. The connecting frame 25 and connecting shafts 26 provide stable and reliable central rotational support for the roller 21. This ensures smooth rotation of the roller 21, reduces wear, and distributes the load-bearing points to the central structure of the vehicle body, enhancing the overall structural stability and load-bearing capacity, and extending its service life.

[0081] The roller 21 is provided with a pin hole 211, through which a pin passes to engage with the vehicle body 1 to secure the roller 21. Optionally, the vehicle body 1 may be provided with a corresponding slot or an insertion port may be provided on the top sealing plate. This pin structure allows for quick locking of the roller 21, preventing the safety rope 22 from being accidentally released or retracted due to vibration or shaking during transportation, ensuring a constant connection length, and improving the stability and controllability of the transportation process. This structure is simple, reliable, and easy to operate.

[0082] Multiple connecting plates 13 are provided vertically along the rear side of the train body 1. There are at least three connecting plates 13, and each connecting plate 13 has a coaxial pin hole 131 in which a connecting pin 132 is inserted. Through the vertically arranged connecting plates 13 and connecting pins 132, a quick and secure connection with the traction ring of standard vehicles such as flatbed cars and mine cars can be achieved, and disassembly is easy, which enhances the connection strength and versatility of the entire train formation.

[0083] The hook car also includes a three-ring chain bracket 31. The rear side of the body 1 is provided with a three-ring chain bracket pin hole 12 between adjacent connecting plates 13. The three-ring chain bracket 31 is inserted and fixed in the three-ring chain bracket pin hole 12.

[0084] Adjacent vehicles are connected by a three-ring chain 32. A three-ring chain bracket 31 supports the three-ring chain 32, fixing it between the connecting plate 13 and the three-ring chain bracket 31. By adding a three-ring chain bracket pin hole 12, which works in conjunction with the three-ring chain bracket 31, the hook car can pull mine cars, flatbed cars, material cars, etc., of different heights, allowing for more precise differentiation of pulling heights and eliminating the risk of the three-ring chain 32 being pulled diagonally or shifting.

[0085] The front section of the vehicle body 1 is wider than the rear section. In this embodiment, the main body of the vehicle body 1 is T-shaped, which facilitates the traction and transportation of long materials (the length of the materials exceeds 2 meters outside the vehicle). The structural layout of the vehicle body 1 has been optimized. The design of being wider at the front and narrower at the rear allows for more space in the front to arrange other functional components, while the narrow design at the rear is conducive to transporting ultra-long materials such as plastic pipes. The vehicle body 1 is conducive to operation in narrow rails and limited spaces, improving the space utilization efficiency and versatility of the vehicle body 1.

[0086] The top of the rear section of the vehicle body 12 is equipped with a bracket 4 for supporting transported goods, effectively preventing long items from pressing on the pin hole. In this example, the bracket 4 has a triangular structure, and long materials can lean against the inclined surface of the bracket 4 to prevent them from pressing on the pin hole 131.

[0087] A first toolbox 51 is located on the top of the front section of the vehicle body 11. A second toolbox 52 and a third toolbox 53 are located at intervals behind the first toolbox 51. Two types of toolboxes, long and short, are added to the front section of the vehicle body 11. The long toolbox stores long tools such as expansion joints, conveyor belts, pry bars, and pressure rods. A short toolbox is added to each side; one stores a three-ring chain 32, and the other stores a connecting pin 132. This not only facilitates scientific management but also adds counterweight to the hook-lift vehicle. This allows for quick on-site handling of minor faults or routine inspections, reducing the time spent retrieving tools and meeting the needs of efficient underground operations. It also improves the ease of operation and maintenance of the equipment and its adaptability to underground work.

[0088] Example 3:

[0089] The hooklift vehicle's body 1 is welded together from a front body section 11 and a rear body section 12. The front body section 11 is wider than the rear body section 12, and three toolboxes (51, 52, 53) are fixed to the top of the front body section 11 for storing tools and accessories. The rear body section 12 is narrower, and a triangular metal bracket 4 is welded to its top for placing or securing transported materials, such as equipment or pipes. The bracket 4 is made of φ15mm round steel and is welded at a distance of 20-30mm from the rear end of the body section 1.

[0090] The bottom of the vehicle body 1 is equipped with wheels that match the gauge of the narrow rails of the coal mine inclined shaft.

[0091] The vehicle body 1 has an internal mounting cavity 11. In the center of the mounting cavity 11, a U-shaped connecting frame 25 is bolted to the inner wall of the cavity. A connecting shaft 26 is vertically positioned between the two side plates of the connecting frame 25. A freely rotatable roller 21 is mounted on the connecting shaft 26 via bearings on both sides, allowing the roller 21 to rotate around the axis of the connecting shaft 26. A 15-meter-long steel wire rope safety rope 22 is fixed at one end and wound around the roller 21. When it is necessary to release or retract the safety rope 22, the roller 21 can be rotated; after the length is adjusted, a pin is passed through the pin hole 211 on the roller 21, with its end abutting against the inner wall of the mounting cavity 11, thus locking the roller 21 and preventing accidental rotation.

[0092] A wedge-shaped cylinder 24 is provided on the rear wall of the mounting cavity 11, extending from front to back.

[0093] The front end of the wedge-shaped tube 24 is wedge-shaped, with its inner diameter gradually decreasing from front to rear. The rear end of the wedge-shaped tube 24 is cylindrical and is used to pass through the safety rope 22. Four enclosing copper wedge-shaped pieces 23 are placed inside the wedge-shaped groove. The free end (i.e., the working end) of the safety rope 22 passes through the passage formed by the copper wedge-shaped pieces 23 in sequence and extends out of the rear end of the vehicle body 1.

[0094] Its working principle is as follows: When a following vehicle (such as a flatbed truck) towed by the hook-lift truck brakes suddenly or collides, it will generate a huge backward pulling force on the safety rope 22. This pulling force will cause the safety rope 22 to move backward, and cause the wedge-shaped piece 23 wrapped around it to move backward as well. As the conical inner diameter of the wedge cylinder 24 gradually decreases, the wedge-shaped piece 23 is squeezed by the conical surface of the groove during its backward movement, thereby generating a strong radial clamping force, firmly clamping the safety rope 22, achieving instantaneous self-locking, and preventing the safety rope 22 from being completely pulled out or the vehicle from disengaging.

[0095] At the rear end of the vehicle body 1, three parallel and vertically arranged connecting plates 13 are welded on. Each connecting plate 13 has a coaxial pin hole 131. By inserting a connecting pin 132 into the pin hole 131, the hook car can be connected to the traction ring of the first flatbed car or mine car behind it. In the vehicle body area between two connecting plates 13, a three-ring chain bracket pin hole 12 is also provided, into which the insert rod of a U-shaped three-ring chain bracket 31 can be inserted to support the three-ring chain 32 during transportation and prevent it from swinging.

[0096] At the front end of the vehicle body 1, two parallel and vertically arranged connecting plates 13 are welded on for connecting the lifting equipment.

[0097] The hook-and-loop car features a built-in roller structure 21, allowing the safety rope length to be flexibly adjusted according to the train formation. Its wedge-shaped self-locking mechanism reacts quickly and automatically locks the safety rope 22 in the event of an accident, greatly improving the safety and reliability of the inclined shaft transportation process. Meanwhile, its wide-front, narrow-rear body structure 1, toolbox, and support frame 4 design enhance space utilization and ease of operation.

[0098] The hook car for narrow rails in inclined shafts of coal mines provided by the present invention can effectively prevent runaway accidents in the event of misalignment, chain breakage, or connection failure by setting the aforementioned safety rope assembly.

[0099] By setting up a wedge-shaped component, the safety rope 22 can be buffered and locked in the event of a sudden backward pull during transportation, gradually eliminating the impact force caused by the vehicle slipping out of control. This effectively prevents the train from causing more serious accidents due to connection failure, and features a high degree of automation and fast safety response.

[0100] By setting a detachable three-ring chain bracket 31 between the connecting plates 13, the three-ring chain 32 can be limited and fixed between the three-ring chain bracket 31 and the connecting plate 13, thereby changing the traction height of the three-ring chain 32 and limiting the vertical displacement of the three-ring chain 32. This allows the hook car to pull mine cars, flatbed cars, material cars, etc. of different heights, refines the differentiation of traction heights, and eliminates the risk of the three-ring chain 32 being pulled obliquely.

[0101] By setting the body 1 to be wider at the front and narrower at the rear, it is not only convenient to tow and transport long materials, but also has more space to arrange other functional components. The narrow rear structure is conducive to operation in narrow rails and limited spaces, thus improving the space utilization efficiency and versatility of the body 1.

[0102] A bracket 3 is provided at the top of the rear section of the vehicle body 1, which can effectively prevent long parts from pressing on the pin hole 131 during transportation.

[0103] In the description of this invention, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0104] 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0105] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0106] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present 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.

[0107] 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 modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety structure for a hook-lift vehicle, characterized in that, include: A roller (21) is provided on the body (1) of the hook car, a safety rope (22) is wound around the roller (21), and a wedge assembly is used to clamp the safety rope (22); The wedge assembly includes a wedge cylinder (24) and several wedge-shaped pieces (23) whose shape matches the wedge cylinder (24) after being enclosed. The plurality of wedge-shaped pieces (23) are disposed inside the wedge-shaped tube (24) and enclose to form a channel through which the safety rope (22) extends; The smaller diameter end of the wedge-shaped assembly is positioned towards the rear end of the hook car.

2. The safety structure of the hook-head car according to claim 1, characterized in that, The radial cross-section of the wedge-shaped tube (24) is circular or square.

3. The safety structure of the hook-head car according to claim 1, characterized in that, If the radial cross-section of the wedge-shaped tube (24) is circular, the number of the wedge-shaped elements (23) is at least two; If the radial cross section of the wedge tube (24) is square, the number of the wedges (23) is 2 or 4.

4. A hook-and-loop car for narrow-gauge inclined shafts in coal mines, characterized in that, include: The vehicle body (1) and the safety structure according to any one of claims 1-3, wherein the roller (21) is disposed in the mounting cavity (11) inside the vehicle body (1). The wedge-shaped tube (24) passes through the rear wall of the mounting cavity (11), and the safety rope (22) extends out of the vehicle body (1) through the channel formed by the wedge-shaped member (23).

5. The hook-up car for narrow-gauge inclined shafts in coal mines according to claim 4, characterized in that, The mounting cavity (11) is provided with a connecting frame (25), and connecting shafts (26) are provided on opposite sides of the connecting frame (25). The center of the connecting shaft (26) is located on the center line of the hook car, and the roller (21) is rotatably connected to the connecting shaft (26).

6. The hook-up car for narrow-gauge inclined shafts in coal mines according to claim 4, characterized in that, The rear side of the vehicle body (1) is provided with a plurality of connecting plates (13) in the vertical direction. Each connecting plate (13) is provided with a coaxial pin hole (131) and a connecting pin (132) is inserted into the pin hole (131).

7. The hook-up car for narrow-gauge inclined shafts in coal mines according to claim 6, characterized in that, It also includes a three-ring chain bracket (31), and the rear side of the vehicle body (1) is provided with a three-ring chain bracket pin hole (12) between adjacent connecting plates (13), and the three-ring chain bracket (31) is inserted and fixed in the three-ring chain bracket pin hole (12).

8. The hook-up car for narrow-gauge inclined shafts in coal mines according to claim 4, characterized in that, The rear top of the vehicle body (1) is provided with a bracket (4) for supporting transported goods.

9. The hook-up car for narrow-gauge inclined shafts in coal mines according to claim 8, characterized in that, The support (4) has a triangular structure.

10. The hook car for narrow-gauge inclined shafts in coal mines according to claim 4, characterized in that, The front width of the vehicle body (1) is greater than the rear width; A first toolbox (51) is provided at the top front end of the vehicle body (1), and a second toolbox (52) and a third toolbox (53) are provided at intervals behind the first toolbox (51).

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